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WO2019019570A1 - 量子点液晶面板及液晶显示装置 - Google Patents

量子点液晶面板及液晶显示装置 Download PDF

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Publication number
WO2019019570A1
WO2019019570A1 PCT/CN2018/072994 CN2018072994W WO2019019570A1 WO 2019019570 A1 WO2019019570 A1 WO 2019019570A1 CN 2018072994 W CN2018072994 W CN 2018072994W WO 2019019570 A1 WO2019019570 A1 WO 2019019570A1
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Prior art keywords
pixel unit
liquid crystal
excitation light
blue
red
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English (en)
French (fr)
Inventor
李富琳
刘卫东
宋志成
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Qingdao Hisense Electronics Co Ltd
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Qingdao Hisense Electronics Co Ltd
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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
    • G02F1/133509—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
    • G02F1/133602—Direct backlight

Definitions

  • Embodiments of the present disclosure relate to the field of optical technologies, and in particular, to a quantum dot liquid crystal panel and a liquid crystal display device.
  • liquid crystal display devices As a display device with small radiation, low energy consumption, and light weight, liquid crystal display devices have been widely used. At present, not only computer monitors widely use liquid crystal displays, but also almost all televisions that provide multimedia broadcast services on the market are LCD TV. In order to improve the color gamut of the display, the related art uses a quantum dot conversion layer instead of the conventional color filter to realize display of a high color gamut.
  • a liquid crystal display device including: a light source mechanism, and a liquid crystal layer and a color conversion layer, the liquid crystal layer being provided with a plurality of interval sections, each of the plurality of interval sections being Each pixel unit of the color conversion layer corresponds to and is externally provided with a switch, and the two ends of the green pixel unit in the color conversion layer are adjacent to the red pixel unit; the two ends of the blue pixel unit are adjacent to the red pixel unit; One end of the red pixel unit is adjacent to the blue pixel unit, and the other end is adjacent to the green pixel unit.
  • a quantum dot liquid crystal panel including: a liquid crystal layer and a quantum dot conversion layer disposed on a light exiting side of the liquid crystal layer, wherein the liquid crystal layer is provided with a plurality of interval intervals, in the plurality of interval intervals
  • Each of the pixel units corresponding to the quantum dot conversion layer and externally disposed with a switch wherein the green pixel unit in the quantum dot conversion layer is adjacent to a red pixel unit; the blue pixel unit The two ends are adjacent to the red pixel unit; the red pixel unit is adjacent to the blue pixel unit at one end, and the green pixel unit is adjacent to the other end.
  • FIG. 1 is a schematic structural view of a direct type liquid crystal display device provided in the related art
  • FIG. 2 is a schematic structural diagram of a liquid crystal display device according to some embodiments of the present disclosure.
  • FIG. 3 is a schematic structural diagram of a direct type liquid crystal display device according to some embodiments of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a side-entry liquid crystal display device according to some embodiments of the present disclosure.
  • FIG. 5 is a graph showing a switching cycle of a backlight source and a pixel unit according to some embodiments of the present disclosure.
  • a direct type liquid crystal display device provided in the related art, as shown in FIG. 1, includes a blue backlight source 11, a color conversion layer 13, and a liquid crystal layer 12 disposed between the blue backlight source 11 and the color conversion layer 13.
  • the color conversion layer 13 is provided with a red pixel unit 131, a green pixel unit 132, and a transparent pixel unit 133, and each pixel unit is adjacent to two other pixel units, and the liquid crystal layer 12 includes a black matrix and a black matrix.
  • the black matrix forms a plurality of interval sections, each of which is provided with a liquid crystal material, and a switch is disposed outside, and each interval corresponds to one unit of the color conversion layer 13, and the switch may be a driving electrode or a thin film transistor.
  • TFT TFT
  • the blue backlight source 11 emits blue excitation light
  • the switch of the interval of the liquid crystal layer 12 corresponding to the red pixel unit 131 is turned on, the blue excitation light is irradiated to the red pixel unit 131 through the liquid crystal material, and the red pixel unit 131
  • the red quantum dot material absorbs the blue excitation light to emit light
  • the specific operation of turning on the switch is to apply a preset voltage on the TFT to change the liquid crystal molecules of the liquid crystal layer 12 from the opaque state to the transparent state.
  • the switch of the interval of the liquid crystal layer 12 corresponding to the green pixel unit 132 is turned on, the blue excitation light is irradiated to the green pixel unit 132 through the liquid crystal material, and the green quantum dot material in the green pixel unit 132 absorbs the blue excitation light and emits light. .
  • the switch of the interval of the liquid crystal layer 12 corresponding to the transparent pixel unit 133 is opened, and the blue excitation light passes through the liquid crystal material and is directly emitted from the transparent pixel unit 133.
  • FIG. 1 is a schematic structural diagram of a direct type liquid crystal display device according to some embodiments of the present disclosure.
  • the blue backlight source 11 is disposed directly below the display screen, and the direction in which the excitation light is emitted faces the screen.
  • the liquid crystal display device may be a side-entry liquid crystal display device.
