WO2013143180A1 - 背光模组 - Google Patents

背光模组 Download PDF

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Publication number
WO2013143180A1
WO2013143180A1 PCT/CN2012/073963 CN2012073963W WO2013143180A1 WO 2013143180 A1 WO2013143180 A1 WO 2013143180A1 CN 2012073963 W CN2012073963 W CN 2012073963W WO 2013143180 A1 WO2013143180 A1 WO 2013143180A1
Authority
WO
WIPO (PCT)
Prior art keywords
light guide
guide plate
plate
backlight module
elastic body
Prior art date
Application number
PCT/CN2012/073963
Other languages
English (en)
French (fr)
Inventor
陈仕祥
阙成文
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
Priority to US13/512,874 priority Critical patent/US8752992B2/en
Publication of WO2013143180A1 publication Critical patent/WO2013143180A1/zh

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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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • 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
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • 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
    • G02F1/133322—Mechanical guidance or alignment of LCD panel support components
    • 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

Definitions

  • the present invention relates to a backlight module, and more particularly to a backlight module in which a light guide plate is fixed by an elastic body. Background technique
  • Liquid crystal display has many advantages such as thin body, power saving, and no radiation, and has been widely used.
  • Most of the liquid crystal display devices on the market are backlight type liquid crystal displays, which include a liquid crystal display panel and a backlight module.
  • the working principle of the liquid crystal display panel is to place liquid crystal molecules in two parallel glass. There are many vertical and horizontal small wires between the two glass plates.
  • the liquid crystal molecules are controlled to change direction by energization or not, and the light of the backlight module is reflected. Produce a picture. Since the liquid crystal display panel itself does not emit light, it is necessary to display the image normally by the light source provided by the backlight module. Therefore, the backlight module becomes one of the key components of the liquid crystal display device.
  • the backlight module is divided into a side-lit backlight module and a direct-lit backlight module according to different incident positions of the backlight.
  • a backlight such as a CCFL (Cold Cathode Fluorescent Lamp) or an LED (Light Emitting Diode) is disposed behind the liquid crystal display panel, and a surface light source is directly formed and supplied to the liquid crystal display panel.
  • the side-lit backlight module has a backlight LED light bar disposed on the edge of the back panel behind the liquid crystal display panel, and the light emitted by the LED light bar enters the light guide plate from the light incident surface of the light guide plate, and is reflected. And diffusing and exiting from the light-emitting surface of the light guide plate to form a surface light source for being supplied to the liquid crystal display panel.
  • the positioning and fixing of the light guide plate is particularly important.
  • the existing light guide plate is positioned and fixed by: providing a stud on the back plate or bending the bayonet structure and then making a corresponding on the light guide plate.
  • the slotted or raised structure is used for snap positioning.
  • LCDs have gradually evolved toward thinner and larger sizes, resulting in thinner and lighter light guide plates, which have made the heat absorbing and expanding characteristics of the light guide plates stand out. This requires the light guide plate positioning portion and the back plate to be fixed when the light guide plate is fixed.
  • the engaging structure reserves a gap required for the light guide plate to expand and contract during the fitting, and further provides a certain amount of movement of the light guide plate inside the backlight module, and the movement of the light guide plate easily causes the light guide plate to be worn, etc.
  • the processing cost increases and the mechanical strength of the light guide plate itself is weakened, and the light guide plate is easily broken when subjected to an external force;
  • the light guide plate has a grooved or convex structure around the light guide plate, so that the partial optical path of the side surface of the light guide plate is changed, and the brightness of the edge of the backlight module is uneven. The problem is that the yield of the narrow-frame backlight module is greatly reduced. Summary of the invention
  • An object of the present invention is to provide a backlight module that fixes a light guide plate in a back plate through an elastic body disposed between a side plate of the back plate and the light guide plate, thereby avoiding the prior art to fix the light guide plate.
  • the special processing of the light plate the production process is reduced, the production cost is reduced, and the illumination and the brightness of the entire backlight module are ensured, and the buffer space is given to the light guide plate, thereby avoiding the light guide plate being squeezed.
