WO2013120298A1 - 背光模组 - Google Patents

背光模组 Download PDF

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Publication number
WO2013120298A1
WO2013120298A1 PCT/CN2012/072506 CN2012072506W WO2013120298A1 WO 2013120298 A1 WO2013120298 A1 WO 2013120298A1 CN 2012072506 W CN2012072506 W CN 2012072506W WO 2013120298 A1 WO2013120298 A1 WO 2013120298A1
Authority
WO
WIPO (PCT)
Prior art keywords
light bar
heat
backlight module
bracket
temperature
Prior art date
Application number
PCT/CN2012/072506
Other languages
English (en)
French (fr)
Inventor
俞刚
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 US13/508,703 priority Critical patent/US8727562B2/en
Priority to DE112012005877.1T priority patent/DE112012005877B4/de
Publication of WO2013120298A1 publication Critical patent/WO2013120298A1/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
    • G02F1/1335—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
    • G02B6/0086—Positioning aspects
    • G02B6/009—Positioning aspects of the light source 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
    • G02F1/1335—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 the field of liquid crystal display, and more particularly to a backlight module having good thermal conductivity. 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 panel and a backlight module.
  • the working principle of the liquid crystal 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 refracted. Picture. Since the liquid crystal 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-entry backlight module and a direct-lit backlight module according to different incident positions of the light source.
  • a light source such as a CCFL (Cold Cathode Fluorescent Lamp) or an LED (Light Emitting Diode) is disposed behind the liquid crystal panel, and a surface light source is directly formed and supplied to the liquid crystal panel.
  • CCFL Cold Cathode Fluorescent Lamp
  • LED Light Emitting Diode
  • the side-lit backlight module is provided with an LED light bar disposed on the edge of the back panel behind the liquid crystal panel, and the light emitted by the LED strip enters the light guide plate from the light incident surface of the light guide plate, and is reflected and After being diffused, it is emitted from the light-emitting surface of the light guide plate to form a surface light source to be supplied to the liquid crystal panel.
  • the light bar is usually fixed on the bracket, and the bracket is fixed on the back plate, and the fixing method is generally screwed with a screw or a heat dissipating tape, and the former is easy to be in the light bar and the bracket.
  • the air heat resistance is formed to reduce the heat dissipation effect.
  • the latter has a low thermal conductivity, which seriously affects the heat dissipation effect.
  • the temperature of the entire light bar is high in the middle of the work, and the temperature on both sides is low, and it is often necessary to make special for the bracket.
  • the processing is to ensure the temperature balance of the whole bracket, avoiding the local over-high temperature, which causes the display of the screen to be abnormal, but the consequence of this is that the processing cost of the bracket increases.
  • Cia 201120142696.3 discloses an LED backlight and a liquid crystal panel (as shown in FIG. 1 ), the LED backlight includes a back plate 1 , a heat conducting block 2 disposed on the back plate 1 , and a heat conducting block disposed on the heat conducting block 2 LED light bar 4, the LED backlight further includes a heat pipe 3, the hot end of the heat pipe 3 is in contact with the heat conducting block 2, and the cold end of the heat pipe 3 is disposed away from The position of the LED strip 4 is in contact with the back panel 1. Therefore, the temperature of the entire backboard is hooked, which prolongs the service life of the LED strip.
  • this technical solution has greatly increased the cost of the LED backlight module, and the structure is large, which is inconvenient to assemble, resulting in high assembly failure rate. Summary of the invention
  • the present invention provides a backlight module, including: a back plate, a light bar mounted on the back plate, and a heat-sensitive heat conductive material disposed between the back plate and the light bar.
  • the heat-sensitive and heat-conductive material is a heat-sensitive material with a negative temperature coefficient, and its thermal conductivity decreases exponentially with an increase in temperature.
  • the backplane includes a bottom plate and a side plate connected to the bottom plate.
  • the side plate forms a receiving space with the bottom plate, and the light bar and the heat-sensitive and heat-conductive material are received in the receiving space.
  • the light bar is mounted on a side plate of the backboard, and the heat conductive material is disposed between the light bar and the side plate.
  • the backplane further includes a bracket disposed in the accommodating space, the light bar is mounted on the bracket, the bracket is mounted on the side panel of the backboard, and the heat conductive material is disposed on Between the light bar and the bracket.
  • the invention further includes a reflective sheet disposed in the accommodating space, a light guide plate disposed on the reflective sheet, and an optical component disposed on the light guide plate, wherein the reflective plate is disposed on the bottom plate of the back plate.
  • the light bar is a linear LED light bar.