  • the blue backlight source 11 of the side-entry liquid crystal display device is disposed in one of the devices. Side.
  • FIG. 2 is a schematic structural diagram of a liquid crystal display device according to some embodiments of the present disclosure.
  • a liquid crystal display device provided by some embodiments of the present disclosure adopts a “three-color four-pixel” color conversion layer and cooperates with two colors of excitation light to enable a large angle of exit of the backlight source. It is still guaranteed that the light of each color will not be crosstalked.
  • the "three-color four-pixel” means using a minimum combination comprising three colors so that the positions of the four sub-pixels can be occupied.
  • a liquid crystal display device includes: a light source mechanism 21 for providing a backlight, a liquid crystal layer 22, and a color conversion layer 23 disposed on a light exiting side of the liquid crystal layer 22.
  • the light source mechanism 21 is provided with a blue excitation light source 211 and A red excitation light source 212, wherein the blue excitation light source 211 is used to provide blue excitation light and the red excitation light source 212 is used to provide red excitation light.
  • the color conversion layer 23 is provided with a red pixel unit 231, a green pixel unit 232, and a blue pixel unit 233. Both ends of each of the green pixel units 232 are adjacent to the red pixel unit 231.
  • each of the blue pixel units 233 are also adjacent to the red pixel unit 231.
  • One end of each red pixel unit 231 is adjacent to the green pixel unit 232, and the other end is adjacent to the green pixel unit 232.
  • the green pixel unit 232 is provided with a green quantum dot material for receiving the blue excitation light of the blue excitation light source 211 to emit light;
  • the red pixel unit 231 is provided with a filter for the red excitation light. The light is emitted under illumination;
  • the blue pixel unit 233 is for transmitting the blue excitation light of the blue excitation light source 211 to obtain blue excitation light.
  • the blue pixel unit may be a transparent material, a mixture of a transparent material and a scattering material, and may also be a blue filter.
  • the liquid crystal layer 22 and the color conversion layer 23 are disposed in parallel with each other, and the width of each pixel unit of the color conversion layer 23 is the same as the width of the interval interval of the liquid crystal layer 22, which corresponds completely, wherein each interval interval
  • the liquid crystal material is contained therein and a switch is externally provided, and the switch may be a driving electrode or a TFT.
  • the green quantum dot material in the green pixel unit 232 is irradiated by the blue excitation light, and the green quantum dot material is excited by the blue excitation light.
  • Glowing since the two ends of the green pixel unit 232 are the red pixel unit 231, and the filter in the red pixel unit 231 passes only the red light, the light of other wavelengths is filtered out, so even if the blue excitation light exits the angle Larger, the red pixel unit 231 is irradiated, and is also filtered by the filter in the red pixel unit 231, so that crosstalk does not occur.
  • the blue excitation light illuminates the blue pixel unit 233 and is emitted from the blue pixel unit 233 to obtain blue excitation light.
  • the blue pixel unit 233 is also a red pixel unit 231 at both ends, and therefore, the blue excitation light is not crosstalked.
  • the red pixel unit 231 is illuminated by the red excitation light and exits through the filter in the red pixel unit 231 to obtain red excitation light. Since the red pixel unit 231 is respectively the green pixel unit 232 and the blue pixel unit 233, and the red excitation light has a longer wavelength than the green excitation light, even if the red excitation light exit angle is large, the green pixel unit 232 is irradiated.
  • the red excitation light also fails to excite the green quantum dot material to emit light, and even if the red excitation light is irradiated to the blue pixel unit 233, if the blue pixel unit is transparent, the resulting outgoing light is also red excitation light, if the blue pixel unit When a blue color filter is provided, the red excitation light that is emitted to the blue pixel unit is absorbed. Therefore, it will not be crosstalked.
  • the liquid crystal display device of the present disclosure does not suffer from crosstalk when each pixel unit is irradiated to a pixel unit adjacent to the target pixel unit even if the exit angle of the backlight source is large. The problem is that the color of the image displayed by the liquid crystal display device is corrected, thereby improving the user experience.
  • the blue pixel unit 233 can also transmit red excitation light, that is, the red excitation light can be emitted through the red pixel unit 231 and the blue pixel unit 233, The red excitation light is obtained, so that the light extraction efficiency of the red excitation light can be improved.
  • the green pixel unit 232 of the color conversion layer 23 is provided with a dichroic layer on the side facing the liquid crystal layer 22, and has reflection characteristics only for the green excitation light band, and for other wavelength bands.
  • Light has high permeability. Therefore, the blue excitation light can be directly transmitted, and the blue excitation light excites the green quantum dot material to emit light. When scattering toward the liquid crystal layer 22, it is reflected to the screen direction and reused, thereby improving the green excitation light. Light extraction efficiency.
  • FIG. 3 is a schematic structural diagram of a direct type liquid crystal display device according to some embodiments of the present disclosure.
