WO2020164182A1 - 聚酰亚胺涂布方法及显示面板的制备方法 - Google Patents

聚酰亚胺涂布方法及显示面板的制备方法 Download PDF

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Publication number
WO2020164182A1
WO2020164182A1 PCT/CN2019/082794 CN2019082794W WO2020164182A1 WO 2020164182 A1 WO2020164182 A1 WO 2020164182A1 CN 2019082794 W CN2019082794 W CN 2019082794W WO 2020164182 A1 WO2020164182 A1 WO 2020164182A1
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WIPO (PCT)
Prior art keywords
nano
protrusions
display panel
glass substrate
pattern relief
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PCT/CN2019/082794
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English (en)
French (fr)
Inventor
沈海洋
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to US16/479,410 priority Critical patent/US11592714B2/en
Publication of WO2020164182A1 publication Critical patent/WO2020164182A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • G02F1/133723—Polyimide, polyamide-imide
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3644—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the metal being silver
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/42—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating of an organic material and at least one non-metal coating
    • 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
    • G02F1/133302—Rigid substrates, e.g. inorganic substrates
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/40—Coatings comprising at least one inhomogeneous layer
    • C03C2217/42—Coatings comprising at least one inhomogeneous layer consisting of particles only
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/70—Properties of coatings
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2218/00—Methods for coating glass
    • C03C2218/10—Deposition methods
    • C03C2218/11—Deposition methods from solutions or suspensions
    • C03C2218/112—Deposition methods from solutions or suspensions by spraying
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2218/00—Methods for coating glass
    • C03C2218/10—Deposition methods
    • C03C2218/11—Deposition methods from solutions or suspensions
    • C03C2218/119—Deposition methods from solutions or suspensions by printing
    • 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
    • G02F2202/02—Materials and properties organic material
    • G02F2202/022—Materials and properties organic material polymeric
    • 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

  • the present invention relates to the field of semiconductor technology, in particular to a polyimide coating method and a preparation method of a display panel.
  • Liquid crystal display device (LCD, Liquid Crystal Display) has many advantages such as thin body, power saving, and no radiation, and has been widely used.
  • Most of the liquid crystal display devices on the existing market are backlight liquid crystal display devices, which include a liquid crystal display panel and a backlight module (backlight module).
  • the working principle of the liquid crystal display panel is to place liquid crystal molecules between two parallel glass substrates, and control the direction of the liquid crystal molecules to change the direction of the liquid crystal molecules through whether the glass substrate is energized or not, and to refract the light from the backlight module to produce images.
  • the LCD panel is composed of color film substrate (CF, Color Filter), thin film transistor (TFT, Thin Film Transistor) substrate, liquid crystal (LC, Liquid Crystal) sandwiched between the color film substrate and the thin film transistor substrate, and a sealant frame (Sealant).
  • the molding process generally includes: the front-end array (Array) process (thin film, yellow light, Etching and peeling), the middle cell process (the TFT substrate is bonded to the CF substrate), and the back module assembly process (the driver IC is pressed against the printed circuit board).
  • the front Array process is mainly to form TFT substrates to control the movement of liquid crystal molecules;
  • the middle Cell process is mainly to add liquid crystal between the TFT substrate and the CF substrate;
  • the back module assembly process is mainly to drive IC pressing and printed circuits
  • the integration of the panel drives the rotation of the liquid crystal molecules to display images.
  • Liquid crystal display panels usually coat polyimide (PI) on thin film transistor substrates and color filter substrates, and form a pretilt angle on the polyimide by rubbing or photo-etching techniques to give liquid crystal molecules Provide a bearing angle.
  • the polyimide coating process in the prior art mainly adopts the following method: uniformly distribute the polyimide liquid on the relief plate (APR plate), and then pass the polyimide liquid through the roller through the relief plate (Roller) It is transferred to the thin film transistor or color filter substrate, while the thin film transistor or color filter substrate moves in the plane to complete the coating of polyimide.
