CN108508657B - Manufacturing method and application of alignment film - Google Patents
Manufacturing method and application of alignment film Download PDFInfo
- Publication number
- CN108508657B CN108508657B CN201810327446.3A CN201810327446A CN108508657B CN 108508657 B CN108508657 B CN 108508657B CN 201810327446 A CN201810327446 A CN 201810327446A CN 108508657 B CN108508657 B CN 108508657B
- Authority
- CN
- China
- Prior art keywords
- alignment liquid
- special
- alignment
- substrate
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
Abstract
The invention provides a manufacturing method and application of an alignment film. The method comprises the following steps: providing a substrate, wherein an alignment liquid region and a special-shaped region are arranged on one surface of the substrate, and the special-shaped region is selected from at least one of a concave region and a convex region; spraying alignment liquid on the alignment liquid area to form an alignment liquid film; adjusting the fluidity of the alignment liquid around the special-shaped area to enable the alignment liquid to flow to the special-shaped area and cover the special-shaped area or inhibit the alignment liquid from flowing to the special-shaped area; and (3) curing the alignment liquid. The inventor finds that the mobility of the alignment liquid around the special-shaped area can be adjusted to ensure that the special-shaped area is covered by the alignment liquid or is not covered by the alignment liquid, so that the phenomenon of uneven alignment film surface can not exist after the alignment liquid is solidified, and finally the display quality of the display device using the substrate is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a manufacturing method and application of an alignment film.
Background
In the existing TFT-LCD liquid crystal panel, the coating mode of alignment liquid (PI) mainly comprises an APR (automatic printing) plate transfer printing mode (Coater) and an ink jet printing mode (Inkjet), wherein the takt time of the Coater coating mode is longer, the utilization rate of the alignment liquid is low, the equipment is complex, and the switching of coating products is complicated; compared with a Coater coating mode, the Inkjet coating mode has the advantages of lower Tact time, better alignment liquid utilization rate, simple equipment, simpler and more convenient product switching and the like, but is in the way of solving the problem of uneven diffusion of the alignment liquid and the like, and is not completely replaced by the Coater coating mode, especially on organic film products and high-resolution products, the film effect is poor.
Therefore, intensive studies are required for the method of producing the alignment film.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present invention is to provide a method for manufacturing an alignment film, which has the advantages of simple manufacturing method, uniform alignment film surface, high alignment liquid utilization rate, low cost, etc.
The inventors have arrived at the present invention based on the following findings and findings:
when the alignment liquid is formed by spraying (such as ink-jet printing), the alignment liquid may or may not flow to the special-shaped region (such as a concave region or a convex region) around the special-shaped region of the substrate, that is, the mobility of the alignment liquid around the special-shaped region is not controllable, if the alignment liquid flows through and is covered by the alignment liquid in some special-shaped regions, the alignment liquid does not flow through in some special-shaped regions, so that the phenomenon of uneven alignment film surface is caused after the alignment liquid is solidified, and the display of a display device using the substrate is affected, so that mura phenomenon (brightness non-uniformity and various marks are caused) is generated. The inventor has conducted intensive studies to solve the technical problem, and has unexpectedly found that the temperature of the alignment liquid around the shaped region can be changed by a certain means, so that the flow of the alignment liquid is controlled, the alignment liquid flows to the shaped region and covers the shaped region or inhibits the flow of the alignment liquid to the shaped region, so that all the shaped region is covered by the alignment liquid or all the shaped region is not covered by the alignment liquid, and further, after the alignment liquid is solidified, the phenomenon of uneven alignment film surface is avoided, and finally, the display quality of a display device using the substrate is improved.