  • the light source mechanism 21 is disposed opposite to the light incident surface of the liquid crystal layer 22, and an optical film assembly 24 and a diffusion plate 25 are disposed between the liquid crystal layer 22 and the light source mechanism 21, wherein the optical film The sheet assembly 24 is disposed adjacent to the liquid crystal layer 22, and the diffusion plate 25 is disposed adjacent to the light source mechanism 21.
  • the specific structure of the light source mechanism 21 and the color conversion layer 23 is as shown in FIG. 2, and the detailed description is made with reference to the embodiment shown in FIG. 2, some embodiments of the present disclosure. Not to repeat.
  • the diffuser plate 25 is used to homogenize the excitation light of the light source mechanism 21, and the optical film assembly 24 is used to increase the brightness of the homogenized excitation light.
  • the specific structure and function of the diffuser plate 25 and the optical film assembly 24 are well known to those skilled in the art, and some embodiments of the present disclosure will not be described herein.
  • FIG. 4 is a schematic structural diagram of a side-entry liquid crystal display device according to some embodiments of the present disclosure.
  • a liquid crystal is provided.
  • the light incident surface of the layer 22 is sequentially provided with an optical film assembly 24, a light guide plate 26, and a reflection sheet 27, wherein the light source mechanism 21 emits excitation light from the side of the light guide plate 26 toward the light guide plate 26.
  • the specific structure of the light source mechanism 21 and the color conversion layer 23 is as shown in FIG. 2, and the detailed description is made with reference to the embodiment shown in FIG. 2, and some embodiments of the present disclosure are not described again.
  • the light guide plate 26 is used to guide the uniform distribution of the excitation light of the light source mechanism 21, and the reflection sheet 27 is used to reflect the light emitted from the light guide plate 26 to the direction of the light guide plate 26.
  • the specific structure and function of the light guide plate 26 and the reflection sheet 27 are well known to those skilled in the art, and some embodiments of the present disclosure will not be described herein.
  • the liquid crystal display device of some embodiments of the present disclosure uses a color conversion layer of “three colors and four pixels” and cooperates with the excitation light of two colors, even if the exit angle of the backlight source is large, and the target pixel unit is irradiated.
  • colors other than the target color are not generated, so that each color is not crosstalked, so that the color of the image displayed by the liquid crystal display device is corrected, thereby improving the user experience.
  • some embodiments of the present disclosure further provide a display method, which can be implemented by a program controlling a liquid crystal display device, and the program can be carried by a chip or a single chip microcomputer or the like. Some embodiments of the present disclosure are not described herein again.
  • the method specifically includes: when the blue excitation light source 211 is turned on, the red excitation light source 212 is turned off; when the red excitation light source 212 is turned on, the blue excitation light source 211 is turned off.
  • the switch of the interval corresponding to the green pixel unit 232 on the liquid crystal layer 22 is turned on, and the switch of the interval corresponding to the blue pixel unit 233 on the liquid crystal layer 22 is turned off; or, the liquid crystal layer 22
  • the switch corresponding to the green pixel unit 232 is turned off, and the switch of the interval section corresponding to the blue pixel unit 233 on the liquid crystal layer 22 is turned on.
  • the switch of the interval section corresponding to the red pixel unit 231 on the liquid crystal layer 22 is turned on.
  • a display period may be set in advance, which is a time period in which light of three colors is sequentially and completely displayed.
  • the trigger blue excitation light source 211 emits blue excitation light during the first 2/3 of the display period, and controls the switch corresponding to the green pixel unit 232 on the liquid crystal layer 22 at 2/3.
  • any one of 1/3 of the time period is turned on, and the switch corresponding to the blue pixel unit 233 on the liquid crystal layer 22 is controlled to be turned on for another 1/3 of the period of 2/3.
  • the red excitation light source 212 is triggered to emit red excitation light during a period of 1/3 of the preset display period, and the switch corresponding to the red pixel unit 231 on the liquid crystal layer 22 is controlled to open in the second 1/3 period.
  • the switching period of the interval section on the liquid crystal layer and the switching period of the backlight source have corresponding timing relationships.
  • the switch corresponding to the blue pixel unit 233 and the green pixel unit 232 on the liquid crystal layer 22 may be controlled as needed. At the same time, it is turned on, thereby exciting the blue pixel unit 233 and the green pixel unit 232 to emit light at the same time.
  • the foregoing description of the preset period is merely an optional embodiment of the present disclosure, and is not limited to some embodiments of the present disclosure.
  • the present disclosure may also exchange green in the first 2/3 period.
  • the display order of the pixel unit 232 and the blue pixel unit 233, or the blue excitation light source 211 and the red excitation light source 212 are displayed at other time periods. In other embodiments, some embodiments of the present disclosure are no longer Detailed.
  • the red excitation light source and the blue excitation light source may also be illuminated simultaneously, and the deflection of the liquid crystal molecules in the liquid crystal layer is controlled according to the image to be displayed.
  • the liquid crystal display device of some embodiments of the present disclosure is also provided with a light source mechanism, and a liquid crystal layer and a color conversion layer disposed in parallel with each other, however.
  • the light source mechanism provides two kinds of excitation light, blue excitation light and red excitation light
  • each green pixel unit of the color conversion layer is a red pixel unit; two ends of each blue pixel unit are adjacent to each other.
