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WO2018171362A1 - 背光源及液晶显示装置 - Google Patents

背光源及液晶显示装置 Download PDF

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Publication number
WO2018171362A1
WO2018171362A1 PCT/CN2018/076320 CN2018076320W WO2018171362A1 WO 2018171362 A1 WO2018171362 A1 WO 2018171362A1 CN 2018076320 W CN2018076320 W CN 2018076320W WO 2018171362 A1 WO2018171362 A1 WO 2018171362A1
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WO
WIPO (PCT)
Prior art keywords
light sources
backlight
color
lenses
light
Prior art date
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Ceased
Application number
PCT/CN2018/076320
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English (en)
French (fr)
Inventor
王飞
孟宪东
王美丽
王慧娟
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.)
BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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Publication date
Application filed by BOE Technology Group Co Ltd, Beijing BOE Display Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to US16/081,804 priority Critical patent/US10996517B2/en
Publication of WO2018171362A1 publication Critical patent/WO2018171362A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • G02F1/133621—Illuminating devices providing coloured light
    • 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
    • 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
    • G02F1/133613—Direct backlight characterized by the sequence of light sources
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a backlight and a liquid crystal display device.
  • LCD Liquid Crystal Display
  • LCD Liquid Crystal Display
  • the conventional LCD includes a backlight 01 and a display panel 02.
  • the light emitted by the backlight 01 is white light. Therefore, in order to realize color display, it is necessary to provide the color film layer 021 in the display panel 01.
  • the color film layer 021 includes a first color pattern layer 0211, a second color pattern layer 0212, and a third color pattern layer 0213.
  • the white light emitted by the backlight 01 is incident on the color filter layer 021 through the liquid crystal layer, light having a color different from the color pattern layer in the light passing through each color pattern layer is absorbed, and the light having the same color as the color pattern layer can be Through, to achieve color display.
  • An embodiment of the present disclosure provides a backlight, including a plurality of light sources of at least three different colors disposed on a base substrate, and one of the plurality of light sources disposed on a light exiting side of the plurality of light sources. Corresponding multiple grating units, each of the plurality of grating units for splitting light emitted by a corresponding one of the plurality of light sources to form an evenly distributed array of monochromatic spots such that the backlight
  • the source may form a color spot array in which at least three different color spots are alternately arranged in the first direction, wherein the first direction is a row direction or a column direction of the color spot array.
  • the plurality of grating units are Daman gratings.
  • the backlight further includes a plurality of lenses corresponding to the plurality of light sources in a one-to-one correspondence between the plurality of light sources and the plurality of grating units, each of the plurality of lenses And concentrating light emitted by a corresponding one of the plurality of light sources.
  • the plurality of light sources are collimated light sources.
  • the plurality of lenses and the plurality of light sources are of a unitary structure; or the plurality of lenses and the plurality of light sources are assembled structures.
  • the plurality of lenses are aspherical lenses, Fresnel lenses or gradient index lenses.
  • the plurality of lenses and the plurality of light sources are assembled structures, at least a part of the plurality of lenses is a unitary structure.
  • the plurality of light sources of the at least three different colors comprise a plurality of first color light sources, a plurality of second color light sources and a plurality of third color light sources; and the plurality of first color light sources, the plurality of The second color light source and the plurality of third color light sources are alternately arranged in the first direction.
  • the plurality of grating units are of a unitary structure.
  • Another aspect of the embodiments of the present disclosure further provides a liquid crystal display device comprising any of the above backlights, wherein the array of light spots formed by the backlight corresponds to a sub-pixel array of the display device.
  • FIG. 1 is a schematic structural view of a liquid crystal display device provided by the prior art
  • FIG. 2 is a schematic structural diagram of a backlight provided by an embodiment of the present disclosure
  • FIG. 3 is a schematic view of a spot array formed by the backlight of FIG. 2;
  • FIG. 4 is a schematic diagram of forming a spot array through a Daman grating according to an embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of a structural unit for forming a single color spot array according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present disclosure.
