WO2016123817A1 - 液晶面板的配向膜制作方法 - Google Patents

液晶面板的配向膜制作方法 Download PDF

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Publication number
WO2016123817A1
WO2016123817A1 PCT/CN2015/072837 CN2015072837W WO2016123817A1 WO 2016123817 A1 WO2016123817 A1 WO 2016123817A1 CN 2015072837 W CN2015072837 W CN 2015072837W WO 2016123817 A1 WO2016123817 A1 WO 2016123817A1
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WIPO (PCT)
Prior art keywords
liquid crystal
reaction
substrate
alignment film
machine
Prior art date
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Ceased
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PCT/CN2015/072837
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English (en)
French (fr)
Inventor
赵仁堂
宋彦君
谢忠憬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to EA201791774A priority Critical patent/EA033938B1/ru
Priority to US14/648,708 priority patent/US9563079B2/en
Priority to KR1020177021919A priority patent/KR102001551B1/ko
Priority to GB1712777.0A priority patent/GB2550761B/en
Priority to JP2017541354A priority patent/JP6464275B2/ja
Publication of WO2016123817A1 publication Critical patent/WO2016123817A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02F1/1337—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
    • 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
    • G02F1/133354—Arrangements for aligning or assembling 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
    • 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
    • G02F1/133715—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films by first depositing a monomer
    • 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
    • G02F1/133726—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films made of a mesogenic material
    • 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
    • G02F1/133788—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 by light irradiation, e.g. linearly polarised light photo-polymerisation
    • 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
    • G02F1/1341—Filling or closing of cells
    • 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
    • G02F1/1303—Apparatus specially adapted to the manufacture of LCDs

Definitions

  • the present invention relates to the field of liquid crystal production technology, and in particular, to a method for fabricating an alignment film of a liquid crystal panel.
  • MVA mode is through liquid crystal alignment monomer (Reactive Monomer, RM) During the curing process, a protrusion is formed on the inner surface of the substrate, and the protrusion is at a predetermined angle to form an alignment film, so that the liquid crystal is biased to a certain angle and then is stationary.
  • RM reactive Monomer
  • FIG. 1A and FIG. 1B it is a schematic diagram of a process of forming an alignment film.
  • 1A shows a first reaction machine, which supplies a voltage V, a first ultraviolet (UV1) light tube illumination and heating, and causes the liquid crystal alignment unit 14 to start reacting to start moving toward the first substrate 11 or the second substrate.
  • the convex film is formed to form the alignment film 13 to deflect the liquid crystal molecules 12.
  • UV1 illumination is completed, the voltage is stopped, and the substrate is subsequently irradiated with the second ultraviolet light (UV2).
  • UV2 the second ultraviolet light
  • FIG. 1B only UV2 is provided and is weaker than the first UV1 light, so that the remaining RM14 is left.
  • the reaction is complete.
  • one UV1 machine can only expose one substrate at a time, which makes this step become a bottleneck of production capacity, which affects the production efficiency of the alignment film.
  • the present invention provides a method for fabricating an alignment film of a liquid crystal panel, which solves the problem that the prior art takes a long time in the first reaction machine to form a capacity bottleneck.
  • a method for fabricating an alignment film of a liquid crystal panel comprising the steps of:
  • the liquid crystal cell into the first reaction machine to receive the voltage supplied by the first reaction machine, ultraviolet irradiation, and temperature to cause polymerization of the liquid crystal alignment monomer, wherein the first reaction machine
  • the voltage supplied by the stage is 7V ⁇ 50V
  • the illuminance of ultraviolet irradiation is 0.05 ⁇ 120 mW/cm2
  • the temperature is 25°C ⁇ 80°C; whether the time of the liquid crystal cell in the first reaction machine reaches the first a preset time;
  • the liquid crystal cell moves the liquid crystal cell from the first reaction machine to the second reaction machine to receive the voltage and temperature provided by the second reaction machine, so that The liquid crystal alignment monomer continues to undergo polymerization, wherein the second reaction machine provides a voltage of 1V to 50V, and a temperature of 10 ° C to 100 ° C;
  • the liquid crystal cell is removed from the second reaction stage to form an alignment film on the inner surfaces of the first substrate and the second substrate, respectively.
  • the second reaction station includes a conveyor belt for conveying the liquid crystal cell from the inlet of the second reaction stage to the outlet, and the polymerization reaction is completed in the second reaction stage.
  • the length of the conveyor belt ranges from 10 to 100 meters.
  • the second reaction machine is a multi-layer furnace structure, and the number of layers in the furnace body is 10 to 100 layers.
