JP4101102B2 - Light emitting element type composite display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light-emitting element type composite display device in which light emission indicating a specific shape of a main display portion and overall planar light emission of a light guide plate are overlaid.
[0002]
[Prior art]
A segment display device that selectively emits light from a plurality of segment display units and displays one number or the like as a whole is known. In the display device, a plurality of LED elements are loaded on the substrate so that, for example, one light-emitting diode (LED) is arranged corresponding to each segment. It will be something. On the other hand, a transparent light guide plate is placed opposite to the front side of such a segment display, a side LED for entering light is added from the side of the light guide plate, and the light guide plate is attached to the predetermined light by the light of the LED. The segment light emission such as the above-described numbers and the light emission of the planar shape of the light guide plate can be overlaid by causing the color to emit light, thereby giving a decorative change to a simple segment display.
[0003]
[Problems to be solved by the invention]
However, in this case, a substrate on which a plurality of LED elements of the segment display unit are loaded and a side substrate that is assembled at right angles to the side LED elements for the light guide plate are required, and the structure is complicated. In addition, it is troublesome to assemble and is difficult to provide at a low cost.
[0004]
It is an object of the present invention to simplify and inexpensively provide a structure of a display device with a light guide plate that can change the main display of a segment display unit.
[0005]
[Means for Solving the Problems and Effects of the Invention]
In order to solve the above problems, the present invention
A main display unit that displays a specific shape by a plurality of light emitting elements, a transparent planar light guide plate disposed opposite to the main display unit on the front side of the main display unit, and emitting light from the light guide plate A light-emitting element for a light guide plate that serves as a light source for
The light emitting elements for the main display section and the light emitting elements for the light guide plate are arranged such that the light emitting elements for the light guide plate are located outside and the plurality of light emitting elements for the main display section are located inside the light emitting elements. Arranged on the same substrate,
The light guide plate approaches a light guide element for the light guide plate disposed on the common substrate from a flat light guide plate main body portion facing the common substrate, and both opposite ends of the light guide plate main body portion. An extension part extending integrally with the extension part, and the extension part has an arcuate curved part smoothly connected to the light guide plate body part in a curved shape,
Covered on the outer surface corresponding to the extended portion of the light guide plate, and has a cover side curved portion that engages from the outside of the arc-shaped curved portion formed in the extended portion, and is elastically deformable formed at the tip An engaging pawl is engaged with the outer edge side of the common substrate, thereby connecting the extension portion and both ends of the common substrate to integrate the light guide plate and the common substrate. With a connecting cover,
The plurality of light emitting elements for the main display portion selectively emit light to display the specific shape, and the light emitting elements for the light guide plate emit light, and the light is arcuate in the extension portion of the light guide plate. The light guide plate main body is guided to the flat light guide plate main body while changing its direction in the curved portion, and the light guide plate main body emits light in a planar shape. The light-emitting display form layered with the entire planar light emission is visually recognized from the front side of the light guide plate.
[0006]
As described above, since the light emitting element in the main display unit and the light emitting element for the light guide plate are arranged on the same (common) substrate while having a composite structure with the light guide plate, a side substrate is unnecessary. Since the structure is simple and the light emitting elements need only be loaded in common on the same substrate, assembly is easy and a composite display device can be obtained at low cost.
[0007]
Further, in the present invention, the light emitting element for the light guide plate is located on the outer side of the substrate, and the plurality of light emitting elements for the main display unit are disposed on the inner side, so that the end of the light guide plate approaches the substrate side. The light emitting element for the light guide plate is disposed on the substrate corresponding to the end of the extension, and the light from the light emitting element is guided to the light guide plate through the extension. ing.
[0008]
Thus, since the extension part is formed so that the both ends of the light guide plate are close to the light emitting element as the light source outside the main display part, the light emitting element for the light guide plate emits light for the main display part. Even if it is mounted on the same substrate as the element, the light of the light emitting element for the light guide plate is guided from its extension to the light guide plate, the light emission indicating the specific shape of the main display part and the overall planar shape of the light guide plate The light emission can be displayed in a layered manner.
