WO2014134841A1 - 背光模组及液晶显示器 - Google Patents

背光模组及液晶显示器 Download PDF

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Publication number
WO2014134841A1
WO2014134841A1 PCT/CN2013/072639 CN2013072639W WO2014134841A1 WO 2014134841 A1 WO2014134841 A1 WO 2014134841A1 CN 2013072639 W CN2013072639 W CN 2013072639W WO 2014134841 A1 WO2014134841 A1 WO 2014134841A1
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WIPO (PCT)
Prior art keywords
light guide
guide plate
backlight module
light
plate
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Ceased
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PCT/CN2013/072639
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English (en)
French (fr)
Inventor
李全
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Publication of WO2014134841A1 publication Critical patent/WO2014134841A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0085—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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • 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

Definitions

  • the present invention relates to the field of liquid crystal display technology, and more particularly to a backlight module and a liquid crystal display using the same.
  • the backlight module is an important component of the light source provided in the liquid crystal display, and is mainly composed of an LED lamp and a light guide plate for conducting light emitted from the LED lamp to a specified position.
  • the distance from the light emitting surface of the LED lamp to the light incident surface of the light guide plate is referred to as the coupling distance.
  • One problem that most backlight modules usually have is that during the use of the backlight module, the light guide plate may be swollen and deformed due to high temperature, so that the light-coupled distance between the light-incident surface of the light guide plate and the light-emitting surface of the LED light is Changes occur, which can seriously affect the light entering efficiency of the light source.
  • the light guide plate When the coupling distance is too small, the light guide plate is also likely to collide with the LED lamp during transportation to cause damage.
  • the coupling distance becomes zero that is, when the light incident surface of the light guide plate is in direct contact with the LED lamp, the light guide plate may also cause the LED lamp to be squeezed, resulting in serious damage of the LED lamp.
  • the technical problem to be solved by the present invention is to provide a defect that the coupling distance between the LED lamp and the light guide plate in the prior art is difficult to ensure during use, and provide an LED lamp and a light guide plate during use.
  • the invention constructs a
  • the backlight module includes a back plate, a heat sink, an LED light bar, a light guide plate, and an optical film;
  • the heat sink includes a bottom plate mounted on the back plate, and a side plate perpendicular to the bottom plate;
  • An LED light bar is disposed on an inner side surface of the side plate, and the LED light bar includes a substrate, and a plurality of LED lights disposed on the substrate;
  • the light guide plate is mounted on a top of the bottom plate, and The light incident surface of the light guide plate is opposite to the light emitting surface of the LED lamp;
  • the optical film is mounted on the top of the light guide plate;
  • the backlight module further includes a bracket connected to the side plate; a side of the bracket adjacent to the light guide plate is provided with at least one protrusion for limiting the position of the light guide plate; in a direction perpendicular to the light incident surface of the light guide plate, The limiting portion is located between the LED lamp and the light guide plate.
  • the end of the limiting portion abuts against the light incident surface of the light guide plate.
  • the limiting portion is located between the two LED lamps in a direction parallel to the light incident surface of the light guide plate.
  • the bracket In the present invention, the bracket includes a bracket body and a connecting portion disposed on the bracket body; the bracket is connected to the side panel through the connecting portion.
  • the connecting portion is provided with a card slot; and the side plate is provided with a buckle for snap-fitting with the card slot.
  • the backlight module further includes a connecting member; the connecting member is connected to the side plate through the connecting portion.
  • the backlight module further includes a double-sided tape; one side of the double-sided tape is bonded to the connecting portion, and the other side is bonded to the side plate.
  • a thermal conductive paste is disposed between the substrate and the side plate.
  • the substrate is disposed on the side plate by a screw connection.
