WO2013170509A1 - 散热铝挤结构及相应的背光模块 - Google Patents

散热铝挤结构及相应的背光模块 Download PDF

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Publication number
WO2013170509A1
WO2013170509A1 PCT/CN2012/076550 CN2012076550W WO2013170509A1 WO 2013170509 A1 WO2013170509 A1 WO 2013170509A1 CN 2012076550 W CN2012076550 W CN 2012076550W WO 2013170509 A1 WO2013170509 A1 WO 2013170509A1
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WIPO (PCT)
Prior art keywords
guide plate
light guide
contact
light
connecting portion
Prior art date
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PCT/CN2012/076550
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English (en)
French (fr)
Inventor
阙成文
陈仕祥
王甲强
Original Assignee
深圳市华星光电技术有限公司
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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 DE112012006373.2T priority Critical patent/DE112012006373B4/de
Priority to US13/639,471 priority patent/US9039267B2/en
Publication of WO2013170509A1 publication Critical patent/WO2013170509A1/zh

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    • 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
    • G02B6/0085—Means for removing heat created by the light source from 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
    • G02F1/133314—Back frames
    • 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 backlights, and more particularly to a low-cost heat-dissipating aluminum extruded structure and a corresponding backlight module.
  • the liquid crystal display device comprises a display panel and a backlight module
  • the original backlight module generally uses CCFL (Cold Cathode Fluorescent Lamp, Cold) Cathode Fluorescent Lamp) as a backlight, but with LEDs (Light Emitting, Light Emitting) Diode)
  • CCFL Cold Cathode Fluorescent Lamp, Cold
  • LEDs Light Emitting, Light Emitting Diode
  • FIG. 1 is a schematic structural diagram of a conventional backlight module, wherein the backlight module includes a light guide plate 10 , an LED light bar 11 , a heat dissipation aluminum extrusion structure 12 , a reflection sheet 13 , and a back plate 14 , wherein the LED light bar 11 is fixed.
  • the heat radiated by the LED strip 11 is taken away by the heat dissipating aluminum extruded structure 12.
  • the heat dissipation aluminum extrusion structure 12 also needs to support the light guide plate 10 and the reflection sheet 13, the heat dissipation aluminum extrusion structure 12 has a large volume and consumes a large amount of aluminum material, resulting in a high cost of the heat dissipation aluminum extrusion structure 12.
  • the object of the present invention is to provide a low-cost heat-dissipating aluminum extruded structure and a corresponding backlight module, so as to solve the technical problem that the existing heat-dissipating aluminum extruded structure has a large volume, resulting in high cost of the heat-dissipating aluminum extruded structure and the corresponding backlight module. .
  • the invention relates to a heat dissipating aluminum extrusion structure, comprising: a light source connecting portion connected to an LED light source; a back plate connecting portion connected to the light source connecting portion and in contact with the back plate surface; and a light guide plate supporting portion facing the light guide plate a direction protruding from the backplane connecting portion for supporting the light guide plate, comprising: a contact member for supporting the light guide plate and being in surface contact with the light guide plate; and a support member for connecting a contact portion of the contact member and the back plate, an area of a contact surface of the contact member and the light guide plate is larger than an area of a horizontal cross section of the support member, and a horizontal cross section of the support member is parallel to the light guide plate a plane of the light exiting surface; the contact member is provided with a plurality of fin heat dissipating units, and the fin heat dissipating unit is in contact with the light guide plate.
  • the light guide plate support portion has an inverted "L" shape.
  • the light guide plate support portion has a hollow trapezoidal shape.
  • a reflection sheet is disposed between the light guide plate support portion and the light guide plate.
  • the invention also relates to a heat dissipating aluminum extrusion structure, comprising: a light source connecting portion connected to the LED light source; a back plate connecting portion connected to the light source connecting portion, in contact with the back plate surface; and a light guide plate supporting portion, guiding The direction of the light plate protrudes from the back plate connecting portion for supporting the light guide plate.