[0009]
In the present invention, the main display unit may be a so-called dot matrix type display unit (image display is also possible) in addition to a segment display unit in which a plurality of light emitting regions (each segment) are combined in a predetermined form in advance. .
[0010]
In order to solve the above-mentioned problem when the segment display method is assumed, the present invention
A segment display unit as a main display unit that is arranged corresponding to each of the plurality of segments and displays specific shapes such as numbers by selectively emitting light to the plurality of segments, and on the front side of the segment display unit A transparent planar light guide plate disposed facing the segment display unit, and a light emitting element for the light guide plate serving as a light source for causing the light guide plate to emit light,
A plurality of light emitting elements corresponding to a plurality of segments of the segment display unit and the light emitting elements for the light guide plate are arranged in the same direction on the same common substrate, and the light emitting elements for the light guide plate include On the other hand, the plurality of light emitting elements of the segment display unit are respectively located on the common substrate on the inner side of the light emitting elements for the light guide plate. Extension portions are formed so that both end portions of the light guide plate that are positioned and face the common substrate approach toward both end portions of the common substrate, and the end portions of the extension portions and the light guide plate The light emitting elements are in a positional relationship corresponding to each other,
The light guide plate approaches a light guide element for the light guide plate disposed on the common substrate from a flat light guide plate main body portion facing the common substrate, and both opposite ends of the light guide plate main body portion. An extension part extending integrally with the extension part, and the extension part has an arcuate curved part smoothly connected to the light guide plate body part in a curved shape,
Covered on the outer surface corresponding to the extended portion of the light guide plate, and has a cover side curved portion that engages from the outside of the arc-shaped curved portion formed in the extended portion, and is elastically deformable formed at the tip An engaging pawl is engaged with the outer edge side of the common substrate, thereby connecting the extension portion and both ends of the common substrate to integrate the light guide plate and the common substrate. With a connecting cover,
A plurality of light emitting elements for the segment display part selectively emit light to display a specific shape by a combination of segments, the light emitting element for the light guide plate emits light, and the light is an extension of the light guide plate The light guide plate is guided to the flat light guide plate main body portion while changing the direction in the arcuate curved portion of the light source, and the light guide plate main body portion emits light in a planar shape, thereby indicating light emission and a specific shape of the segment display portion. A light-emitting display form layered with the entire planar light emission of the main body is visually recognized from the front side of the light guide plate. Since the light emission for the light guide plate overlaps the light emission of a specific shape (usually a number or the like) of the segment display portion, the decorative effect is enhanced by adding light emission spreading to the periphery to the specific segment display.
[0011]
Further, in the present invention, the light guide plate is formed by integrating a flat light guide plate main body facing the common substrate and an extension extending from the end of the light guide plate main body so as to approach the common substrate. The extension portion has a shape having an arcuate curved portion that is smoothly connected to the light guide plate body portion in a curved shape.
[0012]
Since it has such a shape having an arcuate curved portion, the light emission output taken into the light guide plate travels while the light taken into the light guide plate is bent along the arcuate curved portion by the curved portion. It is possible to guide to a flat main body while changing the direction. For this reason, the light generated by the light emitting element is efficiently guided to the light guide plate, and can be superimposed on the light emission of the main display unit.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a light-emitting element type composite display device (hereinafter simply referred to as a composite display device) of the present invention will be described below with reference to the accompanying drawings.
[0014]
First, FIG. 1 is a front view of the composite display device of the present invention as viewed from the upper surface (the upper portion of the connection cover is cut). In this figure, there is a segment display section 10 as a main display section, and this segment display section 10 can display 10 kinds of numbers from 0 to 9 by combining 7 pieces of display segments 12 into an 8-character shape. It is what. Each display segment 12 is provided with one light-emitting element 13, and each light-emitting element 13 includes a light-emitting diode, which is hereinafter referred to as a segment light-emitting element or a segment LED.
