CN109143688B - Alignment film material and manufacturing method of liquid crystal display panel - Google Patents
Alignment film material and manufacturing method of liquid crystal display panel Download PDFInfo
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- CN109143688B CN109143688B CN201810923460.XA CN201810923460A CN109143688B CN 109143688 B CN109143688 B CN 109143688B CN 201810923460 A CN201810923460 A CN 201810923460A CN 109143688 B CN109143688 B CN 109143688B
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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
- G02F1/133723—Polyimide, polyamide-imide
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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
Abstract
The invention provides an alignment film material and a manufacturing method of a liquid crystal display panel. The alignment film material includes: the liquid crystal display panel comprises a photosensitive reaction monomer, photosensitive polyimide and a solvent, wherein the reaction wavelength of the photosensitive reaction monomer is a first wavelength, the reaction wavelength of the photosensitive polyimide is a second wavelength, the first wavelength is larger than the second wavelength, and an alignment film comprising a polymer layer and a polyimide layer which can enable liquid crystal molecules to form pre-tilt angle and is arranged in an oriented mode can be prepared through two times of UV light irradiation with different wavelengths, so that the manufacturing process of the alignment film is optimized, the quality of the alignment film is improved, and the response speed of the liquid crystal display panel is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to an alignment film material and a manufacturing method of a liquid crystal display panel.
Background
With the development of Display technology, flat panel Display devices such as Liquid Crystal Displays (LCDs) have advantages of high image quality, power saving, thin body, and wide application range, and thus are widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, and become the mainstream of Display devices.
Most of the existing liquid crystal display devices in the market are backlight liquid crystal displays (lcds), which include a liquid crystal display panel and a backlight module (backlight module). The liquid crystal display panel has the working principle that liquid crystal molecules are placed in two parallel glass substrates, a plurality of vertical and horizontal fine wires are arranged between the two glass substrates, and the liquid crystal molecules are controlled to change directions by electrifying or not, so that light rays of the backlight module are refracted out to generate pictures. Generally, a Liquid Crystal display panel includes a Color Filter (CF) substrate, a Thin Film Transistor (TFT) array substrate, a Liquid Crystal (LC) sandwiched between the Color Filter substrate and the TFT substrate, and a Sealant frame (Sealant).
In the liquid crystal display panel, the liquid crystal display response time mainly includes the turn-on corresponding time (T)on) And a shutdown response time (T)off) Two moieties, wherein TonIn addition to being influenced by the properties of the liquid crystal material itself, it is also related to the electric field strength, ToffMore often than not, it is closely related to the properties of the liquid crystal material itself, with respect to ToffThe following calculation formula is specifically adopted: t isoffγ d/2W; where γ denotes rotational viscosity of liquid crystal, d denotes cell thickness of liquid crystal display panel, and W denotes surface energy of liquid crystal obtained from substrate, when γ and d cannot be adjusted, we can increase surface energy of liquid crystal obtained from substrate to lower ToffThereby achieving the purpose of quick response of the liquid crystal display.
In order to increase the surface energy of the liquid crystal obtained from the substrate, a large number of rigid groups need to be introduced into the substrate surface, so the prior art proposes a technical scheme of adding a reactive monomer into an alignment film (generally a Polyimide (PI) film), specifically: reactive Monomers (RMs) are added into an alignment film material, and after Ultraviolet (UV) light irradiation, the reactive monomers form a polymer network on the alignment film to achieve the purpose of increasing the surface energy of liquid crystal obtained from a substrate.
Disclosure of Invention
The invention aims to provide an alignment film material which can improve the quality of an alignment film and improve the response speed of a liquid crystal display panel.
The present invention also provides a method for fabricating a liquid crystal display panel, which can improve the quality of an alignment film and increase the response speed of the liquid crystal display panel.
