WO2012102096A1 - Appareil d'éclairage du type à émission latérale et appareil d'affichage - Google Patents

Appareil d'éclairage du type à émission latérale et appareil d'affichage Download PDF

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Publication number
WO2012102096A1
WO2012102096A1 PCT/JP2012/050575 JP2012050575W WO2012102096A1 WO 2012102096 A1 WO2012102096 A1 WO 2012102096A1 JP 2012050575 W JP2012050575 W JP 2012050575W WO 2012102096 A1 WO2012102096 A1 WO 2012102096A1
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WO
WIPO (PCT)
Prior art keywords
light
led
edge
light type
substrate
Prior art date
Application number
PCT/JP2012/050575
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English (en)
Japanese (ja)
Inventor
時児 中川
Original Assignee
シャープ株式会社
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 シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2012102096A1 publication Critical patent/WO2012102096A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0085—Means for removing heat created by the light source from the package
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133628—Illuminating devices with cooling means

Definitions

  • the present invention relates to an edge light type illumination device and a display device, and more particularly to an edge light type illumination device suitable as a surface light source for a liquid crystal display device and the like and a display device using the same.
  • An edge light type (sometimes referred to as a side light type) illumination device is widely used as a backlight for irradiating a display panel with external light in a display device such as a liquid crystal display device.
  • a device using an LED (light emitting diode) as a light source of such an edge light type illumination device has an advantage of a long life and high light emission efficiency, and thus attracts particular attention.
  • FIG. 5 and FIG. 6 are an exploded perspective view and a cross-sectional view of the main part showing a schematic configuration of a liquid crystal display device provided with an edge light type illumination device using such LEDs.
  • the liquid crystal display device 100 includes a bezel 102, a liquid crystal display panel 103, and an illumination device 104.
  • the bezel 102 has a frame shape that covers the periphery of the liquid crystal display panel 103, and ensures the strength of the entire liquid crystal display device 100 together with the chassis 114.
  • the liquid crystal display panel 103 is formed by bonding two pieces of glass and sealing the liquid crystal therebetween, so that an image can be displayed on the front surface.
  • the illuminating device 104 includes a chassis 114 having a shallow box shape. Inside the chassis 114, an LED substrate on which optical sheets 107 to 109, a light guide plate 111, a reflection sheet 110, and a plurality of LEDs 121 are mounted. 120 can be stored. The optical sheets 107 to 109, the light guide plate 111, the reflection sheet 110, the LED substrate 120, and the like are fixed in the chassis 114 by the frame 105.
  • the light guide plate 111 has a light incident surface 111a for introducing light from the LEDs 121 of the LED substrate 120, and light introduced from the light incident surface 111a upward (irradiation direction).
  • the light incident surface 111 a is configured by a predetermined side end surface of the light guide plate 111, and the light emitting surface 111 b is configured by the front surface of the light guide plate 111.
  • FIG. 7 is an explanatory diagram showing a part of the LED substrate and the light guide plate of FIG. 6 and a state seen from the light emitting surface side.
  • the liquid crystal display device has a narrow frame structure
  • the distance between the LED 121 and the light incident surface 111a of the light guide plate 111 is reduced.
  • the portion 131 corresponding to the portion where the LED 121 is not provided becomes darker than the portion 130 corresponding to the portion where the LED 121 is provided, resulting in luminance unevenness that becomes bright and dark at the pitch of the LED 121.
  • the luminance unevenness as described above occurs in the lighting device, the display quality of the display device is degraded.
  • the gap between the LED 121 and the light guide plate 111 is reduced, the cooling efficiency is deteriorated, and there is a problem that the LED 121 may malfunction due to heat generation.
  • Patent Document 1 a method of improving luminance unevenness by attaching a member obtained by laminating a reflection sheet to a metal plate to the side surface of a light guide plate and inserting an LED package into a hole provided there Has been proposed (see Patent Document 1).
  • Patent Document 1 has a problem in that the cost increases because it is necessary to prepare a laminated member and the number of parts increases. Further, the increase in the number of components makes the assembly work complicated in terms of mounting.
  • the problem to be solved by the present invention is that the edge light type illumination device can be narrowed in frame, does not cause uneven brightness due to LEDs, and can emit uniform light as a surface light source.