[0015]
A light guide plate 18 (FIGS. 2 to 4) is disposed on the front side of the segment display unit 10, and the light guide plate 18 is made of a transparent resin (such as an acrylic resin) or glass. On both sides (upper and lower) of the segment display unit 10, a plurality of light emitting elements 15 (this light emitting element is composed of a light emitting diode, hereinafter referred to as a light guide plate light emitting element or a light guide plate LED) are disposed. Has been. Both the segment LED 13 and the light guide plate LED 15 are mounted on a common substrate 16. The substrate 16 has a flat plate shape, and a segment constituting frame 14 (hereinafter referred to as a reflector) that divides each display segment 12 into the space is fixed to an inner surface facing the light guide plate 18 in parallel. The reflector 14 is made of, for example, a resin whose inside is hollow, and a side surface corresponding to each display segment 12 functions as a reflecting surface.
[0016]
A segment LED 13 is mounted on the substrate 16 on the bottom surface of each display segment 12 formed between the reflectors 14. Further, the light guide plate LED 15 is mounted on the same substrate 16 outside the reflector 14 in the same direction as the segment LED 15 (the optical axes of both LEDs are parallel).
[0017]
The light guide plate 18 includes a main body portion 20 that faces the substrate 16 in parallel and an extension portion 21 that protrudes toward the substrate 16 at both ends thereof. Each extension portion 21 intersects the main body portion 20 of the light guide plate 18 and extends toward the substrate 16 so as to be substantially at a right angle. Each tip 23 thereof is close to and opposed to the substrate 16, and its tip surface 23 is the substrate 16. And parallel to the optical axis of the light guide plate LED15.
[0018]
In this way, the light guide plate 18 has a form in which a flat plate is bent at right angles at both ends. As shown in FIGS. 1 and 2, the extension portion 21 of the light guide plate 18 extends linearly in the vertical direction of the segment display portion 10. The plurality of light guide plates LED15 described above are arranged in a straight line at a predetermined interval along the longitudinal direction of the distal end surface 23 of the extension portion 21. These light guide plates LED15 and the end surface 23 of the extension 21 are in close proximity or in contact with each other.
[0019]
The light emitted from the LED 15 for the light guide plate enters the extension portion 21 from the front end surface 23, further changes its direction by approximately 90 degrees, and is guided to the main body portion 20 of the light guide plate 18. In the light guide plate 18, an arcuate curved portion 22 is formed at a connection portion between the extension portion 21 and the main body portion 20, and light entering the extension portion 21 is bent (reflected) along the curved portion 22. The traveling direction is changed and the light is guided to the main body 20 described above, and the flat main body 20 emits light in a planar manner.
[0020]
FIG. 5 shows the positional relationship between the tip surface 23 and the light guide plate LED 15 described above. The light guide plate LED15 and the distal end surface 23 of the extension portion 21 are formed substantially along the plane so as to be substantially parallel to the substrate 16, and the plurality of light guide plates LED15 are opposed to each other in close proximity to the plane. Further, since the optical axis of the light guide plate LED 15 and the tip surface 23 thereof are orthogonal to each other and the tip surface 23 is very close to the light guide plate LED 15, the light emission of the light guide plate LED 15 is an extension of the light guide plate 18. Efficiently incorporated. As shown in FIG. 6, in the distal end surface 23 of the extension portion 21 of the light guide plate 18, notches or depressions are provided in portions facing the plurality of light guide plate LEDs 15, and the light guide plate LED 15 is formed in the extension portion 21. You may make it closely accommodate.
[0021]
Returning to FIG. 2, the relationship among the light guide plate 18, the common substrate 16, the connection cover 24, and the like will be described. The light guide plate 18 covers the end face of the reflector 14 (the top of the segment frame) to make a shallow fit. The light guide plate 18 is formed with a recess 26 (see also FIG. 4) that fits shallowly with the reflector 14. Further, a connection cover 24 is provided so as to cover the outside of the extension portion 21. The connection cover 24 is formed of an opaque resin, and prevents light guided from the light guide plate LED 15 from leaking sideways. The connecting cover 24 is placed on an outer surface corresponding to the extension 21 of the light guide plate 18, and particularly includes a cover-side curved portion 24 a that engages with the arc-shaped curved portion 22 from the outside, and the light guide plate 18 faces the substrate 16. The light guide plate 18 is connected to the substrate 16 so as to be integrated by pressing. A locking claw 25 that can be elastically deformed is formed at the tip of the connecting cover 24, and the segment display unit 10 (segment LED 13) and the light guide plate LED 15 are integrally loaded by forcibly engaging the outer edge side of the substrate 16. The substrate 16 and the light guide plate 18 are integrated.