  • the deformation improves the quality of the entire backlight module.
  • the present invention provides a backlight module, including: a backboard, a light guide plate disposed in the backboard, and a plurality of elastic bodies mounted on the backboard, the backplane including a bottom plate and a vertical connection thereto a plurality of side plates around the bottom plate, the light guide plate includes a bottom surface facing the bottom plate, a top surface away from the bottom plate, and a plurality of sides connected between the bottom surface and the top surface, wherein the plurality of elastic bodies are respectively mounted on the back plate And a plurality of elastic bodies abut on the three sides of the light guide plate, and the contact surface of the elastic body contacting the side surface of the light guide plate is a curved surface or a spherical surface.
  • the plurality of side plates of the light guide plate respectively face a plurality of side plates of the back plate, and the three side plates of the back plate are respectively provided with a plurality of mounting slots, and the elastic body is installed in the mounting slots and abuts On the three sides of the light guide plate.
  • the elastomer is made of silicone rubber.
  • the mounting groove is formed in a U-shaped shape, and is formed by extending from the inner side to the outer side of the side plate.
  • the elastic body is received in the mounting groove, and the contact surface contacting the side surface of the light guide plate protrudes from the mounting groove.
  • the elastomer is a sphere or an ellipsoid.
  • the mounting slot is a through hole, and one end of the elastic body is inserted into the through hole and is locked on the through hole, and the other end abuts against the side surface of the light guide plate.
  • One end of the elastic body is provided with an engaging groove, the width of the engaging groove corresponds to the thickness of the side plate, the edge of the mounting groove is engaged in the engaging groove, and the other end of the elastic body is provided with the side surface of the light guide plate.
  • Contact surface which is curved or spherical.
  • the elastomer is in the form of a column, a sphere or an elliptical sphere.
  • the light guide plate has a rectangular shape and has four sides; the back plate has a rectangular shape and has four side plates.
  • the backlight module further includes a backlight disposed on the side plate of the back plate, a reflective sheet disposed on the bottom surface of the light guide plate, and an optical film disposed on the top surface of the light guide plate.
  • the backlight module of the present invention fixes the light guide plate in the back plate through an elastic body disposed between the side plate of the back plate and the light guide plate, and does not need to be grooved, raised, etc. around the light guide plate. Processing, ensuring the mechanical strength of the light guide plate, while providing a certain buffer space, avoiding the present In the prior art, the light guide plate is deformed by heat expansion, which greatly reduces the free movable space of the light guide plate and absorbs the direct impact of the external force on the light guide plate to protect the light guide plate, and at the same time, avoids the light path caused by the deformation of the light guide plate structure. The change of the situation, in turn, ensures the illumination intensity and uniformity of illumination, thereby improving the quality of the entire backlight module and the production cost is low.
  • FIG. 1 is a schematic structural view of an embodiment of a backlight module of the present invention
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
  • FIG. 3 is a cross-sectional view showing another embodiment of a backlight module of the present invention.
  • Figure 4 is a perspective view of the elastomer of Figure 3. detailed description
  • the backlight module includes: a back plate 2 , a light guide plate 4 disposed in the back plate 2 , and a back plate 2 and a light guide plate 4 .
  • the backboard 2 includes a bottom plate 22 and a plurality of side plates 24 vertically connected to the bottom plate 22.
  • the light guide plate 4 includes a bottom surface 42 facing the bottom plate, a top surface 44 away from the bottom plate, and a plurality of side surfaces 46 connected between the bottom surface 42 and the top surface 44.
  • the plurality of side surfaces 46 correspond to the plurality of side plates 2 Side panel 24.
  • the three side plates 24 of the backboard 2 are respectively provided with a plurality of mounting slots 242.
  • the elastic body 6 is mounted in the mounting slot 242 and abuts against the corresponding side surface 46 of the light guide plate 4, so that the light guide plate can be fixed at
  • the backboard 2 has a rectangular shape and has four side panels 24; the light guide panel 4 has a rectangular shape and has four side faces 46.
  • the elastic body 6 is made of an elastic material such as silicone rubber and has a certain elasticity and strength.