  • the method before the step of injecting the liquid crystal mixture between the first substrate and the second substrate, the method further comprises the steps of:
  • the liquid crystal mixture is prepared, wherein a ratio of the liquid crystal alignment monomer in the liquid crystal mixture is 2000 to 5000 PPM.
  • the liquid crystal alignment monomer is aromatic.
  • the method further includes:
  • the step of polymerizing the liquid crystal alignment monomer further comprises:
  • the liquid crystal alignment monomer moves toward the first substrate or the second substrate and forms a protrusion
  • the liquid crystal molecules form a pretilt angle under the action of the protrusions.
  • the embodiment of the present invention provides the following technical solutions:
  • a method for fabricating an alignment film of a liquid crystal panel comprising the steps of:
  • liquid crystal cell into the first reaction machine to receive the voltage supplied by the first reaction machine, ultraviolet irradiation, and temperature, so that the liquid crystal alignment monomer is polymerized;
  • the second reaction machine comprises a conveyor belt for conveying the liquid crystal cell from the inlet of the second reaction machine to the outlet, and the liquid crystal alignment monomer completes the polymerization in the second reaction machine stage reaction.
  • the length of the conveyor belt ranges from 10 to 100 meters.
  • the second reaction machine is a multi-layer furnace structure, and the number of layers in the furnace body is 10 to 100 layers.
  • the method further includes the steps of: determining whether the time of the liquid crystal cell in the second reaction machine reaches a second preset time;
  • the liquid crystal cell is removed from the second reaction stage.
  • the first reaction machine provides a voltage of 7 to 50 V, an ultraviolet irradiation illumination of 0.05 to 120 mW/cm 2 , and a temperature of 25 to 80 ° C;
  • the second reaction machine provides a voltage of 1V to 50V and a temperature of 10 ° C to 100 ° C.
  • the method further comprises the step of: preparing the liquid crystal mixture, wherein a ratio of the liquid crystal alignment monomer in the liquid crystal mixture is 2000 to 5000 PPM.
  • the liquid crystal alignment monomer is aromatic.
  • the method further includes:
  • the step of polymerizing the liquid crystal alignment monomer further comprises: moving the liquid crystal alignment monomer to the first substrate or the second substrate and forming a protrusion;
  • the liquid crystal molecules form a pretilt angle under the action of the protrusions.
  • the present invention provides a polymerization reaction condition for the liquid crystal cell through the second reaction machine, shortens the reaction time in the first reaction machine, avoids the bottleneck of the production capacity, and further shortens the preparation time.
  • 1A is a schematic view showing a process of forming an alignment film in a first reaction stage in the background art
  • 1B is a schematic view showing a process of forming an alignment film in a second reaction machine in the background art
  • FIG. 2 is a schematic flow chart of a method for fabricating an alignment film according to Embodiment 1 of the present invention
  • 3A is a schematic diagram of simulation of a second reaction machine according to Embodiment 1 of the present invention.
  • 3B is a schematic view showing a process of forming the prepared alignment film of FIG. 3A;
  • FIG. 4 is a schematic flow chart of a method for fabricating an alignment film according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of simulation of a second reaction machine according to Embodiment 2 of the present invention.
  • FIG. 2 is a schematic flow chart of a method for fabricating an alignment film of a liquid crystal panel according to an example of the present invention.
  • step S201 a liquid crystal mixture containing liquid crystal molecules and liquid crystal alignment monomers is prepared.
  • liquid crystal alignment monomer includes an aromatic group.
  • the ratio of the liquid crystal alignment monomer in the liquid crystal mixture is 2000 to 5000 PPM (parts per million), and the optimal alignment effect can be achieved after the polymerization reaction is completed.
  • step S202 a liquid crystal mixture is injected between the first substrate and the second substrate, and is subjected to labeling to form a liquid crystal cell.
  • the method further includes: disposing the first substrate and the second substrate by a predetermined distance to a voltage contact point exposing the second substrate, And a method for receiving a voltage provided by the first reaction machine or the second reaction machine.
  • step S203 the liquid crystal cell is placed in the first reaction machine to receive the voltage supplied by the first reaction machine, ultraviolet radiation, and temperature to cause polymerization of the liquid crystal alignment monomer.
  • the first reaction machine provides a voltage of 7 to 50 V, an ultraviolet illuminance of 0.05 to 120 mW/cm 2 , and a temperature of 25 to 80 ° C.
  • the voltage provided by the first reaction machine is transmitted by connecting the voltage contact points.
  • the reaction process in the background art is similar, except that the reaction time is shortened.