In order to achieve the above object, the present invention provides an alignment film material, comprising: the photosensitive polyimide film comprises a photosensitive reaction monomer, photosensitive polyimide and a solvent, wherein the reaction wavelength of the photosensitive reaction monomer is a first wavelength, the reaction wavelength of the photosensitive polyimide is a second wavelength, and the first wavelength is larger than the second wavelength.
The first wavelength is 340-400 nm, and the second wavelength is 250-320 nm.
The photosensitive reactive monomer has a structure represented by one of formulae 1 to 4:
wherein P represents a polymerizable group having a structure represented by one of formulae 5 to 7, n is equal to 1, 2, or 3;
l is one or more-CH of fluorine group, chlorine group, linear or branched alkyl with 5-20 carbon atoms, and linear or branched alkyl with 5-20 carbon atoms2A first group obtained by substituting a group with a phenyl group, a cycloalkyl group, -O-, -CONH-, -COO-, -O-CO-, -COO-or-CH ═ CH-group, or a second group obtained by substituting one or more hydrogen atoms in a linear or branched alkyl group having 5 to 20 carbon atoms or the first group with fluorine or chlorine atoms. .
The photosensitive polyimide has a structure as shown in formula 8:
wherein x is a positive integer.
The solvent is one or more of N-methyl pyrrolidone, N-ethyl pyrrolidine, gamma-caprolactone, dimethyl sulfoxide and dichloromethane.
The invention also provides a manufacturing method of the liquid crystal display panel, which comprises the following steps:
step S1, providing an alignment film material, wherein the alignment film material comprises: the photosensitive polyimide film comprises a photosensitive reaction monomer, photosensitive polyimide and a solvent, wherein the reaction wavelength of the photosensitive reaction monomer is a first wavelength, the reaction wavelength of the photosensitive polyimide is a second wavelength, and the first wavelength is greater than the second wavelength;
step S2, providing a first substrate and a second substrate, and coating the alignment film material on the first substrate and the second substrate;
step S3, carrying out first UV light irradiation on the alignment film materials on the first substrate and the second substrate with a first wavelength, so that the photosensitive reaction monomer is polymerized to form a first polymer layer and a second polymer layer which are respectively positioned on the first substrate and the second substrate;
step S4, baking the alignment film materials on the first substrate and the second substrate to volatilize the solvent in the alignment film materials, and forming a first polyimide layer between the first substrate and the first polymer layer and a second polyimide layer between the second substrate and the second polymer layer;
step S5, performing a second UV light irradiation on the alignment film materials on the first substrate and the second substrate at a second wavelength, so that the first polyimide layer and the second polyimide layer are aligned to form a first alignment film and a second alignment film on the first substrate and the second substrate;
step S6, dropping liquid crystal on the first substrate or the second substrate, and combining the first substrate and the second substrate into a box to obtain the liquid crystal display panel, wherein the liquid crystal in the liquid crystal display panel forms a predetermined pretilt angle along with the alignment of the first polyimide layer and the second polyimide layer.
The first wavelength is 340-400 nm, and the second wavelength is 250-320 nm.
The photosensitive reactive monomer has a structure represented by one of formulae 1 to 4:
wherein P represents a polymerizable group having a structure represented by one of formulae 5 to 7, n is equal to 1, 2, or 3;
l is one or more-CH of fluorine group, chlorine group, linear or branched alkyl with 5-20 carbon atoms, and linear or branched alkyl with 5-20 carbon atoms2A first group obtained by substituting a group with a phenyl group, a cycloalkyl group, -O-, -CONH-, -COO-, -O-CO-, -COO-or-CH ═ CH-group, or a second group obtained by substituting one or more hydrogen atoms in a linear or branched alkyl group having 5 to 20 carbon atoms or the first group with fluorine or chlorine atoms.
The photosensitive polyimide has a structure as shown in formula 8:
wherein x is a positive integer.
The solvent is one or more of N-methyl pyrrolidone, N-ethyl pyrrolidine, gamma-caprolactone, dimethyl sulfoxide and dichloromethane.