  • the backlight module provided by the present invention is provided with a heat-sensitive and heat-conductive material between the light bar and the back plate, or between the light bar and the bracket, and the heat-sensitive conductive material automatically adjusts the thermal conductivity according to the temperature change, so that The light bar has different thermal conductivity at different positions, and the temperature of the entire light bar is controlled within a certain range, thereby ensuring the heat conduction effect, thereby ensuring the temperature balance of the backlight module and avoiding the local temperature being too high.
  • the brightness reduction phenomenon of the entire backlight module occurs, and the contact between the light bar and the back plate or the light bar and the bracket is tighter due to the filling of the heat sensitive material, thereby avoiding the heat conduction effect in the prior art.
  • the special processing of the stent reduces the cost.
  • FIG. 1 is a schematic structural view of a conventional LED backlight module
  • FIG. 2 is a schematic structural view of an embodiment of a backlight module of the present invention.
  • FIG. 3 is a schematic perspective view of the back plate and the light bar of FIG. 2;
  • FIG. 4 is a schematic structural view of still another embodiment of a backlight module of the present invention. detailed description
  • a schematic diagram of a backlight module includes: a backplane 100, a light bar 200 disposed in the backplane 100, and a backlight 100 and a light
  • the heat-sensitive and thermally conductive material 300 between the strips 200, the reflective sheet 500 disposed in the back sheet 100, the light guide plate 600 disposed on the reflective sheet 500, and the optical component 700 disposed on the light guide plate 600, emitted by the light bar 200 The light enters the light guide plate 600 directly or through the reflective sheet 500, thereby providing the optical assembly 700 with a uniform surface light source of uniform brightness.
  • the backplane 100 includes a bottom plate 101 and a side plate 102 connected to the bottom plate 101.
  • the bottom plate 101 and the side plate 102 form an accommodating space 103.
  • the light bar 200, the reflective sheet 500, the light guide plate 600 and the optical component The light bar 200 is disposed in the accommodating space 103.
  • the light bar 200 is disposed on the side plate 102 of the back plate 100, and the reflective sheet 500 is disposed on the bottom plate 101.
  • the light guide plate 600 is disposed on the reflective sheet 500.
  • the optical component 700 is disposed on the light guide plate 600, and is assembled into a one-side backlight module.
  • the light bar 200 is directly mounted on the side plate 102 of the back plate 100, and the heat conductive material 300 is disposed between the side plate 102 of the back plate 100 and the light bar 200.
  • the thermal conductivity material of the negative temperature coefficient, the thermal conductivity of the thermal conductive material 300 decreases exponentially with increasing temperature, and when the temperature at different positions of the light bar 200 is different (high or low), corresponding to the position
  • the thermal conductivity of the heat-sensitive conductive material 300 is also different. When the temperature at the position is high, the thermal conductivity of the heat-sensitive conductive material 300 at the corresponding position is correspondingly reduced, and the heat conduction effect at the position is enhanced.
  • the thermal conductivity of the heat-sensitive conductive material 300 at the corresponding position is correspondingly increased, the heat conduction effect at the position is weakened, and the temperature of the light bar 200 is controlled within a certain range, thereby further ensuring The temperature of the entire backlight module is balanced to avoid the reduction of the brightness of the entire backlight module due to excessive local temperature. happened.
  • FIG. 4 is a schematic structural view of a backlight module of the present invention.
  • the back panel 100 ′ of the backlight module further includes a bracket 104 , and the light bar 200 is mounted on the bracket 104 , and the heat is mounted on the bracket 104 .
  • the sensitive heat conductive material 300 is disposed between the bracket 104 and the light bar 200.
  • the bracket is made of a metal material with better heat conduction effect, such as aluminum material, which is more favorable for adjusting the temperature balance of the backlight module.
  • the thermal conductivity of the heat-sensitive conductive material 300 at the corresponding position is also different, when the temperature at the position is high, Correspondingly, the thermal conductivity of the heat-sensitive conductive material 300 at the corresponding position is reduced, and the heat conduction effect at the position is enhanced.
  • the temperature at the position is low, the thermal conductivity of the heat-sensitive and thermal conductive material 300 corresponding to the position is increased. Large, weakening the heat conduction effect at the position, and further controlling the temperature of the light bar 200 within a certain range, further ensuring the temperature balance of the entire backlight module, and avoiding the entire backlight module due to the local temperature being too high. Degree reduction occurs.
  • the backlight module of the present invention provides a heat-sensitive and heat-conducting material between the light bar and the back plate, or between the light bar and the bracket, and the heat-sensitive and heat-conductive material automatically adjusts the thermal conductivity according to the temperature change, so that the light bar is at different positions. It has different thermal conductivity, and then the temperature of the whole light bar is controlled within a certain range, which ensures the heat conduction effect, thereby ensuring the temperature balance of the backlight module, and avoiding the entire backlight module due to the local temperature being too high.

