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WO2011057572A1 - 一种触摸屏、触摸系统及光源 - Google Patents

一种触摸屏、触摸系统及光源 Download PDF

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Publication number
WO2011057572A1
WO2011057572A1 PCT/CN2010/078665 CN2010078665W WO2011057572A1 WO 2011057572 A1 WO2011057572 A1 WO 2011057572A1 CN 2010078665 W CN2010078665 W CN 2010078665W WO 2011057572 A1 WO2011057572 A1 WO 2011057572A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light guide
guide body
light source
reflecting
Prior art date
Application number
PCT/CN2010/078665
Other languages
English (en)
French (fr)
Inventor
叶新林
刘建军
刘新斌
Original Assignee
北京汇冠新技术股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京汇冠新技术股份有限公司 filed Critical 北京汇冠新技术股份有限公司
Publication of WO2011057572A1 publication Critical patent/WO2011057572A1/zh

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0428—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by sensing at the edges of the touch surface the interruption of optical paths, e.g. an illumination plane, parallel to the touch surface which may be virtual
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0025—Diffusing sheet or layer; Prismatic sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/003—Lens or lenticular sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer

Definitions

  • the present invention relates to photodetection technology, and more particularly to a touch screen, a touch system, and a light source. Background technique
  • one is an infrared touch screen that uses an infrared emitting and receiving tube array to form an infrared scanning grid; the other is an optical sensing unit such as a camera.
  • the optical touch screen of the sensing element is an infrared touch screen that uses an infrared emitting and receiving tube array to form an infrared scanning grid.
  • the optical sensing unit it is necessary to provide a light source in the above optical touch screen to provide detection light for the optical sensing unit.
  • the light emitted by the light source is distributed on the touch detection area of the touch panel, and the optical sensing unit is configured to acquire touch data generated on the touch detection area.
  • the touch screen including the light source works well under most operating conditions after the light source is improved, the detection environment is detected when the frame frequency of the optical sensing unit (such as the camera) is high. A few changes may affect the judgment of the optical sensing unit on the touch. In other words, when the frame rate of the optical sensing unit is high, the reliability of the detection result is poor. Therefore, at present, the industry is generally working on how to improve the stability of the detection environment, specifically, for example, how to enhance the uniformity of illumination of the light source.
  • the present invention provides a touch screen for enhancing the uniformity of light distributed over the touch detection area therein.
  • the present invention provides a touch system for enhancing the distribution in the touch screen. Uniformity of light on the touch detection zone; the present invention provides A light source that enhances the uniformity of the light emitted by it.
  • a first aspect of the present invention provides a light source including an illuminator, a light guide body, and a reflection unit, wherein the illuminant is disposed at a port of the light guide body, and the reflection unit is formed on a side of the light guide body A part of the light transmitted in the light guiding body is reflected by the reflecting unit and is emitted from a side of the light guiding body away from the reflecting unit.
  • the reflecting unit is a reflecting plate or a reflective film; the reflecting plate is separated from or attached to a side surface of the light guiding body, and a side of the reflecting plate facing the light guiding body A reflective surface is formed; the reflective film is attached or embedded in a side surface of the light guide.
  • the reflective surface and/or the side of the light guide body adjacent to the reflective unit includes at least two inclined surface groups, each of the inclined surface groups includes two inclined surfaces having an included angle, and each of the inclined surface groups is continuously arranged.
  • the adjacent set of inclined faces have the same angle, or the set of inclined faces gradually decreases along the port of the guide to the center, and the set of inclined faces along the transverse direction of the light guide body The angle between the bevel groups is gradually reduced from the sides of the light guiding body near the reflecting unit and/or the sides of the reflecting surface to the center.
  • each of the inclined surface groups is equal in height, or the height of each of the inclined surface groups is determined by the light guiding body and/or the reflecting plate when the inclined surface group is along a longitudinal cutting direction of the light guiding body
  • the port to the center gradually increases, and the center of each of the inclined surface groups gradually increases as the inclined surface group faces the transverse direction of the light guiding body.
  • the reflective surface and/or the side of the light guide body adjacent to the reflective unit includes at least two curved surfaces, each of the curved surfaces being continuously arranged; adjacent curved surfaces having the same arc length And arcs; or, when each of the arc faces is along the longitudinal section of the light guide body, if each of the arc faces has the same arc length, the arc is from the port of the light guide body and/or the reflector plate to The center gradually increases, and if the arc faces have the same arc, the arc length thereof gradually decreases from the port to the center of the light guide body and/or the reflector plate; each of the arc faces along the light guide body In the cross-sectional direction, if each arc surface has the same arc length, the arc is gradually increased from the side of the light guiding body close to the reflecting unit and/or the two sides of the reflecting surface to the center; if each arc surface has The same arc, then the arc length is guided by the guide
  • each of the rectangular cross-sections is equal in height, or each of the rectangular cross-sections is along a longitudinal section of the light guide body, and the height of each of the rectangular cross-sections is controlled by the light guide body and/or the reflection
  • the port of the plate is increased to the center; when the rectangular cross-section is along the transverse plane of the light guide body, the height of each of the rectangular cross-sections is close to the side of the reflective unit and/or the side of the light guide body
  • the two sides of the reflecting surface gradually increase toward the center.
  • the reflecting surface and/or the side of the light guiding body adjacent to the reflecting unit is a plane, and an angle between the plane and the light emitting surface is less than 90 degrees.
  • the reflecting unit covers a top surface and a bottom surface of the light guiding body.
  • the light source further includes a astigmatism substance, the astigmatism substance is located between the reflection unit and the light guide body, and a part of the light transmitted in the light guide body passes through the astigmatism substance to reach away from the reflection The side of the unit is shot.
  • the illuminant is a light emitting diode or a cold cathode fluorescent lamp.
  • the light guide body is one of glass, optical fiber or acrylic.
  • a astigmatism substance is attached or embedded at a port of the light guide body, and the illuminant body provides a touch screen including a touch detection area, and an optical sensing unit for acquiring a touch data on the touch detection area; a control unit coupled to the optical sensing unit and determining a touch position by using the touch data acquired from the optical sensing unit; and, according to the first aspect of the present invention a light source, the light source is disposed on at least one side of the touch detection area, and wherein a side of the light guide body formed with the reflection unit is away from the touch detection Measuring area.
  • a third aspect of the present invention provides a touch system including the above touch screen.
  • the light source, touch screen and touch system provided by the present invention have the following advantages:
  • the invention provides a light source, which comprises an illuminant, a light guide body and a reflection unit by adjusting a structure of the light source, and placing the illuminant at a port of the light guide body, the reflection unit is formed
  • Light emitted by the illuminator is incident on the light guide body and transmitted in the light guide body at a side of the light guide body, wherein a part of the light is reflected by the reflection unit and then guided by the light guide
  • the body is emitted away from the side surface of the reflecting unit; that is, the surface light source is configured by the light emitting body and the light guiding body, and the uniformity of the light emitted by the surface light source is improved by the reflecting unit based on the reflection principle. Enhances the uniformity of the light emitted by it.
  • the invention provides a light source by designing a reflection surface of the reflector and/or a structure of a side surface of the light guide body (for example, in a longitudinal section and/or a cross section of the light guide body)
  • the side surface and/or the reflecting surface comprises at least two inclined surface groups, curved surfaces or rectangular cross sections; or directly, the side surfaces are inclined surfaces, so that when the reflecting plate is formed at the side surface, the change can be changed
  • the angle of the light that is directed toward the reflector adjusts the effect of the light emission; or, when the reflective film is attached or embedded on the side, the effect of the light emission can be adjusted by changing the shape of the reflective film;
  • the uniformity of the light emitted by the light source is a reflection surface of the reflector and/or a structure of a side surface of the light guide body (for example, in a longitudinal section and/or a cross section of the light guide body)
  • the side surface and/or the reflecting surface comprises at least two inclined surface groups, curved surfaces or rectangular cross sections;
  • a touch screen comprising: an illuminant, a light guide body and a reflection unit by adjusting a light source structure, and placing the illuminant at a port of the light guide body, wherein the reflection unit is formed in the Light from the illuminator is incident on the light guide body and transmitted in the light guide body, wherein a part of the light is reflected by the reflection unit and distributed on the side of the light guide body away from the touch detection area
  • the touch detection area that is, the surface light source is configured by the illuminant and the light guide, and the uniformity of the light emitted by the surface light source is improved by the reflection unit based on the reflection principle, thereby enhancing distribution in the Touching the uniformity of light on the detection zone;
  • the present invention provides a touch screen by designing a reflective surface in the reflective plate and/or a structure in the light guiding body away from the side of the touch detecting area (eg, in a longitudinal section of the light guiding body and/or a rectangular cross section; or, directly, the side surface is a bevel), so that the reflecting plate is formed in the
  • the effect of light emission can be adjusted by changing the angle of the light that is directed toward the reflector; or, when the reflective film is attached or embedded on the side, the light can be adjusted by changing the shape of the reflective film.
  • the effect of the emission thus, the uniformity of the light distributed on the touch detection area can be enhanced;
  • the light source includes an illuminant, a light guide body and a reflection unit by adjusting a structure of the light source therein, and the illuminant is placed at a port of the light guide body, a reflection unit is formed at a side of the light guide body away from the touch detection area, and the reflection unit is further reflected by the reflection unit and distributed in the touch detection area; that is, the illuminant and the light guide are used first.
  • the invention provides a touch system, by designing a reflection surface in the reflection plate and/or a side of the light guide body away from the touch detection area disposed in an inner light source thereof (for example, in the light guide)
  • the side surface and/or the reflecting surface comprises at least two bevel sets, curved faces or rectangular cross sections; or, directly, the side faces are beveled), so that
  • the reflecting plate is formed at the side surface, the effect of light emission can be adjusted by changing the angle of the light that is directed toward the reflecting plate; or, when the reflective film is attached or embedded on the side surface, the reflection can be changed
  • the morphology of the film adjusts the effect of light emission; this enhances the uniformity of light distributed over the touch detection area of the touch screen.
  • FIG. 2 is a cross-sectional view showing the structure of an illuminant and a light guide body in the first embodiment of the touch screen of the present invention
  • FIG. 3 is a schematic structural view of a second embodiment of a touch screen of the present invention.
  • FIG. 4 is a schematic structural view of a top surface of a light guide body in an embodiment of a touch screen according to the present invention.
  • FIG. 5 is a schematic structural diagram of a third embodiment of a touch screen according to the present invention.
  • FIG. 6 is a schematic view showing a cutting direction in an embodiment of a touch screen according to the present invention.
  • FIG. 7 is a longitudinal cross-sectional view of a light guide body in a fourth embodiment of the touch screen of the present invention.
  • FIG. 8 is a longitudinal cross-sectional view of a light guide body in a fifth embodiment of the touch screen of the present invention.
  • FIG. 9 is a longitudinal cross-sectional view of a light guide body in a sixth embodiment of the touch screen of the present invention.
  • FIG. 10 is a schematic cross-sectional view of a light guide body in a seventh embodiment of the touch screen of the present invention.
  • FIG. 11 is a schematic cross-sectional view of a light guide body in an eighth embodiment of the touch screen of the present invention.
  • FIG. 12 is a schematic cross-sectional view of a light guide body in a ninth embodiment of the touch screen of the present invention.
  • FIG. 13 is a schematic cross-sectional view of a light guide body in a tenth embodiment of the touch screen of the present invention.
  • the touch screen comprises: a light source 100, a touch detection area 120, and a camera 140 (in other embodiments, other optical sensors such as a camera, a camera or an optical sensor) Unit) and control unit.
  • the light source 100 is used to illuminate the touch detection area 120
  • the camera 140 is used to acquire touch data generated on the touch detection area 120.
  • the control unit is coupled to the camera 140 and determines the touch position using the touch data acquired from the camera 140.
  • Light source 100 is typically placed on the side of touch detection area 120. In the illustrated embodiment, the light source 100 is placed only on one side of the touch detection area 120; in other embodiments, the light source 100 can be placed on two or three sides of the touch detection area 120.
  • the light source 100 includes an illuminator 102, a light guide 104, and a reflection plate 106.
  • the illuminator 102 is placed at the port 105 of the light guide body 104, and the reflection plate 106 is formed at the side 109 of the light guide body 104 away from the touch detection area 120.
  • the reflector 106 may be separate from the light guide 104.
  • Light emitted by the illuminator 102 is incident on the light guide 104 and transmitted within the light guide 104. A part of the light transmitted in the light guide body 104 is directly emitted from the side surface 1092 of the touch detection area 120 via the light guide 104, and is distributed on the touch detection area 120.
  • Another part of the transmitted light is reflected by the reflecting plate 106 (actually the reflecting surface 1064 of the surface guiding body 104) and then emitted by the light guiding body 104 near the side surface 1092 of the touch detecting area 120, and distributed in the touch detecting area 120 (eg Figure 1 shows the light rays 1-4).
  • the illuminator 102 may be a light emitting diode or a cold cathode fluorescent lamp, preferably an infrared light emitting diode.
  • the light guide body 104 may be one of light transmissive materials such as glass, optical fiber or acrylic.
