CN113419381B - Liquid crystal display panel and mobile terminal - Google Patents
Liquid crystal display panel and mobile terminal Download PDFInfo
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- CN113419381B CN113419381B CN202110632916.9A CN202110632916A CN113419381B CN 113419381 B CN113419381 B CN 113419381B CN 202110632916 A CN202110632916 A CN 202110632916A CN 113419381 B CN113419381 B CN 113419381B
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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
-
- 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
Abstract
The application provides a liquid crystal display panel and a mobile terminal. The liquid crystal display panel includes a first substrate, a second substrate and a liquid crystal mixture. The first substrate and the second substrate are oppositely arranged. The liquid crystal mixture is disposed between the first substrate and the second substrate. The alignment layer is arranged on the side of the first substrate and the second substrate facing the liquid crystal mixture. The liquid crystal mixture includes a liquid crystal, a polymer, and a photoinitiator. The surface of the alignment layer facing the liquid crystal mixture is curved. The surface of the alignment layer of the liquid crystal display panel is a curved surface, so that the flowability of a liquid crystal mixture can be improved, and the product yield of the liquid crystal display panel is further improved.
Description
Technical Field
The application relates to the field of display, in particular to a liquid crystal display panel and a mobile terminal.
Background
A liquid crystal display panel is a widely used flat panel display. Liquid crystals have a certain fluidity but have poor diffusibility. When the display size of the liquid crystal display panel is increased, bubbles are easily generated at the edge of the liquid crystal display panel, thereby affecting the product yield of the liquid crystal display panel.
Disclosure of Invention
The application provides a liquid crystal display panel and a mobile terminal to improve the product yield of the liquid crystal display panel and the mobile terminal.
The application provides a liquid crystal display panel, includes:
a first substrate;
a second substrate disposed opposite to the first substrate;
a liquid crystal mixture disposed between the first substrate and the second substrate, the liquid crystal mixture including a liquid crystal, a polymer, and a photoinitiator;
the alignment layer is arranged on one side, facing the liquid crystal mixture, of the first substrate and the second substrate, and the surface, facing the liquid crystal mixture, of the alignment layer is a curved surface.
In some embodiments, the surface of the alignment layer facing the liquid crystal mixture is provided with at least one protrusion and at least one groove.
In some embodiments, the contact angle between the liquid crystal and the alignment layer is 25 ° to 35 °.
In some embodiments, the alignment layer has a thickness of 60 nm to 150 nm.
In some embodiments, the roughness of the alignment layer is 0.6 nm to 0.75 nm.
In some embodiments, the alignment layer comprises the photoinitiator.
In some embodiments, the photoinitiator includes a first functional group and a second functional group, and a first radical formed by the first functional group and a second radical formed by the second functional group bond with the alignment layer to form the curved surface of the alignment layer.
In some embodiments, the photoinitiator is
One or two of them.
In some embodiments, the first functional group is-CH 3 Or
The first free radical is. CH 3 Or
The second functional group is
The second radical is
In some embodiments, the polymer comprises one or more of a polyacrylate, a polyacrylate derivative, a polymethacrylate, or a polymethacrylate derivative.
In some embodiments, the liquid crystal display panel further includes a conductive layer including a first sub-conductive layer disposed between the first substrate and the alignment layer on the first substrate and a second sub-conductive layer disposed between the second substrate and the alignment layer on the second substrate.
The application also provides a mobile terminal, the mobile terminal comprises a terminal main body and the liquid crystal display panel, and the liquid crystal display panel is arranged on the terminal main body.
The application provides a liquid crystal display panel and a mobile terminal. The liquid crystal display panel includes a first substrate, a second substrate, and a liquid crystal mixture. The first substrate and the second substrate are oppositely arranged. The liquid crystal mixture is disposed between the first substrate and the second substrate. The alignment layer is disposed on the first substrate and the second substrate on a side facing the liquid crystal mixture. The liquid crystal mixture includes a liquid crystal, a polymer, and a photoinitiator. The surface of the alignment layer facing the liquid crystal mixture is curved. The surface of the alignment layer of the liquid crystal display panel is a curved surface, so that the flowability of a liquid crystal mixture can be improved, and the product yield of the liquid crystal display panel is further improved.
