WO2013189116A1 - 直下式的背光模块及包括其的液晶显示器 - Google Patents

直下式的背光模块及包括其的液晶显示器 Download PDF

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Publication number
WO2013189116A1
WO2013189116A1 PCT/CN2012/079567 CN2012079567W WO2013189116A1 WO 2013189116 A1 WO2013189116 A1 WO 2013189116A1 CN 2012079567 W CN2012079567 W CN 2012079567W WO 2013189116 A1 WO2013189116 A1 WO 2013189116A1
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WIPO (PCT)
Prior art keywords
bottom plate
support structure
plate
height
distance
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Application number
PCT/CN2012/079567
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English (en)
French (fr)
Inventor
张光耀
苏赞加
Original Assignee
深圳市华星光电技术有限公司
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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 US13/639,484 priority Critical patent/US8777438B2/en
Publication of WO2013189116A1 publication Critical patent/WO2013189116A1/zh

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Classifications

    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity

Definitions

  • the present invention relates to a direct type backlight module and a liquid crystal display using the same according to the direct type backlight module, and more particularly to a support structure having a shadow reducing effect. Background technique
  • LEDs Light-Emitting Diodes
  • the diffusion plate needs to have a supporting structure to prevent deformation caused by thermal expansion and contraction and oscillation during transportation, causing taste problems or damaging the LED (when the cavity height is low) ).
  • FIG. 1 is a partial structural diagram of the existing direct type backlight module.
  • the backlight module 9 includes: an optical die 940, a diffuser 960, a bottom plate 910, a plurality of LEDs 920, and a plurality of support structures 930.
  • FIG. 1 only shows two LEDs 920 and a support structure 930. .
  • the optical plate 940 is disposed above the diffusion plate 960; the bottom plate 910 is disposed under the diffusion plate 960; the light emitting diode 920 is disposed between the diffusion plate 960 and the bottom plate 910; the support structure 930 is disposed between the diffusion plate 960 and the bottom plate 910, and One end is fixed to the bottom plate 910, and the other end is connected to the diffusion plate 960.
  • the black line 8 in the figure is a bat-scattering type light-emitting diode having different luminous intensity ratios at different angles, and it can be seen from Fig. 3 that the intensity of light on both sides of the light-emitting diode is stronger than the middle.
  • the LED 920 when the LED 920 emits light, it emits light in the form of a bat scattering light. When the light passes through the supporting structure 930, the light is blocked by the supporting structure 930 and cannot penetrate, so on the diffusing plate 960. A shadow 950 will be produced.
  • the object of the present invention is to overcome the problem of the support structure of the existing backlight module, causing a dark spot on the diffusion plate, and to provide a novel backlight module, and a technical problem to be solved is that it can be solved because the support structure is The path of the light, thus creating a shadow on the diffuser, seriously affects the quality of the picture.
  • a secondary object of the present invention is to overcome the problem that the support structure of the backlight module in the conventional liquid crystal display has a dark spot on the diffusion plate, and to provide a novel backlight module, and a technical problem to be solved is that it can be solved. Because of the path of the supporting structure to the light, shadows are generated on the diffusing plate, which seriously affects the quality of the picture.
  • the direct type backlight module of the present invention comprises: an optical die; a diffuser plate carrying the optical film; a bottom plate disposed under the diffuser; a plurality of light emitting diodes, Between the diffusion plate and the bottom plate; and a plurality of support structures disposed between the diffusion plate and the bottom plate and fixed to the bottom plate, and each of the support structures is disposed between the two adjacent light-emitting diodes. And the height of each of the support structures is less than the distance between the bottom plate and the diffuser plate.
  • the distance from the bottom plate to the diffusion plate is a cavity height
  • the distance from the bottom plate to the top end of the support structure is a support structure height
  • the distance from the support structure to the light emitting diode is a distance S
  • the height of the support structure and the spacing S are required to satisfy (-) XS/H S ⁇ 3.
  • the surface of the support structure is a polished surface, a frosted surface, a reflective surface or a scattering surface.
  • the cross section of the support structure is circular, elliptical, regular polygon, irregular polygon or zigzag.
  • the support structure is a pyramid, a cone, a cylinder or a prism.
  • the liquid crystal display comprises: a liquid crystal panel; a direct backlight module for providing a light source to the liquid crystal panel, comprising: an optical die; a diffusion plate carrying the optical film a bottom plate disposed under the diffusing plate; a plurality of light emitting diodes disposed between the diffusing plate and the bottom plate; and a plurality of supporting structures disposed between the diffusing plate and the bottom plate and fixed to the bottom plate And each of the supporting structures is disposed between two adjacent of the light emitting diodes, and a height of each of the supporting structures is smaller than a distance between the bottom plate and the diffusing plate.