  • the light guide body 104 may have various shapes such as a cylinder, a triangular prism, or a rectangular parallelepiped.
  • the side surface 1092 of the touch detection area 120 is a plane (for example, one side of a triangular prism or a rectangular parallelepiped light guide body), the plane is The angle of the touch detection area 120 is less than or equal to 90°, which can reduce unnecessary scattering of the detection light emitted through the light guide 104.
  • the side surface 1092 is not limited to a flat surface, but may be other types of surfaces, for example, the side surface 1092 is an uneven surface.
  • the reflector 106 can be any reflective device commercially available, such as a reflective strip, a flat mirror or a total reflection prism assembly.
  • the optical sensor can be one or a combination of a photoresistor, a photodiode, a phototransistor, a photocoupler, or a photovoltaic cell.
  • the manner in which the illuminator 102 is placed at the port of the light guide body 104 includes: a notch 1041 is formed at the port 105, and the illuminant 102 is placed in the notch as shown in FIG. In 1041.
  • the longitudinal section of the recess 1041 may be any shape such as a cone, an arc or a rectangle; the cross section of the recess 1041 may be any shape such as a circle, an ellipse, a square or a rectangle; the notch 1041 illustrated in FIG.
  • the longitudinal section is rectangular and the cross section is rectangular.
  • the illuminator 102 can be mechanically or adhesively bonded to the port 105 of the light guide (as shown in Figure 1).
  • a astigmatism film 1082 may be formed on the surface of the recess 1041, so that the uniformity of the light incident from the illuminator 102 into the light guide body 104 can be enhanced.
  • the number of the illuminants 102 may be one, two or more.
  • the illuminant 102 is placed at any port 105 of the light guide body 104; when the illuminant 102 is included in the light source 100, each illuminant 102 is respectively placed in the light guide The port of body 104.
  • two illuminants 102 are generally included in the light source 100.
  • the present invention is also described by way of example, and the related implementation of including one illuminant 102 in the light source 100 is described. The examples are not described.
  • the reflector 106 can be attached to the light guide 104. That is, the reflecting plate 106 may be attached to the side surface 109 of the light guiding body 104 away from the touch detection area 120 by mechanical bonding or adhesive bonding.
  • the touch screen includes: a light source 100, a touch detection area 120, and a camera 140 (in other embodiments, other optical sensors such as a camera, a camera, or an optical sensor may also be used. Unit) and control unit.
  • the light source 100 is used to illuminate the touch detection area 120
  • the camera 140 is configured to acquire touch data generated on the touch detection area
  • the control unit is coupled to the camera 140 and utilizes the image acquired from the camera 140. Touch the data to determine the touch location.
  • the light source 100 is placed on the side of the touch detection area 120. In the illustrated embodiment, the light source 100 is placed only on one side of the touch detection area 120; in other embodiments, the light source 100 can be placed on two or three sides of the touch detection area 120.
  • the light source 100 includes an illuminator 102, a light guide 104, a reflection plate 106, and a diffuser 108.
  • the illuminator 102 is disposed at the port 105 of the light guide body 104, and the reflector 106 is formed at a side 109 of the light guide body 104 away from the touch detection area 120.
  • the reflection plate 106 may be disposed separately from the light guide body 108.
  • the diffusing plate 108 is sandwiched between the reflecting plate 106 and the light guiding body 104.
  • a part of the light transmitted in the light guiding body 104 is directly emitted from the side surface 1092 of the touch detecting area 120 via the light guiding body 104 and distributed on the touch detecting area 120; another part of the light transmitted is transmitted through the diffusing plate 108.
  • the reflective plate 106 (actually facing the reflective surface 1064 of the light guide body 104) is reflected by the reflective plate 106 and then distributed through the diffusing plate and the light guide body to the touch detection area 120 (see FIG. 3).
  • Medium light 1-4 shows).
  • the diffusing plate 108 may be separated from the reflecting plate 106 or the light guiding body 104, or may be separated from the reflecting plate 106 and the light guiding body 104.
  • the diffuser 108 may also be attached to the reflector 106 and/or the light guide 104. That is, the diffusing plate 108 may be attached to the reflecting plate 106 and/or the side surface 109 of the light guiding body 104 away from the touch detecting area 120 by mechanical bonding or adhesive bonding.
  • the diffusing plate 108 can be any diffusing device commercially available as long as the light can be diverged.
  • the reflector 106 or the reflector 106 and the diffuser 108 may also cover the top surface 107 of the light guide 104 or cover the top surface 107 and the bottom surface 1072 at the same time.
  • the top surface means a side area of the light guide body 104 that is farthest from the plane of the touch detection area 120.
  • the bottom surface means that the light guide body 104 is opposite to the top surface.
  • Side Area. 4 shows an example in which the reflecting plate 106 and the diffusing plate 108 simultaneously cover the top surface 107 and the bottom surface 1072 of the light guiding body 104.
  • the light guide body 104 has a rectangular cross section at this time.
  • the covering of the top surface and/or the top surface of the light guide by the reflecting plate 106 or the reflecting plate 106 together with the diffusing plate 108 can reduce unnecessary scattering of the detection light emitted through the light guiding body 104.
  • the reflector 106 covers the top surface of the light guide 104 and the diffuser 108 covers only the side of the light guide 104 close to the reflector.
  • the selection of the illuminator 102, the light guide 104 and the reflector 106, and the positional relationship between the illuminator 102 and the light guide 104 can be The same as that described in the first embodiment of the touch screen, and details are not described herein again.
  • the touch screen comprises: a light source 100, a touch detection area 120, and a camera 140 (in other embodiments, other optical sensors such as a camera, a camera or an optical sensor) Unit) and control unit.
  • the light source 100 is used to illuminate the touch detection area 120.
  • the camera 140 is configured to acquire touch data generated on the touch detection area 120.
  • the control unit is coupled to the camera 140 and utilizes the location acquired from the camera 140. The touch data determines the touch location.
  • the light source 100 is placed on the side of the touch detection area 120. In the illustrated embodiment, the light source 100 is placed only on one side of the touch detection area 120; in other embodiments, the light source 100 can be placed on two or three sides of the touch detection area 120.
  • the light source 100 includes an illuminator 102, a light guide 104, and a reflective film 1062.
  • the illuminant 102 is disposed at the port 105 of the light guide body 104, and the reflective film 1062 is attached to the side surface 109 of the light guide body 104 away from the touch detection area 120.
  • Light emitted by the illuminator 102 is incident on the light guide 104 and transmitted within the light guide 104.
  • a portion of the light transmitted within the light guide 104 exits directly through the light guide 104 near the side 1092 of the touch detection area 120 and is distributed over the touch detection area 120.
  • another part of the transmitted light is reflected by the reflective film 1062, and then exits the side surface 1092 of the touch detection area 120 through the light guide 104 and is distributed in the touch detection area 120 (such as the light in FIG. 5). 1-4)).
  • the manner in which the reflective film 1062 is attached to the side surface 109 of the light guide body 104 away from the touch detection area 120 includes: attaching to the guide by mechanical bonding or adhesive bonding.
  • the light body 104 is away from the side surface 109 of the touch detection area 120 (in this case, the reflective film 1062 may be a reflective strip or a reflective sheet), or formed on the light guide by spraying, electroless plating or sputtering.
  • the body 104 is away from the side 109 of the touch detection area 120 (in this case, the material form of the material for forming the reflective film 1062 may be a chemical solution or a solid particle).
  • the reflective film 1062 can also be embedded in the side of the light guide 104 away from the touch detection area 120.
  • the term "embedded in” means that a part of the material of the light guide 104 is consumed when the reflective film 1062 is formed, that is, the reflective film 1062 is embedded in the light guide 104.
  • the light source further includes a diffusing film via which the reflective film 1062 is attached or embedded in the light guide 104 away from the side 109 of the touch detection area 120.
  • a portion of the light transmitted in the light guide body 104 is directly emitted from the side surface 1092 of the touch detection area 120 via the light guide 104, and is distributed in the touch detection area 120.
  • the other part of the transmitted light reaches the reflective film 1062 via the astigmatism film, is reflected by the reflective film 1062, and then exits through the astigmatism film and the light guide 104, and then exits from the light exit surface 1092. At this time, the astigmatism film is sandwiched between the reflective film 1062 and the side surface 109.
  • the astigmatism film is attached to the side surface 109 before the reflective film 1062.
  • the astigmatism film may be attached to the side surface 109 by mechanical bonding or adhesive bonding (at this time, the astigmatism film may be an astigmatism strip or a astigmatism sheet, and has good light transmittance), or, by spraying, Electroless plating or sputtering is formed on the side surface 109 (in this case, the material form of the material for forming the astigmatism film may be a chemical solution or a solid particle).
  • the astigmatism film is embedded in the side surface 109 before the reflective film 1062.
  • the astigmatism film is embedded in the light guide body 104, and the reflection film 1062 is further embedded in the astigmatism film.
  • the reflective film 1062 or the reflective film 1062 and the astigmatism film may also cover a top surface or a top surface and a bottom surface of the light guide body 104.
  • the light transmitted in the light guide 104 passes through the diffused light film and the reflective film 1062, and then returns to the light guide 104, thereby reducing unnecessary scattering of the detection light emitted through the light guide 104.
  • the selection of the body 102 and the light guide 104, and the positional relationship between the illuminator 102 and the light guide 104 can be the same as those described in the first embodiment of the touch screen; similar to the third embodiment of the touch screen
  • the selection of the reflective film 1062 is the same as that described in the third embodiment of the touch screen, and details are not described herein again.
  • a light-scattering substance e.g., a diffusing plate or a diffusing film
  • the relationship between the astigmatism substance and the reflecting unit is not limited to the manner defined in the above embodiment.
  • a reflective film may be attached to the diffusing plate
  • a diffusing film may be attached to the reflecting plate
  • a diffusing film may be interposed between the reflecting plate and the side of the light guiding body remote from the touch detecting area.
  • the designer of the present invention believes that the structure of the side of the light guiding body that approaches or carries the reflecting unit such as the reflecting plate 106 or the reflecting film 1062 can be designed so that when the reflecting plate 106 is formed at the side surface 109, the direction can be changed.
  • the angle of the light of the reflecting plate 106 adjusts the effect of light emission; or, when the reflecting film 1062 is attached or embedded in the side surface 109, the effect of light emission can be adjusted by changing the shape of the reflecting film 1062.
  • Both of the above designs have the potential to enhance the uniformity of light distributed over the touchscreen touch detection area 120.
  • the structural improvement of the side surface 109 of the light guide body 104 remote from the touch detection area 120 can constitute a more embodiment of the touch screen of the present invention.
  • the structure of the light guide 104 will be described.
  • the light guide body 104 is taken as a cylinder, and the light guide is cut in the longitudinal direction of the light guide body 104, that is, in the direction of xx.
  • the cut surface obtained when the body 104 is obtained (for this premise, the subsequent touch screen embodiment is the same as this example, and will not be described again), and the side 109 of the light guide body 104 remote from the touch detection area 120 includes at least two inclined surface groups.
  • Each bevel set includes two ramps 1042 and 1044 having an included angle 1043.
  • Each bevel group is arranged in series. Adjacent sets of bevels may have the same angle 1043.
  • the tip of the angle 1043 may be located on or within the boundary of the light guide body 104 when the set of slopes is not formed. When located within the boundary, more light is reflected through the set of bevels, and the effect of improving the uniformity of the hook is more pronounced, and space is also saved when the tip of the included angle 1043 is outside the boundary.
  • the light source 100 can include An illuminator 102 is disposed at a port 105 of the light guide body 104. At this time, the angle 1043 of each bevel group may be gradually decreased from the port 105 close to the illuminator 102 to the port 105 remote from the illuminator 102.
  • the light source 100 can also include two illuminants 102 that are respectively placed at the two ports 105 of the light guide body 104. At this time, the angle 1043 of each bevel group may be gradually decreased from the port 105 to the center of the light guide 104.
  • each bevel group can be equal.
  • the height of the bevel set means the vertical distance from the end of the angle 1043 to the line connecting the other ends of the two bevels 1042 and 1044 in the set of bevel groups.
  • the height of each slant group may be gradually increased from the port 105 adjacent to the illuminator 102 to the port 105 remote from the illuminator 102; when the light source 100 includes two illuminators 102, each slant The height of the group may gradually increase from the port 105 to the center of the light guide 104.
  • the side surface 109 of the light guide body 104 remote from the touch detection area 120 includes at least two curved surfaces 1046.
  • Each of the curved faces 1046 is continuously arranged, and the adjacent curved faces 1046 may have the same arc length and curvature.
  • the top end of the curved surface 1046 may be located on or within the boundary of the light guide body 104 when the curved surfaces 1046 are not formed. When located within the boundary, more light is reflected through each of the curved faces 1046, and the effect of improving the uniformity is more pronounced, and space is also saved when the tip of the curved face 1046 is outside the boundary.
  • the illuminant 102 is placed at a port 105 of the light guide 104.
  • the arc may be gradually decreased from the port 105 adjacent to the illuminator 102 to the port 105 remote from the illuminator 102; if each of the curved faces 1046 has the same arc, The arc length may be gradually reduced from a port 105 adjacent to the illuminator 102 to a port 105 remote from the illuminator 102.