  • the existing PI coating methods are uniform coating methods, and the PI thickness is the same in all places in the effective area. This design will have a serious impact on the array substrate circuit by compressing tension during the static or dynamic bending process.
  • the embodiment of the present invention provides a polyimide coating method and a preparation method of a display panel, which reduce the compressive tension in the static or dynamic bending process of the display panel using the polyimide film, and avoid serious impact on the array substrate circuit , Improve the performance of the prepared display panel.
  • the present application provides a polyimide coating method, which includes:
  • nano material-filled pattern relief Using a predetermined nano material to form a nano material-filled pattern relief on the glass substrate, and a plurality of protrusions are formed on the nano material-filled pattern relief;
  • a polyimide liquid is sprayed on the nano-material-filled pattern relief through the at least one nozzle to form a polyimide film.
  • the predetermined nano material is a nano material that achieves a predetermined light transmittance.
  • the predetermined nano material is nano Ag or graphene.
  • the forming a nano-material filled pattern relief on the glass substrate includes:
  • a preset nano-material filled pattern relief plate is made using a preset nano-material, and the nano-Ag filled pattern relief plate is arranged on the glass substrate.
  • a plurality of protrusions are uniformly arranged on the nano-material-filled pattern relief.
  • the nano-material filled pattern relief is provided with a plurality of protrusions in a predetermined bending area.
  • the plurality of protrusions have the same structure.
  • the protrusions in the plurality of protrusions are triangular protrusions.
  • the protrusions in the plurality of protrusions form peak-shaped protrusions.
  • the at least two nozzles may be arranged closely and flushly in a row, and the arrangement length of the at least two nozzles is equal to the width of the glass substrate. equal.
  • the present application also provides a method for manufacturing a display panel, the method including:
  • nano material-filled pattern relief Using a predetermined nano material to form a nano material-filled pattern relief on the glass substrate, and a plurality of protrusions are formed on the nano material-filled pattern relief;
  • the polyimide film is peeled off from the nano-material filled pattern relief.
  • the predetermined nano material is a nano material that achieves a predetermined light transmittance.
  • the predetermined nano material is nano Ag or graphene.
  • the forming a nano-material filled pattern relief on the glass substrate includes:
  • a preset nano-material filled pattern relief plate is made using a preset nano-material, and the nano-Ag filled pattern relief plate is arranged on the glass substrate.
  • a plurality of protrusions are uniformly arranged on the nano-material-filled pattern relief.
  • the nano-material filled pattern relief is provided with a plurality of protrusions in a predetermined bending area.
  • the plurality of protrusions have the same structure.
  • the protrusions in the plurality of protrusions are triangular protrusions.
  • the protrusions in the plurality of protrusions form peak-shaped protrusions.
  • the at least two nozzles may be arranged closely and flushly in a row, and the arrangement length of the at least two nozzles is equal to the width of the glass substrate. equal.
  • a glass substrate and at least one nozzle are provided; a nano-material-filled pattern relief is formed on the glass substrate, and a plurality of protrusions are formed on the nano-material-filled pattern relief;
  • the nano-material filling pattern relief plate is sprayed with a polyimide liquid to form a polyimide film.
  • the polyimide film has corresponding protrusions by preparing the nano-material filled pattern relief with a number of protrusions. After the subsequent display panel is prepared, the polyimide film has corresponding protrusions. The bulge reduces the compression tension during the static or dynamic bending process of the display panel using the polyimide film, avoids serious impact on the array substrate circuit, and improves the performance of the prepared display panel.
  • FIG. 1 is a schematic flowchart of an embodiment of a polyimide coating method provided by an embodiment of the present invention
  • Fig. 2 is a schematic structural diagram of the embodiment of the nano-material filling the protrusions on the pattern relief in the embodiment of the present invention.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the present invention, “plurality” means two or more than two, unless specifically defined otherwise.
  • the embodiments of the present invention provide a polyimide coating method and a preparation method of a display panel, which will be described in detail below.
