Nothing Special   »   [go: up one dir, main page]

WO2016080169A1 - Unité d'émission de lumière de surface - Google Patents

Unité d'émission de lumière de surface Download PDF

Info

Publication number
WO2016080169A1
WO2016080169A1 PCT/JP2015/080511 JP2015080511W WO2016080169A1 WO 2016080169 A1 WO2016080169 A1 WO 2016080169A1 JP 2015080511 W JP2015080511 W JP 2015080511W WO 2016080169 A1 WO2016080169 A1 WO 2016080169A1
Authority
WO
WIPO (PCT)
Prior art keywords
light emitting
light
optical adjustment
adjustment member
region
Prior art date
Application number
PCT/JP2015/080511
Other languages
English (en)
Japanese (ja)
Inventor
祐亮 平尾
孝二郎 関根
昌宏 今田
Original Assignee
コニカミノルタ株式会社
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 コニカミノルタ株式会社 filed Critical コニカミノルタ株式会社
Priority to JP2016560137A priority Critical patent/JPWO2016080169A1/ja
Publication of WO2016080169A1 publication Critical patent/WO2016080169A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements

Definitions

  • This disclosure relates to a surface light emitting unit including a surface light emitting panel.
  • a general tablet terminal 50 includes a casing 51 and a plurality of display units 52 to 55.
  • the thickness T of the tablet terminal 50 is, for example, 7 mm or less.
  • the front side shown in FIG. 15 will be described as an example.
  • the backlight and illumination built in the terminal 50 are required to be able to emit light up to a portion near the end of the casing 51.
  • a surface light-emitting unit including a surface light-emitting panel can be applied not only to a backlight but also to the lighting field.
  • An organic EL is known as an example of a surface emitting panel.
  • Organic EL is expected to be a new light source because it is a thin surface emitting panel and has flexibility.
  • a surface light emitting panel such as an organic EL
  • sealing is generally performed around the light emitting portion in order to protect the light emitting portion (such as a light emitting layer or a light emitting element) from moisture and oxygen.
  • the sealing part is provided so as to cover the light emitting part, the sealing part has a larger area than the light emitting part. For this reason, not only a light emitting region that actually emits light but also a non-light emitting region that emits little or no light is formed on the surface of the surface light emitting panel that emits light (light emitting surface).
  • this surface emitting panel is used for the backlight of the tablet terminal as shown in FIG. 15, the area that does not emit light cannot be used for illumination of the display unit, and is the portion of the frame in FIG.
  • width W width W
  • the width W must be increased, and the display portion is relatively small. Therefore, it is required to make the width of the non-light emitting region as small as possible.
  • Patent Document 1 a side wall having an inclined shape is arranged around the light emitting surface of the flat light source, and a predetermined interval is provided from the light emitting surface. Light is guided to the backlight surface. Thereby, the backlight system enlarges the area of the light emitting region.
  • An LED (Light Emitting Diode) illumination device disclosed in Japanese Patent Application Laid-Open No. 2013-145723 (Patent Document 2) divides a light-transmitting diffusion plate on the light projecting side of an LED light-emitting unit to separate the light from the LED. It diffuses and reduces glare.
  • the organic EL element disclosed in Japanese Patent Application Laid-Open No. 2011-243448 has a light reflecting layer made of a specular metal film in a portion other than the light emitting surface, so that it can be used originally. The effective use of the light that did not exist.
  • the backlight system disclosed in Patent Document 1 needs to reflect the light emitted from the first light emitting surface by the side wall and take it out from the second light emitting surface. For this reason, a distance must be provided between the first light emitting surface and the second light emitting surface, which increases the thickness of the backlight system.
  • the LED illumination device disclosed in Patent Document 2 must be provided with a light transmissive diffusion plate spaced apart, which increases the thickness of the LED illumination device.
  • the organic EL element disclosed in Patent Document 3 has a large luminance difference between the light emitting region and the non-light emitting region, and is difficult to recognize as one surface emitting panel. Therefore, a person who sees the organic EL element recognizes the non-light emitting area.
  • the present disclosure has been made in order to solve the above-described problems, and an object in one aspect is to provide a surface light emitting unit capable of making a non-light emitting region less noticeable than the conventional one while keeping the thickness thin. Is to provide.
  • the surface light emitting unit includes a surface light emitting panel having a light emitting surface, a first transmissive member having a front surface and a back surface, and provided so that the light emitting surface and the back surface face each other, An optical adjustment member for reducing light from the surface of the first transmission member; and an optical adjustment member on a surface opposite to the first transmission member side. And a diffusing member provided to face each other.
  • the light emitting surface of the surface light emitting panel includes a light emitting region that emits light and a non-light emitting region that is located on the outer periphery of the light emitting region and does not emit light. At least a portion of the optical adjustment member is provided to face the light emitting region.
  • the width in the predetermined direction within the surface of the optical adjustment member is shorter than the width in the predetermined direction of the light emitting region in at least one direction within the surface.
  • the surface light emitting unit can make the non-light emitting region less noticeable than the conventional one while keeping the thickness thin.