  • the invention also constructs a a liquid crystal display including a display panel and a backlight module;
  • the backlight module includes a back plate, a heat sink, an LED light bar, a light guide plate, and an optical film; the light guide plate, the optical film, and the The display panel is sequentially placed in parallel;
  • the heat sink includes a bottom plate mounted on the back plate, and a side plate perpendicular to the bottom plate;
  • the LED light bar is disposed on an inner side surface of the side plate, and the
  • the LED strip includes a substrate and a plurality of LED lamps disposed on the substrate;
  • the light guide plate is mounted on a top of the bottom plate, and a light incident surface of the light guide plate is opposite to a light emitting surface of the LED lamp
  • the backlight module further includes a bracket connected to the side panel; at least one side of the bracket adjacent to the light guide plate is provided with a protrusion for limiting the position of the light guide plate a position portion; the limiting portion is located between the
  • the end of the limiting portion abuts against the light incident surface of the light guide plate.
  • the limiting portion is located between the two LED lamps in a direction parallel to the light incident surface of the light guide plate.
  • the bracket includes a bracket body and a connecting portion disposed on the bracket body; the bracket is coupled to the side panel by the connecting portion.
  • the A card slot is disposed on the connecting portion; and the side plate is provided with a buckle for fastening and connecting with the card slot.
  • the backlight module further includes a connecting member; the connecting member is connected to the side plate through the connecting portion.
  • the backlight module further includes a connecting member; the connecting member is connected to the side plate through the connecting portion.
  • a thermal conductive paste is disposed between the substrate and the side plate.
  • the substrate is disposed on the side plate by screwing.
  • the backlight module and the liquid crystal display have the following beneficial effects: the backlight module adopts a structure of a bracket, which can ensure a certain coupling distance between the light guide plate and the LED lamp to improve the coupling efficiency, thereby improving the display quality; Can prevent it The change in the coupling distance causes the display quality to deteriorate and the LED lamp to be damaged.
  • FIG. 1 is an exploded perspective view of a backlight module according to a first preferred embodiment of the present invention
  • FIG. 2 is a schematic view showing a mounting position of a bracket and an LED light bar in the backlight module shown in FIG. 1;
  • FIG. 3 is a perspective structural view of a bracket in the backlight module shown in FIG. 1;
  • FIG. 4 is a schematic structural view of the backlight module of the backlight module shown in FIG. 1 when the limiting portion of the bracket is in contact with the light incident surface of the light guide plate;
  • FIG. 5 is a schematic structural view showing a connection portion of a bracket in the backlight module shown in FIG. 1 and a heat sink;
  • FIG. 6 is a schematic view showing a connection structure between a connecting portion of a bracket and a heat sink in a backlight module according to a second preferred embodiment of the present invention
  • FIG. 7 is a schematic view showing a connection structure between a connecting portion of a bracket and a heat dissipating member in a backlight module according to a third preferred embodiment of the present invention.
  • a first preferred embodiment of the present invention provides a backlight module including a backplane 1, a heat sink 2, and an LED.
  • the heat sink 2 is substantially an L-shaped structure including a bottom plate 21 and a side plate 22 perpendicular to the bottom plate 21. In this embodiment, the heat sink 2 is acted upon by an existing aluminum extrusion.
  • the backing plate 1 is substantially a plate-like structure located at the bottom of the bottom plate 21 and fixedly coupled to the bottom plate 21.
  • the back plate 1 is a metal plate on which a plurality of fixing holes 11 for fixing the heat sink 2 are disposed.
  • the light bar 3 is substantially a straight strip structure disposed on the inner side surface of the side plate 22, so that the heat generated by the LED light bar 3 can be conducted to the heat sink 2 for heat dissipation in time.
  • the LED light bar 3 includes a substrate 31 and an LED lamp 32, as shown in FIG. A plurality of LED lamps 32 are uniformly disposed on the substrate 31.
  • the substrate 31 is disposed on the side plate 22 by screwing.
  • a thermal paste 10 is disposed between the substrate 31 and the side plate 22.
  • Thermal paste 10 As a medium for transferring heat, it has excellent electrical insulation and thermal conductivity, as well as high and low temperature resistance.
  • the light guide plate 4 is mounted on the top of the bottom plate 21, and the light incident surface of the light guide plate 4 is opposed to the light emitting surface of the LED lamp 32.
  • the reflection sheet 6 is located between the light guide plate 4 and the bottom plate 21.
  • the optical film 7 is mounted on the top of the light guide plate 4.
  • the bracket 5 is substantially an elongated structure including a bracket body 51, a connecting portion 52, and a limiting portion 53, as shown in FIG.
