WO2017036075A1 - 一种液晶显示装置 - Google Patents

一种液晶显示装置 Download PDF

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Publication number
WO2017036075A1
WO2017036075A1 PCT/CN2016/071763 CN2016071763W WO2017036075A1 WO 2017036075 A1 WO2017036075 A1 WO 2017036075A1 CN 2016071763 W CN2016071763 W CN 2016071763W WO 2017036075 A1 WO2017036075 A1 WO 2017036075A1
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Prior art keywords
liquid crystal
light
crystal panel
sub
display device
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PCT/CN2016/071763
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English (en)
French (fr)
Inventor
金起满
郑喆奎
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京东方科技集团股份有限公司
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Priority to US15/527,857 priority Critical patent/US20180348421A1/en
Publication of WO2017036075A1 publication Critical patent/WO2017036075A1/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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F1/133617—Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
    • 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
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue 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
    • 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
    • G02F2201/305—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating diffraction grating
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/36—Micro- or nanomaterials

Definitions

  • Embodiments of the present disclosure relate to a liquid crystal display device.
  • the structure of the TN mode liquid crystal display device is as shown in FIG. 1, and the backlight module uses a white light source 03.
  • the light incident on the light guide plate 02 has a certain exit angle limitation when the light guide plate 02 is led out.
  • the light is still disordered when the light guide plate 02 is led out, resulting in the liquid crystal molecules 011 in the liquid crystal layer of the liquid crystal panel 01 being in an initial orientation state.
  • the angle between the light passing through the liquid crystal layer of the liquid crystal panel 01 and the long axis of the liquid crystal molecules 011 in the liquid crystal layer is large, thereby causing the liquid crystal molecules 011 to The phase delay amount of the light is different.
  • At least one embodiment of the present disclosure provides a liquid crystal display device having a higher display quality in which the control accuracy of the bright state and the dark state of each pixel unit and the color is high.
  • At least one embodiment of the present disclosure provides a liquid crystal display device including a liquid crystal panel and a backlight module on a light incident side of the liquid crystal panel, the liquid crystal panel including a plurality of arrays of sub-pixels, the backlight module
  • the group includes a light guide plate and a light source, wherein:
  • the light source is a monochromatic light source
  • the light guide plate is provided with a grating, and the ratio of the period of the grating to the peak wavelength of the light emitted by the light source is greater than or equal to 0.5 and less than or equal to 1, so as to limit the incident angle of the light incident on the liquid crystal panel within a set range;
  • the light-emitting side of the liquid crystal panel is provided with a light conversion module for converting the color of the light to the color to be displayed by each sub-pixel when the light emitted by the light source passes through each sub-pixel.
  • the setting range is -15° or more and +15° or less.
  • the light guide plate is provided with the grating toward one side of the liquid crystal panel; and/or,
  • the grating is provided on a side of the light guide plate facing away from the liquid crystal panel.
  • the light guide plate is made of an acrylic material PMMA, or a polycarbonate material PC.
  • the grating is made of the same material as the light guide plate, or the grating is made of a metal material.
  • the sub-pixels include red sub-pixels, green sub-pixels, and blue sub-pixels
  • the light source is a blue monochromatic light source.
  • the optical conversion module provided by the liquid crystal panel includes:
  • a first quantum dot luminescent layer corresponding to each of the red sub-pixels, the first quantum dot luminescent layer emitting red light when excited by blue light;
  • a second quantum dot luminescent layer corresponding to each of the green sub-pixels, the second quantum dot layer emitting green light when excited by blue light.
  • the optical conversion module of the liquid crystal panel further includes:
  • red filter layer disposed on a side of the first quantum dot layer facing away from the backlight module and corresponding to the red sub-pixel;
  • a green filter layer disposed on the side of the second quantum dot layer facing away from the backlight module and corresponding to the green sub-pixel.
  • the light conversion module further includes a blue filter layer corresponding to the blue sub-pixel.
  • the first quantum layer and the second quantum layer are doped with light scattering particles; and/or the red filter layer, the green filter layer, and the blue filter layer are mixed. There are light scattering particles.
  • the light source used in the backlight module is a monochromatic light source, and the diffraction phenomenon of the light is used.
  • the ratio of the period of the grating provided by the light guide plate to the wavelength peak of the light emitted by the light source is greater than or equal to 0.5 and less than or equal to 1, the grating
  • the monochromatic light emitted by the monochromatic light source can have a better concentrating effect, and the incident angle of the light incident on the liquid crystal panel can be limited to a set range, so that the liquid crystal
  • the liquid crystal layer of the panel has a small difference in phase retardation of all the light incident on the liquid crystal panel, and improves the display precision of the liquid crystal panel for the bright state and the dark state of each pixel unit; and the optical conversion module provided on the liquid crystal panel can The light of the sub-pixels whose colors are different from the color of the monochromatic light emitted by the light source is converted into light that matches the color of each sub-pixel, and the control precision of the display color
