CN1936666A - 背光模组 - Google Patents

背光模组 Download PDF

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CN1936666A
CN1936666A CNA2005100375075A CN200510037507A CN1936666A CN 1936666 A CN1936666 A CN 1936666A CN A2005100375075 A CNA2005100375075 A CN A2005100375075A CN 200510037507 A CN200510037507 A CN 200510037507A CN 1936666 A CN1936666 A CN 1936666A
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module backlight
heat
reflection shield
heat pipes
backlight
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CN100437277C (zh
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陈杰良
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Priority to US11/478,409 priority patent/US7273310B2/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/56—Cooling arrangements using liquid coolants
    • F21V29/58—Cooling arrangements using liquid coolants characterised by the coolants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0085—Means for removing heat created by the light source from the package
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—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
    • G02F1/133604—Direct backlight with lamps
    • 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
    • G02B6/0031—Reflecting element, sheet or layer
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, 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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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

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  • General Engineering & Computer Science (AREA)
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  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Planar Illumination Modules (AREA)

Abstract

本发明涉及一种背光模组，其包括：一导光板，其包括一入光面；至少一光源靠近该入光面；和一反光罩靠近并围住该光源，一导热层形成于该反光罩靠近该光源的内侧，以及多个热管与该反光罩相连接。以及涉及另一种背光模组，其包括：一扩散板；多个光源设于该扩散板下方；一反光罩靠近并围住该多个光源，一导热层形成于该反光罩靠近该光源的内侧，以及多个热管与该反光罩连接。本发明的背光模组具有良好的散热效果。

