WO2012030085A1 - Unité de rétro-éclairage et procédé pour la produire - Google Patents

Unité de rétro-éclairage et procédé pour la produire Download PDF

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Publication number
WO2012030085A1
WO2012030085A1 PCT/KR2011/006056 KR2011006056W WO2012030085A1 WO 2012030085 A1 WO2012030085 A1 WO 2012030085A1 KR 2011006056 W KR2011006056 W KR 2011006056W WO 2012030085 A1 WO2012030085 A1 WO 2012030085A1
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WO
WIPO (PCT)
Prior art keywords
backlight unit
optical path
guide plate
path shift
unit according
Prior art date
Application number
PCT/KR2011/006056
Other languages
English (en)
Inventor
Kyoung Soo Ahn
Sang Jun Park
Kyoung Jong Yoo
Jong Sun Kim
Original Assignee
Lg Innotek Co., Ltd.
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 Lg Innotek Co., Ltd. filed Critical Lg Innotek Co., Ltd.
Publication of WO2012030085A1 publication Critical patent/WO2012030085A1/fr

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Classifications

    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0025—Diffusing sheet or layer; Prismatic sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02F1/133603—Direct backlight with LEDs
    • 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

Definitions

  • the present disclosure relates to a backlight unit and a method for manufacturing the backlight unit.
  • Cold cathode fluorescent lamps had been widely used as backlight light sources of liquid crystal displays (LCDs) owing to their inexpensive prices and easy-to-assemble characteristics.
  • cold cathode fluorescent lamps have demerits such as mercury-related environmental problems, low response time, and poor color reproduction characteristics.
  • LEDs light emitting diodes
  • Backlight units can be classified into edge type backlight units and direct type backlight units.
  • edge type backlight units light is incident on a side of a light guide plate, and the light is guided to a panel through the top surface of the light guide plate.
  • an LED is disposed at a backside of a diffusion plate, and light emitted from the LED is supplied to a panel through the diffusion plate.
  • edge type backlight units can be easily made in thin shapes, it is difficult to ensure light uniformity if the size of a liquid crystal panel is large.
  • direct type backlight units into thin shapes due to a distance between an LED and a diffusion plate although direct type backlight units can be easily made in large sizes.
  • Embodiments provide a backlight unit configured to prevent locally concentrated light emission from a light guide plate.
  • a backlight unit including: a light guide plate in which a plurality of grooves are formed; a plurality of side emitting type light emitting devices inserted in the grooves, respectively; and optical path shift layers disposed in the grooves to shift optical paths of light emitted from the side emitting type light emitting devices.
  • a backlight unit including: a light guide plate in which a plurality of openings are formed; a plurality of side emitting type light emitting devices inserted in the openings, respectively; and optical path shift layers configured to seal the openings and shift optical paths of light emitted from the side emitting type light emitting devices.
  • the optical path shift layers are disposed in the grooves where the side emitting type light emitting devices are inserted, so as to shift optical paths of light emitted from the side emitting type light emitting devices. This prevents locally concentrated emission of light from the light guide plate, and thus brightness irregularity can be reduced.
  • beads may be dispersed in the optical path shift layers to irregularly reflect light emitted from the side emitting type light emitting devices and thus to prevent locally concentrated light emission from the light guide plate. Therefore, hot spots can be reduced.
  • Fig. 1 is a schematic sectional view illustrating a backlight unit according to an embodiment.
  • Fig. 2 is a schematic sectional view illustrating a comparison example of the backlight unit of the embodiment.
  • Fig. 3 is a schematic sectional view for explaining light propagation paths in the comparison example of the backlight unit of the embodiment.
  • Fig. 4 is a schematic sectional view for explaining light propagation paths in the backlight unit of the embodiment.
  • Fig. 5 is a schematic partial sectional view illustrating a backlight unit according to a first embodiment.
  • Fig. 6 is a schematic partial sectional view illustrating a backlight unit according to a second embodiment.
  • Fig. 7 is a schematic partial sectional view illustrating a backlight unit according to a third embodiment.
  • Figs. 8A to 8C are schematic partial sectional views illustrating a backlight unit according to a fourth embodiment.
  • Fig. 9 is a schematic partial sectional view illustrating a backlight unit according to a fifth embodiment.
  • Figs. 10A to 10D are schematic sectional views for explaining a method for manufacturing a backlight unit according to an embodiment.
  • Fig. 11 is a schematic partial sectional view illustrating a backlight unit according to a sixth embodiment.
  • Fig. 1 is a schematic sectional view illustrating a backlight unit according to an embodiment.
  • the backlight unit of the embodiment includes: a light guide plate 100 in which a plurality of grooves 110 are formed; a plurality of side emitting type light emitting devices 310 inserted in the grooves 110, respectively; and optical path shift layers 200 disposed at the grooves 110 to shift optical paths of light emitted from the side emitting type light emitting devices 310.
  • the light guide plate 100 may be formed of a transparent material.
  • the light guide plate 100 may be formed of one of an acrylic resin-based material such as polymethylmethacrylate (PMMA), a polyethylene terephthalate (PET) resin, a poly carbonate (PC) resin, and a polyethylene naphthalate (PEN) resin.
  • PMMA polymethylmethacrylate
  • PET polyethylene terephthalate
  • PC poly carbonate
  • PEN polyethylene naphthalate