Drawings
In order to more clearly illustrate the technical solutions in the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a liquid crystal display panel according to an embodiment of the present application.
Fig. 2 is a cross-sectional view of an lcd panel along line AA' according to an embodiment of the present disclosure.
Fig. 3 is a schematic diagram of a contact angle between a liquid crystal and an alignment layer according to an embodiment of the present disclosure.
Fig. 4 is a cross-sectional view of an lcd panel according to an embodiment of the present disclosure along line AA'.
Fig. 5 is a flowchart of a method for manufacturing a liquid crystal display panel according to an embodiment of the present application.
Fig. 6 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the numerical terms "first," "second," "third," and "fourth" used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The directional terms used in this application, such as upper, lower, left and right, are used solely in reference to the orientation of the appended drawings. Accordingly, the use of ordinal, directional and positional terms is to be taken as an illustration and understanding of the application and is not intended to limit the application. In the drawings, elements having similar structures are denoted by the same reference numerals.
The present application provides a liquid crystal display panel, and the present application will be described in detail with reference to specific embodiments.
Referring to fig. 1-2, fig. 1 is a schematic structural diagram of a liquid crystal display panel according to an embodiment of the present disclosure. Fig. 2 is a cross-sectional view of an lcd panel along line AA' according to an embodiment of the present disclosure.
The liquid crystal display panel 100 includes a first substrate 10, a second substrate 20, and a liquid crystal mixture 30. The first substrate 10 is disposed opposite to the second substrate 20. The liquid crystal mixture 30 is disposed between the first substrate 10 and the second substrate 20. The first substrate 10 and the second substrate 20 have an alignment layer 40 on the side facing the liquid crystal mixture 30. The alignment layer 40 includes a first sub-alignment layer 41 and a second sub-alignment layer 42. Wherein the first sub-alignment layer 41 is disposed on a side of the first substrate 10 facing the liquid crystal mixture 30. The second sub-alignment layer 42 is disposed on a side of the second substrate 20 facing the liquid crystal mixture 30. The liquid crystal mixture 30 includes a liquid crystal 31, a polymer 32, and a photoinitiator 33. The surface 40a of the alignment layer 40 is curved. The curved surface is used to diffuse the liquid crystal mixture 30.
Wherein the surface 40a of the alignment layer 40 facing the liquid crystal mixture 30 is provided with at least one protrusion 401 and at least one groove 402. The heights of any two protrusions 401 perpendicular to the alignment layer 40 may be the same or different. The depth of any two grooves 402 may be the same or different.
The liquid crystal display panel 100 further includes a conductive layer 50 and a sealant frame 60. The conductive layer 50 includes a first sub-conductive layer 51 and a second sub-conductive layer 52. Wherein the first sub-conductive layer 51 is located between the first substrate 10 and the first sub-alignment layer 41. The second sub-conductive layer 52 is positioned between the second substrate 20 and the second sub-alignment layer 42. The glue frame 60 is disposed between the first substrate 10 and the second substrate 20. The sealant frame 60 is used to support the first and second substrates 10 and 20 and seal the liquid crystal mixture 30.
The first substrate 10 may be a color filter substrate, and the second substrate 20 may be an array substrate. Alternatively, the first substrate 10 may be an array substrate, and the second substrate 20 may be a color filter substrate. The first substrate 10 and the second substrate 20 are not limited herein. For example, the first substrate 10 or the second substrate 20 may be a coa (color Filter on array) substrate.
The liquid crystal 31 has an elliptical shape with a major axis and a minor axis. The liquid crystal 31 is a negative liquid crystal. The liquid crystal molecules have anisotropy when ∈ || <ε ⊥ When it is a negative liquid crystal. The alignment layer 40 is mainly used to guide the liquid crystal 31 to be aligned. The pretilt angle of the liquid crystal 31 on the alignment layer 40 is 0.8 ° to 1.5 °. Specifically, the pretilt angle of the liquid crystal 31 on the alignment layer 40 may be 0.8 °, 0.9 °, 1.0 °, 1.1 °, 1.2 °, 1.3 °, 1.4 °, or 1.5 °. The pretilt angle refers to an included angle between a long axis of the liquid crystal molecules and a horizontal plane where the alignment layer is located.