  • the light guide plate support portion includes: a contact member for supporting the light guide plate and being in surface contact with the light guide plate; and a support member for connecting the contact And a connecting portion of the backboard.
  • an area of a contact surface of the contact member with the light guide plate is larger than an area of a horizontal section of the support member, and a horizontal section of the support member is parallel to the light guide plate. The plane of the light surface.
  • the contact member is provided with a plurality of fin heat dissipation units, and the fin heat dissipation unit is in contact with the light guide plate.
  • the light guide plate support portion has an inverted "L" shape.
  • the light guide plate support portion has a hollow trapezoidal shape.
  • a reflection sheet is disposed between the light guide plate support portion and the light guide plate.
  • the invention also relates to a backlight module, which comprises an LED light source for providing a backlight to a corresponding display panel; a light guide plate disposed on a side of the light emitting surface of the LED light source; and a back plate for setting a device thereon
  • the LED light source and the light guide plate and the heat dissipation aluminum extrusion structure, comprising: a light source connection portion connected to the LED light source; and a back plate connection portion connected to the light source connection portion to be in surface contact with the back plate;
  • the light guide plate supporting portion protrudes from the back plate connecting portion toward the light guide plate for supporting the light guide plate.
  • the light guide plate supporting portion includes: a contact member for supporting the light guide plate and being in surface contact with the light guide plate; and a support member for connecting the contact member and The backboard connection portion.
  • the area of the contact surface of the contact member with the light guide plate is larger than the area of the horizontal cross section of the support member, and the horizontal cross section of the support member is parallel to the light output of the light guide plate.
  • the plane of the face is defined by
  • the contact member is provided with a plurality of fin heat dissipating units, and the fin heat dissipating unit is in contact with the light guide plate.
  • the light guide plate support portion has an inverted "L" shape.
  • the light guide plate support portion has a hollow trapezoidal shape.
  • a reflective sheet is disposed between the light guide plate supporting portion and the light guide plate.
  • the heat dissipation aluminum extrusion structure and the corresponding backlight module of the present invention separate the contact member for dissipating heat from the light guide plate and the support member for supporting the light guide plate, thereby The use amount of the aluminum material is reduced, and the heat-dissipating aluminum extruded structure has low manufacturing cost and good heat dissipation effect, and solves the technical problem that the existing heat-dissipating aluminum extruded structure has a large volume, resulting in high cost of the heat-dissipating aluminum extruded structure and the corresponding backlight module. .
  • FIG. 1 is a schematic structural view of a conventional backlight module
  • FIG. 2 is a schematic structural view of a first preferred embodiment of a backlight module of the present invention
  • FIG. 3 is a schematic structural view of a second preferred embodiment of a backlight module of the present invention.
  • FIG. 4 is a schematic structural view of a third preferred embodiment of a backlight module of the present invention.
  • heat dissipation aluminum extrusion structure 223, 323, 423, light guide plate support;
  • FIG. 2 is a schematic structural view of a first preferred embodiment of a backlight module of the present invention.
  • the backlight module includes an LED light source 21, a light guide plate 20, a back plate 24, and a heat dissipating aluminum extruded structure 22.
  • the LED light source 21 is used to provide a backlight to the corresponding display panel 25;
  • the light guide plate 20 is disposed on the light emitting surface side of the LED light source 21 to guide the light of the LED light source 21;
  • the back plate 24 is used to set the LED light source 21 thereon.
  • a light guide plate 20 is used to set the LED light source 21 thereon.
  • the heat dissipation aluminum extrusion structure 22 includes a light source connection portion 221, a back plate connection portion 222, and a light guide plate support portion 223.
  • the light source connecting portion 221 is connected to the LED light source 21;
  • the backing plate connecting portion 222 is connected to the light source connecting portion 221 and is in surface contact with the backing plate 24;
  • the light guide plate supporting portion 223 is protruded from the backing plate connecting portion 222 toward the light guiding plate 20;
  • the light guide plate supporting portion 223 includes a contact member 2231 for supporting the light guide plate 20 and is in surface contact with the light guide plate 20, and a support member 2232 for connecting the above-mentioned contact member 2231 and the back plate connecting portion 222.
