WO2014134841A1 - Module de rétroéclairage et dispositif d'affichage à cristaux liquides - Google Patents

Module de rétroéclairage et dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2014134841A1
WO2014134841A1 PCT/CN2013/072639 CN2013072639W WO2014134841A1 WO 2014134841 A1 WO2014134841 A1 WO 2014134841A1 CN 2013072639 W CN2013072639 W CN 2013072639W WO 2014134841 A1 WO2014134841 A1 WO 2014134841A1
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WO
WIPO (PCT)
Prior art keywords
light guide
guide plate
backlight module
light
plate
Prior art date
Application number
PCT/CN2013/072639
Other languages
English (en)
Chinese (zh)
Inventor
李全
Original Assignee
深圳市华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Publication of WO2014134841A1 publication Critical patent/WO2014134841A1/fr

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Classifications

    • 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
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames

Definitions

  • the present invention relates to the field of liquid crystal display technology, and more particularly to a backlight module and a liquid crystal display using the same.
  • the backlight module is an important component of the light source provided in the liquid crystal display, and is mainly composed of an LED lamp and a light guide plate for conducting light emitted from the LED lamp to a specified position.
  • the distance from the light emitting surface of the LED lamp to the light incident surface of the light guide plate is referred to as the coupling distance.
  • One problem that most backlight modules usually have is that during the use of the backlight module, the light guide plate may be swollen and deformed due to high temperature, so that the light-coupled distance between the light-incident surface of the light guide plate and the light-emitting surface of the LED light is Changes occur, which can seriously affect the light entering efficiency of the light source.
  • the light guide plate When the coupling distance is too small, the light guide plate is also likely to collide with the LED lamp during transportation to cause damage.
  • the coupling distance becomes zero that is, when the light incident surface of the light guide plate is in direct contact with the LED lamp, the light guide plate may also cause the LED lamp to be squeezed, resulting in serious damage of the LED lamp.
  • the technical problem to be solved by the present invention is to provide a defect that the coupling distance between the LED lamp and the light guide plate in the prior art is difficult to ensure during use, and provide an LED lamp and a light guide plate during use.
  • the invention constructs a
  • the backlight module includes a back plate, a heat sink, an LED light bar, a light guide plate, and an optical film;
  • the heat sink includes a bottom plate mounted on the back plate, and a side plate perpendicular to the bottom plate;
  • An LED light bar is disposed on an inner side surface of the side plate, and the LED light bar includes a substrate, and a plurality of LED lights disposed on the substrate;
  • the light guide plate is mounted on a top of the bottom plate, and The light incident surface of the light guide plate is opposite to the light emitting surface of the LED lamp;
  • the optical film is mounted on the top of the light guide plate;
  • the backlight module further includes a bracket connected to the side plate; a side of the bracket adjacent to the light guide plate is provided with at least one protrusion for limiting the position of the light guide plate; in a direction perpendicular to the light incident surface of the light guide plate, The limiting portion is located between the LED lamp and the light guide plate.
  • the end of the limiting portion abuts against the light incident surface of the light guide plate.
  • the limiting portion is located between the two LED lamps in a direction parallel to the light incident surface of the light guide plate.
  • the bracket In the present invention, the bracket includes a bracket body and a connecting portion disposed on the bracket body; the bracket is connected to the side panel through the connecting portion.
  • the connecting portion is provided with a card slot; and the side plate is provided with a buckle for snap-fitting with the card slot.
  • the backlight module further includes a connecting member; the connecting member is connected to the side plate through the connecting portion.
  • the backlight module further includes a double-sided tape; one side of the double-sided tape is bonded to the connecting portion, and the other side is bonded to the side plate.
  • a thermal conductive paste is disposed between the substrate and the side plate.
  • the substrate is disposed on the side plate by a screw connection.
  • the invention also constructs a a liquid crystal display including a display panel and a backlight module;
  • the backlight module includes a back plate, a heat sink, an LED light bar, a light guide plate, and an optical film; the light guide plate, the optical film, and the The display panel is sequentially placed in parallel;