In one aspect of the invention, a method of making an alignment film is provided. According to an embodiment of the invention, the method comprises: providing a substrate, wherein an alignment liquid area and a special-shaped area are arranged on one surface of the substrate, and the special-shaped area is selected from at least one of a concave area and a convex area; spraying alignment liquid on the alignment liquid area to form an alignment liquid film; adjusting the fluidity of the alignment liquid around the special-shaped area so that the alignment liquid flows to the special-shaped area and covers the special-shaped area or inhibits the alignment liquid from flowing to the special-shaped area; and (3) curing the alignment liquid. The inventor finds that the alignment liquid flows to the special-shaped area and covers the special-shaped area or inhibits the alignment liquid from flowing to the special-shaped area by controlling the flow of the alignment liquid, so that all the special-shaped area is covered by the alignment liquid or not covered by the alignment liquid, and the phenomenon of uneven alignment film surface can not exist after the alignment liquid is solidified, and finally the display quality of the display device using the substrate is improved.
According to the embodiment of the invention, the recess depth of the recess region is greater than or equal to 100 nanometers or the protrusion height of the protrusion region is greater than or equal to the thickness of the alignment liquid film, and the fluidity of the alignment liquid around the special-shaped region is adjusted to inhibit the alignment liquid from flowing to the special-shaped region.
According to an embodiment of the invention, the spraying is inkjet printing.
According to an embodiment of the invention, flowing the alignment liquid to the profiled region and covering the profiled region is achieved by increasing the temperature of the alignment liquid around the profiled region and below the boiling point of the solvent in the alignment liquid; inhibiting the flow of the alignment liquid to the profiled region is achieved by making the temperature of the alignment liquid around the profiled region higher than the boiling point of the solvent in the alignment liquid. According to an embodiment of the present invention, the adjusting of the fluidity of the alignment liquid is achieved by illumination.
According to an embodiment of the present invention, the step of adjusting the mobility of the alignment liquid around the shaped area using light includes: providing a shielding plate with an opening, wherein the opening is arranged corresponding to the special-shaped region, and the orthographic projection of the opening on the substrate is respectively larger than that of the special-shaped region on the substrate; and enabling infrared light to irradiate the alignment liquid around the special-shaped area through the opening.
In another aspect of the present invention, a method for manufacturing an array substrate or a color film substrate is provided. According to an embodiment of the invention, the method comprises; and (3) manufacturing the alignment film by using the method. Therefore, the alignment film in the array substrate or the color film substrate prepared by the method has uniform film surface, so that the display quality of a display panel or a display device using the array substrate or the color film substrate can be greatly improved, the market competitiveness of the display panel or the display device is improved, and the manufacturing method is simple, easy to operate, simple in equipment, low in cost and easy to realize industrial production. Of course, those skilled in the art will understand that the method for manufacturing an array substrate or a color film substrate includes all the features and advantages of the method for manufacturing an alignment film described above, which are not described herein in detail.
In yet another aspect of the present invention, an array substrate or a color film substrate is provided. According to an embodiment of the invention, prepared using the method described previously. Therefore, the film surface of the alignment film in the array substrate or the color film substrate is uniform, so that the display quality of a display panel or a display device using the array substrate or the color film substrate can be greatly improved, and the market competitiveness of the display panel or the display device is improved. Of course, those skilled in the art will appreciate that the array substrate or the color film substrate includes all the features and advantages described above, and will not be described in detail herein.
In yet another aspect of the present invention, a display device is provided. According to an embodiment of the present invention, at least one of the array substrate and the color film substrate described above is included. Therefore, the display device has high display quality, low manufacturing cost and strong market competitiveness. Of course, those skilled in the art will understand that the display device includes all the features and advantages of the foregoing array substrate or color film substrate, which are not described herein.
According to the embodiment of the invention, the special-shaped area on at least one of the array substrate and the color film substrate is not covered by the alignment film, and the special-shaped area which is not covered by the alignment film is arranged corresponding to the black matrix on the color film substrate.
Drawings
Fig. 1 is a schematic flow chart of an alignment film according to an embodiment of the invention.
