WO2013155702A1 - 背光模块以及液晶显示装置 - Google Patents

背光模块以及液晶显示装置 Download PDF

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Publication number
WO2013155702A1
WO2013155702A1 PCT/CN2012/074438 CN2012074438W WO2013155702A1 WO 2013155702 A1 WO2013155702 A1 WO 2013155702A1 CN 2012074438 W CN2012074438 W CN 2012074438W WO 2013155702 A1 WO2013155702 A1 WO 2013155702A1
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Prior art keywords
backlight module
led light
light source
liquid crystal
crystal display
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PCT/CN2012/074438
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English (en)
French (fr)
Inventor
贺虎
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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 US13/512,597 priority Critical patent/US9140931B2/en
Priority to DE112012006255.8T priority patent/DE112012006255B4/de
Publication of WO2013155702A1 publication Critical patent/WO2013155702A1/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
    • G02F1/133603—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
    • G02F1/133608—Direct backlight including particular frames or supporting means

Definitions

  • the present invention relates to the field of liquid crystal display, and in particular to a backlight module and a liquid crystal display device capable of improving display quality.
  • Liquid crystal display (Liquid Crystal Display, LCD) has been widely used in a variety of electronic products, most of which are backlit LCDs, including liquid crystal display panels and backlight modules (backlight Module).
  • the backlight module can be divided into a side-light type and a direct-light type according to the incident position of the light source (Direct-light) Type) Two to provide a backlight to the LCD panel.
  • Direct-light Direct-light
  • FIG. 1 is a schematic structural view of a conventional direct-lit backlight module 100, wherein 101 is a backplane, and 102 is an LED light source, wherein the LED light source 102 is evenly distributed on the backplane 101. Since the human eye has weak perception of the brightness of the central area of the display panel and strong color perception, the brightness of the edge area of the display panel is strongly perceived and the color perception is weak. Therefore, when the liquid crystal display device of the backlight module 100 described above is used for image display, the user feels that the brightness of the central area of the display panel is poor, which affects the display quality.
  • the invention provides a backlight module and a liquid crystal display device with different height settings in different regions of the backlight module to improve display quality, so as to solve the display quality of the existing direct-lit backlight module and liquid crystal display device. Poor technical issues.
  • the invention relates to a backlight module, comprising: a back plate disposed at a bottom of the backlight module; at least two LED light sources disposed on the back plate; and a diffusion plate disposed on a light emitting surface of the backlight module
  • the LED light source disposed in different regions of the backboard has a different distance from the diffuser panel; the distance between the LED light source and the diffuser panel in the central region of the backplane is smaller than the backplane a distance between the LED light source of the edge region and the diffusion plate; the cross section of the back plate is stepped, and the number of steps of the cross section is greater than 1.
  • the invention further relates to a backlight module, comprising: a back plate disposed at a bottom of the backlight module; at least two LED light sources disposed on the back plate; and a diffusion plate disposed at the backlight module
  • the LED light source disposed in different regions of the back panel has a different distance from the diffusion plate.
  • a distance between the LED light source of the central region of the back plate and the diffusion plate is smaller than a distance between the LED light source of the edge region of the back plate and the diffusion plate.
  • the density of the LED light sources disposed in different regions of the backplane is different.
  • the density of the LED light source in the central region of the backplane is greater than the density of the LED light source in the edge region of the backplane.
  • the LED light source includes a light emitting chip and a lens for increasing an angle of light emission of the light emitting chip.
  • the cross section of the back plate is stepped, and the number of steps of the cross section is greater than 1.
  • the inner surface of the back plate is provided with a reflective film.
  • the diffusion plate is provided with an optical film for improving the light-emitting effect of the backlight module.
  • the present invention also relates to a liquid crystal display device comprising: a display panel; and a backlight module comprising: a back plate disposed at a bottom of the backlight module; at least two LED light sources disposed on the back plate; and diffusion And a plate disposed on the light emitting surface of the backlight module; the LED light source disposed in different regions of the back plate has a different distance from the diffusing plate.