  • the heat sink includes a bottom plate mounted on the back plate, and a side plate perpendicular to the bottom plate;
  • the LED light bar is disposed on an inner side surface of the side plate, and the
  • the LED strip includes a substrate and a plurality of LED lamps disposed on the substrate;
  • the light guide plate is mounted on a top of the bottom plate, and a light incident surface of the light guide plate is opposite to a light emitting surface of the LED lamp
  • the backlight module further includes a bracket connected to the side panel; at least one side of the bracket adjacent to the light guide plate is provided with a protrusion for limiting the position of the light guide plate a position portion; the limiting portion is located between the
  • the end of the limiting portion abuts against the light incident surface of the light guide plate.
  • the limiting portion is located between the two LED lamps in a direction parallel to the light incident surface of the light guide plate.
  • the bracket includes a bracket body and a connecting portion disposed on the bracket body; the bracket is coupled to the side panel by the connecting portion.
  • the A card slot is disposed on the connecting portion; and the side plate is provided with a buckle for fastening and connecting with the card slot.
  • the backlight module further includes a connecting member; the connecting member is connected to the side plate through the connecting portion.
  • the backlight module further includes a connecting member; the connecting member is connected to the side plate through the connecting portion.
  • a thermal conductive paste is disposed between the substrate and the side plate.
  • the substrate is disposed on the side plate by screwing.
  • the backlight module and the liquid crystal display have the following beneficial effects: the backlight module adopts a structure of a bracket, which can ensure a certain coupling distance between the light guide plate and the LED lamp to improve the coupling efficiency, thereby improving the display quality; Can prevent it The change in the coupling distance causes the display quality to deteriorate and the LED lamp to be damaged.
  • FIG. 1 is an exploded perspective view of a backlight module according to a first preferred embodiment of the present invention
  • FIG. 2 is a schematic view showing a mounting position of a bracket and an LED light bar in the backlight module shown in FIG. 1;
  • FIG. 3 is a perspective structural view of a bracket in the backlight module shown in FIG. 1;
  • FIG. 4 is a schematic structural view of the backlight module of the backlight module shown in FIG. 1 when the limiting portion of the bracket is in contact with the light incident surface of the light guide plate;
  • FIG. 5 is a schematic structural view showing a connection portion of a bracket in the backlight module shown in FIG. 1 and a heat sink;
  • FIG. 6 is a schematic view showing a connection structure between a connecting portion of a bracket and a heat sink in a backlight module according to a second preferred embodiment of the present invention
  • FIG. 7 is a schematic view showing a connection structure between a connecting portion of a bracket and a heat dissipating member in a backlight module according to a third preferred embodiment of the present invention.
  • a first preferred embodiment of the present invention provides a backlight module including a backplane 1, a heat sink 2, and an LED.
  • the heat sink 2 is substantially an L-shaped structure including a bottom plate 21 and a side plate 22 perpendicular to the bottom plate 21. In this embodiment, the heat sink 2 is acted upon by an existing aluminum extrusion.
  • the backing plate 1 is substantially a plate-like structure located at the bottom of the bottom plate 21 and fixedly coupled to the bottom plate 21.
  • the back plate 1 is a metal plate on which a plurality of fixing holes 11 for fixing the heat sink 2 are disposed.
  • the light bar 3 is substantially a straight strip structure disposed on the inner side surface of the side plate 22, so that the heat generated by the LED light bar 3 can be conducted to the heat sink 2 for heat dissipation in time.
  • the LED light bar 3 includes a substrate 31 and an LED lamp 32, as shown in FIG. A plurality of LED lamps 32 are uniformly disposed on the substrate 31.
  • the substrate 31 is disposed on the side plate 22 by screwing.
  • a thermal paste 10 is disposed between the substrate 31 and the side plate 22.
  • Thermal paste 10 As a medium for transferring heat, it has excellent electrical insulation and thermal conductivity, as well as high and low temperature resistance.
  • the light guide plate 4 is mounted on the top of the bottom plate 21, and the light incident surface of the light guide plate 4 is opposed to the light emitting surface of the LED lamp 32.
  • the reflection sheet 6 is located between the light guide plate 4 and the bottom plate 21.
  • the optical film 7 is mounted on the top of the light guide plate 4.
  • the bracket 5 is substantially an elongated structure including a bracket body 51, a connecting portion 52, and a limiting portion 53, as shown in FIG.
  • the bracket main body 51, the connecting portion 52, and the limiting portion 53 may be integrally formed.
