WO2013189115A1 - 直下式的背光模块及其液晶显示器 - Google Patents

直下式的背光模块及其液晶显示器 Download PDF

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Publication number
WO2013189115A1
WO2013189115A1 PCT/CN2012/079476 CN2012079476W WO2013189115A1 WO 2013189115 A1 WO2013189115 A1 WO 2013189115A1 CN 2012079476 W CN2012079476 W CN 2012079476W WO 2013189115 A1 WO2013189115 A1 WO 2013189115A1
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WO
WIPO (PCT)
Prior art keywords
bottom plate
light
plate
backlight module
support structure
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2012/079476
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English (en)
French (fr)
Inventor
胡哲彰
张光耀
苏赞加
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
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
Priority to US13/811,172 priority Critical patent/US9063367B2/en
Publication of WO2013189115A1 publication Critical patent/WO2013189115A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02F1/133606—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
    • 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

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 reduced shadow. 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 includes: an optical die 940, a diffuser 960, a bottom plate 910, a plurality of light emitting diodes 920, and a plurality of support structures 930.
  • FIG. 1 shows only two light emitting diodes 920 and one support structure 930.
  • the optical film 940 is disposed above the diffusion plate 950; 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; and the support structure 930 is disposed on 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.
  • a light distribution curve of the secondary lens is added to the light-emitting diode 920.
  • the black line 8 in the figure is a bat-scattering light-emitting diode, which has 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 when the LED emits 920, it emits light in the form of a bat scattering light.
  • the light passes through the support structure 930, the light is blocked by the support structure 930 and cannot penetrate, so on the diffusion 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 optical die, 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 on the bottom plate, each of the support structures includes: a top portion including a light transmissive region, The light transmitting region penetrates the light emitted by the LED; and a bottom portion is fixed to the bottom plate.
  • the volume ratio of the light transmitting region of the supporting structure accounts for more than 20% of the volume of the top portion.
  • the top of the support structure is a spiral structure.
  • the top of the support structure is a mesh structure.
  • the top and the bottom are integrally formed.
  • the liquid crystal display of the present invention includes: 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 An 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
  • Each of the supporting structures on the bottom plate comprises: a top portion having a top body and a light transmissive region having a light passing through the light emitting diode; and a bottom portion fixed to the bottom plate.
  • the volume ratio of the light transmitting region of the support structure accounts for more than 20% of the volume of the top portion.
  • the top of the support structure is a spiral structure.
  • the top of the support structure is a mesh structure.
  • the top and the bottom are made of the same material and integrally formed.
  • the direct type backlight module of the present invention and the liquid crystal display thereof have the effect of utilizing the light transmitting area of the supporting structure to penetrate the light emitted by the light emitting diode, thereby improving the shadow on the diffusing 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
  • 4 is a partial cross-sectional view showing a direct type backlight module according to a first embodiment of the present invention
  • Figure 5 is a partial cross-sectional view showing a direct type backlight module of a second embodiment of the present invention.
  • Figure 6 is a partial cross-sectional view showing a direct type backlight module of a third embodiment of the present invention.
  • FIG. 7 is a schematic view of a liquid crystal display according to an embodiment of the present invention. detailed description
  • FIG. 4 is a partial cross-sectional view showing a direct type backlight module according to a first embodiment of the present invention.
  • the direct-lit backlight module 1 includes an optical die 140, a diffuser 160, a bottom plate 110, a plurality of LEDs 120, and a plurality of support structures 130.
  • FIG. 4 only shows two illuminations.
  • the support structure 130 includes a top portion 131 and a bottom portion 132.
  • 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 plate Between the plate 160 and the bottom plate 110, the bottom 132 of the support structure 130 is fixed to the bottom plate 110.