Fig. 2 is a schematic structural view of a substrate according to another embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an array substrate according to another embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an array substrate according to another embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an alignment film in an array substrate according to another embodiment of the present invention.
Fig. 6 is a schematic structural diagram of an array substrate according to another embodiment of the present invention.
Fig. 7 is a schematic structural view of a substrate according to still another embodiment of the present invention.
Fig. 8 is a schematic structural view of a substrate according to still another embodiment of the present invention.
Reference numerals:
10-a substrate; 11-alignment liquid zone; 121-a recessed region; 122-raised areas; a substrate 13; 14-wiring; 15-grid electrode; a 16-gate insulating layer; 17-drain; 18-source; 19-an active layer; 20-passivation layer (planarization layer); 21-pixel electrodes; 30-aligning the liquid film; 40 shielding plates; 41-opening
Detailed Description
Embodiments of the present invention are described in detail below. The following examples are illustrative only and are not to be construed as limiting the invention. The examples are not to be construed as limiting the specific techniques or conditions described in the literature in this field or as per the specifications of the product. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
In one aspect of the invention, a method of making an alignment film is provided. According to an embodiment of the invention, referring to fig. 1, the method comprises:
s100: a substrate 10 is provided, on one surface of which an alignment liquid region 11 and a shaped region selected from at least one of a concave region 121 and a convex region 122 are provided, and a schematic structure is shown in fig. 2.
It should be noted that, the special-shaped region refers to a region different from the surrounding flat region, and in the embodiment of the present invention, the special-shaped region generally refers to a concave region or a convex region, where the concave region refers to a region lower than the surrounding flat region, for example, in order to facilitate electrical connection of conductive materials on two sides of the insulating layer when the array substrate is manufactured, a via hole is manufactured in the insulating layer, and the above-mentioned concave region is formed at a corresponding position of the via hole after the whole array substrate is manufactured; raised areas refer to areas of the area that are both above the surrounding plane, such as the metal traces of the trace area, wherein the recessed and raised areas do not include stepped areas (e.g., at a in fig. 2). The alignment liquid area refers to an area where an alignment liquid film needs to be formed in a subsequent process.
According to the embodiment of the invention, a person skilled in the art can flexibly select a specific kind of the substrate on which the alignment film is required to be disposed according to actual requirements. In an embodiment of the present invention, the substrate is selected from an array substrate and a color film substrate, where no alignment film is provided. Therefore, the method for manufacturing the alignment film can improve the uniformity of the film surface of the alignment film in the array substrate or the color film substrate, and further improve the display effect of the display device using the array substrate or the color film substrate and the market competitiveness of the display device.
According to the embodiment of the invention, the specific structure of the array substrate or the color film substrate can be any one of the array substrate or the color film substrate in the field. In some embodiments of the present invention, the structure of the array substrate may be referred to as fig. 3 (fig. 3-6 each show an array substrate, and take a concave area as an example of a special-shaped area), specifically: the array substrate includes a substrate 13, a gate electrode 15 and a trace 14 disposed on one surface of the substrate, a gate insulating layer 16 disposed on the surface of the substrate 13 and covering the gate electrode 15 and the trace 14, an active layer 19, a source electrode 18, a drain electrode 17 disposed on a side of the gate insulating layer 16 away from the substrate, a passivation layer (or planarization layer) 20 disposed on a side of the gate insulating layer 16 away from the substrate and covering the active layer, the source electrode and the drain electrode, and a pixel electrode 21 disposed on a side of the passivation layer (or planarization layer) 20 away from the substrate, wherein the pixel electrode 21 is electrically connected to the drain electrode 17 through a via hole of the passivation layer (or planarization layer) 20, thereby forming a recess 121 at a corresponding position of the via hole, and a recess 121 is also formed in a channel region at the active layer generally according to a process of fabricating the passivation layer (or planarization layer) 20. Of course, according to the array substrate with different structures, the concave area and/or the convex area may be formed at other positions during the manufacturing process, which will not be described in detail in this application. In addition, it is well known to those skilled in the art that certain concave areas and/or convex areas are formed in the manufacturing process of the color film substrate, and will not be described in detail herein.