  • FIG. 6b is a schematic structural diagram of another liquid crystal display device according to an embodiment of the present disclosure.
  • Embodiments of the present disclosure provide a backlight and a liquid crystal display device, which can avoid the problem of low light utilization rate caused by color filter by color filter layer.
  • An embodiment of the present disclosure provides a backlight and a liquid crystal display device, including a plurality of light sources of at least three different colors disposed on a substrate, and one-to-one corresponding to the plurality of light sources disposed on the light-emitting side of the plurality of light sources. Multiple raster units.
  • Each of the plurality of grating elements is configured to split light emitted by a corresponding one of the plurality of light sources to form an evenly distributed array of monochromatic spots such that the backlight can form at least three different colors along the first direction
  • the array of spots formed by the backlight corresponds to a sub-pixel array of the display device. That is, the light spots alternately arranged in the first direction along the three color spots in the first direction correspond to the sub-pixels in which the three colors in the first direction in the device are alternately arranged. Therefore, it is possible to avoid color filtering by using the color filter layer to realize color display, thereby improving the light utilization efficiency of the backlight.
  • the backlight 01 includes a plurality of light sources 101 of at least three different colors disposed on the base substrate 10, and is disposed on the light emitting side of the plurality of light sources 101.
  • a plurality of grating units 102 corresponding to the plurality of light sources 101 in one-to-one correspondence.
  • Each of the plurality of grating units 102 is configured to split light emitted by a corresponding one of the plurality of light sources 101 to form a uniformly distributed monochromatic array of spots, as shown in FIG. 3, such that the backlight 01 can be Forming a color spot array in which at least three different color spots are alternately arranged in the first direction XX', wherein the first direction XX' is a row direction or a column direction of the spot array.
  • the plurality of light sources 101 of the at least three different colors may include a first color light source, such as a red light source (R), a second color light source, such as a green light source (G), and a third color light source.
  • the blue light source (B) may of course include other color light sources, such as a yellow light source, a blue-green light source, and the like.
  • light sources of different colors may be selected from light emitting diodes (LEDs) of red, green and blue.
  • LEDs light emitting diodes
  • the monochromatic spot array may be a one-dimensional spot array or a two-dimensional spot array.
  • the backlight includes a plurality of light sources of the color to meet display requirements.
  • the above-mentioned monochromatic spot array is a two-dimensional spot array.
  • the color spot array may be a one-dimensional spot array or a two-dimensional spot array.
  • the color spot array is generally set to be a two-dimensional spot array, and a backlight is used to meet the display requirement.
  • the color spot array in which the at least three different color spots are alternately arranged in the first direction X-X' means that the spots of all the rows in the color spot array are alternately arranged in at least three different color spots.
  • the light spots of all the columns in the array of colored spots are alternately arranged in at least three different color spots.
  • the selection may be made according to actual needs.
  • the first direction X-X' is generally selected to be the row direction of the color spot array. That is, each of the spots in the color spot array is alternately arranged in three different color spots, and optionally in the direction perpendicular to the first direction XX' (ie, the column direction) is the same color spot. .
  • the array of spots formed by the backlight corresponds to a sub-pixel array of the display device. That is, the light spots alternately arranged in the first direction along the three color spots in the first direction correspond to the sub-pixels in which the three colors in the first direction of the device are alternately arranged, thereby avoiding filtering by the color film layer to realize color display.
  • the light utilization efficiency of the backlight is further improved.
  • a Daman grating is optionally used as the plurality of grating units 102.
  • Figure 4 shows an array of uniformly distributed spots that can be formed after light passes through the Daman grating.
  • the brightness of the spot at the center of the formed spot array is generally large, which may have a certain influence on the brightness uniformity of the picture in the display application. Therefore, in practical applications, ideal plane wave incidence can be used, and the grating can be optimized to ensure that light rays can be formed into equidistant light intensity spot arrays after passing through the Daman grating.