  • Each is a red pixel unit; each red pixel unit is adjacent to a blue pixel unit at one end and a green pixel unit adjacent to the other end.
  • the green pixel unit is provided with a green quantum dot material for receiving excitation of the blue excitation light to emit light
  • the red pixel unit is provided with a filter for filtering out light other than the red excitation light.
  • the blue excitation light is emitted from the blue pixel unit to obtain blue excitation light, and the two ends of each blue pixel unit are also red pixel regions, so that the blue excitation light does not generate color.
  • Crosstalk When the red excitation light illuminates the red pixel unit, since the red pixel unit is respectively a green pixel unit and a blue pixel unit, and the red excitation light has a longer wavelength than the green excitation light, the red excitation light cannot excite the green quantum.
  • the point material emits light.
  • the red excitation light is irradiated to the blue pixel unit, if the blue pixel unit is transparent, the resulting emitted light is also red excitation light, and if the blue pixel unit is provided with a blue color filter Then, the red excitation light that is emitted to the blue pixel unit is absorbed, so the red color is not crosstalked by other colors.
  • the present disclosure does not generate a color other than the target color when the pixel unit adjacent to the target pixel unit is irradiated even if the exit angle of the backlight source is large, so that each color is It is not crosstalked, so that the color of the image displayed by the liquid crystal display device is corrected, thereby improving the user experience.
  • the present disclosure also provides a quantum dot liquid crystal panel comprising: a liquid crystal layer and a quantum dot conversion layer disposed on a light exiting side of the liquid crystal layer, wherein the liquid crystal layer is provided with a plurality of interval intervals, each of the plurality of interval intervals Corresponding to each pixel unit of the quantum dot conversion layer and externally provided with a switch, wherein two ends of the green pixel unit in the quantum dot conversion layer are adjacent to a red pixel unit; A red pixel unit is disposed; one end of the red pixel unit is adjacent to the blue pixel unit, and the other end is adjacent to the green pixel unit.