  • the distance between the LED light source of the central region of the back plate and the diffusion plate is smaller than the distance between the LED light source of the edge region of the back plate and the diffusion plate .
  • the density of the LED light sources provided in different regions of the back sheet is different.
  • the density of the LED light source in the central region of the backing plate is greater than the density of the LED light source in the edge region of the backing plate.
  • the LED light source includes a light emitting chip and a lens for increasing an angle of light emission of the light emitting chip.
  • the cross section of the back sheet is stepped, and the number of steps of the cross section is greater than 1.
  • the inner surface of the back sheet is provided with a reflective film.
  • the diffusion plate is provided with an optical film for improving the light-emitting effect of the backlight module.
  • the LED light source in different areas of the backlight module adopts different height settings to improve the display quality, and solves the technical problems of the conventional direct-lit backlight module and the poor display quality of the liquid crystal display device.
  • FIG. 1 is a schematic structural view of a backlight module of a direct-lit light entering device of the prior art
  • FIG. 2 is a schematic structural view of a first preferred embodiment of a backlight module of the present invention
  • FIG 3 is a schematic structural view of a second preferred embodiment of a backlight module of the present invention.
  • the backlight module 200 includes a back plate 201, at least two LED light sources 202, a diffusion plate 203, and a reflective film. 204 and the optical film 205, the back plate 201 is disposed at the bottom of the backlight module 200; the LED light source 202 is disposed on the back plate 201; the diffusion plate 203 is disposed on the light emitting surface of the backlight module 200; and the reflective film 204 is disposed on the back plate 201 The inner surface; the optical film 205 is disposed on the diffusion plate 203 for improving the light-emitting effect of the backlight module 200.
  • the LED light source 202 disposed in different regions of the backplane 201 and the diffusion panel 203 have different distances (ie, the LED light sources 202 located in different regions of the backplane 201 have different mixing distances), as shown in FIG. 2 .
  • the distance between the LED light source 202 and the diffuser plate 203 in the central region of the back plate 201 is smaller than the distance between the LED light source 202 and the diffuser plate 203 in the edge region of the back plate 201.
  • the backlight module 200 of the present invention when used, since the light mixing distance of the LED light source 202 in the central region of the back plate 201 is small, the light mixing distance of the LED light source 202 in the edge region of the back plate 201 is large, so that the backlight module and the corresponding display panel The brightness of the central area increases.
  • the cross section of the back plate 201 can be designed as a step, and the number of steps of the cross section is greater than 1 (the number of steps in the figure is 2).
  • the cross section of the back plate 201 can also be set to other shapes, such as a triangle.
  • the backlight module 200 of the present invention can be realized by a trapezoidal shape, a multi-step shape, or the like.
  • FIG. 3 is a schematic structural view of a second preferred embodiment of the backlight module of the present invention.
  • the following is only a description of the differences between the present embodiment and the first embodiment, and the similarities are not here. Let me repeat.
  • the density of the LED light source 202 disposed in different regions of the back plate 201 in the second embodiment is also different, wherein the density of the LED light source 202 in the central region of the back plate 201 is greater than the edge region of the back plate 201.
  • the density of the LED light source 202 is also different, wherein the density of the LED light source 202 in the central region of the back plate 201 is greater than the edge region of the back plate 201. The density of the LED light source 202.
  • the direct-lit light-emitting backlight module 300 in this embodiment has a small distance between the LED light source 202 and the diffuser plate 203 in the central region of the back plate 201 (ie, the light-mixing distance of the LED light source 202), and is easily displayed in the corresponding display.
  • a mura phenomenon occurs in the central area of the panel.
  • the ratio of the light mixing distance of the LED light source 202 and the gap distance of the LED light source 202 ie, the gap between the adjacent LED light sources 202) (the ratio of H to P in FIG. 3) increases, the spot of the backlight module 300 The phenomenon will be greatly improved.
  • the density of the LED light source 202 in the central region of the back panel 201 is greater than the density of the LED light source 202 in the edge region of the back panel 201, thereby reducing the LED light source 202 of the central region of the back panel 201.
  • the gap distance further increases the ratio of H to P of the LED light source 202 in the central region of the back plate 201.