  • the disclosure is not limited thereto, and other gratings may be selected in practical applications to achieve beam splitting.
  • the following embodiments further illustrate the present disclosure by taking a Daman grating as an example.
  • the present disclosure optionally includes all of the plurality of grating units 102 in a unitary structure. That is, the plurality of grating units 102 corresponding to all the plurality of light sources 101 are an integral grating layer, and are directly assembled according to the preset positions of the plurality of grating units and the plurality of light sources during assembly.
  • the backlight 01 further includes a plurality of lenses 103 corresponding to the plurality of light sources 101 in a one-to-one correspondence between the plurality of light sources 101 and the plurality of grating units 102.
  • Each of the plurality of lenses 103 is configured to converge light emitted by a corresponding one of the plurality of light sources 101 such that the concentrated light is incident on a corresponding one of the plurality of grating units 102 to ensure uniform distribution of the formed spot array.
  • the plurality of light sources 101 may be selected as the collimated light sources, and the array of the formed spots may be uniformly distributed.
  • the disclosure does not limit this, and in actual applications, the selection can be made according to actual needs.
  • the backlight 01 is provided with a plurality of lenses 103 corresponding to the plurality of light sources 101 one by one between the plurality of light sources 101 and the plurality of grating units 102, as shown in FIG.
  • Each of the lenses 103 may be a unitary structure with a corresponding one of the plurality of light sources 101. That is, in processing each of the plurality of light sources 101, a corresponding one of the plurality of lenses 103 is simultaneously produced.
  • the plurality of lenses 103 may be assembled with the plurality of light sources 101, that is, each of the plurality of light sources 101 and a corresponding one of the plurality of lenses 103 are separately fabricated and assembled.
  • the plurality of lenses 103 and the plurality of light sources 101 are assembled, at least a part of the plurality of lenses 103 may be an integral structure. That is, it may be a part of the plurality of lenses 103 in the backlight, or may be all of the plurality of lenses 103, and may be a single lens layer.
  • the assembly is directly performed according to the preset positions of the plurality of lenses 103, the plurality of light sources 101, and the plurality of grating units 102, so as to reduce the disadvantages caused by the large number of errors of assembling a single lens multiple times, and at the same time simplify Installation process.
  • the a plurality of lenses 103 may be an aspherical lens, a Fresnel lens or a gradient index lens, which is not limited in the present disclosure, and may be selected according to actual needs, as long as the convergence of light can be satisfied.
  • the backlight 01 may include a plurality of first color light sources, a plurality of second color light sources, and a plurality of third color light sources, such that the array of spots formed by the plurality of light sources meets the requirements of the large-sized display device. .
  • a plurality of first color light sources, a plurality of second color light sources, and a plurality of third color light sources are along the first direction.
  • X-X' is alternately arranged in order.
  • the embodiment of the present disclosure further provides a liquid crystal display device, as shown in FIGS. 6a and 6b, the liquid crystal display device includes a display panel 02 and any of the foregoing backlights 01.
  • the array of spots formed by the backlight 01 corresponds to a sub-pixel array of the display device.
  • the liquid crystal display device includes the same structure as the backlight provided by the foregoing embodiment, and has the same advantageous effects. The structure and beneficial effects of the backlight have been described in detail since the foregoing embodiments, and are not described herein again.
  • the display panel 02 may not be provided with the color film layer 021, and the color spot corresponding to the color may be corresponding to the sub-pixel of the corresponding color to realize color display.
  • the red spot formed by the red light source in Figure 6a corresponds to the red sub-pixel (R) in the display panel.
  • R red sub-pixel
  • the color film layer 021 can also be set.
  • the spot of the first color is incident on the first color pattern layer 0211 in the color film layer 021, for example, the red spot formed by the red light source in FIG. 6b corresponds to the red pattern layer incident on the color film layer 021;
  • the light spot of the two colors is incident on the second color pattern layer 0212 in the color film layer 021;
  • the light spot of the third color is incident on the third color pattern layer 0213 in the color film layer 021.