The material of the alignment layer 40 includes one or both of Polyimide (PI) or polyimide acid. The alignment layer 40 may be formed by spin coating or doctor blading. The material of the alignment layer 40 is Polyimide (PI) for example.
The main chain structure of the Polyimide (PI) includes a side chain group. The pendant groups include one or both of double bonds or epoxy structures that can undergo free radical reactions. The structural formula of the Polyimide (PI) main chain is:
r in polyimide backbone 1 And R 2 The grafted side chain groups are selected from:
one kind of (1). Wherein the side chainA in the group is one of an ether group, a methylene group and an ester group. The value of n for the side chain groups is an integer between 5 and 20. In particular, the value of n for the side chain group may be 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20. The repeating units in the side chain group are straight-chain alkanes or branched alkanes. X is one of double bonds or epoxy structures which can carry out free radical reaction. And the number of X on the same side chain group is an integer between 1 and 4. In particular, the number of X on the same side chain group is 1, 2, 3 or 4.
Wherein, the structure of X includes:
The side chain groups in the Polyimide (PI) bond with the free radicals formed by the photoinitiator to form the curved surface of the alignment layer 40.
The surface 40a of the alignment layer 40 of the liquid crystal display panel 100 provided by the present application is a curved surface, which can improve the wettability of the liquid crystal mixture 30 on the surface of the alignment layer 40, thereby reducing the contact angle between the liquid crystal 31 and the alignment layer 40, improving the fluidity of the liquid crystal 31, being beneficial to reducing the bubbles at the edge of the liquid crystal display panel 100, and further improving the product yield of the liquid crystal display panel 100. The contact angle refers to the included angle from the solid-liquid interface to the gas-liquid interface through the liquid inside at the intersection of the solid, the liquid and the gas.
Referring to fig. 3, fig. 3 is a schematic view illustrating a contact angle between a liquid crystal and an alignment layer according to an embodiment of the present disclosure.
In some embodiments, the contact angle θ between the liquid crystal 31 and the alignment layer 40 is 25 ° to 35 °. Specifically, the contact angle θ between the liquid crystal 31 and the alignment layer 40 may be 25 °, 27 °, 30 °, 32 °, or 35 °.
For a conventional liquid crystal display panel, a contact angle between liquid crystal and an alignment layer is 50 ° to 70 °. The surface 40a of the alignment layer 40 of the liquid crystal display panel 100 provided by the present application is a curved surface, which can improve the wettability of the liquid crystal mixture 30 on the surface of the alignment layer 40, and reduce the contact angle between the liquid crystal 31 and the alignment layer 40, so that the contact angle between the liquid crystal 31 and the alignment layer 40 is 25 ° to 35 °. The contact angle between the liquid crystal 31 and the alignment layer 40 is reduced, which is beneficial to improving the fluidity of the liquid crystal 31 and reducing bubbles at the edge of the liquid crystal display panel 100, thereby improving the product yield of the liquid crystal display panel 100.
In some embodiments, the alignment layer 40 has a thickness of 60 nm to 150 nm. Specifically, the alignment layer 40 has a thickness of 60 nm, 70 nm, 80 nm, 90 nm, 100 nm, 110 nm, 120 nm, 130 nm, 140 nm, or 150 nm.
It is understood that when the thickness of the alignment layer 40 is too thick, it is not favorable for manufacturing a thin and light liquid crystal display panel. When the thickness of the alignment layer 40 is too thin, the ordered orientation of the liquid crystal 31 is not facilitated. By controlling the thickness of the alignment layer 40 to be 60 nm to 150 nm, the liquid crystal 31 can realize ordered orientation, which is beneficial to improving the product yield of the liquid crystal display panel 100.
