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WO2021120291A1 - 黑矩阵组合物、液晶显示面板及其制备方法 - Google Patents

黑矩阵组合物、液晶显示面板及其制备方法 Download PDF

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Publication number
WO2021120291A1
WO2021120291A1 PCT/CN2019/129031 CN2019129031W WO2021120291A1 WO 2021120291 A1 WO2021120291 A1 WO 2021120291A1 CN 2019129031 W CN2019129031 W CN 2019129031W WO 2021120291 A1 WO2021120291 A1 WO 2021120291A1
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Prior art keywords
layer
black matrix
liquid crystal
array substrate
display panel
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PCT/CN2019/129031
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English (en)
French (fr)
Inventor
白柏
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Tcl华星光电技术有限公司
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Priority to US16/627,803 priority Critical patent/US11061294B1/en
Publication of WO2021120291A1 publication Critical patent/WO2021120291A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004—Photosensitive materials
    • G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
    • G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
    • G03F7/033—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
    • 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
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004—Photosensitive materials

Definitions

  • This application relates to the field of display technology, in particular to a black matrix composition, a liquid crystal display panel and a preparation method thereof.
  • TFT-LCD Thin Film Transistor Liquid Crystal Display
  • liquid crystal and frame sealant need to be dripped on the array substrate or color film substrate, and then the two substrates are bonded together in a vacuum environment , And then solidify the frame sealant.
  • the frame sealant is used to bond the array substrate and the color film substrate, and protect the liquid crystal in the middle from outside air and water.
  • the curing process of the frame sealant for PSVA-LCD panels is mainly divided into two steps: first curing by ultraviolet light, and then heating to further achieve the purpose of complete curing.
  • BM black matrix
  • the metal traces around the array substrate have become more dense, so that most of the light that can pass through the metal traces when the frame sealant is cured by UV is blocked by the metal traces, and the UV light intensity is greater Weakened, resulting in incomplete curing of the frame sealant, and the density of metal traces around the panel changes with different positions, resulting in uneven changes in the curing rate of the frame sealant in different areas, which may result in the thickness of the peripheral cell of the LCD panel Uneven (Mura), liquid crystal puncture and other problems occur.
  • the monomer in the liquid crystal reacts in the 313-320nm band.
  • the sealant is not cured completely, the photoinitiator and acrylic in the sealant are easy to precipitate and react with the monomer in the liquid crystal.
  • the lamp tube illuminates the entire surface, and the utilization rate is low while the energy consumption increases.
  • the purpose of the present disclosure is to provide a black matrix composition, a liquid crystal display panel and a preparation method thereof, so as to solve the incomplete and uneven curing of the sealant of the liquid crystal display panel in the prior art, which is likely to cause the peripheral cell of the liquid crystal display panel Technical problems of uneven thickness (Mura) and liquid crystal puncture.
  • Mura uneven thickness
  • the present disclosure provides a black matrix composition for forming a black matrix layer.
  • the components and the weight percentages of the components are: inorganic filler, 5-10%; alkali-soluble oligomer, 5 -10%; crosslinking agent, 5-10%; photopolymerization initiator, 1%; thermochromic agent, 1-10%; and solvent, 60-85%.
  • the inorganic filler is carbon black, and the particle size of carbon black ranges from 10-200 nm.
  • the molecular weight of the alkali-soluble oligomer ranges from 1,000 to 10,000, and its structural formula is selected from at least one of the following structural formulas:
  • the structural formula of the crosslinking agent is selected from at least one of the following structural formulas:
  • the structural formula of the photopolymerization initiator is selected from at least one of the following structural formulas:
  • thermochromic agent includes at least one of 2Cu(CNS)2pyridine and ammonium metavanadate.
  • the solvent includes at least one of 3-ethoxy ethyl propionate, propylene glycol ethyl ether acetate, propylene glycol methyl ether acetate, and cyclohexanone.
  • the present disclosure also provides a liquid crystal display panel, which includes a black matrix layer made of the black matrix composition described above, an array substrate, a liquid crystal layer, a sealant layer, and a transparent electrode layer.
  • a black matrix layer made of the black matrix composition described above
  • an array substrate a liquid crystal layer
  • a sealant layer is provided on the surface of one side of the array substrate and surrounds the edge of the liquid crystal layer
  • the transparent electrode layer is provided On the liquid crystal layer, the surface of the sealant layer on the side away from the array substrate
  • the black matrix layer is provided on the surface of the transparent electrode layer on the side away from the array substrate, and corresponds to the sealant Floor.
  • the present disclosure also provides a method for manufacturing a liquid crystal display panel, which includes the following steps: an array substrate setting step, an array substrate is provided on the upper surface of a carrier; a liquid crystal layer preparation step, on the upper surface of the array substrate Prepare a liquid crystal layer, the liquid crystal layer corresponding to the middle of the array substrate; the preparation step of the sealant layer, prepare a sealant layer on the upper surface of the array substrate, the sealant layer surrounds the edge of the liquid crystal layer; transparent electrode The layer preparation step is to prepare a transparent electrode layer on the upper surface of the liquid crystal layer and the sealant layer; and the black matrix layer preparation step is to prepare a black matrix layer on the upper surface of the transparent electrode layer, and the black matrix layer corresponds to The frame glue layer.