  • an embodiment of the present invention provides a polyimide coating method.
  • the method includes: providing a glass substrate and at least one nozzle; forming a nano-material filled pattern relief on the glass substrate, and the nano-material filling pattern A number of protrusions are formed on the relief plate; the at least one nozzle is used to spray polyimide liquid on the nano-material-filled pattern relief plate to form a polyimide film.
  • FIG. 1 it is a schematic flow chart of an embodiment of the polyimide coating method in the embodiment of the present invention, and the method includes:
  • 101 Provide a glass substrate and at least one nozzle.
  • the glass substrate may be a rigid carrier substrate.
  • the number of nozzles in this step can be one or more.
  • the at least two nozzles may be closely and evenly arranged in a row.
  • the arrangement length of the at least two nozzles is equal to the width of the glass substrate.
  • the arrangement length of the at least two nozzles is set to be equal to the width of the glass substrate to ensure that the polyimide liquid can be completely dripped on the glass substrate, avoiding incomplete coating or dripping outside the glass substrate. waste.
  • at least two nozzles are vertically suspended above the glass substrate, and the outer edges of the entire row of nozzles are aligned with the outer edges of the glass substrate to avoid waste due to incomplete coating or dripping outside the glass substrate.
  • the at least one nozzle may be a round tube nozzle or a nozzle of other applicable specifications, which is not specifically limited here.
  • a plurality of protrusions are formed on the relief plate of the nano-material filled pattern.
  • the protrusions on the relief plate of the nano-material-filled pattern are arranged in multiple ways.
  • the plurality of protrusions are uniformly arranged on the relief plate of the nano-material-filled pattern (in this case, the preset The bending area may include at least one of the plurality of protrusions).
  • the plurality of protrusions may be provided only in the preset bending area on the pattern relief filled with nano material, and the preset bending The area can be designed and confirmed in advance.
  • the protrusions on the nano-material-filled pattern relief plate can also be arranged in other ways.
  • the nano-material-filled pattern relief is unevenly provided with the plurality of protrusions, and the nano-material-filled pattern relief is provided with protrusions on both sides (The first situation in Figure 2) and so on.
  • the arrangement of the nano-material filled with a number of protrusions on the pattern relief can ensure that the display panel using the polyimide film can reduce the compression tension during the static or dynamic bending process, which is not specifically limited here.
  • the plurality of protrusions have the same structure.
  • the protrusions in the plurality of protrusions may be the same triangular protrusions, the same peak-shaped protrusions, or the same rectangular protrusions. It is understandable that in the present invention In some other embodiments, the plurality of protrusions may also have different structures, for example, a part is a triangular protrusion, a part is a peak-shaped protrusion, and a part is a rectangular protrusion.
  • the structure of the plurality of protrusions is not specifically implemented in the embodiment of the present invention. limited.
  • Transmittance is a physical term, which means the ability of light to pass through a medium, and is the percentage of the luminous flux through a transparent or translucent body to its incident luminous flux.
  • the light transmittance can indicate the efficiency of light transmission of a display device, etc., and it directly affects the visual effect of the display device.
  • the predetermined nano material in the embodiment of the present invention may be a nano material that achieves the predetermined light transmittance.
  • the preset nano material is a nano material that is easy to peel off after being combined with the polyimide film.
  • the predetermined nano material may be nano Ag or graphene. Since graphene currently has relatively high cost and process requirements, it is preferable that the predetermined nano-material can be nano-Ag.
  • the forming a nano-material-filled pattern relief using a predetermined nano material on the glass substrate includes: making a predetermined nano-material-filled pattern relief using a predetermined nano material, and combining the nano Ag The filled pattern relief is arranged on the glass substrate.
  • a relief printing method can be used to make a preset nano-material filled pattern relief.
  • each of the at least one nozzle may have the same flow rate, which is set according to the thickness of the polyimide film to be coated on the glass substrate, and the at least one nozzle is opened at the same time Or close at the same time to ensure the uniformity of polyimide liquid coating.