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG. It is an arrow directional cross-sectional view of a surface emitting panel. It is a top view which shows a surface emitting panel, and is equivalent to the surface emitting panel 20 seen from the arrow IV direction in FIG. It is a top view which shows a surface emitting panel and an optical adjustment member, and is equivalent to the surface emitting unit seen from the I direction in FIG.
  • FIG. 1 It is a top view which shows the surface emitting panel and optical adjustment member according to a modification, and is equivalent to the surface emitting panel and optical adjustment member seen from the I direction in FIG. It is a figure which shows sectional drawing of the surface emitting unit according to Embodiment 2, and is arrow sectional drawing along the II-II line in FIG. It is a top view which shows a surface emitting panel and a reflecting member, and is equivalent to the surface emitting panel and reflecting member seen from the VIII direction in FIG. It is the figure which showed the light distribution curve of the surface emitting unit according to Embodiment 3 by the vertical in-plane light distribution.
  • 10 is a graph showing an aperture ratio and an aperture width of an optical adjustment member in Example 5.
  • It is a perspective view which shows the structure of the back surface side of the tablet terminal which has a general structure.
  • FIG. 1 is a plan view showing the surface light emitting unit 100, and corresponds to the surface light emitting unit 100 viewed from the direction of arrow I in FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
  • the surface light emitting unit 100 includes a surface light emitting panel 20, a transmissive member 21 (first transmissive member), an optical adjustment member 22, and a transmissive member 24 (second transmissive member). And a diffusing member 26.
  • FIG. 3 is a cross-sectional view of the surface light emitting panel 20 as viewed from the direction of the arrow.
  • FIG. 4 is a plan view showing the surface light emitting panel 20, and corresponds to the surface light emitting panel 20 viewed from the direction of arrow IV in FIG.
  • the surface light emitting panel 20 includes an anode 12, a light emitting layer 13, a cathode 14, a sealing member 15, and an insulating layer 16.
  • the anode 12 is a conductive film having transparency.
  • the anode 12 is formed, for example, by depositing ITO on the transmission member 21 (see FIG. 2).
  • the ITO film for forming the anode 12 is divided into two regions by patterning in order to form the electrode extraction part 17 (for anode) and the electrode extraction part 18 (for cathode).
  • the ITO film of the electrode extraction portion 18 is connected to the cathode 14.
  • the light emitting layer 13 generates light when supplied with electric power.
  • the light emitting layer 13 is configured by laminating a single layer or a plurality of layers.
  • the cathode 14 is made of aluminum (AL), for example, and is formed so as to cover the light emitting layer 13.
  • the insulating layer 16 is provided between the cathode 14 and the anode 12. A portion of the cathode 14 opposite to the side where the insulating layer 16 is located is connected to the electrode extraction portion 18.
  • the sealing member 15 is made of glass, thin film glass, resin film, or the like.
  • the sealing member 15 seals the anode 12, the light emitting layer 13, and the cathode 14 on the transmission member 21 (see FIG. 2).
  • the electrode extraction parts 17 and 18 are exposed from the sealing member 15 for electrical connection.
  • the electrode extraction portions 17 and 18 are electrically connected to an external power source through a wiring member (not shown).
  • the surface emitting panel 20 may be a so-called bottom emission type organic EL element or a top emission type organic EL element. Or the surface emitting panel 20 may be comprised from an inorganic EL element, and may be comprised from several light emitting diode (LED). Moreover, the surface emitting panel 20 may be a single-sided light emitting device or a double-sided light emitting device.
  • LED light emitting diode
  • Light emitting area RA and non-light emitting area RB of the surface light emitting panel 20 With reference to FIGS. 1 to 3 again, the light emitting area RA and the non-light emitting area RB of the surface light emitting panel 20 will be described.
  • power is supplied to the light emitting layer 13 through a wiring member (not shown), electrode extraction portions 17 and 18, the anode 12 (transparent electrode), and the cathode 14.
  • Light is generated in the light emitting layer 13, and a part of the light passes through the anode 12 and the transmissive member 21 as it is, and is extracted from the light emitting surface 20 ⁇ / b> S, and the other part of the light is reflected by the cathode 14 and then the anode 12. Then, the light passes through the transmissive member 21 and is taken out from the light emitting surface 20S.
  • the light emitting surface 20S of the surface light emitting panel 20 includes a light emitting area RA and a non-light emitting area RB.
  • the light emitting region RA is a region on the light emitting layer 13, and the light generated in the light emitting layer 13 is emitted from the light emitting region RA (see the white arrow in FIG. 3).
  • the non-light emitting region RB is located on the outer periphery of the light emitting region RA and emits little or no light.
  • the non-light emitting region RB is formed so as to surround the light emitting region RA by providing the sealing member 15 and the electrode extraction portions 17 and 18 on the surface light emitting panel 20.
  • the light emitting region RA and the non-light emitting region RB are partitioned by a boundary line indicated by a one-dot chain line.
  • the boundary line is formed in a rectangular shape having points P1, P2, Q1, and Q2 as four vertices.
  • a rectangular light-emitting region RA is located inside the boundary line, and an annular shape is formed outside the boundary line.
  • the non-light emitting region RB is located.
  • the width LA of the light emitting region RA is, for example, 3.5 mm
  • the width LB of the non-light emitting region RB is, for example, 2 mm or more.
