WO2012129840A1 - 液晶显示装置及其背光模组 - Google Patents

液晶显示装置及其背光模组 Download PDF

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Publication number
WO2012129840A1
WO2012129840A1 PCT/CN2011/075129 CN2011075129W WO2012129840A1 WO 2012129840 A1 WO2012129840 A1 WO 2012129840A1 CN 2011075129 W CN2011075129 W CN 2011075129W WO 2012129840 A1 WO2012129840 A1 WO 2012129840A1
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WO
WIPO (PCT)
Prior art keywords
light
backlight module
light source
incident surface
liquid crystal
Prior art date
Application number
PCT/CN2011/075129
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English (en)
French (fr)
Inventor
张光耀
黄建发
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 US13/260,368 priority Critical patent/US20120249922A1/en
Publication of WO2012129840A1 publication Critical patent/WO2012129840A1/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
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a liquid crystal display device and a backlight module thereof. ⁇ Background technique ⁇
  • the liquid crystal display device generally includes a backlight module and a liquid crystal display panel which are stacked, and the liquid crystal display panel itself does not emit light, and the backlight module is required to provide backlight for display.
  • a typical point source device light-emitting diodes (LEDs) are often used as key components in backlight modules.
  • LEDs light-emitting diodes
  • One of the more common ones is to use a plurality of light-emitting diodes as a point source array disposed on a surface of a printed circuit board (PCB) to form a light bar.
  • PCB printed circuit board
  • the plurality of light emitting diodes emit light under the driving action of the printed circuit board, thereby forming a strip line light source, and then changing the light emitting direction through the light guide plate (LGP) of the backlight module to obtain a uniform surface light source.
  • LGP light guide plate
  • the light emitting surface of the light emitting diode is generally similar to the thickness of the light guide plate.
  • the distance between the light emitting diode and the light incident surface of the light guide plate affects the coupling efficiency of the light.
  • between the light emitting diode and the light incident surface of the light guide plate is limited due to various factors such as tolerances of components such as printed circuit boards and heat sinks, thermal expansion of the light guide plate, and water swelling. It is often easy to cause poor light coupling efficiency of the backlight module. [Summary of the Invention]
  • the technical problem to be solved by the present invention is to provide a backlight module to solve the problem of poor light coupling efficiency of the backlight module of the liquid crystal display device in the prior art.
  • a technical solution for the present invention is to provide a backlight module, which includes a light guide plate and a light source, the light guide plate includes a light incident surface, and the light source is disposed adjacent to the light incident surface.
  • the backlight module further includes a protruding portion that abuts the light incident surface to define a distance between the light source and the light incident surface.
  • the light source includes a plurality of point light sources and a printed circuit board electrically connected to the plurality of point light sources, the protrusions including a plurality of protruding elements, the plurality of protruding elements and the plurality of The point sources are spaced apart from each other.
  • the plurality of protruding elements 4 are connected to the light incident surface.
  • the backlight module further includes a light source bracket, and the light source and the protruding portion are disposed on the light source bracket.
  • the protruding portion is a screw fixed to the light source bracket.
  • the projection is a clamping element that is clamped to the light source holder.
  • the protruding portion is a covering member attached to the light source holder.
  • another technical solution of the present invention is to provide: a liquid crystal display device including a liquid crystal display panel and a backlight module, wherein the backlight module is disposed adjacent to the liquid crystal display panel, The backlight module includes a light guide plate and a light source, and the light guide plate includes a light incident surface, the light source is disposed adjacent to the light incident surface, wherein the backlight module further includes a protruding portion, the protruding portion abuts the light incident surface The distance between the light source and the light incident surface is defined to be greatly separated.
