WO2014173137A1 - 一种彩膜基板、显示面板及显示装置 - Google Patents

一种彩膜基板、显示面板及显示装置 Download PDF

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Publication number
WO2014173137A1
WO2014173137A1 PCT/CN2013/089139 CN2013089139W WO2014173137A1 WO 2014173137 A1 WO2014173137 A1 WO 2014173137A1 CN 2013089139 W CN2013089139 W CN 2013089139W WO 2014173137 A1 WO2014173137 A1 WO 2014173137A1
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Prior art keywords
color filter
quantum dot
filter layer
color
size
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English (en)
French (fr)
Inventor
吴俊�
占红明
田超
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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Priority to US14/361,069 priority Critical patent/US9971189B2/en
Publication of WO2014173137A1 publication Critical patent/WO2014173137A1/zh
Anticipated expiration legal-status Critical
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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
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/201—Filters in the form of arrays
    • 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
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/23—Photochromic 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
    • G02F2202/00—Materials and properties
    • G02F2202/36—Micro- or nanomaterials

Definitions

  • Color film substrate display panel and display device
  • Embodiments of the present invention relate to a color film substrate, a display panel, and a display device. Background technique
  • liquid crystal display LCD
  • LCD liquid crystal display
  • the existing color film substrate includes a substrate 11 , and a color filter layer 12 and a black matrix 13 on the substrate 11 .
  • the color film substrate is used in a display device, and the backlight is generally a white backlight.
  • the backlight contains a mixture of blue light and yellow light, and the color is impure.
  • the white backlight is filtered through the red, green and blue primary colors (R ⁇ G ⁇ B) of the color filter layer 13 of the color filter substrate to obtain a monochromatic light.
  • R ⁇ G ⁇ B red, green and blue primary colors
  • Embodiments of the present invention also provide a display panel and a display device having high brightness and good display effect.
  • a color filter substrate for a display panel wherein the display panel has a plurality of pixels, each of which has a plurality of sub-pixel units of different colors, and the color filter substrate comprises: a village bottom formed in the village a plurality of black matrices on the bottom, the black matrices having a plurality of open regions corresponding to the sub-pixel units, and a color filter layer filled in each of the open regions;
  • the color filter layer is doped with quantum dots, and the color of the light generated by the quantum dots is the same as the color of the corresponding sub-pixel unit.
  • the material of the quantum dot comprises at least one of gallium hydride, indium phosphide, sulfurized, cadmium, or cadmium selenide.
  • the color filter layer has a red region, a green region, and a blue region respectively corresponding to three primary colors of red, green, and blue.
  • the color filter When the material of the quantum dot is cadmium selenide, the color filter The red region of the light layer has a size of the quantum dot of 3 nm to 3.5 nm; the green region of the color filter layer has a size of the quantum dot of 2 nm to 3 nm; the color of the color filter layer is blue The size of the quantum dots in the region is 1.5 nm to 2 nm.
  • the quantum dot is a core-shell type
  • the core material of the quantum dot is cadmium cadmium
  • the shell material is sulfurized or cadmium sulfide
  • the core material of the core-shell quantum dot It is indium phosphide, and the shell material is tin sulfide.
  • the red region of the color filter layer has a quantum dot size of 3.2 nm to 3.9 nm, and the color filter layer is green.
  • the size of the quantum dots in the region is 2.2 nm to 3.2 nm, and the size of the quantum dots in the blue region of the color filter layer is 1.7 nm to 2.2 nm.
  • the quantum dot may be a core-shell type quantum dot having a double shell.
  • the core material is cadmium selenide
  • the inner shell material is cadmium telluride
  • the shell material is sparse.
  • the red region of the color filter layer has a quantum dot size of 4.3 nm to 4.9 nm
  • the green region of the color filter layer has the quantum dot
  • the size of the color filter layer is 3.3 nm to 4.3 nm
  • the size of the quantum dot of the blue color region of the color filter layer is 2.8 nm to 3.3 nm.
  • the color filter layer further includes a color resist material, and the material of the quantum dot is water-soluble or oil-soluble depending on whether the color resist material is water-soluble or oil-soluble.
  • the mass percentage of quantum dots doped in the color filter layer is greater than 0 and less than 20%.
  • the embodiment of the present invention further provides a display panel, comprising: any one of the color film substrates mentioned in the above technical solutions.
  • An embodiment of the present invention further provides a display device, including: the above display panel.
  • the color film substrate provided by the embodiment of the present invention is used for a display panel.