  • the light guide plate supporting portion 223 of the heat dissipating aluminum extruded structure 22 of the present invention has an inverted "L" shape, and the contact surface area of the contact member 2231 of the light guide plate supporting portion 223 and the light guide plate 20 is larger than that of the light guide plate.
  • the area of the horizontal section of the support 2232 of the portion 223, the horizontal section of the support 2232 is parallel to the plane of the light exit surface of the light guide plate 20.
  • the contact surface of the contact member 2231 and the light guide plate 20 has a large area, so that the light guide plate 20 can be better radiated to ensure the normal operation of the light guide plate 20; and the support member 2232 functions only for supporting the contact member 2231, so the support
  • the area of the horizontal section of the piece 2232 can be designed to be as small as possible to achieve the effect of saving aluminum.
  • the LED light source 21 can be, for example, an LED light bar (Light). Bar), which comprises a circuit board and a light-emitting component (for example, an LED die), and the circuit board is, for example, a printed circuit board (Printed circuit) Board, PCB) or flexible printed circuit board (Flexible Printed Circuits, FPC), the lighting components are set on the circuit board.
  • the LED light source 21 has a light-emitting surface for emitting light into the light guide plate 20.
  • the light-emitting surface is preferably a plane, which can be formed, for example, on the surface of the light-emitting component, and the light-emitting surface of the LED light source 21 is preferably substantially perpendicular to the LED.
  • the direction of the light emitted by the light source 21 i.e., the direction of incidence when the light enters the light guide plate 20).
  • the light guide plate 20 of the present embodiment is formed into a flat plate structure by, for example, injection molding, and the material thereof is, for example, a photocurable resin, polymethyl methacrylate (PMMA) or polycarbonate (PC).
  • the light guide plate 20 includes a light emitting surface, a light reflecting surface, and a side light incident surface.
  • the light-emitting surface is located on the front surface of the light guide plate 20 for allowing light to be emitted from the light guide plate 20 to the display panel 25.
  • the light-reflecting surface is located on the bottom surface of the light guide plate 20 and opposite to the light-emitting surface.
  • the side light incident surface of the light guide plate 20 is formed on one side or opposite sides of the light guide plate 20, which corresponds to the light exit surface of the LED light source 21, to allow the light emitted by the LED light source 21 to enter the light guide plate 20, and the side
  • the light entrance surface can be substantially perpendicular to the light exit surface.
  • the back sheet 24 of the present embodiment is made of an opaque material such as a plasticized material, a metal material or a combination of the above materials.
  • the backlight module in this embodiment may further include a reflective sheet 23 disposed between the light guide plate supporting portion 223 and the light guide plate 20 (ie, on the bottom surface of the light guide plate 20) such that the contact member 2231 passes through the reflective sheet 23 Indirect surface contact with the light guide plate 20.
  • the reflective sheet 23 is, for example, a reflective film or a reflective coating having a high reflectivity material for reflecting light traveling to the light reflecting surface.
  • the high reflectivity material may be, for example, silver, aluminum, gold, chromium, copper, indium, antimony, nickel, platinum, rhodium, iridium, tin, antimony, tungsten, manganese, an alloy of any combination thereof, yellowing resistant and heat resistant.
  • the light reflecting surface of the light guide plate 20 can also be coated with the high reflectivity material to reflect the incident light, so that the reflective sheet 23 can be further replaced and omitted.
  • the heat dissipating aluminum extruded structure 22 is not only used for dissipating heat to the light guide plate 20, but also dissipates heat to the reflective sheet 23, thereby avoiding the reflection sheet 23 being caused by the excessive temperature of the reflective sheet 23. song.
  • the heat radiated from the LED light source 21 can be transmitted to the backplane connecting portion 222 through the light source connecting portion 221 of the heat dissipating aluminum extruded structure 22, and finally transferred to the backing plate 24.
