CN109581752A - The coating method and coating system of alignment liquid - Google Patents
The coating method and coating system of alignment liquid Download PDFInfo
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- CN109581752A CN109581752A CN201811579666.1A CN201811579666A CN109581752A CN 109581752 A CN109581752 A CN 109581752A CN 201811579666 A CN201811579666 A CN 201811579666A CN 109581752 A CN109581752 A CN 109581752A
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- dispensing area
- voltage
- alignment liquid
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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
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- Nonlinear Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention relates to a kind of coating method of alignment liquid and coating systems, the coating method of one of alignment liquid includes: that dispensing area is arranged on substrate, the dispensing area includes the first dispensing area and the second dispensing area, and second dispensing area is arranged around first dispensing area;First voltage is imported in coating apparatus, and the coating apparatus is made to be coated with alignment liquid on first dispensing area;Second voltage is imported in coating apparatus, and the coating apparatus is made to be coated with alignment liquid on second dispensing area;Wherein, the second voltage is greater than the first voltage.The present invention makes the discharge-amount of alignment liquid in the second dispensing area be greater than the discharge-amount of alignment liquid in the first dispensing area, solves the problems, such as alignment liquid thick middle thin edge, keeps the orientation film thickness to be formed uniform, improve the production yield of display panel.
Description
Technical field
The present invention relates to field of display technology, more particularly to the coating method and coating system of a kind of alignment liquid.
Background technique
In TFT-LCD (thin film transistor-liquid crystal display) manufacturing process, need in thin film transistor-liquid crystal display
Alignment film is respectively set in array substrate and color membrane substrates, and alignment film is solidified by alignment liquid.Orientation is coated on substrate
When liquid, due to the phenomenon that alignment liquid, which has, to be flowed diffusivity, alignment liquid thick middle thin edge is easy to appear after coating, make shape
At orientation film thickness it is different, so that display panel brightness be caused to show the production yield for unevenly reducing display panel.
Summary of the invention
Based on this, it is necessary in view of the above-mentioned problems, a kind of coating method of alignment liquid and the manufacturing method of alignment film are provided,
It solves the problems, such as alignment liquid thick middle thin edge, keeps the orientation film thickness to be formed uniform, improve the production yield of display panel.
A kind of coating method of alignment liquid, comprising:
Dispensing area is set on substrate, and the dispensing area includes the first dispensing area and the second dispensing area, by institute
The second dispensing area is stated to be arranged around first dispensing area;
First voltage is imported in coating apparatus, and the coating apparatus is made to be coated with orientation on first dispensing area
Liquid;
Second voltage is imported in coating apparatus, and the coating apparatus is made to be coated with orientation on second dispensing area
Liquid;
Wherein, the second voltage is greater than the first voltage.
First dispensing area is the display area on the substrate in one of the embodiments,.
The first voltage is first obtained in one of the embodiments, obtains described second further according to the first voltage
Voltage.
In one of the embodiments, before alignment liquid coating, a barrier structure is formed around the dispensing area,
The barrier structure is for stopping the alignment liquid to diffuse to outside the dispensing area.
In one of the embodiments, after alignment liquid is coated with, the barrier structure is removed.
The material that the barrier structure uses in one of the embodiments, for can hardened forming in air macromolecule
Material.
Dispensing area is divided into the first dispensing area and the second dispensing area by the coating method of above-mentioned alignment liquid, and first applies
The setting of cloth region is at middle part, and the second dispensing area is arranged around the first dispensing area, and respectively the first dispensing area and second
Dispensing area provides different voltage, and the discharge-amount of alignment liquid in the second dispensing area is made to be greater than alignment liquid in the first dispensing area
Discharge-amount, solve the problems, such as alignment liquid thick middle thin edge, keep the orientation film thickness to be formed uniform, improve the life of display panel
Produce yield.
Conceived based on foregoing invention, propose a kind of coating method of alignment liquid, comprising:
Dispensing area is set on substrate, and the dispensing area includes the first dispensing area and the second dispensing area, by institute
The second dispensing area is stated to be arranged around first dispensing area;
A barrier structure is formed around the dispensing area, the barrier structure is for stopping the alignment liquid to spread
Outside to the dispensing area;
First voltage is imported in coating apparatus, and the coating apparatus is made to be coated with orientation on first dispensing area
Liquid;
Second voltage is imported in coating apparatus, and the coating apparatus is made to be coated with orientation on second dispensing area
Liquid;
Remove the barrier structure;
Wherein, the second voltage is greater than the first voltage, first obtains the first voltage, further according to first electricity
Pressure obtains the second voltage;
First dispensing area is the display area on the substrate;
The material that the barrier structure uses for can hardened forming in air high molecular material.
