WO2013149412A1 - 窄边框背光模组 - Google Patents

窄边框背光模组 Download PDF

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Publication number
WO2013149412A1
WO2013149412A1 PCT/CN2012/073919 CN2012073919W WO2013149412A1 WO 2013149412 A1 WO2013149412 A1 WO 2013149412A1 CN 2012073919 W CN2012073919 W CN 2012073919W WO 2013149412 A1 WO2013149412 A1 WO 2013149412A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
light guide
incident surface
light incident
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Application number
PCT/CN2012/073919
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English (en)
French (fr)
Inventor
黄建发
Original Assignee
深圳市华星光电技术有限公司
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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 US13/520,569 priority Critical patent/US9140930B2/en
Publication of WO2013149412A1 publication Critical patent/WO2013149412A1/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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer

Definitions

  • the present invention relates to the field of liquid crystal display, and in particular to a narrow frame 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 is required 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 (Lightbar) disposed on the edge of the back panel behind the liquid crystal panel, and the light emitted by the LED strip is from the light-emitting surface of the light guide plate (LGP, Light Guide Plate).
  • the light guide plate enters the light guide plate, is reflected and diffused, and is emitted from the light exit surface of the light guide plate, and is supplied to the liquid crystal display panel through the optical film group to form a surface light source.
  • a front-side backlight module having a bottom surface light includes a back plate 100, a bottom reflective sheet 200 disposed in the back plate 100, and a light guide plate 300 disposed on the bottom reflective sheet 200.
  • the side reflection sheet 500 has a reflective surface 502 disposed obliquely.
  • the backlight 400 is disposed under the reflection surface 502, and the light guide plate is disposed.
  • the 300 includes a top surface 302, a bottom surface 304, and a plurality of sides disposed perpendicular to the top surface and the bottom surface, one of which is defined as the light incident surface 306 for use.
  • the light emitted by the backlight 400 is reflected by the reflective surface 502 to the light incident surface 306 and then enters the light guide plate 300.
  • the backlight module of this structure has a good narrow side effect, and can realize a narrow side design with a minimum of 4.3 mm. However, the backlight module of this structure is completely reflected by the reflective surface 502 of the side reflection sheet 500 to enter In the light guide plate 300, this also limits the further narrowing design of the backlight module to some extent. Summary of the invention
  • the object of the present invention is to provide a narrow-frame backlight module, which has a simple structure and is advantageous for further narrowing of the backlight module.
  • the present invention provides a narrow-frame backlight module, including: a backplane, a backlight disposed in the backplane, a side reflection sheet disposed in the backplane, and a light guide plate disposed in the backplane.
  • the light guide plate includes a bottom surface, a top surface corresponding to the bottom surface, and a plurality of side surfaces disposed between the bottom surface and the top surface, wherein the plurality of side surfaces include at least one light incident surface, and the light incident surface is inclined with respect to the top surface, thereby The light incident surface and the top surface are formed to be less than 90.
  • the angle between the light emitted by the backlight is reflected by the side reflection sheet to the light incident surface or directly to the light incident surface, and then enters the light guide plate by the light incident surface.
  • T is the thickness of the light guide plate
  • d is the light incident.
  • the bottom surface of the light guide plate on the side of the surface is indented relative to the top surface, n is the light refractive index of the light guide plate, and ⁇ is the angle between the light incident surface of the light guide plate and the top surface.
  • the angle ⁇ between the light incident surface and the top surface is 83.6°, and the bottom surface of the light guide plate on the side where the light entrance surface is located
  • the relative top surface indentation d is 0.33 mm.
  • the angle between the light incident surface and the top surface is 77.4°, and the bottom surface of the light guide plate on the side where the light entrance surface is located is opposite.
  • the top surface indentation d is 0.89 mm.
  • the backplane includes a bottom plate and a side plate connected to the bottom plate.
  • the light guide plate is disposed on the bottom plate.
  • the source is located in the receiving space and is fixedly mounted on the bottom plate.
  • the side reflection sheet is located in the receiving space and is mounted on the side. On the board.