  • the light source connecting portion 221 is disposed at the bottom of the LED light source 21 to ensure the contact between the heat dissipating aluminum extruded structure 22 and the largest area of the LED light source 21, thereby achieving an optimal heat dissipation effect.
  • the heat generated by the light guide plate 20 during the light transmission can be transmitted to the support member 2232 of the light guide plate support portion 223 through the contact member 2231 of the light guide plate support portion 223, and then transmitted to the back plate connection portion 222, and finally transmitted to the back plate 24.
  • the large area of the contact surface of the contact member 2231 and the light guide plate 20 (here, the direct contact surface or the indirect contact surface) achieves an optimal heat dissipation effect on the light guide plate 20 and the reflection sheet 23 disposed on the bottom surface of the light guide plate 20.
  • the backlight module of the present invention greatly saves the manufacturing cost of the heat dissipation aluminum extruded structure 22.
  • Table 1 is a comparison table between the heat dissipation effect of the backlight module of the prior art and the backlight module of the first preferred embodiment of the present invention and the amount of aluminum used.
  • the pad temperature of the LED light source 21 (reflecting the temperature of the LED light source 21) and the temperature of the contact member 2231 (reflecting the temperature of the light guide plate 20) A slight decrease, but the difference is not large, indicating that the heat dissipation efficiency of the two is similar, but the volume of the heat dissipation aluminum extrusion structure 22 of the present invention can be greatly reduced.
  • the heat dissipation aluminum extrusion structure 22 of the present invention uses only the aluminum material of the existing heat dissipation aluminum extrusion structure. The use of 60% of the amount greatly saves the manufacturing cost of the heat-dissipating aluminum extruded structure 22.
  • FIG. 3 is a schematic structural view of a second preferred embodiment of the backlight module of the present invention.
  • the light guide plate supporting portion 323 in this embodiment has a hollow trapezoidal shape.
  • the area of the contact surface of the light guide plate supporting portion 323 of the structure and the light guide plate 20 is still larger than the horizontal cross-sectional area of the support member 3232 of the light guide plate supporting portion 323, and the heat dissipation performance of the light guide plate 20 can be ensured. Save the effect of aluminum.
  • the stability of the hollow trapezoidal light guide plate supporting portion 323 is better, and the effective contact of the contact member 3231 with the light guide plate 20 is ensured.
  • FIG. 4 is a schematic structural view of a third preferred embodiment of the backlight module of the present invention.
  • the contact member 4231 of the light guide plate supporting portion 423 in the embodiment is provided with a plurality of fin heat dissipating units that are in contact with the light guide plate 20.
  • the design of the fin heat dissipating unit can further reduce the amount of aluminum used for dissipating the aluminum extruded structure, and the fin heat dissipating unit can further enhance the heat dissipating effect of the contact member 4231 on the light guide plate 20.
  • the fin heat dissipating unit can be disposed on the contact member 4231 of the other shape of the light guide plate supporting portion 423, and the same technical effect of saving aluminum material and enhancing heat dissipation can be achieved.
  • the heat dissipating aluminum extruded structure and the corresponding backlight module of the invention separate the contact member for dissipating heat from the light guide plate and the support member for supporting the light guide plate, thereby reducing the use amount of the aluminum material, and the manufacturing cost of the heat dissipating aluminum extruded structure is low
  • the heat dissipation effect is good, and the technical problem that the existing heat dissipation aluminum extrusion structure is large, which leads to high cost of the heat dissipation aluminum extrusion structure and the corresponding backlight module is solved.