  • the spot height of the corresponding display panel is also improved while improving the set height of the LED light source 202. control.
  • the cross section of the back plate 201 can be designed as a step, and the number of steps of the cross section is greater than 1 (the number of steps in the figure is 2).
  • the interface of the back plate 201 can also be set to other shapes, such as a triangle.
  • the backlight module 300 of the present invention can be realized by a trapezoidal shape, a multi-step shape, or the like.
  • the LED light source 202 of the backlight module of the present invention may include a light emitting chip and a lens for increasing the light emitting angle of the light emitting chip, and the use of the lens further improves the uniformity of the light emitting of the light emitting chip, so that the display effect of the corresponding display panel is further improved.
  • the light-emitting chip can be integrally formed with the corresponding lens or separately.
  • the reflective film 204 in the present invention may be a reflective film or a reflective coating having a high reflectivity material to prevent light from being emitted from the back plate 201 to affect the luminous efficiency of the backlight module.
  • the high reflectivity material may be, for example, silver, aluminum, gold, chromium, copper, indium, antimony, nickel, platinum, rhodium, iridium, tin, antimony, tungsten, manganese, an alloy of any combination thereof, yellowing resistant and heat resistant.
  • the optical film 205 in the present invention may be a prism sheet or a reverse prism sheet (Turning Prism) Sheet), Brightness Enhancement Film (BEF), Reflective Brightness Enhancement Film (Dual Brightness Enhancement) Film, DBEF), non-multilayer film reflective polarizer (Diffused Reflective Polarizer) Film, DRPF, or any combination thereof, is disposed on the diffusion plate 203 to improve the light-emitting effect of the backlight module.
  • the present invention also relates to a liquid crystal display device comprising a display panel and a backlight module, the backlight module comprising a back plate, at least two LED light sources, a diffusion plate, a reflective film and an optical film, the back plate being disposed at the bottom of the backlight module;
  • the light source is disposed on the back plate;
  • the diffusion plate is disposed on the light emitting surface of the backlight module;
  • the reflective film is disposed on the inner surface of the back plate;
  • the optical film is disposed on the diffusion plate for improving the light emitting effect of the backlight module.
  • the liquid crystal display device of the present invention has different distances between the LED light source and the diffusion plate disposed in different regions of the back plate (ie, the LED light sources located in different regions of the back plate have different light mixing distances), and the LED light source in the central region of the back plate
  • the distance from the diffuser plate is less than the distance between the LED light source and the diffuser plate in the edge region of the back plate.
  • the backlight module and the liquid crystal display device of the present invention adopt different height settings of LED light sources in different regions of the backlight module to improve the display quality of the backlight module and the liquid crystal display device, and at the same time, the backlight module can be well avoided.
  • the occurrence of the speckle phenomenon further solves the technical problem of poor display quality of the existing backlight module and the liquid crystal display device.

