WO2013143176A1 - 一种直下式背光模组及液晶显示装置 - Google Patents

一种直下式背光模组及液晶显示装置 Download PDF

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Publication number
WO2013143176A1
WO2013143176A1 PCT/CN2012/073922 CN2012073922W WO2013143176A1 WO 2013143176 A1 WO2013143176 A1 WO 2013143176A1 CN 2012073922 W CN2012073922 W CN 2012073922W WO 2013143176 A1 WO2013143176 A1 WO 2013143176A1
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WO
WIPO (PCT)
Prior art keywords
light source
holes
backlight module
type backlight
disposed
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PCT/CN2012/073922
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English (en)
French (fr)
Inventor
周革革
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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 US13/512,692 priority Critical patent/US9052544B2/en
Publication of WO2013143176A1 publication Critical patent/WO2013143176A1/zh

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    • 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
    • G02F1/133604—Direct backlight with lamps
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the present invention relates to the field of liquid crystal display, and in particular to a direct type backlight module and a liquid crystal display device.
  • flat-panel TVs basically replace CRT (Cathode Ray Tube, cathode ray tube display), wherein the LCD TV is a type of flat panel television.
  • CRT Cathode Ray Tube, cathode ray tube display
  • FIG. 1 is a schematic structural diagram of a direct type backlight module according to the prior art.
  • the direct type backlight module includes an optical film 101 , a diffusion plate 102 , and a light source 103 .
  • the optical film 101 in FIG. 1 is composed of a three-layer film, and the optical film 101 is disposed above the diffusion plate 102.
  • the diffusion plate 102 is disposed above the light source 103 and is separated from the light source 103 by a light mixing distance D.
  • the light mixing distance D between the light source 103 and the diffusing plate 102 needs to be large enough to ensure that the brightness of the entire backlight is uniform when viewed from above the optical film 101.
  • a direct type backlight module has a relatively thick thickness, which is disadvantageous for the thin design of the liquid crystal television. If the light mixing distance D is reduced, the thickness of the direct type backlight module can be reduced, but this will result in uneven brightness of the backlight module. As shown in FIG. 2, the illumination above the corresponding light source 203 is relatively bright, and the illumination above the corresponding light source 203 is relatively dark, resulting in uneven brightness.
  • the illumination above the corresponding light source 203 is relatively dark, mainly because the light above the light source 203 is relatively small, and so little light is absorbed by the optical film 201, so that the light exits from the position. The light will be reduced again, causing the light at this location to be darker.
  • the prior art generally increases the number of light bars to solve the technical problem of uneven illumination, but this increases the cost.
  • the technical problem to be solved by the present invention is to provide a direct-lit backlight module and a liquid crystal display device, which can simultaneously achieve uniform brightness of the backlight module and a thinner liquid crystal display device.
  • a technical solution adopted by the present invention is to provide a direct type backlight module, wherein the direct type backlight module includes at least two light sources; a diffusion plate disposed above the light source; and a reflective sheet.
  • the optical film is disposed above the diffusion plate, and a plurality of through holes are disposed at positions between the adjacent two light sources. The distribution density of the plurality of through holes is uniform, and the diameter of the through holes is larger.
  • the optical film includes a diffusion film and two prism sheets, the diffusion film is disposed between the two prism sheets and the diffusion plate, or the two prism sheets are disposed between the diffusion film and the diffusion plate.
  • the through hole is disposed on the diffusion film or the prism sheet, or is disposed on the diffusion film and the prism sheet.
  • the prism sheet is made of PET material
  • the diffusion film is made of PET or PC material.
  • the cross section of the surface of the prism sheet is formed by a plurality of zigzags or a plurality of semicircles.
  • the light source is an LED light bar.
  • a technical solution adopted by the present invention is to provide a direct type backlight module, wherein the direct type backlight module includes at least two light sources; a diffusion plate disposed above the light source; and a reflective sheet.