  • the liquid crystal alignment monomer in the liquid crystal cell starts to undergo polymerization, and a protrusion is formed on the first substrate or the second substrate.
  • step S204 it is determined whether the time of the liquid crystal cell in the first reaction machine reaches a first preset time.
  • the first preset time is set based on the ratio of the polymerization reaction of the liquid crystal alignment monomer to a predetermined value range under current conditions, such as 65-80%, 60-70%, or 75-90. %, no longer enumerated here. Taking 65-80% as an example, under the current reaction conditions, the corresponding reaction time is 50 seconds.
  • step S205 if the first preset time is reached, the liquid crystal cell is moved from the first reaction machine to the second reaction machine to receive the voltage provided by the second reaction machine. And a temperature, the liquid crystal alignment monomer continues to undergo a polymerization reaction, and an alignment film is formed on the inner surfaces of the first substrate and the second substrate, respectively.
  • the second preset range includes: the voltage provided by the second reaction machine is 1V ⁇ 50V, and the temperature is 10°C ⁇ 100°C. Wherein, the voltage provided by the second reaction machine is transmitted by connecting the voltage contact points.
  • the second reaction machine table 31 is a novel second reaction machine platform, which is a multi-layer furnace structure, and the number of layers in the furnace body can be set to 10 to 100 layers, which is more convenient for accommodating liquid crystal from the first reaction machine table. box.
  • FIG. 3B a schematic diagram of the formation process of the alignment film in any of the layers of FIG. 3A.
  • the liquid crystal alignment monomer 14 continues to undergo polymerization, and an alignment film is formed to cause the liquid crystal molecules 12 to form a pretilt angle.
  • step S206 it is determined whether the time of the liquid crystal cell in the second reaction machine reaches a second preset time.
  • step S207 if the second preset time is reached, the liquid crystal cell is removed from the second reaction machine.
  • liquid crystal alignment monomer When the liquid crystal alignment monomer is polymerized, it moves to the first substrate or the second substrate and forms a protrusion; the liquid crystal molecules form a pretilt angle under the action of the protrusion.
  • the first reaction machine needs to provide ultraviolet radiation, and the temperature and voltage are combined to start the liquid crystal alignment monomer to start the polymerization reaction to form a pretilt angle. Therefore, the requirements for ultraviolet illuminance are more severe, and the cost should be higher. High precision instrument.
  • the second reaction machine only needs temperature and voltage to maintain the polymerization reaction to continue, avoiding the problem of panel lighting caused by the free liquid crystal alignment monomer, and the step is to use general equipment, and the cost is low.
  • the invention reduces the time in the first reaction machine by designing the second reaction machine, and the capacity of the second reaction machine is large, and the unit production time is very low, so that although a production step is added, The actual unit production time has been reduced.
  • the first reaction machine is prevented from becoming the alignment film of the liquid crystal panel, which becomes a capacity bottleneck, and the overall preparation efficiency of the liquid crystal panel is improved.
  • FIG. 4 is a schematic flow chart of a method for fabricating an alignment film of a liquid crystal panel according to an example of the present invention.
  • the difference from the manufacturing method of the first embodiment is that there are no steps S206 and S207 in the first embodiment, and the step S406 is added instead.
  • step S406 the liquid crystal cell is moved in the second reaction stage at a predetermined speed.
  • FIG. 5 is a schematic diagram of the simulation of the second reaction machine.
  • the first reaction machine is the same as the first embodiment.
  • the configuration of the second reaction machine is different, that is: the second reaction machine comprises a conveyor belt for conveying the liquid crystal cell from the inlet of the second reaction machine to the outlet, and in the second
  • the liquid crystal alignment monomer 14 in the reaction stage completes the polymerization reaction, and causes the liquid crystal molecules 12 to generate a sufficient pretilt angle, and the liquid crystal alignment monomer having no free state exists.
  • the length of the conveyor belt ranges from 10 meters to 100 meters.
  • the length of the conveyor belt and the predetermined speed are set in order to bring the reaction time of the liquid crystal cell in the second reaction machine to a second preset time of the first embodiment.
  • the first reaction machine needs to provide ultraviolet irradiation, and the temperature and voltage are combined to start the liquid crystal alignment monomer to start the polymerization reaction. Therefore, the requirements for ultraviolet illuminance are more severe, and a high-precision high-precision instrument should be used. .
  • the second reaction machine only needs temperature and voltage to maintain the polymerization reaction to continue, and the general equipment can be used, and the cost is low.
  • the invention reduces the time in the first reaction machine by designing the second reaction machine, and the capacity of the second reaction machine is large, and it is also a part of the conveying mechanism, fully utilizing the function of the previous conveying mechanism In a single case, this makes the production time of the unit very low.