  • a bottom reflective sheet disposed between the light guide plate and the bottom plate.
  • the side reflection sheet has a reflection surface, and the backlight is located between the reflection surface of the side reflection sheet and the light incident surface of the light guide plate.
  • the backlight is located below the reflective surface of the side reflection sheet and the light incident surface of the light guide plate.
  • the backlight is a linear LED strip.
  • the narrow-frame backlight module of the present invention tilts the light-incident surface of the light guide plate
  • the light emitted by the backlight is reflected by the side reflection sheet to the light incident surface or directly to the light incident surface, and then enters the light guide plate by the light incident surface, thereby further narrowing the backlight module.
  • FIG. 1 is a schematic structural view of a conventional backlight module
  • FIG. 2 is a schematic structural view of a narrow-frame backlight module of the present invention. detailed description
  • the present invention provides a narrow-frame backlight module, including: a backplane 10, a backlight 20 disposed in the backplane 10, a side reflection sheet 30 disposed in the backplane 10, and a backplane Light guide plate 40 in 10.
  • the light guide plate 40 includes a bottom surface 42 , a top surface 44 corresponding to the bottom surface 42 , and a plurality of side surfaces disposed between the bottom surface 42 and the top surface 44 .
  • the plurality of side surfaces include at least one light incident surface 46 , and the light incident surface 46 It is disposed inwardly with respect to the top surface 44 such that the light incident surface 46 forms a smaller than 90 with the top surface 44.
  • the light emitted by the backlight 20 is reflected by the side reflection sheet 30 to the light incident surface 46 or directly to the light incident surface 46, and then enters the light guide plate 40 from the light incident surface 46.
  • the critical value of the angle between the light in the light guide plate 40 and the normal direction of the light incident surface 46 is also the total reflection angle ⁇ , which is calculated based on the geometric relationship.
  • the common light guide plate is taken as an example to illustrate:
  • Embodiment 1 When the light refractive index n of the light guide plate 40 is 1.5 and the thickness T of the light guide plate 40 is 4 mm, the angle ⁇ between the light incident surface 46 and the top surface 46 is 77.4°, and the light entrance surface 46 The bottom surface 42 of the light guide plate 40 on this side is retracted by the amount d of 0.89 mm from the top surface 44.
  • the angle ⁇ between the light incident surface 46 and the top surface 44 is 77.4°, and the light entrance surface 46
  • the bottom surface 42 of the light guide plate 40 on this side is retracted by the amount d of 0.89 mm from the top surface 44.
  • the present invention further realizes the narrowing of the backlight module based on the prior art, and the degree of narrowing is closely related to the refractive index n and the thickness T of the light guide plate, that is, the refractive index is selected.
  • n Large light guide plate can reduce the width of the frame more effectively, and increase the thickness T of the light guide plate can also effectively reduce the width of the frame to achieve a narrow frame design.
  • the backplane 10 includes a bottom plate 12 and a side plate 14 connected to the bottom plate 12.
  • the light guide plate 40 is disposed on the bottom plate 12.
  • the light incident surface 46 of the light guide plate 40 is common to the facing side plate 14 and the bottom plate 12.
  • An accommodating space 242 is formed.
  • the backlight 20 is disposed in the accommodating space 242 and is fixedly mounted on the bottom plate 12 .
  • the side reflection sheet 30 is located in the accommodating space 242 and is mounted on the side plate 14 .
  • the side reflector 30 has a reflective surface 32.
  • the backlight 20 is located between the reflective surface 32 of the side reflector 30 and the light incident surface 46 of the light guide plate 40.
  • the backlight 20 is located at the side reflector.
  • the reflecting surface 32 of the sheet 30 and the light guiding surface 40 of the light guide plate 40 are below the light incident surface 46.
  • the backlight module further includes a bottom reflective sheet 50 disposed between the light guide plate 40 and the bottom plate 12.
  • the backlight 20 is a linear LED strip.