S200: and spraying alignment liquid on the alignment liquid area to form an alignment liquid film, wherein the structure schematic diagram is shown in fig. 4.
According to the embodiment of the invention, a person skilled in the art can flexibly select a specific spraying mode according to actual requirements. In an embodiment of the invention, the spraying is inkjet printing. Therefore, the utilization rate of the alignment liquid is high, the takt time is low, the equipment is simple, the substrate for manufacturing the alignment film is easy and convenient to replace, and the phenomenon that the surface of the alignment film is uneven due to the fact that the inkjet printing is adopted at present can be well solved by combining the method for manufacturing the alignment film.
According to the embodiment of the invention, a person skilled in the art can flexibly design the thickness of the formed alignment liquid film according to different practical situations such as different requirements on products. In some embodiments of the invention, the thickness of the alignment liquid film is 65 nm-120 nm. Therefore, the requirements of different substrates such as an array substrate or a color film substrate on the finally obtained alignment film thickness can be met.
It should be noted that, when the alignment liquid film is formed by spraying, the alignment liquid film is in a drop-by-drop state, and is not completely and uniformly spread on the substrate, and in fig. 4, the alignment liquid is simply drawn into a uniformly spread state for convenience of drawing, and finally, the alignment liquid can be completely spread in the alignment liquid area by free diffusion, and the alignment film is formed after curing treatment.
S300: and adjusting the fluidity of the alignment liquid around the special-shaped area to enable the alignment liquid to flow to the special-shaped area and cover the special-shaped area or inhibit the alignment liquid from flowing to the special-shaped area.
According to the embodiment of the invention, the fluidity of the alignment liquid around the special-shaped area is mainly adjusted by changing the temperature of the alignment liquid around the special-shaped area, so that the alignment liquid around the special-shaped area and the alignment liquid in other areas generate diffusion potential energy difference, temperature difference and viscosity difference, thereby realizing the fluidity adjustment of the alignment liquid around the special-shaped area, and specifically: when the alignment liquid flows to the special-shaped area and covers the special-shaped area, the temperature of the alignment liquid around the special-shaped area is increased and is lower than the boiling point of a solvent in the alignment liquid, at the moment, a diffusion potential difference is generated between the alignment liquid around the special-shaped area and the alignment liquid in other areas, and the diffusion coefficient is a dominant factor influencing the flow of the alignment liquid around the special-shaped area, namely, the diffusion coefficient of the alignment liquid around the special-shaped area is improved, the fluidity of the alignment liquid around the special-shaped area is increased, and the flow of the alignment liquid to the special-shaped area is promoted; when the flow of the alignment liquid to the special-shaped area is inhibited, the temperature of the alignment liquid around the special-shaped area is higher than the boiling point of a solvent in the alignment liquid, at the moment, the solvent is quickly evaporated due to the higher temperature, the viscosity change of the alignment liquid is far larger than the change of a diffusion coefficient, at the moment, the viscosity is a dominant factor influencing the flow of the alignment liquid around the special-shaped area, and the fluidity of the alignment liquid around the special-shaped area is deteriorated due to the increase of the viscosity of the alignment liquid around the special-shaped area, so that the continuous flow of the alignment liquid around the special-shaped area is inhibited.
According to an embodiment of the present invention, in order to better control the fluidity of the alignment liquid described above, in some embodiments of the present invention, the fluidity of the alignment liquid is achieved by illumination, and the temperature of the alignment liquid around the profiled region is changed by changing the intensity of the illumination. According to an embodiment of the invention, the light employed may be infrared light. Therefore, as the infrared light has a thermal effect, the infrared light is absorbed by the alignment liquid around the special-shaped area and then is converted into heat energy, so that the temperature of the alignment liquid around the special-shaped area can be increased, the diffusion coefficient or viscosity of the alignment liquid can be changed, and the fluidity of the alignment liquid can be controlled.