Dispensing area is divided into the first dispensing area and the second dispensing area by the coating method of above-mentioned alignment liquid, and first applies
The setting of cloth region is at middle part, and the second dispensing area is arranged around the first dispensing area, and respectively the first dispensing area and second
Dispensing area provides different voltage, and the discharge-amount of alignment liquid in the second dispensing area is made to be greater than alignment liquid in the first dispensing area
Discharge-amount, solve the problems, such as alignment liquid thick middle thin edge, keep the orientation film thickness to be formed uniform, improve the life of display panel
Produce yield.
Conceived based on foregoing invention, propose a kind of alignment liquid coating system, comprising:
Dispensing area setup unit, for the first dispensing area and the second dispensing area to be arranged;
First power supply unit, for providing first voltage for the first dispensing area;
Second power supply unit, for providing second voltage for the second dispensing area;
Be coated with driving unit, for driving apparatus for coating to be coated substrate, the coating driving unit respectively with institute
State dispensing area setup unit, the first power supply unit and the connection of the second power supply unit;
Wherein, second dispensing area is set around first dispensing area;The second voltage is greater than described the
One voltage.
First dispensing area is corresponding with the display area on the substrate in one of the embodiments,.
In one of the embodiments, further include control unit, described control unit respectively with first power supply unit
It is connected with second power supply unit, for adjusting the first voltage and the second voltage.
Dispensing area is divided into the first dispensing area and the second dispensing area, the first coating by above-mentioned alignment liquid coating system
Region setting is arranged in middle part, the second dispensing area around the first dispensing area, and respectively the first dispensing area and second applies
Cloth region provides different voltage, and the discharge-amount of alignment liquid in the second dispensing area is made to be greater than alignment liquid in the first dispensing area
Discharge-amount solves the problems, such as alignment liquid thick middle thin edge, keeps the orientation film thickness to be formed uniform, improves the production of display panel
Yield.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the method flow diagram in one embodiment;
Fig. 2 is the structural schematic diagram in one embodiment;
Fig. 3 is the method flow diagram in another embodiment;
Fig. 4 is the structural schematic diagram in another embodiment;
Fig. 5 is the circuit diagram in one embodiment;
Fig. 6 is the structural schematic diagram of dispensing area in one embodiment;
Fig. 7 is the circuit diagram in another embodiment.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and
It is not used in restriction the application.
A kind of coating method of alignment liquid, as shown in Figs. 1-2, comprising:
S101, dispensing area is set on substrate 200, the dispensing area includes that the first dispensing area 201 and second applies
Second dispensing area 202 is arranged around first dispensing area 201 in cloth region 202;
S102, first voltage is imported in coating apparatus, apply the coating apparatus on first dispensing area 201
Cloth alignment liquid;
S103, second voltage is imported in coating apparatus, apply the coating apparatus on second dispensing area 202
Cloth alignment liquid;
Wherein, second voltage is greater than first voltage, and the discharge-amount of the alignment liquid in the second dispensing area 202 is made to be greater than first
The discharge-amount of alignment liquid in dispensing area 201 solves the problems, such as the alignment liquid thick middle thin edge being coated on substrate 200, makes shape
At orientation film thickness it is uniform, improve the production yield of display panel.
Wherein, above-mentioned alignment liquid is polyimides.
In one embodiment, as shown in Fig. 2, the first dispensing area 201 be substrate 200 on display area, i.e., first
The area of dispensing area 201 is identical as the size equal shape of display area;Second dispensing area 202 is around the first coating
Region 201 is arranged, after the best area of the second dispensing area 202 can be compared and analyzed by a large amount of data of experiment collection
It determines.
In one embodiment, the first voltage is first obtained, obtains the second voltage further according to the first voltage.
First voltage is selected according to the selectable value in coating apparatus, after determining first voltage, passes through experimental selection second voltage.
In above-mentioned experiment, the specific steps once tested are as follows: after being coated with alignment liquid on the first dispensing area, in the first electricity
Increase voltage on the basis of pressure, the second dispensing area is coated, observes at this voltage, the film surface situation on substrate, and
Measure film thickness after the completion of coating, the display situation of the last test substrate after striking.Change on the basis of first voltage
The voltage of increase, repeats the above steps, and determines second voltage after collecting a large amount of data.
In one embodiment, as shown in Figures 3 and 4, the step of coating method of the alignment liquid further include: applied in alignment liquid
Before cloth, a barrier structure 403 is formed around dispensing area;After alignment liquid coating, the barrier structure 403 is removed.