  • the two illuminants 102 are respectively placed at the two ports 105 of the light guide 104.
  • the curvature thereof gradually increases from the port 105 of the light guiding body 104 to the center; or, if each curved surface 1046 has the same curvature, and its arc length gradually decreases from the port 105 to the center of the light guide 104.
  • the top ends of the curved faces 1046 may not be in a straight line.
  • the side 109 of the light guide body 104 remote from the touch detection area 120 includes at least two rectangular sections 1048.
  • Each rectangular section 1048 is continuously arranged, and the distance between adjacent rectangular sections 1048 can be equal.
  • the distance between the rectangular sections 1048 means a large separation between the opposite sides of the adjacent rectangular sections 1048.
  • each rectangular section 1048 may be located on or within the boundary of the light guide body when each rectangular section 1048 is not formed. When located within the boundary, more light is reflected through each rectangular section 1048, and the effect of improving the uniformity is more pronounced, and space is also saved when the top end of the rectangular section 1048 is outside the boundary.
  • the illuminator 102 when the light source 100 includes an illuminator 102, the illuminator 102 is placed in a port 105 of the light guide 104. At this time, the distance between adjacent rectangular sections 1048 may be gradually reduced from the port 105 adjacent to the illuminator 102 to the port 105 remote from the illuminator 102.
  • the light source 100 includes two illuminators 102, the two illuminants 102 are placed at the two ports 105 of the light guide 104, respectively. At this time, the distance between adjacent rectangular sections 1048 is gradually decreased from the port 105 to the center of the light guide 104.
  • each rectangular section 1048 can be equal.
  • the height of each rectangular section 1048 may be gradually increased from the port 105 adjacent to the illuminator 102 to the port 105 remote from the illuminator 102; when the light source 100 includes two illuminants 102, each The height of the rectangular section 1048 can be gradually increased from the port 105 to the center of the light guide 104.
  • the light guide body 104 is remotely touch-detected.
  • the side 109 of the region 120 can be a plane 1140, and the angle between the plane 1140 and the touch detection zone 120 is less than 90 degrees. This reduces the probability of unwanted scattering of light.
  • the guide is cut in the cross-sectional direction of the light guide body 104, that is, in the yy' direction.
  • the cut surface obtained when the light body 104 is obtained (for this premise, the subsequent touch screen embodiment is the same as this example, and will not be described again), and the side surface 109 of the light guide body 104 remote from the touch detection area 120 includes at least two inclined surface groups.
  • Each bevel set includes two bevels 1142 and 1144 having an included angle 1143.
  • Each bevel group is continuously arranged, and adjacent bevel groups may have the same angle 1143.
  • the tip end of the included angle 1143 may be located on or within the boundary of the light guide body 104 when the bevel group is not formed. When located within the boundary, more light is reflected through the bevel set, and the effect of improving the uniformity is more pronounced, and space is also saved when the tip of the included angle 1143 is outside the boundary.
  • the heights of the sets of bevels may be equal.
  • the angle 1143 of each bevel group may be gradually reduced from both sides to the center of the side.
  • the height of each bevel group may gradually increase from both sides to the center of the side.
  • the lines parallel to the slopes 1142 and 1144 are also parallel to the touch detection area 120.
  • the side surface 109 of the light guide body 104 remote from the touch detection area 120 includes at least two curved faces 1146.
  • the arcuate faces 1146 are consecutively arranged, and adjacent arcuate faces 1146 can have the same arc length and curvature.
  • the top end of the curved surface 1146 may be located on or within the boundary of the light guide body 104 when the curved surfaces 1146 are not formed. When located within the boundary, more light is reflected through each of the curved faces 1146, and the effect of improving its uniformity is more pronounced, and space is also saved when the tip end of the curved face 1146 is outside the boundary.
  • the curvature of each of the curved faces 1146 having the same arc length may be gradually decreased from both sides to the center of the side faces; or, each of the curved faces 1146 having the same curvature
  • the arc length can be gradually reduced from both sides to the center of the side. at this time,
  • the top ends of the curved faces 1146 may not be in a straight line.
  • a straight line parallel to the central axis of each curved surface 1146 is also parallel to the touch detection area 120.
  • each curved surface 1146 having the same arc or increasing the curvature of each curved surface 1146 having the same arc length can make the light guide
  • the light transmitted within the body 104 increases the chance of being reflected, which enhances the uniformity of the light distributed over the touch detection area.
  • the side 109 of the light guide body 104 remote from the touch detection area 120 includes at least two rectangular sections 1148.
  • Each rectangular section 1148 is continuously arranged, and the distance between adjacent rectangular sections 1148 can be equal.
  • the distance between the rectangular sections 1148 means the distance between the opposite sides of the adjacent rectangular sections 1148.
  • the top end of each rectangular section 1148 may be located on or within the boundary of the light guide body 104 when the rectangular section 1148 is not formed. When located within the boundary, more light is reflected through each of the rectangular sections 1148, and the effect of improving the uniformity is more pronounced, and space is also saved when the top end of the rectangular section 1148 is outside the boundary.
  • the distance between adjacent rectangular cross-sections 1148 may gradually decrease from both sides to the center of the sides.
  • the height of each rectangular section 1148 can be equal.
  • the height of each rectangular section 1148 can also be gradually increased from both sides to the center of the side.
  • a straight line parallel to the central axis of each rectangular section 1148 is also parallel to the touch detection area 120.
  • the designer of the present invention analyzes that reducing the distance between adjacent rectangular sections 1148, or increasing the height of the rectangular section 1148, can increase the amount of light transmitted in the light guide body 104 to be reflected. The opportunity to enhance the uniformity of light distributed over the touch detection area.
  • the present invention also provides a touch system comprising the above touch screen, and the touch system may be a touch display formed by mounting the touch screen on a display surface.
  • the invention also provides a light source.
  • the light source comprises an illuminant, a light guide and a reflector, the illuminator is disposed at a port of the light guide, and the reflector is formed at a side of the light guide .
  • the reflector and the light guide may be separated. A portion of the light transmitted is emitted directly through the side of the light guide away from the reflector. Another portion of the light transmitted in the light guide body is reflected by the reflecting plate (actually a reflecting surface facing the light guiding body), and then exits through the side surface of the light guiding body away from the reflecting plate.
  • the illuminant may be a light emitting diode or a cold cathode fluorescent lamp, preferably an infrared light emitting diode.
  • the light guiding body may be one of a light transmissive material such as glass, optical fiber or acrylic.
  • the light guiding body may be in various shapes such as a cylinder, a triangular prism or a rectangular parallelepiped. Wherein, when the side of the light guiding body away from the reflecting plate (ie, the light exiting surface) is a plane (for example, one of a triangular prism or a rectangular parallelepiped light guiding body), the plane and the light are emitted.
  • the angle of the face is less than 90°, which reduces unnecessary scattering of the detection light emitted through the light guide.
  • the side surface is not limited to a flat surface, but may be other types of surfaces, for example, the side surface is an uneven surface.
  • the reflector may be any reflective device commercially available, such as a reflective strip, a flat mirror or a total reflection prism assembly.
  • the manner in which the illuminant is placed at the port of the light guide body includes: forming a notch at the port, and placing the illuminant in the notch.
  • the longitudinal section of the recess may be any shape such as a cone, an arc or a rectangle; the cross section of the recess may be any shape such as a circle, an ellipse, a square or a rectangle.
  • the illuminant may be attached to the port of the light guide by mechanical or adhesive bonding.
  • a astigmatism film may be formed on the surface of the recess, so that the uniformity of light rays incident on the light guide by the illuminant can be enhanced.
  • the number of the illuminants may be one, two or more. Only included in the light source In the case of one illuminator, the illuminant is placed at any port of the light guide; when the illuminator includes two illuminants, each illuminant is placed at a port of the light guide. In order to enhance the brightness of the light emitted by the light source, two illuminants are generally included in the light source. The present invention is also described by way of example, and the related embodiments including one illuminant in the light source are not described herein.
  • the reflector can be attached to the light guide. That is, the reflecting plate may be attached to the side surface of the light guiding body by mechanical bonding or adhesive bonding.
  • the light source comprises an illuminant, a light guide, a reflector and a diffuser.
  • the illuminator is placed at a port of the light guide, and the reflector is formed at a side of the light guide.
  • the reflector and the light guide may be separately disposed, and the diffuser is sandwiched between the reflector and the light guide. A portion of the light transmitted within the light guide body exits directly from the side of the light guide body remote from the reflector.
  • Another portion of the light transmitted in the light guiding body reaches the reflecting plate (actually a reflecting surface facing the light guiding body) via the diffusing plate, is reflected by the reflecting plate, and then passes through the diffusing plate and the guide The light body is emitted from a side of the light guide that is away from the reflector.
  • the astigmatism plate may be separated from the reflector or the light guide, or may be separated from the reflector and the light guide.
  • the diffuser plate may also be attached to the reflector and/or the light guide. That is, the diffusing plate may be attached to the side surface of the reflecting plate and/or the light guiding body by mechanical bonding or adhesive bonding.
  • the diffusing plate may be any diffusing device commercially available as long as the light is diverged.
  • the reflecting plate or the reflecting plate and the diffusing plate may cover a top surface or a top surface and a bottom surface of the light guiding body.
  • the top surface means a side area opposite to the placement surface when the light guide body is placed in the longitudinal direction thereof;
  • the bottom surface means a placement surface when the light guide body is placed along the longitudinal direction thereof A side surface of the side surface of the light guide body which is appropriately extended by the placement surface. The above coverage can reduce unnecessary scattering of the detection light emitted through the light guide.
  • the selection of the illuminant, the light guide and the reflector, and the positional relationship between the illuminator and the light guide may be the first with the light source.
  • the light source comprises an illuminant, a light guide and a reflective film.
  • the illuminant is placed at a port of the light guide, and the reflective film is attached to a side surface of the light guide.
  • a part of the light transmitted in the light body is directly emitted from the side of the light guide body away from the reflective film.
  • Another portion of the light transmitted in the light guide body is reflected by the reflective film and then exits through a side of the light guide body remote from the reflective film.
  • the manner in which the reflective film is attached to the side surface of the light guide body includes: attaching to the side surface of the light guide body by mechanical bonding or adhesive bonding (in this case, the reflective film may be a reflective strip) Or a reflective sheet), or formed on the side of the light guide body by spraying, electroless plating or sputtering (in this case, the material form of the material for forming the reflective film may be a chemical solution or a solid particle) .
  • the reflective film may also be embedded in the side of the light guide.
  • embedded in means that a portion of the light guide material is consumed when the reflective film is formed, that is, the reflective film is embedded in the light guide.
  • the light source further includes a diffusing film via which the reflective film is attached or embedded in the side of the light guiding body. a part of the light transmitted in the light guide body is directly emitted from the side of the light guide body away from the reflective film; and another part of the light transmitted in the light guide body reaches the reflective film via the light diffusing film, After the reflection film is reflected, it is emitted from the light exit surface via the astigmatism film and the light guide. At this time, the astigmatism film is sandwiched between the reflective film and the side surface. When the reflective film is attached to the side surface via the astigmatism film, the astigmatism film is attached to the side surface before the reflective film.
  • the astigmatism film may be attached to the side surface by mechanical bonding or adhesive bonding (in this case, the astigmatism film may be an astigmatism strip or a astigmatism sheet and has good light transmittance), or, by spraying, chemistry
  • a plating or sputtering method is formed on the side surface (in this case, a material form of a material for forming the astigmatism film may be a chemical solution or a solid particle).
  • the reflective film or the reflective film and the astigmatism film may also cover a top surface of the light guide.
  • Light transmitted in the light guide body is attached or embedded in a top surface of the light guide body
  • the reflective film or the astigmatism film and the reflective film are returned to the light guide body, thereby reducing unnecessary scattering of the detection light emitted through the light guide body.
  • the selection of the illuminant and the light guide body, and the positional relationship between the illuminant and the light guide body may be the same as the light source The same as described in an embodiment.
  • the selection of the reflective film is the same as that described in the third embodiment of the light source and will not be described herein.
  • the relationship between the astigmatism substance and the reflecting unit is not limited to the manner defined in the above embodiment.
  • the reflective film may be attached to the diffusing plate
  • the diffusing film may be attached to the reflecting plate
  • a diffusing film may be interposed between the reflecting plate and the side of the light guiding body remote from the touch detecting area.
  • the designer of the present invention believes that the structure of the side of the light guiding body that is close to or carries the reflecting unit such as the reflecting plate and the reflecting film can be designed, so that when the reflecting plate is formed at the side surface, the reflecting plate can be changed by changing The angle of the light modulates the effect of the light emission; or, when the reflective film is attached or embedded on the side surface, the effect of light emission can be adjusted by changing the shape of the reflective film. All of the above designs enhance the uniformity of the light emitted by the light source.
  • the light guide body is taken as a cylinder, and the cut surface obtained when the light guide body is cut in the direction of xx as shown in FIG. 6 is taken in the longitudinal direction of the light guide body.