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  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
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Abstract

一种背光模块（200）以及液晶显示装置，背光模块（200）包括设置在背光模块（200）底部的背板（201）、设置在背板（201）上的LED光源（202）以及设置在背光模块（200）的出光面上的扩散板（203），设置在背板（201）不同区域的LED光源（202）与扩散板（203）之间具有不同的距离。该背光模块（200）以及液晶显示装置在背板（201）的不同区域的LED光源（202）采用不同的高度设置以提升显示品质。

Description

背光模块以及液晶显示装置 技术领域
本发明涉及液晶显示领域，特别是涉及一种可提升显示品质的背光模块以及液晶显示装置。
 背景技术
液晶显示器(Liquid Crystal Display，LCD)已被广泛应用于各种电子产品中，液晶显示器大部分为背光型液晶显示器，其包括液晶显示面板及背光模块(backlight module)。背光模块可依照光源入射位置的不同分成侧向式入光(Side-light type)与直下式入光(Direct-light type)两种，以便提供背光源至液晶显示面板。
图1为现有的直下式入光的背光模块100的结构示意图，其中101为背板，102为LED光源，其中LED光源102均匀的分布在背板101上。由于人眼对显示面板中心区域的亮度感知较弱、颜色感知较强，对显示面板边缘区域的亮度感知较强、颜色感知较弱。因此使用上述背光模块100的液晶显示装置进行图像显示时使用者会感觉显示面板中心区域的亮度较差，影响显示品质。
故，有必要提供一种背光模块以及液晶显示装置，以解决现有技术所存在的问题。
 技术问题
本发明提供一种在背光模块的不同区域的LED光源采用不同的高度设置以提升显示品质的背光模块以及液晶显示装置，以解决现有的直下式入光的背光模块以及液晶显示装置的显示品质较差的技术问题。
 技术解决方案
本发明涉及一种背光模块，其中包括：背板，设置在所述背光模块的底部；至少两个LED光源，设置在所述背板上；以及扩散板，设置在所述背光模块的出光面上；设置在所述背板不同区域的LED光源与所述扩散板之间具有不同的距离；所述背板的中心区域的LED光源与所述扩散板之间的距离小于所述背板的边缘区域的LED光源与所述扩散板之间的距离；所述背板的截面为台阶状，所述截面的台阶数大于1。
本发明还涉及一种背光模块，其中包括：背板，设置在所述背光模块的底部；至少两个LED光源，设置在所述背板上；以及扩散板，设置在所述背光模块的出光面上；设置在所述背板不同区域的LED光源与所述扩散板之间具有不同的距离。
在本发明所述的背光模块中，所述背板的中心区域的LED光源与所述扩散板之间的距离小于所述背板的边缘区域的LED光源与所述扩散板之间的距离。
在本发明所述的背光模块中，设置在所述背板不同区域的LED光源的密度不同。
在本发明所述的背光模块中，所述背板的中心区域的LED光源的密度大于所述背板的边缘区域的LED光源的密度。
在本发明所述的背光模块中，所述LED光源包括发光芯片以及用于增大所述发光芯片的发光角度的透镜。
在本发明所述的背光模块中，所述背板的截面为台阶状，所述截面的台阶数大于1。
在本发明所述的背光模块中，所述背板的内表面设置有反射膜。
在本发明所述的背光模块中，所述扩散板上设置有用于改善所述背光模块的出光效果的光学膜片。
本发明还涉及一种液晶显示装置，其中包括：显示面板；以及背光模块，包括：背板，设置在所述背光模块的底部；至少两个LED光源，设置在所述背板上；以及扩散板，设置在所述背光模块的出光面上；设置在所述背板不同区域的LED光源与所述扩散板之间具有不同的距离。
在本发明所述的液晶显示装置中，所述背板的中心区域的LED光源与所述扩散板之间的距离小于所述背板的边缘区域的LED光源与所述扩散板之间的距离。
在本发明所述的液晶显示装置中，设置在所述背板不同区域的LED光源的密度不同。
在本发明所述的液晶显示装置中，所述背板的中心区域的LED光源的密度大于所述背板的边缘区域的LED光源的密度。
在本发明所述的液晶显示装置中，所述LED光源包括发光芯片以及用于增大所述发光芯片的发光角度的透镜。
在本发明所述的液晶显示装置中，所述背板的截面为台阶状，所述截面的台阶数大于1。
在本发明所述的液晶显示装置中，所述背板的内表面设置有反射膜。