  • a flexible base substrate can be formed on the polyimide film, and display elements (including pixel arrays and organic light-emitting structures) and packaging layers can be prepared on the flexible base substrate. Then, mechanical peeling or laser irradiation peeling method is used to peel off the flexible base substrate and the rigid carrier substrate of the prepared display element to obtain a display panel.
  • a glass substrate and at least one nozzle are provided; a nano-material-filled pattern relief is formed on the glass substrate, and a plurality of protrusions are formed on the nano-material-filled pattern relief;
  • the nano-material filling pattern relief plate is sprayed with a polyimide liquid to form a polyimide film.
  • the polyimide film has corresponding protrusions by preparing the nano-material filled pattern relief with a number of protrusions. After the subsequent display panel is prepared, the polyimide film has corresponding protrusions. The bulge reduces the compression tension during the static or dynamic bending process of the display panel using the polyimide film, avoids serious impact on the array substrate circuit, and improves the performance of the prepared display panel.
  • the embodiment of the present invention also provides a method for preparing a display panel, as described above The steps in the polyimide coating method in the polyimide coating method embodiment, and after the polyimide coating method is completed, the polyimide film is peeled from the nano-material filled pattern relief step.
  • laser lift-off technology or mechanical lift-off technology can be used to peel the polyimide film from the nano-material-filled pattern relief, preferably using laser lift-off technology.
  • the performance of the display panel prepared by the method for preparing the display panel is further improved.