  • the invention may also provide additional embodiments, which may include any of the above embodiments, and one or more of the components, functions or structures in the additional embodiments may be in any of the various embodiments described above Replace or supplement one or more of the components, functions, or structures.

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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)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种背光源（01）及液晶显示装置，涉及显示技术领域，能够避免采用彩膜层（021）来实现彩色显示导致光利用率低的问题。背光源（01）包括设置于衬底基板（10）上的至少三种不同颜色的多个光源（101），以及设置于多个光源（101）的出光侧的与多个光源（101）一一对应的多个光栅单元（102）。多个光栅单元（102）中的每一个用于对多个光源（101）中对应的一个发出的光线进行分束以形成均匀分布的单色光斑阵列，以使得背光源（01）可形成沿第一方向（X-X'）上至少三种不同颜色光斑依次交替排列的彩色光斑阵列，其中，第一方向（X-X'）为彩色光斑阵列的行方向或列方向。

Description

背光源及液晶显示装置
本申请要求于2017年3月20日提交中国专利局、申请号为201720273714.9、申请名称为“一种背光源及液晶显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及显示技术领域，尤其涉及一种背光源及液晶显示装置。
背景技术
LCD(Liquid Crystal Display，液晶显示器)作为一种平板显示装置，因其具有体积小、功耗低、无辐射以及制作成本相对较低等特点，而越来越多地被应用于高性能显示领域当中。
如图1所示，现有的LCD包括背光源01和显示面板02。一般的，背光源01发出的光线为白光。因此，为了实现彩色显示，需要在显示面板01中设置彩膜层021。该彩膜层021包括第一颜色图案层0211，第二颜色图案层0212和第三颜色图案层0213。当背光源01发出的白光透过液晶层入射至彩膜层021时，透过各颜色图案层的光线中与该颜色图案层颜色不同的光线被吸收，与该颜色图案层颜色相同的光线能够透过，从而实现彩色显示。
然而，由于当白光透过各颜色图案层时，仅有与该颜色图案层颜色相同的光线能够透过，而与该颜色图案层颜色不同的光线则被吸收，导致该显示装置对光的利用率较低，进而导致能耗较高。
发明内容
本公开的实施例采用如下技术方案：
本公开实施例一方面提供一种背光源，包括设置于衬底基板上的至少三种不同颜色的多个光源，以及设置于所述多个光源的出光侧的与所述多个光源一一对应的多个光栅单元，所述多个光栅单元中的每一个用于对所述多个光源中对应的一个发出的光线进行分束以形成均匀分布的单色光斑阵列，以使得所述背光源可形成沿第一方向上至少三种不同颜色光斑依次交替排列的彩色光斑阵列，其中，所述第一方向为所述彩色光斑阵列的行方向或列方向。
进一步的，所述多个光栅单元为达曼光栅。
进一步的，所述背光源还包括位于所述多个光源与所述多个光栅单元的之间的与所述多个光源一一对应的多个透镜，所述多个透镜中的每一个用于汇聚所述多个光源中对应的一个发出的光线。