  • the green pixel unit in the quantum dot liquid crystal panel is provided with a green quantum dot material to be excited to generate green fluorescence;
  • the red pixel unit is provided with a red filter to transmit red light in the backlight and absorb other The light of the color;
  • the blue pixel unit is provided with a transparent material that transmits all of the light in the backlight.
  • the green pixel unit in the quantum dot liquid crystal panel is provided with a green quantum dot material to be excited to generate green fluorescence;
  • the red pixel unit is provided with a red filter to transmit red light in the backlight and absorb other The light of the color;
  • the blue pixel unit is provided with a blue filter to transmit the blue light in the backlight and absorb the light of other colors.

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Abstract

一种量子点液晶面板及液晶显示装置，液晶显示装置包括：光源机构（21），以及液晶层（22）和颜色转换层（23），液晶层（22）设置多个间隔区间，多个间隔区间中的每个与颜色转换层（23）的每个像素单元相对应并且外部设置有开关，颜色转换层（23）中与绿色像素单元（232）两端相邻的是红色像素单元（231）；与蓝色像素单元（233）的两端相邻的是红色像素单元（231）；与红色像素单元（231）一端相邻的是蓝色像素单元（233），与另一端相邻的是绿色像素单元（232）。本方案与相关技术相比，即使背光光源的出射角度较大，照射到目标像素单元相邻的像素单元时，也不会发生颜色串扰，使得液晶显示装置所显示的图像颜色更正，进而能够提高用户的使用体验。

Description

量子点液晶面板及液晶显示装置
相关申请交叉引用
本申请要求于2017年07月24日提交中国专利局、申请号为201710606081.3、发明名称为“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
本公开实施例涉及光学技术领域，尤其涉及一种量子点液晶面板及液晶显示装置。
背景技术
该部分披露的信息仅作为和本公开相关的相关技术，不必然构成本公开的现有技术。
作为辐射小，能耗低，且体积轻薄的显示设备，液晶显示装置已经被广泛使用，目前，不仅计算机的显示器广泛采用液晶显示器，而且，市场上几乎全部提供多媒体播放服务的电视机，均是液晶电视。为了提高显示的色域，相关技术中使用量子点转换层替代传统的滤色片，实现了高色域的显示。
发明内容
本公开一些实施例提供了一种液晶显示装置，包括：光源机构，以及液晶层和颜色转换层，所述液晶层设置有多个间隔区间，所述多个间隔区间中的每个与所述颜色转换层的每个像素单元相对应并且外部设置有开关，所述颜色转换层中绿色像素单元两端相邻是红色像素单元；蓝色像素单元的两端相邻是所述红色像素单元；所述红色像素单元一端相邻的是所述蓝色像素单元，另一端相邻的是所述绿色像素单元。
本公开一些实施例提供了一种量子点液晶面板，包括：液晶层和设置在液晶层出光侧的量子点转换层，所述液晶层设置有多个间隔区间，所述多个间隔区间中的每个与所述量子点转换层的每个像素单元相对应并且外部设置有开关，其特征在于，所述量子点转换层中绿色像素单元两端相邻是红色像素单元；蓝色像素单元的两端相邻是所述红色像素单元；所述红色像素单元一端相邻的是所述蓝色像素单元，另一端相邻的是所述绿色像素单元。
附图说明
为了更清楚地说明本公开一些实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，对于本领域技术人员而言，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为相关技术中提供的一种直下式液晶显示装置的结构示意图；
图2为本公开一些实施例提供的液晶显示装置的结构示意图；
图3为本公开一些实施例提供的直下式液晶显示装置的结构示意图；
图4为本公开一些实施例提供的侧入式液晶显示装置的结构示意图；
图5为本公开一些实施例提供的背光光源与像素单元的开关周期曲线图。
具体实施方式
为使本公开一些实施例的目的、技术方案和优点更加清楚，下面将结合本公开一些实施例中的附图，对本公开一些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。