[0022]
A plate holding portion 27 for fixing and holding the protective plate 19 is formed at the end of the connection cover 24 opposite to the locking claw 25. The protective plate 19 is in close contact with the flat main body portion 20 of the light guide plate 18 to protect the surface of the light guide plate 18, and its outer edge is fitted into the plate holding portion 27 and fixed to the connection cover 24. . In order to prevent the surface of the light guide plate 18 from being scratched, the protective plate 19 is made of, for example, a harder or similar transparent resin, such as polycarbonate, than the light guide plate 18.
[0023]
On the back surface (surface on the substrate 16 side) of the light guide plate 18 (main body portion 20), a scattering surface 28 such as minute unevenness is formed in order to scatter light emitted in a planar shape from the light guide plate 18. The planar light emission by the light guide plate 18 is emitted at a wider angle. For example, as shown in FIG. 7, the scattering surface 28 is formed into a scattering surface 28 having fine irregularities by colliding fine particles such as shots over almost the entire back surface of the light guide plate 18. As its action, as shown in FIG. 8, the light guided from the light guide plate LED 15 diffuses on the scattering surface 28 formed on the back surface of the light guide plate 18, so that the light guide plate 18 becomes scattered light 15 a ′ and 15 b ′. The light guide plate 18 emits light more uniformly in a planar shape. Further, the light from the segment LED 13 becomes scattered light 13 a by the scattering action of the scattering surface 28 (in synergy with the reflecting action of the reflector 14), and is projected forward through the light guide plate 18. Thereby, each segment appears to emit light more uniformly and entirely.
[0024]
Although the scattering surface 28 can be provided on the surface of the light guide plate 18, forming the scattering surface 28 on the back surface of the light guide plate 18 makes the shape of the entire segment by light emission of the segment LED 13 clearer (outer edge). Tends to be displayed more sharply).
[0025]
FIG. 10 shows an energization circuit for the segment LED 13 (seven in this example) and the light guide plate LED 15 (12 in this example, six on each side of the light guide plate 18) of the above composite display device 11, and FIG. The common terminals P1 and P9 for voltage application and the energization terminals P2 to P8 to the seven segment LEDs 13 and the energization terminals P10 to P15 to the twelve segment LEDs 15 are shown. A certain number of light guide plates LED15 arranged on each side of the light guide plate 18 (six in this example) are common connection terminals on both sides.
[0026]
The connection terminals (connection pins) P9 to P15 (7 poles) and the connection terminals (connection pins) P1 to P8 (8 poles) are mounted in parallel with each other along both ends of the substrate 16 in two rows of linear arrays. ing. As shown in FIG. 10, the electrical connection between each connection pin and each light-emitting element 13, 15 is connected to the anodes of all the light-emitting elements 13, 15 so that + voltage power can be commonly supplied to the connection pins P1 and P9. Furthermore, the cathodes of the segment LEDs 13 corresponding to the seven display segments 13 are connected to the connection pins P <b> 2 to P <b> 8 and connected to the output terminals of the display control unit 29. The connection pins P10 to P15 are connected to the cathodes of the light guide plate LEDs 15 (corresponding to each other on the both sides of the light guide plate 18 are connected in series in pairs), and are similarly output terminals of the display control unit 29. Led to.
[0027]
In the connection configuration shown in FIG. 11, by selectively applying a voltage from the display control unit 29 to a plurality (seven) of segment LEDs 13, for example, a predetermined number is displayed in a segment as a specific figure. That is, as is well known, only the segment emitted by the segment LED 13 emits light, and this light emission form is irradiated to the outside through the light guide plate 18. For example, if each segment LED 13 is red, numbers and the like are displayed in red. Further, when voltages are applied simultaneously from the display control unit 29, the light emitted from the light guide plate LED 15 is guided to the light guide plate 18 from the extension portions 21 on both sides of the light guide plate 18, and the main body portion 20 faces the surface. By causing the light to be emitted, the light is layered on the numbers and the like by the segment display described above, and light is superimposed and irradiated on a wider surface.