In some embodiments, the roughness of the alignment layer 40 is 0.6 to 0.75 nanometers. Specifically, the roughness of the alignment layer 40 may be 0.6 nm, 0.62 nm, 0.65 nm, 0.68 nm, 0.7 nm, 0.72 nm, or 0.75 nm. Surface Roughness (RMS) refers to the small pitch and small peak-to-valley unevenness of the machined surface. The distance (wave distance) between two wave crests or two wave troughs is very small (below 1 mm), belonging to microscopic geometric shape errors. The smaller the surface roughness, the smoother the surface.
The surface 40a of the alignment layer 40 of the liquid crystal display panel 100 provided by the present application is a curved surface, which increases the roughness of the alignment layer 40, so that the roughness of the alignment layer 40 is 0.6 nm to 0.75 nm. The roughness of the alignment layer 40 is increased, which is beneficial to improving the diffusivity of the liquid crystal 31 and reducing the bubbles at the edge of the liquid crystal display panel 100, thereby improving the product yield of the liquid crystal display panel 100.
In some embodiments, alignment layer 40 includes photoinitiator 33.
In the present embodiment, the photoinitiator 33 is included not only in the liquid crystal mixture 30 but also in the alignment layer 40. The photoinitiator 33 comprises
One or two of them.
This application is through adding photoinitiator 33 to alignment layer 40 in, is favorable to alignment layer 40's surface 40a to form the curved surface, is favorable to improving liquid crystal mixture 30's mobility, is favorable to reducing the edge bubble that appears of liquid crystal display panel 100, and then has improved liquid crystal display panel 100's product yield.
In some embodiments, the photoinitiator 33 may be
One or two of them.
In some embodiments, the photoinitiator 33 includes a first functional group and a second functional group, and a first radical formed by the first functional group and a second radical formed by the second functional group bond with the alignment layer 40 to form the curved surface of the alignment layer 40.
In some embodiments, the first functional group is-CH 3 Or
The first radical being. CH 3 Or
The second functional group is
The second radical is
Wherein the uv-induced photoinitiator 33 decomposes to form free radicals. The wavelength of the ultraviolet light is 250 nm to 400 nm. The irradiation time is 50 seconds to 200 seconds. The illumination intensity is 60mW/cm 2 To 100mW/cm 2 。
Wherein, ultraviolet rayThe light may be monochromatic or composite. When the ultraviolet light is monochromatic, the wavelength of the ultraviolet light may be 250 nm, 300 nm, 350 nm, 365 nm, 380 nm, or 400 nm. When the ultraviolet light is a composite light, the wavelength of the ultraviolet light may be 250 nm to 350 nm, 313 nm to 365 nm, or 365 nm to 400 nm. The time of the ultraviolet light irradiation may be 50 seconds, 80 seconds, 100 seconds, 120 seconds, 150 seconds, 180 seconds, or 200 seconds. The illumination of the ultraviolet light can be 60mW/cm 2 、70mW/cm 2 、80mW/cm 2 、90mW/cm 2 Or 100mW/cm 2 。
In particular, photoinitiators
Under the action of ultraviolet light, the following reactions occur:
photoinitiator
Radicals formed by decomposition CH 3 Or
One or both of which are bonded to side chain groups of the Polyimide (PI) to form a curved surface of the alignment layer 40. Photoinitiator
Carbon dioxide is also formed by the decomposition. The surface of the alignment layer 40 becomes rough and has wrinkles due to the evaporation and diffusion of carbon dioxide, so that the surface 40a of the alignment layer 40 is a curved surface.
In particular, photoinitiators
Under the action of ultraviolet light, the following reactions occur:
photoinitiator
Free radicals formed by decomposition
One or both of which are bonded to side chain groups of the Polyimide (PI) to form a curved surface of the alignment layer 40. Photoinitiator
Carbon dioxide is also formed by the decomposition. The surface of the alignment layer 40 becomes rough and has wrinkles due to the evaporation and diffusion of carbon dioxide, so that the surface 40a of the alignment layer 40 is a curved surface.