进一步的，所述多个光源为准直光源。
进一步的，所述多个透镜与所述多个光源为一体式结构；或者，所述多个透镜与所述多个光源为组装结构。
进一步的，所述多个透镜为非球面透镜、菲涅尔透镜或梯度折射率透镜。
进一步的，在所述多个透镜与所述多个光源为组装结构的情况下，所述多个透镜中的至少一部分为一体式结构。
进一步的，所述至少三种不同颜色的多个光源包括多个第一颜色光源，多个第二颜色光源和多个第三颜色光源；且所述多个第一颜色光源、所述多个第二颜色光源、所述多个第三颜色光源沿所述第一方向依次交替排列。
进一步的，所述多个光栅单元为一体式结构。
本公开实施例另一方面还提供一种液晶显示装置，包括上述任一种背光源，所述背光源形成的光斑阵列对应于该显示装置的亚像素阵列。
附图说明
为了更清楚地说明本公开实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术提供的一种液晶显示装置的结构示意图；
图2为本公开实施例提供的一种背光源的结构示意图；
图3为图2中的背光源形成的光斑阵列的示意图；
图4为本公开实施例提供的一种透过达曼光栅形成光斑阵列的示意图；
图5为本公开实施例提供的一种形成单一颜色光斑阵列的结构单元示意图；
图6a为本公开实施例提供的一种液晶显示装置的结构示意图；
图6b为本公开实施例提供的另一种液晶显示装置的结构示意图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
本公开的实施例提供一种背光源及液晶显示装置，能够避免通过彩膜层进行滤光来实现彩色显示而导致的光利用率低的问题。
本公开实施例提供一种背光源及液晶显示装置，包括设置于衬底基板上的至少三种不同颜色的多个光源，以及设置于多个光源的出光侧的与多个光源一一对应的多个光栅单元。多个光栅单元中的每一个用于对多个光源中对应的一个发出的光线进行分束以形成均匀分布的单色光斑阵列，以使得背光源可形成沿第一方向上至少三种不同颜色光斑依次交替排列的彩色光斑阵列，其中，第一方向为彩色光斑阵列的行方向或列方向。这样一来，当该背光源用于液晶显示装置时，该背光源形成的光斑阵列与该显示装置的亚像素阵列相对应。即，沿第一方向上三种颜色光斑依次交替排列的光斑对应该显示装置中第一方向的三种颜色依次交替排列的亚像素。从而，能够避免采用彩膜层进行滤光来实现彩色显示，进而提高了对该背光源的光利用率。
本公开实施例提供一种背光源，如图2所示，该背光源01包括设置于衬底基板10上的至少三种不同颜色的多个光源101，以及设置于多个光源101的出光侧的与多个光源101一一对应的多个光栅单元102。该多个光栅单元102中的每一个用于对多个光源101中对应的一个发出的光线进行分束以形成均匀分布的单色光斑阵列，如图3所示，以使得该背光源01可形成沿第一方向X-X’上至少三种不同颜色光斑依次交替排列的彩色光斑阵列，其中，第一方向X-X’为该光斑阵列的行方向或列方向。
需要说明的是，第一，上述至少三种不同颜色的多个光源101可以是包括第一颜色光源，例如红色光源(R)，第二颜色光源，例如绿色光源(G)，第三颜色光源，例如蓝色光源(B)，当然还可以包括 其他颜色光源，例如黄色光源、蓝绿色光源等。具体的，不同颜色的光源可以选用红、绿、蓝三色的发光二极管(Light Emitting Diode，简称LED)。本公开对此不作限定，只要在该背光源应用于显示装置时，能够满足彩色显示即可。
第二，上述单色光斑阵列可以是一维光斑阵列，也可以是二维光斑阵列。当该单色光斑阵列为一维光斑阵列时，该背光源中包括多个该颜色的光源，以满足显示需求。为了避免设置过多的光源，可选的，上述单色光斑阵列为二维光斑阵列。另外，上述彩色光斑阵列可以是一维光斑阵列，也可以是二维光斑阵列。当该彩色光斑阵列为一维光斑阵列时，在应用于显示装置时，需要设置多个背光源。可选的，一般设置该彩色光斑阵列为二维光斑阵列，采用一个背光源即可满足显示需求。