  • the method further includes: a temperature detection step, which detects the temperature of the liquid crystal display panel; a light curing step, which performs a light curing treatment on the sealant layer; wherein In the temperature detection step, when the temperature of the liquid crystal display panel is less than or equal to 50°, the black matrix layer is black, and when the temperature of the liquid crystal display panel is greater than or equal to 60°, the black matrix layer is transparent .
  • the technical effect of the present disclosure is to provide a black matrix composition, a liquid crystal display panel and a preparation method thereof.
  • the black matrix layer is prepared from the black matrix composition.
  • the temperature of the black matrix layer is less than or equal to 50°, the black matrix layer is Black; when the temperature is greater than or equal to 60°, the black matrix layer is completely transparent.
  • the liquid crystal display panel is heated to a high temperature, the black matrix is in a completely transparent state, and UV light is irradiated on the sealant layer through the color film substrate and the transparent electrode layer, and the sealant The layer is subjected to light curing treatment without being blocked by the metal wiring layer, so that the sealant layer is fully cured and uniformly cured, and the yield of the liquid crystal display panel is improved.
  • FIG. 1 is a schematic diagram of the structure of the liquid crystal display panel according to the embodiment.
  • FIG. 2 is a flow chart of the method for manufacturing the liquid crystal display panel according to this embodiment.
  • FIG. 3 is a schematic diagram of the structure of the liquid crystal display panel in the manufacturing process of the embodiment.
  • FIG. 4 is a schematic diagram of the structure of the liquid crystal display panel in the prior art.
  • 201PI substrate 101 base substrate; 102 metal wiring layer.
  • This embodiment provides a black matrix composition used to form a black matrix layer.
  • the components and the weight percentages of the components are: inorganic filler, 5-10%; alkali-soluble oligomer, 5-10%; Crosslinking agent, 5-10%; photopolymerization initiator, 1%; thermochromic agent, 1-10%; and solvent, 60-85%.
  • the inorganic filler is carbon black
  • the single particle of carbon black has a size range of 10-200 nm, which has good shading properties.
  • the particle size of the carbon black is in the range of 10-80 nm, so that it is in a monodispersed state in the black matrix layer, has a good dispersion effect, and makes the shading effect of the black matrix layer more uniform.
  • the molecular weight of the alkali-soluble oligomer ranges from 1000 to 10000, and its structural formula is selected from at least one of the following structural formulas:
  • the crosslinking agent includes two or more polymerizable double bond compounds, the structural formula of which is selected from at least one of the following structural formulas:
  • the structural formula of the photopolymerization initiator is selected from at least one of the following structural formulas:
  • thermochromic agent includes at least one of 2Cu(CNS)2.2pyridine and ammonium metavanadate (NH4VO3).
  • the solvent includes at least one of 3-ethoxy ethyl propionate, propylene glycol ethyl ether acetate, propylene glycol methyl ether acetate, and cyclohexanone.
  • this embodiment also provides a liquid crystal display panel, including an array substrate 1, a liquid crystal layer 2, a sealant layer 3, a transparent electrode layer 4, a black matrix layer 5, a pixel definition layer 6 and a color filter substrate 7. .
  • the liquid crystal display panel is divided into a display area and a non-display area surrounding the display area, the display area is an area for displaying images, and the non-display area does not display images.
  • the array substrate 1 includes a base substrate 101 and a metal wiring layer 102.
  • the metal wiring layer 102 includes a plurality of metal wirings arranged on the upper surface of the base substrate 101 at intervals.
  • the liquid crystal layer 2 is provided on the upper surface of the array substrate 1 and corresponds to the middle of the array substrate 1.
  • the liquid crystal layer 2 is located in the display area, and the upper and lower sides of the liquid crystal layer 2 are respectively provided with PI substrates 201 for aligning the liquid crystal, and the liquid crystal is rotated under the action of voltage to realize display.
  • the sealant layer 3 is located in the non-display area, is annularly arranged on the upper surface of the array substrate 1 and surrounds the edge of the liquid crystal layer 2.
  • the transparent electrode layer 4 is provided on the upper surface of the liquid crystal layer 2 and the sealant layer 3.
  • the transparent electrode layer 4 is usually an ITO (Indium Tin Oxide) electrode.
  • the black matrix layer 5 is annularly arranged on the upper surface of the transparent electrode layer 4 and corresponds to the sealant layer 3.
  • the material of the black matrix layer 5 includes inorganic fillers, alkali-soluble oligomers, crosslinking agents, photopolymerization initiators, thermochromic agents, and solvents.
  • the inorganic filler is carbon black, which has good shading properties.
  • the size range of the single carbon black particles is 10-200 nm.
  • the size of the carbon black particles is in the range of 10-80 nm, so that they are in a monodispersed state in the black matrix layer 5 and have a good dispersion effect, so that the light shielding effect of the black matrix layer 5 is more uniform.