  • the first reaction machine is prevented from becoming the alignment film of the liquid crystal panel, which becomes a capacity bottleneck, and the overall preparation efficiency of the liquid crystal panel is improved.
  • the present invention provides a new second reaction machine design and a corresponding alignment film fabrication method. It will be understood that other embodiments derived from the above two embodiments, using temperature and voltage instead of ultraviolet radiation, are within the spirit of the invention.
  • Table 1 is a schematic diagram showing the verification results of the second reaction machine and the corresponding alignment film manufacturing method designed according to the embodiment of the present invention.
  • UV1 ultraviolet light
  • the temperature test was performed without maintaining the voltage and the sustain voltage, and the temperature of the second stage was 50 °C. It can be seen from the results that when the UV1 time is the same, if no voltage is applied after the end of UV1, the substrate remains on the second machine at 50 ° C for 15 min, and the pre-tilt is not retained in the second machine. The same for the station. It indicates that the pretilt angle cannot be formed without applying voltage.
  • the UV1 time was shortened to 165s and 145s respectively. After the end of UV1, the voltage was kept constant. When the substrate was retained for 15 min and 30 min on the second machine at 50 ° C, a pretilt angle larger than that when the UV 1 time was not shortened was obtained. .
  • the same pretilt angle can be obtained by replacing the effect of part of UV1 by the action of the temperature at an appropriate time.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
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  • Liquid Crystal (AREA)

Abstract

一种液晶面板的配向膜制作方法，包括：注入包含液晶分子和液晶配向单体的液晶混合物以形成液晶盒；将液晶盒放入第一反应机台中，以接收电压、紫外线照射和温度，使液晶配向单体发生聚合反应；第一预设时间后将液晶盒移至第二反应机台，以接收电压和温度，继续发生聚合反应，并在第一基板与第二基板的内表面分别形成配向膜。

Description

液晶面板的配向膜制作方法 技术领域
本发明涉及液晶生产技术领域，特别涉及一种液晶面板的配向膜制作方法。
 背景技术
为了满足液晶面板的大尺寸、广视角的发展需求，多象限垂直配向（Multi-Domain Vertical Alignment，MVA）模式受到了液晶面板制造商的广泛关注。MVA模式是通过液晶配向单体（Reactive Monomer，RM）在固化过程中，在基板内表面形成凸起物，凸起物呈预设角度进而形成配向膜，使得液晶偏向某一角度后静止。MVA模式具有视角广、成像品质高等优点。
