WO2017041345A1 - 液晶显示器 - Google Patents

液晶显示器 Download PDF

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Publication number
WO2017041345A1
WO2017041345A1 PCT/CN2015/091723 CN2015091723W WO2017041345A1 WO 2017041345 A1 WO2017041345 A1 WO 2017041345A1 CN 2015091723 W CN2015091723 W CN 2015091723W WO 2017041345 A1 WO2017041345 A1 WO 2017041345A1
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Prior art keywords
light
liquid crystal
blue
substrate
crystal display
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PCT/CN2015/091723
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English (en)
French (fr)
Inventor
梁宇恒
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深圳市华星光电技术有限公司
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Priority to US14/787,769 priority Critical patent/US9740041B2/en
Publication of WO2017041345A1 publication Critical patent/WO2017041345A1/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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • 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
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    • 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
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    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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    • 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
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    • 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
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    • 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
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    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
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    • 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
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    • 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
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Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a liquid crystal display.
  • Liquid crystal display has many advantages such as thin body, power saving, and no radiation, and has been widely used. Such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or laptop screen.
  • a liquid crystal display device includes a housing, a liquid crystal display panel disposed in the housing, and a backlight module disposed in the housing.
  • the structure of the liquid crystal display panel is mainly composed of a Thin Film Transistor Array Substrate (TFT Array Substrate), a color filter substrate (Color Filter, CF), and a liquid crystal layer disposed between the two substrates ( Liquid Crystal Layer) is constructed by controlling the rotation of the liquid crystal molecules of the liquid crystal layer by applying a driving voltage on the two glass substrates, and refracting the light of the backlight module to produce a picture.
  • TFT Array Substrate Thin Film Transistor Array Substrate
  • Color Filter Color Filter
  • CF color filter substrate
  • Liquid Crystal Layer Liquid Crystal Layer
  • Quantum Dots (QDs) materials refer to semiconductor grains with a particle size of 1 to 100 nm. Since the quantum dot material has a particle size smaller than or close to the exciton Bohr radius of the corresponding bulk material, a quantum confinement effect is produced.
  • the energy level structure changes from quasi-continuous of bulk material to discrete structure of quantum dot material, resulting in quantum dots exhibiting special stimulated radiation luminescence properties. As the size of the quantum dot decreases, the band gap of the energy level increases, and the energy required for the corresponding quantum dot to be stimulated and the energy released by the quantum dot to return to the ground state are correspondingly increased, which is manifested by the excitation of the quantum dot.
  • the luminescence spectrum is half-height and wide and can cover the entire visible light region.
  • the size of the CdSe quantum dot is reduced from 6.6 nm to 2.0 nm, and its emission wavelength is "blue shifted" from the red light region 635 nm to 460 nm in the blue light region.
  • Quantum dot materials have the advantages of controllable wavelength of light emission and half width and width.
  • the existing application technology of quantum dot materials uses color light-emitting layers made of quantum dots with different light-emitting wavelengths instead of color filters in current liquid crystal display devices.
  • the film can solve the defect of the blue LED plus the yellow phosphor on the spectral distribution and improve the color gamut of the display; however, since the color luminescent layer is generally disposed at a position close to the outside of the liquid crystal display, the external natural light excites the quantum dot. Therefore, the contrast of the display is lowered in a bright environment, and there is a possibility of color shift.
  • the color illuminating layer replaces the traditional color filter, and at the same time, a single light guiding film is disposed on the light emitting side of the liquid crystal display panel, so that external light cannot enter the liquid crystal display panel to excite the quantum dot material to emit light, thereby avoiding the quantum dot being excited by external light. Problems such as reduced display contrast and color shift.
  • the present invention provides a liquid crystal display including a liquid crystal display panel and a backlight;
  • the liquid crystal display panel includes an upper substrate and a lower substrate disposed opposite to each other, and a liquid crystal disposed between the upper substrate and the lower substrate Floor;
  • the upper substrate includes a first substrate, a color light-emitting layer disposed above the first substrate, a single light-guide film disposed above the color light-emitting layer, an upper polarizer disposed under the first substrate, and a first alignment film disposed under the upper polarizer;
  • the lower substrate includes a second substrate, a lower polarizer disposed under the second substrate, a thin film transistor layer disposed above the second substrate, and a second alignment film disposed above the thin film transistor layer;
  • the color light-emitting layer includes a plurality of red sub-pixel regions, a plurality of green sub-pixel regions, and a plurality of blue sub-pixel regions, wherein the red sub-pixel regions include red light quantum dots having an emission wavelength of 610-650 nm, and the green
  • the sub-pixel region includes a green light quantum dot having an emission wavelength of 510-540 nm, the blue sub-pixel region comprising a blue light quantum dot having an emission wavelength of 410-440 nm or the blue sub-pixel region being a transparent material, the color emission layer
  • the red, green, and blue sub-pixel regions respectively emit red, green, and blue light under the illumination of the light emitted by the backlight;
  • the light emitted by the color illuminating layer can propagate outward through the single light guiding film, but the external light is blocked by the single light guiding film, so that it cannot propagate to the color luminescent layer to excite the quantum dot illuminating.