  • the transmission member 21 is composed of a flat plate member having a front surface 21A and a back surface 21B.
  • the transmissive member 21 is provided so that the back surface 21 ⁇ / b> B faces the light emitting surface 20 ⁇ / b> S of the surface light emitting panel 20.
  • the rear surface 21B of the transmissive member 21 and the front surface 20A of the surface light emitting panel 20 are in contact with each other.
  • the transmissive member 21 a material having high transmittance (for example, a total light transmittance in a visible light wavelength region measured by a method based on JIS K 7361-1: 1997 is 80% or more) and excellent in flexibility is used. It is preferable to be used.
  • the transmissive member 21 is made of a transparent resin film such as PMMA (Polymethyl Methacrylate). The thickness of PMMA is 0.2 mm, for example.
  • the light emitted from the light emitting area RA enters the inside from the back surface 21B of the transmissive member 21.
  • the incident light passes through the inside of the transmissive member 21 and is emitted as it is from the surface 21A of the transmissive member 21, or the interface between the transmissive member 21 and the optical adjustment member 22, or between the transmissive member 21 and the transmissive member 24.
  • the light After being reflected at the interface between them and propagating in the in-plane direction inside the transmissive member 21, the light is emitted from the surface 21 ⁇ / b> A of the transmissive member 21.
  • the optical adjustment member 22 has a front surface 22A and a back surface 22B.
  • the optical adjustment member 22 is provided so as to face the surface 21 ⁇ / b> A of the transmission member 21.
  • the optical adjustment member 22 is provided on the surface 21 ⁇ / b> A of the transmission member 21 by applying white ink by inkjet onto the surface 21 ⁇ / b> A of the transmission member 21.
  • the width LC of the optical adjustment member 22 in the surface direction (left and right direction in FIG. 2) is, for example, 3 mm.
  • the width LC of the optical adjustment member 22 is shorter than the width LA of the light emitting region RA of the surface light emitting panel 20.
  • the optical adjustment member 22 has a function of dimming light from the surface 21A of the transmission member 21. More specifically, the optical adjustment member 22 transmits part of the light reaching the back surface 22B of the optical adjustment member 22 from the front surface 21A of the transmission member 21, or the optical adjustment member 22 of the optical adjustment member 22 from the front surface 21A of the transmission member 21. The other part of the light reaching the back surface 22B is reflected, or the other part of the light reaching the back surface 22B of the optical adjustment member 22 from the front surface 21A of the transmission member 21 is absorbed. As an example, the light reflectance of the optical adjustment member 22 is 47.5%. The light transmittance of the optical adjustment member 22 is 47.5%. The optical absorptivity of the optical adjustment member 22 is 5.0%. A part of the light reflected by the optical adjustment member 22 propagates again in the in-plane direction (the left-right direction in FIG. 2) inside the transmission member 21.
  • the optical adjustment member 22 is preferably composed of a member containing a scattering material.
  • the scattering material include inorganic fine particles such as titanium oxide, barium sulfate, magnesium sulfate, magnesium carbonate, calcium carbonate, and silica.
  • organic (crosslinked) fine particles such as acrylic resin, organic silicone resin, polystyrene resin, urea resin, formaldehyde condensate, and fluorine resin are also included.
  • polyolefin resins represented by polymethylpentene, polypropylene, polyethylene, alicyclic olefins dispersed in islands, polyester resins represented by polyethylene terephthalate, polyethylene-2, 6-naphthalate, etc.
  • thermoplastic resins including various copolymers
  • acrylic resins typified by polymethyl methacrylate and the like
  • hollow particles or bubbles may be mentioned.
  • the particles one kind may be used alone, or two or more kinds may be used in combination.
  • the optical adjustment member 22 may be a sheet-like member or a film-like member as long as it has a function of reducing light from the surface 21A of the transmission member 21. These members may be attached to the surface 21A of the transmissive member 21 using a transparent optical adhesive or the like, or face the surface 21A of the transmissive member 21 with a slight gap. May be provided. When the interval is provided, the back surface 22 ⁇ / b> B of the optical adjustment member 22 is preferably parallel to the surface 21 ⁇ / b> A of the transmission member 21.
  • FIG. 5 is a plan view showing the surface light emitting panel 20 and the optical adjustment member 22 and corresponds to the surface light emitting unit 100 viewed from the I direction in FIG.
  • the configuration of the surface light emitting unit 100 other than the surface light emitting panel 20 and the optical adjustment member 22 is omitted in FIG.
  • At least a part of the optical adjustment member 22 is provided to face the light emitting area RA of the surface light emitting panel 20.
  • the optical adjustment member 22 is provided so as not to overlap at least a part of the light emitting region RA.
  • the size of the optical adjustment member 22 is smaller than the size of the light emitting region RA, and the optical adjustment member 22 is provided in the plane of the light emitting region RA.
  • the width in the predetermined direction (for example, width X1, Y1) in the plane of the optical adjustment member 22 is the width in the predetermined direction (for example, width X2, Y2) of the light emitting region RA in at least one direction in the plane. Shorter than.
  • the “width in a predetermined direction within the surface of the optical adjustment member 22” here refers not only to the width X1 and the width Y1 corresponding to the length of the side of the optical adjustment member 22, but also to the oblique angle within the surface of the optical adjustment member 22. Including the width corresponding to the direction.