  • a backlight module which includes a light guide plate and a plurality of light emitting elements, the light guide plate includes a light incident surface, and the plurality of light emitting elements
  • the backlight module further includes a plurality of protruding elements, and the plurality of protruding elements and the plurality of light emitting elements are spaced apart from each other, and are connected to the light incident surface.
  • a liquid crystal display device including a liquid crystal display panel and a backlight module, the backlight module being disposed adjacent to the liquid crystal display panel, the backlight
  • the module includes a light guide plate and a plurality of light-emitting elements, the light guide plate includes a light-incident surface, and the plurality of light-emitting elements are spaced apart from the light-incident surface, wherein the backlight module further includes a plurality of protruding elements, the plurality of convexities
  • the output element and the plurality of light emitting elements are spaced apart from each other and connected to the light incident surface by four.
  • the backlight module provided by the present invention has the light coupling efficiency of the optical module.
  • FIG. 1 is a schematic cross-sectional view of a preferred embodiment of a backlight module of the present invention
  • FIG. 2 is a front elevational view of the backlight module shown in FIG. 1;
  • FIG 3 is a simplified schematic view of a preferred embodiment of a liquid crystal display device of the present invention.
  • the present invention provides a novel backlight module 10, which includes a light guide plate 100, a light source 200, and a protruding portion 300.
  • the light guide plate 100 includes a light incident surface 110.
  • the light source 200 is disposed adjacent to the light incident surface 110.
  • the protruding portion 3004 is coupled to the light incident surface 110 to define a distance between the light source 200 and the light incident surface 110. .
  • the light source 200 includes a plurality of point light sources 210 (eg, a plurality of light emitting diodes) and a printed circuit board 220 electrically connected to the plurality of point light sources 210.
  • the protruding portion 300 includes a plurality of protruding elements, such as screws 310, the plurality of protruding elements and the plurality of point light sources 210 are spaced apart from each other The plurality of protruding elements 4 are connected to the light incident surface 110.
  • the backlight module 10 further includes a light source bracket 400. As shown in FIG. 1 and FIG. 2, the light source 200 and the protruding portion 300 are disposed on the light source bracket 400.
  • the protruding portion 300 is a screw 310 fixed on the light source bracket 400. As shown in FIG. 2, a screw portion (not labeled) of the screw 310 is screwed to the light source bracket 400.
  • the nut portion (not shown) of the 310 is connected to the light incident surface 110 of the light guide plate 100.
  • the nut has an increased thickness and an enlarged area to maintain good surface contact with the light incident surface 110 of the light guide plate 100.
  • the protruding portion 300 may also be a clamping member that is clamped on the light source holder 400 or an overlay member or the like that is attached to the light source holder 400.
  • the backlight module 10 provided by the present invention has a protruding component, and the light-emitting surface 110 of the light-guiding plate 100 is effectively defined by the protruding component to effectively define the light source 200 and the light guide plate.
  • the distance between the light incident surfaces 110 of 100 is compared with the distance between the light emitting diodes and the light incident surface of the light guide plate in the prior art by the tolerances of the components such as the printed circuit board and the heat sink, the thermal expansion of the light guide plate, and the water swell.
  • the distance between the light source 200 and the light incident surface 110 of the light guide plate 100 in the present invention is limited only by the protruding element, which reduces the limiting factor and improves the assembly accuracy, thereby greatly optimizing the backlight mode.
  • the protruding member is in contact with the light guide plate 100 in a multi-point contact, and the mounting of the plug is omitted compared with the prior art, which reduces the production cost.
  • the present invention further provides a liquid crystal display device 1 including the backlight module 10 and the liquid crystal display panel 20, and the backlight module 10 is disposed adjacent to the liquid crystal display panel 20.