  • the side emitting type light emitting devices 310 may include light emitting diodes (LEDs).
  • the LEDs may be color LEDs capable of emitting at least one of red light, blue light, green light, and white light, or may be ultraviolet (UV) LEDs.
  • the color LEDs may include a combination of red, blue, green, and white LEDs. Arrangement of the color LEDs and light types of the color LEDs may be changed within the technical scope of the embodiment.
  • a printed circuit board (PCB) 300 on which the side emitting type light emitting devices 310 are disposed may be disposed under the light guide plate 100.
  • the PCB 300 may be a metal core PCB, an FR-4 PCB, a general PCB, a flexible PCB, or a ceramic PCB.
  • the PCB 300 is not limited thereto, but may be any other PCB in the technical scope of the embodiments.
  • the grooves 110 are formed in the bottom surface of the light guide plate 100 to receive the side emitting type light emitting devices 310, and the optical path shift layers 200 are disposed on the inner walls of the grooves 110.
  • Optical paths of light emitted from the side emitting type light emitting devices 310 are shifted (i.e., changed) at the optical path shift layers 200, and then the light is incident on the light guide plate 100. Thereafter, the light is guide to the outside through the light guide plate 100.
  • the light the light paths of which are shifted at the optical path shift layers 200 is uniformly distributed throughout the light guide plate 100 and is then guided to the outside. Therefore, the light discharged from the light guide plate 100 does not cause a hot spot, and thus brightness irregularity can be reduced.
  • the optical path shift layers 200 is disposed at the grooves 110 where the side emitting type light emitting devices 310 are inserted, so as to shift optical paths of light emitted from the side emitting type light emitting devices 310. This prevents locally concentrated emission of light from the light guide plate 100. Therefore, brightness irregularity can be reduced.
  • the optical path shift layers 200 may be formed of a resin such as an acryl-containing resin and a silicon-containing resin.
  • the optical path shift layers 200 may have a refractive index different from that of the light guide plate 100. Light emitted from the side emitting type light emitting devices 310 may be incident onto the optical path shift layers 200 through air layers and be refracted at the optical path shift layers 200. In this way, optical paths of light emitted from the side emitting type light emitting devices 310 are shifted.
  • the refractive index of the optical path shift layers 200 may be larger or smaller than that of the light guide plate 100.
  • Fig. 4 is a schematic sectional view for explaining light propagation paths in the backlight unit of the embodiment.
  • an optical path shift layer is not disposed at grooves 110 where side emitting type light emitting devices 310 are inserted.
  • rays A and B emitted from the side emitting type light emitting device 310 are incident onto the light guide plate 100 through an air layer and are discharged to the outside through a region (K).
  • light emitted from the comparison example may have brightness irregularity due to a hot spot.
  • the optical path shift layers 200 are disposed at the grooves 110 of the light guide plate 100, light rays A1 and B1 emitted from the side emitting type light emitting device 310 propagate through an air layer and are refracted at the optical path shift layer 200. That is, the optical paths of the light rays A1 and B1 are shifted at the optical path shift layer 200, and thus the light rays A1 and B1 are not concentrated at a region of the light guide plate 100 as shown in Fig. 4.
  • the light rays A1 and B1 are discharged through the light guide plate 100, the light rays A1 and B1 are not concentrated at a specific region of the light guide plate 100. Accordingly, when light is emitted from the backlight unit, hot spots can be reduced, and thus brightness irregularity can be prevented.
  • Fig. 5 is a schematic partial sectional view illustrating a backlight unit according to a first embodiment
  • Fig. 6 is a schematic partial sectional view illustrating a backlight unit according to a second embodiment.
  • optical path shift layers 211 and 212 are disposed in partial regions of a groove 110 of a light guide plate 100.
  • the optical path shift layers 211 and 212 are disposed in predetermined regions of the groove 110 of the light guide plate 100.
  • the optical path shift layers 211 and 212 may be coated on predetermined regions of the inner wall of the groove 110 of the light guide plate 100.
  • the predetermined regions of the groove 110 of the light guide plate 100 may be partial regions of the groove 110.
  • the predetermined regions of the groove 110 may be inner wall regions of the groove 110 that are spaced apart from each other.
  • optical path shift layers 211 and 212 may cover mutually-facing corners of the groove 110 as shown in Fig. 5.
  • the optical path shift layers 211 and 212 are disposed in partial regions of the groove 110 of the light guide plate 100.
  • the positions of the optical path shift layers 211 and 212 are not limited to the positions shown in Fig. 5. That is, the optical path shift layers 211 and 212 may be disposed at any positions so long as hot spots and brightness irregularity of light emitted from the backlight unit can be reduced.
  • an uneven pattern 201 is formed on an optical path shift layer 200.
  • the uneven pattern 201 may change optical paths of light emitted from a side emitting type light emitting device 310. That is, light may be variously scattered according to the shape of the uneven pattern 201, and thus optical paths may also be variously changed to reduce hot spots when light is discharged from the backlight unit.
  • Fig. 7 is a schematic partial sectional view illustrating a backlight unit according to a third embodiment.
  • beads 220 are dispersed in an optical path shift layer 200.
  • the beads 220 irregularly reflects light emitted from a side emitting type light emitting device 310 so that locally concentrated emission from a light guide plate 100 can be prevented. Therefore, hot spots can be reduced.