相关技术中提供的一种直下式液晶显示装置如图1所示，包括蓝色背光光源11，颜色转换层13，以及设置在蓝色背光光源11和颜色转换层13之间的液晶层12。其中，颜色转换层13设置有红色像素单元131、绿色像素单元132和透明像素单元133，且每个像素单元两端均与其他两个像素单元邻接，液晶层12包括黑色矩阵(Black Matrix)和液晶材料，黑色矩阵形成多个间隔区间，每个间隔区间内装有液晶材料，外部设置有开关，且每个间隔区间与颜色转换层13的一个单元对应，所述开关可以为驱动电极或薄膜晶体管(TFT)。在默认状态下，液晶层12的所有间隔区间均关闭，此时间隔区间中的液晶分子处于不透光的状态。在工作时，蓝色背光光源11发出蓝色激发光，红色像素单元131对应的液晶层12间隔区间的开关打开时，蓝色激发光穿过液晶材料照射到红色像素单元131，红色像素单元131中的红色量子点材料吸收蓝色激发光而发光，所述将开关打开的具体操作为在TFT上施加预设电压从而将液晶层12的液晶分子由不透光的状态变为透光的状态。同样的，绿色像素单元132对应的液晶层12间隔区间的开关打开，蓝色激发光穿过液晶材料照射到绿色像素单元132，绿色像素单元132中的绿色量子点材料吸收蓝色激发光而发光。透明像素单元133对应的液晶层12间隔区间的开关打开，蓝色激发光穿过液晶材料并从透明像素单元133直接出射。
图1为本公开一些实施例提供的一种直下式液晶显示装置的结构示意图。如图1所示，蓝色背光光源11设置在显示屏的正下方，激发光的出射方向朝向屏幕的方向。除了图1所示的直下式液晶显示装置以外，液晶显示装置还可以是侧入式液晶显示装置，不同于直下式液晶显示，侧入式液晶显示装置的蓝色背光光源11设置在装置的一个侧边。
图2为本公开一些实施例提供的液晶显示装置的结构示意图。如图2所示，本公开一些实施例提供的液晶显示装置，采用“三色四像素”的颜色转换层，并配合两个颜色的激发光，能够在背光光源的出射角度较大的情况下，依然保证每种颜色的光均不会被串扰。所述“三色四像素”意味着使用包含三种颜色的最小组合从而可以占据四个子像素的位置。
本公开一些实施例提供的液晶显示装置包括：用于提供背光的光源机构21，液晶层22和设置在液晶层22出光侧的颜色转换层23，光源机构21设置有蓝色激发光光源211和红色激发光光源212，其中，蓝色激发光光源211用于提供蓝色激发光，红色激发光光源212用于提供红色激发光。颜色转换层23设置有红色像素单元231、绿色像素单元232和蓝色像素单元233。每个绿色像素单元232的两端均邻接红色像素单元231，每个蓝色像素单元233的两端也均邻接红色像素单元231，每个红色像素单元231的一端邻接绿色像素单元232，另一端邻接蓝色像素单元233。并且，绿色像素单元232设置有绿色量子点材料，用于接收蓝色激发光光源211的蓝色激发光而发光；红色像素单元231设置有滤光片，滤光片用于在红色激发光的照射下发光；蓝色像素单元233用于透射蓝色激发光光源211的蓝色激发光，得到蓝色激发光。
在一些实施例中蓝色像素单元可以是透明材料，也可以是透明材料和散射材料的混合体，还可以是蓝色滤光片。
在一些实施例中液晶层22和颜色转换层23相互平行设置，并且，颜色转换层23的每个像素单元的宽度与液晶层22的间隔区间的宽度相同，其完全对应，其中每个间隔区间内装有液晶材料且外部设置有开关，该开关可以是驱动电极或TFT。
其中，根据上述像素单元之间的位置关系，以及每个颜色的像素单元的属性，通过蓝色激发光照射绿色像素单元232中的绿色量子点材料，绿色量子点材料受到蓝色激发光激发而发光。其中，由于绿色像素单元232的两端是红色像素单元231，而红色像素单元231中的滤光片，仅通过红色光，其他波长的光均被滤除，因此，即使蓝色激发光出射角度较大，照射到红色像素单元231，也会被红色像素单元231中的滤光片滤除，因此，不会产生串扰。同样的，蓝色激发光照射蓝色像素单元233，并从蓝色像素单元233出射，得到蓝色激发光。而根据上述描述可知，蓝色像素单元233两端也是红色像素单元231，因此， 蓝色激发光也不会被串扰。通过红色激发光照射红色像素单元231，并穿过红色像素单元231中的滤光片出射，得到红色激发光。由于红色像素单元231两端分别是绿色像素单元232和蓝色像素单元233，而红色激发光的波长较绿色激发光长，因此，即使红色激发光出射角度较大，照射到绿色像素单元232，红色激发光也无法激发绿色量子点材料发光，而红色激发光即使照射到蓝色像素单元233，若蓝色像素单元是透明的，所得到的出射光同样也是红色激发光，若蓝色像素单元中设置有蓝色滤色片，则出射到蓝色像素单元的红色激发光会被吸收。所以，也不会被串扰。
由此可见，由于颜色转换层中设置了量子点，需要进行封装，致使颜色转换层和液晶层之间必然存在至少一层封装基板，这层封装基板的设置使得颜色转换层和液晶层之间的间距增加，致使串扰的出现概率大大增加，本公开所述的液晶显示装置，即使背光光源的出射角度较大，照射到目标像素单元相邻的像素单元时，每种颜色也不会遭受串扰问题，从而使得液晶显示装置所显示的图像颜色更正，进而能够提高用户的使用体验。
此外，在上述描述的基础上，若蓝色像素单元是透明的，则蓝色像素单元233还可以透射红色激发光，即，红色激发光可以通过红色像素单元231和蓝色像素单元233出射，得到红色激发光，从而能够提高红色激发光的出光效率。
由于绿色量子点材料受到蓝色激发光激发而发光，所产生的光发生散射，一部分光向屏幕方向散射，此部分光可以被直接利用，而另一部分光向液晶层22方向散射，无法被利用，从而降低了绿色激发光的出光效率。有鉴于此，在上述结构的基础上，颜色转换层23中绿色像素单元232朝向液晶层22的一侧设置有是二向色性层，只对绿色激发光波段具有反射特性，对于其他波段的光具有高透过性。因而，蓝色激发光可以直接透过，而蓝色激发光激发绿色量子点材料而发光，在向液晶层22方向散射时，被反射到屏幕方向，重新被利用，从而能够提高绿色激发光的出光效率。