  • the bracket main body 51, the connecting portion 52, and the limiting portion 53 may be integrally formed.
  • the bracket 5 is preferably metal sheet metal to ensure sufficient rigidity. It can be understood that the bracket 5 can also be made of a plastic material having a certain rigidity.
  • the bracket body 51 is located at the top of the side panel 22 and the LED light bar 3.
  • the connecting portion 52 is provided on the bracket main body 51. In this embodiment, the bracket body 51 is provided with two connecting portions 52. It can be understood that the number of the connecting portions 52 can also have other options.
  • the connecting portion 52 is disposed perpendicular to the bracket main body 51, and the connecting portion 52 is connected to the outer side of the side plate 22 in the heat sink 2.
  • the connecting portion 52 is provided with a card slot 54
  • the side plate 22 is provided with a buckle 21 at a position corresponding to the card slot 54, as shown in FIG.
  • the buckle 21 and the card slot 54 are fastened to each other, so that the bracket 5 is connected to the heat sink 2.
  • the limiting portion 53 is disposed on the side of the bracket body 51 adjacent to the light guide plate 4 in a convex shape for limiting the position of the light guide plate 4.
  • the limiting portion 53 is provided at least one. In order not to affect the normal operation of the LED lamp 32, as shown in FIG. 2, in this embodiment, the limiting portion 53 is disposed in the middle of the two LED lamps 32 in a direction parallel to the light incident surface of the light guide plate 4. .
  • Three brackets 53 are disposed on the bracket body 51, and each of the limiting portions 53 is disposed between the two LED lamps 32. It can be understood that the number of the limiting portions 53 can also have other options.
  • the stopper portion 53 is located between the LED lamp 32 and the light guide plate 4 in a direction perpendicular to the light incident surface of the light guide plate 4.
  • the end of the limiting portion 53 can abut against the light incident surface of the light guide plate 4, as shown in FIG.
  • the light guide plate 4 may undergo expansion deformation due to temperature changes or the like during use, so that the light guide plate 4 is directed to the LED.
  • the lamp 32 is close to one side. Since the bracket 5 has a certain rigidity, the limiting portion 53 is disposed between the LED lamp 32 and the light guide plate 4 to block the light guide plate 4 to the LED.
  • the lamp 32 is inflated on one side to keep the distance between the light guide plate 4 and the LED lamp 32 constant.
  • the light guide plate 4 is kept in contact with the limiting portion 53.
  • the coupling distance is consistent, that is, the coupling distance is The distance between the light emitting surface of the LED lamp 32 and the contact surface between the light guide plate 4 and the stopper portion 53.
  • the coupling distance between the LED lamp 32 and the light guide plate 4 is kept constant, and a high incident rate can be ensured.
  • the bracket 5 is placed between the LED lamp 32 and the light guide plate 4 to prevent the disappearance of the coupling distance and cause a decrease in the display quality of the backlight module.
  • a backlight module provided by the second preferred embodiment of the present invention is different from the backlight module of the first embodiment in that The connection between the connecting portion 52 and the side plate 22.
  • the backlight module further includes a connecting member 8, and the connecting member 8 can be configured by a screw member, a pin, or the like.
  • the connecting member 8 is connected to the side plate 22 through the connecting portion 52, so that the bracket 5 is attached to the heat sink 2. With the structure of the connecting member 8, the bracket 5 can be detachably attached to the heat sink 2.
  • a backlight module provided by the third preferred embodiment of the present invention is different from the backlight module of the first embodiment and the second embodiment in that The connection between the connecting portion 52 and the side plate 22.
  • the backlight module further includes a double-sided tape 9.
  • One side of the double-sided tape 9 is bonded to the connecting portion 52, and the other side is bonded to the side plate 22.
  • the double-sided tape 9 can be made of foam double-sided tape, mesh double-sided tape, etc., and has excellent characteristics such as strong adhesion and strong temperature resistance.
  • the bonding method of the double-sided tape 9 can make the connection between the bracket 5 and the heat sink 2 stable and reliable.
  • the present invention also provides a liquid crystal display including a display panel (not shown), and The backlight module of any of the above embodiments.