  • the side of the light guiding body near or the 7-load reflecting unit includes at least two inclined surface groups.
  • Each bevel set includes two bevels having an included angle.
  • Each bevel group is continuously arranged, and adjacent bevel groups may have the same angle.
  • the tip end of the angle may be located on or within a boundary of the light guide body when the set of slopes is not formed. When located within the boundary, more light is reflected through the set of bevels, and the effect of improving the uniformity is more pronounced, and space is also saved when the tip of the included angle is outside the boundary.
  • the light source can include a An illuminant, the illuminator being placed at a port of the light guide. At this time, the angle of each bevel group may be gradually decreased from a port close to the illuminator to a port remote from the illuminator.
  • the light source may also include two illuminants, two illuminators being respectively placed at the two ports of the light guide. At this time, the angle of each bevel group may gradually decrease from the port to the center of the light guide.
  • each bevel group can be equal.
  • the height of the set of bevels means the vertical distance from the end of the angle to the line connecting the other ends of the two bevels in the set of bevels.
  • the height of each slant group may be gradually increased from a port close to the illuminator to a port remote from the illuminant; when the light source comprises two illuminants, the height of each bevel group may be guided by the light guide The port's port to center gradually increases.
  • the side of the light guiding body near or the side of the 7-load reflecting unit includes at least two curved faces.
  • Each arc surface is continuously arranged, and adjacent arc surfaces may have the same arc length and curvature.
  • the top end of the curved surface may be located on or within the boundary of the light guide body when each of the curved surfaces is not formed. When located within the boundary, more light is reflected through each curved surface, and the effect of improving the uniformity is more obvious, and space is also saved when the top end of the curved surface is outside the boundary.
  • the illuminant when the light source comprises an illuminant, the illuminant is placed at a port of the light guide. At this time, if each arc surface has the same arc length, the arc may be gradually decreased from a port close to the illuminator to a port remote from the illuminator; if each arc surface has the same arc, the arc length may be close to The port of the illuminator is gradually reduced to a port remote from the illuminant.
  • the light source comprises two illuminants
  • the two illuminants are respectively placed at the two ports of the light guide.
  • each arc surface has the same arc length
  • the arc is gradually increased from the port to the center of the light guide body; or, if each arc surface has the same arc, the arc length is determined by the light guide body.
  • the port to the center gradually decreases.
  • the tops of the arc faces may not be in a straight line.
  • the side of the light guide body adjacent to or carrying the reflection unit comprises at least two rectangular sections. Each rectangular section is continuously arranged, and the distance between adjacent rectangular sections may be equal. Wherein, the distance between the rectangular cross sections means the distance between the opposite side faces between adjacent rectangular sections.
  • each rectangular section may be located on or within the boundary of the light guide body when each rectangular section is not formed. When located within the boundary, more light is reflected through each rectangular section, and the effect of improving the uniformity is more pronounced, and space is also saved when the tip of the rectangular section is outside the boundary.
  • the illuminant when the light source comprises an illuminant, the illuminant is placed at a port of the light guide. At this time, the distance between adjacent rectangular sections may be gradually reduced from a port close to the illuminator to a port remote from the illuminator.
  • the light source comprises two illuminants
  • the two illuminants are respectively placed at the two ports of the light guide. At this time, the distance between the adjacent rectangular sections gradually decreases from the port to the center of the light guide.
  • each rectangular section may be equal.
  • the height of each of the rectangular sections may be gradually increased from a port adjacent to the illuminator to a port remote from the illuminator.
  • the height of each rectangular section may gradually increase from the port to the center of the light guide.
  • the designer of the present invention believes that reducing the distance between adjacent rectangular sections, or increasing the height of the rectangular section, can increase the chance of light transmitted in the light guide body being reflected, which is beneficial to the opportunity. Enhances the uniformity of the light emitted by the light source.
  • the side of the light guide body adjacent to or carrying the reflective unit may be planar, and the angle of the plane to the light exit surface is less than 90°. This reduces the probability of unnecessary scatter of light.
  • the side of the light guiding body that is close to or carrying the reflecting unit includes at least two inclined surface groups.
  • Each bevel set includes two bevels having an included angle.
  • Each bevel group is continuously arranged, and adjacent bevel groups may have the same angle. among them,
  • the tip of the included angle may be located on or within a boundary of the light guide when the set of slopes is not formed. When located within the boundary, more light is reflected through the set of bevels, and the effect of improving its uniformity is more pronounced, and space is also saved when the tip of the included angle is outside the boundary.
  • the heights of the sets of bevels may be equal.
  • the angle of each bevel group can also be gradually reduced from both sides to the center of the side.
  • the height of each bevel group may gradually increase from both sides to the center of the side.
  • the line parallel to each bevel is also parallel to the axis of the light guide.
  • the side of the light guide body near or the side of the 7-loaded reflection unit includes at least two curved faces.
  • Each arc surface is continuously arranged, and adjacent arc surfaces may have the same arc length and curvature.