  • the elastic body 6 is mounted in the mounting groove 242 of the side plate 24 of the backboard 2 and abuts against the light guide plate.
  • the corresponding side surface 46 of the 4 is not only fixed to the light guide plate 4, but also provides a certain buffer space for the light guide plate 4, avoiding the deformation of the light guide plate 4 due to the heat absorption expansion of the light guide plate 4, and greatly reducing the free movement space and absorption of the light guide plate 4. Direct impact of the external force on the light guide plate 4 to protect the light guide plate 4.
  • the contact surface of the elastic body 6 in contact with the light guide plate 4 is a curved surface or a spherical surface, so that the installation is smooth, and at the same time, the elastic fixing and the elastic buffering function are provided, and the fixing of the light guide plate 4 in the prior art is avoided.
  • the special treatment of the structure of the light guide plate 4 reduces the production cost and the process of the cylinder, and at the same time, avoids the change of the light path caused by the structural change of the light guide plate 4, and ensures the illumination of the entire backlight module. Uniformity and brightness.
  • the mounting groove 242 is formed in a U shape, which is formed by the side plate 24 extending from the inside to the outside.
  • the elastic body 6 is a sphere or an ellipsoid, and the elastic body 6 is The two sides of the recess 242 are respectively disposed on the bottom of the recess 242 and the corresponding side surface 46 of the light guide plate 4, and the contact surface contacting the side surface 46 of the light guide plate protrudes from the mounting groove 242, and then passes through the elastic body. 6 Fix the light guide plate 4 in the back plate 4.
  • the backlight module further includes a backlight 7 disposed on the side plate 24 of the back plate 2, a reflective sheet 8 disposed on the bottom surface 42 of the light guide plate 4, and an optical film 9 disposed on the top surface 44 of the light guide plate 4.
  • the backlight module is a one-side backlight module, and the three side plates 24 of the back plate 2 are provided with mounting slots 242 for mounting the elastic body 6.
  • the backlight 7 is on the side of the light guide plate 4.
  • the backlight 7 includes a PCB and a plurality of LEDs disposed on the PCB, and further includes a heat dissipation bracket disposed between the PCB and the side plate 24 to generate the LED. The heat is transferred to the backing plate 2.
  • FIG. 3 is a schematic structural diagram of another embodiment of the present invention.
  • the backlight module includes: a backboard 2, a light guide plate 4 disposed in the backboard 2, and On the backboard 2, a plurality of elastic bodies 6, on the back.
  • the backboard 2 includes a bottom plate 22, and a plurality of side plates 24 vertically connected to the bottom plate 22.
  • the light guide plate 4 includes a bottom surface 42 facing the bottom plate, a top surface 44 away from the bottom plate, and a plurality of side surfaces 46 connected between the bottom surface 42 and the top surface 44.
  • the three side panels 24 of the backplane 2 are respectively provided with a plurality of mounting slots 242, wherein the mounting slots 242 are through holes, and the elastic body 6 is inserted into the through holes at one end and is locked on the through holes.
  • the other end 4 ⁇ rests on the side 46 of the light guide plate 4.
  • the elastic body 6 is made of an elastic material such as silicone rubber, and has a columnar shape, a spherical shape, or an elliptical shape.
  • the elastic body 6 is a round cylindrical body.
  • the elastic body 6 has an engaging groove 62 at one end thereof, and the width of the engaging groove 62 corresponds to the side plate 24, and the edge of the mounting groove 242 is engaged with the engaging groove 62.
  • the other end of the elastic body 6 is provided with a contact surface which is in contact with the side surface 46 of the light guide plate 4, and the contact surface is a curved surface or a spherical surface, thereby achieving the same technical effects as those of the above embodiment.
  • the backlight module of the present invention fixes the light guide plate in the back plate through an elastic body disposed between the side plate of the back plate and the light guide plate, and does not need to be grooved, raised, etc. around the light guide plate.
  • the mechanical strength of the light guide plate is ensured, and a certain buffer space is provided at the same time, so as to avoid the extrusion deformation of the light guide plate due to thermal expansion in the prior art, and greatly reduce the free movement space of the light guide plate and the direct impact of the external force on the light guide plate.
  • the light path change caused by the deformation of the light guide plate structure is avoided, thereby ensuring the illumination intensity and the illumination uniformity, thereby improving the quality of the entire backlight module and the production cost is low.