  • the black matrix layer 5 when the temperature of the black matrix layer 5 is less than or equal to 50°, the black matrix layer is black; when the temperature is greater than or equal to 60°, the black matrix layer is transparent. Between 50°-60°, the black matrix layer 5 is a gradual process, that is, it slowly transforms from black to gray, and finally becomes transparent. Those skilled in the art can apply the sealant according to the discoloration state of the black matrix layer 5. Layer 3 undergoes light curing treatment.
  • the pixel defining layer 6 is located in the display area, is provided on the upper surface of the transparent electrode layer 4 and corresponds to the liquid crystal layer 2.
  • the pixel definition layer 6 includes red sub-pixels, green sub-pixels, and blue sub-pixels.
  • the color filter substrate 7 is arranged on the upper surface of the black matrix layer 5 and the pixel definition layer 6.
  • the black matrix layer is applied to a liquid crystal display panel, which can improve its contrast and prevent color mixing between sub-pixels of different colors. It can also be used to block and absorb light from the outside and prevent light from irradiating the film.
  • the active layer of the transistor the excellent off-state characteristics of the thin film transistor are ensured, and the gaps between the signal lines and other electrode lines on the array substrate can be blocked to prevent light leakage and reduce image contrast.
  • this embodiment also provides a method for manufacturing a liquid crystal display panel, which includes the following steps S1 to S9.
  • an array substrate 1 is provided on the upper surface of a stage 100.
  • the array substrate includes a base substrate and a metal wiring layer, and a plurality of metal wiring layers are arranged on the upper surface of the base substrate at intervals.
  • a liquid crystal layer 2 is prepared on the upper surface of the array substrate 1, and the liquid crystal layer 2 corresponds to the middle of the array substrate 1, refer to FIG. 3.
  • the upper and lower sides of the liquid crystal layer 2 are respectively provided with PI substrates 201 for aligning the liquid crystal, and the liquid crystal is rotated under the action of voltage to realize display.
  • a frame glue layer 3 is prepared on the upper surface of the array substrate 1, and the frame glue layer 3 surrounds the edge of the liquid crystal layer 2, as shown in FIG.
  • OCA glue Optically Clear Adhesive
  • one side of OCA glue is coated on the upper surface of the array substrate, which has good light transmittance, high adhesion, water resistance, high temperature resistance, and UV resistance.
  • a transparent electrode layer 4 is prepared on the upper surface of the liquid crystal layer 2 and the sealant layer 3, as shown in FIG. 3.
  • the transparent electrode layer is transparent and has good light transmittance.
  • a black matrix layer 5 is prepared on the upper surface of the transparent electrode layer 4, and the black matrix layer 5 corresponds to the sealant layer 3, refer to FIG. 3.
  • the material of the black matrix layer includes inorganic filler, alkali-soluble oligomer, crosslinking agent, photopolymerization initiator, thermochromic agent and solvent.
  • the inorganic filler is carbon black, which has good shading properties. The size range of the single carbon black particles is 10-200 nm.
  • the particle size of the carbon black is in the range of 10-80 nm, so that it is in a monodispersed state in the black matrix layer 5 and has a good dispersion effect, so that the light shielding effect of the black matrix layer is more uniform.
  • the pixel definition layer preparation step is to prepare a pixel definition layer 6 on the upper surface of the transparent electrode layer 4, and the pixel definition layer 6 corresponds to the liquid crystal layer 2, refer to FIG. 3.
  • a color filter substrate setting step is to set a color filter substrate 7 on the upper surface of the black matrix layer 5 and the pixel definition layer 6, as shown in FIG. 3.
  • the color filter substrate is a transparent substrate with good light transmittance.
  • the temperature detection step is to perform detection processing on the temperature of the carrier. It should be noted that a temperature detection device is provided in the carrier to detect the temperature change of the liquid crystal display panel.
  • the black matrix layer is black, and when the temperature of the liquid crystal display panel is greater than or equal to 60°, the black matrix layer is transparent. Between 50°-60°, the black matrix layer is a gradual process, that is, it slowly transforms from black to gray, and finally becomes transparent.
  • Those skilled in the art can check the black matrix layer according to the discoloration state of the black matrix layer.
  • the sealant layer is subjected to the next light curing treatment.
  • the light curing step is to perform light curing treatment on the sealant layer.
  • a lamp tube 200 is placed on the color filter substrate, and the liquid crystal display panel is masked by using the mask plate 300, refer to FIG. 3.
  • the lamp tube is an ultraviolet lamp (Ultraviolet, UV), which is invisible light, which is a section of electromagnetic radiation other than visible violet light.
  • the liquid crystal display panel when the temperature detection device detects that the temperature of the liquid crystal display panel is less than or equal to 50°, and the black matrix layer is black, the liquid crystal display panel can be continuously heated; When the temperature of the display panel is greater than or equal to 60°, the black matrix layer is in a transparent state, and the masking plate may be used to perform light curing treatment on the sealant layer. Specifically, the array substrate transfers heat from the sealant layer to the black matrix layer by means of heat transfer. After the black matrix layer is heated, it gradually changes from black to a transparent state. When the temperature of the liquid crystal display panel is greater than or equal to 60°, the black matrix layer is completely transparent.