According to the embodiment of the invention, the aim of adjusting the fluidity of the alignment liquid around the special-shaped area by utilizing illumination can be achieved by the following steps:
step one: a shielding plate 40 is provided with an opening 41, which is arranged corresponding to the special-shaped area (only the concave area 121 is taken as an example in the figure), and the orthographic projection of the opening on the substrate is larger than that of the special-shaped area on the substrate, and the structural schematic diagram is shown in fig. 5.
According to the embodiment of the invention, in order to effectively shield the alignment liquid around the non-abnormal region from light, an exposure mask plate can be selected as a shielding plate in the embodiment of the invention. Thus, the shielding effect is better.
Step two: the infrared light is made to irradiate the alignment liquid 30 around the shaped region through the opening 41, and the schematic structure is shown in fig. 5.
Therefore, through the opening, the infrared light irradiates the alignment liquid around the special-shaped area, so that diffusion potential energy difference, temperature difference and viscosity difference are generated between the alignment liquid irradiated by the infrared light and the alignment liquid not irradiated by the infrared light, and therefore the fluidity of the alignment liquid irradiated by the infrared light around the special-shaped area can be controlled, the alignment liquid around the special-shaped area flows to the special-shaped area and covers the special-shaped area or inhibits the alignment liquid from flowing to the special-shaped area. Moreover, as the shielding plate is shielded in the non-opening area, excessive mobility of the alignment liquid corresponding to the non-opening area due to irradiation of infrared light can be prevented, and excessive alignment liquid is further caused to flow into the concave area, so that uniformity of a film surface of the finally formed alignment film is not facilitated; or the alignment liquid in the non-opening area has too small fluidity due to irradiation of infrared light, and is also unfavorable for uniformity of the alignment film surface.
According to the embodiment of the present invention, as described above, if the alignment liquid flows through and is covered by the alignment liquid in some of the shaped areas, no alignment liquid flows through and is covered in some of the shaped areas, the alignment liquid is solidified to cause the uneven alignment film surface phenomenon, which affects the display of the display device using the substrate, but when the shaped areas are covered by the alignment liquid or not covered by the alignment liquid, the uneven alignment film surface phenomenon is not caused, which does not affect the display effect of the display device using the substrate, and following describes in detail, with some embodiments of the present invention, two cases of promoting the alignment liquid around the shaped areas to flow to the shaped areas and being covered by the alignment liquid and inhibiting the alignment liquid to flow to the shaped areas:
in some embodiments of the present invention, when the alignment liquid needs to flow to the special-shaped area and cover the special-shaped area, the alignment liquid around the special-shaped area may be raised in temperature and lower than the boiling point of the solvent in the alignment liquid by a certain means (hereinafter, light is taken as an example): taking the concave area as an example, the temperature of the alignment liquid around the concave area is increased and lower than the temperature of the solvent in the alignment liquid, a diffusion potential difference is generated between the alignment liquid irradiated by the light and the alignment liquid not irradiated by the light, and the diffusion coefficient is a dominant factor influencing the flow of the alignment liquid around the concave area, namely, the diffusion coefficient of the alignment liquid around the concave area is increased, the fluidity of the alignment liquid around the concave area is increased, the flow of the alignment liquid to the concave area is promoted, and the structural schematic diagram when the concave area 121 is covered by the alignment liquid is shown in fig. 6; when the thickness of the alignment liquid in the concave area meets the use requirement, the alignment liquid needs to be restrained from continuously flowing into the concave area, so that uneven alignment film surface caused by too thin thickness of the alignment liquid around the concave area and too thick thickness of the alignment liquid in the concave area is prevented, the display effect is influenced, and at the moment, the restraint of the flow of the alignment liquid can be realized by reinforcing illumination, so that the temperature of the alignment liquid around the concave area is higher than the boiling point of a solvent, and the specific situation is that the flow of the alignment liquid is restrained; the illumination intensity is enhanced, so that the temperature of the alignment liquid around the concave area is higher than the boiling point temperature of the solvent, the solvent is quickly evaporated, the viscosity change of the alignment liquid is far greater than the change of the diffusion coefficient, at this time, the viscosity is the dominant factor influencing the flow of the alignment liquid around the concave area, and the mobility of the alignment liquid around the concave area is poor due to the fact that the viscosity of the alignment liquid around the concave area is increased, and further the continuous flow of the alignment liquid around the concave area is inhibited.