图3为本公开一些实施例提供的直下式液晶显示装置的结构示意图。直下式液晶显示装置中，光源机构21与所述液晶层22的入光面相对设置，并且，液晶层22与光源机构21之间设置有光学膜片组合24和扩散板25，其中，光学膜片组合24靠近液晶层22设置，扩散板25靠近光源机构21设置。需要指出的是，图3所示的直下式液晶显示装置中，光源机构21和颜色转换层23的具体结构如图2所示，详细描述参见图2所示的实施例，本公开一些实施例不在赘述。
在一些实施例中，扩散板25用于匀化光源机构21的激发光，光学膜片组合24用于提高匀化后的激发光的亮度。扩散板25和光学膜片组合24的具体结构及作用，是本领域技术人员所熟知的技术，本公开一些实施例此处不再赘述。
此外，本公开一些实施例还提供了一种侧入式液晶显示装置，参见图4，图4为本公开一些实施例提供的侧入式液晶显示装置的结构示意图，在一些实施例中，液晶层22的入光面顺次设置光学膜片组合24、导光板26和反射片27，其中，光源机构21从导光板26的一侧向导光板26出射激发光。同样的，该实施例中，光源机构21和颜色转换层23的具体结构如图2所示，详细描述参见图2所示的实施例，本公开一些实施例不再赘述。
一些实施例中，导光板26用于引导光源机构21的激发光均匀分布，反射片27用于将导光板26出射的光反射到导光板26的方向。导光板26和反射片27的具体结构及作用，是本领域技术人员所熟知的技术，本公开一些实施例此处不再赘述。
由此可见，本公开一些实施例的液晶显示装置，通过采用“三色四像素”的颜色转换层，并配合两个颜色的激发光，即使背光光源的出射角度较大，照射到目标像素单元相邻的像素单元时，也不会产生目标颜色之外的颜色，从而使得每种颜色均不会被串扰，使得液晶显示装置所显示的图像颜色更正，进而能够提高用户的使用体验。
结合上述液晶显示装置的结构，本公开一些实施例还提供了一种显示方法，该方法可以通过程序控制液晶显示装置来实现，而程序可以通过芯片或者单片机等承载。本公开一些实施例此处不再赘述。
该方法具体包括，当蓝色激发光光源211开启时，红色激发光光源212关闭；当红色激发光光源212开启时，蓝色激发光光源211关闭。
当蓝色激发光光源211开启时，液晶层22上与绿色像素单元232对应的间隔区间的开关打开，液晶层22上与蓝色像素单元233对应的间隔区间的开关关闭；或者，液晶层22上与绿色像素单元232对应的开关关闭，液晶层22上与蓝色像素单元233对应的间隔区间的开关打开。当红色激发光光源212开启时，液晶层22上与红色像素单元231对应的间隔区间的开关打开。
当然，在上述实施例的基础上，当红色激发光光源212开启时，液晶层22上与蓝色像素单元233对应的开关也可以打开。参见图5，在本公开的可选实施例中，可以预先设置显示周期，所述预设显示周期，是顺次且完整的显示三种颜色的光的时间段。在一个显示周期内，触发蓝色激发光光源211在显示周期的前2/3的时间段内发射蓝色激发光，并控制液晶层22上与绿色像素单元232对应的开关在2/3的时间段中任一个1/3的时间段打 开，控制液晶层22上与蓝色像素单元233对应的开关在2/3的时间段中另一个1/3的时间段打开。触发红色激发光光源212在预设显示周期的后1/3的时间段内发射红色激发光，并控制液晶层22上与红色像素单元231对应的开关在该后1/3的时间段中打开。其中，液晶层上间隔区间的开关时段和背光光源的开关时段有对应的时序关系。
当然，在上述显示方法的基础上，还可以控制液晶层22上与蓝色像素单元233对应的开关在后1/3的时间段中打开。
此外，在图5所示的实施例的基础上，蓝色激发光光源211打开的时间段内，也可以根据需要，控制液晶层22上与蓝色像素单元233和绿色像素单元232对应的开关同时打开，从而激发蓝色像素单元233和绿色像素单元232同时发光。
需要说明的是，上述对预设周期的描述的实施例仅仅是本公开的一种可选实施例，对本公开一些实施例不构成限制，本公开还可以在前2/3的时间段交换绿色像素单元232和蓝色像素单元233的显示顺序，或者，蓝色激发光光源211和红色激发光光源212在其他时间段显示，其他实施例的具体实施方式，本公开一些实施例此处不再详述。
在一些实施例中，红色激发光光源和蓝色激发光光源还可以同时点亮，并根据待显示图像控制液晶层中液晶分子的偏转。
综上所述，为解决现有液晶显示装置颜色串扰的问题，本公开一些实施例的液晶显示装置同样设置有光源机构，以及相互平行设置的液晶层和颜色转换层三部分，然而。本公开中，光源机构提供蓝色激发光和红色激发光两种激发光，并且，颜色转换层的每个绿色像素单元两端均是红色像素单元；每个蓝色像素单元的两端相邻的均是红色像素单元；每个红色像素单元一端相邻的是蓝色像素单元，另一端相邻的是绿色像素单元。其中，绿色像素单元设置有绿色量子点材料，用于接收蓝色激发光的激发而发光，而红色像素单元设置有滤光片，用于滤除红色激发光之外的光。由此可见，本公开在执行时，通过蓝色激发光照射绿色量子点材料发发光时，由于绿色像素单元两端相邻的红色区域能够滤除红色激发光之外的光，因此，即使蓝色激发光照射到红色像素单元，红色像素单元也不会发光，从而不会产生串扰。同样的，蓝色激发光从蓝色像素单元出射，得到蓝色激发光，而每一个蓝色像素单元的两端同样是红色像素区域，因此，对蓝色激发光出射光也不会产生颜色串扰。当红色激发光照射红色像素单元时，由于每个红色像素单元两端分别是绿色像素单元和蓝色像素单元，而红色激发光的波长较绿色激发光长，因此，红色激发光无法激发绿色量子点材料发光，此外，红色激发光即使照射到蓝色像素单元，若蓝色像素单元是透明的，所得到的出射光同样也是红色激发光，若蓝色像素单元中设置有蓝色滤色片，则出射 到蓝色像素单元的红色激发光会被吸收，所以，红色也不会被其他颜色串扰。由此可见，本公开与相关技术相比，即使背光光源的出射角度较大，照射到目标像素单元相邻的像素单元时，也不会产生目标颜色之外的颜色，从而使得每种颜色均不会被串扰，使得液晶显示装置所显示的图像颜色更正，进而能够提高用户的使用体验。