  • each of the above units or structures can be implemented as independent entities, or can be combined arbitrarily, and implemented as the same or several entities.
  • each of the above units or structures please refer to the previous method embodiments. No longer.

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Abstract

本发明实施例公开了一种聚酰亚胺涂布方法及显示面板的制备方法。该聚酰亚胺涂布方法包括：提供玻璃基板及至少一个喷嘴；在玻璃基板上形成纳米材料填充图形凸版，该纳米材料填充图形凸版上形成有若干凸起；通过至少一个喷嘴于所述纳米材料填充图形凸版上喷涂聚酰亚胺液，以形成聚酰亚胺薄膜。

Description

聚酰亚胺涂布方法及显示面板的制备方法 技术领域
本发明涉及半导体技术领域，具体涉及一种聚酰亚胺涂布方法及显示面板的制备方法。
 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。现有市场上的液晶显示装置大部分为背光型液晶显示装置，其包括液晶显示面板及背光模组（backlight module）。液晶显示面板的工作原理是在两片平行的玻璃基板当中放置液晶分子，通过玻璃基板通电与否来控制液晶分子改变方向，将背光模组的光线折射出来产生画面。
通常液晶显示面板由彩膜基板（CF，Color Filter）、薄膜晶体管（TFT， Thin Film Transistor) 基板、夹于彩膜基板与薄膜晶体管基板之间的液晶（LC，Liquid Crystal）及密封胶框（Sealant）组成，其成型工艺一般包括：前段阵列（Array）制程（薄膜、黄光、蚀刻及剥膜）、中段成盒（Cell）制程（TFT基板与CF基板贴合）及后段模组组装制程（驱动IC与印刷电路板压合）。其中，前段Array制程主要是形成TFT基板，以便于控制液晶分子的运动；中段Cell制程主要是在TFT基板与CF基板之间添加液晶；后段模组组装制程主要是驱动IC压合与印刷电路板的整合，进而驱动液晶分子转动，显示图像。
液晶显示面板通常会在薄膜晶体管基板及彩膜基板上涂布聚酰亚胺（Polyimide，PI），并在聚酰亚胺上通过摩擦（Rubbing）或光蚀刻技术形成预倾角，从而给液晶分子提供一个承载的角度。现有技术中的聚酰亚胺涂布工艺主要通过以下方式：将聚酰亚胺液均匀地分布在凸版(APR版)上，然后通过凸版把聚酰亚胺液通过辊筒(Roller) 转印到薄膜晶体管或者彩膜基板上，同时薄膜晶体管或者彩膜基板于平面内移动，进而完成聚酰亚胺的涂布。
 技术问题
现有的PI涂布方式均是采用均匀涂布方式，有效区域内所有地方PI厚度是一样的，此种设计在静态或动态折弯过程中压缩张力会对阵列基板线路造成严重的影响。
 技术解决方案
本发明实施例提供一种聚酰亚胺涂布方法及显示面板的制备方法，降低使用聚酰亚胺薄膜的显示面板静态或动态折弯过程中的压缩张力，避免对阵列基板线路造成严重影响，提高制备的显示面板的性能。
为解决上述问题，第一方面，本申请提供一种聚酰亚胺涂布方法，该方法包括：
提供玻璃基板及至少一个喷嘴；
利用预设纳米材料在所述玻璃基板上形成纳米材料填充图形凸版，所述纳米材料填充图形凸版上形成有若干凸起；
通过所述至少一个喷嘴于所述纳米材料填充图形凸版上喷涂聚酰亚胺液，以形成聚酰亚胺薄膜。
在一些实施例中，所述预设纳米材料为达到预设透光率的纳米材料。
在一些实施例中，所述预设纳米材料为纳米Ag或石墨烯。
在一些实施例中，所述在所述玻璃基板上形成纳米材料填充图形凸版，包括：
利用预设纳米材料制作预设纳米材料填充图形凸版，并将所述纳米Ag填充图形凸版设于所述玻璃基板上。
在一些实施例中，所述纳米材料填充图形凸版上均匀设置若干凸起。
在一些实施例中，所述纳米材料填充图形凸版上预设的弯折区域设置若干凸起。