  • the surface light emitting panel 20 and the optical adjustment member 22 are arranged, so that light is reduced in the central portion in the light emitting area RA where the optical adjustment member 22 is covered.
  • light is not dimmed at the outer peripheral portion in the light emitting area RA where the optical adjustment member 22 is not covered.
  • the surface emitting unit 100 can make the non-light emitting region RB located around the light emitting region RA appear bright.
  • the surface light emitting unit 100 can reduce the luminance difference between the light emitting area RA and the non-light emitting area RB, and the non-light emitting area RB looks as if it is shining in the same way as the light emitting area RA. Can do. For this reason, the non-light emitting region RB is less noticeable.
  • the optical adjustment member 22 is provided by applying white ink to the surface 21A of the transmission member 21 by ink jetting, even if the optical adjustment member 22 is provided in the surface light emitting unit 100, surface light emission.
  • the thickness of the unit 100 hardly increases.
  • FIG. 6 is a plan view showing the surface light-emitting panel 20 and the optical adjustment member 22 according to the modification, and corresponds to the surface light-emitting panel 20 and the optical adjustment member 22 viewed from the I direction in FIG.
  • the configuration of the surface light emitting unit 100 other than the surface light emitting panel 20 and the optical adjustment member 22 is omitted in FIG. 6.
  • the width of the optical adjustment member 22 in a predetermined direction is shorter than the width of the light emitting region RA in at least one direction, and at least a part of the optical adjustment member 22 is provided to face the light emitting region RA of the surface light emitting panel 20.
  • the positional relationship and size between the light emitting region RA and the optical adjustment member 22 are not particularly limited. For example, as shown in FIG. 6, if the width Y1 of the optical adjustment member 22 is shorter than the width Y2 of the light emitting region RA, the width X1 of the optical adjustment member 22 may be longer than the width X2 of the light emitting region RA. .
  • the surface light emitting unit 100 can reduce the luminance difference between the light emitting area RA and the non-light emitting area RB in the vertical direction of the paper in FIG. 6. Can be small. As a result, the surface light emitting unit 100 can appear as if the non-light emitting region RB is shining in the same manner as the light emitting region RA in the vertical direction of the drawing in FIG.
  • the transmission member 24 is composed of a flat plate member having a front surface 24A and a back surface 24B.
  • the transmissive member 24 is provided such that the back surface 24 ⁇ / b> B faces the front surface 22 ⁇ / b> A of the optical adjustment member 22.
  • the transmissive member 24 is made of a material having a high transmittance (for example, a total light transmittance of 80% or more in a visible light wavelength region measured by a method according to JIS K 7361-1: 1997) and excellent flexibility. It is preferable to be used.
  • the transmissive member 24 is made of a transparent resin film such as PMMA.
  • the thickness of PMMA is 0.22 mm, for example.
  • the light from the front surface 22A of the optical adjustment member 22 enters the inside from the back surface 24B of the transmission member 24.
  • the incident light passes through the inside of the transmissive member 24 and is emitted as it is from the surface 24 A of the transmissive member 24, or is reflected at the interface between the transmissive member 24 and the diffusing member 26 and is in-plane within the transmissive member 24.
  • the light After being transmitted in the direction (left and right direction in FIG. 2), the light is emitted from the surface 24A of the transmission member 24.
  • the diffusing member 26 is configured by a flat member having a front surface 26A and a back surface 26B.
  • the diffusing member 26 is provided so as to face the surface (surface 22A) opposite to the transmitting member 21 side of the optical adjusting member 22.
  • the diffusing member 26 is provided at a distance from the surface 22 ⁇ / b> A of the optical adjustment member 22, and the transmissive member 24 is provided between the transmissive member 21 and the diffusing member 26.
  • the diffusion member 26 is provided so that the back surface 26 ⁇ / b> B is in contact with the front surface 24 ⁇ / b> A of the transmission member 24.
  • the diffusing member 26 is provided such that its back surface 26B is in contact with the surface 22A of the optical adjusting member 22. That is, in this case, the transmission member 24 is not provided between the optical adjustment member 22 and the diffusion member 26.
  • the diffusing member 26 has a function of diffusing light emitted from the surface 24A of the transmitting member 24 and reaching the diffusing member 26.
  • the diffusing member 26 is composed of, for example, a sheet-like member or a film-like member. More specifically, as the diffusing member 26, the surface of a resin member such as acrylic or polycarbonate is subjected to minute unevenness processing (that is, one using an interface reflection action), or the base material is represented by titanium oxide. A material in which a scattering material containing white scattering particles is uniformly dispersed (that is, a material using an internal scattering effect) or the like can be used.
  • the diffusion member 26 has a Haze value of 90%, for example.
  • the diffusion member 26 is provided at a distance H (see FIG. 2) from the surface 20A of the surface light emitting panel 20.
  • a distance H see FIG. 2
  • the surface emitting unit 100 can appear as if the non-light emitting region RB is shining.
  • the distance H between the surface light emitting panel 20 and the diffusing member 26 is longer than the width W2 of the non-dimming region (see FIG. 2). Accordingly, the surface light emitting unit 100 can reduce the luminance difference between the area that is dimmed by the optical adjustment member 22 and the area that is not dimmed. Can be recognized as one light source.