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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

一种背光模组，包括：背板（2）、设于背板（2）内的导光板（4）及安装于背板（2）上的数个弹性体（6），所述背板（2）包括底板（22）及垂直连接于该底板（22）周围的数个侧板（24），所述导光板（4）包括朝向底板（22）的底面（42）、远离底板（22）的顶面（44）、及连接在底面（42）与顶面（44）之间的数个侧面（46），该数个弹性体（6）分别安装于背板（2）的三个侧板（24）上，且数个弹性体（6）抵靠于导光板（4）的三个侧面（46）上，所述弹性体（6）与导光板侧面（46）接触的接触面为弧面或球面。该背光模组通过设于背板侧板（24）与导光板（4）之间的弹性体（6）将导光板（4）固定于背板（2）内，不需要对导光板（4）周边进行开槽、凸起等处理，保证了导光板（4）的机械强度，同时提供一定的缓冲空间，避免导光板（4）因为受热膨胀而造成挤压变形，保证了光照强度及光照均匀度，且成本低。

Description

背光模组
技术领域
本发明涉及一种背光模组， 尤其涉及一种由弹性体固定导光板的背光 模组。 背景技术
液晶显示装置（LCD, Liquid Crystal Display )具有机身薄、 省电、 无 辐射等众多优点， 得到了广泛的应用。 现有市场上的液晶显示装置大部分 为背光型液晶显示器， 其包括液晶显示面板及背光模组 （ backlight module ) 。 液晶显示面板的工作原理是在两片平行的玻璃当中放置液晶分 子， 两片玻璃中间有许多垂直和水平的细小电线， 通过通电与否来控制液 晶分子改变方向， 将背光模组的光线折射出来产生画面。 由于液晶显示面 板本身不发光， 需要借由背光模组提供的光源来正常显示影像， 因此， 背 光模组成为液晶显示装置的关键零组件之一。 背光模组依照背光源入射位 置的不同分成侧入式背光模组与直下式背光模组两种。 直下式背光模组是 将背光源例如 CCFL(Cold Cathode Fluorescent Lamp , 阴极萤光灯管）或 LED(Light Emitting Diode发光二极管)设置在液晶显示面板后方， 直接形 成面光源提供给液晶显示面板。 而侧入式背光模组是将背光源 LED 灯条 ( lightbar )设于液晶显示面板侧后方的背板边缘， LED灯条发出的光线从 导光板一侧的入光面进入导光板， 经反射和扩散后从导光板出光面出射， 以形成面光源提供给液晶显示面板。
背光模组组装制程中， 导光板的定位及固定尤为重要， 现有的导光板 定位及固定方式是： 在背板上设置铆柱或者是折弯出卡销结构然后在导光 板上制作出对应的开槽或者是凸起结构来进行卡合定位。 然而近年来 LCD 渐渐朝薄型化及大尺寸化演进， 导致导光板越来越薄， 使得导光板的吸热 膨胀特性突显出来， 这就使得在固定导光板时需要在导光板定位部与背板 上的卡合结构在配合时预留出供导光板胀缩所需的间隙， 进而给导光板在 背光模组的内部预设有一定的移动量， 而导光板的移动容易造成导光板磨 伤等问题； 同时由于导光板上存在开槽或是凸起结构， 导致其加工成本上 升且减弱了导光板本身的机械强度， 在受到外力沖击时容易出现导光板破 裂等情况发生； 再者， 由于导光板四周具有开槽或者凸起结构， 使得导光 板侧面的局部光学路径被改变， 容易出现背光模组边缘亮度不均匀等光学 问题， 使得窄边框背光模组的良率大幅度降低。 发明内容