  • the optical film is disposed under the light source, and a plurality of through holes are disposed at positions between the adjacent two light sources.
  • the distribution densities of the plurality of through holes are uniform, and the diameter of the through holes is larger away from the light source.
  • the diameters of the plurality of through holes are the same, and the distribution density of the through holes is larger away from the light source.
  • the optical film comprises a diffusion film and two prism sheets, the diffusion film is disposed between the two prism sheets and the diffusion plate, or the two prism sheets are disposed between the diffusion film and the diffusion plate.
  • the through hole is disposed on the diffusion film or the prism sheet, or is disposed on the diffusion film and the prism sheet.
  • the prism sheet is made of PET material
  • the diffusion film is made of PET or PC material.
  • the cross section of the surface of the prism sheet is formed by a plurality of zigzags or a plurality of semicircles.
  • the light source is an LED light bar.
  • another technical solution adopted by the present invention is to provide a liquid crystal display device, wherein the liquid crystal display device includes at least two light sources; a diffusion plate disposed above the light source; and a reflective sheet disposed on the light source
  • the optical film is disposed above the diffusion plate, and a plurality of through holes are disposed at positions corresponding between the adjacent two light sources; and the liquid crystal panel is disposed above the optical film.
  • the distribution densities of the plurality of through holes are uniform, and the diameter of the through holes is larger from the light source, or the diameters of the plurality of through holes are the same, and the distribution density of the through holes is larger away from the light source.
  • the optical film comprises a diffusion film and two prism sheets, the diffusion film is disposed between the two prism sheets and the diffusion plate, or the two prism sheets are disposed between the diffusion film and the diffusion plate.
  • the through hole is disposed on the diffusion film or the prism sheet, or is disposed on the diffusion film and the prism sheet.
  • the prism sheet is made of PET material
  • the diffusion film is made of PET or PC material.
  • the cross section of the surface of the prism sheet is formed by a plurality of zigzags or a plurality of semicircles.
  • the light source is an LED light bar.
  • the invention has the beneficial effects that the present invention is different from the prior art, and the present invention provides a plurality of through holes at the position of the corresponding optical film between two adjacent light sources, and can be increased by the arrangement of the optical film.
  • the large optical film corresponds to the passage of light at a position between two adjacent light sources, so that the brightness of the light at this position is close to or coincident with the brightness above the corresponding light source, so that the brightness of the backlight module can be uniform and the thinness of the liquid crystal display device can be simultaneously achieved. Chemical.
  • FIG. 1 is a schematic structural view of a direct type backlight module in the prior art
  • FIG. 2 is a schematic structural view of another direct type backlight module in the prior art
  • FIG. 3 is a schematic structural view of a direct type backlight module according to an embodiment of the present invention.
  • FIG. 4 is a distribution diagram of a through hole provided in an optical film of a direct type backlight module according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present invention.
  • Fig. 6 is an enlarged schematic view showing a light source in the liquid crystal display device shown in Fig. 5.
  • FIG. 3 is a schematic structural diagram of a direct type backlight module according to an embodiment of the present invention.
  • the direct type backlight module includes an optical film 301 , a diffusion plate 303 , a light source 304 , and a reflection sheet 305 .
  • the number of the light sources 304 is at least two.
  • the optical film 301 includes a diffusion film 301A and two prism sheets 301B and 301C.
  • the reflection sheet 305 is disposed under the light source 304.
  • the diffusion plate 303 is disposed above the light source 304 and is separated from the light source 304 by a light mixing distance D.
  • the optical film 301 is disposed above the diffusion plate 303.
  • the reflection sheet 305 is configured to reflect the light emitted from the light source 304 onto the diffusion plate 303.
  • the diffusion plate 303 uniformly diffuses the light and then emits the light to the optical film 301.
  • the optical film 301 corrects and agglomerates the incident light. Improve positive brightness.
