CN112285965B - Liquid crystal display panel and method for manufacturing the same - Google Patents
Liquid crystal display panel and method for manufacturing the same Download PDFInfo
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- CN112285965B CN112285965B CN202011217709.9A CN202011217709A CN112285965B CN 112285965 B CN112285965 B CN 112285965B CN 202011217709 A CN202011217709 A CN 202011217709A CN 112285965 B CN112285965 B CN 112285965B
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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
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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
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
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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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
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Abstract
The application provides a liquid crystal display panel and a manufacturing method thereof. The liquid crystal display panel comprises a first substrate and a second substrate which are oppositely arranged and a liquid crystal layer positioned between the first substrate and the second substrate. The first substrate comprises a first alignment substrate and a first display function layer arranged on one side, far away from the liquid crystal layer, of the first alignment substrate. The first alignment substrate comprises a first alignment layer close to one side of the liquid crystal layer and a first substrate layer far away from one side of the liquid crystal layer. The second substrate comprises a second alignment substrate and a second display function layer arranged on one side, far away from the liquid crystal layer, of the second alignment substrate. The second alignment substrate comprises a second alignment layer close to one side of the liquid crystal layer and a second substrate layer far away from one side of the liquid crystal layer.
Description
Technical Field
The present disclosure relates to display technologies, and particularly to a liquid crystal display panel and a method for manufacturing the same.
Background
Currently, flexible organic light emitting diode displays have been circulated in the market. However, since the yield is low and the manufacturing cost is high, it has not been widely used for a while. Although the manufacturing process of the liquid crystal display is mature, the curvature is limited when the liquid crystal display is bent due to the use of the glass substrate, and flexible display cannot be realized. If a flexible organic substrate is used instead of a glass substrate in a liquid crystal display to manufacture a flexible liquid crystal display, the flexible organic substrate cannot withstand a high temperature process, such as an Excimer Laser Annealing (ELA) process. Therefore, it is difficult to provide a liquid crystal display device having flexibility that can break through curvature limitation.
Disclosure of Invention
In view of the above, the present disclosure is directed to a flexible liquid crystal display panel capable of breaking curvature limitation and a method for manufacturing the same.
The application provides a liquid crystal display panel, which comprises a first substrate and a second substrate which are oppositely arranged and a liquid crystal layer positioned between the first substrate and the second substrate, wherein,
the first substrate comprises a first alignment substrate and a first display function layer arranged on one side, far away from the liquid crystal layer, of the first alignment substrate, and the first alignment substrate comprises a first alignment layer close to one side of the liquid crystal layer and a first substrate layer far away from one side of the liquid crystal layer;
the second base plate comprises a second alignment substrate and a second display function layer arranged on one side, far away from the liquid crystal layer, of the second alignment substrate, and the second alignment substrate comprises a second alignment layer close to one side of the liquid crystal layer and a second substrate layer far away from one side of the liquid crystal layer.
In one embodiment, the thickness of the first alignment substrate and/or the second alignment substrate is 0.05 mm to 0.4 mm.
In one embodiment, the material of the first alignment layer comprises polyimide and the material of the first substrate layer comprises polyamic acid comprising a benzene ring.
In one embodiment, the material of the second alignment layer comprises polyimide and the material of the second substrate layer comprises polyamic acid containing a benzene ring.
In one embodiment, the polyamic acid containing a benzene ring comprises one or more combinations of a biphenyl type polyamic acid and a pyromellitic type polyamic acid.
In one embodiment, the first display function layer includes a thin film transistor, and the thin film transistor is a low temperature polysilicon thin film transistor.
The application also provides a manufacturing method of the liquid crystal display panel, which comprises the following steps:
providing a first glass substrate, and forming a first display function layer on the first glass substrate;
coating a first mixed material containing a first alignment material and a first substrate material on the first display functional layer, and precuring and curing the first mixed material to layer the first alignment material and the first substrate material, wherein the first alignment material forms a first alignment layer, the first substrate material forms a first substrate layer, and a first alignment substrate is obtained, so that a first substrate is obtained;
providing a second glass substrate, and forming a second display function layer on the second glass substrate;
coating a second mixed material containing a second alignment material and a second substrate material on the second display function layer, and pre-curing and curing the second mixed material to layer the second alignment material and the second substrate material, wherein the second alignment material forms a second alignment layer, the second substrate material forms a second substrate layer, and a second alignment substrate is obtained, so that a second substrate is obtained;
injecting liquid crystal between the first substrate and the second substrate and assembling the liquid crystal into a liquid crystal box; and
removing the first glass substrate and the second glass substrate in the liquid crystal cell.