  • the display panel has a plurality of pixels, each of which has a plurality of sub-pixel units of different colors
  • the color film substrate comprises: a village bottom. a plurality of black matrices formed on the bottom of the village, the black matrices having a plurality of open regions corresponding to the sub-pixel units, and a color filter layer filled in each of the open regions;
  • the color filter layer is doped with quantum dots, and the color of the light generated after the quantum dots are excited The color is the same as the corresponding sub-pixel unit.
  • Quantum Dot is usually a kind of nano-particle composed of II-V1 or III-V elements. The size is smaller or close to the exciton Boer radius (generally less than 10nm in diameter). The quantum effect. Quantum dots are generally considered to be quasi-zero-dimensional materials and are semiconductor nanostructures capable of binding conduction band electrons, valence band holes and excitons in three spatial directions.
  • the electron energy level near the metal Fermi level changes from quasi-continuous to discrete energy level, and the nano-semiconductor particles are discontinuous and the highest occupied molecular orbitals and The energy gap of the lowest unoccupied molecular orbital energy level is broadened, causing absorption and the blue shift of the fluorescence peak, a phenomenon known as the quantum size effect.
  • the quantum size effect causes a large change in the photoelectric properties of semiconductor quantum dots.
  • the quantum size effect changes the energy level structure of the semiconductor material, resulting in a The continuous band structure is transformed into a discrete level structure with molecular properties.
  • Quantum dots have large Stokes shifts. Another optical property of quantum dots different from organic dyes is the large Stokes shift, which avoids the overlap of the emission spectrum and the excitation spectrum, and is useful for detecting fluorescent optical signals.
  • the color film substrate provided by the embodiment of the present invention is applied to a display device, and the quantum dots have a narrow emission ray and high luminous efficiency due to the quantum size effect and the Stokes shift effect, and the sub-pixel unit of each color corresponds.
  • the quantum dots in the color filter layer can absorb the light of the light emitted by the backlight in the display device by more than the color energy of the sub-pixel unit, and efficiently convert the absorbed light into a single color of the sub-pixel unit color. The light is emitted and emitted, so that the color filter layer corresponding to the sub-pixel unit of the color is more pure and has higher saturation.
  • the color filter substrate provided by the embodiment of the present invention improves the purity of the color of light emitted from the color filter layer, thereby improving the display color gamut of the display device.
  • the display panel and the display device provided by the embodiments of the present invention have high brightness and good display effect due to the use of the above color film substrate.
  • FIG. 1 is a schematic structural view of a color filter substrate of the prior art
  • FIG. 2 is a schematic structural view of a color filter substrate according to an embodiment of the present invention. Detailed ways
  • the color of the color filter layer is not limited to RGB (Red Green Blue), but also RGBW (Red Green Blue White), RGBY (Red) Green Blue Yellow, red green blue yellow) or CMYK (Cyan Magenta Yellow blacK, green red yellow black) and other color combinations.
  • Embodiments of the present invention provide a color filter substrate 1 for a display panel having a plurality of pixels, each of which has a plurality of sub-pixel units of different colors, as shown in FIG. 2, the color filter substrate 1 includes: a village bottom 11 , a plurality of black matrices 12 formed on the bottom 11 of the village, the black matrix 12 having a plurality of open areas corresponding to the sub-pixel units, and color filters filled in each of the open areas Layer 13;
  • the color filter layer 13 is doped with quantum dots 131, and the color of the light generated by the quantum dots 131 is the same as the color of the corresponding sub-pixel unit.
  • the color filter layer 13 also includes a color photoresist material, and the quantum dots are doped in the color photoresist material.
  • the color resist material generally includes a colorant, a binder resin & a crosslinking agent, a solvent, a photopolymerization initiator, and the like. Colorants include acid dyes, basic dyes, nonionic dyes, etc., such as red acid
  • the dye includes an azo acid dye such as CL Reactive Red 120, a green acid dye includes an azo acid dye such as CL Direct Green 59, and a blue acid dye includes an oxime acid dye such as CL Reactive Blue 49.
  • the binder & crosslinker includes a polymeric material such as methyl methacrylate (PMMA), polyethylene glycol (PEG), and generally has a degree of polymerization of 2-10.
  • the solvent includes acrylic acid, styrene, ethanol, etc. or a monomer in a binder.
  • the photopolymerization initiator includes an acetophenone-based compound, a diazo compound, and the like, for example, benzophenone.
  • Quantum Dot usually composed of II-V1 or III-V elements, with a size less than or close to the exciton Boer radius (typically no more than 10 nm in diameter), with distinct quantum effect.
  • a quantum dot is generally considered to be a quasi-zero-dimensional material, a semiconductor nanostructure capable of binding conduction band electrons, valence band holes, and excitons in three spatial directions.