  • the top end of the curved surface may be located on or within the boundary of the light guide body when each curved surface is not formed. When located within the boundary, more light is reflected through each curved surface, and the effect of improving the uniformity is more obvious, and space is also saved when the top end of the curved surface is outside the boundary.
  • the arc may gradually decrease from two sides to the center of the side surface; if each arc surface has the same arc, Then the arc length can be gradually reduced from both sides to the center of the side. At this time, the top ends of the arc faces may not be in a straight line.
  • the straight line parallel to the central axes of the respective arc faces is also parallel to the axis of the light guide.
  • the side of the light guide body adjacent to or carrying the reflection unit comprises at least two rectangular sections.
  • Each rectangular section is continuously arranged, and the distance between adjacent rectangular sections may be equal.
  • the distance between the rectangular cross sections means a large separation between opposite side faces between adjacent rectangular sections.
  • the top of each rectangular section can be located The boundary or the boundary in the case where the rectangular cross sections are not formed in the light guide body. When located within the boundary, more light is reflected through each rectangular section, and the effect of improving the uniformity is more obvious, and space is also saved when the tip of the rectangular section is outside the boundary.
  • the distance between adjacent rectangular cross-sections may gradually decrease from both sides to the center of the side.
  • the height of each rectangular section may be equal.
  • the height of each rectangular section may also gradually increase from both sides to the center of the side.
  • the line parallel to the central axis of each rectangular section is also parallel to the axis of the light guide.
  • the designer of the present invention believes that reducing the distance between adjacent rectangular sections, or increasing the height of the rectangular section, can increase the chance of light transmitted in the light guide body being reflected, which is beneficial to the opportunity. Enhances the uniformity of the light emitted by the light source.
  • structural improvements to the side surface of the light guide body may be equally applied to the reflection plate.
  • the structural modification of the reflecting surface, on which the inclined surface group, the curved surface, the rectangular cross section or the plane described in the foregoing embodiment is formed can still constitute an embodiment of the light source, and the combination of the embodiment and the foregoing embodiment Embodiments that can still constitute a light source will not be described again.
  • the illuminant and the light guide are used to form the surface light source, and the uniformity of the light emitted by the surface light source is improved by the reflection unit based on the reflection principle, thereby enhancing the uniformity of the light.
  • a astigmatism film is attached or embedded at the port of the light guide body, which is also advantageous for enhancing the uniformity of the light incident on the light guide body by the illuminant.

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Description

一种触摸屏、 触摸系统及光源 技术领域
本发明涉及光电检测技术， 尤其涉及一种触摸屏、 触摸系统及光源。 背景技术
现有技术中， 使用光电技术进行触摸点检测的触摸屏主要有两种： 一 种是使用红外发射和接收管阵列构成红外线扫描网格的红外触摸屏； 另一 种是使用摄像头等光学传感单元作为检测元件的光学触摸屏。
其中， 在上述光学触摸屏中需要提供光源， 以为光学传感单元提供检 测光线。 所述光源发出的光线分布于触摸面板的触摸检测区上， 光学传感 单元用以获取发生于所述触摸检测区上的触摸数据。
随着材料的改良及其在应用上的进步， 各种不同形态的光源也伴随着 不同的需求而被开发、 改良， 大体上都是向节省能源、 增进亮度的方向发 展。
然而， 实践中发现， 尽管在进行光源改良后， 包含所述光源的触摸屏 在绝大多数工作条件下运行良好， 但是， 在光学传感单元 （如摄像头） 的 帧频较高时， 检测环境的少许变化都可能影响到光学传感单元对触摸的判 断。 换言之， 在光学传感单元的帧频较高时， 检测结果的可靠性较差。 因 此， 当前， 业界普遍致力于如何改善检测环境的稳定性， 具体地， 例如， 如何增强光源照射的均匀性。
但是， 实践中发现， 应用现有的技术方案增强光线均匀性时， 实际效 果仍然有待改善。 因此， 业界需要一种新的可增强光线均匀性的技术方案。 发明内容
针对现有技术中存在的问题， 本发明提供了一种触摸屏， 利于增强分 布于其内触摸检测区上的光线的均匀性； 本发明提供了一种触摸系统， 利 于增强分布于其内触摸屏中触摸检测区上的光线的均匀性； 本发明提供了 一种光源， 利于增强由其发出的光线的均匀性。
本发明第一方面提供了一种光源， 包括发光体、 导光体和反射单元， 所述发光体置于所述导光体的端口， 所述反射单元形成于所述导光体的侧 所述导光体内传输的部分光线经所述反射单元反射后由所述导光体内远离 所述反射单元的侧面射出。
可选地， 所述反射单元为反射板或反射膜； 所述反射板与所述导光体 分立或附着于所述导光体的侧面， 所述反射板中面向所述导光体的侧面形 成有反射面； 所述反射膜附着或嵌入于所述导光体的侧面。
可选地，所述反射面及 /或所述导光体内靠近所述反射单元的侧面包括 至少两个斜面组， 各所述斜面组包括具有夹角的两斜面， 各所述斜面组连 续排列； 相邻的所述斜面组具有相同的夹角， 或者， 所述斜面组沿所述导 的端口至中心逐渐减小， 所述斜面组沿所述导光体的横切面方向时， 各所 述斜面组的夹角由所述导光体内靠近所述反射单元的侧面及 /或所述反射 面的两边至中心逐渐减小。
可选地， 各所述斜面组等高， 或者， 所述斜面组沿所述导光体的纵切 面方向时，各所述斜面组的高度由所述导光体及 /或所述反射板的端口至中 心逐渐增大， 所述斜面组沿所述导光体的横切面方向时， 各所述斜面组的 中心逐渐增大。
可选地，所述反射面及 /或所述导光体内靠近所述反射单元的侧面包括 至少两个弧面， 各所述弧面连续排列； 相邻的所述弧面具有相同的弧长和 弧度； 或者， 各所述弧面沿所述导光体的纵切面方向时， 若各弧面具有相 同弧长， 则其弧度由所述导光体及 /或所述反射板的端口至中心逐渐增大， 若各弧面具有相同弧度，则其弧长由所述导光体及 /或所述反射板的端口至 中心逐渐减小； 各所述弧面沿所述导光体的横切面方向时， 若各弧面具有 相同弧长，则其弧度由所述导光体内靠近所述反射单元的侧面及 /或所述反 射面的两边至中心逐渐增大； 若各弧面具有相同弧度， 则其弧长由所述导 可选地，所述反射面及 /或所述导光体内靠近所述反射单元的侧面包括 至少两个矩形断面， 各所述矩形断面连续排列； 相邻的所述矩形断面间的 距离相等， 或者， 各所述矩形断面沿所述导光体的纵切面方向时， 相邻的 所述矩形断面间的距离由所述导光体及 /或所述反射板的端口至中心逐渐 减小； 各所述矩形断面沿所述导光体的横切面方向时， 相邻的所述矩形断 面间的距离由所述导光体内靠近所述反射单元的侧面及 /或所述反射面的 两边至中心逐渐减小。
可选地， 各所述矩形断面等高， 或者， 各所述矩形断面沿所述导光体 的纵切面方向时，各所述矩形断面的高度由所述导光体及 /或所述反射板的 端口至中心增大； 各所述矩形断面沿所述导光体的横切面方向时， 各所述 矩形断面的高度由所述导光体内靠近所述反射单元的侧面及 /或所述反射 面的两边至中心逐渐增大。
可选地，所述反射面及 /或所述导光体内靠近所述反射单元的侧面为平 面， 且所述平面与光线发射面间的夹角小于 90度。
可选地， 所述反射单元覆盖所述导光体的顶面和底面。
可选地， 所述光源还包括散光物质， 所述散光物质位于所述反射单元 和所述导光体之间， 在所述导光体内传输的部分光线经所述散光物质到达 远离所述反射单元的侧面射出。
可选地， 所述发光体为发光二极管或冷阴极荧光灯。
可选地， 所述导光体为玻璃、 光纤或亚克力中的一种。
可选地， 在所述导光体的端口处附着或嵌入有散光物质， 所述发光体 本发明第二方面提供了一种触摸屏， 包括触摸检测区； 光学传感单元， 用以获取发生于所述触摸检测区上的触摸数据； 控制单元， 耦接于所述光 学传感单元并利用从所述光学传感单元获取的所述触摸数据确定触摸位 置； 以及， 根据本发明第一方面的光源， 所述光源置于所述触摸检测区的 至少一个侧边， 并且其中导光体的形成有反射单元的侧面远离所述触摸检 测区。
本发明第三方面提供了一种触摸系统， 包括上述触摸屏。
与现有技术相比， 本发明提供的光源、 触摸屏和触摸系统具有如下优 点：
本发明提供的一种光源，通过调整所述光源的结构，使其包括发光体、 导光体和反射单元， 并将所述发光体置于所述导光体的端口， 所述反射单 元形成于所述导光体的侧面处， 使所述发光体发出的光线射入所述导光体 并在所述导光体内传输， 其中部分光线再经由所述反射单元反射后由所述 导光体内远离所述反射单元的侧面射出； 即， 先利用所述发光体和导光体 构成面光源， 再基于反射原理利用所述反射单元提高由所述面光源发出的 光线的均匀性， 由此增强由其发出的光线的均匀性。
本发明提供的一种光源，通过设计所述反射板内反射面及 /或所述导光 体的侧面的结构（如， 在所述导光体的纵切面及 /或横切面方向上， 使所述 侧面及 /或所述反射面包括至少两个斜面组、 弧面或矩形断面； 或者， 直接 使所述侧面为斜面） ， 使得在将反射板形成于所述侧面处时， 可通过改变 射向所述反射板的光线的角度调整光线发射的效果； 或者， 在将反射膜附 着或嵌入于所述侧面时， 可通过改变所述反射膜的形态调整光线发射的效 果； 如此均可增强由光源发出的光线的均匀性。
本发明提供的一种触摸屏， 通过调整光源结构， 使其包括发光体、 导 光体和反射单元， 并将所述发光体置于所述导光体的端口， 所述反射单元 形成于所述导光体内远离所述触摸检测区的侧面处， 使所述发光体发出的 光线射入所述导光体并在所述导光体内传输， 其中部分光线再经由所述反 射单元反射后分布于所述触摸检测区； 即， 先利用所述发光体和导光体构 成面光源， 再基于反射原理利用所述反射单元提高由所述面光源发出的光 线的均匀性， 从而增强分布于所述触摸检测区上的光线的均匀性；
本发明提供的一种触摸屏，通过设计所述反射板内反射面及 /或所述导 光体内远离所述触摸检测区的侧面的结构（如， 在所述导光体的纵切面及 / 或矩形断面； 或者， 直接使所述侧面为斜面） ， 使得在将反射板形成于所 述侧面处时， 可通过改变射向所述反射板的光线的角度调整光线发射的效 果； 或者， 在将反射膜附着或嵌入于所述侧面时， 可通过改变所述反射膜 的形态调整光线发射的效果； 如此均可增强分布于所述触摸检测区上的光 线的均匀性；