如图1A与图1B所示，为在配向膜形成的过程示意图。图1A所示为第一反应机台，提供电压V、第一紫外线（UV1）光灯管照度及加热，使液晶配向单体14开始发生反应，向第一基板11或第二基板开始移动，呈凸起状以形成配向膜13，使液晶分子12发生偏转。通常UV1照光完成即停止加电压，且基板紧接着进行第二紫外线光（UV2）照射，如图1B所示的第二反应机台中，仅提供UV2且比第一UV1光偏弱，使剩余RM14反应完全。整个过程中由于一台UV1机台一次只能对一片基板进行曝光，使这一步骤成为产能的瓶颈，影响了配向膜的制作效率。
 技术问题
有鉴于此，本发明提供一种液晶面板的配向膜制作方法，以解决现有技术中在第一反应机台内耗时长以致形成产能瓶颈的问题。
 技术解决方案
一种液晶面板的配向膜制作方法，包括以下步骤：
在第一基板与第二基板之间注入液晶混合物，并进行贴盒，以形成液晶盒，所述液晶混合物包含液晶分子和液晶配向单体；
将所述液晶盒放入第一反应机台中，以接收所述第一反应机台所提供电压、紫外线照射、以及温度，使所述液晶配向单体发生聚合反应，其中，所述第一反应机台提供的电压为7V~50V、紫外线照射的照度为0.05~120毫瓦/平方厘米、以及温度为25℃~80℃；判断所述液晶盒在所述第一反应机台中的时间是否达到第一预设时间；
Figure TP150010PCT-appb-I000001
如果达到所述第一预设时间，则将所述液晶盒从所述第一反应机台移至第二反应机台中，以接收所述第二反应机台所提供电压、以及温度，使所述液晶配向单体继续发生聚合反应，其中，所述第二反应机台提供的电压为1V~50V、以及温度为10℃~100℃；
判断所述液晶盒在所述第二反应机台中的时间是否达到第二预设时间；以及
Figure TP150010PCT-appb-I000001
如果达到第二预设时间，则将所述液晶盒从所述第二反应机台中移出使所述第一基板与所述第二基板的内表面分别形成配向膜。
Figure TP150010PCT-appb-I000001
优选地，所述第二反应机台包括传送带，用于将所述液晶盒从第二反应机台的入口传送至出口，并在所述第二反应机台内完成所述聚合反应。
优选地，传送带的长度范围为10~100米。
Figure TP150010PCT-appb-I000001
优选地，所述第二反应机台为多层炉结构，炉体内的层数为10~100层。
Figure TP150010PCT-appb-I000001
优选地，所述在第一基板与第二基板之间注入液晶混合物的步骤之前，还包括步骤：
制备所述液晶混合物，其中所述液晶配向单体在所述液晶混合物中的比例为2000~5000PPM。
优选地，所述液晶配向单体为芳香族。
Figure TP150010PCT-appb-I000001
优选地，在所述进行贴盒的步骤中，还包括：
Figure TP150010PCT-appb-I000001
Figure TP150010PCT-appb-I000001
将所述第一基板与第二基板错开一预定距离，至裸露所述第二基板的电压接触点，用于接收所述第一反应机台或第二反应机台所提供的电压。
优选地，所述液晶配向单体发生聚合反应后的步骤还包括：
所述液晶配向单体向第一基板或第二基板移动并形成凸起物；
所述液晶分子在所述凸起物的作用下形成预倾角。
为解决上述技术问题，本发明实施例提供以下技术方案：
Figure TP150010PCT-appb-I000001
一种液晶面板的配向膜制作方法，包括以下步骤：
在第一基板与第二基板之间注入液晶混合物，并进行贴盒，以形成液晶盒，所述液晶混合物包含液晶分子和液晶配向单体；
将所述液晶盒放入第一反应机台中，以接收所述第一反应机台所提供电压、紫外线照射、以及温度，使所述液晶配向单体发生聚合反应；
判断所述液晶盒在所述第一反应机台中的时间是否达到第一预设时间；
Figure TP150010PCT-appb-I000001
如果达到第一预设时间，则将所述液晶盒从所述第一反应机台移至所述第二反应机台中，以接收所述第二反应机台所提供电压、以及温度，使所述液晶配向单体继续发生聚合反应，并在所述第一基板与所述第二基板的内表面分别形成配向膜。
优选地，所述第二反应机台包括传送带，用于将所述液晶盒从第二反应机台的入口传送至出口，并在第二反应机台内所述液晶配向单体完成所述聚合反应。
优选地，传送带的长度范围为10~100米。
优选地，所述第二反应机台为多层炉结构，炉体内的层数为10~100层。
优选地，还包括如下步骤：判断所述液晶盒在所述第二反应机台中的时间是否达到第二预设时间；以及
如果达到第二预设时间，则将所述液晶盒从所述第二反应机台中移出。
优选地，第一反应机台提供的电压为7~50V、紫外线照射的照度为0.05~120毫瓦/平方厘米、以及温度为25℃~80℃；
所述第二反应机台提供的电压为1V~50V、以及温度为10℃~100℃。
优选地，还包括步骤：制备所述液晶混合物，其中所述液晶配向单体在所述液晶混合物中的比例为2000~5000PPM。
优选地，所述液晶配向单体为芳香族。