  • FIG. 1 is a schematic structural view of a liquid crystal display device of a TN mode in a conventional technique
  • FIG. 2 is a schematic structural view of a liquid crystal display device according to an embodiment of the present disclosure.
  • an embodiment of the present disclosure provides a liquid crystal display device including a liquid crystal panel 1 and a backlight module on the light incident side of the liquid crystal panel 1.
  • the liquid crystal panel 1 includes a plurality of sub-pixels distributed in an array.
  • the backlight module includes a light guide plate 2 and a light source 3, wherein:
  • the light source 3 is a monochromatic light source
  • the light guide plate 2 is provided with a grating 21, and the ratio of the period of the grating 21 to the peak wavelength of the light emitted by the light source 3 is greater than or equal to 0.5 and less than or equal to 1, so as to limit the incident angle of the light incident on the liquid crystal panel 1 within a set range;
  • the light-emitting side of the liquid crystal panel 1 is provided with a light conversion module 12 for converting the color of the light into the color to be displayed by each sub-pixel when the light emitted by the light source 3 passes through each sub-pixel.
  • the light source 3 used in the backlight module is a monochromatic light source, and the ratio of the period of the grating 21 provided by the light guide plate 2 to the peak wavelength of the light emitted by the light source 3 is greater than or equal to 0.5 and less than or equal to At 1 o'clock, the grating 21 can compare the monochromatic light emitted by the monochromatic light source.
  • the light concentrating effect can further limit the incident angle of the light incident on the liquid crystal panel 1 within a set range, and retard the phase of all incident light rays of the liquid crystal panel 11 in the liquid crystal layer of the liquid crystal panel 1
  • the difference is small, and the display accuracy of the liquid crystal panel 1 for the bright state and the dark state of each pixel unit is improved; and the light conversion module 12 disposed on the light exiting side of the liquid crystal panel 1 can have a color different from the color of the monochromatic light emitted by the light source.
  • the light of the sub-pixels is converted into light that matches the color of each sub-pixel, and the control precision of the display color of each pixel unit can be improved.
  • the incident angle of the light having a larger incident angle after the light collecting by the grating is reduced, and further, the grating can limit the incident angle of the light incident on the liquid crystal panel 1 to Within the set range.
  • the light source 3 is set to be a blue monochromatic light source, and each pixel unit includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel. then:
  • the light conversion module corresponding to the red sub-pixel is capable of converting blue light into red light
  • the light conversion module corresponding to the green sub-pixel is capable of converting blue light into green light.
  • the incident angle is set to a range of -15° or more and +15° or less.
  • the grating 21 is disposed on a side thereof facing the liquid crystal panel 1, or the light guide plate 2 is away from the light guide plate 2.
  • One side of the liquid crystal panel 1 is provided with a grating;
  • the light guide plate 2 may be made of an acrylic material PMMA, or alternatively, may be made of a polycarbonate material PC.
  • the grating 21 is a grating made of a light-reflecting material.
  • the grating 21 and the light guide plate 2 may be made of the same material.
  • the grating 21 may be made of a metal material and may deposit metal directly on the light guide plate 2 and formed by a patterning process.
  • the sub-pixels included in the liquid crystal panel 1 include red sub-pixels, green sub-pixels, and blue sub-pixels, and the light source 3 is a blue monochromatic light source.
  • the light conversion module 12 disposed on the liquid crystal panel 1 may include:
  • a first quantum dot luminescent layer corresponding to each of the red sub-pixels, the first quantum dot luminescent layer emitting red light upon excitation of the blue light;
  • the first quantum dot luminescent layer in the light conversion module 12 is capable of emitting red light when excited by blue light, thereby providing red light to the red sub-pixel; and the second quantum dot luminescent layer can emit green light when excited by the blue light Further, the green sub-pixel is provided with green light; the blue light directly provides blue light to the blue sub-pixel, thereby enabling the liquid crystal display device to realize color display.
  • the optical conversion module 12 provided by the liquid crystal panel 1 further includes:
  • red filter layer disposed on a side of the first quantum dot layer facing away from the backlight module and corresponding to the red sub-pixel;
  • the green filter layer disposed on the side of the second quantum dot layer facing away from the backlight module and corresponding to the green sub-pixel.
  • the red filter layer can filter out the blue light that is not completely converted in the light emitted by the red sub-pixel, and the green filter layer can filter out the blue light that is not completely converted in the light emitted by the green sub-pixel, thereby improving
  • the color purity of the light emitted by the red sub-pixel and the green sub-pixel from the liquid crystal panel 1 improves the display effect of the liquid crystal display device.
  • the light conversion module 12 further includes a blue filter layer corresponding to the blue sub-pixel.
  • the first quantum layer and the second quantum layer are doped with light scattering particles; and/or ,
  • the red filter layer, the green filter layer, and the blue filter layer are doped with light-scattering particles.