  • the present invention provides a plurality of through holes 302 at positions between the optical film 301 corresponding to the adjacent two light sources 304.
  • the plurality of through holes 302 are provided on the diffusion film 301A or the prism sheets 301B, 301C, or on the diffusion film 301A and the prism sheets 301B, 301C.
  • the light source 304 is an LED light bar or any other device that can emit light.
  • the diffusion film 301A is made of PET or PC material
  • the prism sheets 301B, 301C are made of PET material
  • the cross sections of the surfaces of the two prism sheets 301B, 301C are a plurality of zigzags or a plurality of semicircular joints.
  • the diffusion film 301A is disposed between the two prism sheets 301B, 301C and the diffusion plate 303, or the two prism sheets 301B, 301C are disposed between the diffusion film 301A and the diffusion plate 303, which are not limited herein.
  • FIG. 4 is a distribution diagram of the through holes 402 disposed on the optical film 403.
  • the optical film 403 is provided with a plurality of through holes at positions corresponding between the adjacent two light sources 401. 402.
  • the distribution density of the plurality of through holes 402 is uniform, and the diameter of the through holes 402 is larger as the distance from the light source 401 is larger.
  • the diameters of the plurality of through holes 402 may also be the same, and the distribution density of the through holes is larger away from the light source 401 (not shown), or the diameter and density distribution of the plurality of through holes 402 are farther away from the light source 401. Large (not shown), as long as the light emitted from the light source 401 can be kept and the brightness of the backlight module can be uniformly and efficiently emitted, it is not limited herein.
  • FIG. 5 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present invention.
  • the liquid crystal display device of the present invention includes a front frame 501, a liquid crystal panel 502, a plastic frame 503, and an optical film. 504, a diffusion plate 505, a light source 506, a reflection sheet 507, and a back plate 508.
  • the front frame 501 is disposed above the liquid crystal panel 502, and is mainly used to protect the liquid crystal panel 502.
  • the optical film 504 is disposed above the diffusion plate 505, and is mainly used for correcting and agglomerating the light emitted by the diffusion plate 505 to improve the front surface. Brightness.
  • the diffuser plate 505 is disposed above the light source 506 and mainly functions to uniformly diffuse the light emitted by the light source 506.
  • the light source 506 is disposed above the reflective sheet 507, and the reflective sheet 507 is mainly used to reflect the downward light emitted by the light source 506 into the diffuser plate 505.
  • the back plate 508 is disposed at the bottom of the liquid crystal display device.
  • the plastic frame 503 plays a protective role for the liquid crystal display device, and is disposed in a rectangular cylinder structure. The inner cavity of the rectangular cylinder formed by the plastic frame 503 is used to mount the components included in the liquid crystal display device.
  • the plastic frame 503 can be any other structure having a certain volume, which is not limited herein.
  • the optical film 504 includes a diffusion film and two prism sheets (not shown), the diffusion film is disposed between the two prism sheets and the diffusion plate 505, or the two prism sheets are disposed on the diffusion film and the diffusion plate 505. between.
  • the diffusion film is made of PET or PC material
  • the prism sheet is made of PET material
  • the cross section of the surface of the prism sheet is formed by a plurality of zigzags or a plurality of semicircles.
  • the present invention sets a plurality of positions on the optical film 504 corresponding to the adjacent two light sources 506.
  • Through hole (not shown).
  • FIG. 6 is an enlarged view of the light source shown in FIG. 5, and the light sources 506 are strip-shaped, plural in number, and evenly arranged.
  • a plurality of through holes are disposed on the optical film 504 at positions corresponding to the two light sources 506. The through hole is disposed on the diffusion film or the prism sheet, or is disposed on the diffusion film and the prism sheet.
  • the density distribution of the plurality of through holes is uniform, and the diameter of the through holes is larger from the light source.
  • the diameters of the plurality of through holes may be the same, and the density distribution of the through holes is larger as the distance from the light source is larger, or multiple passes. The larger the diameter and density distribution of the holes, the greater the distance from the light source, which is not mandatory here.