  • UV light can pass through the color film substrate and the transparent electrode layer to irradiate the sealant layer,
  • the sealant layer is subjected to light curing treatment. Since the sealant layer is not blocked by any components, it can be cured quickly and uniformly, and the adjacent film layers are tightly bonded together, thereby suppressing the cell thickness of the liquid crystal layer. Even, the problem of liquid crystal puncture occurs.
  • the color filter substrate and the transparent electrode layer are both transparent and have good light transmittance, so UV light can be directly irradiated on the sealant layer to make it fully Curing makes the liquid crystal display panel have good sealing properties. In addition to suppressing the occurrence of problems such as uneven thickness of the liquid crystal display panel (Mura) and liquid crystal puncture, it can also isolate water and oxygen and extend the life of the liquid crystal display panel.
  • Mura uneven thickness of the liquid crystal display panel
  • liquid crystal puncture it can also isolate water and oxygen and extend the life of the liquid crystal display panel.
  • the liquid crystal display panel After the preparation of the liquid crystal display panel is completed, the liquid crystal display panel is cooled to a room temperature state, and the black matrix layer changes from a transparent state back to a black opaque state. Therefore, the liquid crystal display panel has a good performance when the liquid crystal display panel is used normally.
  • the light-shielding performance can improve the contrast and prevent the color mixing between different color sub-pixels. It can also be used to block and absorb the incident light from the outside and prevent the light from irradiating the active layer of the thin film transistor, thus ensuring the excellent quality of the thin film transistor
  • the off-state characteristics of the sensor can also block the gaps between the signal lines and other electrode lines on the array substrate to prevent light leakage and reduce image contrast.
  • FIG. 4 is a schematic structural diagram of a prior art liquid crystal display panel.
  • the liquid crystal display panel includes an array substrate 11, a liquid crystal layer 12, a sealant layer 13, a transparent electrode layer 14, a black matrix layer 15, and pixel definitions.
  • the black matrix layer 15 is annularly arranged on the upper surface of the color filter substrate 17 near the edge of the color filter substrate 17.
  • the pixel definition layer 16 is disposed on the upper surface of the color filter substrate 17 and corresponds to the middle of the color filter substrate 17.
  • the transparent electrode layer 14 is provided on the upper surfaces of the black matrix layer 15 and the pixel definition layer 16.
  • the liquid crystal layer 12 is disposed on the upper surface of the transparent electrode layer 14 and corresponds to the pixel definition layer 16.
  • the sealant layer 13 is annularly arranged on the upper surface of the transparent electrode layer 14 and corresponds to the black matrix layer 15.
  • the array substrate 11 is disposed on the upper surface of the sealant layer 13 and the liquid crystal layer 12.
  • the array substrate 11 includes a base substrate 111 and a metal wiring layer 112.
  • the metal wiring layer 112 is provided on the upper surface of the sealant layer 13, and the base substrate 111 is provided on the upper surface of the metal wiring layer 112 and the liquid crystal layer 12.
  • the sealant layer 13 is cured. Because the metal wiring layer of the array substrate easily blocks the UV, the sealant The incomplete and uneven curing of the layer 13 easily leads to technical problems such as uneven cell thickness (mura) of the peripheral cell of the liquid crystal display panel and liquid crystal puncture.
  • the black matrix layer is in a completely transparent state, and UV light can be The transparent color film substrate and the transparent electrode layer are irradiated onto the sealant layer, and the UV light will not be blocked by any components (metal wiring layer), so that the sealant layer is fully cured and uniformly cured.
  • This embodiment provides a black matrix composition, a liquid crystal display panel and a preparation method thereof.
  • the black matrix layer is prepared from the black matrix composition.
  • the temperature of the black matrix layer is less than or equal to 50°, the black matrix layer is black;
  • it is greater than or equal to 60° the black matrix layer is completely transparent. Therefore, in the process of preparing the liquid crystal display panel, the liquid crystal display panel is heated to a high temperature, the black matrix is in a completely transparent state, and UV light is irradiated on the sealant layer through the color film substrate and the transparent electrode layer, and the sealant The layer is subjected to light curing treatment without being blocked by the metal wiring layer, so that the sealant layer is fully cured and uniformly cured, and the yield of the liquid crystal display panel is improved.