In one embodiment, the step of removing the first glass substrate and the second glass substrate in the liquid crystal cell comprises:
immersing the liquid crystal cell in hydrofluoric acid to remove the first glass substrate and the second glass substrate; or
And heating the liquid crystal box to enable the first glass substrate to be peeled from the first alignment substrate, and the second glass substrate to be peeled from the second alignment substrate.
In one embodiment, the first alignment material comprises polyamide and the first substrate material comprises polyamic acid comprising a benzene ring.
In one embodiment, the second alignment material comprises polyamide and the second substrate material comprises polyamic acid comprising a benzene ring.
The alignment film of the liquid crystal display panel comprises two parts, wherein one part is used as a substrate carrier, and the other part is used for liquid crystal alignment, so that a glass substrate in the existing liquid crystal display is omitted, and the liquid crystal display panel capable of being bent with large curvature is realized.
According to the manufacturing method of the liquid crystal display panel, the film layer manufacturing process of the array substrate and the color film substrate, particularly the high-temperature manufacturing process such as ELA (electro-luminescent array) is completed on the glass substrate to form the film layer structures of the array substrate and the color film substrate, the alignment film capable of being used as the supporting layer is formed in the alignment film manufacturing process, the glass substrate is removed in an etching or heating mode after the box is formed, other film layers are supported by the alignment film, curvature limitation of liquid crystal display can be broken through, and flexible liquid crystal display is achieved.
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 provided in the present application.
Fig. 2 is a flowchart of a method for manufacturing a liquid crystal display panel according to the present application.
Fig. 3(a) to 3(i) are schematic views illustrating steps of a method for manufacturing a liquid crystal display panel according to the present application.
Detailed Description
The technical solution in the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step based on the embodiments in the present application, are within the scope of protection of the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being directly adjacent or may comprise the first and second features being not in direct contact but in contact with each other by means of further features between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1, the present application provides a liquid crystal display panel 100, which may be used for one of a smart phone (smartphone), a tablet personal computer (tablet personal computer), a mobile phone (mobile phone), a video phone, an electronic book reader (e-book reader), a desktop computer (desktop PC), a laptop PC (laptop PC), a netbook computer, a workstation (workstation), a server, a personal digital assistant (personal digital assistant), a portable media player (portable multimedia player), an MP3 player, a mobile medical machine, a camera, a game machine, a digital camera, a car navigation device, an electronic billboard, an automatic teller machine, or a wearable device (wearable device), for example.
The liquid crystal display panel 100 includes a first substrate 10, a second substrate 20, and a liquid crystal layer 30 disposed between the first substrate 10 and the second substrate 20. It is understood that the liquid crystal display panel 100 further includes a sealant 40 disposed between the first substrate 10 and the second substrate 20 for sealing the liquid crystal layer 30.
The present application does not limit the types of the first and second substrates 10 and 20. In this embodiment, the first substrate 10 is an array substrate, and the second substrate 20 is a color filter substrate. In other embodiments of the present disclosure, the first substrate 10 and the second substrate 20 may be a coa (color filter on array) type array substrate and an opposite substrate, respectively.
Specifically, the first substrate 10 includes a first alignment substrate 11 and a first display functional layer 12 disposed on a side of the first alignment substrate 11 away from the liquid crystal layer 30. The first alignment substrate 11 comprises a first alignment layer 111 on the side close to the liquid crystal layer 30 and a first substrate layer 112 on the side remote from the liquid crystal layer 30. The first alignment layer 111 functions to align liquid crystals in the liquid crystal layer 30. The first substrate layer 112 supports the first display functional layer 12.