  • the light source 506 is an LED light bar or any other device that can emit light.
  • the present invention provides a plurality of through holes on the optical film corresponding to positions between two adjacent light sources.
  • the optical film By providing the optical film, it is possible to increase the optical film between the adjacent two light sources.
  • the passage of light at the position makes the brightness of the light at this position close to or coincide with the brightness above the corresponding light source, so that the brightness of the backlight module can be uniform and the thickness of the liquid crystal display device can be reduced at the same time.

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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

一种直下式背光模组及液晶显示装置。直下式背光模组包括至少两个光源（304，401，506）；扩散板（303，505），设置于光源（304，401，506）的上方；反射片（305，507），设置于光源（304，401，506）的下方；光学膜片（301，403，504），设置于扩散板（303，505）的上方，并且在对应相邻两个光源（304，401，506）之间的位置设置多个通孔（302，402）。液晶显示装置还包括液晶面板（502），设置于光学膜片（301，403，504）的上方。通过上述方式，本发明能够在直下式背光模组亮度均匀的情况下，实现液晶显示装置的薄型化。

Description

一种直下式背光模组及液晶显示装置
【技术领域】
本发明涉及液晶显示领域，特别是涉及一种直下式背光模组及液晶显示装置。
【背景技术】
随着平板电视的兴起，平板电视基本取代CRT (Cathode Ray Tube，阴极射线管显示器)，其中，液晶电视是平板电视的一种。
液晶电视由于其液晶面板本身不能发光，需要由背光模组来提供光源，以实现液晶面板的图像显示。根据光源安装位置的不同，现有技术背光模组分直下式和侧入式两种。如图1所示，图1是现有技术一种直下式背光模组的结构示意图，所述直下式背光模组包括光学膜片101、扩散板102以及光源103。图1中的光学膜片101由三层膜组成，并且光学膜片101设置于扩散板102的上方，扩散板102设置于光源103的上方，并与光源103相距一混光距离D。
其中，光源103与扩散板102之间的混光距离D需要足够大，才能保证从光学膜片101上方看，整个背光的亮度均匀。但是，这样直下式背光模组的厚度会比较厚，不利于液晶电视的薄型化设计。如果减小混光距离D，则可以减小直下式背光模组的厚度，但是这样会导致背光模组的出光亮度不均匀。如图2所示，对应光源203上方的发光会比较亮，而对应光源203之间的上方的发光比较暗，导致亮度不均匀。而其中，对应光源203之间的上方的发光比较暗，主要原因是由于到达光源203之间上方的光线比较少，而且这么少的光线再经过光学膜片201的吸收，致使从该位置出射的光线会再次减少，导致这个位置的发光比较暗。
现有技术通常是增加灯条的数量来尽量解决发光不均匀的技术问题，但是，这样会增加成本。
