WO2014019243A1 - 一种背光模组及液晶显示器 - Google Patents

一种背光模组及液晶显示器 Download PDF

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Publication number
WO2014019243A1
WO2014019243A1 PCT/CN2012/079716 CN2012079716W WO2014019243A1 WO 2014019243 A1 WO2014019243 A1 WO 2014019243A1 CN 2012079716 W CN2012079716 W CN 2012079716W WO 2014019243 A1 WO2014019243 A1 WO 2014019243A1
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WO
WIPO (PCT)
Prior art keywords
connecting portion
backlight module
light guide
hole
back plate
Prior art date
Application number
PCT/CN2012/079716
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English (en)
French (fr)
Inventor
唐国富
萧宇均
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
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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 DE201211006631 priority Critical patent/DE112012006631T5/de
Priority to US13/640,738 priority patent/US8777461B2/en
Publication of WO2014019243A1 publication Critical patent/WO2014019243A1/zh

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    • 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
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
    • 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 display technologies, and in particular, to a backlight module and a liquid crystal display.
  • liquid crystal displays Due to the low operating voltage, low radiation and low power consumption of liquid crystal displays, liquid crystal displays are widely used in various fields, including computers, mobile phones, televisions, and measurement displays.
  • the liquid crystal display includes a liquid crystal display panel and a backlight module, and the liquid crystal display panel itself does not emit light, and the backlight module is required to provide backlight for display.
  • the light guide plate expands due to heat or moisture absorption, and the light source plate will squeeze the light source when it expands, causing the light source to be deformed by pressure, thereby making the internal circuit of the light source abnormal and easily damaging the light source.
  • the surface temperature of the light source is very high, sometimes as high as 80 degrees.
  • the frame of the light source and the potting compound are in a non-rigid state, and the thermal expansion of the light guide plate deforms the forced light source, and the distance between the light guide plate and the light source chip becomes relatively close, thereby causing the light guide plate to withstand the high temperature of the surface of the light source.
  • the glass transition temperature of the light guide plate is generally less than 90 degrees. When the display module is placed at an ambient temperature of 40 degrees, the temperature of the light guide plate to the surface of the light source will exceed 90 degrees, which will exceed the glass transition temperature of the light guide plate. Will soften and destroy the total reflection angle of the light guide plate.
  • the technical problem to be solved by the present invention is to provide a backlight module and a liquid crystal display, so as to effectively prevent the light guide plate from squeezing the light source and effectively reducing the temperature of the light source.
  • a technical solution adopted by the present invention is to provide a backlight module, the backlight module includes: a back plate; a light guide plate, the light guide plate is disposed on one side of the back plate;
  • the heat dissipating member includes a horizontal portion and a vertical portion connected to each other, and the horizontal portion is disposed on the other side of the back plate away from the light guide plate, the vertical portion and the light guide plate a light source disposed adjacent to the light source, the light source being disposed on a side of the vertical portion adjacent to the light incident surface; and a connecting member connecting the heat sink to the back plate And allowing the heat dissipating member to move relative to the back plate in a spacing direction of the light guide plate and the light source;
  • the horizontal portion is provided with a through hole
  • the connecting member includes a first fixed on the back plate a connecting portion, a second connecting portion connected to the first connecting portion and passing through the through hole, and a second connecting portion connected to the second connecting portion and supported by the horizontal
  • the first connecting portion, the second connecting portion, and the third connecting portion are three cylindrical bodies that are coaxially disposed.
  • the connecting member is a screw
  • the back plate is provided with a threaded hole
  • the first connecting portion of the connecting member is fixed in the threaded hole by screwing.
  • the back plate is further provided with a convex hull protruding toward the horizontal portion, the threaded hole is disposed on the convex hull, and the horizontal portion is provided with a recess for receiving the convex hull, the concave
  • the dimension in the spacing direction is larger than the dimension of the convex hull in the spacing direction.
  • the backlight module further includes a reflective sheet disposed between the light guide plate and the back plate, and an optical film disposed on a side of the light guide plate away from the back plate.
  • a backlight module which includes a back plate, a light guide plate, a heat sink, a light source, and a connecting member.