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

Abstract

提供一种散热铝挤结构（22）以及相应的背光模块，该结构（22）包括光源连接部（221），背板连接部（222）和导光板支撑部（223）。本结构以及相应的背光模块成本低，散热效果好，能解决现有的散热铝挤结构体积大，成本高的问题。

Description

散热铝挤结构及相应的背光模块 技术领域
本发明涉及背光领域，特别是涉及一种低成本的散热铝挤结构及相应的背光模块。
 背景技术
随着显示器技术快速的进步与发展，越来越多的人们开始使用液晶显示装置，以满足其较高的画面品质要求。其中液晶显示装置包括显示面板和背光模块，原有的背光模块一般使用CCFL（冷阴极萤光灯管，Cold Cathode Fluorescent Lamp）作为背光源，但随着LED（发光二级管，Light Emitting Diode）技术的发展，因LED光源具有低能耗、长寿命等优点，背光模块使用的CCFL的背光源逐渐被LED光源所代替。
但是LED光源的发光效率受其工作温度的影响较大，因此设计者通常会在背光模块中，设计给LED光源进行散热的散热铝挤结构。如图1所示，图1为现有背光模块的结构示意图，其中背光模块包括导光板10、LED灯条11、散热铝挤结构12、反射片13以及背板14，其中LED灯条11固定在散热铝挤结构12上，通过散热铝挤结构12带走LED灯条11所散发的热量。
由于散热铝挤结构12同时还需要支撑导光板10和反射片13，所以散热铝挤结构12的体积较大，消耗的铝材较多，导致散热铝挤结构12的成本较高。
故，有必要提供一种散热铝挤结构及相应的背光模块，以解决现有技术所存在的问题。
 技术问题
本发明的目的在于提供一种成本低的散热铝挤结构及相应的背光模块，以解决现有的散热铝挤结构体积较大，导致散热铝挤结构及相应的背光模块成本较高的技术问题。
 技术解决方案
本发明涉及一种散热铝挤结构，其包括：光源连接部，与LED光源连接；背板连接部，与所述光源连接部连接，与背板面接触；以及导光板支撑部，朝导光板的方向，凸出于所述背板连接部，用于支撑所述导光板，包括：接触件，用于支撑所述导光板，并与所述导光板面接触；以及支撑件，用于连接所述接触件与所述背板连接部，所述接触件与所述导光板的接触面的面积大于所述支撑件的水平截面的面积，所述支撑件的水平截面平行于所述导光板的出光面的所在平面；所述接触件设置有多个鳍片散热单元，所述鳍片散热单元与所述导光板接触。
在本发明所述的散热铝挤结构中，所述导光板支撑部呈倒置的“L”型。
在本发明所述的散热铝挤结构中，所述导光板支撑部呈中空的梯形。
在本发明所述的散热铝挤结构中，所述导光板支撑部与所述导光板之间设置有反射片。
本发明还涉及一种散热铝挤结构，其包括：光源连接部，与LED光源连接；背板连接部，与所述光源连接部连接，与背板面接触；以及导光板支撑部，朝导光板的方向，凸出于所述背板连接部，用于支撑所述导光板。
在本发明所述的散热铝挤结构中，所述导光板支撑部包括：接触件，用于支撑所述导光板，并与所述导光板面接触；以及支撑件，用于连接所述接触件与所述背板连接部。
在本发明所述的散热铝挤结构中，所述接触件与所述导光板的接触面的面积大于所述支撑件的水平截面的面积，所述支撑件的水平截面平行于所述导光板的出光面的所在平面。
在本发明所述的散热铝挤结构中，所述接触件设置有多个鳍片散热单元，所述鳍片散热单元与所述导光板接触。
在本发明所述的散热铝挤结构中，所述导光板支撑部呈倒置的“L”型。
在本发明所述的散热铝挤结构中，所述导光板支撑部呈中空的梯形。
在本发明所述的散热铝挤结构中，所述导光板支撑部与所述导光板之间设置有反射片。
本发明还涉及一种背光模块，其包括LED光源，用于给相应的显示面板提供背光源；导光板，设置在所述LED光源的出光面一侧；背板，用于在其上设置所述LED光源以及所述导光板；以及散热铝挤结构，包括：光源连接部，与所述LED光源连接；背板连接部，与所述光源连接部连接，与所述背板面接触；以及导光板支撑部，朝所述导光板的方向，凸出于所述背板连接部，用于支撑所述导光板。