  • an object is to provide an edge light type illumination device and a display device that are low in cost, easy to assemble, and have good mounting workability.
  • the edge light type illumination device of the present invention is an edge light type illumination device including a light guide plate and an LED light source disposed in a side surface direction of the light guide plate, and the LED
  • the gist of the light source is that a plurality of recesses are provided in a heat-radiating substrate, and LEDs are embedded in the recesses.
  • the substrate of the LED light source is formed as a flat portion around the concave portion, or the surface of the LED embedded in the concave portion is the flat portion. It is preferable that it is arranged so as to be the same as the surface or inside the surface of the flat part, that the substrate is made of metal, or that the substrate is made of aluminum.
  • a reflective layer is provided around the concave portion of the substrate.
  • the gist of the display device of the present invention is that the above-described edge light type illumination device is used as an external light irradiation device for a display panel.
  • the display panel is a liquid crystal display device.
  • the edge light type illumination device of the present invention adopts the above-described configuration, so that even when the frame is narrowed, the gap with the LED light guide plate is secured to prevent uneven brightness and to emit uniform light. Irradiation is possible. Furthermore, the edge light type illumination device of the present invention does not have a complicated structure and may have a simple structure and does not require accuracy of parts and assembly. Therefore, the assembly of the device is easy and the device can be provided at a low cost.
  • edge light type illumination device of the present invention can secure the space between the LED and the light guide plate, the cooling efficiency is improved, the deformation of the light guide plate due to heat is prevented, and uniform light irradiation is stabilized. Can be done.
  • the display device of the present invention uses the above-described edge light type illumination device as an external light irradiation device, it is possible to prevent occurrence of luminance unevenness even if the frame is narrowed. Furthermore, the luminance of the display device can be improved, and a display image with excellent display quality without luminance unevenness can be obtained. Furthermore, the light emission efficiency of the lighting device can be improved and stable light emission is possible.
  • FIG. 1 It is a disassembled perspective view which shows schematic structure of one Example of the liquid crystal display device provided with the edge light type illuminating device of this invention. It is principal part sectional drawing of the liquid crystal display device of FIG. It is a perspective view which shows the external appearance of the LED light source of the edge light type illuminating device of FIG. (A) is the front view which looked at a part of LED light source of FIG. 3 from the light emission surface side, (b) is BB sectional drawing of (a). It is a disassembled perspective view which shows schematic structure of the liquid crystal display device provided with the conventional edge light type illuminating device. It is sectional drawing of the principal part which shows schematic structure of the liquid crystal display device provided with the conventional edge light type illuminating device.
  • FIG. 1 is an exploded perspective view schematically showing a liquid crystal display device as an embodiment of the display device of the present invention
  • FIG. 2 is a cross-sectional view of the main part of the liquid crystal display device of FIG.
  • the liquid crystal display device 1 includes a liquid crystal display panel 3 as a display panel, and an edge light type illumination device (hereinafter simply referred to as illumination device) for irradiating the liquid crystal display panel 3 with light. 4), and these are integrally held by the bezel 2 or the like.
  • the bezel 2 has a frame shape that covers the periphery of the liquid crystal display panel 3, and ensures the strength of the entire liquid crystal display device 1 together with the chassis 14 included in the illumination device 4.
  • the liquid crystal display panel 3 has a horizontally long rectangular shape when viewed from above.
  • a pair of glass substrates comprising a thin film transistor (TFT) array substrate and a color filter (CF) substrate are bonded together in parallel at a predetermined interval, and a liquid crystal is sandwiched between the glass substrates. It has a sealed configuration.
  • TFT thin film transistor
  • CF color filter
  • the liquid crystal display panel 3 has a plurality of TFTs and pixel electrodes formed in a matrix on a TFT array substrate. A plurality of colored patterns are formed in a matrix on the CF substrate, and a common electrode is formed on almost the entire surface.