  • the optical adjustment member 22 is provided so as to face the light emitting region RA of the surface light emitting panel 20. Further, the width in the predetermined direction in the plane of the optical adjustment member 22 is shorter than the width in the predetermined direction of the light emitting region RA in at least one direction in the plane. Thereby, light is attenuated in the central portion in the light emitting region RA where the optical adjustment member 22 is covered, and light is not attenuated in the outer peripheral portion in the light emitting region RA where the optical adjustment member 22 is not covered.
  • the surface light emitting unit 100 can reduce the luminance difference between the light emitting area RA and the non-light emitting area RB, and the non-light emitting area RB looks as if it is shining in the same way as the light emitting area RA. Can do. For this reason, the non-light emitting region RB is less noticeable.
  • each of the surface light emitting panel 20, the transmissive member 21, the optical adjusting member 22, the transmissive member 24, and the diffusing member 26 is provided such that the interfaces thereof are in contact with each other. More specifically, the light emitting surface 20 ⁇ / b> S of the surface light emitting panel 20 is in contact with the back surface 21 ⁇ / b> B of the transmissive member 21. The front surface 21 ⁇ / b> A of the transmissive member 21 is in contact with one surface (back surface 22 ⁇ / b> B) of the optical adjustment member 22. The other surface (front surface 22A) of the optical adjustment member 22 is in contact with the back surface 24B of the transmission member 24. The front surface 24 ⁇ / b> A of the transmission member 24 is in contact with one surface (back surface 26 ⁇ / b> B) of the diffusion member 26.
  • the surface emitting unit 100 can increase the proportion of light emitted to the viewing side. Further, the light emitted from the light emitting area RA of the surface light emitting panel 20 is often inclined in the area on the non-light emitting area RB than the area on the light emitting area RA.
  • the surface light emitting unit 100 suppresses total reflection and Fresnel loss that occur between the interface of each component and air in the region on the non-light emitting region RB. Can do. As a result, the surface light emitting unit 100 can increase the luminance of the region corresponding to the non-light emitting region RB.
  • FIG. 7 is a cross-sectional view of the surface emitting unit 100A, and is a cross-sectional view taken along the line II-II in FIG.
  • FIG. 8 is a plan view showing the surface light emitting panel 20 and the reflecting member 30 and corresponds to the surface light emitting panel 20 and the reflecting member 30 as viewed from the VIII direction in FIG.
  • the configuration of the surface light emitting unit 100A other than the surface light emitting panel 20 and the reflecting member 30 is omitted in FIG.
  • the surface light emitting unit 100A further includes a reflecting member 30 in addition to the configuration of the surface light emitting unit 100 according to the first embodiment.
  • the reflection member 30 is provided on the non-light emitting region RB located around the light emitting region RA of the surface light emitting panel 20.
  • the reflection member 30 may be formed on the entire non-light emitting region RB, or may be formed on a part of the non-light emitting region RB.
  • the reflecting member 30 has a light reflecting function or a scattering function.
  • a specular reflecting member is used as the reflecting member 30, for example.
  • the material used for the reflecting member 30 include polymer materials such as PET (polyethylene terephthalate), metals such as Al and Ag.
  • the reflecting member 30 may be made of an organic solvent-based white ink in which scattering particles are dispersed.
  • the scattering reflection surface by the reflection member 30 can be formed by, for example, applying white ink to the back surface 21B of the transmission member 21 by inkjet.
  • the reflection member 30 reflects the light reflected at the interface between the transmission member 21 and the optical adjustment member 22 or the interface between the transmission member 21 and the transmission member 24 toward the viewing side of the surface emitting unit 100A. Thereby, the surface emitting unit 100A can radiate more light from the region on the non-light emitting region RB. As a result, the surface light emitting unit 100A can increase the luminance of the non-light emitting region RB.
  • FIG. 9 is a diagram showing a light distribution curve of the surface light emitting panel 20 used in the surface light emitting unit 100B as a vertical in-plane light distribution.
  • more light is emitted in an oblique direction in order to collect more light in non-light emitting region RB of surface emitting panel 20. Since the configuration of surface emitting unit 100B is the same as that of surface emitting unit 100 according to the first embodiment, description thereof will not be repeated.
  • the surface light emitting unit 100B draws a light distribution curve in a plane perpendicular to the light emitting surface 20S (see FIG. 3) of the light emitted from the surface light emitting panel 20, the normal direction of the light emitting surface 20S (that is, FIG. 3).
  • the light distribution curve satisfies the condition of L> cos ⁇ . At least.
  • the condition of L> cos ⁇ when the luminance is higher than the light distribution curve 31 at least in part. Is satisfied.
  • the light distribution curve 32 shown as “oblique light distribution” in FIG. 9 satisfies the condition of L> cos ⁇ .
  • the light distribution curve 32 generally satisfies the condition of L> cos ⁇ at ⁇ 80 ° ⁇ ⁇ ⁇ ⁇ 60 ° and 60 ° ⁇ ⁇ 80 °.
  • the surface emitting unit 100B distributes light so as to satisfy the condition of L> cos ⁇ .
  • the surface light emitting unit 100B can guide more light to the region on the non-light emitting region RB, and can reduce the luminance difference between the light emitting region RA and the non-light emitting region RB.
  • the surface light emitting unit 100B can make the non-light-emitting area RB appear to shine like the light-emitting area RA, and the non-light-emitting area RB becomes inconspicuous.