【发明内容】
本发明主要解决的技术问题是提供一种直下式背光模组及液晶显示装置，能够同时实现背光模组亮度均匀和液晶显示装置的薄型化。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种直下式背光模组，其中，该直下式背光模组包括至少两个光源；扩散板，设置于光源的上方；反射片，设置于光源的下方；光学膜片，设置于扩散板的上方，并且在对应相邻两个光源之间的位置设置多个通孔，多个通孔的分布密度均一，并且通孔的直径越远离光源越大，或者多个通孔的直径相同，并且通孔的分布密度越远离光源越大，或者多个通孔的直径和多个通孔的分布密度都越远离光源越大；其中，光学膜片包括一扩散膜和两棱镜片，扩散膜设置在两棱镜片和扩散板之间，或者两棱镜片设置在扩散膜和扩散板之间。
其中，通孔设置于扩散膜或棱镜片上，或设置于扩散膜和棱镜片上。
其中，棱镜片由PET材料制成，扩散膜由PET或PC材料制成。
其中，棱镜片表面的截面是多个之字形或多个半圆形连接而成。
其中，光源为LED灯条。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种直下式背光模组，其中，该直下式背光模组包括至少两个光源；扩散板，设置于光源的上方；反射片，设置于光源的下方；光学膜片，设置于扩散板的上方，并且在对应相邻两个光源之间的位置设置多个通孔。
其中，多个通孔的分布密度均一，并且通孔的直径越远离光源越大。
其中，多个通孔的直径相同，并且通孔的分布密度越远离光源越大。
其中，光学膜片包括一扩散膜和两棱镜片，扩散膜设置在两棱镜片和扩散板之间，或者两棱镜片设置在扩散膜和扩散板之间。
其中，通孔设置于扩散膜或棱镜片上，或设置于扩散膜和棱镜片上。
其中，棱镜片由PET材料制成，扩散膜由PET或PC材料制成。
其中，棱镜片表面的截面是多个之字形或多个半圆形连接而成。
其中，光源为LED灯条。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种液晶显示装置，其中，该液晶显示装置包括至少两个光源；扩散板，设置于光源的上方；反射片，设置于光源的下方；光学膜片，设置于扩散板的上方，并且在对应相邻两个光源之间的位置设置多个通孔；液晶面板，设置于光学膜片的上方。
其中，多个通孔的分布密度均一，并且通孔的直径越远离光源越大，或多个通孔的直径相同，并且通孔的分布密度越远离光源越大。
其中，光学膜片包括一扩散膜和两棱镜片，扩散膜设置在两棱镜片和扩散板之间，或者两棱镜片设置在扩散膜和扩散板之间。
其中，通孔设置于扩散膜或棱镜片上，或设置于扩散膜和棱镜片上。
其中，棱镜片由PET材料制成，扩散膜由PET或PC材料制成。
其中，棱镜片表面的截面是多个之字形或多个半圆形连接而成。
其中，光源为LED灯条。
本发明的有益效果是：区别于现有技术的情况，本发明在相邻两个光源之间对应的光学膜片的位置上设置多个通孔，通过对上述光学膜片的设置，能够增大光学膜片对应相邻两个光源之间位置处光线的通过，使得这个位置处的发光亮度与对应光源上方的亮度接近或一致，因此能够同时实现背光模组亮度均匀和液晶显示装置的薄型化。
【附图说明】
图1是 现有技术一种直下式背光模组的结构示意图；
图2是 现有技术另一种直下式背光模组的结构示意图；
图3是 本发明实施例的直下式背光模组的结构示意图；
图4是 本发明实施例的直下式背光模组的一种光学膜片上设置的通孔的分布图；
图5是 本发明实施例的一种液晶显示装置的结构示意图；
图6是 图5所示的液晶显示装置中光源的放大示意图。
【具体实施方式】
请参阅图3，图3是本发明实施例的直下式背光模组的结构示意图，该直下式背光模组包括光学膜片301、扩散板303、光源304以及反射片305。其中，光源304的数量为至少两个。光学膜片301包括扩散膜301A和两棱镜片301B和301C。
其中，反射片305设置在光源304的下方，扩散板303设置在光源304的上方并与光源304相距一混光距离D，光学膜片301设置在扩散板303的上方。