第三，上述沿第一方向X-X’上至少三种不同颜色光斑依次交替排列的彩色光斑阵列是指，该彩色光斑阵列中所有行的光斑均为至少三种不同颜色光斑依次交替排列而成，或者彩色光斑阵列中所有列的光斑均为至少三种不同颜色光斑依次交替排列而成。本公开对此不作限定，在实际应用中，可以根据实际的需要进行选择设置。例如图3所示，一般多选择上述第一方向X-X’为该彩色光斑阵列的行方向。即，在该彩色光斑阵列中每行光斑均为三种不同颜色光斑依次交替排列而成，且可选的在与第一方向X-X’垂直的方向(即列方向)上为同一颜色光斑。
这样一来，当该背光源用于液晶显示装置时，该背光源形成的光斑阵列与该显示装置的亚像素阵列相对应。即，沿第一方向上三种颜色光斑依次交替排列的光斑对应该显示装置中第一方向的三种颜色依次交替排列的亚像素，从而能够避免采用彩膜层进行滤光来实现彩色显示，进而提高了对该背光源的光利用率。
在此基础上，为了更好的实现对光线的分束，可选的，采用达曼光栅作为上述多个光栅单元102。图4所示为光线透过达曼光栅后能够形成的均匀分布的光斑阵列。当然由于达曼光栅自身的结构，一般在形成的光斑阵列的中心位置光斑亮度较大，从而可能对在显示应用中画面的亮度均匀性造成一定的影响。因此在实际的应用中，可以采用较为理想的平面波入射，还可以对光栅进行优化，以保证光线透过达曼光栅后能够形成等间距等光强光斑阵列。当然本公开并不限定于此，实际应用 中也可以选择其他的光栅来实现光线的分束。以下实施例均是以达曼光栅为例对本公开做进一步的说明。
进一步的，为了便于安装，且减小安装误差，本公开可选的，所有多个光栅单元102为一体式结构。即，所有多个光源101对应的多个光栅单元102为一个整体的光栅层，在装配时根据预设的多个光栅单元与多个光源的对应位置，直接进行装配。
另外，为了避免入射至光栅的光线比较分散，保证入射光线比较汇聚，以使得形成的光斑阵列均匀分布，可以如图5所示(图5仅是以形成单一颜色光斑阵列的结构单元为例进行说明的)，上述背光源01中还包括位于多个光源101与多个光栅单元102之间的与多个光源101一一对应的多个透镜103。该多个透镜103中的每一个用于汇聚多个光源101中对应的一个发出的光线，以使得汇聚后的光线入射至多个光栅单元102中对应的一个，保证形成的光斑阵列均匀分布。当然，也可以不采用多个透镜103，而选择多个光源101为准直光源，同样能够保证形成的光斑阵列均匀分布。本公开对此不作限定，在实际的应用中可以根据实际的需要进行选择设置。
在此基础上，对于背光源01如图5所示，在多个光源101与多个光栅单元102之间设有与多个光源101一一对应的多个透镜103的情况下，该多个透镜103中的每一个可以与多个光源101中对应的一个为一体式结构。即，在加工制作多个光源101中的每一个的过程中，同时制作多个透镜103中对应的一个。当然，该多个透镜103也可以与多个光源101组装结构，即多个光源101中的每一个和多个透镜103中对应的一个分别制作加工好后，进行组装。
进一步的，在该多个透镜103与多个光源101组装结构的情况下，可选的，多个透镜103中的至少一部分为一体式结构。即，可以是该背光源中的多个透镜103中的一部分，也可以是多个透镜103中的全部，为一个整体的透镜层。在装配时根据预设的多个透镜103、多个光源101以及多个光栅单元102的对应位置，直接进行装配，以减小因多次装配单个透镜造成的误差较大的弊端，同时可简化安装工艺。
另外，上述多个透镜103可以选用非球面透镜、菲涅尔透镜或梯度折射率透镜，本公开对此不作限定，可以根据实际的需要进行选择， 只要能够满足对光线的汇聚即可。