  • FIGS. 10 to 13 a simulation performed on the above-described embodiment will be described.
  • the simulation is a comparison between Examples 1 to 5 based on the above-described embodiment and a comparative example not based on the above-described embodiment.
  • the difference between the first to fifth embodiments and the comparative example is mainly that the optical adjusting member 22 is provided in the first to fifth embodiments, and the optical adjusting member 22 is not provided in the comparative example.
  • the configuration of the comparative example and the configurations of Examples 1 to 5 will be described in order, and then the simulation results of the comparative example and Examples 1 to 5 will be described.
  • FIG. 10 is a cross-sectional view of the surface light emitting unit 200, and is a cross-sectional view taken along the line II-II in FIG.
  • FIG. 11 is a table showing the difference in configuration of the surface emitting units according to the comparative example and Examples 1 to 5.
  • the surface light emitting unit 200 includes a surface light emitting panel 20 having a light emitting area RA and a non-light emitting area RB, a transmissive member 21, and a diffusing member 26. As shown in FIGS. 10 and 11, the surface emitting unit 200 is not provided with the optical adjustment member 22.
  • the width LA of the light emitting area RA of the surface light emitting panel 20 is 3.5 mm.
  • the non-light emitting area RB of the surface light emitting panel 20 is located around the light emitting area RA, and the width LB of the non-light emitting area RB is 2 mm or more.
  • the transmission member 21 is made of PMMA.
  • the thickness of the transmissive member 21 is 0.42 mm.
  • the diffusing member 26 is composed of a white scattering sheet having a light transmittance of 50%.
  • the Haze value of the diffusing member 26 is 90%.
  • Light distribution from the light emitting area RA is Lambert light distribution.
  • the back surface of the light emitting region RA is a reflective electrode having a reflectance of 70%, and the back surface of the non-light emitting region RB is a metal reflecting surface having a reflectance of 60%.
  • the surface light emitting unit includes a surface light emitting panel 20, a transmission member 21, an optical adjustment member 22, a transmission member 24, and a diffusion member 26.
  • the surface light emitting panel 20 has a light emitting area RA and a non-light emitting area RB.
  • the width LA of the light emitting area RA is 3.5 mm.
  • the non-light emitting region RB is located around the light emitting region RA, and the width LB of the non-light emitting region RB is 2 mm or more.
  • the back surface of the light emitting area RA is composed of a reflective electrode having a reflectance of 70%.
  • the back surface of the non-light emitting region RB is composed of a metal reflecting surface with a reflectance of 60%.
  • the transmission member 21 is made of PMMA.
  • the thickness of the transmissive member 21 is 0.2 mm.
  • the optical adjustment member 22 is composed of a white scattering sheet having a transmittance of 50%.
  • the haze value of the optical adjustment member 22 is 99%.
  • the transmission member 24 is made of PMMA.
  • the thickness of the transmissive member 21 is 0.22 mm. The interfaces of the transmission member 21, the optical adjustment member 22, and the transmission member 24 are in contact with each other.
  • Example 1 the light distribution of the surface light emitting panel 20 is a Lambert light distribution (see FIG. 9).
  • the reflectance of the optical adjustment member 22 is 47.5%.
  • the transmittance of the optical adjustment member 22 is 47.5%.
  • the absorptance of the optical adjustment member 22 is 5.0%.
  • the width of the optical adjustment member 22 (width X1 or width Y1 in FIG. 5) is 3 mm.
  • the light distribution of the surface light emitting panel 20 is a Lambert light distribution (see FIG. 9).
  • the reflectance of the optical adjustment member 22 is 47.5%.
  • the transmittance of the optical adjustment member 22 is 47.5%.
  • the absorptance of the optical adjustment member 22 is 5.0%.
  • the width of the optical adjustment member 22 (width X1 or width Y1 in FIG. 5) is 0.5 mm.
  • the light distribution of the surface light emitting panel 20 is a Lambert light distribution (see FIG. 9).
  • the reflectance of the optical adjustment member 22 is 30.0%.
  • the transmittance of the optical adjustment member 22 is 65.0%.
  • the absorptance of the optical adjustment member 22 is 5.0%.
  • the width of the optical adjustment member 22 (width X1 or width Y1 in FIG. 5) is 2.75 mm.
  • the light distribution of the surface light emitting panel 20 is an oblique light distribution (see FIG. 9).
  • the reflectance of the optical adjustment member 22 is 47.5%.
  • the transmittance of the optical adjustment member 22 is 47.5%.
  • the absorptance of the optical adjustment member 22 is 5.0%.
  • the width of the optical adjustment member 22 (width X1 or width Y1 in FIG. 5) is 3 mm.
  • the light distribution of the surface light emitting panel 20 is a Lambert light distribution (see FIG. 9).
  • the reflectance of the optical adjustment member 22 is 90%.
  • the transmittance of the optical adjustment member 22 is 0%.
  • the absorptance of the optical adjustment member 22 is 10%.
  • the width of the optical adjustment member 22 (width X1 or width Y1 in FIG. 5) is 2.83 mm.
  • the optical adjustment member 22 is provided with openings at random, and has a pattern with a predetermined opening ratio and a predetermined opening width in the longitudinal direction of the cross section (that is, the left and right direction in FIG. 2). .
  • FIG. 12 is a graph showing the aperture ratio and the aperture width of the optical adjustment member 22 in Example 5.
  • the horizontal axis shown in the graph of FIG. 12 indicates the position of the optical adjustment member 22 with respect to the longitudinal direction of the cross section of the optical adjustment member 22.
  • the position “0” on the horizontal axis corresponds to the center of the optical adjustment member 22.