The present application also provides a synthetic photoinitiator 33
The reaction formula (II) and the process.
Wherein, a photoinitiator is synthesized
The reaction formula (A) is as follows:
specifically, cyclohexanone-oxime and acetic anhydride with certain mass are taken to react in a yellow light environment. Wherein the mass ratio of cyclohexanone oxime to acetic anhydride is 1: 1.1. the reaction temperature is 40 to 70 degrees celsius. The reaction time is 10 to 12 hours. Specifically, the reaction temperature may be 40 degrees celsius, 50 degrees celsius, 60 degrees celsius, or 70 degrees celsius. Specifically, the reaction time may be 10 hours, 11 hours, or 12 hours.
Wherein, a photoinitiator is synthesized
The reaction formula (A) is as follows:
specifically, a certain mass of cyclohexanone-oxime and maleic anhydride are taken to react in a yellow light environment. Wherein the mass ratio of cyclohexanone oxime to acetic anhydride is 1: 1.1. the reaction temperature is 40 to 70 degrees celsius. The reaction time is 10 to 12 hours. Specifically, the reaction temperature may be 40 degrees celsius, 50 degrees celsius, 60 degrees celsius, or 70 degrees celsius. Specifically, the reaction time may be 10 hours, 11 hours, or 12 hours.
Referring to fig. 2 and 4, fig. 4 is a cross-sectional view of the liquid crystal display panel according to the embodiment of the present invention at the AA' line before the ultraviolet light is irradiated.
In some embodiments of the present application, the polymer 32 in the liquid crystal mixture 30 is one or more of a polyacrylate, a polyacrylate derivative, a polymethacrylate, or a polymethacrylate derivative.
Wherein the reactive monomer 321 polymerizes to form the polymer 32. The mass ratio of the photoinitiator 33 to the reactive monomer 321 is (2-6): 100. specifically, the mass ratio between the photoinitiator 33 and the reactive monomer 321 may be 2: 100. 3: 100. 4: 100. 5: 100 or 6: 100.
it is understood that, the present application is realized by controlling the mass ratio between the photoinitiator 33 and the reactive monomer 321 to be (2-6): 100, the reaction of the reactive monomer 321 can be ensured to be complete. It should also be understood that the photoinitiator 33 may remain after the reaction with the reactive monomer 321 is complete.
In some embodiments, reactive monomers 321 include one or more of an acrylate, an acrylate derivative, a methacrylate, or a methacrylate derivative.
Specifically, the reactive monomers may be:
it will be appreciated that acrylates, acrylate derivatives, methacrylates or methacrylate derivatives having a reactive end group may be used as reactive monomers.
Referring to fig. 5, fig. 5 is a flowchart illustrating a method for manufacturing a liquid crystal display panel according to an embodiment of the present disclosure.
The application also provides a preparation method of the liquid crystal display panel. The preparation method of the liquid crystal display panel comprises the following steps:
step B10: a first substrate and a second substrate are provided.
The first substrate may be an array substrate, and the second substrate may be a color film substrate. Or the first substrate may be a color film substrate, and the second substrate may be an array substrate, and the first substrate and the second substrate are not limited herein. For example, the first substrate or the second substrate may be a coa (color Filter on array) substrate.
Step B20: and forming an alignment layer on one side of the first substrate and the second substrate, and oppositely arranging the side of the first substrate and the side of the second substrate with the alignment layer.
Wherein, the thickness of the alignment layer 40 is 60 nm to 150 nm. Specifically, the alignment layer 40 has a thickness of 60 nm, 70 nm, 80 nm, 90 nm, 100 nm, 110 nm, 120 nm, 130 nm, 140 nm, or 150 nm. The material of the alignment layer includes one or both of polyimide or polyimide acid. The alignment layer may be formed by spin coating or doctor blading.