  • the liquid crystal display panel 3 can display an image by changing the voltage applied between the pixel electrode and the common electrode to control the orientation of the liquid crystal.
  • a polarizing plate (not shown) is provided on each of the front and back surfaces of the liquid crystal display panel 3.
  • the illumination device 4 may be a so-called edge light type (side light type) in which an LED light source 20 in which a plurality of LEDs (light emitting diodes) 23 are mounted on a substrate 21 is arranged in the side surface direction of the liquid crystal display panel 3. ) Lighting device.
  • the illumination device 4 includes a substantially box-shaped chassis 14 having an opening that opens toward the liquid crystal display panel 3 side, and optical sheets 7 to 9 arranged so as to cover the opening of the chassis 14. Further, inside the chassis 14, an LED light source 20 serving as a light emission source, a light guide plate 11 that guides light from the LED light source 20 to the liquid crystal display panel 3 side, and a reflection disposed on the back side of the light guide plate 11. And a sheet 10.
  • the light guide plate 11 is composed of a transparent resin plate having a thickness of about 3 to 4 mm, for example.
  • the light guide plate 11 includes a light incident surface 11a for introducing light from the LED light source 20, and a light emitting surface 11b for emitting light introduced from the light incident surface 11a upward (irradiation direction). Have.
  • FIG. 3 is a perspective view showing the appearance of the LED light source of FIG.
  • a plurality of concave portions 22 are provided in a horizontally long strip-shaped substrate 21 having heat dissipation properties, and the LEDs 23 are embedded in the concave portions 22.
  • the plurality of recesses 22 are provided in a straight line at predetermined intervals along the longitudinal direction of the substrate 21.
  • the LED 23 has a package structure in which, for example, an LED chip that generates blue light is sealed with a transparent resin mixed with a yellow phosphor, and white light can be emitted from the light emitting surface 23a of the LED 23. Yes. As shown in FIG. 2, the LED 23 is disposed on the substrate 21 so that the light emitting surface 23 a faces the light incident surface 11 a of the light guide plate 11 when the LED light source 20 is mounted in the chassis 14.
  • FIG. 4A is a front view of a part of the LED light source of FIG. 3 as viewed from the light emitting surface side
  • FIG. 4B is a cross-sectional view taken along the line BB of FIG.
  • the substrate 21 of the LED light source 20 is formed as a flat portion 24 having a flat surface around the recess 22.
  • the periphery of the recess 22 includes the right and left of the recess 22 that is the substrate longitudinal direction (left and right direction) in FIG. 4B, the space between the recesses 22, and the top and bottom of the recess 22 that is the substrate short direction.
  • the surface of the LED 23 is substantially flush with the flat portion 24 or inside the flat portion 24 so that the LED 23 does not protrude from the flat portion 24 of the substrate 21. Is arranged.
  • an insulating layer 25 is formed on the light emitting surface side surface of the base material 21, and a wiring pattern 26 is formed on the insulating layer 25.
  • a reflection sheet 27 is laminated on the surface of the flat portion 24. That is, on the surface of the substrate 21 in the LED light source 20, the periphery of the LED 23 is formed as a flat portion 24, and a surface reflection layer made of the reflection sheet 27 is provided on the surface of the flat portion 24.
  • the LED 23 is mounted on the insulating layer 25, and the terminal of the LED 23 is connected to the wiring pattern 26.
  • the plurality of LEDs 23, 23,... Are connected in series by a wiring pattern 26.
  • the substrate 21 may be made of a material having a heat dissipation property, but it is preferable that the substrate 21 is made of metal because heat dissipation and workability are good, and it is particularly preferable that the substrate 21 is made of aluminum.
  • the substrate 21 may be formed with a concave portion 22 by cutting a plate-shaped material, or may be formed by casting or the like.
  • the reflection sheet 27 for example, a plastic sheet having a thickness of about 0.1 to 2 mm is used.
  • the reflection sheet 27 may be either specular reflection or irregular reflection.
  • the specular reflection reflecting sheet 27 include a polyester film on which a metal such as aluminum or silver is deposited.
  • a sheet or the like whose surface on the light guide plate side is painted white is used. Examples of such a sheet include a white polyester film, an ultra-white polyester film, an interface multiple reflection type reflection sheet, a porous PP, a finely foamed polyester sheet, and the like.
  • FIG. 8 is an explanatory view showing a part of the LED substrate and the light guide plate of the edge light type illumination device of the present invention, as seen from the light emitting surface side.