在本发明所述的背光模块中，所述导光板支撑部包括：接触件，用于支撑所述导光板，并与所述导光板面接触；以及支撑件，用于连接所述接触件与所述背板连接部。
在本发明所述的背光模块中，所述接触件与所述导光板的接触面的面积大于所述支撑件的水平截面的面积，所述支撑件的水平截面平行于所述导光板的出光面的所在平面。
在本发明所述的背光模块中，所述接触件设置有多个鳍片散热单元，所述鳍片散热单元与所述导光板接触。
在本发明所述的背光模块中，所述导光板支撑部呈倒置的“L”型。
在本发明所述的背光模块中，所述导光板支撑部呈中空的梯形。
在本发明所述的背光模块中，所述导光板支撑部与所述导光板之间设置有反射片。
 有益效果
相较于现有的散热铝挤结构及相应的背光模块，本发明的散热铝挤结构及相应的背光模块将用于给导光板散热的接触件和用于支撑导光板的支撑件分离，从而减少了铝材的使用量，该散热铝挤结构制作成本低、散热效果好，解决了现有的散热铝挤结构体积较大，导致散热铝挤结构及相应的背光模块成本较高的技术问题。
 附图说明
图1为现有的背光模块的结构示意图；
图2为本发明的背光模块的第一优选实施例的结构示意图；
图3为本发明的背光模块的第二优选实施例的结构示意图；
图4为本发明的背光模块的第三优选实施例的结构示意图。
其中，附图标记说明如下：
20、导光板； 221、光源连接部；
21、LED光源； 222、背板连接部；
22、散热铝挤结构； 223、323、423、导光板支撑部；
23、反射片； 2231、3231、4231、接触件；
24、背板； 2232、3232、支撑件；
25、显示面板。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
在图中，结构相似的单元是以相同标号表示。
请参照图2，图2为本发明的背光模块的第一优选实施例的结构示意图。该背光模块包括LED光源21、导光板20、背板24以及散热铝挤结构22。其中LED光源21用于给相应的显示面板25提供背光源；导光板20设置在LED光源21的出光面一侧，以引导LED光源21的光线；背板24用于在其上设置LED光源21以及导光板20。
在本实施例中，散热铝挤结构22包括光源连接部221、背板连接部222以及导光板支撑部223。光源连接部221与LED光源21连接；背板连接部222与光源连接部221连接，同时与背板24面接触；导光板支撑部223朝导光板20的方向，凸出于背板连接部222。该导光板支撑部223包括接触件2231以及支撑件2232，接触件2231用于支撑导光板20，并与导光板20面接触；支撑件2232用于连接上述的接触件2231以及背板连接部222。
如图2所示，本发明的散热铝挤结构22的导光板支撑部223呈倒置的“L”型，导光板支撑部223的接触件2231与导光板20的接触面的面积大于导光板支撑部223的支撑件2232的水平截面的面积，支撑件2232的水平截面的平行于导光板20的出光面的所在平面。接触件2231与导光板20的接触面的面积较大，可以较好对导光板20进行散热，保证导光板20的正常工作；同时支撑件2232的作用只是用于支撑接触件2231，因此该支撑件2232的水平截面的面积可以设计的尽可能的小，以达到节约铝材的效果。
在本实施例中，LED光源21可例如为LED发光灯条（Light Bar），其包括电路板和发光组件（例如LED晶粒），电路板例如为印刷电路板(Printed circuit board，PCB)或软性印刷电路板(Flexible Printed Circuits，FPC)，发光组件是设置电路板上。LED光源21具有一出光面，用以发出光线至导光板20内，此出光面优选为一平面，其可例如形成于发光组件的表面，且此LED光源21的出光面优选是大致垂直于LED光源21所发出的光线方向(即光线进入导光板20时的入射方向)。