The main chain structure of the Polyimide (PI) includes a side chain group. The pendant groups include one or both of double bonds or epoxy structures that can undergo free radical reactions. The structural formula of the Polyimide (PI) main chain is:
r of polyimide main chain 1 And R 2 The grafted side chain groups are selected from:
one kind of (1). Wherein, A in the side chain group is one of an ether group, a methylene group and an ester group. The value of n for the side chain groups is an integer between 5 and 20. In particular, the value of n for the side chain group may be 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20. The repeating units in the side chain group are straight-chain alkanes or branched alkanes. X is one of double bonds or epoxy structures which can carry out free radical reaction. And the number of X on the same side chain group is an integer between 1 and 4. In particular, the number of X on the same side chain group is 1, 2, 3 or 4.
Wherein the structure of X is selected from:
Step B30: and filling a liquid crystal mixture between the first substrate and the second substrate, wherein the liquid crystal mixture comprises liquid crystal, a reaction monomer and a photoinitiator.
Wherein, the liquid crystal is negative liquid crystal. The reactive monomer comprises one or more of acrylate, acrylate derivative, methacrylate or methacrylate derivative.
Specifically, the reactive monomers may be:
It will be appreciated that acrylates, acrylate derivatives, methacrylates or methacrylate derivatives having a reactive end group may be used as reactive monomers. The photoinitiator comprises
One or two of them.
Step B40: a curved surface is formed on the side of the alignment layer facing the liquid crystal mixture, and the liquid crystal mixture comprises liquid crystal, reactive monomer, polymer and photoinitiator.
It is understood that ultraviolet light induces the photoinitiator to decompose to form free radicals and carbon dioxide. The free radicals are bonded with the alignment layer to form a curved surface of the alignment layer. In addition, due to the evaporation and diffusion of carbon dioxide, the surface of the alignment layer becomes rough and has wrinkles, and the alignment layer also forms a curved surface. Wherein the ultraviolet wavelength is 250-400 nm, the irradiation time is 50-200 s, and the illumination intensity is 60mW/cm 2 To 100mW/cm 2 . So that the ultraviolet irradiation of the alignment layer forming the curved surface is the first ultraviolet irradiation. The first irradiation of ultraviolet light can also cause the liquid crystal to form a pretilt angle.
Wherein, the ultraviolet light can be monochromatic light or composite light. When the ultraviolet light is monochromatic, the wavelength of the ultraviolet light may be 250 nm, 300 nm, 350 nm, 365 nm, 380 nm, or 400 nm. When the ultraviolet light is a composite light, the wavelength of the ultraviolet light may be 250 nm to 350 nm, 313 nm to 365 nm, or 365 nm to 400 nm. The time of the ultraviolet light irradiation may be 50 seconds, 80 seconds, 100 seconds, 120 seconds, 150 seconds, 180 seconds, or 200 seconds. The illumination of the ultraviolet light can be 60mW/cm 2 、70mW/cm 2 、80mW/cm 2 、90mW/cm 2 Or 100mW/cm 2 。
The ultraviolet light irradiation further comprises a second ultraviolet light irradiation. The second time of ultraviolet irradiation is 10 minutes to 30 minutes. Specifically, the second uv irradiation time is 10 minutes, 15 minutes, 20 minutes, 25 minutes, or 30 minutes. The second exposure to ultraviolet light can polymerize the reactive monomers to form a polymer. The wavelength and the illumination intensity of the first ultraviolet irradiation and the second ultraviolet irradiation can be the same or different.
The liquid crystal display panel has the curved surface, the liquidity of a liquid crystal mixture can be improved, and the product yield of the liquid crystal display panel is further improved.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application.
The mobile terminal 1000 includes a terminal body 200 and a liquid crystal display panel 100 as described in any of the previous embodiments. The liquid crystal display panel 100 is disposed on the terminal body 200. Mobile terminal 1000 can be a rollable or foldable cell phone, watch, bracelet, television or other wearable display or touch-control electronic device, as well as a flexible smart phone, tablet computer, laptop computer, desktop display, television, smart glasses, smart watch, ATM machine, digital camera, in-vehicle display, medical display, industrial display, e-book, electrophoretic display device, game console, transparent display, dual-sided display, naked-eye 3D display, mirror display device, semi-reflective and semi-transparent display device, or flexible touch screen, etc.