In other embodiments of the present invention, when the raised area is also included on the substrate, referring to fig. 1 and 7, after the alignment liquid film (fig. 7) is formed by spraying, the temperature of the alignment liquid around the shaped area is raised by illumination and is lower than the temperature of the solvent in the alignment liquid, a diffusion potential difference is generated between the alignment liquid illuminated by the illumination and the alignment liquid not illuminated by the illumination, the diffusion coefficient is a dominant factor affecting the flow of the alignment liquid around the shaped area, that is, the diffusion coefficient of the alignment liquid around the shaped area is increased, the flow of the alignment liquid around the shaped area is increased, and the flow of the alignment liquid to the shaped area is promoted, and the structural schematic diagram when the shaped area is covered by the alignment liquid is referring to fig. 8.
In still other embodiments of the present invention, when the alignment liquid is inhibited from flowing to the profiled region, the alignment liquid around the profiled region may be irradiated with light such that the temperature of the alignment liquid is higher than the boiling point of the solvent in the alignment liquid, specifically: the illumination intensity is enhanced, so that the temperature of the alignment liquid around the special-shaped area is higher than the boiling point temperature of the solvent, the solvent is quickly evaporated, the viscosity change of the alignment liquid is far greater than the change of the diffusion coefficient, at the moment, the viscosity is the dominant factor influencing the flow of the alignment liquid around the special-shaped area, and the mobility of the alignment liquid is poor due to the fact that the viscosity of the alignment liquid is increased, so that the flow of the alignment liquid around the special-shaped area to the special-shaped area is inhibited.
According to the embodiment of the present invention, when the recess depth of the recess area is shallow (for example, less than 100 nm) or the protrusion height of the protrusion area is less than the thickness of the sprayed alignment liquid film, a person skilled in the art may flexibly design the flow of the alignment liquid around the shaped area according to the actual requirement, that is, may promote the alignment liquid around the shaped area to flow to the shaped area and cover the shaped area, referring to fig. 6 and 8, and may also inhibit the alignment liquid around the shaped area from flowing to the shaped area, referring to fig. 4 and 7. However, when the depth of the recess is 100 nm or more or the height of the protrusion is 100 nm or more, the mobility of the alignment liquid around the shaped region needs to be adjusted by light to inhibit the alignment liquid from flowing to the shaped region. Specific: if the recess depth (greater than or equal to 100 nanometers, such as 150 nanometers and 200 nanometers) of the recess area is too large, a certain amount of alignment liquid is adhered to the side wall of the recess area when the alignment liquid flows to the recess area, and the deeper the recess area is, the more the alignment liquid amount is adhered to the side wall, so that the alignment liquid amount around the recess area is greatly reduced, after the alignment liquid is solidified, compared with the film thickness of the alignment film which is not irradiated by light, the film thickness of the alignment film around the recess area is thinner, so that the display quality of a display device using the substrate is affected, and the flow of the alignment liquid around the special-shaped area can be selectively inhibited; if the height of the protrusions of the protruding areas is equal to or greater than the thickness of the alignment liquid film, the alignment liquid around the protruding areas is difficult to flow through the protruding areas, so that the flow of the alignment liquid is selectively inhibited.