  • the light guide plate is disposed on one side of the back plate.
  • the heat dissipating member includes a horizontal portion and a vertical portion connected to each other, and the horizontal portion is disposed on the other side of the back plate away from the light guide plate, and the vertical portion is disposed adjacent to the light incident surface of the light guide plate.
  • the light source is disposed on a side of the vertical portion that is adjacent to the light incident surface.
  • the connector connects the heat sink to the back plate and allows the heat sink to move relative to the back plate in a spacing direction of the light guide plate and the light source.
  • the connecting portion includes a first connecting portion fixed to the back plate, a second connecting portion connected to the first connecting portion and passing through the through hole, and connected to the second connecting portion. Supported on the third connecting portion on the side of the horizontal portion away from the backing plate, the size of the through hole in the spacing direction is larger than the dimension of the second connecting portion in the spacing direction.
  • the dimension of the through hole in the spacing direction is larger than the dimension of the through hole in the vertical direction of the parallel backing plate in the spacing direction.
  • the dimension of the through hole in the vertical direction of the parallel back plate in the spacing direction is larger than the dimension of the second connecting portion in the vertical direction and smaller than the dimension of the third connecting portion in the vertical direction.
  • the first connecting portion, the second connecting portion and the third connecting portion are three cylindrical bodies arranged coaxially.
  • the connecting member is a screw
  • the back plate is provided with a threaded hole
  • the first connecting portion of the connecting member is fixed in the threaded hole by screwing.
  • the back plate is further provided with a convex hull protruding toward the horizontal portion, the threaded hole is disposed on the convex hull, and the horizontal portion is provided with a recess for accommodating the convex hull, and the dimension of the concave portion in the spacing direction is larger than the convex hull in the spacing direction. size of.
  • the horizontal portion and the vertical portion are integrally formed.
  • the backlight module further includes a reflective sheet disposed between the light guide plate and the back plate, and an optical film disposed on a side of the light guide plate away from the back plate.
  • the liquid crystal display includes a backlight module, the backlight module includes: a back plate; a light guide plate, and the light guide plate is disposed on the back plate.
  • a heat sink the heat sink comprises a horizontal portion and a vertical portion connected to each other, the horizontal portion is disposed on the other side of the back plate away from the light guide plate, and the vertical portion is disposed adjacent to the light incident surface of the light guide plate;
  • the light source is disposed on a side of the vertical portion adjacent to the light incident surface; and the connecting member connects the heat sink to the back plate and allows the heat sink to move relative to the back plate in a spacing direction of the light guide plate and the light source.
  • the horizontal portion is provided with a through hole
  • the connecting member includes a first connecting portion fixed to the back plate, a second connecting portion connected to the first connecting portion and passing through the through hole, and a second connecting portion Connected and supported on the third connecting portion on the side of the horizontal portion away from the back plate, the size of the through hole in the spacing direction is larger than the size of the second connecting portion in the spacing direction.
  • the dimension of the through hole in the spacing direction is larger than the dimension of the through hole in the vertical direction of the parallel backing plate in the spacing direction.
  • the dimension of the through hole in the vertical direction of the parallel back plate in the spacing direction is larger than the dimension of the second connecting portion in the vertical direction and smaller than the dimension of the third connecting portion in the vertical direction.
  • the connecting member is a screw
  • the back plate is provided with a threaded hole, and the first connecting portion of the connecting member is fixed in the threaded hole by screwing
  • the back plate is further provided with a convex hull protruding toward the horizontal portion, and the threaded hole is disposed
  • a recess for accommodating the convex hull is disposed on the horizontal portion, and a dimension of the recess in the spacing direction is larger than a dimension of the convex hull in the spacing direction.
  • the invention has the beneficial effects that the invention can be moved relative to the back plate in the interval direction between the light guide plate and the light source by the heat dissipating member, thereby preventing the light guide plate from expanding and squeezing the light source, and at the same time
  • the horizontal portion is placed on the outside of the back plate away from the light guide plate, so that the heat sink is in direct contact with the outside air, and the heat dissipation of the heat sink is accelerated, thereby effectively reducing the temperature of the light source.