In one embodiment, the thickness h1 of the first alignment substrate 11 is 0.05 mm to 0.4 mm, so that the first alignment substrate 11 has sufficient supporting capability. The thickness h11 of the first alignment layer 111 ranges from 300 angstroms to 700 angstroms. When the thickness h11 of the first alignment layer 111 is within this range, the mechanical strength and alignment ability of the first alignment substrate 11 can be well balanced. In one embodiment, the thickness h11 of the first alignment layer 111 may be 400 to 600 angstroms. In one embodiment, the thickness h11 of the first alignment layer 111 may be 500 angstroms.
In one embodiment, the material of the first alignment layer 111 includes polyimide, and the material of the first substrate layer 112 includes polyamic acid including a benzene ring. The polyamic acid containing a benzene ring includes one or a combination of two or more of biphenyl type polyamic acid and pyromellitic type polyamic acid.
The first display functional layer 12 includes a thin film transistor 121, a planarization layer 122, a Back electrode (Back ITO, BITO)123, a passivation layer 124, and a Top electrode (Top ITO, TITO)125, which are sequentially stacked in a direction away from the first alignment substrate 11 toward close to the first alignment substrate 11.
The thin film transistor 121 includes a light shielding layer LS stacked in a direction away from the first alignment substrate 11 toward a direction close to the first alignment substrate 11, a buffer layer BL covering the light shielding layer LS, an active layer CL on the buffer layer BL, a gate insulating layer GI covering the active layer CL, a gate electrode GE on the gate insulating layer GI, an interlayer dielectric layer IL covering the gate insulating layer GI and the gate electrode GE, and a source electrode SE and a drain electrode DE on the interlayer dielectric layer. The active layer CL may further include a channel region and source and drain regions at both sides of the channel region. The source electrode SE and the drain electrode DE are respectively electrically connected with the source electrode region and the drain electrode region.
The planarization layer 122 covers the thin film transistor 121. The back electrode 123 is disposed on the planarization layer 122. The passivation layer 124 covers the back electrode 123. The top electrode 125 is disposed on the passivation layer 124 and electrically connected to the drain electrode DE of the thin film transistor 121 through a via hole opened in the passivation layer 124 and the planarization layer 122. The back electrode 123 is a common electrode. The top electrode 125 is a pixel electrode.
Although the present embodiment discloses a horizontal electric Field type liquid crystal display panel, the present application does not limit the type of the liquid crystal display panel 100, and the liquid crystal display panel may be a horizontal electric Field type liquid crystal display panel, such as a Fringe Field Switching (FFS) type liquid crystal display panel or an In-Plane Switching (IPS) type liquid crystal display panel, or a Vertical electric Field type liquid crystal display panel, such as a Twisted Nematic (TN) type liquid crystal display panel or a Multi-domain Vertical Alignment (MVA) type liquid crystal display panel.
In one embodiment, the thin film transistor 121 is a low temperature polysilicon thin film transistor. That is, the material of the active layer CL may be low temperature polysilicon, for example, N-type doped low temperature polysilicon. The polycrystalline silicon thin film transistor may be manufactured by an Excimer Laser Annealing (ELA) process.
In other embodiments, the active layer CL may be made of metal oxides such as Indium Gallium Zinc Oxide (IGZO), Indium Gallium Zinc Tin Oxide (IGZTO), Indium Zinc Oxide (IZO), gallium indium oxide (IGO), Indium Gallium Tin Oxide (IGTO), Indium Zinc Tin Oxide (IZTO), and Indium Tin Oxide (ITO).
The second substrate 20 includes a second alignment substrate 21 and a second display function layer 22 disposed on a side of the second alignment substrate 21 away from the liquid crystal layer 30. The second alignment substrate 21 comprises a second alignment layer 211 close to the liquid crystal layer 30 and a second substrate layer 212 on the side remote from the liquid crystal layer 30. The second alignment layer 211 functions to align liquid crystals in the liquid crystal layer 30. The second substrate layer 212 supports the second display functional layer 22. The second display functional layer 22 may include a color film layer or the like.
In one embodiment, the thickness h2 of the second alignment substrate 21 is 0.05 mm to 0.4 mm, so that the second alignment substrate 21 has sufficient supporting capability. The thickness h21 of the second alignment layer 211 ranges from 300 angstroms to 700 angstroms. When the thickness h21 of the second alignment layer 211 is within this range, the mechanical strength and alignment ability of the second alignment layer 211 can be well balanced. In one embodiment, the thickness h21 of the second alignment layer 211 may be 400 to 600 angstroms. In one embodiment, the thickness h21 of the second alignment layer 211 may be 500 angstroms.