  • the backlight is a blue light source or an ultraviolet light source.
  • the blue sub-pixel region includes a blue light quantum dot having an emission wavelength of 410-440 nm, the backlight is an ultraviolet light source, and the red, green, and blue quantum dots in the red, green, and blue sub-pixel regions respectively Red, green, and blue light are emitted under the excitation of ultraviolet rays.
  • the blue sub-pixel region is a transparent material
  • the backlight is a blue light source
  • the red light quantum dots in the red sub-pixel region and the green light quantum dots in the green sub-pixel region respectively emit red under the excitation of blue light.
  • Light and green light the blue light passing through the transparent material in the blue sub-pixel region, causing the blue sub-pixel region to emit blue light.
  • the material of the red light quantum dot, the green light quantum dot, and the blue light quantum dot is one or more of a group II-VI quantum dot material, a group III-V quantum dot material, and a group I-III-VI quantum dot material.
  • the material of the red light quantum dot, the green light quantum dot, and the blue light quantum dot is one or more of CdSe, CdS, CdTe, ZnS, ZnSe, CuInS, and ZnCuInS.
  • the polarizing direction of the upper polarizer and the polarizing direction of the lower polarizer are perpendicular or mutually flat Row.
  • the liquid crystal display further includes a black matrix disposed in the upper substrate or the lower substrate or disposed in both the upper substrate and the lower substrate.
  • the first substrate and the second substrate are both transparent substrates.
  • the single light guiding film has a light guiding surface and a light emitting surface, and the light guiding surface is provided with a plurality of ribs arranged side by side, and the top of the rib is provided with a sharp corner reflecting portion, and the pointed corner reflecting portion
  • the two reflecting surfaces are in contact with the two inclined surfaces of the ribs, and the light emitting surface is a smooth surface; the light guiding surface is disposed adjacent to the color light emitting layer.
  • the present invention also provides a liquid crystal display comprising a liquid crystal display panel and a backlight;
  • the liquid crystal display panel includes an upper substrate and a lower substrate disposed opposite to each other, and a liquid crystal layer disposed between the upper substrate and the lower substrate;
  • the upper substrate includes a first substrate, a color light-emitting layer disposed above the first substrate, a single light-guide film disposed above the color light-emitting layer, an upper polarizer disposed under the first substrate, and a first alignment film disposed under the upper polarizer;
  • the lower substrate includes a second substrate, a lower polarizer disposed under the second substrate, a thin film transistor layer disposed above the second substrate, and a second alignment film disposed above the thin film transistor layer;
  • the color light-emitting layer includes a plurality of red sub-pixel regions, a plurality of green sub-pixel regions, and a plurality of blue sub-pixel regions, wherein the red sub-pixel regions include red light quantum dots having an emission wavelength of 610-650 nm, and the green
  • the sub-pixel region includes a green light quantum dot having an emission wavelength of 510-540 nm, the blue sub-pixel region comprising a blue light quantum dot having an emission wavelength of 410-440 nm or the blue sub-pixel region being a transparent material, the color emission layer
  • the red, green, and blue sub-pixel regions respectively emit red, green, and blue light under the illumination of the light emitted by the backlight;
  • the light emitted by the color illuminating layer can propagate outward through the single light guiding film, but the external light is blocked by the single light guiding film, so that it cannot propagate to the color luminescent layer to excite quantum dots to emit light;
  • the backlight source is a blue light source or a white light source or an ultraviolet light source
  • polarizing direction of the upper polarizer and the polarizing direction of the lower polarizer are perpendicular to each other or parallel to each other;
  • the liquid crystal display further includes a black matrix disposed in the upper substrate or the lower substrate or disposed in both the upper substrate and the lower substrate;
  • first substrate and the second substrate are both transparent substrates
  • the single light guiding film has a light guiding surface and a light emitting surface, and the light guiding surface is provided with a plurality of ribs arranged side by side, and the top of the rib is provided with a sharp corner reflecting portion, and the pointed corner reflection Ministry
  • the two reflecting surfaces are in contact with the two inclined surfaces of the ribs, and the light emitting surface is a smooth surface; the light guiding surface is disposed adjacent to the color light emitting layer.