本发明的目的在于提供一种背光模组， 其通过设于背板侧板与导光板 之间的弹性体将导光板固定于背板内， 避免了现有技术中为固定导光板而 对导光板进行特殊加工， 筒化了生产制程、 降低了生产成本， 同时保证了 整个背光模组的光照均勾性及辉度， 且给导光板一定的緩沖空间， 避免了 导光板由于挤压而导致的变形， 提高了整个背光模组的品质。
为实现上述目的， 本发明提供一种背光模组， 包括： 背板、 设于背板 内的导光板及安装于背板上的数个弹性体， 所述背板包括底板及垂直连接 于该底板周围的数个侧板， 所述导光板包括朝向底板的底面、 远离底板的 顶面、 及连接在底面与顶面之间的数个侧面， 该数个弹性体分别安装于背 板的三个侧板上， 且数个弹性体抵靠于导光板的三个侧面上， 所述弹性体 与导光板侧面接触的接触面为弧面或球面。
所述导光板的数个侧面分别面对背板的数个侧板， 所述背板的三个侧 板分别设有数个安装槽， 所述弹性体安装于该些安装槽内， 并抵靠于所述 导光板的三个侧面。
所述弹性体由硅橡胶制成。
所述安装槽呈侧放的 U形， 其由侧板从内侧向外侧延伸形成， 所述弹 性体容置于安装槽内， 且其与导光板侧面接触的接触面伸出该安装槽。
所述弹性体为球体或橢圓球体。
所述安装槽为通孔， 所述弹性体一端插入该通孔并卡设于通孔上， 另 一端抵靠于导光板的侧面。
所述弹性体一端设有卡合槽， 该卡合槽的宽度对应于侧板厚度， 安装 槽的边缘卡合于该卡合槽内， 所述弹性体另一端设有与导光板侧面接触的 接触面， 其为弧面或球面。
所述弹性体呈柱状、 球状或橢圓球状。
所述导光板呈矩形， 其具有四个侧面； 所述背板呈矩形， 其具有四个 侧板。
所述背光模组还包括设于背板侧板上的背光源、 设于导光板底面的反 射片、 及设于导光板顶面的光学膜片。
本发明的有益效果： 本发明背光模组， 其通过设于背板侧板与导光板 之间的弹性体将导光板固定于背板内， 不需要对导光板周边进行开槽、 凸 起等处理， 保证了导光板的机械强度， 同时提供一定的緩沖空间， 避免现 有技术中导光板因为受热膨胀而造成挤压变形， 大大缩小导光板自由活动 空间及吸收外力对导光板的直接沖击以保护导光板， 同时， 避免了由于导 光板结构变形而导致的光线路径改变的情况， 进而保证了光照强度及光照 均匀度， 进而提高了整个背光模组的品质， 且生产成本低。
为了能更进一步了解本发明的特征以及技术内容， 请参阅以下有关本 发明的详细说明与附图， 然而附图仅提供参考与说明用， 并非用来对本发 明加以限制。 附图说明
下面结合附图， 通过对本发明的具体实施方式详细描述， 将使本发明 的技术方案及其它有益效果显而易见。
附图中，
图 1为本发明背光模组一实施例的结构示意图；
图 2为图 1的 A-A向剖面示意图；
图 3为本发明背光模组另一实施例的剖面示意图；
图 4为图 3中弹性体的立体示意图。 具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果， 以下结合本发明 的优选实施例及其附图进行详细描述。
请参阅图 1 及图 2, 作为本发明背光模组的一实施例， 该背光模组包 括： 背板 2、 设于背板 2内的导光板 4及设于背板 2与导光板 4之间的数 个弹性体 6。 所述背板 2包括底板 22及垂直连接于该底板 22周围的数个 侧板 24。 所述导光板 4包括朝向底板的底面 42、 远离底板的顶面 44、 及 连接在底面 42与顶面 44之间的数个侧面 46 , 该数个侧面 46对应面对背 板 2 的数个侧板 24。 其中， 背板 2 的三个侧板 24分别设有数个安装槽 242, 所述弹性体 6安装于安装槽 242 内， 并抵靠于导光板 4的对应侧面 46, 从而可将导光板固定在背板 2 内， 在本实施例中， 所述背板 2 呈矩 形， 其具有四个侧板 24; 所述导光板 4呈矩形， 其具有四个侧面 46。