  • the beads 220 may be formed of at least one of acryl, silicon, glass, and polystyrene.
  • Figs. 8A to 8C are schematic partial sectional views illustrating a backlight unit according to a fourth embodiment
  • Fig. 9 is a schematic partial sectional view illustrating a backlight unit according to a fifth embodiment.
  • the backlight unit of the fourth embodiment includes: a light guide plate 100 in which a plurality of openings 111 are formed; a plurality of side emitting type light emitting devices 310 inserted in the openings 111, respectively; and optical path shift layers 200 sealing the openings 111 and shifting optical paths of light emitted from the side emitting type light emitting devices 310.
  • the openings 111 of the light guide plate 100 are closed by the optical path shift layers 200, light emitted from the side emitting type light emitting devices 310 is discharged to the outside through the optical path shift layers 200 or the light guide plate 100.
  • the optical path shift layers 200 may be spaced apart from the side emitting type light emitting devices 310 so that air layers can be formed between the optical path shift layers 200 and the side emitting type light emitting devices 310.
  • the optical path shift layers 200 may be in contact with the side emitting type light emitting devices 310, and thus air layers may not be formed among the side emitting type light emitting devices 310, the optical path shift layers 200, and the light guide plate 100.
  • the optical path shift layers 200 may partially cover the side emitting type light emitting devices 310 as shown in Fig. 8B or entirely cover the side emitting type light emitting devices 310 as shown Fig. 8C.
  • the backlight unit of the fifth embodiment may include: a light guide plate 100 in which a plurality of grooves 110 are formed; a plurality of side emitting type light emitting devices 310 inserted in the grooves 110, respectively; and optical path shift layers 200 covering the side emitting type light emitting devices 310 and shifting optical paths of light emitted from the side emitting type light emitting devices 310.
  • the optical path shift layer 200 covers the surface of the side emitting type light emitting device 310 and is spaced a predetermined distance from the sidewall of the groove 110 of the light guide plate 100 so that an air layer can be formed between the optical path shift layer 200 and the light guide plate 100.
  • Figs. 10A to 10D are schematic sectional views for explaining a method for manufacturing a backlight unit according to an embodiment.
  • a plurality of side emitting type light emitting devices 310 are disposed on a PCB 300 as shown in Fig. 10A.
  • a light guide plate 100 in which a plurality of grooves 110 are formed is prepared (refer to Fig. 10B).
  • optical path shift layers 200 are formed in the grooves 110 of the light guide plate 100 to shift optical paths of light emitted from the side emitting type light emitting devices 310 (refer to Fig 10C).
  • the optical path shift layers 200 may be formed on the entire inner walls of the grooves 110 as shown in Fig. 1 or partial regions of the inner walls of the grooves 110 as shown in Fig. 5. In the latter case, the optical path shift layers 200 may be formed on mutually-facing corner regions of the inner walls of the grooves 110. In addition, the optical path shift layers 200 may have uneven surfaces as shown in Fig. 6.
  • the optical path shift layers 200 may be formed ofoneoftheabove-describedmentionedmaterials.
  • the light guide plate 100 is aligned with the PCB 300 so that the side emitting type light emitting devices 310 can be inserted into the grooves 110 of the light guide plate 100 (refer to Fig. 10D).
  • a fixation process such as a coupling or bonding process may be performed to fix the light guide plate 100 to the PCB 300.
  • Fig. 11 is a schematic partial sectional view illustrating a backlight unit according to a sixth embodiment.
  • a pattern 101 is disposed on a light guide plate 100 facing a PCB 300 to discharge light incident onto the light guide plate 100.
  • the backlight unit includes: a shift layer 200 on the inner wall of a groove 110 formed in the light guide plate 100; and a reflection plate 320 on the bottom surface of the light guide plate 100.
  • the pattern 101 is formed on the light guide plate 100, and the reflection plate 320 is disposed on the bottom surface of the light guide plate 100. Therefore, light incident onto the reflection plate 320 and light reflected from the reflection plate 320 to the light guide plate 100 can be scattered at the pattern 101. Therefore, light can be discharged from the backlight unit without hot spots.
  • the optical path shift layers are disposed in the grooves where the side emitting type light emitting devices are inserted, so as to shift optical paths of light emitted from the side emitting type light emitting devices. This prevents locally concentrated emission of light from the light guide plate, and thus brightness irregularity can be reduced.
  • beads may be dispersed in the optical path shift layers to irregularly reflect light emitted from the side emitting type light emitting devices and thus to prevent locally concentrated light emission from the light guide plate. Therefore, hot spots can be reduced.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention concerne une unité de rétro-éclairage et un procédé pour la produire. Ladite unité de rétro-éclairage comprend une plaque guide de lumière dans laquelle plusieurs rainures sont formées, plusieurs dispositifs électroluminescents de type à émission latérale qui sont introduits dans les rainures, respectivement et des couches de décalage de parcours optique, disposées dans les rainures afin de décaler les parcours optiques de la lumière émise à partir des dispositifs électroluminescents de type à émission latérale.
PCT/KR2011/006056 2010-09-03 2011-08-17 Unité de rétro-éclairage et procédé pour la produire WO2012030085A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020100086260A KR20120023345A (ko) 2010-09-03 2010-09-03 백라이트 유닛 및 그의 제조 방법
KR10-2010-0086260 2010-09-03