  • the electron energy level near the metal Fermi level changes from quasi-continuous to discrete energy level, and the highest occupied molecular orbital of the discontinuous nano-semiconductor particles And the energy gap of the lowest unoccupied molecular orbital energy level is widened, thereby causing the blue shift of the absorption and fluorescence peaks. This phenomenon is called the quantum size effect.
  • the quantum size effect causes a large change in the photoelectric properties of semiconductor quantum dots.
  • the quantum size effect changes the energy level structure of the semiconductor material, resulting in a The continuous band structure is transformed into a discrete level structure with molecular properties.
  • Quantum dots have large Stokes shifts. Another optical property of quantum dots different from organic dyes is the large Stokes shift, which avoids the overlap of the emission spectrum and the excitation spectrum, and is useful for detecting fluorescent optical signals.
  • the quantum dots are doped in the color filter layer, that is, doped in the color photoresist material, and the quantum dot material is oil-soluble or water-soluble according to the color photoresist material or Water soluble.
  • the quantum dot material is oil-soluble or water-soluble according to the color photoresist material or Water soluble.
  • the oil-soluble quantum dots are doped in the color filter layer, and when the inorganic dye is used in the color filter layer, the water-soluble quantum is doped in the color filter layer.
  • the color film substrate provided by the embodiment of the present invention is applied to a display device, and the quantum dots 131 have narrow emission light words and high luminous efficiency due to quantum size effect and Stokes displacement effect, each The quantum dot 131 in the color filter layer 13 corresponding to the sub-pixel unit of the color can absorb the light of the light emitted by the backlight in the display device by more than the color energy of the sub-pixel unit, and efficiently convert the absorbed portion of the light into The monochromatic light corresponding to the color of the sub-pixel unit is emitted and emitted, so that the color filter layer 13 corresponding to the sub-pixel unit of the color is pure in color and has high saturation.
  • the color filter substrate provided by the present invention improves the color purity of the color filter layer, thereby improving the display color gamut of the display device.
  • the material of the above quantum dots includes at least one of gallium arsenide, indium phosphide, sulfuric acid, cadmium sulfide, or cadmium telluride.
  • the color filter layer 13 has red regions 1, green regions G, and blue regions B corresponding to the three primary colors of red, green and blue, respectively, when the material of the quantum dots
  • the red region R of the color filter layer 13 has a quantum dot 131 having a size of 3 nm to 3.5 nm
  • the green region G of the color filter layer 13 has a quantum dot 131 having a size of 2 nm to 3 nm
  • the blue region B of the filter layer 13 has a quantum dot 131 having a size of 1.5 nm to 2 nm.
  • the size of the quantum dots located in the red region R, the green region G, and the blue region B of the color filter layer 13 is different, due to the size effect of the quantum dots and the Stokes shift effect, the red region R
  • the quantum dot 131 can absorb the light energy of the light source greater than the red light energy and convert it into a monochromatic red light and emit it, and the red light color in the red region R will become more pure; the quantum dot 131 in the green region G
  • the light energy emitted by the light source can be absorbed by the light of the green light energy and converted into a monochromatic green light and emitted, and the green light color in the green area G will become more pure, and the quantum dot 131 in the blue area B can be
  • the light energy emitted by the light source is greater than the light absorption of the blue light energy and converted into a monochromatic blue light and emitted, so that the blue color in the blue region B becomes more pure.
  • the material of the quantum dot 131 in the embodiment of the present invention is water-soluble or oil-soluble.
  • Quantum dots have a variety of structures.
  • the quantum dot 131 may be a core-shell type quantum dot, the core material of the core-shell type quantum dot is cadmium telluride, the shell material is sulfide or cadmium sulfide; or the core material of the core-shell quantum dot is indium phosphide.
  • the shell material is tin sulfide.
  • core-shell type quantum dots it is meant that the quantum dots have a core and a shell surrounding the core.
  • the core material of the quantum dot is cadmium telluride and the shell material is cadmium sulfide
  • the red region of the color filter layer has a quantum dot size of 3.2 nm to 3.9 nm, and the color filter layer is green.
  • the size of the quantum dots in the region is 2.2 nm to 3.2 nm
  • the size of the quantum dots in the blue region of the color filter layer is 1.7 nm to 2.2 nm.
  • the quantum dot may be a core-shell type quantum dot having a double shell having a structure of a core, an inner shell, and an outer shell.
  • the nuclear material is cadmium telluride
  • the inner shell material is cadmium sulfide
  • the outer shell material is vulcanized.