In one embodiment, the material of the second alignment layer 211 includes polyimide. The material of the second substrate layer 212 includes polyamic acid containing a benzene ring. The polyamic acid containing a benzene ring includes one or a combination of two or more of biphenyl type polyamic acid and pyromellitic type polyamic acid.
The application provides a liquid crystal display panel includes first base plate and second base plate and is located first base plate with liquid crystal layer between the second base plate, wherein, first base plate include first to join in marriage the substrate and set up in first to join in marriage the substrate and keep away from the first demonstration functional layer of liquid crystal layer one side, first to join in marriage the substrate and include and be close to the first layer of lining of liquid crystal layer one side is joined in marriage to the layer and is kept away from the first substrate layer of liquid crystal layer one side, the second base plate include the second join in marriage to the substrate and set up in the second is joined in marriage the substrate and is kept away from the second of liquid crystal layer one side and shows the functional layer, the second is joined in marriage the substrate and is included and is close to the second of liquid crystal layer one side is joined in marriage the layer and is kept away from the second substrate layer of liquid crystal layer one side. The alignment film comprises two parts, one part is used as a substrate carrier, and the other part is used for liquid crystal alignment, so that a glass substrate in the conventional liquid crystal display is omitted, and the liquid crystal display panel capable of being bent with large curvature is realized.
Referring to fig. 2, the present application further provides a method for manufacturing a liquid crystal display panel, which includes the following steps:
s1: a first glass substrate 200 is provided, and a first display function layer 12 is formed on the first glass substrate 200.
Referring to fig. 3(a) and fig. 1 together, the first glass substrate 200 may be a transparent glass substrate commonly used in the art. The step of forming the first display functional layer 12 on the first glass substrate 200 includes sequentially forming a thin film transistor 121, a planarization layer 122, a Back electrode (Back ITO, BITO)123, a passivation layer 124, and a Top electrode (Top ITO, TITO)125 on the first glass substrate 200. The step of forming the thin film transistor 121 includes sequentially forming a light-shielding layer LS, a buffer layer BL covering the light-shielding layer LS, an active layer CL on the buffer layer BL, a gate insulating layer GI covering the active layer CL, a gate electrode GE on the gate insulating layer GI, an interlayer dielectric layer IL covering the gate insulating layer GI and the gate electrode GE, and a source electrode SE and a drain electrode DE on the interlayer dielectric layer on the first glass substrate 200. The active layer CL may further include a channel region and source and drain regions at both sides of the channel region. The source electrode SE and the drain electrode DE are respectively electrically connected with the source electrode region and the drain electrode region.
The planarization layer 122 covers the thin film transistor 121. The back electrode 123 is disposed on the planarization layer 122. The passivation layer 124 covers the back electrode 123. The top electrode 125 is disposed on the passivation layer 124 and electrically connected to the drain electrode DE of the thin film transistor 121 through a via hole opened in the passivation layer 124 and the planarization layer 122. The back electrode 123 is a common electrode. The top electrode 125 is a pixel electrode.
Although the present embodiment discloses a horizontal electric Field type liquid crystal display panel, the present application does not limit the type of the liquid crystal display panel 100, and the liquid crystal display panel may be a horizontal electric Field type liquid crystal display panel, such as a Fringe Field Switching (FFS) type liquid crystal display panel or an In-Plane Switching (IPS) type liquid crystal display panel, or a Vertical electric Field type liquid crystal display panel, such as a Twisted Nematic (TN) type liquid crystal display panel or a Multi-domain Vertical Alignment (MVA) type liquid crystal display panel.
In one embodiment, the thin film transistor 121 is a low temperature polysilicon thin film transistor. That is, the material of the active layer CL may be low temperature polysilicon, for example, N-type doped low temperature polysilicon. The polycrystalline silicon thin film transistor may be manufactured by an Excimer Laser Annealing (ELA) process.