  • FIG. 8 corresponds to the relationship between the conventional LED substrate and the light guide plate of FIG.
  • the LED 23 of the LED light source 20 is embedded in the recess 22 of the heat radiating substrate 21, so that the space between the surface end of the LED 23 and the light guide plate 11 is provided.
  • This gap P2 can be secured larger than the conventional gap P1 (see FIG. 7).
  • the gap P2 between the LED 23 and the light guide plate 11 is increased, the space between the LED 23 and the light guide plate 11 is widened, so that the light emitted from the LED 23 is easily diffused between the LEDs 23 and 23. Therefore, the brightness unevenness which becomes light and dark for every pitch of LED23 like the past is improved.
  • Increasing the number of LEDs 23 and reducing the distance between the LEDs 23 improves the luminance unevenness, but increases the number of LEDs 23 to be mounted, increasing the cost, and improving the heat dissipation efficiency. descend.
  • the present invention even if the number of LEDs 23 mounted is the same as that of the conventional one, luminance unevenness can be improved, so that the problem of an increase in cost and a decrease in heat dissipation does not occur.
  • the area of the light guide plate 11 can be expanded to the LED light source 20 side.
  • luminance unevenness can be improved.
  • the LED 23 is embedded in the recess 22 of the heat dissipation substrate 21, heat generated in the LED 23 can be diffused through the heat dissipation substrate 21, so that the cooling efficiency is good and the light emission efficiency is improved. .
  • the substrate 21 of the LED light source 20 is compared with the case where the recess 21 is formed by laminating a plurality of substrates when the substrate 21 in which the recess 22 is formed of a heat dissipating material is composed of one member. Since the number of parts is small, it is advantageous in terms of cost.
  • the LED light source 20 has the reflection sheet 27 laminated on the flat portion 24, the reflectance between the LEDs 23 and 23 can be improved, and the luminance unevenness can be further improved.
  • the frame 5 includes an optical sheet such as a polarization selective reflection sheet 7, a lens sheet 8, a diffusion sheet 9, a light guide plate 11, and a reflection sheet 10 in this order. It is for fixing to the chassis 14 in a state of being laminated from above.
  • an optical sheet such as a polarization selective reflection sheet 7, a lens sheet 8, a diffusion sheet 9, a light guide plate 11, and a reflection sheet 10 in this order. It is for fixing to the chassis 14 in a state of being laminated from above.
  • the chassis 14 is formed into a shallow box shape by bending a metal plate made of aluminum or the like, and accommodates the optical sheets 7 to 9, the light guide plate 11, the reflection sheet 10, and the LED substrate 20 therein. You can do that.
  • the chassis 14 includes a bottom plate portion and side plate portions that rise from the outer edges of the four sides of the bottom plate portion.
  • the frame 5 and the bezel 2 can be fixed to the side plate portion by screws or the like.
  • the diffusion sheet 9 is for making the luminance distribution uniform by diffusing the light emitted from the light guide plate 11.
  • the lens sheet 8 is for increasing the front luminance by condensing the light emitted from the diffusion sheet 9.
  • the deflection selective reflection sheet 7 is for selectively reflecting the light emitted from the lens sheet 8 so that the light is not absorbed by the deflection plate.
  • light emitted from the LED 23 of the LED light source 20 enters the light guide plate 11 from the light incident surface 11 a of the light guide plate 11.
  • the light incident on the inside of the light guide plate 11 travels in the light guide plate 11 and is reflected by the reflection sheet 10, spreads in a planar shape inside, and is emitted in a planar shape from the light emitting surface 11 b of the light guide plate 11.
  • the planar light emitted from the light emitting surface 11 b passes through the diffusion sheet 9, the lens sheet 8, the polarization selective reflection sheet 7, etc., and improves the optical characteristics such as luminance and uniformity, and the liquid crystal display panel 3. Irradiated to the back side.
  • the display device of the present invention includes the illumination device as an external light irradiation device that irradiates external light to a display panel such as a liquid crystal display panel.
  • the display device of the present invention can be suitably used for a large television or the like as a liquid crystal display device.
  • the present invention can be optimally used for a liquid crystal cover device such as a television with a thin casing and a narrow frame.
  • the display device of the present invention is not limited to a liquid crystal display device, and any display device using various display panels can be used as long as the display device is configured by combining a display panel and an external light irradiation device. be able to.