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

Description

液晶显示装置及其背光模组
【技术领域】
本发明涉及显示器技术领域， 特别是涉及一种液晶显示装置及其背光模组。 【背景技术】
液晶显示装置一般包括叠合设置的背光模组及液晶显示面板， 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。 发光二极管 （LED ) 作为典型的点光源装置， 往往作为关键零组件应用于背光模组。 其中较常用的 即是釆用多个发光二极管作为点光源阵列设置于印刷电路板 ( PCB )表面组成发 光二极管灯条（ Light Bar )。 该多个发光二极管在该印刷电路板的驱动作用下发 光， 进而形成条形线光源， 然后通过背光模组的导光板（LGP )改变光的出射方 向， 得到均匀的面光源。
发光二极管的发光面与导光板的厚度一般相近， 发光二极管与导光板的入 光面之间的距离会影响光线的耦合效率， 在现有技术中， 发光二极管与导光板 的入光面之间的距离由于印刷电路板和散热器等组件的公差、 导光板的热膨胀 及吸水膨胀等多种因素限定不当， 通常容易导致背光模组的光线耦合效率不佳。 【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， 以解决现有技术中液晶 显示装置的背光模组的光线耦合效率不佳的问题。
为解决上述技术问题， 本发明釆用的一个技术方案是： 提供一种背光模组， 该背光模组包括导光板和光源， 该导光板包括入光面， 该光源相邻该入光面设 置， 其中， 该背光模组进一步包括凸出部， 该凸出部抵接该入光面以限定该光 源与该入光面的间隔巨离。
根据本发明一优选实施例， 该光源包括多个点光源及与该多个点光源电性 连接的印刷电路板， 该凸出部包括多个凸出元件， 该多个凸出元件和该多个点 光源相互间隔设置。
根据本发明一优选实施例， 该多个凸出元件 4氏接该入光面。
根据本发明一优选实施例， 该背光模组进一步包括光源支架， 该光源和该 凸出部都设置于该光源支架上。
才艮据本发明一优选实施例， 该凸出部为固定在该光源支架上的螺丝。
根据本发明一优选实施例， 该凸出部为夹持在该光源支架上的夹持元件。 根据本发明一优选实施例， 该凸出部为贴设在该光源支架上的贴覆元件。 为解决上述技术问题， 本发明釆用的另一个技术方案是： 提供一种液晶显 示装置， 该液晶显示装置包括液晶显示面板和背光模组， 该背光模组相邻该液 晶显示面板设置， 该背光模组包括导光板和光源， 该导光板包括入光面， 该光 源相邻该入光面设置， 其中， 该背光模组进一步包括凸出部， 该凸出部抵接该 入光面以限定该光源与该入光面的间隔 巨离。
为解决上述技术问题， 本发明釆用的另一个技术方案是： 提供一种背光模 组， 该背光模组包括导光板和多个发光元件， 该导光板包括入光面， 该多个发 光元件与该入光面间隔设置， 其中， 该背光模组进一步包括多个凸出元件， 该 多个凸出元件和该多个发光元件相互间隔设置， 并 4氏接该入光面。
为解决上述技术问题， 本发明釆用的另一个技术方案是： 提供一种液晶显 示装置， 该液晶显示包括液晶显示面板和背光模组， 该背光模组相邻该液晶显 示面板设置， 该背光模组包括导光板和多个发光元件， 该导光板包括入光面， 该多个发光元件与该入光面间隔设置， 其中， 该背光模组进一步包括多个凸出 元件， 该多个凸出元件和该多个发光元件相互间隔设置， 并 4氏接该入光面。
本发明的有益效果是： 区别于现有技术的情况， 本发明提供的背光模组具 光模组的光线耦合效率。
【附图说明】
图 1为本发明背光模组一优选实施例的截面结构示意图；
图 2为图 1中所示背光模组的正面示意图； 以及
图 3为本发明液晶显示装置一优选实施例的简化结构示意图。
【具体实施方式】
下面结合附图和实施例对本发明进行详细说明。
请参阅图 1 , 本发明提供了一种新型的背光模组 10, 该背光模组 10包括导 光板 100、 光源 200以及凸出部 300。
其中， 该导光板 100包括入光面 110 , 该光源 200相邻该入光面 110设置， 该凸出部 3004氐接该入光面 110以限定该光源 200与该入光面 110的间隔距离。
具体而言， 请一并参阅图 2 , 该光源 200包括多个点光源 210 (例如多个发 光二极管）及与该多个点光源 210电性连接的印刷电路板 220, 该凸出部 300包 括多个凸出元件， 如螺丝 310 , 该多个凸出元件和该多个点光源 210相互间隔设 置， 该多个凸出元件 4氐接该入光面 110。
在本发明实施例中， 该背光模组 10进一步包括光源支架 400, 如图 1和图 2所示， 该光源 200和该凸出部 300都设置于该光源支架 400上。
在本发明实施例中， 该凸出部 300为固定在该光源支架 400上的螺丝 310, 如图 2所示， 该螺丝 310的螺杆部分（未标示）螺接于该光源支架 400 , 该螺丝 310的螺帽部分（未标示） 4氏接该导光板 100的入光面 110。 在优选实施例中， 该螺帽具有加大的厚度并具有加大的面积，以便于与该导光板 100的入光面 110 保持良好面接触。在其他实施例中， 该凸出部 300也可为夹持在该光源支架 400 上的夹持元件或贴设在该光源支架 400上的贴覆元件等。
综上所述， 本领域技术人员容易理解， 本发明提供的背光模组 10具有凸出 元件， 通过该凸出元件抵接该导光板 100的入光面 110有效地限定了光源 200 与导光板 100的入光面 110之间的距离， 相较于现有技术中发光二极管与导光 板的入光面之间的距离由印刷电路板和散热器等组件的公差、 导光板的热膨胀 及吸水膨胀等多个因素限定， 本发明中光源 200与导光板 100的入光面 110之 间的距离仅通过该凸出元件来限定， 减少了限定因素， 提高了装配准确度， 从 而大大优化了背光模组 10的光线耦合效率。 此外， 凸出元件与导光板 100多点 接触， 其安装相较于现有技术省略了安装插销， 降低了生产成本。
请参阅图 3 , 本发明还提供一种液晶显示装置 1 , 该液晶显示装置 1包括上 述的背光模组 10和液晶显示面板 20,该背光模组 10相邻该液晶显示面板 20设 置。
以上所述仅为本发明的示例性实施例， 并非因此限制本发明的专利保护范 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