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Abstract

一种黑矩阵组合物、液晶显示面板及其制备方法，黑矩阵组合物用于形成黑矩阵层（5），其各组分及各组分的重量百分比为：无机填料，5-10％；碱溶性齐聚物，5-10％；交联剂，5-10％；光聚合引发剂，1％；热致变色剂，1-10％；以及溶剂，60-85％。黑矩阵层（5）由黑矩阵组合物制备，黑矩阵层（5）在温度小于或等于50°时，黑矩阵层（5）为黑色；在温度大于或等于60°时，黑矩阵层（5）为完全透明。

Description

黑矩阵组合物、液晶显示面板及其制备方法 技术领域
本申请涉及显示技术领域，尤其涉及一种黑矩阵组合物、液晶显示面板及其制备方法。
背景技术
在薄膜晶体管液晶显示器(Thin Film Transistor Liquid Crystal Display，TFT-LCD)生产中，需要在阵列基板或者彩膜基板上滴注液晶和封框胶，然后在真空环境下将两基板进行对组贴合，再将封框胶固化，封框胶用于粘接阵列基板和彩膜基板，并且保护中间的液晶不受外界空气和水的影响。
目前，PSVA-LCD面板(聚合物稳定垂直配向液晶显示面板)封框胶的固化工艺主要分为两步：首先采用紫外光照固化，再通过加热进一步达到完全固化的目的。
随着人们对平板显示器要求的提高，窄边框显示面板逐渐成为显示的主流。边框变窄且又不产生漏光，黑矩阵(BM)一般需与封框胶相互重叠，由于紫外光无法通过黑矩阵(BM)，因此封框胶的紫外光固化只能选择从阵列基板侧照射。
然而，因为窄边框的需求，阵列基板周边的金属走线变的更多更密，使封框胶UV固化时能够透过金属走线的光照大部分被金属走线遮挡，UV光照强度大为削弱，导致封框胶固化不完全，而且面板周边金属走线排布密度随不同位置变化而变化，导致不同区域的封框胶的固化率变化不均匀，进而可能造成液晶显示面板的周边盒厚不均(Mura)、液晶穿刺等问题的发生。
另外，对于PSVA技术，液晶中的单体(monomer)在313-320nm波段进行反应，当框胶固化不完全时，框胶中的光引发剂和亚克力等容易析出，与液晶中的monomer发生反应，造成液晶显示面板的周边盒厚不均(Mura)、液晶穿刺的问题。同时，灯管为整面照光，能耗增加的同时，利用率较低。
技术问题
本揭示的目的在于，提供一种黑矩阵组合物、液晶显示面板及其制备方法，以解决现有技术存在的液晶显示面板的框胶固化不完全、不均匀，容易导致液晶显示面板的周边盒厚不均(Mura)、液晶穿刺的技术问题。
技术解决方案
为实现上述目的，本揭示提供一种黑矩阵组合物，用于形成黑矩阵层，其各组分及各组分的重量百分比为：无机填料，5-10％；碱溶性齐聚物，5-10％；交联剂，5-10％；光聚合引发剂，1％；热致变色剂，1-10％；以及溶剂，60-85％。
进一步地，所述无机填料为炭黑，一炭黑的颗粒大小范围为10-200nm。
进一步地，所述碱溶性齐聚物的分子量范围为1000-10000，其结构式选自以下结构式中的至少一种：
Figure PCTCN2019129031-appb-000001
进一步地，所述交联剂的结构式选自以下结构式中的至少一种：
Figure PCTCN2019129031-appb-000002
进一步地，所述光聚合引发剂的结构式选自以下结构式中的至少一种：
Figure PCTCN2019129031-appb-000003
进一步地，所述热致变色剂包括2Cu(CNS)2 2pyridine、偏钒酸铵中的至少一种。
进一步地，所述溶剂包括3-乙氧基丙酸乙酯、丙二醇乙醚乙酸酯、丙二醇甲醚乙酸酯、环己酮中的至少一种。
为实现上述目的，本揭示还提供一种液晶显示面板，包括由前文所述的黑 矩阵组合物制成的黑矩阵层、阵列基板、液晶层、框胶层以及透明电极层，所述液晶层设于所述阵列基板一侧的表面，且对应所述阵列基板中部；所述框胶层设于所述阵列基板一侧的表面，且环绕所述液晶层边缘处；所述透明电极层设于所述液晶层、所述框胶层远离所述阵列基板一侧的表面；以及所述黑矩阵层设于所述透明电极层远离所述阵列基板一侧的表面，且对应所述框胶层。
为实现上述目的，本揭示还提供一种液晶显示面板的制备方法，包括如下步骤：阵列基板设置步骤，在一载台上表面设置一阵列基板；液晶层制备步骤，在所述阵列基板上表面制备一液晶层，所述液晶层对应所述阵列基板中部；框胶层制备步骤，在所述阵列基板上表面制备一框胶层，所述框胶层环绕所述液晶层边缘处；透明电极层制备步骤，在所述液晶层及所述框胶层上表面制备一透明电极层；以及黑矩阵层制备步骤，在所述透明电极层上表面制备一黑矩阵层，所述黑矩阵层对应所述框胶层。
进一步地，在所述黑矩阵层制备步骤之后还包括：温度检测步骤，对所述液晶显示面板的温度进行检测处理；光照固化步骤，对所述框胶层进行光照固化处理；其中，在所述温度检测步骤，当所述液晶显示面板的温度小于或等于50°时，所述黑矩阵层为黑色，当所述液晶显示面板的温度大于或等于60°时，所述黑矩阵层为透明。