  • the invention provides a liquid crystal display, which improves the color gamut performance of the liquid crystal display by setting a color light-emitting layer mainly made of a quantum dot material in the liquid crystal display panel, and simultaneously emits light through the liquid crystal display panel.
  • the single-guide light film is disposed on the side such that the light emitted by the color light-emitting layer can propagate through the single-guide light film, but the external light is blocked by the single light-guide film and cannot be propagated to the color light-emitting layer to excite quantum dots to emit light. Therefore, the problem that the traditional quantum dot display is easily excited by external light to cause the contrast to decrease or even the color shift is avoided, and the display quality of the liquid crystal display is improved.
  • FIG. 1 is a schematic structural view of a first embodiment of a liquid crystal display according to the present invention.
  • FIG. 2 is a schematic structural view of a second embodiment of a liquid crystal display of the present invention.
  • FIG. 3 is a schematic cross-sectional view showing a single light guiding film in a liquid crystal display of the present invention.
  • the present invention provides a liquid crystal display including a liquid crystal display panel 200 and a backlight 100/100'.
  • the liquid crystal display panel 200 includes an upper substrate 2 and a lower substrate 1 disposed opposite to each other, and is disposed on The liquid crystal layer 3 between the upper substrate 2 and the lower substrate 1;
  • the upper substrate 2 includes a first substrate 24, a color light-emitting layer 22 disposed above the first substrate 24, a single light-guide film 21 disposed above the color light-emitting layer 22, and the first substrate 24; a lower polarizer 25 below, and a first alignment film 26 disposed under the upper polarizer 25;
  • the lower substrate 1 includes a second substrate 12, a lower polarizer 11 disposed under the second substrate 12, a thin film transistor layer 13 disposed above the second substrate 12, and a thin film transistor layer 13 disposed on the lower substrate Upper second alignment film 14;
  • the color light-emitting layer 22 includes a plurality of red sub-pixel regions 221, a plurality of green sub-pixel regions 222, and a plurality of blue sub-pixel regions 223/223', and the red sub-pixel region 221 includes an emission wavelength of 610-650 nm.
  • Red light quantum dot the green sub-pixel region 222 containing a luminescent wave a green light quantum dot having a length of 510-540 nm, the blue sub-pixel region 223/223' comprising a blue light quantum dot having an emission wavelength of 410-440 nm or the blue sub-pixel region 223/223' being a transparent material,
  • the red, green, and blue sub-pixel regions 221, 222, and 223/223' of the color light-emitting layer 22 respectively emit red, green, and blue light under the illumination of the light emitted by the backlight 100/100';
  • the light emitted by the color illuminating layer 22 can propagate outward through the single light guiding film 21, but the external light is blocked and reflected by the single light guiding film 21, so that it cannot propagate to the color luminescent layer 22 to excite quantum dots to emit light.
  • the backlight 100/100' is a blue light source or an ultraviolet light source.
  • the blue sub-pixel region 223 includes a blue quantum dot having an emission wavelength of 410-440 nm, and the backlight 100 is ultraviolet.
  • the red, green, and blue quantum dots in the red, green, and blue sub-pixel regions 221, 222, and 223 emit red, green, and blue light respectively under the excitation of ultraviolet rays.
  • the blue sub-pixel region 223' is a transparent material
  • the backlight 100' is a blue light source
  • the red sub- The red light quantum dots in the pixel region 221 and the green light quantum dots in the green sub-pixel region 222 respectively emit red light and green light under excitation of blue light, and the blue light passes through the blue sub-pixel region 223 ′.
  • the transparent material causes the blue sub-pixel region 223' to emit blue light.
  • the transparent material is a transparent photoresist.
  • the material of the red light quantum dot, the green light quantum dot, and the blue light quantum dot is one of a II-VI quantum dot material, a III-V quantum dot material, and a I-III-VI quantum dot material or A variety.
  • the material of the red light quantum dot, the green light quantum dot, and the blue light quantum dot is one or more of CdSe, CdS, CdTe, ZnS, ZnSe, CuInS, and ZnCuInS.
  • the polarizing direction of the upper polarizer 25 and the polarizing direction of the lower polarizer 11 are perpendicular to each other or parallel to each other; when the polarizing direction of the upper polarizer 25 and the polarizing direction of the lower polarizer 11 are perpendicular to each other, The liquid crystal display is in a normally dark mode; when the polarizing direction of the upper polarizer 25 and the polarizing direction of the lower polarizer 11 are parallel to each other, the liquid crystal display is in a normally bright mode.