Abstract

提供了一种液晶显示装置，包括液晶面板（1）和位于液晶面板（1）入光侧的背光模组，液晶面板（1）包括多个阵列分布的亚像素，背光模组包括导光板（2）和光源（3），其中：光源（3）为单色光源；导光板（2）上设有光栅（21），光栅（21）的周期与光源（3）发射光线的峰值波长之比大于等于0.5且小于等于1，以将射入液晶面板（1）的光线的入射角限定在设定范围内；液晶显示装置还包括设置在液晶面板（1）的出光侧的光转换模块（12），用于将光源（3）发射的光通过各亚像素时将光线的颜色转换为各亚像素所要显示的颜色。

Description

一种液晶显示装置 技术领域
本公开的实施例涉及一种液晶显示装置。
背景技术
在惯常技术中，TN模式的液晶显示装置的结构如图1所示，背光模组采用白色光源03。入射导光板02内的光线在导出导光板02时具有一定的出射角限制，但是，这些光在导出导光板02时仍然杂乱无章，导致无论液晶面板01的液晶层内的液晶分子011处于初始取向状态时还是在电场作用下处于偏转状态时，这些光在穿过液晶面板01的液晶层时与液晶层内液晶分子011的长轴之间的夹角的范围很大，进而导致液晶分子011对各光线的相位延迟量不同，TN模式的液晶显示装置在显示图像时，各像素单元很难实现标准的亮态和暗态，并且很难通过控制液晶分子的转向来实现对各像素单元显示颜色的精确控制，进而导致液晶显示装置显示图像的质量较差。
发明内容
本公开的至少一个实施例提供了一种液晶显示装置，该液晶显示装置具有较高的显示质量，其中，对各像素单元的亮态和暗态以及颜色的控制精度较高。
本公开的至少一个实施例提供了一种液晶显示装置，其包括液晶面板和位于所述液晶面板入光侧的背光模组，所述液晶面板包括多个阵列分布的亚像素，所述背光模组包括导光板和光源，其中：
所述光源为单色光源；
所述导光板上设有光栅，所述光栅的周期与光源发射光线的峰值波长之比大于等于0.5且小于等于1，以将射入液晶面板的光线的入射角限定在设定范围内；
所述液晶面板的出光侧设有光转换模块，用于将光源发射的光通过各亚像素时将光的颜色转换为各亚像素所要显示的颜色。
在本公开的一个实施例中，所述设定范围为大于等于-15°且小于等于+15°。
在本公开的一个实施例中，所述导光板朝向所述液晶面板的一面设有所述光栅；和/或，
所述导光板背离所述液晶面板的一面设有所述光栅。
在本公开的一个实施例中，所述导光板由亚克力材料PMMA、或聚碳酸酯材料PC制成。
在本公开的一个实施例中，所述光栅与所述导光板由相同的材料制成，或所述光栅由金属材料制成。
在本公开的一个实施例中，所述亚像素包括红色亚像素、绿色亚像素和蓝色亚像素，且所述光源为蓝色单色光源。
在本公开的一个实施例中，所述液晶面板设置的光转换模块包括：
与每一个所述红色亚像素对应的第一量子点发光层，所述第一量子点发光层在受到蓝色光的激发时发射红色光；和/或
与每一个所述绿色亚像素对应的第二量子点发光层，所述第二量子点层在受到蓝色光的激发时发射绿色光。
在本公开的一个实施例中，所述液晶面板设置的光转换模块还包括：
设置于所述第一量子点层背离所述背光模组一侧、且与所述红色亚像素对应的红色滤光层；和/或
设置于所述第二量子点层背离所述背光模组一侧、且与所述绿色亚像素对应的绿色滤光层。
在本公开的一个实施例中，所述光转换模块还包括与所述蓝色亚像素对应的蓝色滤光层。
在本公开的一个实施例中，所述第一量子层与第二量子层内参杂有光散射粒子；和/或，所述红色滤光层、绿色滤光层以及蓝色滤光层内参杂有光散射粒子。
上述液晶显示装置中，背光模组采用的光源为单色光源，利用光的衍射现象，当导光板设置的光栅的周期与光源发射光线的波长峰值之比大于等于0.5且小于等于1时，光栅能够对单色光源发射的单色光具有较佳的聚光效果，进而能够将射入液晶面板的光线的入射角限定在设定的范围内，使液晶 面板的液晶层对射入液晶面板的所有光线的相位延迟的差值较小，提高液晶面板对各像素单元的亮态和暗态的显示精度；并且，液晶面板上设置的光转换模块能够将颜色与光源发射的单色光颜色不同的亚像素的光转换为与各亚像素颜色匹配的光，能够提高对各像素单元显示颜色的控制精度。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1为惯常技术中TN模式的液晶显示装置的结构示意图；以及
图2为根据本公开的一个实施例的液晶显示装置的结构示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的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。
