WO2014040345A1 - 侧入式背光模组 - Google Patents

侧入式背光模组 Download PDF

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Publication number
WO2014040345A1
WO2014040345A1 PCT/CN2012/085775 CN2012085775W WO2014040345A1 WO 2014040345 A1 WO2014040345 A1 WO 2014040345A1 CN 2012085775 W CN2012085775 W CN 2012085775W WO 2014040345 A1 WO2014040345 A1 WO 2014040345A1
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WO
WIPO (PCT)
Prior art keywords
mounting part
backlight module
light guide
backlight
guide plate
Prior art date
Application number
PCT/CN2012/085775
Other languages
English (en)
French (fr)
Inventor
萧宇均
李全
Original Assignee
深圳市华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US13/807,297 priority Critical patent/US8985829B2/en
Publication of WO2014040345A1 publication Critical patent/WO2014040345A1/zh

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Classifications

    • 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

Definitions

  • the present invention relates to the field of liquid crystal display, and in particular to a side-lit backlight module. Background technique
  • Liquid crystal display has many advantages such as thin body, power saving, and no radiation, and has been widely used.
  • Most of the liquid crystal display devices on the market are backlight type liquid crystal display devices, which include a liquid crystal panel and a backlight module.
  • the working principle of the liquid crystal panel is to place liquid crystal molecules in two parallel glass substrates. There are many vertical and horizontal small wires between the two glass substrates, and the liquid crystal molecules are controlled to change direction by energization or not, and the light of the backlight module is refracted. Come out to produce the picture. Since the liquid crystal panel itself does not emit light, the light source provided by the backlight module needs to be used to display the image normally. Therefore, the backlight module becomes one of the key components of the liquid crystal display device.
  • the backlight module is divided into a side-in backlight module and a direct-lit backlight module according to different incident positions of the light source.
  • a light source such as a CCFL (Cold Cathode Fluorescent Lamp) or an LED (Light Emitting Diode) is disposed behind the liquid crystal panel, and a surface light source is directly formed and supplied to the liquid crystal panel.
  • the side-lit backlight module has a backlight LED strip (Light bar) disposed on the edge of the back panel behind the liquid crystal panel, and the light emitted by the LED strip is lighted from the light guide plate (LGP). The surface enters the light guide plate, is reflected and diffused, and is emitted from the light exit surface of the light guide plate, and then is supplied to the liquid crystal panel through the optical film group to form a surface light source.
  • LGP light guide plate
  • the edge-lit backlight module has a lower composition, and has the advantages of making the liquid crystal display device narrow frame and ultra-thin, and the application is more and more widely used.
  • FIG. 1 a cross-sectional view of a backlight and a heat-dissipating aluminum extrusion in a conventional side-entry backlight module. Since the backlight LED strip 100 itself generates a large amount of heat, it needs to be attached to the thermal double-sided tape 300.
  • the heatsink 500 in order to reduce the cost, the area of the PCB board 102 of the backlight LED strip 100 is reduced, and the PCB board 102 is formed into a knife type, and the blade portion is inserted into the heat dissipating aluminum extrusion 500, and the heat dissipating aluminum is extruded 500.
  • the corresponding part is slotted.
  • the burr 508 is easily formed between the bottom plate 504 of the heat dissipation aluminum extrusion 500 and the side plate 506, so that the PCB board 102 and the side plate 506 of the heat dissipation aluminum extrusion 500 are not closely attached in parallel, thereby causing the backlight LED.
  • the light-emitting surface of the light bar 100 and the light-incident surface of the light guide plate have a certain angle, which affects the utilization of light, and causes the brightness quality of the module to be lowered. If it is processed for heat-dissipating aluminum extrusion, CNC machining is required, which increases the cost and reduces the efficiency, which affects the production capacity. Summary of the invention
  • the object of the present invention is to provide a side-in type backlight module, which has a simple structure, facilitates assembly of a backlight, improves light source utilization efficiency, and reduces cost.
  • the present invention provides a side-lit backlight module, including: a backplane, a backlight disposed in the backplane, and a light guide plate disposed in the backplane, wherein the backplane is disposed between the backlight and the backlight
  • the heat dissipation aluminum extrusion includes a first mounting portion and a second mounting portion vertically connected to the first mounting portion, the backlight is mounted on the first mounting portion, and the first mounting portion is adjacent to the first mounting portion
  • the mounting portion is provided with a sloped surface extending from the connecting end of the first and second mounting portions toward the backlight.
  • the angle between the slope and the vertical plane is 3 to 8°.
  • the bevel is formed by oblique press working.
  • the backlight comprises a PCB board, a plurality of LED lamps mounted and electrically connected to the PCB board, and a rectifier mounted and electrically connected to the PCB board.
  • the second mounting portion is provided with a receiving groove corresponding to the rectifier.
  • the back plate includes a bottom plate and a side plate vertically connected to the bottom plate, the first mounting portion abuts against the side plate, and the second mounting portion is screwed to the bottom plate.