  • the liquid crystal display further includes a black matrix 23 disposed in the upper substrate 2 or the lower substrate 1 or disposed in both the upper substrate 2 and the lower substrate 1.
  • the first substrate 24 and the second substrate 12 are both transparent substrates.
  • the first substrate 24 and the second substrate 12 are both glass substrates.
  • the single light guiding film 21 has a light guiding surface 211 and a light emitting surface 212.
  • the light guiding surface 211 is provided with a plurality of ribs 210 arranged side by side, and the top of the rib 210 is provided with a corner reflecting portion 2103, two reflecting surfaces of the pointed corner reflecting portion 2103 and the rib 210 The two inclined façades are attached, and the illuminating surface 212 is a smooth surface.
  • the light guiding surface 211 is disposed adjacent to the color light emitting layer 22 .
  • the pointed corner reflection portion 2103 is a metal reflective layer, and the metal material may be aluminum, silver or titanium.
  • the working principle of the single-guide light film 21 is that the light is irradiated onto the light guiding surface 211 by the light-diffusing medium, and is reflected and refracted by the light guiding surface 211 into the single-light guiding film 21, and the light-emitting surface is 212 is derived, the direction is the light guiding direction of the single light guiding film 21; the light enters the single light guiding film 21 from the light emitting surface 212, is irradiated onto the light guiding surface 211, and is reflected by the light guiding surface 211 The light surface 212 is derived, and the direction is the light blocking direction of the single light guiding film 21.
  • the single light guiding film 21 is provided with a sharp corner reflecting portion 2103 on the top of the rib 210 of the light guiding surface 211 to adjust the sharp angle, so that the light in the light guiding direction of the single light guiding film 21 is reflected by the reflective layer to the other side.