  • the light guide plate 4, the optical film 7, and the display panel are sequentially placed in parallel.
  • the backlight module adopts a structure of a bracket, which can ensure a certain coupling distance between the light guide plate and the LED lamp to improve the coupling efficiency, thereby improving the display quality; and further preventing the change of the coupling distance Causes deterioration of display quality and damage to LED lights.

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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)
  • Liquid Crystal (AREA)

Abstract

一种背光模组及液晶显示器，背光模组包括背板（1）、散热件（2）、LED灯条（3）、导光板（4）、光学膜片（7）、以及支架（5）。散热件（2）包括安装在背板（1）上的底板（21）、以及与底板（21）垂直的侧板（22），支架（5）与侧板（22）连接。LED灯条（3）包括基板（31）、以及LED灯（32）。导光板（4）的入光面与LED灯（32）的发光面相对。支架（5）上靠近导光板（4）的一侧至少设置有一个凸起的、用于限制导光板（4）的位置的限位部（53），在与导光板（4）的入光面垂直的方向上，限位部（53）位于LED灯（32）与导光板（4）之间。本背光模组采用支架（5）的结构，可以保证导光板（4）与LED灯（3）之间隔开一定的耦光距离，以提高耦光效率，从而达到提升显示品质的作用，可以防止耦光距离的变化造成显示品质降低及损坏LED灯的现象。

Description

背光模组及液晶显示器 技术领域
本发明涉及液晶显示技术领域，更具体地说，涉及一种背光模组及使用该背光模组的液晶显示器。
背景技术
背光模组是液晶显示器中提供光源的重要组成部分，其主要由LED灯以及用于将LED灯发出的光线传导至指定位置的导光板组成。背光模组中 LED灯的发光面到导光板的入光面的距离称之为耦光距离。大多数背光模组通常存在的一个问题是，背光模组在使用过程中，导光板可能会由于高温而产生膨胀变形，使得导光板的入光面和LED灯的发光面之间的耦光距离发生变化，这会严重影响光源的入光效率。当耦光距离过小时，在运输过程中导光板也容易与LED灯产生碰撞而造成损坏。当耦光距离变为零，即导光板的入光面与LED灯直接接触时，导光板还有可能对LED灯造成挤压，导致LED灯严重损坏。
发明内容
本发明要解决的技术问题在于，针对现有技术的上述LED灯与导光板之间的耦光距离在使用过程中难以保证的缺陷，提供一种在使用过程中能够保证LED灯与导光板之间的耦光距离的背光模组与液晶显示器。
本发明解决其技术问题所采用的技术方案是：
本发明构造了一种 背光模组，包括背板、散热件、LED灯条、导光板、以及光学膜片；所述散热件包括安装在所述背板上的底板、以及与所述底板垂直的侧板；所述LED灯条设置在所述侧板的内侧表面上，且所述LED灯条包括基板、以及若干个设置在所述基板上的LED灯；所述导光板装设于所述底板的顶部，且所述导光板的入光面与所述LED灯的发光面相对；所述光学膜片装设于所述导光板的顶部；所述背光模组还包括与所述侧板连接的支架；所述支架上靠近所述导光板的一侧至少设置有一个凸起的，用于限制所述导光板的位置的限位部；在与所述导光板的入光面垂直的方向上，所述限位部位于所述LED灯与所述导光板之间。
在本发明所述的 背光模组中，所述 限位部的末端与所述导光板的入光面相抵持。