本公开还提供了一种量子点液晶面板，包括：液晶层和设置在液晶层出光侧的量子点转换层，所述液晶层设置有多个间隔区间，所述多个间隔区间中的每个与所述量子点转换层的每个像素单元相对应并且外部设置有开关，所述量子点转换层中绿色像素单元两端相邻是红色像素单元；蓝色像素单元的两端相邻是所述红色像素单元；所述红色像素单元一端相邻的是所述蓝色像素单元，另一端相邻的是所述绿色像素单元。
本公开的一些实施例中量子点液晶面板中的绿色像素单元设置有绿色量子点材料，以受激发产生绿色荧光；红色像素单元设置有红色滤光片，以透射背光中的红色光线并吸收其他颜色的光线；所述蓝色像素单元设置有透明材料，可透过背光中的所有光线。
本公开的一些实施例中量子点液晶面板中的绿色像素单元设置有绿色量子点材料，以受激发产生绿色荧光；红色像素单元设置有红色滤光片，以透射背光中的红色光线并吸收其他颜色的光线；蓝色像素单元设置有蓝色滤光片，以透射背光中的蓝色光线并吸收其他颜色的光线。
最后应说明的是：以上各实施例仅用以说明本公开的技术方案，而非对其限制；尽管参照前述各实施例对本公开进行了详细的说明，本领域技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本公开各实施例技术方案的范围。

Claims (10)

  1. 一种液晶显示装置，包括：光源机构，以及液晶层和颜色转换层，所述液晶层设置有多个间隔区间，所述多个间隔区间中的每个与所述颜色转换层的每个像素单元相对应并且外部设置有开关，其特征在于，
    所述颜色转换层中绿色像素单元的两端相邻的是红色像素单元；蓝色像素单元的两端相邻的是所述红色像素单元；所述红色像素单元的一端相邻的是所述蓝色像素单元，另一端相邻的是所述绿色像素单元。
  2. 如权利要求1所述的液晶显示装置，其特征在于，
    所述光源机构包括蓝色激发光光源和红色激发光光源，其中，所述蓝色激发光光源用于提供蓝色激发光，所述红色激发光光源用于提供红色激发光；
    其中，所述绿色像素单元设置有绿色量子点材料，用于接收所述蓝色激发光光源的蓝色激发光并发光；所述红色像素单元设置有滤光片，所述滤光片用于透射红色激发光并滤除红色激发光之外的光；所述蓝色像素单元设置有透明材料可以透过所有光线。
  3. 如权利要求1所述的液晶显示装置，其特征在于，
    所述光源机构包括蓝色激发光光源和红色激发光光源，其中，所述蓝色激发光光源用于提供蓝色激发光，所述红色激发光光源用于提供红色激发光；
    其中，所述绿色像素单元设置有绿色量子点材料，用于接收所述蓝色激发光光源的蓝色激发光并发光；所述红色像素单元设置有滤光片，所述滤光片用于透射红色激发光并滤除红色激发光之外的光；所述蓝色像素单元设置有蓝色滤光片，所述蓝色滤光片用于透过蓝色激发光并滤除蓝色激发光之外的光。
  4. 如权利要求1所述的液晶显示装置，其特征在于，
    所述颜色转换层中绿色像素单元朝向所述液晶层的一侧设置有二向色层，所述二向色层用于反射绿色激发光并透射绿色激发光之外的光。
  5. 如权利要求1所述的液晶显示装置，其特征在于，
    所述光源机构与所述液晶层的入光面相对设置；
    所述液晶层与所述光源机构之间设置有光学膜片组合和扩散板，其中，所述光学膜片组合靠近所述液晶层设置；所述扩散板靠近所述光源机构设置。
  6. 如权利要求1所述的液晶显示装置，其特征在于，
    所述液晶层的入光面顺次设置光学膜片组合、导光板和反射片，所述光源机构从所述导光板的一侧，向所述导光板出射激发光；
    其中，所述导光板用于引导所述光源机构的激发光均匀分布；所述反射片用于将所述导光板出射的光反射到所述导光板的方向。
  7. 如权利要求2所述的液晶显示装置，其特征在于，
    当所述蓝色激发光光源开启时，所述红色激发光光源关闭，所述液晶层上与所述绿色像素单元对应的间隔区间的开关打开；所述液晶层上与所述蓝色像素单元对应的间隔区间的开关关闭；或者，
    当所述蓝色激发光光源开启时，所述红色激发光光源关闭，所述液晶层上与所述绿色像素单元对应的间隔区间的开关关闭，所述液晶层上与所述蓝色像素单元对应的间隔区间的开关打开；或者，
    当所述红色激发光光源开启时，所述蓝色激发光光源关闭，所述液晶层上与所述红色像素单元对应的间隔区间的开关打开。
  8. 一种量子点液晶面板，包括：液晶层和设置在液晶层出光侧的量子点转换层，所述液晶层设置有多个间隔区间，所述多个间隔区间中的每个与所述量子点转换层的每个像素单元相对应并且外部设置有开关，其特征在于，
    所述量子点转换层中绿色像素单元的两端相邻的是红色像素单元；蓝色像素单元的两端相邻的是所述红色像素单元；所述红色像素单元的一端相邻的是所述蓝色像素单元，另一端相邻的是所述绿色像素单元。
  9. 如权利要求8所述的量子点液晶面板，其特征在于：
    所述绿色像素单元设置有绿色量子点材料；所述红色像素单元设置有红色滤光片；所述蓝色像素单元设置有透明材料。
  10. 如权利要求8所述的量子点液晶面板，其特征在于：
    所述绿色像素单元设置有绿色量子点材料；所述红色像素单元设置有红色滤光片；所述蓝色像素单元设置有蓝色滤光片。
PCT/CN2018/072994 2017-07-24 2018-01-17 量子点液晶面板及液晶显示装置 Ceased WO2019019570A1 (zh)

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CN108303823A (zh) * 2018-01-25 2018-07-20 惠州市华星光电技术有限公司 背光模组及显示装置
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