本实施例的导光板20例如是利用射出成型的方式来制成平板形结构，其材料例如为光硬化型树脂、聚甲基丙烯酸甲酯(PMMA)或聚碳酸酯(PC)。导光板20包括有出光面、光反射面及侧入光面。出光面是位于导光板20的正面，用以允许光线由导光板20发出至显示面板25，光反射面是位于导光板20的底面，且相对于出光面。导光板20的侧入光面是形成于导光板20的一侧或相对两侧，其对应于LED光源21的出光面，用以允许LED光源21所发出的光线可进入导光板20内，侧入光面可大致垂直于出光面。
本实施例的背板24是由不透光材质所制成，例如：塑化材料、金属材料或上述材料的组合。
本实施例中的背光模块还可包括反射片23，该反射片23设置在导光板支撑部223与导光板20之间（即导光板20的底面上），这样使得接触件2231通过反射片23与导光板20间接的面接触。反射片23例如为反射膜片或反射涂层，其具有高反射率材料，用以反射行进至光反射面的光线。此高反射率材料可例如为银、铝、金、铬、铜、铟、铱、镍、铂、铼、铑、锡、钽、钨、锰、上述任意组合的合金、耐黄化且耐热的白色反射漆料或上述材料的任意组合，以反射光线。值得注意的是，导光板20的光反射面亦可涂布此高反射率材料，以反射入射光线，因而可进一步取代及省略设置反射片23。在设置有反射片23的背光模块上，散热铝挤结构22不仅用于对导光板20进行散热，同时也对反射片23进行散热，避免了反射片23的温度过高导致的反射片23翘曲。
本发明的背光模块使用时，LED光源21的散发的热量可以通过散热铝挤结构22的光源连接部221传输到背板连接部222，最终传输到背板24上。光源连接部221设置在LED光源21的底部，保证了散热铝挤结构22与LED光源21的最大面积的接触，实现了最佳的散热效果。导光板20在光线传输过程中产生的热量可以通过导光板支撑部223的接触件2231传输到导光板支撑部223的支撑件2232，再传输到背板连接部222，最终传输到背板24上。接触件2231与导光板20的接触面（这里指直接的接触面或间接的接触面）的大面积，实现了对导光板20及设置在导光板20底面的反射片23的最佳的散热效果。同时本发明的背光模块大大节约了散热铝挤结构22的制作成本。
请参照下面的表1，表1为现有技术的背光模块和本发明的第一优选实施例的背光模块的散热效果及铝材使用量的对比表。
Figure PCTCN2012076550-appb-I000001
从表1中可以看出，使用本发明的散热铝挤结构22后，LED光源21的衬垫温度（反映了LED光源21的温度）和接触件2231的温度（反映了导光板20的温度）稍有下降但差异不大，表示两者散热效率差不多，但本发明的散热铝挤结构22的体积确可大幅减少，本发明散热铝挤结构22只用了现有散热铝挤结构的铝材使用量的60%，大幅节约了散热铝挤结构22的制作成本。
请参照图3，图3为本发明的背光模块的第二优选实施例的结构示意图。本优选实施例与第一优选实施例的区别在于，本实施例中的导光板支撑部323呈中空的梯形。这种结构的导光板支撑部323的接触件3231与导光板20的接触面的面积依然大于导光板支撑部323的支撑件3232的水平截面的面积，同样可以达到保证导光板20的散热性能和节约铝材的效果。同时中空梯形的导光板支撑部323的稳定性更佳，保证了接触件3231与导光板20有效的面接触。
请参照图4，图4为本发明的背光模块的第三优选实施例的结构示意图。本优选实施例与第一优选实施例的区别在于，本实施例中的导光板支撑部423的接触件4231上设置有多个鳍片散热单元，该鳍片散热单元与导光板20接触。鳍片散热单元的设计可进一步的减少散热铝挤结构的铝材使用量，同时鳍片散热单元还可进一步加强接触件4231对导光板20的散热效果。当然该鳍片散热单元可设置在其他形状的导光板支撑部423的接触件4231上，均可以达到同样的节省铝材和加强散热的技术效果。