有益效果
本揭示的技术效果在于，供一种黑矩阵组合物、液晶显示面板及其制备方法，黑矩阵层由黑矩阵组合物制备，该黑矩阵层在温度小于或等于50°时，黑矩阵层为黑色；在温度大于或等于60°时，黑矩阵层为完全透明。因此，在液晶显示面板制备的过程中，液晶显示面板被加热到高温，黑矩阵呈完全透明状态，UV光透过彩膜基板及透明电极层照射到框胶层上，并对所述框胶层进行光照固化处理，而不会被金属走线层遮挡，使得框胶层充分固化且均匀固化，提升液晶显示面板的良率。。
附图说明
下面结合附图，通过对本申请的具体实施方式详细描述，将使本申请的技术方案及其它有益效果显而易见。
图1为本实施例所述液晶显示面板的结构示意图。
图2为本实施例所述液晶显示面板的制备方法的流程图。
图3为本实施例所述液晶显示面板在制备过程中的结构示意图。
图4为现有技术所述液晶显示面板的结构示意图。
附图中部分标识如下：
本揭示附图标记如下：
1阵列基板；2液晶层；3框胶层；4透明电极层；
5黑矩阵层；6像素定义层；7彩膜基板；
100载台；200灯管；300掩膜板；
201PI基板；101衬底基板；102金属走线层。
现有技术附图标记如下：
11阵列基板；12液晶层；13框胶层；
14透明电极层；15黑矩阵层；16像素定义层；17彩膜基板；
20灯管；21掩膜板；111衬底基板；112金属走线层。
本揭示的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本申请。此外，本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本申请提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
本实施例提供一种黑矩阵组合物，用于形成黑矩阵层，其各组分及各组分的重量百分比为：无机填料，5-10％；碱溶性齐聚物，5-10％；交联剂，5-10％； 光聚合引发剂，1％；热致变色剂，1-10％；以及溶剂，60-85％。
其中，所述无机填料为炭黑，所述炭黑单颗粒的大小范围为10-200nm，具有良好的遮光性能。优选地，所述炭黑的颗粒的大小范围为10-80nm，使得在黑矩阵层中为单分散状态，具有良好的分散效果，使得所述黑矩阵层的遮光效果更加地均匀。
所述碱溶性齐聚物的分子量范围为1000-10000，其结构式选自以下结构式中的至少一种：
Figure PCTCN2019129031-appb-000004
所述交联剂包括两个或以上可聚合双键化合物，其结构式选自以下结构式中的至少一种：
Figure PCTCN2019129031-appb-000005
所述光聚合引发剂的结构式选自以下结构式中的至少一种：
Figure PCTCN2019129031-appb-000006
所述热致变色剂包括2Cu(CNS)2·2pyridine、偏钒酸铵(NH4VO3)中的至少一种。
所述溶剂包括3-乙氧基丙酸乙酯、丙二醇乙醚乙酸酯、丙二醇甲醚乙酸酯、环己酮中的至少一种。所述溶剂
如图1所示，本实施例还提供一种液晶显示面板，包括阵列基板1、液晶层2、框胶层3、透明电极层4、黑矩阵层5、像素定义层6以及彩膜基板7。其中，所述液晶显示面板被划分为显示区和环绕所述显示区的非显示区，所述显示区是用于显示图像的区域，所述非显示区不显示图像。
阵列基板1包括一衬底基板101以及金属走线层102，金属走线层102包括多条金属走线间隔设置于衬底基板101上表面。
液晶层2设于阵列基板1的上表面，且对应阵列基板1中部。液晶层2位于所述显示区，液晶层2上下两侧分别设有PI基板201，用以对液晶进行配向，液晶在电压作用下旋转实现显示。
框胶层3位于所述非显示区，呈环状设于阵列基板1的上表面，且环绕液晶层2边缘处。
透明电极层4设于液晶层2及框胶层3的上表面。透明电极层4通常为ITO(氧化铟锡)电极。
黑矩阵层5呈环状设于透明电极层4的上表面，且对应框胶层3。黑矩阵层5的材质包括无机填料、碱溶性齐聚物、交联剂、光聚合引发剂、热致变色剂以及溶剂。其中，所述无机填料为炭黑，具有良好的遮光性能。所述炭黑单颗粒的大小范围为10-200nm。优选地，所述炭黑的颗粒的大小范围为10-80nm，使得在黑矩阵层5中为单分散状态，具有良好的分散效果，使得黑矩阵层5的遮光效果更加地均匀。
进一步地，黑矩阵层5在温度小于或等于50°时，黑矩阵层为黑色；在温度大于或等于60°时，黑矩阵层为透明。在50°-60°之间，黑矩阵层5为一渐变过程，即由黑色慢慢地转化为灰色，最后变成透明，本领域的技术人员可以根据黑矩阵层5的变色状态对框胶层3进行光照固化处理。
像素定义层6位于所述显示区，设于透明电极层4的上表面，且对应液晶层2。像素定义层6包括红色子像素、绿色子像素以及蓝色子像素。
彩膜基板7设于黑矩阵层5及像素定义层6的上表面。
本实施例中，所述黑矩阵层应用于液晶显示面板，可以提高其对比度，并防止不同颜色子像素之间相互混色，也可以被用来阻挡和吸收外界入射的光线，避免光线照射到薄膜晶体管的有源层上，从而保证薄膜晶体管优良的关态特性，还可以遮挡阵列基板上的信号线其他电极线之间的间隙以防止漏光，避免图像对比度的降低。