  • the surface of the support structure is a polished surface, a frosted surface, a reflective surface or a scattering surface.
  • the cross section of the support structure is circular, elliptical, regular polygonal, irregular polygonal or zigzag.
  • the support structure is a pyramid, a cone, a cylinder or a prism.
  • the direct type backlight module of the present invention and the liquid crystal display using the direct type backlight module have the effect of shortening the height of the support structure, so that there is a space between the support structure and the optical die, and the light emitting diode is provided. The emitted light is penetrated between the support structure and the diffuser plate, thereby improving the shadow problem on the diffuser plate.
  • FIG. 1 is a partial structural view of a conventional direct type backlight module
  • FIG. 2 is a partial structural view of a conventional direct type backlight module when the light emitting diode emits light
  • 3 is a light distribution graph of a light emitting diode plus a secondary lens
  • FIG. 4 is a partial cross-sectional view showing a direct type backlight module according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a liquid crystal display according to an embodiment of the present invention. detailed description
  • the direct type backlight module 1 includes an optical die 140, a diffusion plate 160, a bottom plate 110, a plurality of light emitting diodes 120, and a plurality of support structures 130.
  • FIG. 4 only shows two illuminations. Diode 120 and a support structure 130.
  • the optical plate 140 is disposed above the diffusion plate 160; the bottom plate 110 is disposed under the diffusion plate 160; the light emitting diode 120 is disposed between the diffusion plate 160 and the bottom plate 110, and is fixed on the bottom plate 110; the support structure 130 is disposed on the diffusion
  • the board 160 is disposed between the board 160 and the bottom board 110 and is fixed on the bottom board 110.
  • Each support structure 130 is disposed between two adjacent LEDs 120, and the height of each support structure 130 is smaller than the height between the bottom board 110 and the diffuser board 160. distance.
  • the distance from the bottom plate 110 to the diffuser plate 160 is defined as a cavity height from the bottom plate 110 to the top end of the support structure 130 is defined as a support structure height, and the distance from the support structure 130 to the light emitting diode 120 is defined as a distance S, Where the cavity height, the support structure height and the spacing S, the relationship of the above three is required to satisfy (-) XS/H S ⁇ 3. 5 mm.
  • the light emitting diode 120 emits light, the light can pass directly through the support structure 130, so that the shadow 150 on the diffuser plate 160 becomes light.
  • the optical film 140 in the above is sequentially a 0 degree prism sheet, a 90 degree prism sheet, and a brightness enhancement sheet, and is not limited thereto.
  • the bottom plate 110 in the above may be a reflection sheet to increase the efficiency of use of light.
  • the medium support structure 130 is made of a hard material such as a hard material such as an acrylic material, a plastic material or a metal material.
  • the surface of the support structure 130 can be a polished surface, a frosted surface, a reflective surface or a scattering surface.
  • the cross-section of the support structure 130 is circular, elliptical, regular, irregular, or zigzag.
  • the shape of the support structure 130 is a pyramid, a cone, a cylinder or a prism.
  • FIG. 5 is a schematic diagram of a liquid crystal display according to an embodiment of the present invention.
  • the liquid crystal display 2 includes a liquid crystal panel 210 and a direct-lit backlight module 220.
  • the direct type backlight module 220 is configured to provide a light source to the liquid crystal panel 210 to display an image.
  • the direct type backlight module 220 is the direct type back disclosed in the foregoing embodiment of the present invention.
  • the liquid crystal display 2 further includes components such as a plastic frame, a front frame, a back plate, and a heat sink.
  • the above components and related structures are prior art, and are not described herein.
  • the direct type backlight module of the present invention and the liquid crystal display using the direct type backlight module have the effect of shortening the height of the support structure, so that there is a space between the support structure and the optical die, so that the light emitting diode emits The light penetrates between the support structure and the optical die, thereby improving the shadow problem on the optical die.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

一种直下式背光模块（1）及包括其的液晶显示器（2），包括：一光学膜片（140）；一扩散板（160），承载此光学膜片（140）；一底板（110），设置于此扩散板（160）的下方；多数个发光二极管（120），设置于此扩散板（160）与此底板（110）之间；以及多数个支撑结构（130），设置于此扩散板（160）与此底板（110）之间并固定于此底板（110）上，且每一此支撑结构（130）设置于两相邻此发光二极管（120）之间，以及每一此支撑结构（130）的高度小于底板（110）到扩散板（160）之间的距离。该直下式背光模块（1）及该液晶显示器（2）可改善在扩散板（160）上的阴影问题。