优选地，在所述进行贴盒的步骤中，还包括：
将所述第一基板与第二基板错开一预定距离，至裸露所述第二基板的电压接触点，用于接收所述第一反应机台或第二反应机台所提供的电压。
优选地，所述液晶配向单体发生聚合反应后的步骤还包括：所述液晶配向单体向第一基板或第二基板移动并形成凸起物；
所述液晶分子在所述凸起物的作用下形成预倾角。
 有益效果
相对于现有技术，本发明通过第二反应机台为液晶盒提供聚合反应的条件，缩短了在第一反应机台中的反应时间，避免了产能的瓶颈，进而缩短了制备时间。
 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面对实施例中所需要使用的附图作简单的介绍，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，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获取其他的附图。
图1A为背景技术中配向膜在第一反应机台中形成过程示意图；
图1B为背景技术中配向膜在第二反应机台中形成过程示意图；
图2为本发明实施例一提供的配向膜制作方法的流程示意图；
图3A为本发明实施例一提供的第二反应机台的模拟示意图；
图3B为图3A中的制备的配向膜的形成过程示意图；
图4为本发明实施例二提供的配向膜制作方法流程示意图；
图5为本发明实施例二提供的第二反应机台的模拟示意图。
 本发明的最佳实施方式
请参照附图中的图式，其中相同的组件符号代表相同的组件。以下的说明是基于所例示的本发明具体实施例，其不应被视为限制本发明未在此详述的其它具体实施例。
Figure TP150010PCT-appb-I000001
实施例一
请参阅图2所示，为本发明实例中液晶面板的配向膜制作方法的流程示意图。
在步骤S201中，制备液晶混合物，所述液晶混合物包含液晶分子和液晶配向单体。
Figure TP150010PCT-appb-I000001
可以理解的是：所述液晶配向单体包括芳香族。所述液晶配向单体在所述液晶混合物中的比例为2000~5000PPM(百万分之一)，在完成聚合反应后，可以达到最佳配向效果。
Figure TP150010PCT-appb-I000001
在步骤S202中，在第一基板与第二基板之间注入液晶混合物，并进行贴盒，以形成液晶盒。
可以理解的是，在第一基板与第二基板进行贴盒的过程中，还包括：将所述第一基板与第二基板错开一预定距离，至裸露所述第二基板的电压接触点，用于接收所述第一反应机台或第二反应机台所提供的电压。
在步骤S203中，将所述液晶盒放入第一反应机台中，以接受所述第一反应机台所提供电压、紫外线照射、以及温度，使所述液晶配向单体发生聚合反应。
Figure TP150010PCT-appb-I000001
可以理解的是，第一反应机台提供的电压为7~50V、紫外线的照度为0.05~120毫瓦/平方厘米、以及温度为25℃~80℃。
其中，第一反应机台提供的电压，通过连接上述电压接触点进行传输。
请参阅图1A所示，在本步骤中与背景技术中的反应过程相似，不同之处仅在于，反应时间缩短。在第一反应机台内，所述液晶盒中的液晶配向单体开始进行聚合反应，并在第一基板或第二基板上形成凸起。
Figure TP150010PCT-appb-I000001
在步骤S204中，判断所述液晶盒在所述第一反应机台中的时间是否达到第一预设时间。
可以理解的是：第一预设时间的设定，是基于在当前条件下，液晶配向单体发生聚合反应的比例达到预定值范围，如65~80%、60~70%、或75~90%，此处不再枚举。以65~80%为例，在当前的反应条件下，其对应的反应时间为50秒。
Figure TP150010PCT-appb-I000001
在步骤S205中，如果达到所述第一预设时间，则将所述液晶盒从所述第一反应机台移至所述第二反应机台中，以接收所述第二反应机台所提供电压、以及温度，使所述液晶配向单体继续发生聚合反应，并在所述第一基板与所述第二基板的内表面分别形成配向膜。
所述第二预设范围包括：第二反应机台提供的电压为1V~50V、以及温度为10℃~100℃。其中，第二反应机台提供的电压，通过连接上述电压接触点进行传输。
Figure TP150010PCT-appb-I000001
在温度和电压的作用下，可以保证在第一反应机台中的聚合反应持续发生，又可以使第二机台中多组液晶盒同时进行反应，多组液晶盒的反应单位生产时间也比较低。这样可有效的缩短在第一反应机台内的反应时间，使其不再成为整个制备过程的产能瓶颈。
请参阅图3A，所示为本发明第二反应机台的模拟示意图。第二反应机台31是一种新型的第二反应机台，其为多层炉结构，炉体内的层数可以设置为10~100层，更方便容纳来自于第一反应机台内的液晶盒。
Figure TP150010PCT-appb-I000001
请参阅图3B所示为图3A中任一层中的配向膜生成过程示意图。在第二反应机台内，液晶配向单体14继续发生聚合反应，并生成配向膜，使液晶分子12形成预倾角。
Figure TP150010PCT-appb-I000001