  • FIG. 12 shows two of the aperture ratio of the optical adjustment member 22 and the aperture width of the optical adjustment member 22.
  • the “aperture ratio” here refers to the ratio of the opening width to the predetermined width.
  • the “opening width” refers to the width of each hole provided in the predetermined width.
  • FIG. 13 is a diagram illustrating luminance profiles of the surface light emitting unit 200 according to the comparative example and the surface light emitting units according to the first and second embodiments.
  • FIG. 14 is a diagram showing luminance profiles of the surface light emitting unit 200 according to the comparative example and the surface light emitting units according to the examples 3 to 5.
  • the horizontal axis shown in the graphs of FIG. 13 and FIG. 14 indicates the position of the diffusing member 26 in the left-right direction in FIG.
  • the position “0” on the horizontal axis corresponds to the center position of the diffusion member 26.
  • the vertical axis shown in the graphs of FIGS. 13 and 14 indicates the normalized luminance with the luminance at the brightest position (that is, position 0 mm) as 1000.
  • the normalized luminance is the luminance on the diffusing member 26.
  • the brightness of the region corresponding to the non-light emitting region RB (that is, the position of less than ⁇ 1.75 mm and 1.75 mm or more) is higher in all of Examples 1 to 5 than in the comparative example. Is also high. That is, it can be seen that the relative luminance of the non-light-emitting area RB with respect to the light-emitting area RA is increased, and the non-light-emitting area RB is less conspicuous than the light-emitting area RA.
  • the surface light emitting unit described above includes a surface light emitting panel having a light emitting surface, a first transmissive member having a front surface and a back surface, and the light emitting surface and the back surface being opposed to each other; An optical adjustment member for reducing light from the surface of the first transmission member, and a surface opposite to the first transmission member side of the optical adjustment member.
  • An optical adjustment member for reducing light from the surface of the first transmission member, and a surface opposite to the first transmission member side of the optical adjustment member.
  • the light emitting surface of the surface light emitting panel includes a light emitting region that emits light and a non-light emitting region that is located on the outer periphery of the light emitting region and does not emit light. At least a portion of the optical adjustment member is provided to face the light emitting region.
  • the width in the predetermined direction within the surface of the optical adjustment member is shorter than the width in the predetermined direction of the light emitting region in at least one direction within the surface
  • the distance between the surface light-emitting panel and the diffusing member is longer than the width in a predetermined direction of the region not covered by the optical adjustment member in the light emitting region.
  • the surface light emitting unit further includes a second transmission member having a front surface and a back surface and provided between the optical adjustment member and the diffusion member.
  • the light emitting surface of the surface light emitting panel is in contact with the back surface of the first transmission member.
  • the surface of the first transmission member is in contact with one surface of the optical adjustment member.
  • the other surface of the optical adjustment member is in contact with the back surface of the second transmission member.
  • the surface of the second transmission member is in contact with one surface of the diffusion member.
  • a reflective member is provided on the non-light emitting area of the surface light emitting panel.
  • the luminance on the front side along the optical axis extending in the normal direction of the light emitting surface is set to 1.
  • the light distribution curve has at least a portion satisfying the condition of L> cos ⁇ .
  • the surface light emitting unit can make the non-light emitting region less noticeable than the conventional one while keeping the thickness thin.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Electroluminescent Light Sources (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne une unité d'émission de lumière de surface qui est capable de rendre une zone non émettrice de lumière moins perceptible que des unités d'émission de lumière de surface classiques, tout en conservant une épaisseur mince. Une unité d'émission de lumière de surface (100) est dotée : d'un panneau d'émission de lumière de surface (20) comportant une surface d'émission de lumière qui comprend une zone d'émission de lumière (RA) qui émet de la lumière et une zone non émettrice de lumière (RB) qui est positionnée autour de la zone d'émission de lumière (RA) et n'émet pas de lumière; un élément transmetteur (21) qui possède une surface avant (21A) et une surface arrière (21B) et qui est agencé de telle sorte que la surface arrière (21B) fait face à la surface d'émission de lumière; un élément de commande optique (22) qui est agencé de manière à faire face à la surface avant (21A) de l'élément transmetteur (21) dans le but d'atténuer la lumière provenant de la surface avant (21A) de l'élément transmetteur (21); ainsi qu'un élément de diffusion (26) qui est agencé de manière à faire face à une surface de l'élément de commande optique (22), ladite surface se trouvant sur le côté opposé de l'élément transmetteur (21) - sur la surface latérale de l'élément de commande optique (22). Au moins une partie de l'élément de commande optique (22) est prévue de manière à faire face à la zone d'émission de lumière (RA). La largeur (LA) de l'élément de commande optique (22) dans une direction prédéterminée dans le plan est plus petite que la largeur (LC) de la zone d'émission de lumière (RA) dans la direction prédéterminée mentionnée ci-dessus au moins dans une direction dans le plan.
PCT/JP2015/080511 2014-11-19 2015-10-29 Unité d'émission de lumière de surface WO2016080169A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016560137A JPWO2016080169A1 (ja) 2014-11-19 2015-10-29 面発光ユニット