  • the second mounting portion is disposed away from the first mounting portion end with a convex portion, and the light guide plate is carried on the convex portion.
  • the side-lit backlight module further includes a reflective sheet disposed between the light guide plate and the protrusion and an optical film set disposed on the light guide plate.
  • the backlight is mounted on the first mounting portion by a thermal adhesive.
  • the present invention also provides a side-lit backlight module, comprising: a back plate, a backlight disposed in the back plate, and a light guide plate disposed in the back plate, wherein the back plate and the backlight are provided with heat dissipation aluminum extrusion
  • the heat dissipation aluminum extrusion includes a first mounting portion and a second mounting portion vertically connected to the first mounting portion, the backlight is mounted on the first mounting portion, and the first mounting portion is adjacent to the second mounting portion. a slope is provided, the slope is extended from the connection end of the first and second mounting portions toward the backlight;
  • angle between the inclined surface and the vertical plane is 3 ⁇ 8°
  • the inclined surface is formed by oblique pressing processing
  • the backlight comprises a PCB board, several installed and electrically connected to the PCB board
  • the LED lamp is mounted and electrically connected to the rectifier on the PCB board;
  • the second mounting portion is provided with a receiving groove corresponding to the rectifier
  • the backplane includes a bottom plate and a side plate vertically connected to the bottom plate, the first mounting portion abuts against the side plate, and the second mounting portion is locked to the bottom plate by screws; Wherein the second mounting portion is disposed away from the end of the first mounting portion with a convex portion, and the light guide plate is carried on the convex portion;
  • the invention further includes a reflective sheet disposed between the light guide plate and the convex portion and an optical film set disposed on the light guide plate;
  • the backlight is mounted on the first mounting portion by a thermal adhesive.
  • the side-entry backlight module provided by the present invention provides a beveled surface at the lower end of the first mounting portion of the heat dissipating aluminum extrusion, thereby avoiding assembly interference that may occur in the prior art, and ensuring a backlight emitting surface Parallel to the light-incident surface of the light guide plate, the structure is simple, easy to process, convenient to install, and the utilization ratio of light entering is improved, and the cost is reduced.
  • FIG. 1 is a cross-sectional view showing a backlight and a heat-dissipating aluminum extrusion in a conventional side-entry backlight module
  • FIG. 2 is a schematic structural view of a side-entry backlight module according to the present invention
  • FIG. 3 is an assembled, isometric view of a heat dissipating aluminum extrusion and a backlight in a side-lit backlight module of the present invention. detailed description
  • the present invention provides a side-entry backlight module, including: a backplane
  • the heat dissipation aluminum extrusion 8 is disposed between the back plate 2 and the backlight 4, and the heat dissipation aluminum extrusion 8 includes a first mounting portion 82 and a second mounting portion 84 vertically connected to the first mounting portion 82.
  • the source 4 is mounted on the first mounting portion 82.
  • the first mounting portion 82 is disposed adjacent to the second mounting portion 84 at a position of a slope 822.
  • the inclined surface 822 is connected to the backlight by the connecting ends of the first and second mounting portions 82 and 84. 4 extended settings.
  • the slope 822 is formed by oblique press processing, and the angle ⁇ between the vertical plane and the vertical plane is 3 to 8.
  • the light-emitting surface 442 can be parallel to the light-incident surface 62 of the light guide plate 6, thereby improving the utilization ratio of the light emitted by the backlight 4 and improving the back.
  • Light module brightness quality is improved.
  • the backlight 4 includes a PCB board 42, a plurality of LED lamps 44 mounted and electrically connected to the PCB board 42, and a rectifier 46 mounted and electrically connected to the PCB board 42.
  • the second mounting portion 84 is provided with a receiving groove 842 corresponding to the rectifier 46. When assembled, the rectifier 46 is received in the receiving groove 842.
  • the back plate 2 includes a bottom plate 22 and a side plate 24 connected perpendicularly to the bottom plate 22.
  • the first mounting portion 82 abuts against the side plate 24, and the second mounting portion 84 is locked by a screw (not shown). It is fitted to the bottom plate 22.
  • a protrusion 844 is disposed on the end of the second mounting portion 84 away from the first mounting portion 82.
  • the light guide plate 6 is carried on the protrusion portion 844.
  • the backlight module further includes a reflective sheet 9 disposed between the light guide plate 6 and the raised portion 844 and an optical film set 10 disposed on the light guide plate.
  • the backlight 4 is attached to the first mounting portion 82 through the thermal conductive adhesive 12 to enhance the heat conduction effect and improve the quality of the backlight module.
  • the edge-lit backlight module provided by the present invention provides a beveled surface at the lower end of the first mounting portion of the heat-dissipating aluminum extrusion, thereby avoiding assembly interference that may occur in the prior art, and ensuring the backlight emitting surface and
  • the light guide plate is parallel to the light entrance surface, and the structure is simple, easy to process, and convenient to install, thereby improving the utilization rate of light input and reducing the cost.