在步骤S206中，判断所述液晶盒在所述第二反应机台中的时间是否达到第二预设时间。
在步骤S207中，如果达到第二预设时间，则将所述液晶盒从所述第二反应机台中移出。
所述液晶配向单体发生聚合反应时，向第一基板或第二基板移动并形成凸起物；所述液晶分子在所述凸起物的作用下形成预倾角。
Figure TP150010PCT-appb-I000001
可以理解的是：第一反应机台由于需要提供紫外线照射，配合温度与电压以启动液晶配向单体开始聚合反应形成预倾角，因此，对于紫外线照度等要求较为严苛，应采用成本较高的高精度仪器。而第二反应机台仅需温度和电压，以维持所述聚合反应继续发生，避免游离的液晶配向单体造成面板点灯缺陷，而该步骤采用一般设备即可，成本较低。
Figure TP150010PCT-appb-I000001
本发明通过对第二反应机台的设计，减少了在第一反应机台内的时间，而第二反应机台的容量较大，单位生产时间很低，这样虽然增加了一个生产步骤，但实际的单位生产时间却得到了降低。避免了第一反应机台成为液晶面板的配向膜成为产能瓶颈，提高了液晶面板的整体制备效率。
Figure TP150010PCT-appb-I000001
实施例二
请参阅图4所示，为本发明实例中液晶面板的配向膜制作方法的流程示意图。
与实施例一的制作方法的差别在于，没有实施例一中的步骤S206和S207，取而代之的是增加了步骤S406。
在步骤S406中，按照预定速度使液晶盒在第二反应机台中移动。
请参阅图5，为第二反应机台的模拟示意图。可以理解的是：第一反应机台与实施例一是相同。不同之处在于，第二反应机台的构造不同，体现在：所述第二反应机台包括传送带，用于将所述液晶盒从第二反应机台的入口传送至出口，并在第二反应机台内所述液晶配向单体14将聚合反应进行完全，并使液晶分子12产生足够的预倾角、且无游离状态的液晶配向单体存在。
其中，传送带的长度范围为10米到100米。
其中，传送带的长度和所述预定速度的设置，目的是使所述液晶盒在第二反应机台中的反应时间达到实施例一种的第二预设时间。
可以理解的是：第一反应机台由于需要提供紫外线照射，配合温度与电压以启动液晶配向单体开始聚合反应，因此，对于紫外线照度等要求较为严苛，应采用成本较高的高精度仪器。而第二反应机台仅需温度和电压，以维持所述聚合反应继续发生，采用一般设备即可，成本较低。
本发明通过对第二反应机台的设计，减少了在第一反应机台内的时间，而第二反应机台的容量较大，且其也是传送机构的一部分，充分利用了之前传送机构功能单一的情况，这样使单位生产时间很低。避免了第一反应机台成为液晶面板的配向膜成为产能瓶颈，提高了液晶面板的整体制备效率。
如实施例一与实施例二所示，本发明给出了新的第二反应机台的设计和对应的配向膜制作方法。可以理解的是，基于上述两个实施例所衍生出来的，用温度和电压来替代紫外线照射的其他实施方式，皆在本发明的发明精髓之内。
实施例三
请参阅表1，所示为对本发明实施例所设计的第二反应机台及对应的配向膜制作方法的验证结果示意图。
Figure TP150010PCT-appb-I000002
实验中，采取第一反应机台的紫外线光（UV1）后不维持电压和维持电压分别进行温度实验，第二机台温度为50℃。 从结果可看出，当UV1时间相同时，UV1结束后若不加电压，而基板仍滞留于50℃的第二机台上15min，其预倾角（pre-tilt）与未滞留于第二机台的相同。说明未加电压情况下无法形成预倾角。
分别缩短UV1时间到165s和145s，UV1结束后，保持电压不变，当基板在50℃的第二机台上分别滞留15min和30min时，可得到比UV1时间未缩短时更大程度的预倾角。
因此，可通过适当时间温度的作用来替代部分UV1的作用，来得到相同的预倾角。
可以理解的是：虽然各实施例的侧重不同，但其设计思想是一致的，某个实施例中没有详述的部分，可以参见说明书全文的详细描述，不再赘述。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通测试人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (18)

  1. 一种液晶面板的配向膜制作方法，其中包括以下步骤：
    Figure TP150010PCT-appb-I000001
    在第一基板与第二基板之间注入液晶混合物，并进行贴盒，以形成液晶盒，所述液晶混合物包含液晶分子和液晶配向单体；
    将所述液晶盒放入第一反应机台中，以接收所述第一反应机台所提供电压、紫外线照射、以及温度，使所述液晶配向单体发生聚合反应，其中，所述第一反应机台所提供的电压为7V~50V、紫外线照射的照度为0.05~120毫瓦/平方厘米、以及温度为25℃~80℃；判断所述液晶盒在所述第一反应机台中的时间是否达到第一预设时间；
    Figure TP150010PCT-appb-I000001
    如果达到所述第一预设时间，则将所述液晶盒从所述第一反应机台移至第二反应机台中，以接收所述第二反应机台所提供电压、以及温度，使所述液晶配向单体继续发生聚合反应，其中，所述第二反应机台所提供的电压为1V~50V、以及温度为10℃~100℃；