Description

背光模组
【技术领域】
本发明涉及一种背光模组，尤其涉及一种应用于液晶显示装置的背光模组。
【背景技术】
近年来，随着液晶显示器的彩色化和大型化，其应用领域更为广泛，如笔记本式计算机、各种台式计算机、液晶电视等。因液晶显示面板本身不能发光，其是一种被动元件，需利用一光源系统，如背光模组(BacklightModule)，为其提供一面光源，从而显示屏幕画面。
背光模组包括背光源和光学元件如导光板等。依背光源的位置不同，背光模组一般可分为侧光式(Edge Lighting)和直下式(Bottom Lighting)两种。
请参见图1，现有技术的侧光式背光模组10包括一导光板12，其包括一入光面122，至少一光源11靠近该入光面122，和一反光罩14靠近并围住该光源11。
请参见图2，现有技术的直下式背光模组20包括一扩散板22；多个光源21设于该扩散板22下方，一反光罩24设于该多个光源21下方并围住该多个光源21。
上述光源11，21皆可分别采用至少一发光二极管(Light Emitting Diode，LED)点光源或至少一冷阴极灯管(Cold Cathode Fluorescent Lamp，CCFL)线光源。
但是，为满足高亮度以及轻量化的要求，上述光源往往都安装在一个窄小的密闭空间，工作时所产生的热量往往无法顺利散发出去而会不断累积。而且CCFL具有沿直径方向向四周发光的特点，且处于工作状态的CCFL可向其四周射出大量可见光、紫外光和红外光，除一部分光线进入背光模组的导光板或扩散板外，其它部分光线在背光模组内循环传播且产生大量热量。
所以，工作时间稍长就会造成CCFL附近的温度过高，从而降低背光模组的使用寿命以及影响采用该背光模组的液晶显示器的显示品质，如，部份区域的画面容易产生晃动或闪烁等现象，容易大幅缩减周围元件的使用寿命。
有鉴于此，提供一种具有良好散热效果的背光模组实为必要。
【发明内容】
下面将以实施例说明一种具有良好散热性能的背光模组。
一种背光模组，其包括：一导光板，其包括一入光面；至少一光源靠近该入光面；和一反光罩靠近并围住该光源，一导热层形成于该反光罩靠近该光源的内侧，以及多个热管与该反光罩相连接。
以及，另一种背光模组，其包括：一扩散板；多个光源设于该扩散板下方；一反光罩靠近并围住该多个光源，一导热层形成于该反光罩靠近该光源的内侧，以及多个热管与该反光罩相连接。
与现有技术相比较，所述背光模组的反射罩内侧的导热层除反射光线功能外还能更好地传热，将模组产生的热量传导至多个热管，通过热管的热转移机制可将热由模组内部导至模组外部。因此，本发明的背光模组具有良好的散热性能，进而延长背光模组和液晶显示装置的使用寿命。
【附图说明】
图1是现有技术的侧光式背光模组示意图。
图2是现有技术的直下式背光模组示意图。
图3是本发明第一实施例的侧光式背光模组的纵向剖面示意图。
图4是本发明第一实施例的侧光式背光模组的俯视示意图。
图5是本发明第二实施例的直下式背光模组的纵向剖面示意图。
图6是本发明第二实施例的直下式背光模组去掉扩散板后的俯视示意图。
【具体实施方式】
下面将结合附图和实施例对本发明作进一步的详细说明。
请一并参阅图3和图4，本发明第一实施例提供一种侧光式背光模组30包括一导光板32，其包括一入光面322，一冷阴极灯管31靠近该入光面322，和一反光罩34靠近并围住该冷阴极灯管31，一导热层35形成于该反光罩34靠近该冷阴极灯管31的内侧，以及多个热管37通过一热介面材料层36连接该反光罩34。该热介面材料层36能更好的将反光罩34的热量传给该多个热管37。
该反光罩34可为直角或半圆的曲面等结构，该反光罩34的材质可选用铜或铝等金属材料。本实施例中该反光罩34采用铜质直角曲面结构。
该导热层35的材质为具有强反射光线能力的导热金属，如银等，主要用于导热和反射冷阴极灯管31所发的光线进入导光板32。该导热层35是采用直流磁控(Direct Current Magnetron)溅镀而成，厚度为100至1000纳米(nm)。本实施例中该导热层35采用纳米级银粒子层。
本发明的多个热管37可选用与该反光罩34相配合的环路热管、管状热管或平板热管。本实施例中该多个热管37选用管状热管，该热管37的长度方向为沿该反光罩34的轴向垂直方向。为了增加该热管37与热介面材料层36和该反光罩34的接触面积，可将该热管37设计成矩形管状热管。
该热管37是真空密封结构，其管壳内壁形成有多个均匀排列的纳米级尺寸毛细结构如微小凹槽等(图未示)，其内部密封有工作流体。该工作流体包括纯水、氨水、甲醇、丙酮、庚烷等液态物质，该工作流体还可包括悬浮于液态工作流体中的导热材料微粒，如铜粉、纳米碳管、纳米碳球、碳纳米线或内部填充有纳米级铜粉的纳米碳管、纳米碳球、碳纳米线。该毛细结构使该热管具有较好毛细性能。该热管37的毛细作用力能使工作流体沿管壳内壁往各个方向扩散，因此散热均匀，纳米级尺寸使得管壳内表面的传热面积增大，增强热管37传热能力。
该热介面材料层36的材质可选用纳米碳球热介面材料、纳米晶粒热介面材料、纳米粉末热介面材料、纳米复合材料热介面材料以及纳米碳管热介面材料。本实施例中该热介面材料层36优选为均匀填充纳米碳管的硅胶。
为更好的传热，本实施例的背光模组30可进一步包括一散热鳍片38与该多个热管37相连接。该散热鳍片38的一端还可设置一风扇39，用于借助物理作用将热量散至外界。
请一并参阅图5和图6，本发明第二实施例提供一种直下式背光模组40包括：多个冷阴极灯管41、一扩散板42、一反光罩44、一导热层45、一热介面材料层46、多个热管47、一散热鳍片48和一风扇49。
该多个冷阴极灯管41设于该扩散板42下方。该反光罩44设于该多个冷阴极灯管41下方，靠近并围住该多个冷阴极灯管41。该导热层45形成于该反光罩44朝向该冷阴极灯管41的内侧。该多个热管47选用长条管状热管，其包括一热端(未标示)和一冷端(未标示)。该多个热管47的热端通过该热介面材料层46与该反光罩44相连接，且与该反光罩44的侧面相垂直。该多个热管47的冷端与该散热鳍片48底部连接，该风扇49可设置于散热鳍片48的一侧。本实施例的反光罩44、导热层45、热介面材料层46、多个热管47可参考第一实施例所述的相应元件。
可以理解的是，本实施例中该热介面材料层46、散热鳍片48和风扇49为非必要元件，缺少上述元件的背光模组40也能较好的完成散热效果。
可以理解的是，为了达到更好的传热效果，本发明背光模组中反光罩与多个热管的连接可进行以下设计：于反光罩外侧形成多个凹槽，多个热管与该多个凹槽相应紧密连接，或于该多个凹槽内侧形成一热介面材料层再与多个热管紧密连接。此设计可进一步提高背光模组的整体散热能力。另外，本发明的光源也可采用LED。
本发明背光模组的反射罩内侧的导热层除反射光线功能外还能更好地传热，将模组产生的热量传导至与其相连的热介面材料层和多个热管，通过热管的热转移机制可将热由模组内部导至模组外部。因此，本发明的背光模组具有良好的散热性能，进而延长背光模组和液晶显示装置的使用寿命。
另外，本领域技术人员还可在本发明精神内做其他变化，当然，这些依据本发明精神所做的变化，都应包含在本发明所要求保护的范围内。