在本发明所述的 背光模组中，在与所述导光板的入光面平行的方向上，所述限位部还位于两个所述LED灯之间。
在本发明所述的 背光模组中，所述支架包括支架主体、以及设置在所述支架主体上的连接部；所述支架通过所述连接部连接在所述侧板上。
在本发明所述的 背光模组中，所述连接部上设置有卡槽；所述侧板上设置有用于与所述卡槽相互扣合连接的卡扣。
在本发明所述的 背光模组中，所述背光模组还包括连接件；所述连接件穿过所述连接部与所述侧板连接。
在本发明所述的 背光模组中，所述背光模组还包括双面胶；所述双面胶的一侧与所述连接部粘接，另一侧与所述侧板粘接。
在本发明所述的 背光模组中，所述基板与所述侧板之间设置有导热膏。
在本发明所述的 背光模组中，所述基板通过螺纹连接的方式设置在所述侧板上。
本发明还构造了一种 液晶显示器，包括显示面板、以及背光模组；所述背光模组包括背板、散热件、LED灯条、导光板、以及光学膜片；所述导光板、所述光学膜片、以及所述显示面板依次平行放置；所述散热件包括安装在所述背板上的底板、以及与所述底板垂直的侧板；所述LED灯条设置在所述侧板的内侧表面上，且所述LED灯条包括基板、以及若干个设置在所述基板上的LED灯；所述导光板装设于所述底板的顶部，且所述导光板的入光面与所述LED灯的发光面相对；其中：所述背光模组还包括与所述侧板连接的支架；所述支架上靠近所述导光板的一侧至少设置有一个凸起的，用于限制所述导光板的位置的限位部；在与所述导光板的入光面垂直的方向上，所述限位部位于所述LED灯与所述导光板之间。
在本发明所述的 液晶显示器中， 所述 限位部的末端与所述导光板的入光面相抵持。
在本发明所述的 液晶显示器中， 在与所述导光板的入光面平行的方向上，所述限位部位于两个所述LED灯之间。
在本发明所述的 液晶显示器中， 所述支架包括支架主体、以及设置在所述支架主体上的连接部；所述支架通过所述连接部连接在所述侧板上。
在本发明所述的 液晶显示器中， 所述 连接部上设置有卡槽；所述侧板上设置有用于与所述卡槽相互扣合连接的卡扣。
在本发明所述的 液晶显示器中， 所述 背光模组还包括连接件；所述连接件穿过所述连接部与所述侧板连接。
在本发明所述的 液晶显示器中， 所述 背光模组还包括连接件；所述连接件穿过所述连接部与所述侧板连接。
在本发明所述的 液晶显示器中， 所述 基板与所述侧板之间设置有导热膏。
在本发明所述的 液晶显示器中， 所述 基板通过螺纹连接的方式设置在所述侧板上。
实施本发明的 背光模组及液晶显示器，具有以下有益效果：背光模组采用支架的结构，可以保证导光板与LED灯之间隔开一定的耦光距离，以提高耦光效率，从而达到提升显示品质的作用；再者可以防止 耦光距离的变化 造成显示品质降低及损坏LED灯的现象 。
附图说明
下面将结合附图及实施例对本发明作进一步说明，附图中：
图 1 是本发明的第一个较佳实施例提供的背光模组的立体分解图；
图 2 是图1所示的背光模组中支架与LED灯条的安装位置示意图；
图 3 是图1所示的背光模组中支架的立体结构示意图；
图4是图1所示的背光模组中支架的限位部与导光板的入光面 相抵持 时的结构示意图；
图5是图1所示的背光模组中支架的连接部与散热件连接的结构示意图；
图6是本发明的第二个较佳实施例提供的背光模组中支架的连接部与散热件连接结构示意图；
图7是本发明的第三个较佳实施例提供的背光模组中支架的连接部与散热件连接结构示意图。
具体实施方式
为了对本发明的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本发明的具体实施方式。
如图1所示，本发明的第一个较佳实施例 提供一种背光模组，其包括背板1、散热件2、 LED 灯条3、导光板4、支架5、反射片6、以及光学膜片7。
散热件2大致为L形结构，其包括底板21、以及与底板21垂直的侧板22。该实施例中，该散热件2由现有的铝挤充当。背板1大致为板状结构，其位于底板21的底部并与底板21固定连接。较佳地，背板1为一金属板，其上设置有若干个用于固定散热件2的固定孔11。