如图2所示，本实施例还提供一种液晶显示面板的制备方法，包括如下步骤S1～S9。
S1阵列基板设置步骤，如图3所示，在一载台100上表面设置一阵列基板1。所述阵列基板包括一衬底基板以及金属走线层，多条金属走线层间隔设置于所述衬底基板上表面。
S2液晶层制备步骤，在阵列基板1上表面制备一液晶层2，液晶层2对应阵列基板1中部，参照图3。其中，液晶层2上下两侧分别设有PI基板201，用以对液晶进行配向，液晶在电压作用下旋转实现显示。
S3框胶层制备步骤，在阵列基板1上表面制备一框胶层3，框胶层3环绕液晶层2边缘处，参照图3。优选地，在所述阵列基板上表面涂布一侧OCA胶(Optically Clear Adhesive)，具有良好的透光性、高黏着力、耐水性、耐高温、抗紫外。
S4透明电极层制备步骤，在液晶层2及框胶层3上表面制备一透明电极层4，参照图3。所述透明电极层呈透明，具有良好的透光率。
S5黑矩阵层制备步骤，在透明电极层4上表面制备一黑矩阵层5，黑矩阵层5对应框胶层3，参照图3。其中，所述黑矩阵层的材质包括无机填料、碱溶性齐聚物、交联剂、光聚合引发剂、热致变色剂以及溶剂。本实施例中，所 述无机填料为炭黑，具有良好的遮光性能。所述炭黑单颗粒的大小范围为10-200nm。优选地，所述炭黑的颗粒的大小范围为10-80nm，使得在黑矩阵层5中为单分散状态，具有良好的分散效果，使得所述黑矩阵层的遮光效果更加地均匀。
S6像素定义层制备步骤，在透明电极层4的上表面制备一像素定义层6，像素定义层6对应液晶层2，参照图3。
S7彩膜基板设置步骤，在黑矩阵层5及像素定义层6的上表面设置一彩膜基板7，参照图3。其中，所述彩膜基板为透明的基板，具有良好的透光率。
S8温度检测步骤，对所述载台的温度进行检测处理。需要说明的是，所述载台内具有一温度检测装置，用以检测液晶显示面板的温度变化。当所述液晶显示面板的温度小于或等于50°时，所述黑矩阵层为黑色，当所述液晶显示面板的温度大于或等于60°时，所述黑矩阵层为透明。在50°-60°之间，所述黑矩阵层为渐变过程，即由黑色慢慢地转化为灰色，最后变成透明，本领域的技术人员可以根据所述黑矩阵层的变色状态对所述框胶层进行下一步的光照固化处理。
S9光照固化步骤，对所述框胶层进行光照固化处理。
在所述彩膜基板上放设置灯管200，并利用掩膜板300对所述液晶显示面板进行掩膜处理，参照图3。所述灯管为紫外线灯管(Ultraviolet，UV)，是不可见光，是可见紫色光以外的一段电磁辐射。
本实施例中，当所述温度检测装置检测到所述液晶显示面板的温度小于或等于50°时，所述黑矩阵层为黑色，则可以对所述液晶显示面板继续加热；当所述液晶显示面板的温度大于或等于60°时，所述黑矩阵层呈透明状态，则可以采用所述掩膜板对所述框胶层进行光照固化处理。具体地，所述阵列基板通过热传递的方式从所述框胶层将热量传递到所述黑矩阵层，所述黑矩阵层被升温后，慢慢地从黑色变成透明的状态。当所述液晶显示面板的温度大于或等于 60°时，所述黑矩阵层为完全透明状态，此时，UV光可以透过彩膜基板及透明电极层照射到框胶层上，并对所述框胶层进行光照固化处理，由于所述框胶层没有被任何部件遮挡，可以迅速均匀固化，且将相邻的各膜层紧密地贴合在一起，从而抑制了液晶层的盒厚不均、液晶穿刺的问题发生。需要说明的是，本实施例中，所述彩膜基板及所述透明电极层均透明，且具有良好的透光率，因此UV光可以直接照射到所述框胶层上，并使其充分固化，使得液晶显示面板具有良好的密封性，除了可以抑制液晶显示面板盒厚不均(Mura)、液晶穿刺等问题的发生之外，还可以隔绝水氧，延长液晶显示面板的寿命。
在所述液晶显示面板制备完成之后，所述液晶显示面板被降温至室温状态，所述黑矩阵层由透明变状态回黑色不透光状态，因此，在正常使用该液晶显示面板时，具有良好的遮光性能，可以提高其对比度，并防止不同颜色子像素之间相互混色，也可以被用来阻挡和吸收外界入射的光线，避免光线照射到薄膜晶体管的有源层上，从而保证薄膜晶体管优良的关态特性，还可以遮挡阵列基板上的信号线其他电极线之间的间隙以防止漏光，避免图像对比度的降低。
如图4所示，图4为现有技术液晶显示面板的结构示意图，所述液晶显示面板包括阵列基板11、液晶层12、框胶层13、透明电极层14、黑矩阵层15、像素定义层16以及彩膜基板17。从图中可以看出，黑矩阵层15呈环状设于彩膜基板17上表面，靠近彩膜基板17的边缘处。像素定义层16设于彩膜基板17上表面，且对应彩膜基板17的中部。透明电极层14设于黑矩阵层15及像素定义层16的上表面。液晶层12设于透明电极层14的上表面，且对应像素定义层16。框胶层13呈环状设于透明电极层14的上表面，且对应黑矩阵层15。阵列基板11设于框胶层13及液晶层12上表面。其中，阵列基板11包括衬底基板111以及金属走线层112，金属走线层112设于框胶层13上表面，衬底基板111设于金属走线层112及液晶层12上表面。在对所述框胶层进行光照固化的过程中，UV光对穿过阵列基板后，再对框胶层13进行固化处理，由于阵列基板的金属走线层容易对UV造成遮挡，使得框胶层13固化不完全、不均匀，容易导致液晶显示面板的周边盒厚不均(Mura)、液晶穿刺的等技术问题。