本发明提供的一种触摸系统， 通过调整其内光源的结构， 使所述光源 包括发光体、导光体和反射单元， 并将所述发光体置于所述导光体的端口， 所述反射单元形成于所述导光体内远离所述触摸检测区的侧面处， 使所述 再经由所述反射单元反射后分布于所述触摸检测区； 即， 先利用所述发光 体和导光体构成面光源， 再基于反射原理利用所述反射单元提高由所述面 光源发出的光线的均匀性， 从而增强分布于其内触摸屏触摸检测区上的光 线的均匀性；
本发明提供的一种触摸系统， 通过设计置于其内光源中所述反射板内 反射面及 /或所述导光体内远离所述触摸检测区的侧面的结构（如， 在所述 导光体的纵切面及 /或横切面方向上， 使所述侧面及 /或所述反射面包括至 少两个斜面组、 弧面或矩形断面； 或者， 直接使所述侧面为斜面） ， 使得 在将反射板形成于所述侧面处时， 可通过改变射向所述反射板的光线的角 度调整光线发射的效果； 或者， 在将反射膜附着或嵌入于所述侧面时， 可 通过改变所述反射膜的形态调整光线发射的效果； 如此均可增强分布于其 内触摸屏触摸检测区上的光线的均匀性。 附图说明 图 1为本发明触摸屏第一实施例的结构示意图；
图 2 为本发明触摸屏第一实施例中发光体和导光体 口的结构剖视 图；
图 3为本发明触摸屏第二实施例的结构示意图；
图 4为本发明触摸屏实施例中导光体顶面的结构示意图；
图 5为本发明触摸屏第三实施例的结构示意图； 图 6为本发明触摸屏实施例中切割方向示意图；
图 7为本发明触摸屏第四实施例中导光体的纵剖面示意图；
图 8为本发明触摸屏第五实施例中导光体的纵剖面示意图；
图 9为本发明触摸屏第六实施例中导光体的纵剖面示意图；
图 10为本发明触摸屏第七实施例中导光体的横剖面示意图；
图 11为本发明触摸屏第八实施例中导光体的横剖面示意图；
图 12为本发明触摸屏第九实施例中导光体的横剖面示意图；
图 13为本发明触摸屏第十实施例中导光体的横剖面示意图。 具体实施方式 下面结合说明书附图和具体实施例对本发明作进一步的描述。
如图 1所示， 在本发明触摸屏第一实施例中， 触摸屏包括： 光源 100、 触摸检测区 120、 摄像头 140 (在其他实施例中， 还可为摄像机、 照相机或 光学传感器等其他光学传感单元） 和控制单元。 光源 100用于照亮触摸检 测区 120,摄像头 140用以获取发生于所述触摸检测区 120上的触摸数据。 控制单元耦接于摄像头 140, 并利用从摄像头 140获取的触摸数据确定触 摸位置。
光源 100通常被置于触摸检测区 120的侧边。 在图示实施例中， 光源 100仅置于触摸检测区 120的 1个侧边； 在其他实施例中， 光源 100可置 于触摸检测区 120的 2个或 3个侧边。
具体地， 光源 100包括发光体 102、 导光体 104和反射板 106。 发光体 102置于导光体 104的端口 105 ,反射板 106形成于导光体 104内远离触摸 检测区 120的侧面 109处。 反射板 106可以与导光体 104分立。 所述发光 体 102发出的光线射入所述导光体 104并在所述导光体 104内传输。 在导 光体 104内传输的一部分光线直接经由导光体 104靠近触摸检测区 120的 侧面 1092射出， 并分布于触摸检测区 120上。传输的另一部分光线则经由 反射板 106 (实际为面向导光体 104的反射面 1064 )反射后再通过导光体 104靠近触摸检测区 120的侧面 1092射出， 并分布于触摸检测区 120 (如 图 1中光线 1-4所示） 。
其中， 发光体 102可采用发光二极管或冷阴极荧光灯， 优选的为红外 发光二极管。 所述导光体 104可为玻璃、 光纤或亚克力等光透射材料中的 一种。 所述导光体 104可为圓柱体、 三棱柱或长方体等多种形状。 其中， 在导光体 104内靠近触摸检测区 120的侧面 1092 (筒称为光线出射面）为 平面时 （例如是三棱柱或长方体形状的导光体中的一个侧面） ， 使所述平 面与触摸检测区 120的夹角小于或等于 90° , 如此可减少经由导光体 104 发出的检测光线发生不必要的散射。但所述侧面 1092不仅限于平面，也可 为其它类型的表面， 例如侧面 1092 为凹凸不平的表面。 所述反射板 106 可为市场有售的任何反射装置， 如反射条、 平面镜或全反射棱镜组件等。 所述光学传感器可为光敏电阻、 光电二极管、 光电三极管、 光电耦合器或 光电池中的一种或其组合。
需说明的是， 将发光体 102置于导光体 104的端口的方式包括： 结合 图 2所示， 在所述端口 105处形成有凹口 1041 , 所述发光体 102置于所述 凹口 1041中。 其中， 凹口 1041的纵切面可为锥形、 弧形或矩形等任意形 状； 凹口 1041的横切面可为圓形、 橢圓形、 方形或矩形等任意形状； 图 2 中示例的凹口 1041的纵切面为矩形， 横切面也为矩形。 或者， 可以将发光 体 102以机械接合或胶粘接合的方式接于导光体的端口 105 (如图 1 中所 示） 。 其中， 在所述凹口 1041表面可形成有散光膜 1082, 如此可增强由 发光体 102射入导光体 104的光线的均匀性。
此外， 所述发光体 102的数目可为一个、 两个或多个。 光源 100中只 包括一个发光体 102时，发光体 102置于所述导光体 104的任一端口 105; 光源 100中包括两个发光体 102时，各发光体 102分别置于所述导光体 104 的端口。 为增强分布于触摸屏内触摸检测区上的光线的亮度， 通常在光源 100 中包括两个发光体 102, 本发明中也以此为例进行说明， 对光源 100 中包括一个发光体 102的相关实施例不作赘述。
在与触摸屏第一实施例相类似的其他实施例中， 反射板 106可附着于 导光体 104上。 即， 反射板 106可以机械接合或胶粘接合的方式附接于所 述导光体 104内远离触摸检测区 120的侧面 109。 结合图 3所示，在本发明触摸屏第二实施例中，触摸屏包括：光源 100、 触摸检测区 120、 摄像头 140 (在其他实施例中， 还可为摄像机、 照相机或 光学传感器等其他光学传感单元） 和控制单元。 光源 100用于照亮触摸检 测区 120, 摄像头 140用以获取发生于所述触摸检测区上的触摸数据， 所 述控制单元耦接于所述摄像头 140并利用从所述摄像头 140获取的所述触 摸数据确定触摸位置。
光源 100被置于触摸检测区 120的侧边。 在图示实施例中， 光源 100 仅置于触摸检测区 120的 1个侧边； 在其他实施例中， 光源 100可置于触 摸检测区 120的 2个或 3个侧边。
光源 100包括发光体 102、 导光体 104、 反射板 106和散光板 108。 所 述发光体 102置于所述导光体 104的端口 105 , 所述反射板 106形成于所 述导光体 104内远离所述触摸检测区 120的侧面 109处。 所述反射板 106 可以与所述导光体 108分立设置。 散光板 108夹于所述反射板 106和所述 导光体 104之间。 在所述导光体 104内传输的一部分光线直接经由导光体 104靠近触摸检测区 120的侧面 1092射出， 并分布于所述触摸检测区 120 上； 传输的另一部分光线经由所述散光板 108到达所述反射板 106 (实际 为面向所述导光体 104的反射面 1064 ) , 被反射板 106反射后再通过所述 散光板、 导光体分布于所述触摸检测区 120 (如图 3中光线 1-4所示） 。
其中， 所述散光板 108可与所述反射板 106或所述导光体 104分立， 也可与所述反射板 106及所述导光体 104均分立。
在与触摸屏第二实施例相类似的其他实施例中， 散光板 108还可附着 于反射板 106及 /或导光体 104上。 即， 所述散光板 108可以机械接合或胶 粘接合的方式附接于所述反射板 106及 /或所述导光体 104内远离触摸检测 区 120的侧面 109。 所述散光板 108可为市场有售的任何散光装置， 只要 可使光线发散即可。
特别地， 所述反射板 106或所述反射板 106及所述散光板 108还可覆 盖所述导光体 104的顶面 107或同时覆盖所述顶面 107及底面 1072。其中， 所述顶面意指距离所述触摸检测区 120 所在平面距离最远的所述导光体 104的侧面区域； 所述底面意指所述导光体 104中与所述顶面正对的侧面 区域。 图 4所示为所述反射板 106及所述散光板 108同时覆盖所述导光体 104的顶面 107和底面 1072的示例。 作为示例， 此时所述导光体 104的横 截面为矩形。 反射板 106或反射板 106连同散光板 108对导光体顶面和 / 或顶面的覆盖可以减少经由导光体 104 发出的检测光线发生不必要的散 射。 当然， 在与上述实施例相类似的其他实施例中， 可存在反光板 106覆 盖导光体 104的顶面而散光板 108仅覆盖导光体 104的靠近反光板的侧面 的情况。
此外， 触摸屏第二实施例及与其相类似的其他实施例中对于发光体 102、导光体 104及反射板 106的选取， 以及发光体 102与导光体 104之间 的位置关系， 均可与触摸屏第一实施例中所述的相同， 在此不再赘述。
如图 5所示， 在本发明触摸屏第三实施例中， 触摸屏包括： 光源 100、 触摸检测区 120、 摄像头 140 (在其他实施例中， 还可为摄像机、 照相机或 光学传感器等其他光学传感单元） 和控制单元。 光源 100用于照亮触摸检 测区 120,摄像头 140用以获取发生于所述触摸检测区 120上的触摸数据， 所述控制单元耦接于所述摄像头 140并利用从所述摄像头 140获取的所述 触摸数据确定触摸位置。
光源 100被置于触摸检测区 120的侧边。 在图示实施例中， 光源 100 仅置于触摸检测区 120的 1个侧边； 在其他实施例中， 光源 100可置于触 摸检测区 120的 2个或 3个侧边。
光源 100包括发光体 102、导光体 104和反射膜 1062。所述发光体 102 置于所述导光体 104的端口 105 , 所述反射膜 1062附着于所述导光体 104 内远离所述触摸检测区 120的侧面 109。 所述发光体 102发出的光线射入 所述导光体 104并在所述导光体 104内传输。 在导光体 104内传输的一部 分光线直接经由导光体 104靠近触摸检测区 120的侧面 1092出射，并分布 于所述触摸检测区 120上。 而传输的另一部分光线则经由所述反射膜 1062 反射后，再通过所述导光体 104靠近所述触摸检测区 120的侧面 1092出射 并分布于所述触摸检测区 120 (如图 5中光线 1-4所示） 。
其中，所述反射膜 1062附着于所述导光体 104内远离所述触摸检测区 120的侧面 109的方式包括： 以机械接合或胶粘接合的方式附接于所述导 光体 104内远离所述触摸检测区 120的侧面 109 (此时， 所述反射膜 1062 可为反射条或反射片） ， 或者， 以喷涂、 化学镀或溅射的方式形成于所述 导光体 104内远离所述触摸检测区 120的侧面 109 (此时， 用以形成所述 反射膜 1062的材料的物质形态可为化学溶液或固体颗粒） 。
在与触摸屏第三实施例相类似的其他实施例中，反射膜 1062还可嵌入 于导光体 104内远离触摸检测区 120的侧面 109。 此时， 术语 "嵌入于" 意指形成反射膜 1062时需消耗部分导光体 104材料， 即， 反射膜 1062内 嵌于导光体 104中。
此外， 在与触摸屏第三实施例相类似的其他实施例中， 光源还包括散 光膜，反射膜 1062经由所述散光膜附着或嵌入于导光体 104内远离触摸检 测区 120的侧面 109。 在导光体 104内传输的一部分光线直接经由导光体 104靠近触摸检测区 120的侧面 1092出射，并分布于所述触摸检测区 120。 而传输的另一部分光线经由所述散光膜到达反射膜 1062, 被所述反射膜 1062反射后再经由所述散光膜和导光体 104后由光线出射面 1092射出。 此时， 所述散光膜夹于所述反射膜 1062和所述侧面 109之间。所述反射膜 1062经由所述散光膜附着于所述侧面 109时， 所述散光膜先于所述反射膜 1062附着于所述侧面 109。 所述散光膜可以机械接合或胶粘接合的方式附 接于所述侧面 109 (此时， 所述散光膜可为散光条或散光片， 并具有良好 的透光性）， 或者， 以喷涂、 化学镀或溅射的方式形成于所述侧面 109 (此 时， 用以形成所述散光膜的材料的物质形态可为化学溶液或固体颗粒） 。 所述反射膜 1062经由所述散光膜嵌入于所述侧面 109时，所述散光膜先于 所述反射膜 1062嵌入于所述侧面 109。 此时， 所述散光膜内嵌于所述导光 体 104中， 所述反射膜 1062再内嵌于所述散光膜中。
特别地， 所述反射膜 1062或所述反射膜 1062及所述散光膜还可覆盖 所述导光体 104的顶面或顶面及底面。 在导光体 104内传输的光线经由附 散光膜和所述反射膜 1062后，返向所述导光体 104内，如此可减少经由导 光体 104发出的检测光线发生不必要的散射。
此外， 在触摸屏第三实施例及与其相类似的其他实施例中， 对于发光 体 102及导光体 104的选取， 以及发光体 102与导光体 104之间的位置关 系， 均可与触摸屏第一实施例中所述的相同； 在与本触摸屏第三实施例相 类似的其他实施例中，对反射膜 1062的选取与触摸屏第三实施例中所述的 相同， 在此不再赘述。
需强调的是， 在光源中包含散光物质 （如散光板或散光膜） 时， 散光 物质与反射单元 （如反射板或反射膜）之间的相互关系并不限于上述实施 例中限定的方式。 例如， 还可以在散光板上附着反射膜、 在反光板上附着 散光膜或在反射板和导光体内远离触摸检测区的侧面间夹有散光膜等。 光 源中包含具有上述相互关系的散光物质与反射单元时， 仍可构成触摸屏的 实施例， 具体不再赘述。
本发明的设计人认为， 可以设计导光体内靠近或承载反射板 106或反 射膜 1062等反射单元的侧面的结构，从而在将反射板 106形成于所述侧面 109处时， 可通过改变射向反射板 106的光线的角度调整光线发射的效果； 或者，在将反射膜 1062附着或嵌入于所述侧面 109时，可通过改变所述反 射膜 1062的形态调整光线发射的效果。以上设计均有可能增强分布于触摸 屏触摸检测区 120上的光线的均匀性。
因此， 在上述各触摸屏实施例的基础上， 对导光体 104内远离触摸检 测区 120的侧面 109进行结构改进， 可构成本发明触摸屏的更多实施例。 为描述方便， 在这类实施例中， 仅对导光体 104的结构进行描述。
结合图 6和图 7所示， 在触摸屏第四实施例中， 以导光体 104为圓柱 体为例， 在导光体 104的纵切面方向上， 即， 沿 xx， 方向切割所述导光体 104 时获得的切面上 （对于此前提， 后续触摸屏实施例与此例相同， 不再 赘述） ， 导光体 104内远离触摸检测区 120的侧面 109包括至少两个斜面 组。 各斜面组包括具有夹角 1043的两斜面 1042和 1044。 各斜面组连续排 列。 相邻的斜面组可具有相同的夹角 1043。 其中， 夹角 1043的尖端可位 于导光体 104中未形成所述斜面组时的边界上或边界内。 当位于所述边界 内时， 经由所述斜面组反射的光线更多， 改善其均勾性的效果更明显， 相 对于所述夹角 1043的尖端位于所述边界外时， 也更节省空间。