权 利 要求
1、 一种背光模组， 包括导光板和光源， 所述导光板包括入光面， 所述光源 相邻所述入光面设置， 其特征在于： 所述背光模组进一步包括凸出部， 所述凸
2、 根据权利要求 1所述的背光模组， 其特征在于： 所述光源包括多个点光 源及与所述多个点光源电性连接的印刷电路板， 所述凸出部包括多个凸出元件， 所述多个凸出元件和所述多个点光源相互间隔设置。
3、 根据权利要求 2所述的背光模组， 其特征在于： 所述多个凸出元件抵接 所述入光面。
4、 根据权利要求 1所述的背光模组， 其特征在于： 所述背光模组进一步包 括光源支架， 所述光源和所述凸出部都设置于所述光源支架上。
5、 根据权利要求 4所述的背光模组， 其特征在于： 所述凸出部为固定在所 述光源支架上的螺丝。
6、 根据权利要求 4所述的背光模组， 其特征在于： 所述凸出部为夹持在所 述光源支架上的夹持元件。
7、 根据权利要求 4所述的背光模组， 其特征在于： 所述凸出部为贴设在所 述光源支架上的贴覆元件。
8、 一种液晶显示装置， 包括液晶显示面板和背光模组， 所述背光模组相邻 所述液晶显示面板设置， 所述背光模组包括导光板和光源， 所述导光板包括入 光面， 所述光源相邻所述入光面设置， 其特征在于： 所述背光模组进一步包括 凸出部， 所述凸出部 4氐接所述入光面以限定所述光源与所述入光面的间隔巨离。
9、 根据权利要求 8所述的液晶显示装置， 其特征在于： 所述光源包括多个 点光源及与所述多个点光源电性连接的印刷电路板， 所述凸出部包括多个凸出 元件， 所述多个凸出元件和所述多个点光源相互间隔设置。
10、 根据权利要求 9 所述的液晶显示装置， 其特征在于： 所述多个凸出元 件抵接所述入光面。
11、 根据权利要求 8 所述的液晶显示装置， 其特征在于： 所述背光模组进 一步包括光源支架， 所述光源和所述凸出部都设置于所述光源支架上。
12、 根据权利要求 11所述的液晶显示装置， 其特征在于： 所述凸出部为固 定在所述光源支架上的螺丝。
13、 根据权利要求 11所述的液晶显示装置， 其特征在于： 所述凸出部为夹 持在所述光源支架上的夹持元件。
14、 根据权利要求 11所述的液晶显示装置， 其特征在于： 所述凸出部为贴 设在所述光源支架上的贴覆元件。
15、 一种背光模组， 包括导光板和多个发光元件， 所述导光板包括入光面， 所述多个发光元件与所述入光面间隔设置， 其特征在于： 所述背光模组进一步 包括多个凸出元件， 所述多个凸出元件和所述多个发光元件相互间隔设置， 并 抵接所述入光面。
16、 一种液晶显示装置， 包括液晶显示面板和背光模组， 所述背光模组相 邻所述液晶显示面板设置， 所述背光模组包括导光板和多个发光元件， 所述导 光板包括入光面， 所述多个发光元件与所述入光面间隔设置， 其特征在于： 所 述背光模组进一步包括多个凸出元件， 所述多个凸出元件和所述多个发光元件 相互间隔设置， 并抵接所述入光面。
PCT/CN2011/075129 2011-03-31 2011-06-01 液晶显示装置及其背光模组 WO2012129840A1 (zh)

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CN103851420A (zh) * 2012-12-07 2014-06-11 苏州璨宇光学有限公司 背光模组
CN103196082B (zh) * 2013-04-15 2015-11-25 深圳市华星光电技术有限公司 背光模组及液晶显示器
CN104865748A (zh) * 2015-06-02 2015-08-26 武汉华星光电技术有限公司 背光模块及具有该背光模块的液晶显示器
CN105889814A (zh) * 2015-11-13 2016-08-24 乐视致新电子科技（天津）有限公司 一种led灯组、背光模组及显示设备
CN114924439A (zh) * 2022-03-16 2022-08-19 惠科股份有限公司 背光模组和显示面板

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