本发明的散热铝挤结构及相应的背光模块将用于给导光板散热的接触件和用于支撑导光板的支撑件分离，从而减少了铝材的使用量，散热铝挤结构的制作成本低、散热效果好，解决了现有的散热铝挤结构体积较大，导致散热铝挤结构及相应的背光模块成本较高的技术问题。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。
 本发明的实施方式
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Claims (18)

  1. 一种散热铝挤结构，其包括：
    光源连接部，与LED光源连接；
    背板连接部，与所述光源连接部连接，与背板面接触；以及
    导光板支撑部，朝导光板的方向，凸出于所述背板连接部，用于支撑所述导光板，包括：
    接触件，用于支撑所述导光板，并与所述导光板面接触；以及
    支撑件，用于连接所述接触件与所述背板连接部，
    所述接触件与所述导光板的接触面的面积大于所述支撑件的水平截面的面积，所述支撑件的水平截面平行于所述导光板的出光面的所在平面；
    所述接触件设置有多个鳍片散热单元，所述鳍片散热单元与所述导光板接触。
  2. 根据权利要求1所述的散热铝挤结构，其中所述导光板支撑部呈倒置的“L”型。
  3. 根据权利要求1所述的散热铝挤结构，其中所述导光板支撑部呈中空的梯形。
  4. 根据权利要求1所述的散热铝挤结构，其中所述导光板支撑部与所述导光板之间设置有反射片。
  5. 一种散热铝挤结构，其包括：
    光源连接部，与LED光源连接；
    背板连接部，与所述光源连接部连接，与背板面接触；以及
    导光板支撑部，朝导光板的方向，凸出于所述背板连接部，用于支撑所述导光板。
  6. 根据权利要求5所述的散热铝挤结构，其中所述导光板支撑部包括：
    接触件，用于支撑所述导光板，并与所述导光板面接触；以及
    支撑件，用于连接所述接触件与所述背板连接部。
  7. 根据权利要求6所述的散热铝挤结构，其中所述接触件与所述导光板的接触面的面积大于所述支撑件的水平截面的面积，所述支撑件的水平截面平行于所述导光板的出光面的所在平面。
  8. 根据权利要求6所述的散热铝挤结构，其中所述接触件设置有多个鳍片散热单元，所述鳍片散热单元与所述导光板接触。
  9. 根据权利要求5所述的散热铝挤结构，其中所述导光板支撑部呈倒置的“L”型。
  10. 根据权利要求5所述的散热铝挤结构，其中所述导光板支撑部呈中空的梯形。
  11. 根据权利要求5所述的散热铝挤结构，其中所述导光板支撑部与所述导光板之间设置有反射片。
  12. 一种背光模块，其包括：
    LED光源，用于给相应的显示面板提供背光源；
    导光板，设置在所述LED光源的出光面一侧；
    背板，用于在其上设置所述LED光源以及所述导光板；以及
    散热铝挤结构，包括：
    光源连接部，与所述LED光源连接；
    背板连接部，与所述光源连接部连接，与所述背板面接触；以及
    导光板支撑部，朝所述导光板的方向，凸出于所述背板连接部，用于支撑所述导光板。
  13. 根据权利要求12所述的背光模块，其中所述导光板支撑部包括：
    接触件，用于支撑所述导光板，并与所述导光板面接触；以及
    支撑件，用于连接所述接触件与所述背板连接部。
  14. 根据权利要求13所述的背光模块，其中所述接触件与所述导光板的接触面的面积大于所述支撑件的水平截面的面积，所述支撑件的水平截面平行于所述导光板的出光面的所在平面。
  15. 根据权利要求13所述的背光模块，其中所述接触件设置有多个鳍片散热单元，所述鳍片散热单元与所述导光板接触。
  16. 根据权利要求12所述的背光模块，其中所述导光板支撑部呈倒置的“L”型。
  17. 根据权利要求12所述的背光模块，其中所述导光板支撑部呈中空的梯形。
  18. 根据权利要求12所述的背光模块，其中所述导光板支撑部与所述导光板之间设置有反射片。
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