  • FIG. 1 is a schematic structural view of a backlight module according to an embodiment of the present invention.
  • FIG. 2 is a bottom perspective view of the connector of FIG. 1 in a backlight module
  • Figure 3 is an enlarged schematic view of the connector portion of Figure 1.
  • FIG. 1 is a schematic structural view of a backlight module 200 according to an embodiment of the present invention.
  • the backlight module 200 includes a back plate 250 , a light guide plate 210 , a heat sink 230 , a connecting member 240 , a reflective sheet 260 , an optical film 270 , and a light source 220 .
  • the light guide plate 210 is disposed on one side of the back plate 250, and the reflective sheet 260 is disposed between the light guide plate 210 and the back plate 250 by pasting or otherwise.
  • the optical film 270 can also be disposed on the side of the light guide plate 210 remote from the back plate 250 by adhesion or the like.
  • the heat sink 230 includes a horizontal portion 232 and a vertical portion 233 that are connected to each other. Wherein the horizontal portion 232 and the vertical portion 233 are integrally formed, and in the present embodiment, the horizontal portion 232 and the vertical portion 233 are perpendicular to each other at 90 degrees. In other embodiments, the horizontal portion 232 and the vertical portion 233 can be joined at any angle as desired or in an arcuate manner.
  • the horizontal portion 232 is disposed on the other side of the back plate 250 away from the light guide plate 210, and the horizontal portion 232 is provided with a through hole 231.
  • the vertical portion 233 is disposed adjacent to the light incident surface of the light guide plate 210, and the light source 220 is disposed on a side of the vertical portion 233 near the light incident surface.
  • the connecting member 240 connects the heat sink 230 to the backing plate 250 and allows the heat sink 230 to move relative to the backing plate 250 in the spacing direction of the light guiding plate 210 and the light source 220.
  • the connecting member 240 includes a first connecting portion 241, a second connecting portion 242, and a third connecting portion 243.
  • the first connecting portion 241 is fixed to the back plate 250.
  • the second connecting portion 242 is connected to the first connecting portion 241 and penetrates through the through hole 231 .
  • the third connecting portion 243 is connected to the second connecting portion 242 and supported on a side of the horizontal portion 232 remote from the backing plate 250.
  • the first connecting portion 241, the second connecting portion 242, and the third connecting portion 243 are three cylindrical bodies disposed coaxially.
  • the back plate 250 is provided with a convex hull 251 that protrudes toward the horizontal portion 232.
  • the connecting member 240 is a screw
  • the convex bag 251 is provided with a threaded hole 252
  • the first connecting portion 241 of the connecting member 240 is fixed in the threaded hole 252 by screwing.
  • the horizontal portion 232 is provided with a recess 234 for receiving the convex hull 251.
  • the size of the recess 234 in the spacing direction thereof is larger than the dimension of the convex hull 251 in the spacing direction thereof.
  • FIG. 2 is a bottom perspective view of the connector 240 of FIG. 1 in the backlight module 200.
  • the dimension L of the through hole 231 in the spacing direction is larger than the dimension W of the through hole 231 in the vertical direction of the parallel backing plate 250 in the spacing direction. That is, the length L of the through hole 231 is larger than the width W of the through hole 231.
  • the dimension W of the through hole 231 in the vertical direction of the parallel back plate 250 in the spacing direction thereof is larger than the dimension D2 of the second connecting portion 242 in the vertical direction. That is, the width W of the through hole 231 is larger than the diameter D2 of the second connecting portion 242.
  • the dimension W of the through hole 231 in the vertical direction of the parallel back plate 250 in the spacing direction is smaller than the dimension D1 of the third connecting portion 243 in the vertical direction. Since the third connecting portion 243 is a cylinder, the dimension D1 of the third connecting portion 243 in the vertical direction is the diameter D1 of the third connecting portion 243.
  • the width W of the through hole 231 is smaller than the diameter D1 of the third connecting portion 243.
  • This design enables the third connecting portion 243 to catch the heat sink 230, stabilizing the heat sink 230 in its spacing direction and not moving outward.