Therefore in the embodiment, the coating method step of alignment liquid includes:
S301, dispensing area is set over substrate 400, dispensing area includes the first dispensing area 401 and the second applying area
Second dispensing area 402 is arranged around the first dispensing area 401 in domain 402;
S302, a barrier structure 403 is formed around dispensing area;
S303, first voltage is imported in coating apparatus, coating apparatus is made to be coated with orientation on the first dispensing area 401
Liquid;
S304, second voltage is imported in coating apparatus, coating apparatus is made to be coated with orientation on the second dispensing area 402
Liquid;
S305, barrier structure 403 is removed.
Wherein, the barrier structure 403 is for stopping alignment liquid to diffuse to outside dispensing area, and the material used is can be in sky
The high molecular material of hardened forming in gas.Specifically, high molecular material can be single high molecular material, or mixing is high
Molecular material is not specifically limited in the present embodiment;The cross section of barrier structure can select according to the actual situation triangle,
Rectangular, trapezoidal or other shapes, are not specifically limited in the present embodiment.
In step S305, by way of heating, spraying solvent or etching, which is removed.
The coating method of above-mentioned alignment liquid is formed with barrier structure 403 around dispensing area, can prevent alignment liquid from expanding
It is dissipated to outside dispensing area, other circuit structures on substrate is impacted;Dispensing area is divided into 401 He of the first dispensing area
Second dispensing area 402, the setting of the first dispensing area 401 surround the first dispensing area 401 in middle part, the second dispensing area 402
Setting, and respectively the first dispensing area 401 and the second dispensing area 402 provide different voltage, make the second dispensing area 402
The discharge-amount of middle alignment liquid is greater than the discharge-amount of alignment liquid in the first dispensing area 401, solves the orientation being coated on substrate 400
The problem of liquid thick middle thin edge, keeps the orientation film thickness to be formed uniform, improves the production yield of display panel.
Conceived based on foregoing invention, a kind of alignment liquid coating system is proposed, as it can be seen in figures 5 and 6, including:
Dispensing area setup unit 501, for the first dispensing area 601 and the second dispensing area 602 to be arranged;
First power supply unit 502, for providing first voltage for the first dispensing area 601;
Second power supply unit 503, for providing second voltage for the second dispensing area 602;
It is coated with driving unit 504, for driving apparatus for coating to be coated substrate, the coating driving unit 504 difference
It is connect with dispensing area setup unit 501, the first power supply unit 502 and the second power supply unit 503;
Wherein, the second dispensing area 602 is set around the first dispensing area 601, and second voltage is greater than first voltage, makes the
The discharge-amount of alignment liquid in two dispensing areas 602 is greater than the discharge-amount of alignment liquid in the first dispensing area 601, solves substrate
The problem of alignment liquid thick middle thin edge being coated on 200, keeps the orientation film thickness to be formed uniform, improve the production of display panel
Yield.
Wherein, above-mentioned alignment liquid is polyimides.
In one embodiment, the first dispensing area 601 is corresponding with the display area on substrate, i.e., in the coating system
In, the area of the first dispensing area 601 can be set according to the display area on substrate.Second dispensing area 602 is applied around first
Cloth region 601 is set, and the best area of the second dispensing area 602 can collect a large amount of data by experiment and compare and analyze
After determine.
In one embodiment, with continued reference to Fig. 5-6, which further includes control unit 505, the control unit
505 connect with the first power supply unit 502 and the second power supply unit 503 respectively, for adjusting first voltage and second voltage.Its
In, first voltage can be selected according to the selectable value in coating apparatus, after determining first voltage, be established by experiment acquisition database
Quantitative relation between first voltage and second voltage and each parameter selects second voltage.
In above-mentioned experiment, the specific steps once tested are as follows: after the first dispensing area 601 is coated with alignment liquid, first
Increasing voltage on the basis of voltage, the second dispensing area 602 is coated, it observes at this voltage, the film surface situation on substrate,
And film thickness is measured after the completion of coating, the display situation of the last test substrate after striking.Change on the basis of first voltage
The voltage of upper increase, repeats the above steps, and determines second voltage after collecting a large amount of data.
In one embodiment, as shown in fig. 7, the coating system further includes that barrier structure generates and removes unit 506, resistance
Gear structural generation is connect with removal unit 506 with control unit 505, and before alignment liquid coating, control unit 505 controls blocking junction
Structure generates and removes unit 506 and forms a barrier structure around dispensing area on substrate, prevents alignment liquid from diffusing to coating
Outside region, other circuit structures on substrate are impacted;And after coating issue instruction make barrier structure generate with
Removal unit 506 removes the barrier structure specifically can be by way of heating, spraying solvent or etching, by the blocking junction
Structure removes.