LED 灯条3大致为直条形结构，其设置在侧板22的内侧表面上，可以将LED灯条3产生的热量及时传导至用于散热的散热件2上。该LED灯条3包括基板31、以及LED灯32，请参阅图2所示。基板31上均匀地设置有若干个LED灯32。该实施例中，基板31通过螺纹连接的方式设置在侧板22上。为增加LED灯条3与散热件2之间的导热性能，基板31与侧板22之间设置有导热膏10。导热膏10 作为传递热量的媒介，其具有优良的电绝缘性和导热性、以及耐高低温等性能。
导光板4装设于底板21的顶部，该导光板4的入光面与LED灯32的发光面相对。反射片6位于导光板4与底板21之间。光学膜片7装设于导光板4的顶部。
支架5大致为长条形结构，其包括支架主体51、连接部52、以及限位部53，请参阅图3所示。支架主体51、连接部52、以及限位部53三者可采用一体成型。支架5优选金属钣金，以保证足够的刚性。可以理解的是，支架5亦可采用具有一定刚性的塑胶材料制成。支架主体51位于侧板22与LED灯条3的顶部。连接部52设置在支架主体51上。该实施例中，支架主体51上设置有两个连接部52，可以理解的是，连接部52的数量亦可以有其他的选择。
连接部52与支架主体51垂直设置，连接部52与散热件2中的侧板22的外侧连接。该实施例中，连接部52上设置有卡槽54，侧板22上与卡槽54相对应的位置设置有卡扣21，请参阅图5所示。卡扣21与卡槽54相互扣合连接，从而使支架5连接在散热件2上。
限位部53呈凸起状设置在支架主体51上靠近导光板4的一侧，用于限制导光板4的位置，该限位部53至少设置有一个。为了不影响LED灯32的正常工作，请参阅图2所示，该实施例中，在与导光板4的入光面平行的方向上，限位部53设置在两个LED灯32的中间位置。支架主体51上设置有三个限位部53，每个限位部53分别设置在两个LED灯32之间。可以理解的是，限位部53的数量亦可以有其他的选择。
在与导光板4的入光面垂直的方向上，限位部53位于LED灯32与导光板4之间。该限位部53的末端可以与导光板4的入光面相抵持，请参阅图4所示。 导光板4在使用过程中有可能会因温度变化等产生膨胀变形，使得导光板4向 LED 灯32一侧靠拢。由于支架5具有一定的刚性，限位部53设置在LED灯32与导光板4之间可以阻挡 导光板4向 LED 灯32一侧膨胀，保持导光板4与LED灯32之间相隔的距离不变。所述背光模组在使用过程中， 导光板4与 限位部53保持接触，此时 耦光距离保持一致，即耦光距离为 LED 灯32的发光面与 导光板4和 限位部53之间的接触面之间的距离。在使用过程中，LED灯32与导光板4之间的 耦光距离保持一致，能够保证高入射率。再者， 支架5放置在LED灯32与导光板4之间，可以防止 耦光距离的消失 而造成所述背光模组的显示品质降低的现象。
本发明的第二个较佳实施例 提供的一种背光模组与第一个实施例中的背光模组的不同之处在于 连接部52与侧板22之间的连接方式。 请参阅图6所示， 该实施例中， 所述 背光模组还包括连接件8， 该 连接件8可以采用螺纹件、销轴等结构 。 连接件8穿过连接部52与侧板22连接，从而使支架5连接在散热件2上。采用连接件8的结构，可使支架5可拆卸地连接在散热件2上。
本发明的第三个较佳实施例 提供的一种背光模组与第一个实施例、第二个实施例中的背光模组的不同之处在于 连接部52与侧板22之间的连接方式。 请参阅图7所示， 该实施例中， 所述 背光模组还包括双面胶9 。 双面胶9的一侧与连接部52粘接，另一侧与侧板22粘接。 双面胶9可采用泡棉双面胶、网格双面胶等，其具有粘着力强、耐温性强等优良特性。采用双面胶9的粘接方式，可使且支架5与散热件2的连接稳定可靠。
基于上述背光模组的结构，本发明还提出了一种液晶显示器，其包括 显示面板（图未示）、以及 上述实施例任意所述的背光模组。 导光板4、光学膜片7、以及显示面板依次平行放置。 该液晶显示器的 背光模组采用支架的结构，可以保证导光板与LED灯之间隔开一定的耦光距离，以提高耦光效率，从而达到提升显示品质的作用；再者可以防止 耦光距离的变化 造成显示品质降低及损坏LED灯的现象 。