在一些实施例中，所述若干凸起具有相同结构。
在一些实施例中，所述若干凸起中的凸起为三角形凸起。
在一些实施例中，所述若干凸起中的凸起形成峰形凸起。
在一些实施例中，当所述至少一个喷嘴的数量为至少两个时，所述至少两个喷嘴可紧密平齐地排列为一排，所述至少两个喷嘴的排列长度与玻璃基板的宽度相等。
第二方面，本申请还提供一种显示面板的制备方法，该方法包括：
提供玻璃基板及至少一个喷嘴；
利用预设纳米材料在所述玻璃基板上形成纳米材料填充图形凸版，所述纳米材料填充图形凸版上形成有若干凸起；
通过所述至少一个喷嘴于所述纳米材料填充图形凸版上喷涂聚酰亚胺液，以形成聚酰亚胺薄膜；
在完成聚酰亚胺涂布方法之后，将聚酰亚胺薄膜从纳米材料填充图形凸版上剥离出来。
在一些实施例中，所述预设纳米材料为达到预设透光率的纳米材料。
在一些实施例中，所述预设纳米材料为纳米Ag或石墨烯。
在一些实施例中，所述在所述玻璃基板上形成纳米材料填充图形凸版，包括：
利用预设纳米材料制作预设纳米材料填充图形凸版，并将所述纳米Ag填充图形凸版设于所述玻璃基板上。
在一些实施例中，所述纳米材料填充图形凸版上均匀设置若干凸起。
在一些实施例中，所述纳米材料填充图形凸版上预设的弯折区域设置若干凸起。
在一些实施例中，所述若干凸起具有相同结构。
在一些实施例中，所述若干凸起中的凸起为三角形凸起。
在一些实施例中，所述若干凸起中的凸起形成峰形凸起。
在一些实施例中，当所述至少一个喷嘴的数量为至少两个时，所述至少两个喷嘴可紧密平齐地排列为一排，所述至少两个喷嘴的排列长度与玻璃基板的宽度相等。
 有益效果
本发明实施例聚酰亚胺涂布方法中通过提供玻璃基板及至少一个喷嘴；在玻璃基板上形成纳米材料填充图形凸版，该纳米材料填充图形凸版上形成有若干凸起；通过至少一个喷嘴于所述纳米材料填充图形凸版上喷涂聚酰亚胺液，以形成聚酰亚胺薄膜。本发明实施例中由于通过制备具有若干凸起的纳米材料填充图形凸版，使得形成的聚酰亚胺薄膜具有对应的凸起，在后续显示面板制备完成后，由于聚酰亚胺薄膜具有对应的凸起，降低使用聚酰亚胺薄膜的显示面板静态或动态折弯过程中的压缩张力，避免对阵列基板线路造成严重影响，提高制备的显示面板的性能。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的聚酰亚胺涂布方法的一个实施例流程示意图；
图2是本发明实施例中纳米材料填充图形凸版上的凸起的是实施例结构示意图。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明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发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，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，都属于本发明保护的范围。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
本发明实施例中提供一种聚酰亚胺涂布方法及显示面板的制备方法，以下分别进行详细说明。
首先，本发明实施例中提供一种聚酰亚胺涂布方法，所述方法包括：提供玻璃基板及至少一个喷嘴；在所述玻璃基板上形成纳米材料填充图形凸版，所述纳米材料填充图形凸版上形成有若干凸起；通过所述至少一个喷嘴于所述纳米材料填充图形凸版上喷涂聚酰亚胺液，以形成聚酰亚胺薄膜。
如图1所示，为本发明实施例中聚酰亚胺涂布方法的一个实施例流程示意图，该方法包括：
101、提供玻璃基板及至少一个喷嘴。
本发明实施例中，该玻璃基板可以为硬质载体基板。
在本步骤中的喷嘴的数量可为一个或多个。当所述至少一个喷嘴的数量为至少两个时，所述至少两个喷嘴可紧密平齐地排列为一排。较佳的，所述至少两个喷嘴的排列长度与玻璃基板的宽度相等。本步骤中，通过设置所述至少两个喷嘴的排列长度等于玻璃基板的宽度，以保证聚酰亚胺液能完全滴落于玻璃基板上，避免涂布不全或滴落于玻璃基板外而造成浪费。在本步骤中，至少两个喷嘴垂直悬置于玻璃基板的上方，整排喷嘴的外侧边缘与玻璃基板的外侧边缘对齐，避免涂布不全或滴落于玻璃基板外而造成浪费。