Abstract

一种侧入式背光模组，包括：背板（2）、设于背板（2）内的背光源（4）及设于背板（2）内的导光板（6），背板（2）与背光源（4）之间设有散热铝挤（8），散热铝挤（8）包括第一安装部（82）及垂直连接于第一安装部（82）的第二安装部（84），背光源（4）安装于第一安装部（82）上，第一安装部（82）靠近第二安装部（84）位置设有一斜面（822），斜面（822）由第一与第二安装部（82，84）的连接端朝向背光源（4）延伸设置。该侧入式背光模组，通过在散热铝挤（8）的第一安装部（82）的下端设置一斜面（822），避免了现有技术中可能出现的装配干涉，确保背光源（4）发光面与导光板（6）入光面的平行，该结构简单，易加工，安装方便，提高了入光利用率，降低了成本。

Description

侧入式背光模组 技术领域
本发明涉及液晶显示领域， 尤其涉及一种侧入式背光模组。 背景技术
液晶显示装置 （LCD, Liquid Crystal Display )具有机身薄、 省电、 无 辐射等众多优点， 得到了广泛的应用。 现有市场上的液晶显示装置大部分 为背光型液晶显示装置， 其包括液晶面板及背光模组 （ backlight module ) 。 液晶面板的工作原理是在两片平行的玻璃基板当中放置液晶分 子， 两片玻璃基板中间有许多垂直和水平的细小电线， 通过通电与否来控 制液晶分子改变方向， 将背光模组的光线折射出来产生画面。 由于液晶面 板本身不发光， 需要借由背光模组提供的光源来正常显示影像， 因此， 背 光模组成为液晶显示装置的关键组件之一。 背光模组依照光源入射位置的 不同分成侧入式背光模组与直下式背光模组两种。 直下式背光模组是将发 光光源例如 CCFL(Cold Cathode Fluorescent Lamp , 阴极萤光灯管）或 LED(Light Emitting Diode, 发光二极管)设置在液晶面板后方， 直接形成面 光源提供给液晶面板。 而侧入式背光模组是将背光源 LED 灯条（Light bar )设于液晶面板侧后方的背板边缘， LED 灯条发出的光线从导光板 ( LGP, Light Guide Plate )—侧的入光面进入导光板， 经反射和扩散后从 导光板出光面射出， 再经由光学膜片组以形成面光源提供给液晶面板。
侧光式背光模由于组成本较低， 并具有将液晶显示装置做到窄边框， 超薄化等优势， 应用越来越广泛。 请参阅图 1 , 为现有的侧入式背光模组 中背光源与散热铝挤贴合剖视图， 由于背光源 LED 灯条 100 本身发热量 大， 需要将其通过导热双面胶 300贴附在散热铝挤（heatsink ) 500上， 为 了降低成本， 减少背光源 LED灯条 100的 PCB板 102的面积， 将 PCB板 102做成刀型， 刀型部分插入散热铝挤 500中， 散热铝挤 500对应部分开 槽。 但由于加工的限制， 散热铝挤 500的底板 504与侧板 506之间易形成 毛刺 508 , 导致 PCB板 102与散热铝挤 500的侧板 506没有很好的平行贴 附， 进而导致背光源 LED 灯条 100 的发光面与导光板（未图示） 的入光 面存在一定的角度， 影响光的利用率， 造成模组亮度品质的降低。 如果针 对散热铝挤部分^加工， 需要采用 CNC 加工， 这样增加成本， 且效率相 对降低， 影响产能。 发明内容
本发明的目的在于提供一种侧入式背光模组， 其结构简单， 方便背光 源的组装， 提升光源入光利用率， 降低成本。
为实现上述目的， 本发明提供一种侧入式背光模组， 包括： 背板、 设 于背板内的背光源及设于背板内的导光板， 所述背板与背光源之间设有散 热铝挤， 所述散热铝挤包括第一安装部及垂直连接于该第一安装部的第二 安装部， 所述背光源安装于该第一安装部上， 该第一安装部靠近第二安装 部位置设有一斜面， 该斜面由第一与第二安装部的连接端朝向背光源延伸 设置。
所述斜面与竖直平面之间的夹角为 3〜8° 。
所述斜面通过斜冲压加工形成。
所述背光源包括 PCB板、 安装并电性连接于 PCB板上的数个 LED灯 及安装并电性连接于 PCB板上整流器。
所述第二安装部对应该整流器设有容置槽。
所述背板包括底板及垂直连接于底板的侧板， 所述第一安装部抵靠于 侧板上， 所述第二安装部通过螺钉锁合于底板上。
所述第二安装部远离第一安装部端设有一凸起部， 所述导光板承载于 该凸起部上。