所述弹性体 6 由硅橡胶等弹性材料制成， 具有一定的弹性及强度， 通 过该弹性体 6安装于所述背板 2的侧板 24上的安装槽 242 内， 并抵靠于 导光板 4的对应侧面 46, 这样不仅固定了导光板 4, 还可以为该导光板 4 提供一定緩沖空间， 避免因导光板 4 的吸热膨胀导致挤压变形， 还大大缩 小导光板 4 自由活动空间及吸收外力对导光板 4的直接沖击以保护导光板 4。 且， 弹性体 6 与导光板 4接触的接触面为弧面或球面， 使得安装较为 顺畅， 同时提供更好的弹性固定及弹性緩沖作用， 且避免了现有技术中由 于导光板 4的固定， 而对导光板 4的结构进行特殊处理的状况， 降低了生 产成本、 筒化了制程， 同时， 避免了由于导光板 4结构改变而导致的光线 路径的改变， 保证了整个背光模组的光照的均匀性及辉度。
请参阅图 2, 在本实施例中， 所述安装槽 242呈侧放的 U形， 其由侧 板 24从内侧向外侧延伸形成， 所述弹性体 6 为球体或橢圓球体， 该弹性 体 6容置于安装槽 242内， 其相对两端分别抵靠凹槽 242底部与导光板 4 的对应侧面 46, 且其与导光板侧面 46接触的接触面伸出该安装槽 242, 进而通过弹性体 6将导光板 4固定在背板 4内。
所述背光模组还包括设于背板 2侧板 24的背光源 7、 设于导光板 4底 面 42 的反射片 8、 及设于导光板 4顶面 44 的光学膜片 9。 在本实施例 中， 该背光模组为一侧入式背光模组， 背板 2 的三个侧板 24设有安装槽 242以安装弹性体 6, 所述背光源 7于导光板 4一侧设于所述背板 2的另 一侧板 24上， 该背光源 7包括 PCB及设于 PCB上的数个 LED, 还包括 散热支架， 设于 PCB与侧板 24之间， 可将 LED产生的热量传递至背板 2。
请参阅图 3 至 4 , 为本发明另一实施例的结构示意图， 在本实施例 中， 所述背光模组包括： 背板 2，、 设于背板 2，内的导光板 4、 及设于背板 2，上的数个弹性体 6，。
所述背板 2，包括底板 22，及垂直连接于该底板 22，周围的数个侧板 24，。 所述导光板 4 包括朝向底板的底面 42、 远离底板的顶面 44、 及连接 在底面 42与顶面 44之间的数个侧面 46。
所述背板 2，的三个侧板 24，分别设有数个安装槽 242，， 所述安装槽 242，为通孔， 所述弹性体 6，一端插入该通孔并卡设于通孔上， 另一端 4氐靠 于导光板 4的侧面 46。
所述弹性体 6， 为由硅橡胶等弹性材料制成， 其呈柱状、 球状或橢圓 球状， 在本实施例中， 该弹性体 6，为圓头柱体。 所述弹性体 6，一端设有卡 合槽 62，， 该卡合槽 62，的宽度对应于侧板 24，厚度， 安装槽 242，的边缘卡 合于该卡合槽 62，内， 所述弹性体 6，另一端设有与导光板 4侧面 46接触的 接触面， 该接触面为弧面或球面， 进而实现与上述实施例相同的技术效 果。
综上所述， 本发明背光模组， 其通过设于背板侧板与导光板之间的弹 性体将导光板固定于背板内， 不需要对导光板周边进行开槽、 凸起等处 理， 保证了导光板的机械强度， 同时提供一定的緩沖空间， 避免现有技术 中导光板因为受热膨胀而造成挤压变形， 大大缩小导光板自由活动空间及 吸收外力对导光板的直接沖击以保护导光板， 同时， 避免了由于导光板结 构变形而导致的光线路径改变的情况， 进而保证了光照强度及光照均匀 度， 进而提高了整个背光模组的品质， 且生产成本低。
以上所述， 对于本领域的普通技术人员来说， 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形， 而所有这些改变和变形 都应属于本发明权利要求的保护范围。