另外，本发明实施例中，所述至少一个喷嘴可采用圆管型喷嘴或其他适用规格的喷嘴，具体此处不作限定。
102、利用预设纳米材料在玻璃基板上形成纳米材料填充图形凸版。
其中，所述纳米材料填充图形凸版上形成有若干凸起。具体的，纳米材料填充图形凸版上的凸起设置有多种方式，在本发明一些实施例中，该纳米材料填充图形凸版上均匀设置所述若干凸起（此种情况下，该预设的弯折区域可以包括所述若干凸起中至少一个），在本发明另一些实施例中，可以仅纳米材料填充图形凸版上预设的弯折区域设置所述若干凸起，预设的弯折区域可以预先进行设计确认。可以理解的是，纳米材料填充图形凸版上的凸起设置还可以有其他方式，例如，纳米材料填充图形凸版上不均匀设置所述若干凸起、该纳米材料填充图形凸版上两侧设置凸起（如图2中第一种情况）等。该纳米材料填充图形凸版上的若干凸起的设置，能保证使用聚酰亚胺薄膜的显示面板能降低静态或动态折弯过程中的压缩张力即可，此处不作具体限定。
在本发明一些实施例中，所述若干凸起具有相同结构。如图2所示，所述若干凸起中的凸起可以是相同的三角形凸起，也可以是相同的峰形凸起，还可以是相同的矩形凸起，可以理解的是，在本发明其他一些实施例中，所述若干凸起也可以是不同结构，例如一部分为三角形凸起，一部分为峰形凸起，一部分为矩形凸起，该若干凸起的结构本发明实施例中具体不作限定。
透光率是一个物理词汇，是表示光线透过介质的能力，是透过透明或半透明体的光通量与其入射光通量的百分率。透光率可以表示显示设备等的透过光的效率，它直接影响到显示设备的视觉效果。
为了保证后续制备的显示面板的透光率，进一步的，本发明实施例中所述预设纳米材料可以为达到预设透光率的纳米材料。为了保证制备后的显示面板与纳米材料剥离，所述预设纳米材料为与聚酰亚胺薄膜结合后易剥离的纳米材料。具体的，所述预设纳米材料可以为纳米Ag或石墨烯。由于石墨烯目前成本和工艺上要求比较高，因此优选预设纳米材料可以为纳米Ag。
在本发明一些实施例中，所述利用预设纳米材料在所述玻璃基板上形成纳米材料填充图形凸版，包括：利用预设纳米材料制作预设纳米材料填充图形凸版，并将所述纳米Ag填充图形凸版设于所述玻璃基板上。具体的，可以利用凸版印刷方法制作预设纳米材料填充图形凸版。
103、通过至少一个喷嘴于纳米材料填充图形凸版上喷涂聚酰亚胺液，以形成聚酰亚胺薄膜。
在本发明一些实施例中，所述至少一个喷嘴中每个喷嘴可以具有相同的流量，该流量大小依据玻璃基板所需涂布的聚酰亚胺薄膜的厚度设定，该至少一个喷嘴同时打开或同时关闭，以保证聚酰亚胺液涂布的均匀性。
本发明实施例中，在形成聚酰亚胺薄膜之后，可以在聚酰亚胺薄膜上形成柔性衬底基板，在柔性衬底基板上制备显示元件(包括像素阵列和有机发光结构)和封装层，之后再采用机械剥离或激光照射剥离方法将制备好的显示元件的柔性衬底基板和硬质载体基板剥离，可以得到显示面板。
本发明实施例聚酰亚胺涂布方法中通过提供玻璃基板及至少一个喷嘴；在玻璃基板上形成纳米材料填充图形凸版，该纳米材料填充图形凸版上形成有若干凸起；通过至少一个喷嘴于所述纳米材料填充图形凸版上喷涂聚酰亚胺液，以形成聚酰亚胺薄膜。本发明实施例中由于通过制备具有若干凸起的纳米材料填充图形凸版，使得形成的聚酰亚胺薄膜具有对应的凸起，在后续显示面板制备完成后，由于聚酰亚胺薄膜具有对应的凸起，降低使用聚酰亚胺薄膜的显示面板静态或动态折弯过程中的压缩张力，避免对阵列基板线路造成严重影响，提高制备的显示面板的性能。
为了更好实施本发明实施例中聚酰亚胺涂布方法，在聚酰亚胺涂布方法基础之上，本发明实施例中还提供一种显示面板的制备方法，如上述任一所述聚酰亚胺涂布方法实施例中的聚酰亚胺涂布方法中的步骤，以及在完成聚酰亚胺涂布方法之后，将聚酰亚胺薄膜从纳米材料填充图形凸版上剥离出来的步骤。
其中，将聚酰亚胺薄膜从纳米材料填充图形凸版上剥离出来可以利用激光剥离技术或者机械剥离技术，优选采用激光剥离技术。
通过采用如上实施例中描述的聚酰亚胺涂布方法，进一步提升了该显示面板的制备方法制备的显示面板的性能。
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，可以参见上文针对其他实施例的详细描述，此处不再赘述。