The invention has the beneficial effects that: the invention provides an alignment film material, which comprises: the liquid crystal display panel comprises a photosensitive reaction monomer, photosensitive polyimide and a solvent, wherein the reaction wavelength of the photosensitive reaction monomer is a first wavelength, the reaction wavelength of the photosensitive polyimide is a second wavelength, the first wavelength is larger than the second wavelength, and an alignment film comprising a polymer layer and a polyimide layer which can enable liquid crystal molecules to form pre-tilt angle and is arranged in an oriented mode can be prepared through two times of UV light irradiation with different wavelengths, so that the manufacturing process of the alignment film is optimized, the quality of the alignment film is improved, and the response speed of the liquid crystal display panel is improved. The invention also provides a manufacturing method of the liquid crystal display panel, which can improve the quality of the alignment film and improve the response speed of the liquid crystal display panel.
Drawings
For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.
In the drawings, there is shown in the drawings,
FIG. 1 is a schematic view of a liquid crystal display panel manufactured by the method of manufacturing a liquid crystal display panel according to the present invention;
FIG. 2 is a flow chart of a method for fabricating a liquid crystal display panel according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
The invention provides an alignment film material, which comprises: the photosensitive polyimide film comprises a photosensitive reaction monomer, photosensitive polyimide and a solvent, wherein the reaction wavelength of the photosensitive reaction monomer is a first wavelength, the reaction wavelength of the photosensitive polyimide is a second wavelength, and the first wavelength is larger than the second wavelength.
Specifically, the first wavelength is 340-400 nm, the second wavelength is 250-320 nm, and preferably, the first wavelength is 360nm, and the second wavelength is 280 nm.
Specifically, the photosensitive reactive monomer has a structure represented by one of formulas 1 to 4:
wherein P represents a polymerizable group having a structure represented by one of formulae 5 to 7, n is equal to 1, 2, or 3;
l is a fluorine group, a chlorine group, a linear or branched alkyl group having 5 to 20 carbon atomsOne or more-CH's in alkyl2A first group obtained by substituting a group with a phenyl group, a cycloalkyl group, -O-, -CONH-, -COO-, -O-CO-, -COO-or-CH ═ CH-group, or a second group obtained by substituting one or more hydrogen atoms in a linear or branched alkyl group having 5 to 20 carbon atoms or the first group with fluorine or chlorine atoms.
Preferably, the photosensitive polyimide has a structure as shown in formula 8:
wherein x is a positive integer.
Specifically, the solvent is one or more of N-ethyl pyrrolidine, gamma-caprolactone, dimethyl sulfoxide and dichloromethane.
In specific implementation, the alignment film material can be obtained by a method that firstly, photosensitive polyimide is dissolved in a solvent to obtain a first solution, preferably, the mass ratio of the photosensitive polyimide to the solvent in the first solution is 3-4%: 97-96%, and then, a photosensitive reaction monomer is dissolved in the first solution to obtain the alignment film material. Preferably, the mass fraction of the photosensitive reactive monomer in the first solution is 0.01-0.5%.
Preferably, the photosensitive reactive monomer has a structure represented by one of formulae 9 to 13:
it should be noted that the alignment film material of the present invention can form an alignment film by two times of UV light irradiation, wherein the wavelength of the first UV light irradiation is a first wavelength and is used for polymerizing the photosensitive reactive monomer to form a polymer layer to increase the surface energy of the liquid crystal obtained from the substrate, the wavelength of the second UV light irradiation is a second wavelength and is used for aligning the polyimide layer, of course, in order to form the polyimide layer, the step of baking the alignment film material between the first UV light irradiation and the second UV light irradiation to volatilize the solvent and form the polyimide layer is further included, the alignment film made by the above alignment film material can form the polymer layer and the oriented polyimide layer capable of forming the pre-tilt angle of the liquid crystal molecules before the liquid crystal display panel is formed into a box, the surface energy of the liquid crystal obtained from the substrate can be increased by forming the polymer layer, promote liquid crystal response speed, through accomplish UV illumination before liquid crystal display panel becomes the box, can avoid UV illumination to destroy liquid crystal molecules and avoid reaction monomer to remain and lead to the ghost in the liquid crystal layer to need not to apply voltage and make the liquid crystal molecule rotatory during UV illumination.