如图2所示，本公开的一个实施例提供了一种液晶显示装置，其包括液晶面板1和位于液晶面板1入光侧的背光模组，液晶面板1包括多个阵列分布的亚像素，背光模组包括导光板2和光源3，其中：
光源3为单色光源；
导光板2上设有光栅21，光栅21的周期与光源3发射光线的峰值波长之比大于等于0.5且小于等于1，以将射入液晶面板1的光线的入射角限定在设定范围内；
液晶面板1的出光侧设有光转换模块12，用于将光源3发射的光通过各亚像素时将光线的颜色转换为各亚像素所要显示的颜色。
上述液晶显示装置中，背光模组采用的光源3为单色光源，利用光的衍射现象，当导光板2设置的光栅21的周期与光源3发射光线的峰值波长之比大于等于0.5且小于等于1时，光栅21能够对单色光源发射的单色光具有较 佳的聚光效果，进而能够将射入液晶面板1的光线的入射角限定在设定的范围内，使液晶面板1的液晶层内的液晶分子11对液晶面板1的所有入射光线的相位延迟的差值较小，提高液晶面板1对各像素单元的亮态和暗态的显示精度；并且，设置在液晶面板1出光侧的光转换模块12能够将颜色与光源发射的单色光颜色不同的亚像素的光转换为与各亚像素颜色匹配的光，能够提高对各像素单元显示颜色的控制精度。
导光板2导出的光线在入射液晶面板时，入射角较大的光线在经过光栅的聚光作用之后的入射角减小了，进而，光栅能够将射入液晶面板1的光线的入射角限定在设定的范围内。
并且，为了便于对液晶面板1中光转换模块12的工作原理进行描述，设定上述光源3为蓝色单色光源，且每一个像素单元包括红色亚像素、绿色亚像素和蓝色亚像素，则：
与红色亚像素对应的光转换模块能够将蓝色光转换为红色光，与绿色亚像素对应的光转换模块能够将蓝色光转换为绿色光。
在本公开的一个实施例中，入射角的设定范围为大于等于-15°且小于等于+15°。
在本公开的一个实施例中，如图2所示，上述液晶显示装置的背光模块中的导光板2中，在其朝向液晶面板1的一面设有上述光栅21，或者，在导光板2背离液晶面板1的一面设有光栅；
当然，还可以是导光板2朝向液晶面板1的一面以及背离液晶面板1的一面均设有光栅。
在本公开的一个实施例中，上述导光板2可以由亚克力材料PMMA制成，可选择地，还可以由聚碳酸酯材料PC制成。
上述光栅21为反光性材料制成的光栅，例如，光栅21与导光板2可以由相同的材料制成。或者，光栅21还可以由金属材料材料制成，并且可以直接在导光板2上沉积金属并通过构图工艺形成。
在本公开的一个实施例中，液晶面板1中具有的亚像素包括红色亚像素、绿色亚像素和蓝色亚像素，且光源3为蓝色单色光源。
当上述光源3为蓝色单色光源时，例如，设置在液晶面板1上的光转换模块12可以包括：
与每一个红色亚像素对应的第一量子点发光层，第一量子点发光层在蓝色光的激发时发射红色光；以及
与每一个绿色亚像素对应的第二量子点发光层，第二量子点层在蓝色光的激发下发射绿色光。
光转换模块12中的第一量子点发光层能够在受到蓝色光的激发时发射红色光，进而为红色亚像素提供红色光；第二量子点发光层能够在受到蓝色光的激发时发射绿色光，进而为绿色亚像素提供绿色光；蓝色光线可以直接为蓝色亚像素提供蓝色光，进而能够使液晶显示装置实现彩色显示。
在本公开的一个实施例中，为了进一步提高每种颜色的亚像素射出光线的颜色的纯度，液晶面板1设置的光转换模块12还包括：
设置于第一量子点层背离背光模组一侧、且与红色亚像素对应的红色滤光层；和/或
设置于第二量子点层背离背光模组一侧、且与绿色亚像素对应的绿色滤光层。
红色滤光层能够将红色亚像素射出的光线中没有被完全转换的蓝色光过滤掉，同时，绿色滤光层能够将绿色亚像素射出的光线中没有被完全转换的蓝色光过滤掉，进而提高了红色亚像素和绿色亚像素射出液晶面板1的光线的色纯度，提高液晶显示装置的显示效果。
在本公开的一个实施例中，光转换模块12还包括与蓝色亚像素对应的蓝色滤光层。
为了提高光线在射出液晶面板1时的散射角度，进而提高液晶显示装置的可是视角，在本公开的一个实施例中，第一量子层与第二量子层内参杂有光散射粒子；和/或，
红色滤光层、绿色滤光层以及蓝色滤光层内参杂有光散射粒子。
以上所述仅是本公开的示范性实施方式，而非用于限制本公开的保护范围，本公开的保护范围由所附的权利要求确定。
本公开要求于2015年8月31日递交的中国专利申请第201510549344.2号的优先权，在此全文引用上述中国专利申请公开的内容以作为本公开的一部分。