在本发明所述的液晶显示装置中，所述扩散板上设置有用于改善所述背光模块的出光效果的光学膜片。
 有益效果
通过在背光模块的不同区域的LED光源采用不同的高度设置以提升显示品质，解决了现有的直下式入光的背光模块以及液晶显示装置的显示品质较差的技术问题。
 附图说明
图1为现有技术的直下式入光的背光模块的结构示意图；
图2为本发明的背光模块的第一优选实施例的结构示意图；
图3为本发明的背光模块的第二优选实施例的结构示意图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
在图中，结构相似的单元是以相同标号表示。
请参照图2，图2为本发明的背光模块的第一优选实施例的结构示意图，在本实施例中，背光模块200包括背板201、至少两个LED光源202、扩散板203、反射膜204以及光学膜片205，背板201设置在背光模块200的底部；LED光源202设置在背板201上；扩散板203设置在背光模块200的出光面上；反射膜204设置在背板201的内表面；光学膜片205设置在扩散板203上，用于改善背光模块200的出光效果。其中，本实施例中设置在背板201不同区域的LED光源202与扩散板203之间具有不同的距离（即位于背板201不同区域的LED光源202具有不同的混光距离），如图2所示，背板201的中心区域的LED光源202与扩散板203之间的距离小于背板201的边缘区域的LED光源202与扩散板203之间的距离。
本发明的背光模块200使用时，由于背板201中心区域的LED光源202的混光距离较小，背板201边缘区域的LED光源202的混光距离较大，使得背光模块以及相应的显示面板的中心区域的亮度增加。如图2所示，背板201的截面可设计成台阶状，截面的台阶数大于1（图中的台阶数为2），当然背板201的截面也可设置成其他的形状，例如三角形、梯形、多台阶形等，均可实现本发明的背光模块200。
请参照图3，图3为本发明的背光模块的第二优选实施例的结构示意图，以下仅就本实施例与第一实施例间的相异处进行说明，而其相似处则在此不再赘述。相较于第一实施例，第二实施例中的设置在背板201不同区域的LED光源202的密度也不同，其中背板201的中心区域的LED光源202的密度大于背板201的边缘区域的LED光源202的密度。
本实施例中的直下式入光的背光模块300由于背板201的中心区域的LED光源202与扩散板203之间的距离（即LED光源202的混光距离）较小，容易在相应的显示面板中心区域产生斑点（mura）现象。但是当LED光源202的混光距离和LED光源202的间隙距离（即相邻LED光源202之间的间隙）的比值（图3中的H与P的比值）增大时，背光模块300的斑点现象将大大改善。因此本发明的背光模块300使用时，背板201的中心区域的LED光源202的密度大于背板201的边缘区域的LED光源202的密度，从而减小了背板201的中心区域的LED光源202的间隙距离，进而增大了背板201的中心区域的LED光源202的H与P的比值，在改进LED光源202的设置高度的同时对相应的显示面板中心区域的斑点现象也进行了很好的控制。如图3所示，背板201的截面可设计成台阶状，截面的台阶数大于1（图中的台阶数为2），当然背板201的界面也可设置成其他的形状，例如三角形、梯形、多台阶形等，均可实现本发明的背光模块300。
本发明的背光模块的LED光源202可包括发光芯片以及透镜，透镜用于增大发光芯片的发光角度，透镜的使用进一步改善了发光芯片的发光的均匀性，使得相应的显示面板的显示效果更好，其中发光芯片可与相应的透镜一体成型也可分别成型。
本发明中的反射膜204可为反射膜片或反射涂层，其具有高反射率材料，用以防止光线由背板201射出而影响背光模块的发光效率。此高反射率材料可例如为银、铝、金、铬、铜、铟、铱、镍、铂、铼、铑、锡、钽、钨、锰、上述任意组合的合金、耐黄化且耐热的白色反射漆料或上述材料的任意组合，以反射光线。
本发明中的光学膜片205可为棱镜片、逆棱镜片(Turning Prism Sheet)、增亮膜(Brightness Enhancement Film，BEF)、反射式增亮膜(Dual Brightness Enhancement Film，DBEF)、非多层膜式反射偏光片(Diffused Reflective Polarizer Film，DRPF)或上述的任意组合，其设置于扩散板203上，用以改善背光模块的出光效果。