  • the light in the blocking direction of the single-guide light film 21 is reflected back by the total reflection and reflection layers, realizing a single-guide light.
  • the present invention provides a liquid crystal display in which a color light-emitting layer mainly made of a quantum dot material is disposed in a liquid crystal display panel, thereby improving the color gamut performance of the liquid crystal display while passing through the light-emitting side of the liquid crystal display panel.

Abstract

一种液晶显示器，通过在液晶显示面板（200）中设置主要采用量子点材料制作的彩色发光层（22），提升了液晶显示器的色域表现，同时通过在液晶显示面板（200）的出光侧设置单向导光薄膜（21），使得所述彩色发光层（22）发出的光线可以透过所述单向导光薄膜（21）往外传播，但是外部的光线被单向导光薄膜（21）阻挡反射，不能传播到彩色发光层（22）激发量子点发光，从而避免了传统的量子点显示器容易受到外部光线激发造成其对比度下降甚至色偏的问题，提升了液晶显示器的显示品质。

Description

液晶显示器 技术领域
本发明涉及液晶显示技术领域，尤其涉及一种液晶显示器。
背景技术
液晶显示装置(LCD，Liquid Crystal Display)具有机身薄、省电、无辐射等众多优点，得到了广泛的应用。如：液晶电视、移动电话、个人数字助理(PDA)、数字相机、计算机屏幕或笔记本电脑屏幕等。通常液晶显示装置包括壳体、设于壳体内的液晶显示面板及设于壳体内的背光模组(Backlight module)。其中，液晶显示面板的结构主要是由一薄膜晶体管阵列基板(Thin Film Transistor Array Substrate，TFT Array Substrate)、一彩色滤光片基板(Color Filter，CF)、以及配置于两基板间的液晶层(Liquid Crystal Layer)所构成，其工作原理是通过在两片玻璃基板上施加驱动电压来控制液晶层的液晶分子的旋转，将背光模组的光线折射出来产生画面。
量子点(Quantum Dots，QDs)材料是指粒径在1～100nm的半导体晶粒，由于量子点材料的粒径尺寸小于或者接近相应体材料的激子波尔半径，产生量子限域效应，其能级结构从体材料的准连续变为量子点材料的离散结构，导致量子点展示出特殊的受激辐射发光的性能。随着量子点的尺寸减小，其能级带隙增加，相应的量子点受激所需要的能量以及量子点受激后回到基态放出的能量都相应的增大，表现为量子点的激发与荧光光谱的“蓝移”现象，通过控制量子点的尺寸，使其发光光谱半高宽窄并可以覆盖整个可见光区域。例如CdSe量子点的尺寸从6.6nm减小至2.0nm，其发光波长从红光区域635nm“蓝移”至蓝光区域的460nm。
量子点材料拥有发光波长可控、半高宽窄的优点，现有的一种量子点材料的应用技术采用由不同发光波长量子点制成的彩色发光层来替代目前液晶显示装置里面的彩色滤光片，可以解决蓝光LED加黄色荧光粉在光谱分布上面的缺陷，提高显示器的色域；但是，由于该彩色发光层一般设置于液晶显示器的靠近外部的位置，外部的自然光会对量子点进行激发，因此在明亮的环境下显示器的对比度下降，且有可能产生色偏的现象。
发明内容
本发明的目的在于提供一种液晶显示器，采用主要由量子点制作的彩 色发光层代替传统的彩色滤光片，同时通过在液晶显示面板的出光侧设置单向导光薄膜，使得外部光线不能进入液晶显示面板内激发量子点材料发光，避免量子点被外部光线激发导致的显示器对比度下降和色偏等问题。
为实现上述目的，本发明提供一种液晶显示器，包括液晶显示面板与背光源；所述液晶显示面板包括相对设置的上基板与下基板、及设于所述上基板与下基板之间的液晶层；
所述上基板包括第一基板、设于所述第一基板上方的彩色发光层、设于所述彩色发光层上方的单向导光薄膜、设于所述第一基板下方的上偏光片、及设于所述上偏光片下方的第一配向膜；
所述下基板包括第二基板、设于所述第二基板下方的下偏光片、设于所述第二基板上方的薄膜晶体管层、及设于所述薄膜晶体管层上方的第二配向膜；
所述彩色发光层包括数个红色子像素区域、数个绿色子像素区域、及数个蓝色子像素区域，所述红色子像素区域包含发光波长为610-650nm的红光量子点，所述绿色子像素区域包含发光波长为510-540nm的绿光量子点，所述蓝色子像素区域包含发光波长为410-440nm的蓝光量子点或者所述蓝色子像素区域为透明材料，所述彩色发光层的红、绿、蓝色子像素区域在所述背光源发出的光线的照射下分别发出红、绿、蓝光；