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014234749 2014-11-19
JP2014-234749 2014-11-19

Publications (1)

Publication Number Publication Date
WO2016080169A1 true WO2016080169A1 (fr) 2016-05-26

Family

ID=56013723

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/080511 WO2016080169A1 (fr) 2014-11-19 2015-10-29 Unité d'émission de lumière de surface

Country Status (2)

Country Link
JP (1) JPWO2016080169A1 (fr)
WO (1) WO2016080169A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017217111A1 (fr) * 2016-06-14 2017-12-21 コニカミノルタ株式会社 Module émetteur de lumière

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010033780A (ja) * 2008-07-25 2010-02-12 Panasonic Electric Works Co Ltd 有機エレクトロルミネッセンス素子及び有機エレクトロルミネッセンス素子の発光色調整方法
JP2014110102A (ja) * 2012-11-30 2014-06-12 Konica Minolta Inc 面発光ユニット

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010033780A (ja) * 2008-07-25 2010-02-12 Panasonic Electric Works Co Ltd 有機エレクトロルミネッセンス素子及び有機エレクトロルミネッセンス素子の発光色調整方法
JP2014110102A (ja) * 2012-11-30 2014-06-12 Konica Minolta Inc 面発光ユニット

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017217111A1 (fr) * 2016-06-14 2017-12-21 コニカミノルタ株式会社 Module émetteur de lumière

Also Published As

Publication number Publication date
JPWO2016080169A1 (ja) 2017-08-24

Similar Documents

Publication Publication Date Title
JP6370537B2 (ja) 照明装置
US9053650B2 (en) Backlight unit and display apparatus thereof
WO2008050504A1 (fr) Dispositif d'éclairage et affichage à cristaux liquides
US11693273B2 (en) Light source module and display device
JP2019215956A (ja) 面状照明装置
TWI413820B (zh) 照明裝置與導光板
WO2014083972A1 (fr) Dispositif d'éclairage
JP2010078980A (ja) 光制御スタック及びそれを用いたバックライトユニット、表示装置
TWM467800U (zh) 薄型直下式光源裝置
WO2016080169A1 (fr) Unité d'émission de lumière de surface
JP5846345B1 (ja) 面状発光ユニット
KR101829306B1 (ko) 조명장치
JP6507588B2 (ja) 面発光ユニット
JP2015230841A (ja) 面発光ユニット
JP2014002968A (ja) 照明装置
WO2017104081A1 (fr) Dispositif d'affichage
KR101947532B1 (ko) 조명장치
JP2010015833A (ja) 光学機能部材
TW201510620A (zh) 薄型直下式背光模組
JP2008225228A (ja) 光学シートとそれを用いたバックライト・ユニットおよびディスプレイ
JP2017091868A (ja) 面発光モジュールおよび照明装置
JPH03264982A (ja) 面発光装置
JP2011198760A (ja) 導光板、表示体および自動車用表示灯
KR102092881B1 (ko) 조명 장치
KR102222649B1 (ko) 조명 장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15860747

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2016560137

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15860747

Country of ref document: EP

Kind code of ref document: A1