Preferably, the pretilt angle is 0.5-2 degrees.
Referring to fig. 2, the present invention further provides a method for manufacturing a liquid crystal display panel, including the following steps:
step S1, providing an alignment film material, wherein the alignment film material comprises: the photosensitive polyimide film comprises a photosensitive reaction monomer, photosensitive polyimide and a solvent, wherein the reaction wavelength of the photosensitive reaction monomer is a first wavelength, the reaction wavelength of the photosensitive polyimide is a second wavelength, and the first wavelength is larger than the second wavelength.
Specifically, the first wavelength is 340-400 nm, the second wavelength is 250-320 nm, and preferably, the first wavelength is 360nm, and the second wavelength is 280 nm.
Specifically, the photosensitive reactive monomer has a structure represented by one of formulas 1 to 4:
wherein P represents a polymerizable group having a structure represented by one of formulae 5 to 7, n is equal to 1, 2, or 3;
l is one or more-CH of fluorine group, chlorine group, linear or branched alkyl with 5-20 carbon atoms, and linear or branched alkyl with 5-20 carbon atoms2A first group obtained by substituting a group with a phenyl group, a cycloalkyl group, -O-, -CONH-, -COO-, -O-CO-, -COO-or-CH ═ CH-group, or a second group obtained by substituting one or more hydrogen atoms in a linear or branched alkyl group having 5 to 20 carbon atoms or the first group with fluorine or chlorine atoms.
Preferably, the photosensitive polyimide has a structure as shown in formula 8:
wherein x is a positive integer.
Specifically, the solvent is one or more of N-ethyl pyrrolidine, gamma-caprolactone, dimethyl sulfoxide and dichloromethane.
Preferably, the photosensitive reactive monomer has a structure represented by one of formulae 9 to 13:
in specific implementation, the alignment film material can be obtained by a method that firstly, photosensitive polyimide is dissolved in a solvent to obtain a first solution, preferably, the mass ratio of the photosensitive polyimide to the solvent in the first solution is 3-4%: 97-96%, and then, a photosensitive reaction monomer is dissolved in the first solution to obtain the alignment film material. Preferably, the mass fraction of the photosensitive reactive monomer in the first solution is 0.01-0.5%.
Step S2, as shown in fig. 1, provides a first substrate 10 and a second substrate 20, and coats the alignment film material on the first substrate 10 and the second substrate 20.
Specifically, one of the first substrate 10 and the second substrate 20 is a TFT substrate, the other is a CF substrate, a TFT array, a pixel electrode, and the like are prepared on the TFT substrate, and a color filter, a black matrix, a common electrode, and the like are prepared on the CF substrate.
Step S3, performing a first UV light irradiation on the alignment film materials on the first substrate 10 and the second substrate 20 at a first wavelength, so that the photosensitive reactive monomer is polymerized to form a first polymer layer 31 and a second polymer layer 41 on the first substrate 10 and the second substrate 20, respectively.
Specifically, the first polymer layer 31 and the second polymer layer 41 have a polymer network structure, which can increase the surface energy of the liquid crystal obtained from the substrate and reduce the ToffAnd the response speed of the liquid crystal is improved.
Preferably, the illumination intensity of the first UV illumination is 60-80 mW/cm2, and the illumination time is 10-30 min.
Step S4, baking the alignment film materials on the first substrate 10 and the second substrate 20, so that the solvent in the alignment film materials is volatilized, and a first polyimide layer 32 between the first substrate 10 and the first polymer layer 31 and a second polyimide layer 42 between the second substrate 20 and the second polymer layer 41 are formed.
Preferably, the baking temperature is 150-200 ℃, and the baking time is 30 min.
Specifically, the first polyimide layer 32 and the second polyimide layer 42 in the step S4 are not subjected to alignment.