此外， 在触摸屏第四实施例相类似的其他实施例中， 光源 100可包括 一个发光体 102, 所述发光体 102置于导光体 104的一个端口 105。 此时， 各斜面组的夹角 1043可由靠近所述发光体 102的端口 105至远离所述发光 体 102的端口 105逐渐减小。 光源 100也可包括两个发光体 102 , 两个发 光体 102分别置于导光体 104的两个端口 105。此时，各斜面组的夹角 1043 可由所述导光体 104的端口 105至中心逐渐减小。
特别地， 各斜面组的高度可相等。 所述斜面组的高度意指由夹角 1043 的端点至连接斜面组内两斜面 1042和 1044另一端点间连线的垂直距离。 光源 100包括一个发光体 102时，各斜面组的高度可由靠近所述发光体 102 的端口 105至远离所述发光体 102的端口 105逐渐增大； 光源 100包括两 个发光体 102时， 各斜面组的高度可由所述导光体 104的端口 105至中心 逐渐增大。
需说明的是， 本发明的设计人分析后认为， 减小各斜面组的夹角， 或 者， 增加各斜面组的高度， 均可使在导光体内传输的光线增加被反射的机 会， 利于增强触摸检测区上分布的光线的均匀性。
结合图 8所示， 在触摸屏第五实施例中， 在导光体 104的纵切面方向 上， 所述导光体 104内远离触摸检测区 120的侧面 109包括至少两个弧面 1046。各弧面 1046连续排列，相邻的弧面 1046可具有相同的弧长和弧度。 其中， 所述弧面 1046的顶端可位于导光体 104中未形成各弧面 1046时的 边界上或边界内。 位于所述边界内时， 经由各弧面 1046反射的光线更多， 改善其均勾性的效果更明显，相对于所述弧面 1046的顶端位于所述边界外 时， 也更节省空间。
此外， 在触摸屏第五实施例相类似的其他实施例中， 光源 100包括一 个发光体 102时， 发光体 102置于导光体 104的一个端口 105。 此时， 若 各弧面 1046具有相同弧长， 则其弧度可由靠近所述发光体 102的端口 105 至远离所述发光体 102的端口 105逐渐减大；若各弧面 1046具有相同弧度， 则其弧长可由靠近所述发光体 102的端口 105至远离所述发光体 102的端 口 105逐渐减小。 当光源 100包括两个发光体 102时， 两个发光体 102分 别置于导光体 104的两个端口 105。 此时， 若各弧面 1046具有相同弧长， 则其弧度由所述导光体 104的端口 105至中心逐渐增大； 或者， 若各弧面 1046具有相同弧度， 则其弧长由所述导光体 104的端口 105至中心逐渐减 小。 此时， 各弧面 1046的顶端可不在一条直线上。
需说明的是， 本发明的设计人分析后认为， 减小具有相同弧度的各弧 面的弧长， 或者， 增大具有相同弧长的各弧面的弧度， 均可使在导光体内 传输的光线增加被反射的机会， 利于增强触摸屏触摸检测区上分布的光线 的均匀性。
结合图 9所示， 在触摸屏第六实施例中， 在导光体 104的纵切面方向 上， 所述导光体 104内远离触摸检测区 120的侧面 109包括至少两个矩形 断面 1048。 各矩形断面 1048连续排列， 相邻的矩形断面 1048间的距离可 以相等。 其中， 所述矩形断面 1048间的距离意指相邻的矩形断面 1048间 相对的侧面间的 巨离。
此外，各矩形断面 1048的顶端可位于所述导光体中未形成各矩形断面 1048时的边界上或边界内。 位于所述边界内时， 经由各矩形断面 1048反 射的光线更多， 改善其均勾性的效果更明显， 相对于所述矩形断面 1048 的顶端位于所述边界外时， 也更节省空间。
此外， 在与触摸屏第六实施例相类似的其他实施例中， 光源 100包括 一个发光体 102时， 所述发光体 102置于导光体 104的一个端口 105。 此 时，相邻的矩形断面 1048间距离可由靠近所述发光体 102的端口 105至远 离所述发光体 102的端口 105逐渐减小。光源 100包括两个发光体 102时， 两个发光体 102分别置于导光体 104的两个端口 105。 此时， 相邻的矩形 断面 1048间距离由所述导光体 104的端口 105至中心逐渐减小。
特别地， 各矩形断面 1048 的高度可相等。 光源 100 包括一个发光体 102时，各矩形断面 1048的高度可由靠近所述发光体 102的端口 105至远 离所述发光体 102的端口 105逐渐增大；光源 100包括两个发光体 102时， 各矩形断面 1048的高度可由导光体 104的端口 105至中心逐渐增大。
需说明的是， 本发明的设计人分析后认为， 减小相邻的矩形断面 1048 间距离， 或者， 增加矩形断面 1048的高度， 均可使在导光体 104内传输的 光线增加被反射的机会， 利于增强分布于触摸检测区上的光线的均匀性。
结合图 10所示，在触摸屏第七实施例中，导光体 104内远离触摸检测 区 120的侧面 109可为平面 1140,且所述平面 1140与所述触摸检测区 120 的夹角小于 90度。 如此可降低光线发生不必要的散射的概率。
结合图 6和图 11所示，在触摸屏第八实施例中， 以导光体 104为圓柱 体为例， 在所述导光体 104的横切面方向， 即， 沿 yy' 方向切割所述导光 体 104时获得的切面上 （对于此前提， 后续触摸屏实施例与此例相同， 不 再赘述） ， 所述导光体 104内远离触摸检测区 120的侧面 109包括至少两 个斜面组。 各斜面组包括具有夹角 1143的两斜面 1142和 1144。 各斜面组 连续排列， 相邻的斜面组可具有相同的夹角 1143。 其中， 所述夹角 1143 的尖端可位于所述导光体 104中未形成斜面组时的边界上或边界内。 位于 所述边界内时， 经由斜面组反射的光线更多， 改善其均勾性的效果更明显， 相对于所述夹角 1143的尖端位于所述边界外时， 也更节省空间。
此外， 在与触摸屏第八实施例相类似的其他实施例中， 各斜面组的高 度可相等。各斜面组的夹角 1143可由所述侧面的两边至中心逐渐减小。特 别地， 各斜面组的高度可由所述侧面的两边至中心逐渐增大。 在触摸屏第 八实施例及与其相类似的其他实施例中， 平行于各斜面 1142和 1144的直 线也平行于触摸检测区 120。
需说明的是，本发明的设计人分析后认为，减小各斜面组的夹角 1143 , 或者， 增加各斜面组的高度， 均可使在导光体 104内传输的光线增加被反 射的机会， 利于增强分布于触摸检测区上的光线的均匀性。
如图 12所示，在触摸屏第九实施例中，在导光体 104的横切面方向上， 所述导光体 104内远离触摸检测区 120的侧面 109包括至少两个弧面 1146。 各弧面 1146连续排列，相邻的弧面 1146可具有相同的弧长和弧度。其中， 弧面 1146的顶端可位于所述导光体 104中未形成各弧面 1146时的边界上 或边界内。 位于所述边界内时， 经由各弧面 1146反射的光线更多， 改善其 均匀性的效果更明显，相对于所述弧面 1146的顶端位于所述边界外时，也 更节省空间。
此外， 在与触摸屏第九实施例相类似的其他实施例中， 具有相同弧长 的各弧面 1146的弧度可由所述侧面的两边至中心逐渐减大； 或者， 具有相 同弧度的各弧面 1146的弧长可由所述侧面的两边至中心逐渐减小。 此时， 各弧面 1146的顶端可不在一条直线上。在本触摸屏第九实施例及与其相类 似的其他实施例中，平行于各弧面 1146中心轴的直线也平行于触摸检测区 120。
需说明的是， 本发明的设计人分析后认为， 减小具有相同弧度的各弧 面 1146的弧长， 或者， 增大具有相同弧长的各弧面 1146的弧度， 均可使 在导光体 104内传输的光线增加被反射的机会， 利于增强分布于触摸检测 区上的光线的均匀性。
结合图 13所示，在触摸屏第十实施例中，在导光体 104的横切面方向 上， 所述导光体 104内远离触摸检测区 120的侧面 109包括至少两个矩形 断面 1148。 各矩形断面 1148连续排列， 相邻的矩形断面 1148间的距离可 以相等。 其中， 所述矩形断面 1148间的距离意指相邻的矩形断面 1148间 相对的侧面间的距离。 此外， 各矩形断面 1148 的顶端可位于所述导光体 104中未形成各矩形断面 1148时的边界上或边界内。 位于所述边界内时， 经由各矩形断面 1148反射的光线更多， 改善其均勾性的效果更明显，相对 于所述矩形断面 1148的顶端位于所述边界外时， 也更节省空间。
此外， 在与触摸屏第十实施例相类似的其他实施例中， 相邻的矩形断 面 1148间距离可由所述侧面的两边至中心逐渐减小。特别地，各矩形断面 1148的高度可相等。 各矩形断面 1148的高度也可由所述侧面的两边至中 心逐渐增大。 在本触摸屏第十实施例及与其相类似的其他实施例中， 平行 于各矩形断面 1148中心轴的直线也平行于触摸检测区 120。
需说明的是， 本发明的设计人分析后认为， 减小相邻的矩形断面 1148 间的距离， 或者， 增加矩形断面 1148的高度， 均可使在导光体 104内传输 的光线增加被反射的机会，利于增强分布于触摸检测区上的光线的均匀性。
显然， 将上述触摸屏第四至第六实施例及其相关实施例与第八至第十 实施例及其相关实施例相结合， 或者， 将上述触摸屏第四至第十实施例及 其相关实施例与第一至第三实施例及相关实施例相结合， 可获得本发明触 摸屏的更多实施例， 不再赘述。
此外， 在上述触摸屏第四至第十实施例及其相关实施例中对导光体内 远离触摸检测区的侧面进行的结构改进（如形成斜面组、弧面或矩形断面， 甚至平面） ， 可同样施加于反射板的反射面上。 即， 对所述反射面进行结 构改进， 在其上形成前述实施例中所述的斜面组、 弧面、 矩形断面或平面， 仍可构成触摸屏的实施例， 且该类实施例与前述实施例的结合仍可构成触 摸屏的实施例， 不再赘述。
本发明还提供了一种触摸系统， 所述触摸系统包含上述触摸屏， 所述 触摸系统可以是将所述触摸屏安装在显示器表面而形成的触摸显示器。
本发明还提供了一种光源。 在本发明光源第一实施例中， 光源包括发 光体、 导光体和反射板， 所述发光体置于所述导光体的端口， 所述反射板 形成于所述导光体的侧面处。 所述反射板与所述导光体可以分立。 所述发 传输的一部分光线直接经由所述导光体远离所述反射板的侧面出射。 在所 述导光体内传输的另一部分光线经所述反射板（实际为面向所述导光体的 反射面）反射后， 再通过所述导光体远离所述反射板的侧面出射。
其中， 所述发光体可采用发光二极管或冷阴极荧光灯， 优选的为红外 发光二极管。所述导光体可为玻璃、光纤或亚克力等光透射材料中的一种。 所述导光体可为圓柱体、 三棱柱或长方体等多种形状。 其中， 在所述导光 体内远离所述反射板的侧面 （即， 光线出射面） 为平面时 （例如是三棱柱 或长方体形状的导光体中的一个侧面） ， 使所述平面与光线出射面的夹角 小于 90° , 如此可减少经由所述导光体发出的检测光线发生不必要的散 射。 但所述侧面不仅限于平面， 也可为其它类型的表面， 例如所述侧面为 凹凸不平的表面。 所述反射板可为市场有售的任何反射装置， 如反射条、 平面镜或全反射棱镜组件等。
需说明的是， 将所述发光体置于所述导光体的端口的方式包括： 在所 述端口处形成凹口， 将所述发光体置于所述凹口中。 所述凹口的纵切面可 为锥形、 弧形或矩形等任意形状； 所述凹口的横切面可为圓形、 橢圓形、 方形或矩形等任意形状。 或者， 可以将所述发光体以机械接合或胶粘接合 的方式附接于所述导光体的端口。其中，在所述凹口表面可形成有散光膜， 如此可增强由所述发光体射入所述导光体的光线的均匀性。
此外， 所述发光体的数目可为一个、 两个或多个。 所述光源中只包括 一个发光体时， 所述发光体置于所述导光体的任一端口； 所述光源中包括 两个发光体时， 各发光体分别置于所述导光体的端口。 为增强由所述光源 发出的光线的亮度， 通常在所述光源中包括两个发光体， 本发明中也以此 为例进行说明， 对光源中包括一个发光体的相关实施例不作赘述。
在与光源的第一实施例相类似的其他实施例中， 反射板可附着于导光 体上。 即， 所述反射板可以机械接合或胶粘接合的方式接于所述导光体的 侧面。
在本发明光源第二实施例中， 光源包括发光体、 导光体、 反射板和散 光板。 所述发光体置于所述导光体的端口， 所述反射板形成于所述导光体 的侧面处。 所述反射板与所述导光体可以分立设置， 所述散光板夹于所述 反射板和所述导光体之间。 在所述导光体内传输的一部分光线直接经由所 述导光体远离所述反射板的侧面出射。 在所述导光体内传输的另一部分光 线经由所述散光板到达所述反射板（实际为面向所述导光体的反射面） ， 被所述反射板反射后再通过所述散光板、 导光体由所述导光体中远离所述 反射板的侧面出射。
其中， 所述散光板可与所述反射板或所述导光体分立， 也可与所述反 射板及所述导光体均分立。
在与光源的第二实施例相类似的其他实施例中， 散光板还可附着于反 射板及 /或导光体上。 即， 所述散光板可以机械接合或胶粘接合的方式附 1 接于所述反射板及 /或所述导光体的侧面。所述散光板可为市场有售的任何 散光装置， 只要可使光线发散即可。
特别地， 所述反射板或所述反射板及所述散光板还可覆盖所述导光体 的顶面或顶面及底面。其中， 所述顶面意指将所述导光体沿其纵向放置时， 与其放置面相对的侧面区域； 所述底面意指将所述导光体沿其纵向放置时 的放置面及在所述导光体侧面中由所述放置面适当延展而获得的侧面。 上 述覆盖可以减少经由所述导光体发出的检测光线发生不必要的散射。
此外， 光源的第二实施例及与其相类似的其他实施例中对于发光体、 导光体及反射板的选取， 以及发光体与导光体之间的位置关系， 均可与光 源的第一实施例中所述的相同， 在此不再赘述。 在本发明光源第三实施例中， 光源包括发光体、 导光体和反射膜。 所 述发光体置于所述导光体的端口， 所述反射膜附着于所述导光体的侧面。 光体内传输的一部分光线直接经由所述导光体远离所述反射膜的侧面出 射。 而在所述导光体内传输的另一部分光线经由所述反射膜反射后再通过 所述导光体中远离所述反射膜的侧面出射。
其中， 所述反射膜附着于所述导光体的侧面的方式包括： 以机械接合 或胶粘接合的方式附接于所述导光体的侧面 （此时， 所述反射膜可为反射 条或反射片） ， 或者， 以喷涂、 化学镀或溅射的方式形成于所述导光体的 侧面 （此时， 用以形成所述反射膜的材料的物质形态可为化学溶液或固体 颗粒） 。
在与光源的第三实施例相类似的其他实施例中， 反射膜还可嵌入于导 光体的侧面。 此时， 术语 "嵌入于" 意指形成所述反射膜时需消耗部分所 述导光体材料， 即， 所述反射膜内嵌于所述导光体中。
此外， 在与光源的第三实施例相类似的其他实施例中， 光源还包括散 光膜， 反射膜经由所述散光膜附着或嵌入于导光体的侧面。 在导光体内传 输的一部分光线直接经由所述导光体远离所述反射膜的侧面出射； 而在所 述导光体内传输的另一部分光线经由所述散光膜到达所述反射膜， 被所述 反射膜反射后再经由所述散光膜和导光体由光线出射面射出。 此时， 所述 散光膜夹于所述反射膜和所述侧面之间。 所述反射膜经由所述散光膜附着 于所述侧面时， 所述散光膜先于所述反射膜附着于所述侧面。 所述散光膜 可以机械接合或胶粘接合的方式附接于所述侧面 （此时， 所述散光膜可为 散光条或散光片， 并具有良好的透光性） ， 或者， 以喷涂、 化学镀或溅射 的方式形成于所述侧面 （此时， 用以形成所述散光膜的材料的物质形态可 为化学溶液或固体颗粒）。所述反射膜经由所述散光膜嵌入于所述侧面时， 所述散光膜先于所述反射膜嵌入于所述侧面， 此时， 所述散光膜内嵌于所 述导光体中， 所述反射膜再内嵌于所述散光膜中。