In other embodiments, the active layer CL may be made of metal oxides such as Indium Gallium Zinc Oxide (IGZO), Indium Gallium Zinc Tin Oxide (IGZTO), Indium Zinc Oxide (IZO), gallium indium oxide (IGO), Indium Gallium Tin Oxide (IGTO), Indium Zinc Tin Oxide (IZTO), and Indium Tin Oxide (ITO).
S2: a first mixture 300 comprising a first alignment material and a first substrate material is coated on the first display functional layer 12, and the first mixture 300 is precured and cured to delaminate the first alignment material from the first substrate material, the first alignment material forming the first alignment layer 111 and the first substrate material forming the first substrate layer 112, resulting in the first alignment substrate 11, thereby obtaining the first base plate 10.
The first alignment layer 111 functions to align liquid crystals in the liquid crystal layer 30. The first substrate layer 112 supports the first display functional layer 12. Referring to fig. 3(b) to 3(c) and fig. 1, in one embodiment, the thickness h1 of the first alignment substrate 11 is 0.05 mm to 0.4 mm, so that the first alignment substrate 11 has sufficient supporting capability. The thickness h11 of the first alignment layer 111 ranges from 300 angstroms to 700 angstroms. When the thickness h11 of the first alignment layer 111 is within this range, the mechanical strength and alignment ability of the first alignment substrate 11 can be well balanced. In one embodiment, the thickness h11 of the first alignment layer 111 may be 400 to 600 angstroms. In one embodiment, the thickness h11 of the first alignment layer 111 may be 500 angstroms. In one embodiment, the first alignment material comprises polyamide (SPI) and the first substrate material comprises polyamic acid (PAA) comprising a benzene ring. The first mixture 300 is a Hybrid (Hybrid) type polyimide precursor. The polyamic acid containing a benzene ring includes one or a combination of two or more of biphenyl type polyamic acid and pyromellitic type polyamic acid. The solvent of the mixture 300 of the first alignment material and the first substrate material may use a combination of one or more of Dimethylacetamide (DMA), N-methylpyrrolidone (NMP), gamma-butyrolactone (GBL), and ethylene glycol monobutyl ether (BC).
Specifically, the first mixture 300 is uniformly coated on the first glass substrate 200 to form a thin film of the first mixture 300, and the coating method may be transfer printing using a printing plate. The coating area depends on the product design. The film thickness is determined depending on the selected polyimide precursor material, the discharge volume, and the printing mesh size. The temperature is raised to volatilize the solvent therein (precure). Again, the temperature is raised to a higher temperature (cure) and the heated polyamic acid and polyamide film form and delaminate. The polyamic acid (PAA) undergoes imidization and is dehydrated to form polyimide. The polyimide has a stable pretilt angle and a high voltage holding ratio, and can meet the requirements of liquid crystal alignment, charge release and ion isolation. The polyamide (SPI) film containing benzene ring has macromolecular rigid structure, excellent mechanical performance, substrate adsorption and low residual DC voltage.
It is to be understood that the present application is not limited to the kinds of the first alignment material and the first substrate material, and any material and system capable of performing both the alignment function and the substrate function may be used in the present application.
S3: a second glass substrate 400 is provided and the second display functional layer 22 is formed on the second glass substrate 400.
Referring to fig. 3(d) and fig. 1, the second glass substrate 400 may be a transparent glass substrate commonly used in the art. The step of forming the second display function layer 22 on the second glass substrate 400 may include forming a color film layer and the like on the second glass substrate 400 by exposure, development and etching.
S4: a second mixture 500 comprising a second alignment material and a second substrate material is coated on the second display functional layer 22, and the second mixture 500 is pre-cured and cured to delaminate the second alignment material from the second substrate material, the second alignment material forming a second alignment layer 211, the second substrate material forming a second substrate layer 212, resulting in a second alignment substrate 21, thereby obtaining a second base plate 20.