反射片305用于反射光源304发出的光线至扩散板303上，扩散板303对光线进行均匀的扩散后射出至光学膜片301，光学膜片301对入射的光线进行光方向的修正、凝聚以提高正面辉度。
为了使从光源304发出的光线能保持亮度均匀且高效率地射出背光模组，本发明在光学膜片301对应相邻两个光源304之间的位置上设置多个通孔302。该多个通孔302设置在扩散膜301A或棱镜片301B、301C上，或者设置在扩散膜301A和棱镜片301B、301C上。
其中，光源304为LED灯条或者其他任何可以发光的装置。扩散膜301A由PET或PC材料制成，棱镜片301B、301C由PET材料制成，并且两棱镜片301B、301C表面的截面是多个之字形或多个半圆形连接而成。扩散膜301A设置在两棱镜片301B、301C和扩散板303之间，或者两棱镜片301B、301C设置在扩散膜301A和扩散板303之间，在此不加以限制。
请参阅图4，图4是光学膜片403上设置的通孔402的分布图，如图4所示，光学膜片403在对应相邻两个光源401之间的位置上设置多个通孔402。设置的多个通孔402的分布密度均一，并且通孔402的直径越远离光源401越大。当然，多个通孔402的直径也可以相同，并且通孔的分布密度越远离光源401越大（图中未画出），或者多个通孔402的直径和密度分布都越远离光源401越大（图中未画出），只要能达到从光源401发出的光线能保持亮度均匀且高效率地射出背光模组即可，在此不作限制。
请参阅图5，图5是本发明实施例的一种液晶显示装置的结构示意图，如图5所示，本发明的液晶显示装置包括前框501、液晶面板502、胶框503、光学膜片504、扩散板505、光源506、反射片507以及背板508。
其中，前框501设置在液晶面板502的上方，主要用于保护液晶面板502，光学膜片504设置在扩散板505上方，主要用于对扩散板505发射出的光线进行修正、凝聚以提高正面辉度。扩散板505设置于光源506的上方，主要起到的作用是对光源506发出的光线进行均匀地扩散。光源506设置在反射片507的上方，反射片507主要用于将光源506发出的向下的光线反射至扩散板505中。背板508设置在液晶显示装置的底部。胶框503对液晶显示装置起到一个保护的作用，其设置成一个长方柱体结构，胶框503形成的长方柱体的内腔用于装置上述液晶显示装置所包含的部件。
其中，胶框503可以为其他有一定容积的任何结构，在此不加以限制。
在本实施例中，光学膜片504包括一扩散膜和两棱镜片（未标示），扩散膜设置在两棱镜片和扩散板505之间，或者两棱镜片设置在扩散膜和扩散板505之间。其中，扩散膜由PET或PC材料制成，棱镜片由PET材料制成，并且棱镜片表面的截面是多个之字形或多个半圆形连接而成。
为了使从光源506发出的光线能保持亮度均匀且高效率的从光学膜片504射出后到达液晶面板502，本发明在光学膜片504上对应相邻两个光源506之间的位置设置多个通孔（图未示）。图6 所示，图6是图5所示的光源的放大图，光源506为条状，数量为多个，并且均匀排列。光学膜片504上对应两光源506之间的位置设置多个通孔（图未示）。其中，通孔设置于扩散膜或棱镜片上，或设置于扩散膜和棱镜片上。设置的多个通孔的密度分布均一，并且通孔的直径越远离光源越大，当然，多个通孔的直径也可以相同，并且通孔的密度分布越远离光源越大，或者多个通孔的直径和密度分布都是越远离光源越大，在此不加以强制。
其中，光源506为LED灯条或者其他任何可以发光的装置。
综上所述，本发明在光学膜片上对应两相邻光源之间的位置设置多个通孔，通过对上述光学膜片的设置，能够增大光学膜片对应相邻两个光源之间位置处光线的通过，使得这个位置处的发光亮度与对应光源上方的亮度接近或一致，因此能够同时实现背光模组亮度均匀和液晶显示装置的薄型化。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，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 (20)

  1. 一种直下式背光模组，其中，所述直下背光模组包括：