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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)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

一种背光模组，其包括：背板（100）、安装于背板（100）上的灯条（200）及设于背板（100）及灯条（200）之间的热敏导热材料（300）。该背光模组在灯条（200）与背板（100）、或灯条（200）与支架（104）之间设置热敏导热材料（300），该热敏导热材料（300）根据温度变化自动调节导热系数，使得灯条（200）不同位置处具有不同的导热系数，进而将整条灯条（200）的温度控制在一定范围内，保证了导热效果，进而保证了背光模组的温度均衡性，避免由于局部温度过高而导致的整个背光模组辉度降低现象的发生，且由于热敏导热材料（300）的填充，使得灯条（200）与背板（100）、或灯条（200）与支架（104）之间的接触更紧密，避免了现有技术中为了保证导热效果而对支架（104）进行特殊加工的工序，进而降低了成本。

Description

背光模组
技术领域
本发明涉及液晶显示领域， 尤其涉及一种具有良好导热性的背光模 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， 其包括液晶面板及背光模组 ( backlight module ) 。 液晶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发光光源例如 CCFL(Cold Cathode Fluorescent Lamp , 阴极萤光灯管）或 LED(Light Emitting Diode发光二极管)设置在液晶面板后方， 直接形成面光源提供给 液晶面板。 而侧入式背光模组是将发光光源 LED 灯条（lightbar )设于液 晶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 晶面板。
现有的 LED 背光模组的散热设计中， 通常是釆用灯条固定在支架 上， 支架再固定在背板上， 固定方式一般釆用螺丝锁附或者散热胶带， 前 者容易在灯条和支架之间形成空气热阻， 降低散热效果， 后者由于导热系 数很低， 严重的影响了散热效果； 另外在工作中整个灯条中间温度较高， 两侧温度较低， 经常需要针对支架做特殊的加工， 以保证整条支架的温度 平衡， 避免因温度的局部过高， 造成画面的显示异常， 但这样带来的后果 是支架的加工成本增加。
为解决上述问题， 中国专利 201120142696.3公开了一种 LED背光源 以及液晶面板（如图 1所示） ， 该 LED背光源包括背板 1、 设置于背板 1 上的导热块 2和设置在导热块 2上的 LED灯条 4, 该 LED背光源还包括 有热管 3 , 所述热管 3的热端与导热块 2接触， 热管 3的冷端设置在远离 LED灯条 4 的位置并与背板 1 接触。 从而使整个背板温度均勾， 延长了 LED 灯条的使用寿命。 然而， 这种技术方案却在很大程度上增加了 LED 背光模组的成本， 且结构件多， 不方便组装， 进而导致组装不良率高。 发明内容
本发明的目的在于本发明提供一种背光模组， 其通过热敏导热材料自 动调节导热系数， 有利于将灯条的温度控制在一定范围内， 进而保证了背 光模组的温度均衡性。
为实现上述目的， 本发明提供一种背光模组， 包括： 背板、 安装于背 板上的灯条及设于背板及灯条之间的热敏导热材料。
所述热敏导热材料为负温度系数的热敏导热材料， 其导热系数随温度 上升呈指数关系减小。
所述背板包括底板及连接于该底板上的侧板， 该侧板与底板形成一容 置空间， 所述灯条及热敏导热材料容置于该容置空间内。
所述灯条安装于所述背板的侧板上， 所述热敏导热材料设于灯条与所 述侧板之间。
所述背板还包括容置于所述容置空间内的支架， 所述灯条安装于该支 架上， 所述支架安装于所述背板的侧板上， 所述热敏导热材料设于灯条与 支架之间。
还包括容置于所述容置空间内的反射片、 设于反射片上的导光板及设 于导光板上的光学组件， 所述反射板设于所述背板的底板上。
所述灯条为线性 LED灯条。
本发明的有益效果： 本发明所提供的背光模组， 其在灯条与背板、 或 灯条与支架之间设置热敏导热材料， 该热敏导热材料根据温度变化自动调 节导热系数， 使得灯条不同位置处具有不同的导热系数， 进而将整条灯条 的温度控制在一定范围内， 保证了导热效果， 进而保证了背光模组的温度 均衡性， 避免由于局部温度过高而导致的整个背光模组辉度降低现象的发 生， 且由于热敏导热材料的填充， 使得灯条与背板、 或灯条与支架之间的 接触更紧密， 避免了现有技术中为了保证导热效果而对支架进行特殊加工 的工序， 进而降低了成本。
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为现有 LED背光模组的结构示意图；
图 2为本发明背光模组一实施例的结构示意图；
图 3为图 2中背板及灯条的立体结构示意图；