  • the bracket 5 is preferably metal sheet metal to ensure sufficient rigidity. It can be understood that the bracket 5 can also be made of a plastic material having a certain rigidity.
  • the bracket body 51 is located at the top of the side panel 22 and the LED light bar 3.
  • the connecting portion 52 is provided on the bracket main body 51. In this embodiment, the bracket body 51 is provided with two connecting portions 52. It can be understood that the number of the connecting portions 52 can also have other options.
  • the connecting portion 52 is disposed perpendicular to the bracket main body 51, and the connecting portion 52 is connected to the outer side of the side plate 22 in the heat sink 2.
  • the connecting portion 52 is provided with a card slot 54
  • the side plate 22 is provided with a buckle 21 at a position corresponding to the card slot 54, as shown in FIG.
  • the buckle 21 and the card slot 54 are fastened to each other, so that the bracket 5 is connected to the heat sink 2.
  • the limiting portion 53 is disposed on the side of the bracket body 51 adjacent to the light guide plate 4 in a convex shape for limiting the position of the light guide plate 4.
  • the limiting portion 53 is provided at least one. In order not to affect the normal operation of the LED lamp 32, as shown in FIG. 2, in this embodiment, the limiting portion 53 is disposed in the middle of the two LED lamps 32 in a direction parallel to the light incident surface of the light guide plate 4. .
  • Three brackets 53 are disposed on the bracket body 51, and each of the limiting portions 53 is disposed between the two LED lamps 32. It can be understood that the number of the limiting portions 53 can also have other options.
  • the stopper portion 53 is located between the LED lamp 32 and the light guide plate 4 in a direction perpendicular to the light incident surface of the light guide plate 4.
  • the end of the limiting portion 53 can abut against the light incident surface of the light guide plate 4, as shown in FIG.
  • the light guide plate 4 may undergo expansion deformation due to temperature changes or the like during use, so that the light guide plate 4 is directed to the LED.
  • the lamp 32 is close to one side. Since the bracket 5 has a certain rigidity, the limiting portion 53 is disposed between the LED lamp 32 and the light guide plate 4 to block the light guide plate 4 to the LED.
  • the lamp 32 is inflated on one side to keep the distance between the light guide plate 4 and the LED lamp 32 constant.
  • the light guide plate 4 is kept in contact with the limiting portion 53.
  • the coupling distance is consistent, that is, the coupling distance is The distance between the light emitting surface of the LED lamp 32 and the contact surface between the light guide plate 4 and the stopper portion 53.
  • the coupling distance between the LED lamp 32 and the light guide plate 4 is kept constant, and a high incident rate can be ensured.
  • the bracket 5 is placed between the LED lamp 32 and the light guide plate 4 to prevent the disappearance of the coupling distance and cause a decrease in the display quality of the backlight module.
  • a backlight module provided by the second preferred embodiment of the present invention is different from the backlight module of the first embodiment in that The connection between the connecting portion 52 and the side plate 22.
  • the backlight module further includes a connecting member 8, and the connecting member 8 can be configured by a screw member, a pin, or the like.
  • the connecting member 8 is connected to the side plate 22 through the connecting portion 52, so that the bracket 5 is attached to the heat sink 2. With the structure of the connecting member 8, the bracket 5 can be detachably attached to the heat sink 2.
  • a backlight module provided by the third preferred embodiment of the present invention is different from the backlight module of the first embodiment and the second embodiment in that The connection between the connecting portion 52 and the side plate 22.
  • the backlight module further includes a double-sided tape 9.
  • One side of the double-sided tape 9 is bonded to the connecting portion 52, and the other side is bonded to the side plate 22.
  • the double-sided tape 9 can be made of foam double-sided tape, mesh double-sided tape, etc., and has excellent characteristics such as strong adhesion and strong temperature resistance.
  • the bonding method of the double-sided tape 9 can make the connection between the bracket 5 and the heat sink 2 stable and reliable.
  • the present invention also provides a liquid crystal display including a display panel (not shown), and The backlight module of any of the above embodiments.
  • the light guide plate 4, the optical film 7, and the display panel are sequentially placed in parallel.
  • the backlight module adopts a structure of a bracket, which can ensure a certain coupling distance between the light guide plate and the LED lamp to improve the coupling efficiency, thereby improving the display quality; and further preventing the change of the coupling distance Causes deterioration of display quality and damage to LED lights.