  • the top portion 131 of the support structure 130 has a spiral structure and has a light transmitting region 133.
  • the light transmitting region 133 can penetrate the light emitted by the light emitting diode 120, and the shadow 150 on the diffusing plate 160 is lightened, and the light transmitting region is lightened.
  • the volume ratio of 133 accounts for more than 20% of the volume of the top 131.
  • the optical film 140 is sequentially a 0-degree prism sheet, a 90-degree prism sheet, and a brightness enhancement sheet, but 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 top portion 131 of the middle support structure 130 may be a spring or a hard material of the same material as the bottom portion 132, such as a hard material such as an acrylic material, a plastic material or a metal material.
  • FIG. 5 is a partial cross-sectional view showing a direct type backlight module of a second embodiment of the present invention.
  • the direct-lit backlight module 2 includes an optical die 240, a diffuser plate 260, a bottom plate 210, a plurality of light-emitting diodes 220, and a plurality of support structures 230.
  • FIG. 5 only shows two light-emitting diodes. 220 and a support structure 230.
  • the support structure 230 includes a top portion 231 and a bottom portion 232.
  • the optical plate 240 is disposed above the diffuser plate 260; the bottom plate 210 is disposed under the diffuser plate 260; the light emitting diode 220 is disposed between the diffuser plate 260 and the bottom plate 210, and is fixed on the bottom plate 210; the support structure 230 is disposed on the diffusion plate Between the plate 260 and the bottom plate 210, the bottom 232 of the support structure 230 is fixed on the bottom plate 210.
  • the top portion 231 of the support structure 230 has a mesh structure and has a light transmitting area 233. The light transmitting area 233 can be used by the light emitting diode 220.
  • the emitted light penetrates, and the shadow 250 on the diffusion plate 260 is made lighter, and the volume ratio of the light-transmitting region 233 is more than 20% of the volume of the top portion 231.
  • the optical film 240 is sequentially a 0-degree prism sheet, a 90-degree prism sheet, and a brightness enhancement sheet, but is not limited thereto.
  • the bottom plate 210 in the above may be a reflective sheet to increase the efficiency of use of light.
  • the top portion 231 of the middle support structure 230 may be a hard material of the same material as the bottom portion 232, such as a hard material such as an acrylic material, a plastic material, or a metal material.
  • FIG. 6 is a partial cross-sectional view showing a direct type backlight module of a third embodiment of the present invention.
  • the direct type backlight module 3 includes an optical die 340, a diffusion plate 360, a bottom plate 310, a plurality of light emitting diodes 320, and a plurality of support structures 330.
  • FIG. 6 only shows two illuminations.
  • the support structure 330 includes a top portion 331 and a bottom portion 332.
  • the optical plate 340 is disposed above the diffuser plate 360; the bottom plate 310 is disposed under the diffuser plate 360; the light emitting diode 320 is disposed between the diffuser plate 360 and the bottom plate 310, and is fixed on the bottom plate 310; the support structure 330 is disposed on the diffusion plate The bottom portion 332 of the support structure 330 is fixed on the bottom plate 310, and the top portion 331 of the support structure 330 is three thin columns for supporting the optical film 340.
  • the light transmitting area 333 can penetrate the light emitted by the light emitting diode 320, so the shadow 350 on the diffusing plate 360 becomes lighter, and the volume ratio of the light transmitting area 333 More than 20% of the volume of the top 331.
  • the optical film 340 is sequentially a 0-degree prism sheet, a 90-degree prism sheet, and a brightness enhancement sheet, but is not limited thereto.
  • the bottom plate 310 in the above may be a reflection sheet to increase the efficiency of use of light.
  • the top portion 331 of the middle support structure 330 may be a hard material of the same material as the bottom portion 332, such as a hard material such as an acrylic material, a plastic material or a metal material.
  • FIG. 7 is a schematic diagram of a liquid crystal display according to an embodiment of the present invention.
  • the liquid crystal display 4 includes a liquid crystal panel 440 and a direct type backlight module 420.
  • the direct type backlight module 420 is configured to provide a light source to the liquid crystal panel 440 to display an image.
  • the direct type backlight module 420 is the direct type backlight module 420 disclosed in one of the first embodiment, the second embodiment or the third embodiment.
  • the liquid crystal display 4 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 utilizing the light transmission area of the support structure to penetrate the light emitted by the light emitting diode, thereby improving the diffusion plate. The shadow.