图 4为本发明背光模组的又一实施例的结构示意图。 具体实施方式
为更进一步阐述本发明所釆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 2及图 3 , 为本发明背光模组一实施例的结构示意图， 本发 明背光模组包括： 背板 100、 设于背板内 100 的灯条 200、 设于背板 100 与灯条 200之间的热敏导热材料 300、 设于背板 100 内的反射片 500、 设 于反射片 500上的导光板 600及设于导光板 600上的光学组件 700, 灯条 200 所发出的光线直接、 或经由反射片 500反射后进入导光板 600, 进而 为光学组件 700提供亮度均匀的面光源。
所述背板 100包括底板 101及连接于该底板 101的侧板 102, 该底板 101与该侧板 102形成一容置空间 103 , 所述灯条 200、 反射片 500、 导光 板 600及光学组件 700都容置于该容置空间 103内， 所述灯条 200选用线 性 LED灯条， 该灯条 200设置于所述背板 100的侧板 102上， 所述反射 片 500设于该底板 101上， 所述导光板 600设于该反射片 500上， 所述光 学组件 700设于该导光板 600上， 进而组装成一侧入式背光模组。
优选的， 所述灯条 200直接安装于背板 100的侧板 102上， 热敏导热 材料 300设置于该背板 100的侧板 102与该灯条 200之间 , 该热敏导热材 料 300为负温度系数的热敏导热材料， 该热敏导热材料 300的导热系数随 温度上升呈指数关系减小， 当灯条 200不同位置处的温度不同 （偏高或偏 低） 时， 对应该位置处的热敏导热材料 300 的导热系数也随之不同， 当该 位置处的温度偏高时， 对应该位置处的热敏导热材料 300 的导热系数对应 减小， 增强该位置处的导热效果， 当该位置处的温度偏低时， 对应该位置 处的热敏导热材料 300 的导热系数对应增大， 减弱该位置处的导热效果， 进而将灯条 200 的温度控制在一定范围内， 进一步保证了整个背光模组温 度的均衡性， 避免由于局部温度过高而导致的整个背光模组辉度降低现象 的发生。
请参阅图 4, 为本发明背光模组又一实施例的结构示意图， 在本实施 例背光模组的背板 100'还包括一支架 104, 所述灯条 200安装于支架 104 上， 而热敏导热材料 300设置于该支架 104与该灯条 200之间， 所述支架 釆用导热效果较好的金属材料制成， 如铝材， 更有利于调整背光模组温度 的均衡性。 同理， 当灯条 200 不同位置处的温度不同 （偏高或偏低） 时， 对应该位置处的热敏导热材料 300 的导热系数也随之不同， 当该位置处的 温度偏高时， 对应该位置处的热敏导热材料 300 的导热系数对应减小， 增 强该位置处的导热效果， 当该位置处的温度偏低时， 对应该位置处的热敏 导热材料 300 的导热系数对应增大， 减弱该位置处的导热效果， 进而将灯 条 200 的温度控制在一定范围内， 进一步， 保证了整个背光模组温度的均 衡性， 避免由于局部温度过高而导致的整个背光模组辉度降低现象的发 生。
综上所述， 本发明背光模组通过在灯条与背板、 或灯条与支架之间设 置热敏导热材料， 该热敏导热材料根据温度变化自动调节导热系数， 使得 灯条不同位置处具有不同的导热系数， 进而将整条灯条的温度控制在一定 范围内， 保证了导热效果， 进而保证了背光模组的温度均衡性， 避免由于 局部温度过高而导致的整个背光模组辉度降低现象的发生， 且由于热敏导 热材料的填充， 使得灯条与背板、 或灯条与支架之间的接触更紧密， 避免 了现有技术中为了保证导热效果而对支架进行特殊加工的工序， 进而降低 了成本。
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、 安装于背板上的灯条及设于背板及 灯条之间的热敏导热材料。
2、 如权利要求 1 所述的背光模组， 其中， 所述热敏导热材料为负温 度系数的热敏导热材料， 其导热系数随温度上升呈指数关系减小。
3、 如权利要求 1 所述的背光模组， 其中， 所述背板包括底板及连接 于该底板上的侧板， 该侧板与底板形成一容置空间， 所述灯条及热敏导热 材料容置于该容置空间内。
4、 如权利要求 3 所述的背光模组， 其中， 所述灯条安装于所述背板 的侧板上 , 所述热敏导热材料设于灯条与所述侧板之间。
5、 如权利要求 3 所述的背光模组， 其中， 所述背板还包括容置于所 述容置空间内的支架， 所述灯条安装于该支架上， 所述支架安装于所述背 板的侧板上 , 所述热敏导热材料设于灯条与支架之间。
6、 如权利要求 3 所述的背光模组， 其中， 还包括容置于所述容置空 反射板设于所述背板的底板上。 " ' ' ' ^ ；
7、 如权利要求 1 所述的背光模组， 其中， 所述灯条为线性 LED 灯 条。
PCT/CN2012/072506 2012-02-15 2012-03-19 背光模组 WO2013120298A1 (zh)

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