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

Abstract

La présente invention se rapporte à un module de rétroéclairage et à un dispositif d'affichage à cristaux liquides. Le module de rétroéclairage comprend un panneau arrière (1), un élément de dissipation de chaleur (2), un ruban (3) de lumière à DEL, une plaque de guidage (4) de lumière, un film optique (7) et un cadre de support (5). L'élément de dissipation de chaleur (2) comprend un panneau de base (21) monté sur le panneau arrière (1) et un panneau latéral (22) perpendiculaire au panneau de base (21). Le cadre de support (5) est relié au panneau latéral (22). Le ruban (3) de lumière à DEL comprend un substrat (31) et une lumière à DEL (32). Une surface d'incidence de lumière de la plaque de guidage (4) de lumière est opposée à une surface d'émission de lumière de la lumière à DEL (32). Une partie butée saillante (53) utilisée pour limiter la position de la plaque de guidage (4) de lumière est au moins agencée sur un côté du cadre de support (5) à proximité de la plaque de guidage (4) de lumière, et, dans la direction perpendiculaire à la surface d'incidence de lumière de la plaque de guidage (4) de lumière, la partie butée (53) est agencée entre la lumière à DEL (32) et la plaque de guidage (4) de lumière. Le présent module de rétroéclairage emploie la structure du cadre de support (5) pour s'assurer que la plaque de guidage (4) de lumière et la lumière à DEL (3) sont espacées d'une certaine distance de couplage de lumière, ce qui permet d'augmenter l'efficacité de couplage de lumière, réalisant ainsi l'effet d'une qualité d'affichage améliorée, et permettant d'éviter un phénomène de qualité d'affichage réduite et de lumière à DEL endommagée causé par des changements de la distance de couplage de lumière.
PCT/CN2013/072639 2013-03-05 2013-03-14 Module de rétroéclairage et dispositif d'affichage à cristaux liquides WO2014134841A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201320100130.3 2013-03-05
CN2013201001303U CN203115716U (zh) 2013-03-05 2013-03-05 背光模组及液晶显示器

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WO2014134841A1 true WO2014134841A1 (fr) 2014-09-12

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TWI643333B (zh) * 2017-09-05 2018-12-01 瑞軒科技股份有限公司 顯示裝置及其組裝與拆卸方法
CN109696774A (zh) * 2018-12-10 2019-04-30 杭州炽云科技有限公司 一种高亮度lcd背光模组的结构及其实验方法
CN112255836A (zh) * 2020-11-03 2021-01-22 重庆翰博光电有限公司 一种适用于超窄边框解边侧漏光背光模组
US10983378B2 (en) 2017-09-19 2021-04-20 Suzhou Raken Technology Co., Ltd. Display device and assembling and disassembling method therefor
CN114442376A (zh) * 2022-02-22 2022-05-06 四川长虹电器股份有限公司 一种侧入式超窄第四边液晶模组

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TWI516844B (zh) * 2014-05-16 2016-01-11 友達光電股份有限公司 背光模組與其顯示裝置
CN105987320A (zh) * 2015-02-05 2016-10-05 苏州璨宇光学有限公司 背光模块
CN105652359A (zh) * 2015-11-06 2016-06-08 乐视致新电子科技（天津）有限公司 导光模组及包括导光模组的显示装置
CN211207017U (zh) * 2020-02-13 2020-08-07 合肥京东方视讯科技有限公司 显示模组和具有其的电子设备
CN113759603B (zh) * 2021-09-08 2023-05-12 京东方科技集团股份有限公司 背光模组及显示装置

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CN202253402U (zh) * 2011-09-15 2012-05-30 深圳市华星光电技术有限公司 复合型背光板、背光模组及液晶显示器
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CN102444841A (zh) * 2010-10-01 2012-05-09 三星电子株式会社 背光组件及具有该背光组件的显示装置
CN202176976U (zh) * 2011-07-09 2012-03-28 深圳市华星光电技术有限公司 一种背光模块以及背光装置
CN202209594U (zh) * 2011-09-08 2012-05-02 深圳市华星光电技术有限公司 背光模组及使用此背光模组的液晶显示装置
CN202253402U (zh) * 2011-09-15 2012-05-30 深圳市华星光电技术有限公司 复合型背光板、背光模组及液晶显示器
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI643333B (zh) * 2017-09-05 2018-12-01 瑞軒科技股份有限公司 顯示裝置及其組裝與拆卸方法
US10983378B2 (en) 2017-09-19 2021-04-20 Suzhou Raken Technology Co., Ltd. Display device and assembling and disassembling method therefor
CN109696774A (zh) * 2018-12-10 2019-04-30 杭州炽云科技有限公司 一种高亮度lcd背光模组的结构及其实验方法
CN109696774B (zh) * 2018-12-10 2023-07-14 杭州炽云科技有限公司 一种高亮度lcd背光模组的结构及其实验方法
CN112255836A (zh) * 2020-11-03 2021-01-22 重庆翰博光电有限公司 一种适用于超窄边框解边侧漏光背光模组
CN112255836B (zh) * 2020-11-03 2023-01-31 重庆翰博光电有限公司 一种适用于超窄边框解边侧漏光背光模组
CN114442376A (zh) * 2022-02-22 2022-05-06 四川长虹电器股份有限公司 一种侧入式超窄第四边液晶模组

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