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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)

Description

直下式的背光模块及其液晶显示器
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 950的上方承载所述的光学膜片 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 920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， 当发光二极管发光 920 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， 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， 造成在光学模片上产生暗点 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在 此底板上， 每一此支撑结构包括： 一顶部， 包括一透光区， 此透光区使此发光二极管所 发出的光穿透； 以及一底部， 固定于底板上。
前述的直下式背光模块， 此支撑结构的此透光区的体积比例占此顶部的体积 20%以 上。
前述的直下式背光模块， 此支撑结构的此顶部为螺旋结构。
前述的直下式背光模块， 此支撑结构的此顶部为网状结构。
前述的直下式背光模块， 此顶部及此底部为一体成形。
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， 承载所述的光 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在此底板上， 每一 此支撑结构包括： 一顶部， 具有一顶部主体及一透光区， 此透光区具有使此发光二极管 所发出的光穿透； 以及一底部， 固定于底板上。
前述的液晶显示器， 此支撑结构的此透光区的体积比例占此顶部的体积的 20%以 上。
前述的液晶显示器， 此支撑结构的此顶部为螺旋结构。
前述的液晶显示器， 此支撑结构的此顶部为网状结构。
前述的液晶显示器， 此顶部及此底部为相同材质且一体成形。
综上所述， 本发明的直下式背光模块及其液晶显示器其效果在于， 利用支撑结构的 透光区， 使发光二极管所发出的光穿透， 进而改善在扩散板上的阴影。
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是本发明第 1实施例的直下式背光模块部份剖面图；
图 5是本发明第 2实施例的直下式背光模块部份剖面图；
图 6是本发明第 3实施例的直下式背光模块部份剖面图； 以及
图 7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为本发明第 1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。 其 中支撑结构 130包括一顶部 131及一底部 132。
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， 支撑结构 130的底部 132固定在此底板 110上。 支 撑结构 130的顶部 131为螺旋结构， 具有一透光区 133， 此透光区 133可使发光二极管 120所发出的光穿透， 而使扩散板 160上的阴影 150变淡， 且透光区 133的体积比例占 顶部 131的体积的 20%以上。
上述光学模片 140由下而上依序为 0度棱镜片、 90度棱镜片及增光片， 但不以此为 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的顶 部 131可为一弹簧或与底部 132相同材质的硬质材料， 例如压克力材料、 塑胶材料或金 属材料等硬质材料。
图 5为本发明第 2实施例的直下式背光模块部份剖面图。 如图 5所示， 直下式背光 模块 2包括一光学模片 240、 扩散板 260、 一底板 210、 多数个发光二极管 220及多数个 支撑结构 230， 为方便说明， 图 5只显示两个发光二极管 220及一个支撑结构 230。 其中 支撑结构 230包括一顶部 231及一底部 232。
扩散板 260的上方承载此光学膜片 240; 底板 210设置于此扩散板 260的下方； 发 光二极管 220设置于扩散板 260与底板 210之间， 并固定于底板 210上； 支撑结构 230 设置于扩散板 260与底板 210之间， 支撑结构 230的底部 232固定在此底板 210上， 支 撑结构 230的顶部 231为网状结构， 具有一透光区 233， 此透光区 233可使发光二极管 220所发出的光穿透， 而使扩散板 260上的阴影 250变淡， 且透光区 233的体积比例占 顶部 231的体积的 20%以上。 上述光学模片 240由下而上依序为 0度棱镜片、 90度棱镜 片及增光片， 但不以此为限。 上述中的底板 210 可为一反射片， 增加光线的使用效率。 上述中支撑结构 230 的顶部 231 可与底部 232 为相同材质的硬质材料， 例如压克力材 料、 塑胶材料或金属材料等硬质材料。