更进一步的，为了满足各种尺寸的显示装置，例如大尺寸的显示装置，背光源相应的也需要选用大尺寸结构。在此情况下，该背光源01中可以包括多个第一颜色光源，多个第二颜色光源和多个第三颜色光源，以使得该多个光源形成的光斑阵列满足大尺寸显示装置的需求。
在此基础上，为了保证多个光源形成均匀的光斑阵列，且简化光源的安装，可选的，多个第一颜色光源、多个第二颜色光源、多个第三颜色光源沿第一方向X-X’依次交替排列。
本公开实施例还提供一种液晶显示装置，如图6a和6b所示，该液晶显示装置包括显示面板02和前述的任一种背光源01。该背光源01形成的光斑阵列对应于该显示装置的亚像素阵列。该液晶显示装置包括了与前述实施例提供的背光源相同的结构，并具有相同的有益效果。由于前述实施例已经对背光源的结构和有益效果进行了详细的描述，此处不再赘述。
需要说明的是，如图6a所示，上述显示面板02可以不设置彩膜层021，对应颜色的光斑与对应颜色的亚像素对应即可实现彩色显示。例如，图6a中红色光源形成的红色光斑与显示面板中的红色亚像素(R)对应。当然在此情况下，在能够通过不设置彩膜层实现彩色显示，提高光利用率的同时，还能够降低该显示装置的整体厚度，符合显示装置轻薄化设计的理念。
当然，如图6b所示，为了保证该显示装置显示画面的色彩饱和度以及画面对比度，也可以设置彩膜层021。在此情况下，第一颜色的光斑入射至彩膜层021中的第一颜色图案层0211，例如，图6b中红色光源形成的红色光斑对应入射至彩膜层021中的红色图案层；第二颜色的光斑入射至彩膜层021中的第二颜色图案层0212；第三颜色的光斑入射至彩膜层021中的第三颜色图案层0213。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。
本发明还可提供附加的实施例，这些附加实施例可以包括上述任何一个 实施例，且该附加实施例中的组件、功能或结构中的一个或多个可以由上述任一不同的实施例中的组件、功能或结构中的一个或多个替换或补充。

Claims (10)

  1. 一种背光源，包括设置于衬底基板上的至少三种不同颜色的多个光源，以及设置于所述多个光源的出光侧的与所述多个光源一一对应的多个光栅单元，所述多个光栅单元中的每一个用于对所述多个光源中对应的一个发出的光线进行分束以形成均匀分布的单色光斑阵列，以使得所述背光源可形成沿第一方向上至少三种不同颜色光斑依次交替排列的彩色光斑阵列，其中，所述第一方向为所述彩色光斑阵列的行方向或列方向。
  2. 根据权利要求1所述的背光源，其中，所述多个光栅单元为达曼光栅。
  3. 根据权利要求1所述的背光源，其中，所述背光源还包括位于所述多个光源与所述多个光栅单元之间的与所述多个光源一一对应的多个透镜，所述多个透镜中的每一个用于汇聚所述多个光源中对应的一个发出的光线。
  4. 根据权利要求1所述的背光源，其中，所述多个光源为准直光源。
  5. 根据权利要求3所述的背光源，其中，所述多个透镜与所述多个光源为一体式结构；或者，所述多个透镜与所述多个光源为组装结构。
  6. 根据权利要求3所述的背光源，其中，所述多个透镜为非球面透镜、菲涅尔透镜或梯度折射率透镜。
  7. 根据权利要求5所述的背光源，其中，在所述多个透镜与所述多个光源为组装结构的情况下，所述多个透镜中的至少一部分为一体式结构。
  8. 根据权利要求1所述的背光源，其中，所述至少三种不同颜色的多个光源包括多个第一颜色光源，多个第二颜色光源和多个第三颜色光源；且所述多个第一颜色光源、所述多个第二颜色光源、所述多个第三颜色光源沿所述第一方向依次交替排列。
  9. 根据权利要求1-8任一项所述的背光源，其中，所述多个光栅单元为一体式结构。
  10. 一种液晶显示装置，包括权利要求1-9任一项所述的背光源，所述背光源形成的光斑阵列对应于该显示装置的亚像素阵列。
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