  • the length L of the through hole 231 may be larger than the diameter D1 of the third connecting portion 243 or smaller than the diameter D1 of the third connecting portion 243.
  • FIG. 1 and FIG. 3 is an enlarged schematic view of a portion of the connector 240 of FIG.
  • the first connecting portion 241 is fixed in the threaded hole 252 by a screw lock, and the diameter M of the first connecting portion 241 is slightly equal to the diameter (not labeled) of the threaded hole 252. Since the heat sink 230 is movable, the dimension L of the through hole 231 of the heat sink 230 in the spacing direction thereof is greater than the dimension D2 of the second connecting portion 242 in the spacing direction thereof, that is, the length L of the through hole 231 is greater than The diameter D2 of the two connecting portions 242.
  • the heat sink 230 can have sufficient space to move when the light guide plate 210 expands due to heat or moisture absorption. Since the second connecting portion 242 passes through the through hole 231, the thickness T of the second connecting portion 242 is greater than or slightly larger than the thickness t of the through hole 231, so that the heat sink 230 can be conveniently disposed in the through hole 231.
  • the present invention further provides a liquid crystal display including the above backlight module, such as a liquid crystal television or a liquid crystal computer.
  • the liquid crystal display and the backlight module of the present invention can prevent the light source from being squeezed when the light guide plate expands by means of the heat sink capable of moving relative to the back plate in the interval direction of the light guide plate and the light source, and at the same time