Wherein, the material which uses for can hardened forming in air high molecular material, specifically, high score
Sub- material can be single high molecular material, or mixing high molecular material is not specifically limited in the present embodiment;Resistance
The cross section of gear structure can select triangle, rectangular, trapezoidal or other shapes according to the actual situation, not do in the present embodiment
It is specific to limit.
Above-mentioned alignment liquid coating system, forms barrier structure on substrate around dispensing area, can prevent alignment liquid from expanding
It is dissipated to outside dispensing area, other circuit structures on substrate is impacted, the production yield of display panel is improved.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of coating method of alignment liquid characterized by comprising
Dispensing area is set on substrate, and the dispensing area includes the first dispensing area and the second dispensing area, by described the
Two dispensing areas are arranged around first dispensing area;
First voltage is imported in coating apparatus, and the coating apparatus is made to be coated with alignment liquid on first dispensing area;
Second voltage is imported in coating apparatus, and the coating apparatus is made to be coated with alignment liquid on second dispensing area;
Wherein, the second voltage is greater than the first voltage.
2. the coating method of alignment liquid according to claim 1, which is characterized in that first dispensing area is the substrate
On display area.
3. the coating method of alignment liquid according to claim 1, which is characterized in that the first voltage is first obtained, further according to
The first voltage obtains the second voltage.
4. the coating method of alignment liquid according to claim 1, which is characterized in that before alignment liquid coating, in the coating
A barrier structure is formed around region, the barrier structure is for stopping the alignment liquid to diffuse to outside the dispensing area.
5. the coating method of alignment liquid according to claim 4, which is characterized in that after alignment liquid coating, remove institute
State barrier structure.
6. the coating method of alignment liquid according to claim 4 or 5, which is characterized in that the material that the barrier structure uses
For can hardened forming in air high molecular material.
7. a kind of coating method of alignment liquid characterized by comprising
Dispensing area is set on substrate, and the dispensing area includes the first dispensing area and the second dispensing area, by described the
Two dispensing areas are arranged around first dispensing area;
A barrier structure is formed around the dispensing area, the barrier structure is for stopping the alignment liquid to diffuse to institute
It states outside dispensing area;
First voltage is imported in coating apparatus, and the coating apparatus is made to be coated with alignment liquid on first dispensing area;
Second voltage is imported in coating apparatus, and the coating apparatus is made to be coated with alignment liquid on second dispensing area;
Remove the barrier structure;
Wherein, the second voltage is greater than the first voltage, first obtains the first voltage, obtains further according to the first voltage
Take the second voltage;
First dispensing area is display area;
The material that the barrier structure uses for can hardened forming in air high molecular material.
8. a kind of alignment liquid coating system characterized by comprising
Dispensing area setup unit, for the first dispensing area and the second dispensing area to be arranged;
First power supply unit, for providing first voltage for the first dispensing area;
Second power supply unit, for providing second voltage for the second dispensing area;
Be coated with driving unit, for driving apparatus for coating to be coated substrate, the coating driving unit respectively with the painting
Cloth region setup unit, the first power supply unit and the connection of the second power supply unit;
Wherein, second dispensing area is set around first dispensing area;The second voltage is greater than first electricity
Pressure.
9. alignment liquid coating system according to claim 8, which is characterized in that first dispensing area and the substrate
On display area it is corresponding.
10. alignment liquid coating system according to claim 8, which is characterized in that further include control unit, the control is single
Member is connect with first power supply unit and second power supply unit respectively, for adjusting the first voltage and described second
Voltage.
Priority Applications (2)
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CN201811579666.1A CN109581752B (en) | 2018-12-24 | 2018-12-24 | Coating method and coating system of alignment liquid |
PCT/CN2018/124659 WO2020133153A1 (en) | 2018-12-24 | 2018-12-28 | Alignment liquid coating method and system |
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CN201811579666.1A CN109581752B (en) | 2018-12-24 | 2018-12-24 | Coating method and coating system of alignment liquid |
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CN109581752A true CN109581752A (en) | 2019-04-05 |
CN109581752B CN109581752B (en) | 2021-07-27 |
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CN114624914A (en) * | 2022-03-25 | 2022-06-14 | 广州华星光电半导体显示技术有限公司 | Liquid crystal display panel |
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CN114624914B (en) * | 2022-03-25 | 2024-01-09 | 广州华星光电半导体显示技术有限公司 | Liquid crystal display panel |
CN114779533A (en) * | 2022-04-11 | 2022-07-22 | Tcl华星光电技术有限公司 | Alignment film and preparation method thereof |
CN114721187A (en) * | 2022-04-28 | 2022-07-08 | 广州华星光电半导体显示技术有限公司 | Manufacturing method of alignment film and liquid crystal display panel |
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CN109581752B (en) | 2021-07-27 |
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