Description

直下式的背光模块及包括其的液晶显示器 技术领域
本发明是有关于一种直下式背光模块及其使用此直下式背光模块的液晶显示器， 特别 是有关于一种具有可减少阴影的支撑结构。 背景技术
近年来， 使用发光二极管（Light-Emitting Diode, LED)的直下式背光模块具有容易 于区域调光、 均齐度高、 无汞污染等优点受到广泛重视。 直下式发光二极管背光模块有两 种常见的实现形式， 一种为直接采用表面黏贴型发光二极管 （通常需要的发光二极管数量 较多）， 第二种为表面黏贴型发光二极管搭配二次透镜 （可减少发光二极管的颗数）。 但是 无论采用哪种实现形式， 扩散板都需要有支撑结构来防止其由于热涨冷縮和运输过程中的 振荡而引起的形变， 造成品味问题或者击伤发光二极管 （当腔体高度较低时）。
请参阅图 1， 为现有的直下式背光模块部分结构图。背光模块 9包括： 一光学模片 940、 一扩散板 960、 一底板 910、 多数个发光二极管 920及多数个支撑结构 930， 为方便说明， 图 1只显示两个发光二极管 920及一个支撑结构 930。
扩散板 960上方承载此光学膜片 940; 底板 910设置于扩散板 960的下方； 发光二极 管 920设置于扩散板 960与底板 910之间； 支撑结构 930设置于扩散板 960与底板 910之 间， 且一端固定于底板 910上， 另一端与扩散板 960连接。
请参阅图 3， 为发光二极管加上二次透镜的配光曲线图。 图中的黑线 8为蝙蝠散射光 型的发光二极管， 在不同的角度有不同的发光强度比， 且从图 3中可看出， 发光二极管两 侧光的强度比中间还强。
请参阅图 2， 当发光二极管 920发光时， 是以蝙蝠散射光型的方式发光， 当光线经过 支撑结构 930时， 光线会被支撑结构 930档住， 而无法穿透， 因此在扩散板 960上会产生 阴影 950。
因此， 便需要提供一种背光模块及其显示器， 使支撑结构不会在扩散板上产生阴影的 装置， 以解决前述的问题。 发明内容
本发明的目的在于， 克服现有的背光模块的支撑结构， 造成在扩散板上产生暗点的问 题， 而提供一种新型背光模块， 所要解决一技术问题是使其可以解决因为支撑结构档到光 线的路径， 因而在扩散板上产生阴影， 严重影响画面的质量。 本发明的次要目的在于， 克服现有的液晶显示器中的背光模块的支撑结构， 在扩散板 上产生暗点的问题， 而提供一种新型背光模块， 所要解决一技术问题是使其可以解决因为 支撑结构档到光线的路径， 因而在扩散板上产生阴影， 严重影响画面的质量。
为达成上述提供的目的， 本发明提出的直下式背光模块， 包括： 一光学模片； 一扩散 板， 承载此光学膜片； 一底板， 设置于此扩散板的下方； 多数个发光二极管， 设置于此扩 散板与此底板之间； 以及多数个支撑结构， 设置于此扩散板与此底板之间并固定于此底板 上， 且每一此支撑结构设置于两相邻此发光二极管之间， 以及每一此支撑结构的高度小于 底板到扩散板之间的距离。
前述的直下式背光模块， 从此底板到此扩散板的距离为一腔体高度 ， 从此底板到此 支撑结构的顶端的距离为一支撑结构高度 ， 从此支撑结构到此发光二极管的距离为一间 距 S其中此腔体高度 此支撑结构高度 以及此间距 S需满足 ( - ) X S/HS≥3. 5毫米 前述的直下式背光模块， 此支撑结构的表面为抛光面、 磨砂面、 反射面或散射面。 前述的直下式背光模块， 此支撑结构的横切面为圆形、 椭圆形、 规则多边形、 不规则 多边形或锯齿形。
前述的直下式背光模块， 此支撑结构为角锥体、 圆锥体、 圆柱体或稜柱体。
为达成上述提供的目的， 本发明提出的液晶显示器， 包括： 一液晶面板； 一直下式背 光模块， 用以提供光源给此液晶面板， 包括： 一光学模片； 一扩散板， 承载此光学膜片； 一底板， 设置于此扩散板的下方； 多数个发光二极管， 设置于此扩散板与此底板之间； 以 及多数个支撑结构， 设置于此扩散板与此底板之间并固定于此底板上， 且每一此支撑结构 设置于两相邻此发光二极管之间， 以及每一此支撑结构的高度小于底板到扩散板之间的距 离。