所述彩色发光层发出的光线可以透过所述单向导光薄膜往外传播，但是外部的光线被单向导光薄膜阻挡反射，从而不能传播到彩色发光层激发量子点发光。
所述背光源为蓝光光源或紫外线光源。
所述蓝色子像素区域包含发光波长为410-440nm的蓝光量子点，所述背光源为紫外线光源，所述红色、绿色、蓝色子像素区域中的红光、绿光、蓝光量子点分别在紫外线的激发下发出红、绿、蓝光。
所述蓝色子像素区域为透明材料，所述背光源为蓝光光源，所述红色子像素区域中的红光量子点与所述绿色子像素区域中的绿光量子点分别在蓝光的激发下发出红光与绿光，所述蓝光穿过所述蓝色子像素区域中的透明材料，使蓝色子像素区域发出蓝光。
所述红光量子点、绿光量子点、及蓝光量子点的材料为Ⅱ-Ⅵ族量子点材料、Ⅲ-Ⅴ族量子点材料、Ⅰ-Ⅲ-Ⅵ族量子点材料中的一种或多种。
所述红光量子点、绿光量子点、及蓝光量子点的材料为CdSe、CdS、CdTe、ZnS、ZnSe、CuInS、ZnCuInS中的一种或多种。
所述上偏光片的偏光方向与下偏光片的偏光方向互相垂直或互相平 行。
所述液晶显示器还包括黑色矩阵，所述黑色矩阵设置于所述上基板或下基板中、或者在上基板和下基板中均有设置。
所述第一基板与第二基板均为透明基板。
所述单向导光薄膜具有导光面与出光面，所述导光面上设有并排连续的数个凸棱，所述凸棱的顶部设置有尖角反射部，所述尖角反射部的两反射面与所述凸棱的两斜立面贴合，所述出光面为平滑表面；所述导光面靠近彩色发光层设置。
本发明还提供一种液晶显示器，包括液晶显示面板与背光源；所述液晶显示面板包括相对设置的上基板与下基板、及设于所述上基板与下基板之间的液晶层；
所述上基板包括第一基板、设于所述第一基板上方的彩色发光层、设于所述彩色发光层上方的单向导光薄膜、设于所述第一基板下方的上偏光片、及设于所述上偏光片下方的第一配向膜；
所述下基板包括第二基板、设于所述第二基板下方的下偏光片、设于所述第二基板上方的薄膜晶体管层、及设于所述薄膜晶体管层上方的第二配向膜；
所述彩色发光层包括数个红色子像素区域、数个绿色子像素区域、及数个蓝色子像素区域，所述红色子像素区域包含发光波长为610-650nm的红光量子点，所述绿色子像素区域包含发光波长为510-540nm的绿光量子点，所述蓝色子像素区域包含发光波长为410-440nm的蓝光量子点或者所述蓝色子像素区域为透明材料，所述彩色发光层的红、绿、蓝色子像素区域在所述背光源发出的光线的照射下分别发出红、绿、蓝光；
所述彩色发光层发出的光线可以透过所述单向导光薄膜往外传播，但是外部的光线被单向导光薄膜阻挡反射，从而不能传播到彩色发光层激发量子点发光；
其中，所述背光源为蓝光光源或白光光源或紫外线光源；
其中，所述上偏光片的偏光方向与下偏光片的偏光方向互相垂直或互相平行；
其中，所述液晶显示器还包括黑色矩阵，所述黑色矩阵设置于所述上基板或下基板中、或者在上基板和下基板中均有设置；
其中，所述第一基板与第二基板均为透明基板；
其中，所述单向导光薄膜具有导光面与出光面，所述导光面上设有并排连续的数个凸棱，所述凸棱的顶部设置有尖角反射部，所述尖角反射部 的两反射面与所述凸棱的两斜立面贴合，所述出光面为平滑表面；所述导光面靠近彩色发光层设置。
本发明的有益效果：本发明提供的一种液晶显示器，通过在液晶显示面板中设置主要采用量子点材料制作的彩色发光层，提升了液晶显示器的色域表现，同时通过在液晶显示面板的出光侧设置单向导光薄膜，使得所述彩色发光层发出的光线可以透过所述单向导光薄膜往外传播，但是外部的光线被单向导光薄膜阻挡反射，不能传播到彩色发光层激发量子点发光，从而避免了传统的量子点显示器容易受到外部光线激发造成其对比度下降甚至色偏的问题，提升了液晶显示器的显示品质。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为本发明的液晶显示器第一实施例的结构示意图；
图2为本发明的液晶显示器第二实施例的结构示意图；
图3为本发明的液晶显示器中的单向导光薄膜的剖面结构示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图1-2，本发明提供一种液晶显示器，其包括液晶显示面板200与背光源100/100’；所述液晶显示面板200包括相对设置的上基板2与下基板1、及设于所述上基板2与下基板1之间的液晶层3；
所述上基板2包括第一基板24、设于所述第一基板24上方的彩色发光层22、设于所述彩色发光层22上方的单向导光薄膜21、设于所述第一基板24下方的上偏光片25、及设于所述上偏光片25下方的第一配向膜26；
所述下基板1包括第二基板12、设于所述第二基板12下方的下偏光片11、设于所述第二基板12上方的薄膜晶体管层13、及设于所述薄膜晶体管层13上方的第二配向膜14；