  • the narrow-frame backlight module of the present invention tilts the light-incident surface of the light guide plate, and the light from the backlight is reflected by the side reflection sheet to the light-incident surface or directly to the light-incident surface:
  • the smooth surface enters the light guide plate, thereby further achieving the narrow frame of the backlight module.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种窄边框背光模组，包括：背板（10）、设于背板（10）内的背光源（20）、设于背板（10）内的侧反射片（30）及设于背板（10）内的导光板（40），所述导光板（40）包括底面（42）、对应底面（42）的顶面（44）及设于底面（42）与顶面（44）之间的数个侧面，该数个侧面中至少包括一个入光面（46），该入光面（46）相对于顶面（44）向内倾斜设置，从而使得所述入光面（46）与顶面（44）形成一小于90°的夹角，所述背光源（20）发出的光线经由侧反射片（30）反射到入光面（46）或直接照射到入光面（46），然后由入光面（46）进入导光板（40）。

Description

窄边框背光模组 技术领域
本发明涉及液晶显示领域， 尤其涉及一种窄边框背光模组。 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零组件之一。 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 ( Lightbar )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 )一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， 在经由光学膜片组， 以形成面光源提供给液晶 显示面板。
随着液晶显示装置的发展与普及， 市场越来越要求尽量使液晶显示面 板的厚度薄型化、 及使液晶显示面板的外框窄边框化。 如图 1 所示， 现有 一种底面入光的侧入式背光模组包括背板 100、 设置在背板 100 内的底反 射片 200、 设置在底反射片 200上的导光板 300、 设置在背板 100 内的背 光源 400及位于背光源 400上方的侧反射片 500, 所述侧反射片 500具有 一倾斜设置的反射面 502, 背光源 400设于该反射面 502下方， 所述导光 板 300 包括顶面 302、 底面 304、 及数个垂直于顶面与底面设置的侧面， 其中一个侧面定义为入光面 306进行使用。 背光源 400发出的光线经由反 射面 502反射到入光面 306, 然后进入导光板 300 内。 该种结构的背光模 组具有较好的窄边效果， 其可以实现最短为 4.3mm的窄边设计。 然而， 这 种结构的背光模组， 其光线全由侧反射片 500的反射面 502反射才能进入 导光板 300内， 这也在一定程度上限制了背光模组的进一步窄边化设计。 发明内容
本发明的目的在于提供一种窄边框背光模组， 其结构简单， 有利于背 光模组的进一步窄边化。
为实现上述目的， 本发明提供一种窄边框背光模组， 包括： 背板、 设 于背板内的背光源、 设于背板内的侧反射片、 及设于背板内的导光板， 所 述导光板包括底面、 对应底面的顶面及设于底面与顶面之间的数个侧面， 该数个侧面中至少包括一个入光面， 该入光面相对于顶面向内倾斜设置， 从而使得所述入光面与顶面形成一小于 90。的夹角， 所述背光源发出的光 线经由侧反射片反射到入光面或直接照射到入光面， 然后由入光面进入导 光板。 所述入光面与顶面的夹角依下列公式而定： e=2xarc sin( - ) , 且， n d=Txsin(90°-9), 其中： T 为导光板的厚度、 d 为入光面所在这一侧的导光 板的底面相对顶面缩进量、 n 为导光板光折射率、 Θ为导光板入光面与顶 面的夹角。