  • the horizontal portion is placed on the outside of the back plate away from the light guide plate, so that the heat sink is in direct contact with the outside air, and the heat dissipation of the heat sink is accelerated, thereby effectively reducing the temperature of the light source.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

一种背光模组（200）及液晶显示器。该背光模组（200）包括背板（250）、导光板（210）、散热件（230）、光源（220）以及连接件（240）。导光板（210）设置于背板（250）的一侧上。散热件（230）包括相互连接的水平部（232）和竖直部（233），水平部（232）设置于背板（250）的远离导光板（210）的另一侧上，竖直部（233）与导光板（210）的入光面相邻设置。光源（220）设置于竖直部（233）的靠近入光面的一侧上。连接件（240）将散热件（230）连接于背板（250）上并允许散热件（230）在导光板（210）和光源（220）的间隔方向上相对背板（250）移动。通过上述方式，该背光模组（200）及液晶显示器能够有效避免导光板（210）挤压光源（220）且有效降低光源（220）的温度。

Description

一种背光模组及液晶显示器
【技术领域】
本发明涉及显示技术领域，特别是涉及一种背光模组及液晶显示器。
【背景技术】
由于液晶显示器的工作电压低、辐射低和功耗小等优点，液晶显示器广泛应用于各种领域，包括计算机、手机、电视以及测量显示等领域。其中，液晶显示器包括液晶显示面板以及背光模组等，液晶显示面板本身不会发光，需要该背光模组为其提供背光进行显示。在现有技术的背光模组中，导光板由于受热或吸湿会产生膨胀，导光板膨胀时将会挤压光源，导致光源受压变形，从而使得光源内部电路异常，容易使光源损坏。另外，由于光源发光会产生高温，会使光源表面温度非常高，有时可以高达80度。而光源的框架及灌封胶处于非刚性状态，导光板受热膨胀将强行压迫光源变形，导光板与光源的芯片距离会变得比较接近，进而会使导光板承受光源的表面高温。而导光板的玻璃化温度一般小于90度，当显示模组放置在环境温度为40度时，导光板承受光源表面温度将超过90度，这样会超过导光板的玻璃化温度，此时导光板会软化，破坏导光板的全反射角。
因此，有必要提供一种背光模组和液晶显示器，以解决上述问题。
【发明内容】
本发明主要解决的技术问题是提供一种背光模组及液晶显示器，以有效避免导光板挤压光源且有效降低光源的温度。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种背光模组，该背光模组包括：背板；导光板，所述导光板设置于所述背板的一侧上；散热件，所述散热件包括相互连接的水平部和竖直部，所述水平部设置于所述背板的远离所述导光板的另一侧上，所述竖直部与所述导光板的入光面相邻设置；光源，所述光源设置于所述竖直部的靠近所述入光面的一侧上；连接件，所述连接件将所述散热件连接于所述背板上并允许所述散热件在所述导光板和所述光源的间隔方向上相对所述背板移动；所述水平部上设置有通孔，所述连接件包括固定于所述背板上的第一连接部、与所述第一连接部连接且穿设于所述通孔内的第二连接部以及与所述第二连接部连接且支撑于所述水平部的远离所述背板的一侧上的第三连接部，所述通孔在所述间隔方向上的尺寸大于所述第二连接部在所述间隔方向上的尺寸；所述通孔在所述间隔方向上的尺寸大于所述通孔在所述间隔方向的平行所述背板的垂直方向上的尺寸；所述通孔在所述间隔方向的平行所述背板的垂直方向上的尺寸大于所述第二连接部在所述垂直方向上的尺寸且小于所述第三连接部在所述垂直方向上的尺寸。
其中，第一连接部、所述第二连接部以及所述第三连接部为同轴设置的三个圆柱体。
其中，连接件为螺丝，所述背板上设置有螺纹孔，所述连接件的所述第一连接部通过螺丝锁附方式固定于所述螺纹孔内。
其中，背板上进一步设置有朝向所述水平部突出的凸包，所述螺纹孔设置于所述凸包上，所述水平部上设置有用于***述凸包的凹陷，所述凹陷在所述间隔方向上的尺寸大于所述凸包在所述间隔方向上的尺寸。
其中，水平部和所述竖直部一体成型。