所述侧入式背光模组还包括设于导光板与凸起部之间的反射片及设于 导光板上的光学膜片组。
所述背光源通过导热胶贴合安装于第一安装部上。
本发明还提供一种侧入式背光模组， 包括： 背板、 设于背板内的背光 源及设于背板内的导光板， 所述背板与背光源之间设有散热铝挤， 所述散 热铝挤包括第一安装部及垂直连接于该第一安装部的第二安装部， 所述背 光源安装于该第一安装部上， 该第一安装部靠近第二安装部位置设有一斜 面， 该斜面由第一与第二安装部的连接端朝向背光源延伸设置；
其中， 所述斜面与竖直平面之间的夹角为 3〜8° ；
其中， 所述斜面通过斜冲压加工形成；
其中， 所述背光源包括 PCB板、 安装并电性连接于 PCB板上的数个
LED灯及安装并电性连接于 PCB板上整流器；
其中， 所述第二安装部对应该整流器设有容置槽；
其中， 所述背板包括底板及垂直连接于底板的侧板， 所述第一安装部 抵靠于侧板上， 所述第二安装部通过螺钉锁合于底板上； 其中， 所述第二安装部远离第一安装部端设有一凸起部， 所述导光板 承载于该凸起部上；
还包括设于导光板与凸起部之间的反射片及设于导光板上的光学膜片 组；
其中， 所述背光源通过导热胶贴合安装于第一安装部上。
本发明的有益效果： 本发明提供的侧入式背光模组， 其通过在散热铝 挤第一安装部的下端设置一斜面， 避免了现有技术中可能出现的装配干 涉， 确保背光源发光面与导光板入光面的平行， 该结构简单， 易加工， 安 装方便， 提高了入光利用率， 降低了成本。
为了能更进一步了解本发明的特征以及技术内容， 请参阅以下有关本 发明的详细说明与附图， 然而附图仅提供参考与说明用， 并非用来对本发 明加以限制。 附图说明
下面结合附图， 通过对本发明的具体实施方式详细描述， 将使本发明 的技术方案及其它有益效果显而易见。
附图中，
图 1为现有的侧入式背光模组中背光源与散热铝挤贴合剖视图； 图 2为本发明侧入式背光模组的结构示意图；
图 3为本发明侧入式背光模组中散热铝挤与背光源的立体组装图。 具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果， 以下结合本发明 的优选实施例及其附图进行详细描述。
请参阅图 2 及图 3 , 本发明提供一种侧入式背光模组， 包括： 背板
2、 设于背板 2内的背光源 4及设于背板 2内的导光板 6。
所述背板 2与背光源 4之间设有散热铝挤 8 , 所述散热铝挤 8包括第 一安装部 82及垂直连接于该第一安装部 82的第二安装部 84, 所述背光源 4安装于该第一安装部 82上， 该第一安装部 82靠近第二安装部 84位置设 有一斜面 822 , 该斜面 822由第一与第二安装部 82、 84的连接端朝向背光 源 4延伸设置。
所述斜面 822 通过斜冲压加工形成， 其与竖直平面之间的夹角 α为 3〜8。 ， 进而使得背光源 4安装于散热铝挤 8上时， 其出光面 442能与导 光板 6的入光面 62平行， 进而提高背光源 4发出的光的利用率， 提高背 光模组亮度品质。
所述背光源 4包括 PCB板 42、 安装并电性连接于 PCB板 42上的数 个 LED灯 44及安装并电性连接于 PCB板 42上整流器 46。
所述第二安装部 84对应该整流器 46设有容置槽 842, 组装时， 所述 整流器 46容置于该容置槽 842内。
所述背板 2包括底板 22及连垂直接于底板 22的侧板 24, 所述第一安 装部 82抵靠于侧板 24上， 所述第二安装部 84通过螺钉（未图示）锁合 于底板 22上。
所述第二安装部 84远离第一安装部 82端设有一凸起部 844, 所述导 光板 6承载于该凸起部 844上。
所述背光模组还包括设于导光板 6与凸起部 844之间的反射片 9及设 于导光板上的光学膜片组 10。
所述背光源 4通过导热胶 12贴合安装于第一安装部 82上， 以增强导 热效果， 提升背光模组品质。
综上所述， 本发明提供的侧入式背光模组， 其通过在散热铝挤第一安 装部的下端设置一斜面， 避免了现有技术中可能出现的装配干涉， 确保背 光源发光面与导光板入光面的平行， 该结构简单， 易加工， 安装方便， 提 高了入光利用率， 降低了成本。
以上所述， 对于本领域的普通技术人员来说， 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形， 而所有这些改变和变形 都应属于本发明权利要求的保护范围。