The second alignment layer 211 functions to align liquid crystals in the liquid crystal layer 30. The second substrate layer 212 supports the second display functional layer 22. Referring to fig. 3(e) to 3(f) and fig. 1, in one embodiment, the thickness h2 of the second alignment substrate 21 is 0.05 mm to 0.4 mm, so that the second alignment substrate 21 has sufficient supporting capability. The thickness h21 of the second alignment layer 211 ranges from 300 angstroms to 700 angstroms. When the thickness h21 of the second alignment layer 211 is within this range, the mechanical strength and alignment ability of the second alignment layer 211 can be well balanced. In one embodiment, the thickness h21 of the second alignment layer 211 may be 400 to 600 angstroms. In one embodiment, the thickness h21 of the second alignment layer 211 may be 500 angstroms. In one embodiment, the second alignment material comprises polyamide (SPI) and the second substrate material comprises polyamic acid (PAA) comprising a benzene ring. The second mixture 500 is a Hybrid (Hybrid) type polyimide precursor. The polyamic acid containing a benzene ring includes one or a combination of two or more of biphenyl type polyamic acid and pyromellitic type polyamic acid. The solvent of the second mixture 500 may use a combination of one or more of Dimethylacetamide (DMA), N-methylpyrrolidone (NMP), gamma-butyrolactone (GBL), ethylene glycol monobutyl ether (BC).
Specifically, the second mixture 500 is uniformly coated on the second glass substrate 400 to form a thin film of the second mixture 500, and the coating method may be transfer printing using a printing plate. The coating area depends on the product design. The film thickness is determined depending on the selected polyimide precursor material, the discharge volume, and the printing mesh size. The temperature is raised to volatilize the solvent therein (precure). Again, the temperature is raised to a higher temperature (cure) and the heated polyamic acid and polyamide film form and delaminate. The polyamic acid (PAA) undergoes imidization and is dehydrated to form polyimide. The polyimide has a stable pretilt angle and a high voltage holding ratio, and can meet the requirements of liquid crystal alignment, charge release and ion isolation. The polyamide (SPI) film containing benzene ring has macromolecular rigid structure, excellent mechanical performance, substrate adsorption and low residual DC voltage. It is to be understood that the present application is not limited to the kind of the second alignment material and the second substrate material, and any material and system capable of performing both the alignment function and the substrate function may be used in the present application.
S5: liquid crystal is injected between the first substrate 10 and the second substrate 20 and assembled into a liquid crystal cell 100 a.
Referring to fig. 3(g), step S5 includes injecting liquid crystal, coating sealant, and vacuum bonding. Wherein the cell is aligned such that the first alignment layer 111 and the second alignment layer 211 are opposite.
The liquid crystal cell 100a includes a first substrate 10 and a second substrate 20, a liquid crystal layer 30 disposed between the first substrate 10 and the second substrate 20, and a sealant 40 disposed between the first substrate 10 and the second substrate 20 for sealing the liquid crystal layer 30.
S6: the first glass substrate 200 and the second glass substrate 400 are removed from the liquid crystal cell 100 a.
Referring to fig. 3(h) to 3(i), in step S6, removing the first and second glass substrates 200 and 400 includes immersing the liquid crystal cell 100a in hydrofluoric acid to remove the first and second glass substrates 200 and 400.
Removing the first and second glass substrates 200 and 400 includes heating the liquid crystal cell 100a to peel the first glass substrate 200 from the first alignment liner 11 and the second glass substrate 400 from the second alignment liner 21. The glass material and the polyimide material have different thermal expansion coefficients, and the deformation difference is the largest at the characteristic temperature, so that the polyimide material can be separated from the inorganic glass substrate by heating to a certain temperature.
It is to be understood that the above-described order for the steps of the method is for illustration only, and the steps of the method of the present invention are not limited to the order specifically described above unless specifically stated otherwise.
The manufacturing method of the liquid crystal display panel comprises the following steps: providing a first glass substrate, and forming a first display function layer on the first glass substrate; coating a first mixed material containing a first alignment material and a first substrate material on the first display functional layer, and precuring and curing the first mixed material to layer the first alignment material and the first substrate material, wherein the first alignment material forms a first alignment layer, the first substrate material forms a first substrate layer, and a first alignment substrate is obtained, so that a first substrate is obtained; providing a second glass substrate, and forming a second display function layer on the second glass substrate; coating a second mixed material containing a second alignment material and a second substrate material on the second display function layer, and pre-curing and curing the second mixed material to layer the second alignment material and the second substrate material, wherein the second alignment material forms a second alignment layer, the second substrate material forms a second substrate layer, and a second alignment substrate is obtained, so that a second substrate is obtained; injecting liquid crystal between the first substrate and the second substrate and assembling the liquid crystal into a liquid crystal box; and removing the first glass substrate and the second glass substrate in the liquid crystal cell. The film layer structure of the array substrate and the color film substrate is formed by completing the film layer process of the array substrate and the color film substrate on the glass substrate, particularly the high-temperature process such as ELA and the like, meanwhile, the alignment film capable of being used as a supporting layer is formed in the alignment film process, the glass substrate is removed in an etching or heating mode after the glass substrate is formed into a box, other film layers are supported by the alignment film, the curvature limitation of liquid crystal display can be broken through, and flexible liquid crystal display is realized.