所述彩色发光层22包括数个红色子像素区域221、数个绿色子像素区域222、及数个蓝色子像素区域223/223’，所述红色子像素区域221包含发光波长为610-650nm的红光量子点，所述绿色子像素区域222包含发光波 长为510-540nm的绿光量子点，所述蓝色子像素区域223/223’包含发光波长为410-440nm的蓝光量子点或者所述蓝色子像素区域223/223’为透明材料，所述彩色发光层22的红、绿、蓝色子像素区域221、222、223/223’在所述背光源100/100’发出的光线的照射下分别发出红、绿、蓝光；
所述彩色发光层22发出的光线可以透过所述单向导光薄膜21往外传播，但是外部的光线被单向导光薄膜21阻挡反射，从而不能传播到彩色发光层22激发量子点发光。
具体的，所述背光源100/100’为蓝光光源或紫外线光源。
如图1所示，为本发明液晶显示器的第一实施例，在该实施例中，所述蓝色子像素区域223包含发光波长为410-440nm的蓝光量子点，所述背光源100为紫外线光源，所述红色、绿色、蓝色子像素区域221、222、223中的红光、绿光、蓝光量子点分别在紫外线的激发下发出红、绿、蓝光。
如图2所示，为本发明液晶显示器的第二实施例，在该实施例中，所述蓝色子像素区域223’为透明材料，所述背光源100’为蓝光光源，所述红色子像素区域221中的红光量子点与所述绿色子像素区域222中的绿光量子点分别在蓝光的激发下发出红光与绿光，所述蓝光穿过所述蓝色子像素区域223’中的透明材料，使蓝色子像素区域223’发出蓝光。
优选的，所述透明材料为透明光阻。
具体的，所述红光量子点、绿光量子点、及蓝光量子点的材料为Ⅱ-Ⅵ族量子点材料、Ⅲ-Ⅴ族量子点材料、Ⅰ-Ⅲ-Ⅵ族量子点材料中的一种或多种。
优选的，所述红光量子点、绿光量子点、及蓝光量子点的材料为CdSe、CdS、CdTe、ZnS、ZnSe、CuInS、ZnCuInS中的一种或多种。
具体的，所述上偏光片25的偏光方向与下偏光片11的偏光方向互相垂直或互相平行；当所述上偏光片25的偏光方向与下偏光片11的偏光方向互相垂直时，所述液晶显示器为常暗模式；当所述上偏光片25的偏光方向与下偏光片11的偏光方向互相平行时，所述液晶显示器为常亮模式。
具体的，所述液晶显示器还包括黑色矩阵23，所述黑色矩阵23设置于所述上基板2或下基板1中、或者在上基板2和下基板1中均有设置。
具体的，所述第一基板24与第二基板12均为透明基板。优选的，所述第一基板24与第二基板12均为玻璃基板。
如图3所示，所述单向导光薄膜21具有导光面211与出光面212，所述导光面211上设有并排连续的数个凸棱210，所述凸棱210的顶部设置有尖角反射部2103，所述尖角反射部2103的两反射面与所述凸棱210的 两斜立面贴合，所述出光面212为平滑表面。具体的，所述导光面211靠近彩色发光层22设置。
具体的，所述尖角反射部2103为金属反射层，该金属材料可以是铝、银或钛。
具体的，所述单向导光薄膜21的工作原理为：光线由光疏介质照射到所述导光面211上，经导光面211反射和折射进入单向导光薄膜21，由所述出光面212导出，该方向为所述单向导光薄膜21的导光方向；光线由所述出光面212进入单向导光薄膜21，照射到所述导光面211上，经导光面211反射由所述出光面212导出，该方向为所述单向导光薄膜21的阻光方向。所述单向导光薄膜21通过在导光面211的凸棱210顶部设置尖角反射部2103，调整尖角角度，使单向导光薄膜21导光方向的光经过反射层反射进入另一侧，单向导光薄膜21阻光方向的光由于全反射和反射层被反射回来，实现了单向导光。
综上所述，本发明提供的一种液晶显示器，通过在液晶显示面板中设置主要采用量子点材料制作的彩色发光层，提升了液晶显示器的色域表现，同时通过在液晶显示面板的出光侧设置单向导光薄膜，使得所述彩色发光层发出的光线可以透过所述单向导光薄膜往外传播，但是外部的光线被单向导光薄膜阻挡反射，不能传播到彩色发光层激发量子点发光，从而避免了传统的量子点显示器容易受到外部光线激发造成其对比度下降甚至色偏的问题，提升了液晶显示器的显示品质。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (15)

  1. 一种液晶显示器，包括液晶显示面板与背光源；所述液晶显示面板包括相对设置的上基板与下基板、及设于所述上基板与下基板之间的液晶层；
    所述上基板包括第一基板、设于所述第一基板上方的彩色发光层、设于所述彩色发光层上方的单向导光薄膜、设于所述第一基板下方的上偏光片、及设于所述上偏光片下方的第一配向膜；
    所述下基板包括第二基板、设于所述第二基板下方的下偏光片、设于所述第二基板上方的薄膜晶体管层、及设于所述薄膜晶体管层上方的第二配向膜；
    所述彩色发光层包括数个红色子像素区域、数个绿色子像素区域、及数个蓝色子像素区域，所述红色子像素区域包含发光波长为610-650nm的红光量子点，所述绿色子像素区域包含发光波长为510-540nm的绿光量子点，所述蓝色子像素区域包含发光波长为410-440nm的蓝光量子点或者所述蓝色子像素区域为透明材料，所述彩色发光层的红、绿、蓝色子像素区域在所述背光源发出的光线的照射下分别发出红、绿、蓝光；