本发明还涉及一种液晶显示装置，其中包括显示面板以及背光模块，背光模块包括背板、至少两个LED光源、扩散板、反射膜以及光学膜片，背板设置在背光模块的底部；LED光源设置在背板上；扩散板设置在背光模块的出光面上；反射膜设置在背板的内表面；光学膜片设置在扩散板上，用于改善背光模块的出光效果。本发明的液晶显示装置设置在背板不同区域的LED光源与扩散板之间具有不同的距离（即位于背板不同区域的LED光源具有不同的混光距离），背板的中心区域的LED光源与扩散板之间的距离小于背板的边缘区域的LED光源与扩散板之间的距离。本发明的液晶显示装置的工作原理和有益效果与上述的背光模块的具体实施例中描述的相同或相似，具体请参见上述背光模块的具体实施例。
由上述可知，本发明的背光模块和液晶显示装置通过在背光模块的不同区域的LED光源采用不同的高度设置以提升背光模块以及液晶显示装置的显示品质，同时还可很好的避免背光模块的斑点现象的发生，进而较好的解决了现有背光模块和液晶显示装置显示品质较差的技术问题。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。
 本发明的实施方式
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Claims (19)

  1. 一种背光模块，其中包括：
    背板，设置在所述背光模块的底部；
    至少两个LED光源，设置在所述背板上；以及
    扩散板，设置在所述背光模块的出光面上；
    设置在所述背板不同区域的LED光源与所述扩散板之间具有不同的距离；
    所述背板的中心区域的LED光源与所述扩散板之间的距离小于所述背板的边缘区域的LED光源与所述扩散板之间的距离；
    所述背板的截面为台阶状，所述截面的台阶数大于1。
  2. 一种背光模块，其中包括：
    背板，设置在所述背光模块的底部；
    至少两个LED光源，设置在所述背板上；以及
    扩散板，设置在所述背光模块的出光面上；
    设置在所述背板不同区域的LED光源与所述扩散板之间具有不同的距离。
  3. 根据权利要求2所述的背光模块，其中所述背板的中心区域的LED光源与所述扩散板之间的距离小于所述背板的边缘区域的LED光源与所述扩散板之间的距离。
  4. 根据权利要求2所述的背光模块，其中设置在所述背板不同区域的LED光源的密度不同。
  5. 根据权利要求3所述的背光模块，其中设置在所述背板不同区域的LED光源的密度不同。
  6. 根据权利要求4所述的背光模块，其中所述背板的中心区域的LED光源的密度大于所述背板的边缘区域的LED光源的密度。
  7. 根据权利要求2所述的背光模块，其中所述LED光源包括发光芯片以及用于增大所述发光芯片的发光角度的透镜。
  8. 根据权利要求2所述的背光模块，其中所述背板的截面为台阶状，所述截面的台阶数大于1。
  9. 根据权利要求2所述的背光模块，其中所述背板的内表面设置有反射膜。
  10. 根据权利要求2所述的背光模块，其中所述扩散板上设置有用于改善所述背光模块的出光效果的光学膜片。
  11. 一种液晶显示装置，其中包括：
    显示面板；以及
    背光模块，包括：
    背板，设置在所述背光模块的底部；
    至少两个LED光源，设置在所述背板上；以及
    扩散板，设置在所述背光模块的出光面上；
    设置在所述背板不同区域的LED光源与所述扩散板之间具有不同的距离。
  12. 根据权利要求11所述的液晶显示装置，其中所述背板的中心区域的LED光源与所述扩散板之间的距离小于所述背板的边缘区域的LED光源与所述扩散板之间的距离。
  13. 根据权利要求11所述的液晶显示装置，其中设置在所述背板不同区域的LED光源的密度不同。
  14. 根据权利要求12所述的液晶显示装置，其中设置在所述背板不同区域的LED光源的密度不同。
  15. 根据权利要求13所述的液晶显示装置，其中所述背板的中心区域的LED光源的密度大于所述背板的边缘区域的LED光源的密度。
  16. 根据权利要求11所述的液晶显示装置，其中所述LED光源包括发光芯片以及用于增大所述发光芯片的发光角度的透镜。
  17. 根据权利要求11所述的液晶显示装置，其中所述背板的截面为台阶状，所述截面的台阶数大于1。
  18. 根据权利要求11所述的液晶显示装置，其中所述背板的内表面设置有反射膜。
  19. 根据权利要求11所述的液晶显示装置，其中所述扩散板上设置有用于改善所述背光模块的出光效果的光学膜片。
PCT/CN2012/074438 2012-04-18 2012-04-20 背光模块以及液晶显示装置 WO2013155702A1 (zh)

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