Claims

权 利 要 求
1、 一种背光模组， 包括： 背板、 设于背板内的导光板及安装于背板 上的数个弹性体， 所述背板包括底板及垂直连接于该底板周围的数个侧 板， 所述导光板包括朝向底板的底面、 远离底板的顶面、 及连接在底面与 顶面之间的数个侧面， 该数个弹性体分别安装于背板的三个侧板上， 且数 个弹性体抵靠于导光板的三个侧面上， 所述弹性体与导光板侧面接触的接 触面为孤面或球面。
2、 如权利要求 1 所述的背光模组， 其中， 所述导光板的数个侧面分 别面对背板的数个侧板， 所述背板的三个侧板分别设有数个安装槽， 所述 弹性体安装于该些安装槽内， 并抵靠于所述导光板的三个侧面。
3、 如权利要求 1 所述的背光模组， 其中， 所述弹性体由硅橡胶制 成。
4、 如权利要求 2 所述的背光模组， 其中， 所述安装槽呈侧放的 U 形， 其由侧板从内侧向外侧延伸形成， 所述弹性体容置于安装槽内， 且其 与导光板侧面接触的接触面伸出该安装槽。
5、 如权利要求 4 所述的背光模组， 其中， 所述弹性体为球体或橢圓 球体。
6、 如权利要求 2 所述的背光模组， 其中， 所述安装槽为通孔， 所述 弹性体一端插入该通孔并卡设于通孔上， 另一端抵靠于导光板的侧面。
7、 如权利要求 6 所述的背光模组， 其中， 所述弹性体一端设有卡合 槽， 该卡合槽的宽度对应于侧板厚度， 安装槽的边缘卡合于该卡合槽内， 所述弹性体另一端设有与导光板侧面接触的接触面， 其为弧面或球面。
8、 如权利要求 7 所述的背光模组， 其中， 所述弹性体呈柱状、 球状 或橢圓球 ^犬。
9、 如权利要求 1 所述的背光模组， 其中， 所述导光板呈矩形， 其具 有四个侧面； 所述背板呈矩形， 其具有四个侧板。
10、 如权利要求 1 所述的背光模组， 其中， 所述背光模组还包括设于 背板侧板上的背光源、 设于导光板底面的反射片、 及设于导光板顶面的光 学膜片。
11、 一种背光模组， 包括： 背板、 设于背板内的导光板及安装于背板 上的数个弹性体， 所述背板包括底板及垂直连接于该底板周围的数个侧 板， 所述导光板包括朝向底板的底面、 远离底板的顶面、 及连接在底面与 顶面之间的数个侧面， 该数个弹性体分别安装于背板的三个侧板上， 且数 个弹性体抵靠于导光板的三个侧面上， 所述弹性体与导光板侧面接触的接 触面为孤面或球面；
所述导光板的数个侧面分别面对背板的数个侧板， 所述背板的三个侧 板分别设有数个安装槽， 所述弹性体安装于该些安装槽内， 并抵靠于所述 导光板的三个侧面；
所述弹性体由硅橡胶制成；
所述安装槽呈侧放的 U形， 其由侧板从内侧向外侧延伸形成， 所述弹 性体容置于安装槽内， 且其与导光板侧面接触的接触面伸出该安装槽； 所述弹性体为球体或橢圓球体；
所述背光模组还包括设于背板侧板上的背光源、 设于导光板底面的反 射片、 及设于导光板顶面的光学膜片。
12、 一种背光模组， 包括： 背板、 设于背板内的导光板及安装于背板 上的数个弹性体， 所述背板包括底板及垂直连接于该底板周围的数个侧 板， 所述导光板包括朝向底板的底面、 远离底板的顶面、 及连接在底面与 顶面之间的数个侧面， 该数个弹性体分别安装于背板的三个侧板上， 且数 个弹性体抵靠于导光板的三个侧面上， 所述弹性体与导光板侧面接触的接 触面为孤面或球面；
所述导光板的数个侧面分别面对背板的数个侧板， 所述背板的三个侧 板分别设有数个安装槽， 所述弹性体安装于该些安装槽内， 并抵靠于所述 导光板的三个侧面；
所述弹性体由硅橡胶制成；
所述安装槽为通孔， 所述弹性体一端插入该通孔并卡设于通孔上， 另 一端抵靠于导光板的侧面；
所述弹性体一端设有卡合槽， 该卡合槽的宽度对应于侧板厚度， 安装 槽的边缘卡合于该卡合槽内， 所述弹性体另一端设有与导光板侧面接触的 接触面， 其为弧面或球面；
所述弹性体呈柱状、 球状或橢圓球状；
所述背光模组还包括设于背板侧板上的背光源、 设于导光板底面的反 射片、 及设于导光板顶面的光学膜片。
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CN201359237Y (zh) * 2009-03-06 2009-12-09 北京京东方光电科技有限公司 背光模组

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US10962706B2 (en) 2017-08-31 2021-03-30 Boe Technology Group Co., Ltd. Backlight module and display device
US10712496B2 (en) 2017-09-30 2020-07-14 Boe Technology Group Co., Ltd. Positioning structure, backlight source, display module and display device

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