其中，背光模组进一步包括设置于所述导光板与所述背板之间的反射片以及设置于所述导光板的远离所述背板一侧的光学膜片。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种背光模组，该背光模组包括背板、导光板、散热件、光源以及连接件。导光板设置于背板的一侧上。散热件包括相互连接的水平部和竖直部，水平部设置于背板的远离导光板的另一侧上，竖直部与导光板的入光面相邻设置。光源设置于竖直部的靠近入光面的一侧上。连接件将散热件连接于背板上并允许散热件在导光板和光源的间隔方向上相对所述背板移动。
其中，水平部上设置有通孔，连接件包括固定于背板上的第一连接部、与第一连接部连接且穿设于通孔内的第二连接部以及与第二连接部连接且支撑于水平部的远离背板的一侧上的第三连接部，通孔在间隔方向上的尺寸大于第二连接部在间隔方向上的尺寸。
其中，通孔在间隔方向上的尺寸大于通孔在间隔方向的平行背板的垂直方向上的尺寸。
其中，通孔在间隔方向的平行背板的垂直方向上的尺寸大于第二连接部在垂直方向上的尺寸且小于第三连接部在垂直方向上的尺寸。
其中，第一连接部、第二连接部以及第三连接部为同轴设置的三个圆柱体。
其中，连接件为螺丝，背板上设置有螺纹孔，连接件的第一连接部通过螺丝锁附方式固定于螺纹孔内。
其中，背板上进一步设置有朝向水平部突出的凸包，螺纹孔设置于凸包上，水平部上设置有用于收容凸包的凹陷，凹陷在间隔方向上的尺寸大于凸包在间隔方向上的尺寸。
其中，水平部和竖直部一体成型。
其中，背光模组进一步包括设置于导光板与背板之间的反射片以及设置于导光板的远离背板一侧的光学膜片。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种液晶显示器，该液晶显示器包括背光模组，该背光模组包括：背板；导光板，导光板设置于背板的一侧上；散热件，散热件包括相互连接的水平部和竖直部，水平部设置于背板的远离导光板的另一侧上，竖直部与导光板的入光面相邻设置；光源，光源设置于竖直部的靠近入光面的一侧上；连接件，连接件将散热件连接于背板上并允许散热件在导光板和光源的间隔方向上相对背板移动。
其中，水平部上设置有通孔，连接件包括固定于背板上的第一连接部、与所述第一连接部连接且穿设于通孔内的第二连接部以及与第二连接部连接且支撑于水平部的远离背板的一侧上的第三连接部，通孔在间隔方向上的尺寸大于第二连接部在间隔方向上的尺寸。
其中，通孔在间隔方向上的尺寸大于通孔在间隔方向的平行背板的垂直方向上的尺寸。
其中，通孔在间隔方向的平行背板的垂直方向上的尺寸大于第二连接部在垂直方向上的尺寸且小于第三连接部在垂直方向上的尺寸。
其中，连接件为螺丝，背板上设置有螺纹孔，连接件的第一连接部通过螺丝锁附方式固定于螺纹孔内；背板上进一步设置有朝向水平部突出的凸包，螺纹孔设置于所述凸包上，水平部上设置有用于收容凸包的凹陷，凹陷在间隔方向上的尺寸大于凸包在间隔方向上的尺寸。
本发明的有益效果是：区别于现有技术的情况，本发明通过散热件能够在导光板和光源的间隔方向上相对背板移动，进而避免导光板膨胀挤压光源，同时通过将散热件的水平部放置于背板远离导光板的外部，使得散热件和外界空气直接接触，加快散热件的散热，有效降低光源的温度。
【附图说明】
图1是本发明实施例的背光模组结构示意图；
图2是图1中的连接件在背光模组的仰视透视示意图；
图3是图1中的连接件部分的放大示意图。
【具体实施方式】
下面结合附图和实施方式对本发明进行详细说明。
图1是本发明实施例的背光模组200结构示意图。如图1所示，该背光模组200包括：背板250、导光板210、散热件230、连接件240、反射片260、光学膜片270和光源220。
导光板210设置于背板250的一侧上，而反射片260通过黏贴或者其他方式设置在导光板210和背板250之间。光学膜片270也可通过黏贴或者其他方式设置在导光板210的远离背板250的一侧。
散热件230包括相互连接的水平部232和竖直部233。其中水平部232和竖直部233一体成型，并且在本实施例中，水平部232和竖直部233互相垂直成90度。在其他实施例中，水平部232和竖直部233可根据需要而成任意角度，或为弧形方式连接。水平部232设置于背板250的远离导光板210的另一侧上，且水平部232上设置有通孔231。竖直部233与导光板210的入光面相邻设置，而光源220设置于竖直部233的靠近入光面的一侧上。
连接件240将散热件230连接于背板250上，并允许散热件230在导光板210和光源220的间隔方向上相对背板250移动。连接件240包括第一连接部241、第二连接部242以及第三连接部243。第一连接部241固定于背板250上。第二连接部242与第一连接部241连接，且穿设于通孔231内。第三连接部243与第二连接部242连接，且支撑于水平部232的远离背板250的一侧上。其中第一连接部241、第二连接部242以及第三连接部243为同轴设置的三个圆柱体。