前述的液晶显示器， 此支撑结构的表面为抛光面、 磨砂面、 反射面或散射面。
前述的液晶显示器， 此支撑结构的横切面为圆形、 椭圆形、 规则多边形、 不规则多边 形或锯齿形。
前述的液晶显示器， 此支撑结构为角锥体、 圆锥体、 圆柱体或稜柱体。
综上所述， 本发明的直下式背光模块及其使用此直下式背光模块的液晶显示器其效果 在于， 利用縮短支撑结构的高度， 使支撑结构与光学模片之间有一空间， 让发光二极管所 发出的光由支撑结构与扩散板之间穿透， 进而改善在扩散板上的阴影问题。
上述说明仅是本发明技术方案的概述， 为了能够更清楚了解本发明的技术手段， 并可 依照说明书的内容予以实施， 以下以本发明的较佳实施例并配合附图详细说明如后。 附图说明
图 1是现有的直下式背光模块部分结构图；
图 2是当发光二极管发光时现有的直下式背光模块部分结构图；
图 3是发光二极管加上二次透镜的配光曲线图；
图 4是本发明实施例的直下式背光模块部份剖面图； 以及
图 5是本发明实施例的液晶显示器示意图。 具体实施方式
以下结合附图所示的较佳实施例作进一步详述。
图 4为本发明实施例的直下式背光模块部份剖面图。 如图 4所示， 直下式背光模块 1 包括一光学模片 140、 一扩散板 160、 一底板 110、 多数个发光二极管 120及多数个支撑结 构 130， 为方便说明， 图 4只显示两个发光二极管 120及一个支撑结构 130。
扩散板 160的上方承载此光学膜片 140; 底板 110设置于此扩散板 160的下方； 发光 二极管 120设置于扩散板 160与底板 110之间， 并固定于底板 110上； 支撑结构 130设置 于扩散板 160与底板 110之间并固定于底板 110上， 且每一支撑结构 130设置于两相邻的 发光二极管 120之间， 以及每一支撑结构 130的高度小于底板 110到扩散板 160之间的距 离。
上述中底板 110到扩散板 160的距离定义为一腔体高度 从底板 110到支撑结构 130 的顶端的距离定义为一支撑结构高度 ， 从支撑结构 130到发光二极管 120的距离定义为 一间距 S， 其中腔体高度 、 支撑结构高度 以及间距 S， 上述三者的关系需满足 ( - ) X S/HS ^ 3. 5毫米。 当发光二极管 120发光时， 光线可以直接穿过支撑结构 130， 因此在扩 散板 160的阴影 150就会变淡。
上述中的光学模片 140由下而上依序为 0度棱镜片、 90度棱镜片及增光片， 在此则不 以为限。 上述中的底板 110可为一反射片， 增加光线的使用效率。 上述中支撑结构 130的 材质为硬质材料， 例如压克力材料、 塑胶材料或金属材料等硬质材料。 支撑结构 130的表 面可为抛光面、 磨砂面、 反射面或散射面。 支撑结构 130的横切面为圆形、 椭圆形、 规则 多边形、 不规则多边形或锯齿形。 支撑结构 130的外形为角锥体、 圆锥体、 圆柱体或稜柱 体。
图 5为本发明实施例的液晶显示器示意图。 液晶显示器 2包括一液晶面板 210及一直 下式背光模块 220。 此直下式背光模块 220用以提供光源至此液晶面板 210， 以显示一影 像。 在本发明实施例中， 此直下式背光模块 220为前述中本发明施实例所揭露的直下式背 光模块 220。 其中此液晶显示器 2还包括胶框、 前框、 背板以及散热片等元件， 但上述的 元件以及相关结构为现有的技术， 在此则不于赘述。
由上述可知， 本发明的直下式背光模块及其使用此直下式背光模块的液晶显示器其效 果在于， 利用縮短支撑结构的高度， 使支撑结构与光学模片之间有一空间， 让发光二极管 所发出的光由支撑结构与光学模片之间穿透， 进而改善在光学模片上的阴影问题。
以上， 仅为本发明的较佳实施例， 意在进一步说明本发明， 而非对其进行限定。 凡根 据上述的文字和附图所公开的内容进行的简单的替换， 都在本专利的权利保护范围之列。