Step S5, performing a second UV light irradiation on the alignment film materials on the first substrate 10 and the second substrate 20 at a second wavelength, so that the first polyimide layer 32 and the second polyimide layer 42 are aligned, and forming the first alignment film 30 and the second alignment film 40 on the first substrate 10 and the second substrate 20.
Specifically, in the step S5, the photosensitive polyimides in the first polyimide layer 32 and the second polyimide layer 42 are caused to react by UV light irradiation, so that the first polyimide layer 32 and the second polyimide layer 42 are aligned, and the aligned first polyimide layer 32 and the aligned second polyimide layer 42 can cause the liquid crystal molecules to form a predetermined pretilt angle thereon.
Preferably, the illumination intensity of the second UV illumination is 60-80 mW/cm2, and the illumination time is 50-300 s.
The reaction process of the first polyimide layer 32 and the second polyimide layer 42 under the second UV light is as follows:
step S6, dropping liquid crystal 50 on the first substrate 10 or the second substrate 20, and combining the first substrate 10 and the second substrate 20 into a cell, so as to obtain the liquid crystal display panel, wherein the liquid crystal 50 in the liquid crystal display panel forms a predetermined pretilt angle along with the alignment of the first polyimide layer 41 and the second polyimide layer 42.
Specifically, the step of assembling the first substrate 10 and the second substrate 20 into the box in step S6 specifically includes coating a sealant and a conductive adhesive on the first substrate 10 or the second substrate 20, then attaching the first substrate 10 and the second substrate 20 together in a vacuum environment, and finally curing the sealant, so as to achieve the purpose of assembling the first substrate 10 and the second substrate 20 into the box, wherein the sealant curing method may be thermosetting or UV curing. In the step S6, liquid crystal is dropped by an One Drop Fill (ODF) process.
Preferably, the pretilt angle is 0.5-2 degrees.
In summary, the present invention provides an alignment film material, including: the liquid crystal display panel comprises a photosensitive reaction monomer, photosensitive polyimide and a solvent, wherein the reaction wavelength of the photosensitive reaction monomer is a first wavelength, the reaction wavelength of the photosensitive polyimide is a second wavelength, the first wavelength is larger than the second wavelength, and an alignment film comprising a polymer layer and a polyimide layer which can enable liquid crystal molecules to form pre-tilt angle and is arranged in an oriented mode can be prepared through two times of UV light irradiation with different wavelengths, so that the manufacturing process of the alignment film is optimized, the quality of the alignment film is improved, and the response speed of the liquid crystal display panel is improved. The invention also provides a manufacturing method of the liquid crystal display panel, which is used for carrying out UV illumination before liquid crystal box forming, so that the conditions that liquid crystal molecules are easy to damage, residual images are caused and reactive monomers with incomplete reaction can be remained in a liquid crystal layer due to the UV illumination after the liquid crystal box forming are avoided, the quality of an alignment film can be improved, and the response speed of the liquid crystal display panel is improved.
As described above, it will be apparent to those skilled in the art that other various changes and modifications may be made based on the technical solution and concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.
Claims (9)
1. An alignment film material, comprising: the photosensitive polyimide film comprises a photosensitive reaction monomer, photosensitive polyimide and a solvent, wherein the reaction wavelength of the photosensitive reaction monomer is a first wavelength, the reaction wavelength of the photosensitive polyimide is a second wavelength, and the first wavelength is greater than the second wavelength;
the photosensitive reactive monomer has a structure represented by one of formulae 1 to 4:
wherein P represents a polymerizable group having a structure represented by one of formulae 5 to 7, n is equal to 1, 2, or 3;
l is one or more-CH of fluorine group, chlorine group, linear or branched alkyl with 5-20 carbon atoms, and linear or branched alkyl with 5-20 carbon atoms2A first group obtained by substituting a group with a phenyl group, a cycloalkyl group, -O-, -CONH-, -COO-, -O-CO-, -COO-or-CH ═ CH-group, or a second group obtained by substituting one or more hydrogen atoms in a linear or branched alkyl group having 5 to 20 carbon atoms or the first group with fluorine or chlorine atoms.