[0028]
If the segment LED 13 is, for example, red, the light guide plate LED 15 is also the same or similar to the red, and the background light emission form around the clear segment display, for example, around the red number display, A lighter red background or ambient lighting is displayed. In this case, in FIG. 11, among the groups of light guide plate LEDs 15 (P10 to P15), for example, the energization is performed while being shifted little by little to the connection terminals P10 to P15, or energized sequentially in sequence according to the terminals P15 to P10. By causing the display control unit 29 to perform time difference energization (light emission) such as stopping, the light emission form of the light guide plate 18 is changed over time in the arrangement direction of the light guide plate LEDs 15 (for example, light emission display is performed like a neon sign). Thus, the planar light corresponding thereto can be superimposed on the segment light emission).
[0029]
The above assumes that the light guide plate LEDs 15 are all of the same color, but by changing the color of the LED on one side of the light guide plate LED 15 and that on the other side, a group of different LEDs can be selectively selected for each color. By switching and emitting light, it is possible to change the setting of the planar light emission color of the light guide plate 18 or to change over time (for example, change or switching between similar colors). Furthermore, the change of the luminescent color and the change over time may be performed in an inclined or stepwise manner.
[0030]
Further, the light guide plate LED 15 is a mixed color of RGB (three original colors) for generating various colors, and each RGB LED (predetermined number) emits light, and this RGB light guide plate LED 15 By selectively emitting light, it is possible to cause the light guide plate 18 to generate planar light emission of various colors.
[0031]
In the segment LED 13, the LED of each segment may have a different emission color. Furthermore, the present invention is not a segment, but instead may be a so-called dot matrix type main display unit on which planar light emission by the light guide plate 18 may be superimposed.
[Brief description of the drawings]
FIG. 1 is a front view of an embodiment of a light-emitting element type composite display device according to the present invention.
FIG. 2 is a side sectional view thereof.
FIG. 3 is a front view showing an example of a light guide plate.
FIG. 4 is a cross-sectional view of the light guide plate.
FIG. 5 is a view showing an arrangement relationship between the distal end of the extension portion of the light guide plate and the light guide plate LED.
6 is a view showing a modification of FIG.
FIG. 7 is a back view showing a range of a scattering surface formed on the light guide plate.
FIG. 8 is a diagram for explaining the action of the scattering surface of the light guide plate.
FIG. 9 is a diagram showing an example of an arrangement form of terminals on a substrate.
10 is a diagram showing a connection example of light emitting diodes corresponding to FIG. 9;
FIG. 11 is a circuit diagram showing an example of an electrical connection configuration including the composite display device of the present invention.
[Explanation of symbols]
10 segment display (main display)
11 Composite Display Device 12 Display Segment 13 Segment Light Emitting Element (Segment LED, Segment Light Emitting Element)
14 reflector 15 light guide plate light emitting element (light guide plate LED, light guide element for light guide plate)
16 Substrate 17 Connection pin 18 Light guide plate 19 Protective plate 20 Light guide plate main body 21 Light guide plate extension 22 Light guide plate arc-shaped curved portion 23 Extension tip end face 24 Connection cover 25 Connection cover locking claw 26 Recess 27 Plate holding unit 28 Scattering surface 29 Display control unit

Claims (6)

A main display unit that displays a specific shape by a plurality of light emitting elements, a transparent planar light guide plate disposed opposite to the main display unit on the front side of the main display unit, and emitting light from the light guide plate A light-emitting element for a light guide plate that serves as a light source for
The light emitting elements for the main display section and the light emitting elements for the light guide plate are arranged such that the light emitting elements for the light guide plate are located outside and the plurality of light emitting elements for the main display section are located inside the light emitting elements. Arranged on the same substrate,
The light guide plate approaches a light guide element for the light guide plate disposed on the common substrate from a flat light guide plate main body portion facing the common substrate, and both opposite ends of the light guide plate main body portion. An extension part extending integrally with the extension part, and the extension part has an arcuate curved part smoothly connected to the light guide plate body part in a curved shape,
Covered on the outer surface corresponding to the extended portion of the light guide plate, and has a cover side curved portion that engages from the outside of the arc-shaped curved portion formed in the extended portion, and is elastically deformable formed at the tip An engaging pawl is engaged with the outer edge side of the common substrate, thereby connecting the extension portion and both ends of the common substrate to integrate the light guide plate and the common substrate. With a connecting cover,