Claims

权利要求
1.一种直下式背光模块， 包括：
一光学模片；
一扩散板， 承载所述的光学膜片；
一底板， 设置于所述的扩散板的下方；
多数个发光二极管， 设置于所述的扩散板与所述的底板之间； 以及
多数个支撑结构， 设置于所述的扩散板与所述的底板之间并固定于所述的底板上， 且 每一所述的支撑结构设置于两相邻所述的发光二极管之间， 以及每一所述的支撑结构的高 度小于底板到扩散板之间的距离；
其中， 从所述的底板到所述的扩散板的距离为一腔体高度 ， 从所述的底板到所述的 支撑结构的顶端的距离为一支撑结构高度 ¾， 从所述的支撑结构到所述的发光二极管的距 离为一间距 S， 其中所述的腔体高度 、 所述的支撑结构高度 ¾以及所述的间距 S需满足 (Hc-Hs) X S/Hs≥3. 5 毫米， 所述的支撑结构的表面为抛光面、 磨砂面、 反射面或散射面， 所述的支撑结构的横切面为圆形、 椭圆形、 规则多边形、 不规则多边形或锯齿形。
2.—种直下式背光模块， 包括：
一光学模片；
一扩散板， 承载所述的光学膜片；
一底板， 设置于所述的扩散板的下方；
多数个发光二极管， 设置于所述的扩散板与所述的底板之间； 以及
多数个支撑结构， 设置于所述的扩散板与所述的底板之间并固定于所述的底板上， 且 每一所述的支撑结构设置于两相邻所述的发光二极管之间， 以及每一所述的支撑结构的高 度小于底板到扩散板之间的距离。
3.如权利要求 2所述的直下式背光模块， 其中， 从所述的底板到所述的扩散板的距离 为一腔体高度 ， 从所述的底板到所述的支撑结构的顶端的距离为一支撑结构高度 ， 从 所述的支撑结构到所述的发光二极管的距离为一间距 S， 其中所述的腔体高度 、 所述的 支撑结构高度 以及所述的间距 S需满足 ( - ) X S/HS≥3. 5毫米。
4.如权利要求 3所述的直下式背光模块， 其中， 所述的支撑结构的表面为抛光面、 磨 砂面、 反射面或散射面。
5.如权利要求 3所述的直下式背光模块， 其中， 所述的支撑结构的横切面为圆形、 椭 圆形、 规则多边形、 不规则多边形或锯齿形。
6.如权利要求 3所述的直下式背光模块， 其中， 所述的支撑结构为角锥体、 圆锥体、 圆柱体或稜柱体。
7.—种液晶显示器， 其中， 包括：
一液晶面板； 以及
一直下式背光模块， 用以提供光源给所述的液晶面板， 包括：
一光学模片；
一扩散板， 承载所述的光学膜片；
一底板， 设置于所述的扩散板的下方；
多数个发光二极管， 设置于所述的扩散板与所述的底板之间； 以及
多数个支撑结构， 设置于所述的扩散板与所述的底板之间并固定于所述的底板 上， 且每一所述的支撑结构设置于两相邻所述的发光二极管之间， 以及每一所述的支 撑结构的高度小于底板到扩散板之间的距离。
8.如权利要求 7所述的液晶显示器， 其中， 从所述的底板到所述的扩散板的距离为一 腔体高度 ， 从所述的底板到所述的支撑结构的顶端的距离为一支撑结构高度 ， 从所述 的支撑结构到所述的发光二极管的距离为一间距 S， 其中所述的腔体高度 、 所述的支撑 结构高度 ¾以及所述的间距 S需满足 ( -¾) X S/HS≥3. 5毫米。
9.如权利要求 8所述的液晶显示器，其中， 所述的支撑结构的表面为抛光面、磨砂面、 反射面或散射面。
10.如权利要求 8所述的液晶显示器， 其中， 所述的支撑结构的横切面为圆形、 椭圆 形、 规则多边形、 不规则多边形或锯齿形。
11.如权利要求 8 所述的液晶显示器， 其中， 所述的支撑结构为角锥体、 圆锥体、 圆 柱体或稜柱体。
PCT/CN2012/079567 2012-06-20 2012-08-02 直下式的背光模块及包括其的液晶显示器 WO2013189116A1 (zh)

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