Claims (18)

1.一种背光模组，其包括：
一导光板，其包括一入光面；
至少一光源靠近该入光面；和
一反光罩靠近并围住该光源，其特征在于该背光模组进一步包括一形成于该反光罩靠近该光源的内侧的导热层，和多个热管与该反光罩相连接。
2.如权利要求1所述的背光模组，其特征在于反光罩包括直角或半圆的曲面结构。
3.如权利要求1所述的背光模组，其特征在于该反光罩由铜或铝材料制成。
4.如权利要求1所述的背光模组，其特征在于该反光罩外侧形成多个凹槽，用于与该多个热管相互紧密连接。
5.如权利要求1所述的背光模组，其特征在于该导热层由银材料制成。
6.如权利要求5所述的背光模组，其特征在于该导热层为纳米级银粒子层，其厚度范围为100至1000纳米。
7.如权利要求1或4所述的背光模组，其特征在于该背光模组进一步包括一热介面材料层，用于连接该多个热管与该反光罩。
8.如权利要求8所述的背光模组，其特征在于该热介面材料层为均匀填充纳米碳管的硅胶。
9.如权利要求1所述的背光模组，其特征在于该多个热管包括环路热管、管状热管或平板热管。
10.如权利要求1所述的背光模组，其特征在于该背光模组进一步包括一连接该多个热管的散热鳍片。
11.如权利要求10所述的背光模组，其特征在于该背光模组进一步包括一设置于该散热鳍片一端的风扇。
12.一种背光模组，其包括：
一扩散板；
多个冷阴极灯管设于该扩散板下方；和
一反光罩靠近并围住该多个冷阴极灯管，其特征在于该背光模组进一步包括一形成于该反光罩靠近该光源的内侧的导热层，和多个热管与该反光罩相连接。
13.如权利要求12所述的背光模组，其特征在于该反光罩包括直角或半圆的曲面结构。
14.如权利要求12所述的背光模组，其特征在于该反光罩外侧形成多个凹槽，用于与该多个热管相互紧密连接。
15.如权利要求12或14所述的背光模组，其特征在于该背光模组进一步包括一热介面材料层，用于连接该多个热管与该反光罩。
16.如权利要求12所述的背光模组，其特征在于该多个热管包括环路热管、管状热管或平板热管。
17.如权利要求12所述的背光模组，其特征在于该背光模组进一步包括一连接该多个热管的散热鳍片。
18.如权利要求17所述的背光模组，其特征在于该背光模组进一步包括一设置于该散热鳍片一端的风扇。
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