  • the red region of the color filter layer has a quantum dot size of 4.3 nm to 4.9 nm
  • the green region of the color filter layer has the quantum dot
  • the size of the color filter layer is 3.3 nm to 4.3 nm
  • the blue region of the color filter layer has a size of the quantum dot of 2.8 nm to 3.3 nm.
  • the mass percentage of quantum dots doped in the color filter layer is greater than 0 and less than 20%. Such as 5%, 10%, 15%, 20%, etc., here is no longer - repeat.
  • An embodiment of the present invention further provides a display panel comprising: any of the color film substrates mentioned in Embodiment 1.
  • the color filter layer in the color filter substrate has quantum dots. Due to the quantum size effect and the Stokes shift effect, the quantum dots can make the color of the color region of the color filter layer more pure, thereby improving the brightness of the display panel.
  • the display panel in the embodiment of the present invention may be a liquid crystal display panel or an OLED (Organic Light Emitting Diode) display panel or any other display panel requiring a color film substrate.
  • OLED Organic Light Emitting Diode
  • An embodiment of the present invention further provides a display device, including: the display panel mentioned in Embodiment 2. Since the display panel has a high brightness, the display device provided by the present invention has a good display effect.
  • the display device of the embodiment of the present invention may be any product or component having an display function such as an Organic Light Emitting Diode (OLED) panel, a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, or a tablet computer.
  • OLED Organic Light Emitting Diode
  • LCD Organic Light Emitting Diode

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Abstract

提供一种彩膜基板（1）、显示面板及显示装置。显示面板上具有多个像素，每个像素中具有不同颜色的多个亚像素单元，彩膜基板（1）包括：衬底（11），形成在衬底（11）上的多个黑矩阵（12），黑矩阵（12）之间具有多个与亚像素单元一一对应的开口区域，填充于每一个开口区域内的彩色滤光层（13）；彩色滤光层（13）内掺杂有量子点（131），量子点（131）被激发后产生的光的颜色与对应的亚像素单元的颜色相同。因此，彩膜基板（1）提高了彩色滤光层（13）的纯度，进而提高了显示装置的显示色域。