Abstract

La présente invention concerne un appareil d'éclairage du type à émission latérale et un appareil d'affichage, les cadres dudit appareil pouvant être plus étroits, une luminosité irrégulière parmi les DEL ne se produisant pas, une lumière uniforme pouvant être émise comme source de lumière superficielle. Le coût dudit appareil est peu élevé, son assemblage aisé et son aptitude au montage de bonne qualité. L'appareil d'éclairage du type à émission latérale (10) est fabriqué par disposition d'une source de lumière à DEL (20) présentant une pluralité de sections évidées (22) formées sur une carte de circuit imprimé en forme de bande oblongue (21) à capacité de rayonnement de chaleur. Les DEL (23) sont insérées dans les sections évidées (22), dans la direction de face latérale d'une plaque de guidage de lumière (11). Un appareil d'affichage à cristaux liquides (1) est fabriqué par disposition de l'appareil d'éclairage du type à émission latérale (10) au niveau du côté face arrière d'un panneau d'affichage à cristaux liquides (3).
PCT/JP2012/050575 2011-01-24 2012-01-13 Appareil d'éclairage du type à émission latérale et appareil d'affichage WO2012102096A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011011535 2011-01-24
JP2011-011535 2011-01-24

Publications (1)

Publication Number Publication Date
WO2012102096A1 true WO2012102096A1 (fr) 2012-08-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017071304A1 (fr) * 2015-10-29 2017-05-04 京东方科技集团股份有限公司 Unité de rétroéclairage et dispositif d'affichage
WO2017179105A1 (fr) * 2016-04-11 2017-10-19 堺ディスプレイプロダクト株式会社 Dispositif source de lumière et dispositif d'affichage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006343541A (ja) * 2005-06-09 2006-12-21 Matsushita Electric Ind Co Ltd 表示装置
JP2007026916A (ja) * 2005-07-19 2007-02-01 Casio Comput Co Ltd 照明装置
JP2007150080A (ja) * 2005-11-29 2007-06-14 Mitsubishi Rayon Co Ltd 線状光源装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006343541A (ja) * 2005-06-09 2006-12-21 Matsushita Electric Ind Co Ltd 表示装置
JP2007026916A (ja) * 2005-07-19 2007-02-01 Casio Comput Co Ltd 照明装置
JP2007150080A (ja) * 2005-11-29 2007-06-14 Mitsubishi Rayon Co Ltd 線状光源装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017071304A1 (fr) * 2015-10-29 2017-05-04 京东方科技集团股份有限公司 Unité de rétroéclairage et dispositif d'affichage
US10393948B2 (en) 2015-10-29 2019-08-27 Boe Technology Group Co., Ltd. Backlight unit and display device
WO2017179105A1 (fr) * 2016-04-11 2017-10-19 堺ディスプレイプロダクト株式会社 Dispositif source de lumière et dispositif d'affichage

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