    判断所述液晶盒在所述第二反应机台中的时间是否达到第二预设时间；以及
    如果达到第二预设时间，则将所述液晶盒从所述第二反应机台中移出使所述第一基板与所述第二基板的内表面分别形成配向膜。
  2. 如权利要求1所述的配向膜制作方法，其中，所述第二反应机台包括传送带，用于将所述液晶盒从第二反应机台的入口传送至出口，并在所述第二反应机台内完成所述聚合反应。
    Figure TP150010PCT-appb-I000001
  3. 如权利要求2所述的配向膜制作方法，其中，传送带的长度范围为10~100米。
  4. 如权利要求1所述的配向膜制作方法，其中，所述第二反应机台为多层炉结构，炉体内的层数为10~100层。
  5. 如权利要求1所述的配向膜制作方法，其中，所述在第一基板与第二基板之间注入液晶混合物的步骤之前，还包括步骤：
    制备所述液晶混合物，其中所述液晶配向单体在所述液晶混合物中的比例为2000~5000PPM。
    Figure TP150010PCT-appb-I000001
  6. 如权利要求5所述的配向膜制作方法，其中，所述液晶配向单体为芳香族。
    Figure TP150010PCT-appb-I000001
  7. 如权利要求6所述的配向膜制作方法，其中，在所述进行贴盒的步骤中，还包括：
    将所述第一基板与第二基板错开一预定距离，至裸露所述第二基板的电压接触点，用于接收所述第一反应机台或第二反应机台所提供的电压。
  8. 如权利要求1所述的配向膜制作方法，其中，所述液晶配向单体发生聚合反应后的步骤还包括：
    所述液晶配向单体向第一基板或第二基板移动并形成凸起物；
    Figure TP150010PCT-appb-I000001
    所述液晶分子在所述凸起物的作用下形成预倾角。
  9. 一种液晶面板的配向膜制作方法，其中，包括以下步骤：
    在第一基板与第二基板之间注入液晶混合物，并进行贴盒，以形成液晶盒，所述液晶混合物包含液晶分子和液晶配向单体；
    将所述液晶盒放入第一反应机台中，以接收所述第一反应机台所提供电压、紫外线照射、以及温度，使所述液晶配向单体发生聚合反应；
    判断所述液晶盒在所述第一反应机台中的时间是否达到第一预设时间；
    Figure TP150010PCT-appb-I000001
    如果达到所述第一预设时间，则将所述液晶盒从所述第一反应机台移至第二反应机台中，以接收所述第二反应机台所提供电压、以及温度，使所述液晶配向单体继续发生聚合反应，并在所述第一基板与所述第二基板的内表面分别形成配向膜。
  10. 如权利要求9所述的配向膜制作方法，其中，所述第二反应机台包括传送带，用于将所述液晶盒从第二反应机台的入口传送至出口，并在所述第二反应机台内完成所述聚合反应。
    Figure TP150010PCT-appb-I000001
  11. 如权利要求10所述的配向膜制作方法，其中，传送带的长度范围为10~100米。
  12. 如权利要求9所述的配向膜制作方法，其中，所述第二反应机台为多层炉结构，炉体内的层数为10~100层。
  13. 如权利要求12所述的配向膜制作方法，其中，还包括如下步骤：
    Figure TP150010PCT-appb-I000001
    判断所述液晶盒在所述第二反应机台中的时间是否达到第二预设时间；以及
    如果达到第二预设时间，则将所述液晶盒从所述第二反应机台中移出。
  14. 如权利要求9所述的配向膜制作方法，其中，所述第一反应机台提供的电压为7V~50V、紫外线照射的照度为0.05~120毫瓦/平方厘米、以及温度为25℃~80℃；
    所述第二反应机台提供的电压为1V~50V、以及温度为10℃~100℃。
    Figure TP150010PCT-appb-I000001
  15. 如权利要求9所述的配向膜制作方法，其中，所述在第一基板与第二基板之间注入液晶混合物的步骤之前，还包括步骤：
    制备所述液晶混合物，其中所述液晶配向单体在所述液晶混合物中的比例为2000~5000PPM。
  16. 如权利要求15所述的配向膜制作方法，其中，所述液晶配向单体为芳香族。
  17. 如权利要求16所述的配向膜制作方法，其中，在所述进行贴盒的步骤中，还包括：
    Figure TP150010PCT-appb-I000001
    将所述第一基板与第二基板错开一预定距离，至裸露所述第二基板的电压接触点，用于接收所述第一反应机台或第二反应机台所提供的电压。
  18. 如权利要求9所述的配向膜制作方法，其中，所述液晶配向单体发生聚合反应后的步骤还包括：
    所述液晶配向单体向第一基板或第二基板移动并形成凸起物；
    所述液晶分子在所述凸起物的作用下形成预倾角。
PCT/CN2015/072837 2015-02-06 2015-02-12 液晶面板的配向膜制作方法 Ceased WO2016123817A1 (zh)

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