The liquid crystal display panel, the mobile terminal and the display device have the curved surfaces, the flowability of a liquid crystal mixture can be improved, and the product yield of the liquid crystal display panel and the mobile terminal is further improved.
In summary, although the embodiments of the present application are described in detail above, the above-mentioned embodiments are not intended to limit the present application, and it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.
Claims (10)
1. A liquid crystal display panel, comprising:
a first substrate;
a second substrate disposed opposite to the first substrate;
a liquid crystal mixture disposed between the first substrate and the second substrate, the liquid crystal mixture including a liquid crystal, a polymer, and a photoinitiator;
the alignment layer is arranged on one sides, facing the liquid crystal mixture, of the first substrate and the second substrate, and the surface, facing the liquid crystal mixture, of the alignment layer is a curved surface;
wherein the photoinitiator comprises a first functional group and a second functional group, and a first free radical formed by the first functional group and a second free radical formed by the second functional group are bonded with the alignment layer to form a curved surface of the alignment layer;
the photoinitiator is
One or two of them.
2. The liquid crystal display panel of claim 1, wherein the surface of the alignment layer facing the liquid crystal mixture is provided with at least one protrusion and at least one groove.
3. The liquid crystal display panel of claim 1, wherein a contact angle between the liquid crystal and the alignment layer is 25 ° to 35 °.
4. The lcd panel of claim 1, wherein the alignment layer has a thickness of 60 nm to 150 nm.
5. The lcd panel of claim 1, wherein the alignment layer has a roughness of 0.6 nm to 0.75 nm.
6. The liquid crystal display panel of claim 1, wherein the alignment layer comprises the photoinitiator.
7. The liquid crystal display panel according to claim 1, wherein the first functional group is-CH 3 Or
The first free radical is. CH 3 Or
The second functional group is
The second radical is
8. The liquid crystal display panel of claim 1, wherein the polymer comprises one or more of a polyacrylate, a polyacrylate derivative, a polymethacrylate, or a polymethacrylate derivative.
9. The liquid crystal display panel according to claim 1, further comprising a conductive layer including a first sub-conductive layer and a second sub-conductive layer, the first sub-conductive layer being disposed between the first substrate and the alignment layer on the first substrate, the second sub-conductive layer being disposed between the second substrate and the alignment layer on the second substrate.
10. A mobile terminal, characterized in that the mobile terminal comprises a terminal body and a liquid crystal display panel according to any one of claims 1 to 9, the liquid crystal display panel being disposed on the terminal body.
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| JP2002244138A (en) * | 2001-02-16 | 2002-08-28 | Science Univ Of Tokyo | Method for manufacturing liquid crystal display element having high contrast ratio |
| CN102472923A (en) * | 2009-07-08 | 2012-05-23 | 夏普株式会社 | Liquid crystal display panel and process for production thereof |
| CN103163687A (en) * | 2011-12-15 | 2013-06-19 | 群康科技(深圳)有限公司 | Display panel, manufacturing method thereof and image display system |
| CN105733608A (en) * | 2016-04-22 | 2016-07-06 | 深圳市华星光电技术有限公司 | Liquid crystal material, making method of liquid crystal display panel and liquid crystal display panel |
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| JP5198580B2 (en) * | 2008-11-27 | 2013-05-15 | シャープ株式会社 | Alignment film, liquid crystal display device having alignment film, and method of forming alignment film |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002244138A (en) * | 2001-02-16 | 2002-08-28 | Science Univ Of Tokyo | Method for manufacturing liquid crystal display element having high contrast ratio |
| CN102472923A (en) * | 2009-07-08 | 2012-05-23 | 夏普株式会社 | Liquid crystal display panel and process for production thereof |
| CN103163687A (en) * | 2011-12-15 | 2013-06-19 | 群康科技(深圳)有限公司 | Display panel, manufacturing method thereof and image display system |
| CN105733608A (en) * | 2016-04-22 | 2016-07-06 | 深圳市华星光电技术有限公司 | Liquid crystal material, making method of liquid crystal display panel and liquid crystal display panel |
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