特别地， 所述反射膜或所述反射膜及所述散光膜还可覆盖所述导光体 的顶面。 在所述导光体内传输的光线经由附着或嵌入于所述导光体的顶面 的所述反射膜或所述散光膜和所述反射膜后返向所述导光体内， 如此可减 少经由所述导光体发出的检测光线发生不必要的散射。
此外， 光源的第三实施例及与其相类似的其他实施例中对于所述发光 体及导光体的选取， 以及所述发光体与导光体之间的位置关系， 均可与光 源的第一实施例中所述的相同。 在与光源的第三实施例相类似的其他实施 例中，对反射膜的选取与光源的第三实施例中所述的相同，在此不再赘述。
需强调的是， 在光源中包含散光物质 （如散光板或散光膜） 时， 散光 物质与反射单元 （如反射板或反射膜）之间的相互关系并不限于上述实施 例中限定的方式。 例如， 还可以包括在散光板上附着反射膜、 在反光板上 附着散光膜或在反射板和导光体内远离触摸检测区的侧面间夹有散光膜 等。 光源中包含具有上述相互关系的散光物质与反射单元时， 仍可构成光 源的实施例， 具体不再赘述。
本发明的设计人认为， 可以设计导光体内靠近或承载反射板及反射膜 等反射单元的侧面的结构， 从而在将反射板形成于所述侧面处时， 可通过 改变射向所述反射板的光线的角度调整光线发射的效果； 或者， 在将反射 膜附着或嵌入于所述侧面时， 可通过改变反射膜的形态调整光线发射的效 果。 以上设计均可以增强由光源发出的光线的均匀性。
因此， 在上述各光源实施例的基础上， 对导光体内靠近或承载反射单 元的侧面进行结构改进， 可构成本发明光源的更多实施例。 为描述方便， 在这类实施例中， 仅对导光体的结构进行描述。
在光源的第四实施例中， 以导光体为圓柱体为例， 在导光体的纵切面 方向， 即， 如图 6所示的沿 xx， 方向切割所述导光体时获得的切面上（对 于此前提， 后续光源实施例与此例相同， 不再赘述） ， 所述导光体内靠近 或 7 载反射单元的侧面包括至少两个斜面组。 各斜面组包括具有夹角的两 斜面。 各斜面组连续排列， 相邻的斜面组可具有相同的夹角。 其中， 所述 夹角的尖端可位于所述导光体中未形成所述斜面组时的边界上或边界内。 位于所述边界内时， 经由所述斜面组反射的光线更多， 改善其均勾性的效 果更明显， 相对于所述夹角的尖端位于所述边界外时， 也更节省空间。
此外， 在与光源的第四实施例相类似的其他实施例中， 光源可包括一 个发光体， 所述发光体置于导光体的一个端口。 此时， 各斜面组的夹角可 由靠近所述发光体的端口至远离所述发光体的端口逐渐减小。 光源也可包 括两个发光体， 两个发光体分别置于导光体的两个端口。 此时， 各斜面组 的夹角可由所述导光体的端口至中心逐渐减小。
特别地， 各斜面组的高度可相等。 所述斜面组的高度意指由所述夹角 的端点至连接所述斜面组内两斜面另一端点间连线的垂直距离。 光源包括 一个发光体时， 各斜面组的高度可由靠近所述发光体的端口至远离所述发 光体的端口逐渐增大； 光源包括两个发光体时， 各斜面组的高度可由所述 导光体的端口至中心逐渐增大。
需说明的是， 本发明的设计人分析后认为， 减小各斜面组的夹角， 或 者， 增加各斜面组的高度， 均可使在所述导光体内传输的光线增加被反射 的机会， 利于增强由所述光源发出的光线的均匀性。
在光源的第五实施例中， 在导光体的纵切面方向上， 所述导光体内靠 近或 7 载反射单元的侧面包括至少两个弧面。 各弧面连续排列， 相邻的弧 面可以具有相同的弧长和弧度。 其中， 弧面的顶端可位于所述导光体中未 形成各所述弧面时的边界上或边界内。 位于所述边界内时， 经由各弧面反 射的光线更多， 改善其均勾性的效果更明显， 相对于所述弧面的顶端位于 所述边界外时， 也更节省空间。
此外， 在与光源的第五实施例相类似的其他实施例中， 光源包括一个 发光体时， 所述发光体置于导光体的一个端口。 此时， 若各弧面具有相同 弧长， 则其弧度可由靠近所述发光体的端口至远离所述发光体的端口逐渐 减大； 若各弧面具有相同弧度， 则其弧长可由靠近所述发光体的端口至远 离所述发光体的端口逐渐减小。 光源包括两个发光体时， 两个发光体分别 置于导光体的两个端口。 此时， 若各弧面具有相同弧长， 则其弧度由所述 导光体的端口至中心逐渐增大； 或者， 若各弧面具有相同弧度， 则其弧长 由所述导光体的端口至中心逐渐减小。 此时， 各弧面的顶端可不在一条直 线上。
需说明的是， 本发明的设计人分析后认为， 减小具有相同弧度的各弧 面的弧长， 或者， 增大具有相同弧长的各弧面的弧度， 均可使在导光体内 传输的光线增加被反射的机会， 利于增强由光源发出的光线的均匀性。 在光源的第五实施例中， 在导光体的纵切面方向上， 所述导光体内靠 近或承载反射单元的侧面包括至少两个矩形断面。 各矩形断面连续排列， 相邻的矩形断面间的距离可以相等。 其中， 所述矩形断面间的距离意指相 邻的矩形断面间相对的侧面间的距离。
此外， 各矩形断面的顶端可位于所述导光体中未形成各矩形断面时的 边界上或边界内。 位于所述边界内时， 经由各矩形断面反射的光线更多， 改善其均勾性的效果更明显， 相对于所述矩形断面的顶端位于所述边界外 时， 也更节省空间。
此外， 在与光源的第五实施例相类似的其他实施例中， 光源包括一个 发光体时， 所述发光体置于导光体的一个端口。 此时， 相邻的矩形断面间 的距离可由靠近所述发光体的端口至远离所述发光体的端口逐渐减小。 光 源包括两个发光体时， 两个发光体分别置于导光体的两个端口。 此时， 相 邻的矩形断面间的距离由所述导光体的端口至中心逐渐减小。
特别地， 各矩形断面的高度可相等。 光源包括一个发光体时， 各矩形 断面的高度可由靠近所述发光体的端口至远离所述发光体的端口逐渐增 大。 光源包括两个发光体时， 各矩形断面的高度可由导光体的端口至中心 逐渐增大。
需说明的是， 本发明的设计人分析后认为， 减小相邻的矩形断面间的 距离， 或者， 增加矩形断面的高度， 均可使在导光体内传输的光线增加被 反射的机会， 利于增强由光源发出的光线的均匀性。
在光源的第六实施例中， 导光体内靠近或承载反射单元的侧面可为平 面， 且所述平面与光线出射面的夹角小于 90° 。 如此可降低光线发生不必 要的散射的概率。
在光源的第七实施例中， 以导光体为圓柱体为例， 在所述导光体的横 切面方向， 即， 如图 6所示的沿 yy， 方向切割所述导光体时获得的切面上 (对于此前提， 后续光源实施例与此例相同， 不再赘述） ， 所述导光体内 靠近或承载反射单元的侧面包括至少两个斜面组。 各斜面组包括具有夹角 的两斜面。 各斜面组连续排列， 相邻的斜面组可具有相同的夹角。 其中， 所述夹角的尖端可位于所述导光体中未形成所述斜面组时的边界上或边界 内。 位于所述边界内时， 经由所述斜面组反射的光线更多， 改善其均匀性 的效果更明显，相对于所述夹角的尖端位于所述边界外时，也更节省空间。
此外， 在与光源的第七实施例相类似的其他实施例中， 各斜面组的高 度可相等。 各斜面组的夹角也可由所述侧面的两边至中心逐渐减小。 特别 地， 各斜面组的高度可由所述侧面的两边至中心逐渐增大。 在光源的第七 实施例及与其相类似的其他实施例中， 平行于各斜面的直线也平行于导光 体的轴。
需说明的是， 本发明的设计人分析后认为， 减小各斜面组的夹角， 或 者， 增加各斜面组的高度， 均可使在导光体内传输的光线增加被反射的机 会， 利于增强由光源发出的光线的均匀性。
在光源的第八实施例中， 在导光体的横切面方向上， 所述导光体内靠 近或 7 载反射单元的侧面包括至少两个弧面。 各弧面连续排列， 相邻的弧 面可以具有相同的弧长和弧度。 其中， 弧面的顶端可位于所述导光体中未 形成各弧面时的边界上或边界内。 位于所述边界内时， 经由各弧面反射的 光线更多， 改善其均勾性的效果更明显， 相对于所述弧面的顶端位于所述 边界外时， 也更节省空间。
此外， 在与光源的第八实施例相类似的其他实施例中， 若各弧面具有 相同弧长， 则其弧度可由所述侧面的两边至中心逐渐减大； 若各弧面具有 相同弧度， 则其弧长可由所述侧面的两边至中心逐渐减小。 此时， 各弧面 的顶端可不在一条直线上。 在光源的第八实施例及与其相类似的其他实施 例中， 平行于各弧面中心轴的直线也平行于导光体的轴。
需说明的是， 本发明的设计人分析后认为， 减小具有相同弧度的各弧 面的弧长， 或者， 增大具有相同弧长的各弧面的弧度， 均可使在导光体内 传输的光线增加被反射的机会， 利于增强由光源发出的光线的均匀性。
在光源的第九实施例中， 在导光体的横切面方向上， 所述导光体内靠 近或承载反射单元的侧面包括至少两个矩形断面。 各矩形断面连续排列， 相邻的矩形断面间的距离可以相等。 其中， 所述矩形断面间的距离意指相 邻的矩形断面间相对的侧面间的 巨离。 此外， 各矩形断面的顶端可位于所 述导光体中未形成各矩形断面时的边界上或边界内。 位于所述边界内时， 经由各矩形断面反射的光线更多， 改善其均勾性的效果更明显， 相对于所 述矩形断面的顶端位于所述边界外时， 也更节省空间。
此外， 在与光源的第九实施例相类似的其他实施例中， 相邻的矩形断 面间的距离可由所述侧面的两边至中心逐渐减小。 特别地， 各矩形断面的 高度可相等。 各矩形断面的高度也可由所述侧面的两边至中心逐渐增大。 在光源的第九实施例及与其相类似的其他实施例中， 平行于各矩形断面中 心轴的直线也平行于导光体的轴。
需说明的是， 本发明的设计人分析后认为， 减小相邻的矩形断面间的 距离， 或者， 增加矩形断面的高度， 均可使在导光体内传输的光线增加被 反射的机会， 利于增强由光源发出的光线的均匀性。
显然， 将上述光源的第四至第六实施例及其相关实施例与第八至第十 实施例及其相关实施例相结合， 或者， 将上述光源的第四至第十实施例及 其相关实施例与第一至第三实施例及相关实施例相结合， 可获得本发明光 源的更多实施例， 不再赘述。
此外， 在上述光源的第四至第十实施例及其相关实施例中对导光体侧 面进行的结构改进（如形成斜面组、 弧面或矩形断面， 甚至平面） ， 可同 样施加于反射板的反射面上。 即， 对反射面进行结构改进， 在其上形成前 述实施例中所述的斜面组、 弧面、 矩形断面或平面， 仍可构成光源的实施 例，且该类实施例与前述实施例的结合仍可构成光源的实施例， 不再赘述。
综上， 利用发光体和导光体构成面光源， 再基于反射原理利用反射单 元提高由所述面光源发出的光线的均匀性， 可以增强光线的均匀性。 导光体的端口处附着或嵌入有散光膜， 也利于增强由发光体射入所述导光 体的光线的均勾性。 本领域技术人员根据本发明的技术方案得出的其他的 实施方式， 同样属于本发明的技术创新范围。

Claims

权利要求
1、一种光源，其特征在于： 所述光源包括发光体、导光体和反射单元， 所述发光体置于所述导光体的端口， 所述反射单元形成于所述导光体的侧 所述导光体内传输的部分光线经所述反射单元反射后由所述导光体内远离 所述反射单元的侧面射出。
2、 根据权利要求 1所述的光源， 其特征在于： 所述反射单元为反射板 或反射膜；
所述反射板与所述导光体分立或附着于所述导光体的侧面， 所述反射 板中面向所述导光体的侧面形成有反射面；
或者， 所述反射膜附着或嵌入于所述导光体的侧面。
3、 根据权利要求 2所述的光源， 其特征在于： 所述反射面及 /或所述 导光体内靠近所述反射单元的侧面包括至少两个斜面组， 各所述斜面组包 括具有夹角的两斜面， 各所述斜面组连续排列； 其中：
相邻的斜面组具有相同的夹角； 或者，
所述斜面组沿所述导光体的纵切面方向时， 各所述斜面组的夹角由所 述导光体及 /或所述反射板的端口至中心逐渐减小；
所述斜面组沿所述导光体的横切面方向时， 各所述斜面组的夹角由所 减小。
4、 根据权利要求 3所述的光源， 其特征在于： 各所述斜面组等高； 或 者， 所述斜面组沿所述导光体的纵切面方向时， 各所述斜面组的高度由所 述导光体及 /或所述反射板的端口至中心逐渐增大； 所述斜面组沿所述导光 体的横切面方向时， 各所述斜面组的高度由所述导光体内靠近所述反射单 元的侧面及 /或所述反射面的两边至中心逐渐增大。
5、 根据权利要求 2所述的光源， 其特征在于： 所述反射面及 /或所述 导光体内靠近所述反射单元的侧面包括至少两个弧面， 各所述弧面连续排 列； 其中： 相邻的所述弧面具有相同的弧长和弧度； 或者，
各所述弧面沿所述导光体的纵切面方向时， 若各弧面具有相同弧长， 则其弧度由所述导光体及 /或所述反射板的端口至中心逐渐增大，若各弧面 具有相同弧度， 则其弧长由所述导光体及 /或所述反射板的端口至中心逐渐 减小；
各所述弧面沿所述导光体的横切面方向时， 若各弧面具有相同弧长， 则其弧度由所述导光体内靠近所述反射单元的侧面及 /或所述反射面的两 边至中心逐渐增大； 若各弧面具有相同弧度， 则其弧长由所述导光体内靠
6、 根据权利要求 2所述的光源， 其特征在于： 所述反射面及 /或所述 导光体内靠近所述反射单元的侧面包括至少两个矩形断面， 各所述矩形断 面连续排列； 其中：
相邻的所述矩形断面间的距离相等； 或者，
各所述矩形断面沿所述导光体的纵切面方向时， 相邻的矩形断面间的 距离由所述导光体及 /或所述反射板的端口至中心逐渐减小；
各所述矩形断面沿所述导光体的横切面方向时， 相邻的矩形断面间的 中心逐渐减小。
7、 根据权利要求 6所述的光源， 其特征在于： 各所述矩形断面等高； 或者， 各所述矩形断面沿所述导光体的纵切面方向时， 各所述矩形断面的 高度由所述导光体及 /或所述反射板的端口至中心增大；各所述矩形断面沿 所述导光体的横切面方向时， 各所述矩形断面的高度由所述导光体内靠近
8、 根据权利要求 2所述的光源， 其特征在于： 所述反射面及 /或所述 导光体内靠近所述反射单元的侧面为平面， 且所述平面与光线发射面间的 夹角小于 90度。
9、 根据权利要求 1所述的光源， 其特征在于： 所述反射单元覆盖所述 导光体的顶面和底面。
10、 根据权利要求 1至 9中任一项所述的光源， 其特征在于： 所述光 源还包括散光物质， 所述散光物质位于所述反射单元和所述导光体之间， 在所述导光体内传输的部分光线经所述散光物质到达所述反射单元， 被所 侧面射出。
11、 根据权利要求 1所述的光源， 其特征在于： 所述发光体为发光二 极管或冷阴极荧光灯。
12、 根据权利要求 1所述的光源， 其特征在于： 所述导光体为玻璃、 光纤或亚克力中的一种。
13、 根据权利要求 1所述的光源， 其特征在于： 在所述导光体的端口 所述导光体。
14、 一种触摸屏， 包括：
触摸检测区；
光学传感单元， 用以获得发生于所述触摸检测区上的触摸数据； 控制单元， 耦接于所述光学传感单元， 利用从所述光学传感单元获取 的所述触摸数据来确定触摸位置； 以及
如权利要求 1 - 13中任一项所述的光源， 置于所述触摸检测区的至少 一个侧边， 其中所述光源中的导光体的形成有反射单元的侧面远离所述触 摸检测单元， 使得在所述导光体内传输的部分光线经由所述反射单元反射 后分布于所述触摸检测区。
15、 一种触摸系统， 包括根据权利要求 14所述的触摸屏。
PCT/CN2010/078665 2009-11-12 2010-11-12 一种触摸屏、触摸系统及光源 WO2011057572A1 (zh)

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