上面结合附图对本发明的实施例进行了描述，但是本发明并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本发明的启示下，在不脱离本发明宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于本发明的保护之内。

Claims (18)

  1. 一种背光模组，包括背板、散热件、LED灯条、导光板、以及光学膜片；所述散热件包括安装在所述背板上的底板、以及与所述底板垂直的侧板；所述LED灯条设置在所述侧板的内侧表面上，且所述LED灯条包括基板、以及若干个设置在所述基板上的LED灯；所述导光板装设于所述底板的顶部，且所述导光板的入光面与所述LED灯的发光面相对；所述光学膜片装设于所述导光板的顶部；其中：所述背光模组还包括与所述侧板连接的支架；所述支架上靠近所述导光板的一侧至少设置有一个凸起的，用于限制所述导光板的位置的限位部；在与所述导光板的入光面垂直的方向上，所述限位部位于所述LED灯与所述导光板之间。
  2. 根据权利要求1所述的 背光模组，其中，所述限位部的末端与所述导光板的入光面相抵持。
  3. 根据权利要求1所述的背光模组，其中，在与所述导光板的入光面平行的方向上，所述限位部位于两个所述LED灯之间。
  4. 根据权利要求1所述的背光模组，其中，所述支架包括支架主体、以及设置在所述支架主体上的连接部；所述支架通过所述连接部连接在所述侧板上。
  5. 根据权利要求4所述的背光模组，其中，所述连接部上设置有卡槽；所述侧板上设置有用于与所述卡槽相互扣合连接的卡扣。
  6. 根据权利要求4所述的背光模组，其中，所述背光模组还包括连接件；所述连接件穿过所述连接部与所述侧板连接。
  7. 根据权利要求4所述的背光模组，其中，所述背光模组还包括双面胶；所述双面胶的一侧与所述连接部粘接，另一侧与所述侧板粘接。
  8. 根据权利要求1所述的 背光模组，其中，所述基板与所述侧板之间设置有导热膏。
  9. 根据权利要求1所述的 背光模组，其中，所述基板通过螺纹连接的方式设置在所述侧板上。
  10. 一种液晶显示器，其中，包括显示面板、以及背光模组；所述背光模组包括背板、散热件、LED灯条、导光板、以及光学膜片；所述导光板、所述光学膜片、以及所述显示面板依次平行放置；所述散热件包括安装在所述背板上的底板、以及与所述底板垂直的侧板；所述LED灯条设置在所述侧板的内侧表面上，且所述LED灯条包括基板、以及若干个设置在所述基板上的LED灯；所述导光板装设于所述底板的顶部，且所述导光板的入光面与所述LED灯的发光面相对；其中：所述背光模组还包括与所述侧板连接的支架；所述支架上靠近所述导光板的一侧至少设置有一个凸起的，用于限制所述导光板的位置的限位部；在与所述导光板的入光面垂直的方向上，所述限位部位于所述LED灯与所述导光板之间。
  11. 根据权利要求10所述的液晶显示器，其中，所述限位部的末端与所述导光板的入光面相抵持。
  12. 根据权利要求10所述的液晶显示器，其中，在与所述导光板的入光面平行的方向上，所述限位部位于两个所述LED灯之间。
  13. 根据权利要求10所述的液晶显示器，其中，所述支架包括支架主体、以及设置在所述支架主体上的连接部；所述支架通过所述连接部连接在所述侧板上。
  14. 根据权利要求13所述的液晶显示器，其中，所述连接部上设置有卡槽；所述侧板上设置有用于与所述卡槽相互扣合连接的卡扣。
  15. 根据权利要求13所述的液晶显示器，其中，所述背光模组还包括连接件；所述连接件穿过所述连接部与所述侧板连接。
  16. 根据权利要求13所述的液晶显示器，其中，所述背光模组还包括双面胶；所述双面胶的一侧与所述连接部粘接，另一侧与所述侧板粘接。
  17. 根据权利要求10所述的液晶显示器，其中，所述基板与所述侧板之间设置有导热膏。
  18. 根据权利要求10所述的液晶显示器，其中，所述基板通过螺纹连接的方式设置在所述侧板上。
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