The plurality of light emitting elements for the main display portion selectively emit light to display the specific shape, and the light emitting elements for the light guide plate emit light, and the light is arcuate in the extension portion of the light guide plate. The light guide plate main body is guided to the flat light guide plate main body while changing its direction in the curved portion, and the light guide plate main body emits light in a planar shape. A light-emitting element type composite display device, wherein a light-emitting display form layered with overall planar light emission is viewed from the front side of the light guide plate. A segment display unit as a main display unit that is arranged corresponding to each of the plurality of segments and displays specific shapes such as numbers by selectively emitting light to the plurality of segments, and on the front side of the segment display unit A transparent planar light guide plate disposed facing the segment display unit, and a light emitting element for the light guide plate serving as a light source for causing the light guide plate to emit light,
A plurality of light emitting elements corresponding to a plurality of segments of the segment display unit and the light emitting elements for the light guide plate are arranged in the same direction on the same common substrate, and the light emitting elements for the light guide plate include Each of the plurality of light emitting elements of the segment display unit is located on the common substrate on the inner side of the light emitting elements for the light guide plate. Extension portions are formed so that both end portions of the light guide plate facing the substrate approach toward both end portions of the common substrate, and the end portions of the extension portions and the light emitting elements for the light guide plate correspond to each other. In a positional relationship
The light guide plate approaches a light guide element for the light guide plate disposed on the common substrate from a flat light guide plate main body portion facing the common substrate, and both opposite ends of the light guide plate main body portion. An extension part extending integrally with the extension part, and the extension part has an arcuate curved part smoothly connected to the light guide plate body part in a curved shape,
Covered on the outer surface corresponding to the extended portion of the light guide plate, and has a cover side curved portion that engages from the outside of the arc-shaped curved portion formed in the extended portion, and is elastically deformable formed at the tip An engaging pawl is engaged with the outer edge side of the common substrate, thereby connecting the extension portion and both ends of the common substrate to integrate the light guide plate and the common substrate. With a connecting cover,
A plurality of light emitting elements for the segment display part selectively emit light to display a specific shape by a combination of segments, the light emitting element for the light guide plate emits light, and the light is an extension of the light guide plate The light guide plate is guided to the flat light guide plate main body portion while changing the direction in the arcuate curved portion of the light source, and the light guide plate main body portion emits light in a planar shape, thereby indicating light emission and a specific shape of the segment display portion. A light-emitting element type composite display device, wherein a light-emitting display form layered with the entire planar light emission of the main body is visually recognized from the front side of the light guide plate.   Both the light emitting element that emits light from the main display unit and the light emitting element that emits light from the light guide plate are light emitting diodes (LEDs), and these LED elements are respectively mounted on the common substrate in the same direction. The conducting wire part which supplies electricity to the group of LED elements for the said main display part, and the conducting wire part which supplies electricity to the group of LED elements for the said light-guide plates are formed in the surface or back surface of a board | substrate. Light emitting element type composite display device.   A pattern for causing only the main display section to emit light by switching energization to a group of light emitting elements that emit light from the main display section and a group of light emitting elements that emit light from the light guide plate, and a pattern of the main display section and the light guide plate 4. The light emitting element type composite display device according to any one of claims 1 to 3, wherein at least two patterns of light emission display with a pattern in which both of them emit light in layers are possible.   A plurality of light emitting elements having different emission colors are used as the light emitting elements for the light guide plate, and the light emission color emitted from the light guide plate can be changed by controlling the combination of energization of the plurality of light emitting elements. The light-emitting element type composite display device according to any one of claims 1 to 4.   The light-emitting element type composite display device according to claim 1, wherein a scattering surface that diffuses light is formed on a back surface or a front surface of the light guide plate or separately from the light guide plate.

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