2. The alignment film material according to claim 1, wherein the first wavelength is 340 to 400nm, and the second wavelength is 250 to 320 nm.
3. The alignment film material of claim 1, wherein the photosensitive polyimide has a structure represented by formula 8:
wherein x is a positive integer.
4. The alignment film material of claim 1, wherein the solvent is a combination of one or more of N-methylpyrrolidone, N-ethylpyrrolidine, γ -caprolactone, dimethyl sulfoxide, and methylene chloride.
5. The manufacturing method of the liquid crystal display panel is characterized by comprising the following steps:
step S1, providing an alignment film material, wherein the alignment film material comprises: the photosensitive polyimide film comprises a photosensitive reaction monomer, photosensitive polyimide and a solvent, wherein the reaction wavelength of the photosensitive reaction monomer is a first wavelength, the reaction wavelength of the photosensitive polyimide is a second wavelength, and the first wavelength is greater than the second wavelength;
step S2, providing a first substrate (10) and a second substrate (20), and coating the alignment film material on the first substrate (10) and the second substrate (20);
step S3, carrying out first UV light irradiation on the alignment film materials on the first substrate (10) and the second substrate (20) at a first wavelength, so that the photosensitive reaction monomers are polymerized to form a first polymer layer (31) and a second polymer layer (41) which are respectively positioned on the first substrate (10) and the second substrate (20);
step S4, baking the alignment film materials on the first substrate (10) and the second substrate (20) to volatilize the solvent in the alignment film materials, and forming a first polyimide layer (32) between the first substrate (10) and the first polymer layer (31) and a second polyimide layer (42) between the second substrate (20) and the second polymer layer (41);
step S5, carrying out second UV light irradiation on the alignment film materials on the first substrate (10) and the second substrate (20) at a second wavelength, so that the first polyimide layer (32) and the second polyimide layer (42) are directionally arranged, and a first alignment film (30) and a second alignment film (40) on the first substrate (10) and the second substrate (20) are formed;
step S6, dropping liquid crystal (50) on the first substrate (10) or the second substrate (20), and forming a box by the first substrate (10) and the second substrate (20) in a pair mode to obtain the liquid crystal display panel, wherein the liquid crystal (50) in the liquid crystal display panel forms a preset pretilt angle along with the alignment of the first polyimide layer (41) and the second polyimide layer (42).
6. The method of manufacturing a liquid crystal display panel according to claim 5, wherein the first wavelength is 340 to 400nm, and the second wavelength is 250 to 320 nm.
7. The method of manufacturing a liquid crystal display panel according to claim 5, wherein the photosensitive reactive monomer has a structure represented by one of formulae 1 to 4:
wherein P represents a polymerizable group having a structure represented by one of formulae 5 to 7, n is equal to 1, 2, or 3;
l is one or more-CH of fluorine group, chlorine group, linear or branched alkyl with 5-20 carbon atoms, and linear or branched alkyl with 5-20 carbon atoms2A first group obtained by substituting a group with a phenyl group, a cycloalkyl group, -O-, -CONH-, -COO-, -O-CO-, -COO-or-CH ═ CH-group, or a second group obtained by substituting one or more hydrogen atoms in a linear or branched alkyl group having 5 to 20 carbon atoms or the first group with fluorine or chlorine atoms.
8. The method for manufacturing a liquid crystal display panel according to claim 5, wherein the photosensitive polyimide has a structure represented by formula 8:
wherein x is a positive integer.
9. The method of manufacturing a liquid crystal display panel according to claim 5, wherein the solvent is one or a combination of N-methylpyrrolidone, N-ethylpyrrolidine, γ -caprolactone, dimethylsulfoxide, and dichloromethane.
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| CN109143688A (en) | 2019-01-04 |
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