背板250设置有朝向水平部232突出的凸包251。在本实施例中，连接件240为螺丝，凸包251上设置有螺纹孔252，连接件240的第一连接部241通过螺丝锁附方式固定于螺纹孔252内。水平部232上设置有用于收容凸包251的凹陷234，为了使凹陷234能够收容凸包251，其中凹陷234在其间隔方向上的尺寸大于凸包251在其间隔方向上的尺寸。
为了连接件240能够将背板250和散热件230准确固定于背光模组200中，连接件240的尺寸参数需要一定的限制。图2是图1中的连接件240在背光模组200的仰视透视示意图。请参照图2和图1，通孔231在间隔方向上的尺寸L大于通孔231在间隔方向的平行背板250的垂直方向上的尺寸W。也就是说，通孔231的长度L大于通孔231的宽度W。由于第二连接部242是穿设在通孔231内，则通孔231在其间隔方向的平行背板250的垂直方向上的尺寸W大于第二连接部242在垂直方向上的尺寸D2。也就是说通孔231的宽度W大于第二连接部242的直径D2。通孔231在间隔方向的平行背板250的垂直方向上的尺寸W小于第三连接部243在垂直方向上的尺寸D1。由于第三连接部243为圆柱体，所以第三连接部243的垂直方向的尺寸D1为第三连接部243的直径D1。也就是说，通孔231的宽度W小于第三连接部243的直径D1。此种设计使第三连接部243能够卡住散热件230，使散热件230稳定在其间隔方向上且不向外移动。而对于通孔231的长度L和第三连接部243的直径D1大小关系，通孔231的长度L既可以大于第三连接部243的直径D1，也可以小于第三连接部243的直径D1。
为了更清楚的了解背光模组200与各部件之间的尺寸参数，请参照图1与图3，图3是图1中的连接件240部分的放大示意图。第一连接部241通过螺丝锁附固定在螺纹孔252内，第一连接部241的直径M略等于螺纹孔252的直径（未标示）。由于散热件230是可活动的，所以散热件230的通孔231在其间隔方向上的尺寸L大于第二连接部242在其间隔方向上的尺寸D2，也就是通孔231的长度L大于第二连接部242的直径D2。这样散热件230才可以在导光板210由于受热或吸湿而产生膨胀时有足够的空间移动。由于第二连接部242是穿过通孔231内的，则第二连接部242的厚度T大于或者略大于通孔231的厚度t，这样才可以方便散热件230设置在通孔231内。
本发明进一步提供了包括上述背光模组的液晶显示器，例如液晶电视或液晶电脑等。
综上所述，本发明的液晶显示器及背光模组通过散热件能够在导光板和光源的间隔方向上相对背板移动的方式，避免了导光板膨胀时挤压光源，同时通过将散热件的水平部放置于背板远离导光板的外部，使得散热件和外界空气直接接触，加快散热件的散热，有效降低光源的温度。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (20)

  1. 一种背光模组，其中，所述背光模组包括：
    背板；
    导光板，所述导光板设置于所述背板的一侧上；
    散热件，所述散热件包括相互连接的水平部和竖直部，所述水平部设置于所述背板的远离所述导光板的另一侧上，所述竖直部与所述导光板的入光面相邻设置；
    光源，所述光源设置于所述竖直部的靠近所述入光面的一侧上；
    连接件，所述连接件将所述散热件连接于所述背板上并允许所述散热件在所述导光板和所述光源的间隔方向上相对所述背板移动；所述水平部上设置有通孔，所述连接件包括固定于所述背板上的第一连接部、与所述第一连接部连接且穿设于所述通孔内的第二连接部以及与所述第二连接部连接且支撑于所述水平部的远离所述背板的一侧上的第三连接部，所述通孔在所述间隔方向上的尺寸大于所述第二连接部在所述间隔方向上的尺寸；所述通孔在所述间隔方向上的尺寸大于所述通孔在所述间隔方向的平行所述背板的垂直方向上的尺寸；所述通孔在所述间隔方向的平行所述背板的垂直方向上的尺寸大于所述第二连接部在所述垂直方向上的尺寸且小于所述第三连接部在所述垂直方向上的尺寸。
  2. 根据权利要求1所述的背光模组，其中，所述第一连接部、所述第二连接部以及所述第三连接部为同轴设置的三个圆柱体。
  3. 根据权利要求1所述的背光模组，其中，所述连接件为螺丝，所述背板上设置有螺纹孔，所述连接件的所述第一连接部通过螺丝锁附方式固定于所述螺纹孔内。