本实施例与现有技术相比，在所述液晶显示面板的制备过程中，当所述液晶显示面板的温度大于或等于60°时，所述黑矩阵层呈完全透明的状态，UV光可以透过透明的彩膜基板及透明电极层照射到框胶层上，且UV光不会被任何部件(金属走线层)遮挡，使得框胶层充分固化且均匀固化。
本实施例提供一种黑矩阵组合物、液晶显示面板及其制备方法，黑矩阵层由黑矩阵组合物制备，该黑矩阵层在温度小于或等于50°时，黑矩阵层为黑色；在温度大于或等于60°时，黑矩阵层为完全透明。因此，在液晶显示面板制备的过程中，液晶显示面板被加热到高温，黑矩阵呈完全透明状态，UV光透过彩膜基板及透明电极层照射到框胶层上，并对所述框胶层进行光照固化处理，而不会被金属走线层遮挡，使得框胶层充分固化且均匀固化，提升液晶显示面板的良率。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上对本申请实施例所提供的一种黑矩阵组合物、液晶显示面板及其制备方法进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：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申请各实施例的技术方案的范围。

Claims (10)

  1. 一种黑矩阵组合物，用于形成黑矩阵层，其中，其各组分及各组分的重量百分比为：
    无机填料，5-10％；
    碱溶性齐聚物，5-10％；
    交联剂，5-10％；
    光聚合引发剂，1％；
    热致变色剂，1-10％；以及
    溶剂，60-85％。
  2. 如权利要求1所述的黑矩阵组合物，其中，
    所述无机填料为炭黑，一炭黑的颗粒大小范围为10-200nm。
  3. 如权利要求1所述的黑矩阵组合物，其中，
    所述碱溶性齐聚物的分子量范围为1000-10000，其结构式选自以下结构式中的至少一种：
    Figure PCTCN2019129031-appb-100001
  4. 如权利要求1所述的黑矩阵组合物，其中，
    所述交联剂的结构式选自以下结构式中的至少一种：
    Figure PCTCN2019129031-appb-100002
  5. 如权利要求1所述的黑矩阵组合物，其中，
    所述光聚合引发剂的结构式选自以下结构式中的至少一种：
    Figure PCTCN2019129031-appb-100003
  6. 如权利要求1所述的黑矩阵组合物，其中，
    所述热致变色剂包括2Cu(CNS)2·2pyridine、偏钒酸铵中的至少一种。
  7. 如权利要求1所述的黑矩阵组合物，其中，
    所述溶剂包括3-乙氧基丙酸乙酯、丙二醇乙醚乙酸酯、丙二醇甲醚乙酸酯、环己酮中的至少一种。
  8. 一种液晶显示面板，包括黑矩阵层，由如权利要求1-7中任一项所述的黑矩阵组合物制成；
    阵列基板；
    液晶层，设于所述阵列基板一侧的表面，且对应所述阵列基板中部；
    框胶层，设于所述阵列基板一侧的表面，且环绕所述液晶层边缘处；
    透明电极层，设于所述液晶层、所述框胶层远离所述阵列基板一侧的表面；以及
    所述黑矩阵层设于所述透明电极层远离所述阵列基板一侧的表面，且对应所述框胶层。
  9. 一种如权利要求8所述的液晶显示面板的制备方法，其中，包括如下步骤：
    阵列基板设置步骤，在一载台上表面设置一阵列基板；
    液晶层制备步骤，在所述阵列基板上表面制备一液晶层，所述液晶层对应所述阵列基板中部；
    框胶层制备步骤，在所述阵列基板上表面制备一框胶层，所述框胶层环绕所述液晶层边缘处；
    透明电极层制备步骤，在所述液晶层及所述框胶层上表面制备一透明电极层；以及
    黑矩阵层制备步骤，在所述透明电极层上表面制备一黑矩阵层，所述黑矩 阵层对应所述框胶层。
  10. 一种如权利要求9所述的液晶显示面板的制备方法，其中，在所述黑矩阵层制备步骤之后还包括：
    温度检测步骤，对所述液晶显示面板的温度进行检测处理；
    光照固化步骤，对所述框胶层进行光照固化处理；
    其中，在所述温度检测步骤，当所述液晶显示面板的温度小于或等于50°时，所述黑矩阵层为黑色，当所述液晶显示面板的温度大于或等于60°时，所述黑矩阵层为透明。
PCT/CN2019/129031 2019-12-18 2019-12-27 黑矩阵组合物、液晶显示面板及其制备方法 WO2021120291A1 (zh)

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