Description

一种彩膜基板、 显示面板及显示装置 技术领域
本发明的实施例涉及一种彩膜基板、 显示面板及显示装置。 背景技术
近年来随着科学技术的不断进步， 液晶显示（Liquid Crystal Display, 筒 称 LCD )技术的不断完善， 液晶显示产品逐渐遍布我们生活的每个角落， 消 费者对液晶显示的品质要求也越来越高。
如图 1所示， 现有的彩膜基板包括基板 11 , 以及位于基板 11上的彩色 滤光层 12和黑矩阵 13, 彩膜基板应用在显示装置中， 背光源一般为白色背 光， 该白色背光含有蓝光与黄光的混光， 色彩不纯， 该白色背光经过彩膜基 板中彩色滤光层 13的红绿蓝三原色（R\G\B )过滤后所得到单色光包含期望 之外的多种颜色， 这样就导致显示色域比较低， 颜色不够真实。 发明内容
本发明的实施例的一个目的是提供一种彩膜基板， 提高了彩色滤光层的 纯度， 进而提高了显示装置的显示色域。
本发明的实施例还提供了一种显示面板和显示装置， 具有高亮度和良好 的显示效果。
为达到上述目的， 本发明的实施例提供如下技术方案：
一种用于显示面板的彩膜基板， 所述显示面板上具有多个像素， 每个像 素中具有不同颜色的多个亚像素单元， 所述彩膜基板包括： 村底， 形成在所 述村底上的多个黑矩阵， 所述黑矩阵之间具有与所述亚像素单元——对应的 多个开口区域， 填充于每一个所述开口区域内的彩色滤光层；
所述彩色滤光层中掺杂有量子点， 所述量子点被激发后产生的光的颜色 与对应的所述亚像素单元的颜色相同。
根据本发明的一个实施例， 所述量子点的材料包括碎化镓、 磷化铟、 硫 化辞、 疏化镉、 或硒化镉中的至少一种。 根据本发明的一个实施例， 所述彩色滤光层具有分别对应于红绿蓝三原 色的红色区域、 绿色区域以及蓝色区域， 当所述量子点的材料为硒化镉时， 所述彩色滤光层的红色区域具有的所述量子点的尺寸为 3nm~3.5nm; 所述彩 色滤光层的绿色区域具有的所述量子点的尺寸为 2nm~3nm;所述彩色滤光层 的蓝色区域具有的所述量子点的尺寸为 1.5nm~2nm。
根据本发明的一个实施例， 所述量子点为核壳型， 所述量子点的核材质 为石西化镉， 壳材质为硫化辞或硫化镉； 或者， 所述核壳型量子点的核材质为 磷化铟， 壳材质为硫化锡。
当所述量子点的核材料为踊化镉， 壳材料为硫化镉时， 所述彩色滤光层 的红色区域具有的量子点的尺寸为 3.2nm~3.9nm, 所述彩色滤光层的绿色区 域具有的所述量子点的尺寸为 2.2 nm~3.2nm, 所述彩色滤光层的蓝色区域具 有的所述量子点的尺寸为 1.7 nm~2.2nm。
根据本发明的一个实施例，所述量子点可以为具有双壳的核壳型量子点， 例如， 核材料为硒化镉， 内壳材料为疏化镉， 夕卜壳材料为疏化辞。 在采用该 双壳的核壳型量子点时， 所述彩色滤光层的红色区域具有的量子点的尺寸为 4.3nm~4.9nm,所述彩色滤光层的绿色区域具有的所述量子点的尺寸为 3.3nm ~4.3nm , 所述彩色滤光层的蓝色区域具有的所述量子点的尺寸为 2.8nm ~3.3nm。
所述彩色滤光层还包括彩色光阻材料， 根据彩色光阻材料是水溶性或油 溶性， 选择所述量子点的材料为水溶性或油溶性。
例如， 所述彩色滤光层内掺杂的量子点的质量百分比范围内大于 0且小 于 20%。
本发明的实施例还提供了一种显示面板， 包括： 上述技术方案中所提到 的任一种彩膜基板。 本发明的实施例还提供了一种显示装置， 包括： 上述显示面板。
本发明的实施例提供的彩膜基板， 用于显示面板， 所述显示面板上具有 多个像素，每个像素中具有多个颜色不同的亚像素单元，所述彩膜基板包括： 村底， 形成在所述村底上的多个黑矩阵， 所述黑矩阵之间具有与所述亚像素 单元——对应的多个开口区域，填充于每一个所述开口区域内的彩色滤光层； 所述彩色滤光层内掺杂有量子点， 所述量子点被激发后产生的光的颜色 与对应的所述亚像素单元的颜色相同。
量子点 (Quantum Dot, 筒称 QD), 通常是一种由 II-V1族或 III-V族元素 组成的纳米颗粒，尺寸小于或者接近激子波尔半径（一般直径不超过 10nm ), 具有明显的量子效应。 一般认为量子点是一种准零维材料， 是一种能够在三 个空间方向上束缚住导带电子、 价带空穴及激子的半导体纳米结构。
当纳米材料的粒子尺寸下降到某一数值（一般为 10nm以下） 时， 金属 费米能级附近的电子能级由准连续变为离散能级， 纳米半导体微粒不连续的 最高被占据分子轨道和最低未被占据的分子轨道能级的能隙变宽， 从而引起 吸收和荧光语峰的蓝移， 这种现象称为量子尺寸效应。