当所述导光板的光折射率 n为 1.45 , 导光板的厚度 T为 3mm时， 所 述入光面与顶面的夹角 Θ为 83.6° , 光入面所在这一侧的导光板的底面相 对顶面缩进量 d为 0.33mm。
当所述导光板的光折射率 n为 1.5 , 导光板的厚度 T为 4mm时， 所述 入光面与顶面的夹角为 77.4° , 光入面所在这一侧的导光板的底面相对顶 面缩进量 d为 0.89mm。
所述背板包括底板及连接于底板的侧板， 所述导光板设于底板上， 该 源位于该容置空间^并固定安装于底板上 述侧反射片位于该容置空间 内并安装于侧板上。
还包括设于导光板与底板之间的底反射片。
所述侧反射片具有一反射面， 所述背光源位于该侧反射片的反射面与 导光板入光面之间。
所述背光源位于该侧反射片的反射面与导光板入光面的下方。
所述背光源为线性 LED灯条。
本发明的有益效果： 本发明窄边框背光模组， 将导光板的入光面倾斜 使得所述背光源发出的光线经由侧反射片反射到入光面或直接照射到入光 面， 然后由入光面进入导光板， 从而进一步实现了背光模组的窄边化。
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为现有的背光模组结构示意图；
图 2为本发明窄边框背光模组结构示意图。 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, 本发明提供一种窄边框背光模组， 包括： 背板 10、 设于 背板 10内的背光源 20、 设于背板 10内的侧反射片 30、 及设于背板 10内 的导光板 40。
所述导光板 40包括底面 42、 对应底面 42的顶面 44及设于底面 42与 顶面 44之间的数个侧面， 该数个侧面中至少包括一个入光面 46, 该入光 面 46相对于顶面 44向内倾斜设置， 从而使得所述入光面 46与顶面 44形 成一小于 90。的夹角， 所述背光源 20发出的光线经由侧反射片 30反射到 入光面 46或直接照射到入光面 46, 然后由入光面 46进入导光板 40。 所述入光面 46 与顶面 44 的夹角依下列公式而定： e=2xarc sin(-) , n 且， d=Txsin(90。-e), 其中： T为导光板 40的厚度、 d为入光面 46所在这 一侧的导光板 40的底面 42相对顶面 44缩进量、 n为导光板 40光折射 率、 Θ为导光板 40入光面 46与顶面 44的夹角， 则， 光线在导光板 40的 顶面 44发生全反射的全反射角 a=arc sin (丄）， 要满足光线进入导光板 40 n
后不从入光面 46射出， 则， 在导光板 40 内的光线与入光面 46的法线方 向的夹角的临界值也为全反射角 α , 根据几何关系计算， 则， 所述导光板
40入光面 46与顶面 44的夹角 θ=2χα, 即， θ= 2xarc sin (丄）， 进一步的， η 导光板 40底面 42相对顶面 44缩进量 d=Txtan(90°-e), 由于该夹角 90°-θ 较小， 所以 tan(90。-e) « sin(90°-9), 即， d=Txsin(90。-e)。
根据上述公式， 现以常用导光板为例， 具体说明：
实施例一、 当所述导光板 40的光折射率 n为 1.5 , 导光板 40的厚度 T 为 4mm时， 所述入光面 46与顶面 46的夹角 Θ为 77.4°, 光入面 46所在 这一侧的导光板 40的底面 42相对顶面 44缩进量 d为 0.89mm。
实施例二、 当所述导光板 40的光折射率 n为 1.5 , 导光板 40的厚度 T 为 4mm时， 所述入光面 46与顶面 44的夹角 Θ为 77.4°, 光入面 46所在 这一侧的导光板 40的底面 42相对顶面 44缩进量 d为 0.89mm。
由上述具体实施例可见， 本发明在现有技术的基础上进一步实现了背 光模组的窄边化， 而窄边化的程度与导光板的折射率 n及厚度 T 密切相 关， 即选用折射率 n较大的导光板可以更有效的减小边框宽度， 增加导光 板厚度 T也同样可以有效的减小边框宽度， 实现窄边框设计。
所述背板 10包括底板 12及连接于底板 12的侧板 14, 所述导光板 40 设于底板 12上， 该导光板 40的入光面 46与其相面对的侧板 14及底板 12 共同形成一容置空间 242, 所述背光源 20位于该容置空间 242内并固定安 装于底板 12上， 所述侧反射片 30位于该容置空间 242内并安装于侧板 14 上。