  4. 根据权利要求3所述的背光模组，其中，所述背板上进一步设置有朝向所述水平部突出的凸包，所述螺纹孔设置于所述凸包上，所述水平部上设置有用于***述凸包的凹陷，所述凹陷在所述间隔方向上的尺寸大于所述凸包在所述间隔方向上的尺寸。
  5. 根据权利要求1所述的背光模组，其中，所述水平部和所述竖直部一体成型。
  6. 根据权利要求1所述的背光模组，其中，所述背光模组进一步包括设置于所述导光板与所述背板之间的反射片以及设置于所述导光板的远离所述背板一侧的光学膜片。
  7. 一种背光模组，其中，所述背光模组包括：
    背板；
    导光板，所述导光板设置于所述背板的一侧上；
    散热件，所述散热件包括相互连接的水平部和竖直部，所述水平部设置于所述背板的远离所述导光板的另一侧上，所述竖直部与所述导光板的入光面相邻设置；
    光源，所述光源设置于所述竖直部的靠近所述入光面的一侧上；
    连接件，所述连接件将所述散热件连接于所述背板上并允许所述散热件在所述导光板和所述光源的间隔方向上相对所述背板移动。
  8. 根据权利要求7所述的背光模组，其中，所述水平部上设置有通孔，所述连接件包括固定于所述背板上的第一连接部、与所述第一连接部连接且穿设于所述通孔内的第二连接部以及与所述第二连接部连接且支撑于所述水平部的远离所述背板的一侧上的第三连接部，所述通孔在所述间隔方向上的尺寸大于所述第二连接部在所述间隔方向上的尺寸。
  9. 根据权利要求8所述的背光模组，其中，所述通孔在所述间隔方向上的尺寸大于所述通孔在所述间隔方向的平行所述背板的垂直方向上的尺寸。
  10. 根据权利要求8所述的背光模组，其中，所述通孔在所述间隔方向的平行所述背板的垂直方向上的尺寸大于所述第二连接部在所述垂直方向上的尺寸且小于所述第三连接部在所述垂直方向上的尺寸。
  11. 根据权利要求8所述的背光模组，其中，所述第一连接部、所述第二连接部以及所述第三连接部为同轴设置的三个圆柱体。
  12. 根据权利要求8所述的背光模组，其中，所述连接件为螺丝，所述背板上设置有螺纹孔，所述连接件的所述第一连接部通过螺丝锁附方式固定于所述螺纹孔内。
  13. 根据权利要求12所述的背光模组，其中，所述背板上进一步设置有朝向所述水平部突出的凸包，所述螺纹孔设置于所述凸包上，所述水平部上设置有用于***述凸包的凹陷，所述凹陷在所述间隔方向上的尺寸大于所述凸包在所述间隔方向上的尺寸。
  14. 根据权利要求7所述的背光模组，其中，所述水平部和所述竖直部一体成型。
  15. 根据权利要求7所述的背光模组，其中，所述背光模组进一步包括设置于所述导光板与所述背板之间的反射片以及设置于所述导光板的远离所述背板一侧的光学膜片。
  16. 一种液晶显示器，其中，所述液晶显示器包括背光模组，所述背光模组包括：背板；导光板，所述导光板设置于所述背板的一侧上；散热件，所述散热件包括相互连接的水平部和竖直部，所述水平部设置于所述背板的远离所述导光板的另一侧上，所述竖直部与所述导光板的入光面相邻设置；光源，所述光源设置于所述竖直部的靠近所述入光面的一侧上；连接件，所述连接件将所述散热件连接于所述背板上并允许所述散热件在所述导光板和所述光源的间隔方向上相对所述背板移动。
  17. 根据权利要求16所述的背光模组，其中，所述水平部上设置有通孔，所述连接件包括固定于所述背板上的第一连接部、与所述第一连接部连接且穿设于所述通孔内的第二连接部以及与所述第二连接部连接且支撑于所述水平部的远离所述背板的一侧上的第三连接部，所述通孔在所述间隔方向上的尺寸大于所述第二连接部在所述间隔方向上的尺寸。
  18. 根据权利要求17所述的背光模组，其中，所述通孔在所述间隔方向上的尺寸大于所述通孔在所述间隔方向的平行所述背板的垂直方向上的尺寸。
  19. 根据权利要求17所述的背光模组，其中，所述通孔在所述间隔方向的平行所述背板的垂直方向上的尺寸大于所述第二连接部在所述垂直方向上的尺寸且小于所述第三连接部在所述垂直方向上的尺寸。
  20. 根据权利要求17所述的背光模组，其中，所述连接件为螺丝，所述背板上设置有螺纹孔，所述连接件的所述第一连接部通过螺丝锁附方式固定于所述螺纹孔内；所述背板上进一步设置有朝向所述水平部突出的凸包，所述螺纹孔设置于所述凸包上，所述水平部上设置有用于***述凸包的凹陷，所述凹陷在所述间隔方向上的尺寸大于所述凸包在所述间隔方向上的尺寸。
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