量子尺寸效应使得半导体量子点的光电性质产生了巨大的变化， 当半导 体量子点颗粒的尺寸小于激子的玻尔半径时所产生的量子尺寸效应改变了半 导体材料的能级结构， 使之由一个连续的能带结构转变为具有分子特性的分 立能级结构。 利用这一现象即可在同一种反应中制备出不同粒径的半导体量 子点， 产生不同频率的光发射， 从而可以方便地产生多种颜色的光。
固体吸收光子（吸收）的能量将大于辐射光子（发光）， 因此发光光语与 吸收光语相比， 将向能量较低的方向偏移（红移）， 两个光子能量的差值称为 斯托克斯位移（Stokes Shift )。 量子点具有大斯托克斯位移。 量子点不同于有 机染料的另一光学性质是大斯托克斯位移， 这样可以避免发射光谱与激发光 谱的重叠， 有利于检测荧光光语信号。
本发明的实施例提供的彩膜基板应用在显示装置中， 量子点由于量子尺 寸效应和斯托克斯位移效应而具有窄的发射光语和高发光效率， 每一种颜色 的亚像素单元对应的彩色滤光层内的量子点可吸收显示装置中的背光源发出 的光的能量大于该亚像素单元颜色能量的光， 并将吸收的这部分光高效转化 为该亚像素单元颜色的单色光并发射出去， 使得该颜色的亚像素单元对应的 彩色滤光层的颜色更纯， 饱和度更高。
所以， 本发明的实施例提供的彩膜基板提高了从彩色滤光层发出的光的 颜色的纯度， 进而提高了显示装置的显示色域。
另外， 本发明的实施例提供的显示面板和显示装置， 由于采用了上述彩 膜基板， 所以具有高的亮度和良好的显示效果。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图作 筒单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例， 而非对本发明的限制。
图 1为现有技术的彩膜基板结构示意图； 以及
图 2为本发明实施例的彩膜基板结构示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例的附图，对本发明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发明的一部分实施例， 而不是全部的实施例。 基于所描 述的本发明的实施例， 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， 都属于本发明保护的范围。
需要说明的是， 在显示领域中， 彩色滤光层的颜色并不限于 RGB ( Red Green Blue, 红绿蓝）三原色， 还可以为 RGBW ( Red Green Blue White, 红 绿蓝白）、 RGBY( Red Green Blue Yellow,红绿蓝黄）或 CMYK( Cyan Magenta Yellow blacK, 青品红黄黑）等多种颜色组合。
为方便说明， 下面的实施例中均按照 RGB三原色模式进行详述， 但本 发明中的实施例不仅限于此。
实施例一
本发明的实施例提供了一种用于显示面板的彩膜基板 1 , 显示面板上具 有多个像素， 每个像素中具有不同颜色的多个亚像素单元， 如图 2所示， 彩 膜基板 1包括： 村底 11 , 形成在村底 11上的多个黑矩阵 12, 黑矩阵 12之间 具有与亚像素单元——对应的多个开口区域， 填充于每一个开口区域内的彩 色滤光层 13;
彩色滤光层 13内掺杂有量子点 131 ,量子点 131被激发后产生的光的颜 色与对应的亚像素单元的颜色相同。
彩色滤光层 13还包括彩色光阻材料，量子点掺杂在彩色光阻材料中。所 述彩色光阻材料一般包括着色剂、 粘结剂树脂&交联剂、 溶剂以及光聚合引 发剂等。 着色剂有酸性染料、 碱性染料、 非离子性染料等等， 例如红色酸性 染料包括 C.L活性红 120等偶氮系酸性染料， 绿色酸性染料包括 C.L直接绿 59等偶氮系酸性染料， 蓝色酸性染料包括 C.L活性蓝 49等蒽醌系酸性染料。 粘结剂&交联剂包括甲基丙烯酸甲酯（PMMA ), 聚乙二醇（PEG )等聚合材 料， 一般聚合度为 2-10。 溶剂包括丙烯酸， 苯乙烯， 乙醇等或者粘结剂中的 单体。 光聚合引发剂包括苯乙酮系化合物、 重氮系化合物等， 例如二苯甲酮。
量子点 (Quantum Dot, 筒称 QD), 通常是由 II-V1族或 III-V族元素组成 的纳米颗粒， 尺寸小于或者接近激子波尔半径（一般直径不超过 10nm ), 具 有明显的量子效应。 量子点通常被认为是一种准零维材料， 是一种能够在三 个空间方向上束缚住导带电子、 价带空穴及激子的半导体纳米结构。
当半导体纳米结构的微粒尺寸下降到某一数值 (一般为 10nm以下）时， 金属费米能级附近的电子能级由准连续变为离散能级， 纳米半导体微粒不连 续的最高被占据分子轨道和最低未被占据的分子轨道能级的能隙变宽， 从而 弓 )起吸收和荧光谱峰的蓝移， 这种现象称为量子尺寸效应。