图 6为本发明第 3实施例的直下式背光模块部份剖面图。 如图 6所示， 直下式背光 模块 3包括一光学模片 340、 一扩散板 360、 一底板 310、 多数个发光二极管 320及多数 个支撑结构 330， 为方便说明， 图 6只显示两个发光二极管 320及一个支撑结构 330。 其 中支撑结构 330包括一顶部 331及一底部 332。
扩散板 360的上方承载此光学膜片 340; 底板 310设置于此扩散板 360的下方； 发 光二极管 320设置于扩散板 360与底板 310之间， 并固定于底板 310上； 支撑结构 330 设置于扩散板 360与底板 310之间， 且支撑结构 330的底部 332固定在底板 310上， 支 撑结构 330的顶部 331 为三根细柱， 用以顶住此光学膜片 340。 在三根细柱之间为一透 光区 333， 此透光区 333可使发光二极管 320所发出的光穿透， 因此在扩散板 360上的 阴影 350变淡， 且透光区 333的体积比例占顶部 331的体积的 20%以上。
上述光学模片 340由下而上依序为 0度棱镜片、 90度棱镜片及增光片， 但不以此为 限。 上述中的底板 310可为一反射片， 增加光线的使用效率。 上述中支撑结构 330的顶 部 331可与底部 332为相同材质的硬质材料， 例如压克力材料、 塑胶材料或金属材料等 硬质材料。
图 7为本发明实施例的液晶显示器示意图。 液晶显示器 4包括一液晶面板 440及一 直下式背光模块 420。 此直下式背光模块 420用以提供光源至此液晶面板 440， 以显示一 影像。 在本发明实施例中， 此直下式背光模块 420为前述中的第 1施实例、 第 2施实例 或第 3施实例的其中之一所揭露的直下式背光模块 420。 其中此液晶显示器 4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， 利用支撑结构的透光区， 使发光二极管所发出的光穿透， 进而改善在扩散板 上的阴影。
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
、 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在所述的底板 上， 每一所述的支撑结构包括：
一顶部， 包括一透光区， 所述的透光区使所述的发光二极管所发出的光穿 透； 以及
一底部， 固定于底板上；
其中， 所述的支撑结构的所述的透光区的体积比例占所述的顶部的体积的 20% 以上， 所述的支撑结构的所述的顶部为螺旋结构或网状结构， 所述的顶部及所述的 底部为一体成形。
、 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在所述的底板 上， 每一所述的支撑结构包括：
一顶部， 包括一透光区， 所述的透光区使所述的发光二极管所发出的光穿 透； 以及
一底部， 固定于底板上。
、 如权利要求 2所述的直下式背光模块， 其中， 所述的支撑结构的所述的透光区的体积 比例占所述的顶部的体积的 20%以上。
、 如权利要求 2所述的直下式背光模块， 其中， 所述的支撑结构的所述的顶部为螺旋结 构。
、 如权利要求 2所述的直下式背光模块， 其中， 所述的支撑结构的所述的顶部为网状结 构。
、 如权利要求 2所述的直下式背光模块， 其中， 所述的顶部及所述的底部为一体成形。 、 一种液晶显示器， 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在所述的底板 上， 每一所述的支撑结构包括：
一顶部， 具有一顶部主体及一透光区， 所述的透光区具有使所述的发光二 极管所发出的光穿透； 以及
一底部， 固定于底板上。
、 如权利要求 7所述的液晶显示器， 其中， 所述的支撑结构的所述的透光区的体积比例 占所述的顶部的体积的 20%以上。
、 如权利要求 7所述的液晶显示器， 其中， 所述的支撑结构的所述的顶部为螺旋结构。 、 如权利要求 7 所述的液晶显示器， 其中， 所述的支撑结构的所述的顶部为网状结 构。
1、 如权利要求 7 所述的液晶显示器， 其中， 所述的顶部及所述的底部为相同材质且一 体成形。
PCT/CN2012/079476 2012-06-19 2012-08-01 直下式的背光模块及其液晶显示器 Ceased WO2013189115A1 (zh)

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