    所述彩色发光层发出的光线可以透过所述单向导光薄膜往外传播，但是外部的光线被单向导光薄膜阻挡反射，从而不能传播到彩色发光层激发量子点发光。
  2. 如权利要求1所述的液晶显示器，其中，所述背光源为蓝光光源或白光光源或紫外线光源。
  3. 如权利要求1所述的液晶显示器，其中，所述蓝色子像素区域包含发光波长为510-540nm的蓝光量子点，所述背光源为紫外线光源，所述红色、绿色、蓝色子像素区域中的红光、绿光、蓝光量子点分别在紫外线的激发下发出红、绿、蓝光。
  4. 如权利要求1所述的液晶显示器，其中，所述蓝色子像素区域为透明材料，所述背光源为蓝光光源，所述红色子像素区域中的红光量子点与所述绿色子像素区域中的绿光量子点分别在蓝光的激发下发出红光与绿光，所述蓝光穿过所述蓝色子像素区域中的透明材料，使蓝色子像素区域发出蓝光。
  5. 如权利要求1所述的液晶显示器，其中，所述红光量子点、绿光量子点、及蓝光量子点的材料为Ⅱ-Ⅵ族量子点材料、Ⅲ-Ⅴ族量子点材料、Ⅰ -Ⅲ-Ⅵ族量子点材料中的一种或多种。
  6. 如权利要求5所述的液晶显示器，其中，所述红光量子点、绿光量子点、及蓝光量子点的材料为CdSe、CdS、CdTe、ZnS、ZnSe、CuInS、ZnCuInS中的一种或多种。
  7. 如权利要求1所述的液晶显示器，其中，所述上偏光片的偏光方向与下偏光片的偏光方向互相垂直或互相平行。
  8. 如权利要求1所述的液晶显示器，其中，所述液晶显示器还包括黑色矩阵，所述黑色矩阵设置于所述上基板或下基板中、或者在上基板和下基板中均有设置。
  9. 如权利要求1所述的液晶显示器，其中，所述第一基板与第二基板均为透明基板。
  10. 如权利要求1所述的液晶显示器，其中，所述单向导光薄膜具有导光面与出光面，所述导光面上设有并排连续的数个凸棱，所述凸棱的顶部设置有尖角反射部，所述尖角反射部的两反射面与所述凸棱的两斜立面贴合，所述出光面为平滑表面；所述导光面靠近彩色发光层设置。
  11. 一种液晶显示器，包括液晶显示面板与背光源；所述液晶显示面板包括相对设置的上基板与下基板、及设于所述上基板与下基板之间的液晶层；
    所述上基板包括第一基板、设于所述第一基板上方的彩色发光层、设于所述彩色发光层上方的单向导光薄膜、设于所述第一基板下方的上偏光片、及设于所述上偏光片下方的第一配向膜；
    所述下基板包括第二基板、设于所述第二基板下方的下偏光片、设于所述第二基板上方的薄膜晶体管层、及设于所述薄膜晶体管层上方的第二配向膜；
    所述彩色发光层包括数个红色子像素区域、数个绿色子像素区域、及数个蓝色子像素区域，所述红色子像素区域包含发光波长为610-650nm的红光量子点，所述绿色子像素区域包含发光波长为510-540nm的绿光量子点，所述蓝色子像素区域包含发光波长为410-440nm的蓝光量子点或者所述蓝色子像素区域为透明材料，所述彩色发光层的红、绿、蓝色子像素区域在所述背光源发出的光线的照射下分别发出红、绿、蓝光；
    所述彩色发光层发出的光线可以透过所述单向导光薄膜往外传播，但是外部的光线被单向导光薄膜阻挡反射，从而不能传播到彩色发光层激发量子点发光；
    其中，所述背光源为蓝光光源或白光光源或紫外线光源；
    其中，所述上偏光片的偏光方向与下偏光片的偏光方向互相垂直或互相平行；
    其中，所述液晶显示器还包括黑色矩阵，所述黑色矩阵设置于所述上基板或下基板中、或者在上基板和下基板中均有设置；
    其中，所述第一基板与第二基板均为透明基板；
    其中，所述单向导光薄膜具有导光面与出光面，所述导光面上设有并排连续的数个凸棱，所述凸棱的顶部设置有尖角反射部，所述尖角反射部的两反射面与所述凸棱的两斜立面贴合，所述出光面为平滑表面；所述导光面靠近彩色发光层设置。
  12. 如权利要求11所述的液晶显示器，其中，所述蓝色子像素区域包含发光波长为510-540nm的蓝光量子点，所述背光源为紫外线光源，所述红色、绿色、蓝色子像素区域中的红光、绿光、蓝光量子点分别在紫外线的激发下发出红、绿、蓝光。
  13. 如权利要求11所述的液晶显示器，其中，所述蓝色子像素区域为透明材料，所述背光源为蓝光光源，所述红色子像素区域中的红光量子点与所述绿色子像素区域中的绿光量子点分别在蓝光的激发下发出红光与绿光，所述蓝光穿过所述蓝色子像素区域中的透明材料，使蓝色子像素区域发出蓝光。
  14. 如权利要求11所述的液晶显示器，其中，所述红光量子点、绿光量子点、及蓝光量子点的材料为Ⅱ-Ⅵ族量子点材料、Ⅲ-Ⅴ族量子点材料、Ⅰ-Ⅲ-Ⅵ族量子点材料中的一种或多种。
  15. 如权利要求14所述的液晶显示器，其中，所述红光量子点、绿光量子点、及蓝光量子点的材料为CdSe、CdS、CdTe、ZnS、ZnSe、CuInS、ZnCuInS中的一种或多种。
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