量子尺寸效应使得半导体量子点的光电性质产生了巨大的变化， 当半导 体量子点颗粒的尺寸小于激子的玻尔半径时所产生的量子尺寸效应改变了半 导体材料的能级结构， 使之由一个连续的能带结构转变为具有分子特性的分 立能级结构。 利用这一现象即可在同一种反应中制备出不同粒径的半导体量 子点， 产生不同频率的光发射， 从而可以方便产生多种颜色的光。
固体吸收光子（吸收）的能量将大于辐射光子（发光）， 因此发光光语与 吸收光语相比， 将向能量较低的方向偏移（红移 ), 两个光子能量的差值称为 斯托克斯位移（Stokes Shift )。 量子点具有大斯托克斯位移。 量子点不同于有 机染料的另一光学性质是大斯托克斯位移， 这样可以避免发射光谱与激发光 谱的重叠， 有利于检测荧光光语信号。
在本发明的实施例中， 量子点掺杂在彩色滤光层中， 即， 掺杂在彩色光 阻材料中， 根据彩色光阻材料是油溶性或者水溶性， 选择量子点材料为油溶 性或者水溶性。 当彩色滤光层中采用有机染料时， 将油溶性量子点掺杂在彩 色滤光层中， 当彩色滤光层中采用无机染料时， 将水溶性量子掺杂在彩色滤 光层中。
本发明的实施例提供的彩膜基板应用在显示装置中， 量子点 131由于量 子尺寸效应和斯托克斯位移效应而具有窄的发射光语和高发光效率， 每一种 颜色的亚像素单元对应的彩色滤光层 13内的量子点 131可吸收显示装置中的 背光源发出的光的能量大于该亚像素单元颜色能量的光， 并将吸收的这部分 光高效转化为对应于该亚像素单元颜色的单色光并发射出去， 使得该颜色的 亚像素单元对应的彩色滤光层 13的颜色纯， 饱和度高。
从而， 本发明提供的彩膜基板提高了彩色滤光层的颜色纯度， 进而提高 了显示装置的显示色域。
进一步地， 上述量子点的材料包括砷化镓、 磷化铟、 硫化辞、 硫化镉、 或石西化镉中的至少一种。
更进一步地， 例如， 如图 2所示， 本发明的实施例中彩色滤光层 13具有 分别对应于红绿蓝三原色的红色区域1、 绿色区域 G以及蓝色区域 B, 当量 子点的材料为踊化镉时， 彩色滤光层 13的红色区域 R具有的量子点 131的 尺寸为 3nm~3.5nm; 彩色滤光层 13的绿色区域 G具有的量子点 131的尺寸 为 2nm~3nm; 彩色滤光层 13 的蓝色区域 B 具有的量子点 131 的尺寸为 1.5nm~2nm。也就是说，位于彩色滤光层 13的红色区域 R、绿色区域 G和蓝 色区域 B内的量子点的尺寸不同， 由于量子点的尺寸效应和斯托克斯位移效 应， 红色区域 R内的量子点 131可以将光源发出的光能量大于红光能量的光 吸收并转化为单色红光并发射出去， 红色区域 R内的红光颜色将变得更纯； 绿色区域 G内的量子点 131可以将光源发出的光能量大于绿光能量的光吸收 并转化为单色绿光并发射出去， 绿色区域 G内的绿光颜色将变得更纯， 蓝色 区域 B内的量子点 131可以将光源发出的光能量大于蓝光能量的光吸收并转 化为单色蓝光并发射出去， 使得蓝色区域 B内的蓝光颜色变得更纯。
例如， 本发明实施例中的量子点 131的材料具有水溶性或油溶性。
量子点具有多种结构。 例如， 量子点 131可以为核壳型量子点， 核壳型 量子点的核材质为踊化镉， 壳材质为硫化辞或硫化镉； 或者， 核壳型量子点 的核材质为磷化铟， 壳材质为硫化锡。
所谓核壳型量子点， 指的是量子点具有核和壳， 所述壳围绕所述核。 当所述量子点的核材料为踊化镉， 壳材料为硫化镉时， 所述彩色滤光层 的红色区域具有的量子点的尺寸为 3.2nm~3.9nm, 所述彩色滤光层的绿色区 域具有的所述量子点的尺寸为 2.2nm ~3.2nm, 所述彩色滤光层的蓝色区域具 有的所述量子点的尺寸为 1.7nm ~2.2nm。 作为本发明的改进型实施例 , 所述量子点可以为具有双壳的核壳型量子 点， 该量子点具有核、 内壳和外壳的结构。 例如， 核材料为踊化镉， 内壳材 料为硫化镉， 外壳材料为硫化辞。 在采用该双壳的核壳型量子点时， 所述彩 色滤光层的红色区域具有的量子点的尺寸为 4.3nm~4.9nm, 所述彩色滤光层 的绿色区域具有的所述量子点的尺寸为 3.3nm ~4.3nm, 所述彩色滤光层的蓝 色区域具有的所述量子点的尺寸为 2.8nm ~3.3nm。
例如， 上述彩色滤光层内掺杂的量子点的质量百分比为大于 0且小于等 于 20%。 如 5%、 10%、 15%、 20%等， 这里就不再——赘述。
实施例二
本发明的实施例还提供了一种显示面板， 包括： 实施例一中提到的任一 种彩膜基板。 彩膜基板中的彩色滤光层内具有量子点， 由于量子尺寸效应和 斯托克斯位移效应， 量子点可以使彩色滤光层的彩色区域的颜色更纯， 进而 可以提高显示面板的亮度。