    至少两个光源；
    扩散板，设置于所述光源的上方；
    反射片，设置于所述光源的下方；
    光学膜片，设置于所述扩散板的上方，并且在对应相邻两个所述光源之间的位置设置多个通孔，所述多个通孔的分布密度均一，并且所述通孔的直径越远离所述光源越大，或者所述多个通孔的直径相同，并且所述通孔的分布密度越远离所述光源越大，或者所述多个通孔的直径和所述多个通孔的分布密度都越远离所述光源越大；
    其中，所述光学膜片包括一扩散膜和两棱镜片，所述扩散膜设置在所述两棱镜片和所述扩散板之间，或者所述两棱镜片设置在所述扩散膜和所述扩散板之间。
  2. 根据权利要求1所述的直下式背光模组，其中，所述通孔设置于所述扩散膜或所述棱镜片上，或设置于所述扩散膜和所述棱镜片上。
  3. 根据权利要求1所述的直下式背光模组，其中，所述棱镜片由PET材料制成，所述扩散膜由PET或PC材料制成。
  4. 根据权利要求1所述的直下式背光模组，其中，所述棱镜片表面的截面是多个之字形或多个半圆形连接而成。
  5. 根据权利要求1所述的直下式背光模组，其中，所述光源为LED灯条。
  6. 一种直下式背光模组，其中，所述直下式背光模组包括：
    至少两个光源；
    扩散板，设置于所述光源的上方；
    反射片，设置于所述光源的下方；
    光学膜片，设置于所述扩散板的上方，并且在对应相邻两个所述光源之间的位置设置多个通孔。
  7. 根据权利要求6所述的直下式背光模组，其中，所述多个通孔的分布密度均一，并且所述通孔的直径越远离所述光源越大。
  8. 根据权利要求6所述的直下式背光模组，其中，所述多个通孔的直径相同，并且所述通孔的分布密度越远离所述光源越大。
  9. 根据权利要求6所述的直下式背光模组，其中，所述光学膜片包括一扩散膜和两棱镜片，所述扩散膜设置在所述两棱镜片和所述扩散板之间，或者所述两棱镜片设置在所述扩散膜和所述扩散板之间。
  10. 根据权利要求9所述的直下式背光模组，其中，所述通孔设置于所述扩散膜或所述棱镜片上，或设置于所述扩散膜和所述棱镜片上。
  11. 根据权利要求9所述的直下式背光模组，其中，所述棱镜片由PET材料制成，所述扩散膜由PET或PC材料制成。
  12. 根据权利要求9所述的直下式背光模组，其中，所述棱镜片表面的截面是多个之字形或多个半圆形连接而成。
  13. 根据权利要求6所述的直下式背光模组，其中，所述光源为LED灯条。
  14. 一种液晶显示装置，其中，所述液晶显示装置包括：
    至少两个光源；
    扩散板，设置于所述光源的上方；
    反射片，设置于所述光源的下方；
    光学膜片，设置于所述扩散板的上方，并且在对应相邻两个所述光源之间的位置设置多个通孔；
    液晶面板，设置于所述光学膜片的上方。
  15. 根据权利要求14所述的液晶显示装置，其中，所述多个通孔的分布密度均一，并且所述通孔的直径越远离所述光源越大，或所述多个通孔的直径相同，并且所述通孔的分布密度越远离所述光源越大。
  16. 根据权利要求14所述的液晶显示装置，其中，所述光学膜片包括一扩散膜和两棱镜片，所述扩散膜设置在所述两棱镜片和所述扩散板之间，或者所述两棱镜片设置在所述扩散膜和所述扩散板之间。
  17. 根据权利要求16所述的液晶显示装置，其中，所述通孔设置于所述扩散膜或所述棱镜片上，或设置于所述扩散膜和所述棱镜片上。
  18. 根据权利要求16所述的液晶显示装置，其中，所述棱镜片由PET材料制成，所述扩散膜由PET或PC材料制成。
  19. 根据权利要求16所述的液晶显示装置，其中，所述棱镜片表面的截面是多个之字形或多个半圆形连接而成。
  20. 根据权利要求14所述的液晶显示装置，其中，所述光源为LED灯条。
PCT/CN2012/073922 2012-03-26 2012-04-12 一种直下式背光模组及液晶显示装置 WO2013143176A1 (zh)

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