Publications (1)

Publication Number Publication Date
WO2012030085A1 true WO2012030085A1 (fr) 2012-03-08

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PCT/KR2011/006056 WO2012030085A1 (fr) 2010-09-03 2011-08-17 Unité de rétro-éclairage et procédé pour la produire

Country Status (3)

Country Link
KR (1) KR20120023345A (fr)
TW (1) TWI450001B (fr)
WO (1) WO2012030085A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9874673B2 (en) 2014-11-03 2018-01-23 Boe Technology Group Co., Ltd. Backlight module and display device
WO2020096236A1 (fr) * 2018-11-07 2020-05-14 삼성전자주식회사 Dispositif d'affichage
JP7477782B2 (ja) 2022-03-04 2024-05-02 日亜化学工業株式会社 面状光源

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102818196B (zh) * 2012-08-24 2015-03-25 京东方科技集团股份有限公司 背光模组和显示装置

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JP2004170698A (ja) * 2002-11-20 2004-06-17 Toyota Industries Corp 光学部材及びバックライトユニット並びに光学部材の製造方法
JP2004241237A (ja) * 2003-02-05 2004-08-26 Sharp Corp 面状照明装置およびこれを使用した液晶表示装置
JP2007524206A (ja) * 2004-02-11 2007-08-23 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 発光体
KR20090073452A (ko) * 2007-12-31 2009-07-03 엘지디스플레이 주식회사 액정 표시 장치

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Publication number Priority date Publication date Assignee Title
JP2004170698A (ja) * 2002-11-20 2004-06-17 Toyota Industries Corp 光学部材及びバックライトユニット並びに光学部材の製造方法
JP2004241237A (ja) * 2003-02-05 2004-08-26 Sharp Corp 面状照明装置およびこれを使用した液晶表示装置
JP2007524206A (ja) * 2004-02-11 2007-08-23 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 発光体
KR20090073452A (ko) * 2007-12-31 2009-07-03 엘지디스플레이 주식회사 액정 표시 장치

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9874673B2 (en) 2014-11-03 2018-01-23 Boe Technology Group Co., Ltd. Backlight module and display device
WO2020096236A1 (fr) * 2018-11-07 2020-05-14 삼성전자주식회사 Dispositif d'affichage
US11347105B2 (en) 2018-11-07 2022-05-31 Samsung Electronics Co., Ltd. Display device including light guide plate with a plurality of accommodating spaces formed
JP7477782B2 (ja) 2022-03-04 2024-05-02 日亜化学工業株式会社 面状光源

Also Published As

Publication number Publication date
TW201215968A (en) 2012-04-16
KR20120023345A (ko) 2012-03-13
TWI450001B (zh) 2014-08-21

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