所述侧反射片 30具有一反射面 32, 所述背光源 20位于该侧反射片 30的反射面 32与导光板 40入光面 46之间； 优选的， 所述背光源 20位于 该侧反射片 30的反射面 32与导光板 40入光面 46的下方。
所述背光模组还包括设于导光板 40与底板 12之间的底反射片 50。 所述背光源 20为线性 LED灯条。
综上所述， 本发明窄边框背光模组， 将导光板的入光面倾斜设置， 并 背光源 ^出的光线经由侧反射片反射到入光面或直接照射到入光面: 然后 由入光面进入导光板， 从而进一步实现了背光模组的窄边框化。
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、 一种窄边框背光模组， 包括： 背板、 设于背板内的背光源、 设于 背板内的侧反射片、 及设于背板内的导光板， 所述导光板包括底面、 对应 底面的顶面及设于底面与顶面之间的数个侧面， 该数个侧面中至少包括一 个入光面， 该入光面相对于顶面向内倾斜设置， 从而使得所述入光面与顶 面形成一小于 90。的夹角， 所述背光源发出的光线经由侧反射片反射到入 光面或直接照射到入光面， 然后由入光面进入导光板。
2、 如权利要求 1 所述的窄边框背光模组， 其中， 所述入光面与顶面 的夹角依下列公式而定： 0=2xarc sin(- ) , 且， d=Txsin(9O。-0) , 其中： T n
为导光板的厚度、 d 为入光面所在这一侧的导光板的底面相对顶面缩进 量、 n为导光板光折射率、 Θ为导光板入光面与顶面的夹角。
3、 如权利要求 2 所述的窄边框背光模组， 其中， 当所述导光板的光 折射率 n为 1.45 , 导光板的厚度 T为 3mm时， 所述入光面与顶面的夹角 Θ为 83.6° , 光入面所在这一侧的导光板的底面相对顶面缩进量 d 为 0.33mm。
4、 如权利要求 2 所述的窄边框背光模组， 其中， 当所述导光板的光 折射率 n为 1.5 , 导光板的厚度 T为 4mm时， 所述入光面与顶面的夹角为 77.4°, 光入面所在这一侧的导光板的底面相对顶面缩进量 d为 0.89mm。
5、 如权利要求 1 所述的窄边框背光模组， 其中， 所述背板包括底板 及连接于底板的侧板， 所述导光板设于底板上， 该导光板的入光面与其相 面对的侧板及底板共同形成一容置空间， 所述背光源位于该容置空间内并 固定安装于底板上， 所述侧反射片位于该容置空间内并安装于侧板上。
6、 如权利要求 4 所述的窄边框背光模组， 其中， 还包括设于导光板 与底板之间的底反射片。
7、 如权利要求 1 所述的窄边框背光模组， 其中， 所述侧反射片具有 一反射面， 所述背光源位于该侧反射片的反射面与导光板入光面之间。
8、 如权利要求 7 所述的窄边框背光模组， 其中， 所述背光源位于该 侧反射片的反射面与导光板入光面的下方。
9、 如权利要求 1 所述的窄边框背光模组， 其中， 所述背光源为线性
LED灯条。
10、 一种窄边框背光模组， 包括： 背板、 设于背板内的背光源、 设于 背板内的侧反射片、 及设于背板内的导光板， 所述导光板包括底面、 对应 底面的顶面及设于底面与顶面之间的数个侧面， 该数个侧面中至少包括一 个入光面， 该入光面相对于顶面向内倾斜设置， 从而使得所述入光面与顶 面形成一小于 90。的夹角， 所述背光源发出的光线经由侧反射片反射到入 光面或直接照射到入光面， 然后由入光面进入导光板；
其中， 所述入光面与顶面的夹角依下列公式而定： e=2xarc sin (丄）， n 且， d=Txsin(90。-e), 其中： T 为导光板的厚度、 d 为入光面所在这一侧的 导光板的底面相对顶面缩进量、 n 为导光板光折射率、 Θ为导光板入光面 与顶面的夹角；
其中， 所述背板包括底板及连接于底板的侧板， 所述导光板设于底板 述背光源位于该容置空间^并固定安装于底板上 述侧反射片位于该容 置空间内并安装于侧板上；
其中， 还包括设于导光板与底板之间的底反射片；
其中， 所述侧反射片具有一反射面， 所述背光源位于该侧反射片的反 射面与导光板入光面之间；
其中， 所述背光源位于该侧反射片的反射面与导光板入光面的下方； 其中， 所述背光源为线性 LED灯条。
PCT/CN2012/073919 2012-04-01 2012-04-12 窄边框背光模组 WO2013149412A1 (zh)

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