The foregoing provides a detailed description of embodiments of the present application, and the principles and embodiments of the present application have been described herein using specific examples, which are presented solely to aid in the understanding of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. The utility model provides a liquid crystal display panel, includes relative first base plate and the second base plate that sets up and is located first base plate with the liquid crystal layer between the second base plate which characterized in that:
the first substrate comprises a first alignment substrate and a first display function layer arranged on one side, far away from the liquid crystal layer, of the first alignment substrate, and the first alignment substrate comprises a first alignment layer close to one side of the liquid crystal layer and a first substrate layer far away from one side of the liquid crystal layer;
the second base plate comprises a second alignment substrate and a second display function layer arranged on one side, far away from the liquid crystal layer, of the second alignment substrate, and the second alignment substrate comprises a second alignment layer close to one side of the liquid crystal layer and a second substrate layer far away from one side of the liquid crystal layer.
2. The liquid crystal display panel according to claim 1, wherein a thickness of the first alignment substrate and/or the second alignment substrate is 0.05 mm to 0.4 mm.
3. The liquid crystal display panel of claim 1, wherein the material of the first alignment layer comprises polyimide, and the material of the first substrate layer comprises polyamic acid including a benzene ring.
4. The liquid crystal display panel of claim 1, wherein the material of the second alignment layer comprises polyimide, and the material of the second substrate layer comprises polyamic acid containing a benzene ring.
5. The liquid crystal display panel according to claim 3 or 4, wherein the polyamic acid containing a benzene ring comprises one or a combination of two or more of biphenyl type polyamic acid and pyromellitic type polyamic acid.
6. The liquid crystal display panel according to any one of claims 1 to 4, wherein the first display function layer includes a thin film transistor, and the thin film transistor is a low temperature polysilicon thin film transistor.
7. A manufacturing method of a liquid crystal display panel comprises the following steps:
providing a first glass substrate, and forming a first display function layer on the first glass substrate;
coating a first mixed material containing a first alignment material and a first substrate material on the first display functional layer, and precuring and curing the first mixed material to layer the first alignment material and the first substrate material, wherein the first alignment material forms a first alignment layer, the first substrate material forms a first substrate layer, and a first alignment substrate is obtained, so that a first substrate is obtained;
providing a second glass substrate, and forming a second display function layer on the second glass substrate;
coating a second mixed material containing a second alignment material and a second substrate material on the second display function layer, and pre-curing and curing the second mixed material to layer the second alignment material and the second substrate material, wherein the second alignment material forms a second alignment layer, the second substrate material forms a second substrate layer, and a second alignment substrate is obtained, so that a second substrate is obtained;
injecting liquid crystal between the first substrate and the second substrate and assembling the liquid crystal into a liquid crystal box; and
removing the first glass substrate and the second glass substrate in the liquid crystal cell.
8. The method of manufacturing a liquid crystal display panel according to claim 7, wherein the step of removing the first glass substrate and the second glass substrate in the liquid crystal cell includes:
immersing the liquid crystal cell in hydrofluoric acid to remove the first glass substrate and the second glass substrate; or
And heating the liquid crystal box to enable the first glass substrate to be peeled from the first alignment substrate, and the second glass substrate to be peeled from the second alignment substrate.
9. The method of manufacturing a liquid crystal display panel according to claim 7, wherein the first alignment material includes polyamide, and the first substrate material includes polyamic acid including a benzene ring.
10. The method of manufacturing a liquid crystal display panel according to claim 7 or 9, wherein the second alignment material includes polyamide, and the second substrate material includes polyamic acid including a benzene ring.
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