本发明的实施例中的显示面板可以为液晶显示面板或 OLED ( Organic Light Emitting Diode, 有机发光二极管）显示面板或其他需要彩膜基板的任 何显示面板。
实施例三
本发明的实施例还提供了一种显示装置， 包括： 实施例二中提到的显示 面板。 由于显示面板具有较高的亮度， 所以， 本发明提供的显示装置， 具有 良好的显示效果。
本发明中实施例的显示装置可以为有机发光二极管 （Organic Light Emitting Diode, OLED ) 面板、 液晶电视、 液晶显示器、 数码相框、 手机、 平板电脑等具有显示功能的任何产品或部件。 变型而不脱离本发明的精神和范围。 如果本发明的这些修改和变型属于本发 明权利要求所限定的保护范围及其等同技术方案的范围之内， 则本发明也意 图包含这些改动和变型在内。
以上所述仅是本发明的示范性实施方式， 而非用于限制本发明的保护范 围， 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1. 一种用于显示面板的彩膜基板（1) , 所述显示面板上具有多个像素， 每个像素中具有不同颜色的多个亚像素单元，所述彩膜基板包括：村底（ 11), 形成在所述村底上的多个黑矩阵（12) , 所述黑矩阵（12)之间具有与所述 亚像素单元——对应的多个开口区域， 以及填充于每一个所述开口区域内的 彩色滤光层 (13) ； 其中，
所述彩色滤光层 (13) 内掺杂有量子点 （131) , 所述量子点 （131)被 激发后产生的光的颜色与对应的所述亚像素单元的颜色相同。
2.根据权利要求 1所述的彩膜基板（ 1 ) ,其特征在于，所述量子点（ 131 ) 的材料包括砷化镓、 磷化铟、 硫化辞、 硫化镉、 或硒化镉中的至少一种。
3. 根据权利要求 1或 2所述的彩膜基板（ 1 ) , 其中， 所述彩色滤光层 (13)具有红色区域（R) 、 绿色区域（G) 以及蓝色区域（Β) , 当所述量 子点（131)的材料为踊化镉时， 掺杂在所述彩色滤光层的红色区域（R) 中 的所述量子点 （131) 的尺寸为 3nm~3.5nm; 掺杂在所述彩色滤光层的绿色 区域（G) 中的所述量子点 （131) 的尺寸为 2nm~3nm; 掺杂在所述彩色滤 光层的蓝色区域（B) 中的所述量子点 （131) 的尺寸为 1.5nm~2nm。
4. 根据权利要求 1至 3中任何一项所述的彩膜基板（ 1 ) , 其中， 所述 彩色滤光层还包括着色剂、 粘结剂和交联剂、 溶剂以及光聚合引发剂。
5. 根据权利要求 1至 4中任何一项所述的彩膜基板（1) , 其中， 所述 量子点（ 131 )的材料具有水溶性或油溶性， 所述量子点的材料的水溶性或油 溶性根据所述彩色滤光层的水溶性或油溶性决定。
6. 根据权利要求 1或 2所述的彩膜基板（ 1 ) , 其中， 所述量子点（ 131 ) 为核壳型量子点， 所述核壳型量子点的核材质可以为硒化镉， 壳材质可以为 硫化辞或硫化镉； 或者，
所述核壳型量子点（ 131 )的核材质可以为磷化铟，壳材质可以为硫化锡。
7. 根据权利要求 6所述的彩膜基板（ 1 ) ， 其中， 所述量子点的核材料 为硒化镉， 壳材料为硫化镉， 所述彩色滤光层的红色区域具有的量子点的尺 寸为 3.2nm~3.9nm, 所述彩色滤光层的绿色区域具有的所述量子点的尺寸为 2.2 nm ~3.2nm, 所述彩色滤光层的蓝色区域具有的所述量子点的尺寸为 1.7 nm ~2.2nm„
8. 根据权利要求 1或 2所述的彩膜基板（ 1 ), 其中， 所述量子点（ 131 ) 为双壳的核壳型量子点， 核材料为踊化镉， 内壳材料为硫化镉， 外壳材料为 硫化辞， 所述彩色滤光层的红色区域具有的量子点的尺寸为 4.3nm~4.9nm, 所述彩色滤光层的绿色区域具有的所述量子点的尺寸为 3.3 nm ~4.3nm,所述 彩色滤光层的蓝色区域具有的所述量子点的尺寸为 2.8 nm ~3.3nm。
9. 根据权利要求 1至 8任一项所述的彩膜基板（ 1 ), 其中， 所述彩色滤 光层内掺杂的量子点的质量百分比为大于 0且小于等于 20%。
10. 一种显示面板， 包括： 如权利要求 1至 9中任一项所述的彩膜基板 ( 1 )。
11. 一种显示装置， 包括： 如权利要求 10中所述的显示面板。
PCT/CN2013/089139 2013-04-22 2013-12-11 一种彩膜基板、显示面板及显示装置 Ceased WO2014173137A1 (zh)

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