Claims

权 利 要 求
1、 一种侧入式背光模组， 包括： 背板、 设于背板内的背光源及设于 背板内的导光板， 所述背板与背光源之间设有散热铝挤， 所述散热铝挤包 括第一安装部及垂直连接于该第一安装部的第二安装部， 所述背光源安装 于该第一安装部上， 该第一安装部靠近第二安装部位置设有一斜面， 该斜 面由第一与第二安装部的连接端朝向背光源延伸设置。
2、 如权利要求 1 所述的侧入式背光模组， 其中， 所述斜面与竖直平 面之间的夹角为 3〜8° 。
3、 如权利要求 1 所述的侧入式背光模组， 其中， 所述斜面通过斜冲 压加工形成。
4、 如权利要求 1 所述的侧入式背光模组， 其中， 所述背光源包括 PCB板、 安装并电性连接于 PCB板上的数个 LED灯及安装并电性连接于 PCB板上整流器。
5、 如权利要求 4 所述的侧入式背光模组， 其中， 所述第二安装部对 应该整流器设有容置槽。
6、 如权利要求 1 所述的侧入式背光模组， 其中， 所述背板包括底板 及垂直连接于底板的侧板， 所述第一安装部抵靠于侧板上， 所述第二安装 部通过螺钉锁合于底板上。
7、 如权利要求 1 所述的侧入式背光模组， 其中， 所述第二安装部远 离第一安装部端设有一凸起部， 所述导光板承载于该凸起部上。
8、 如权利要求 7 所述的侧入式背光模组， 还包括设于导光板与凸起 部之间的反射片及设于导光板上的光学膜片组。
9、 如权利要求 1 所述的侧入式背光模组， 其中， 所述背光源通过导 热胶贴合安装于第一安装部上。
10、 一种侧入式背光模组， 包括： 背板、 设于背板内的背光源及设于 背板内的导光板， 所述背板与背光源之间设有散热铝挤， 所述散热铝挤包 括第一安装部及垂直连接于该第一安装部的第二安装部， 所述背光源安装 于该第一安装部上， 该第一安装部靠近第二安装部位置设有一斜面， 该斜 面由第一与第二安装部的连接端朝向背光源延伸设置；
其中， 所述斜面与竖直平面之间的夹角为 3〜8° ；
其中， 所述斜面通过斜冲压加工形成；
其中， 所述背光源包括 PCB板、 安装并电性连接于 PCB板上的数个 LED灯及安装并电性连接于 PCB板上整流器；
其中， 所述第二安装部对应该整流器设有容置槽；
其中， 所述背板包括底板及垂直连接于底板的侧板， 所述第一安装部 抵靠于侧板上， 所述第二安装部通过螺钉锁合于底板上；
其中， 所述第二安装部远离第一安装部端设有一凸起部， 所述导光板 承载于该凸起部上；
还包括设于导光板与凸起部之间的反射片及设于导光板上的光学膜片 组；
其中， 所述背光源通过导热胶贴合安装于第一安装部上。
PCT/CN2012/085775 2012-09-11 2012-12-04 侧入式背光模组 WO2014040345A1 (zh)

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