具体实施时，以上各个单元或结构可以作为独立的实体来实现，也可以进行任意组合，作为同一或若干个实体来实现，以上各个单元或结构的具体实施可参见前面的方法实施例，在此不再赘述。
以上对本发明实施例所提供的一种聚酰亚胺涂布方法及显示面板的制备方法进行了详细介绍，本文中应用了具体个例对本发明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发明的方法及其核心思想；同时，对于本领域的技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。

Claims (20)

  1. 一种聚酰亚胺涂布方法，其中，所述方法包括：
    提供玻璃基板及至少一个喷嘴；
    利用预设纳米材料在所述玻璃基板上形成纳米材料填充图形凸版，所述纳米材料填充图形凸版上形成有若干凸起；
    通过所述至少一个喷嘴于所述纳米材料填充图形凸版上喷涂聚酰亚胺液，以形成聚酰亚胺薄膜。
  2. 根据权利要求1所述的聚酰亚胺涂布方法，其中，所述预设纳米材料为达到预设透光率的纳米材料。
  3. 根据权利要求2所述的聚酰亚胺涂布方法，其中，所述预设纳米材料为纳米Ag或石墨烯。
  4. 根据权利要求1所述的聚酰亚胺涂布方法，其中，所述利用预设纳米材料在所述玻璃基板上形成纳米材料填充图形凸版，包括：
    利用预设纳米材料制作预设纳米材料填充图形凸版，并将所述纳米Ag填充图形凸版设于所述玻璃基板上。
  5. 根据权利要求1所述的聚酰亚胺涂布方法，其中，所述纳米材料填充图形凸版上均匀设置所述若干凸起。
  6. 根据权利要求1所述的聚酰亚胺涂布方法，其中，所述纳米材料填充图形凸版上预设的弯折区域设置所述若干凸起。
  7. 根据权利要求1所述的聚酰亚胺涂布方法，其中，所述若干凸起具有相同结构。
  8. 根据权利要求7所述的聚酰亚胺涂布方法，其中，所述若干凸起中的凸起为三角形凸起。
  9. 根据权利要求7所述的聚酰亚胺涂布方法，其中，所述若干凸起中的凸起为峰形凸起。
  10. 根据权利要求1所述的聚酰亚胺涂布方法，其中，当所述至少一个喷嘴的数量为至少两个时，所述至少两个喷嘴可紧密平齐地排列为一排，所述至少两个喷嘴的排列长度与玻璃基板的宽度相等。
  11. 一种显示面板的制备方法，其中，包括：
    提供玻璃基板及至少一个喷嘴；
    利用预设纳米材料在所述玻璃基板上形成纳米材料填充图形凸版，所述纳米材料填充图形凸版上形成有若干凸起；
    通过所述至少一个喷嘴于所述纳米材料填充图形凸版上喷涂聚酰亚胺液，以形成聚酰亚胺薄膜；
    在完成聚酰亚胺涂布方法之后，将聚酰亚胺薄膜从纳米材料填充图形凸版上剥离出来。
  12. 根据权利要求11所述的显示面板的制备方法，其中，所述预设纳米材料为达到预设透光率的纳米材料。
  13. 根据权利要求12所述的显示面板的制备方法，其中，所述预设纳米材料为纳米Ag或石墨烯。
  14. 根据权利要求11所述的显示面板的制备方法，其中，所述利用预设纳米材料在所述玻璃基板上形成纳米材料填充图形凸版，包括：
    利用预设纳米材料制作预设纳米材料填充图形凸版，并将所述纳米Ag填充图形凸版设于所述玻璃基板上。
  15. 根据权利要求11所述的显示面板的制备方法，其中，所述纳米材料填充图形凸版上均匀设置所述若干凸起。
  16. 根据权利要求11所述的显示面板的制备方法，其中，所述纳米材料填充图形凸版上预设的弯折区域设置所述若干凸起。
  17. 根据权利要求11所述的显示面板的制备方法，其中，所述若干凸起具有相同结构。
  18. 根据权利要求17所述的显示面板的制备方法，其中，所述若干凸起中的凸起为三角形凸起。
  19. 根据权利要求17所述的显示面板的制备方法，其中，所述若干凸起中的凸起为峰形凸起。
  20. 根据权利要求11所述的显示面板的制备方法，其中，当所述至少一个喷嘴的数量为至少两个时，所述至少两个喷嘴可紧密平齐地排列为一排，所述至少两个喷嘴的排列长度与玻璃基板的宽度相等。
PCT/CN2019/082794 2019-02-13 2019-04-16 聚酰亚胺涂布方法及显示面板的制备方法 Ceased WO2020164182A1 (zh)

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