Claims (10)

  1. 一种液晶显示装置，包括液晶面板和位于所述液晶面板入光侧的背光模组，所述液晶面板包括多个阵列分布的亚像素，所述背光模组包括导光板和光源，其中：
    所述光源为单色光源；
    所述导光板上设有光栅，所述光栅的周期与光源发射光线的峰值波长之比大于等于0.5且小于等于1，以将射入液晶面板的光线的入射角限定在设定范围内；以及
    所述液晶面板的出光侧设有光转换模块，用于将光源发射的光通过各亚像素时将光线的颜色转换为各亚像素所要显示的颜色。
  2. 根据权利要求1所述的液晶显示装置，其中，所述入射角的设定范围为大于等于-15°且小于等于+15°。
  3. 根据权利要求1或2所述的液晶显示装置，其特征在于，所述导光板朝向所述液晶面板的一面设有所述光栅；和/或，
    所述导光板背离所述液晶面板的一面设有所述光栅。
  4. 根据权利要求1至3中任何一项所述的液晶显示装置，其中，所述导光板的制备材料为亚克力材料PMMA、或聚碳酸酯材料PC。
  5. 根据权利要求1至4中任何一项所述的液晶显示装置，其中，所述光栅与所述导光板由相同材料制成，或所述光栅由金属材料制成。
  6. 根据权利要求1-5中任何一项所述的液晶显示装置，其中，所述亚像素包括红色亚像素、绿色亚像素和蓝色亚像素，且所述光源为蓝色单色光源。
  7. 根据权利要求1至6中任何一项所述的液晶显示装置，其中，所述液晶面板设置的光转换模块包括：
    与每一个所述红色亚像素对应的第一量子点发光层，所述第一量子点发光层在受到蓝色光的激发时发射红色光；
    与每一个所述绿色亚像素对应的第二量子点发光层，所述第二量子点层在受到蓝色光的激发下发射绿色光。
  8. 根据权利要求7所述的液晶显示装置，其中，所述液晶面板设置的光转换模块还包括：
    设置于所述第一量子点层背离所述背光模组一侧、且与所述红色亚像素对应的红色滤光层；以及
    设置于所述第二量子点层背离所述背光模组一侧、且与所述绿色亚像素对应的绿色滤光层。
  9. 根据权利要求8所述的液晶显示装置，其中，所述光转换模块还包括与所述蓝色亚像素对应的蓝色滤光层。
  10. 根据权利要求8所述的液晶显示装置，其中，所述第一量子层与第二量子层内参杂有光散射粒子；和/或，
    所述红色滤光层、绿色滤光层以及蓝色滤光层内参杂有光散射粒子。
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