According to some embodiments of the present invention, when the substrate is an array substrate and is used for high-end electronic products such as 4K or 8K, a thicker organic film is usually formed on the array substrate before the alignment film is disposed, and the depth of the recess region is deepened by the organic film, and is usually greater than 100 nm, so that for products with such a structure, the flow of the alignment liquid around the special-shaped region is suppressed to improve the uniformity of the film surface of the alignment film, thereby improving the display effect of the product.
It will be understood by those skilled in the art that, in general, the solvent in the alignment liquid is not only one, and when multiple solvents do not form an azeotropic mixture, the above-mentioned temperature of the alignment liquid around the heteromorphic region is lower than the boiling point temperature of the solvent, which means that the temperature of the alignment liquid around the heteromorphic region is lower than the boiling point temperature of the solvent, and the temperature of the alignment liquid around the heteromorphic region is higher than the boiling point temperature of the solvent, so those skilled in the art can flexibly select the temperature higher than the boiling point temperature of any one or more solvents according to practical situations, and of course, the temperature higher than the boiling point temperature of all solvents; when a plurality of solvents form an azeotropic mixture, the above-mentioned temperature of the alignment liquid around the shaped region is lower than the boiling point temperature of the solvent, which means lower than the boiling point temperature of the azeotropic mixture, and the temperature of the alignment liquid around the shaped region is higher than the boiling point temperature of the solvent, which means higher than the boiling point temperature of the azeotropic mixture. In summary, making the temperature of the alignment liquid around the shaped region lower than the boiling point temperature of the solvent improves the fluidity of the alignment liquid around the shaped region on the premise of ensuring that the solvent is not evaporated, and making the temperature of the alignment liquid around the shaped region higher than the boiling point temperature of the solvent evaporates part of the solvent in the alignment liquid around the shaped region, thereby improving the viscosity of the alignment liquid around the shaped region and inhibiting the flow of the alignment liquid around the shaped region.
S400: and (3) curing the alignment liquid.
In some embodiments of the present invention, conventional thermal curing equipment or photo curing equipment may be employed; in other embodiments of the present invention, the shielding plate in the solution of the present invention may be directly removed, and the intensity of the light may be adjusted so that the temperature in the alignment liquid is at least near the highest boiling point temperature of the solvents in the solvents, or near the boiling point temperature of the azeotropic mixture, for example, the boiling point of the azeotropic mixture is 250 ℃, and the curing temperature may be selected to be higher than 230 ℃, which is, of course, the higher the curing temperature, the faster the solvent evaporates and the shorter the curing time, which is specifically designed flexibly by those skilled in the art according to practical requirements, and the present invention is not limited thereto. In addition, the curing treatment method is simple to operate, does not need to replace curing equipment, saves cost and saves process time.
The inventor finds that in the method for manufacturing the alignment film, the flow of the alignment liquid is controlled (for example, the flow of the alignment liquid is controlled by changing the temperature of the alignment liquid by adopting an illumination method), so that the alignment liquid flows to the special-shaped area and covers the special-shaped area or inhibits the flow of the alignment liquid to the special-shaped area, and therefore, all the special-shaped area is covered by the alignment liquid and is or is not covered by the alignment liquid, and further, after the alignment liquid is solidified, the phenomenon of uneven alignment film surface does not exist, and finally, the display quality of a display device using the substrate is improved.
In another aspect of the present invention, a method for manufacturing an array substrate or a color film substrate is provided. According to an embodiment of the invention, the method comprises; and (3) manufacturing the alignment film by using the method. Therefore, the alignment film in the array substrate or the color film substrate prepared by the method has uniform film surface, so that the display quality of a display panel or a display device using the array substrate or the color film substrate can be greatly improved, the market competitiveness of the display panel or the display device is improved, and the manufacturing method is simple, easy to operate, simple in equipment, low in cost and easy to realize industrial production. Of course, those skilled in the art will understand that the method for manufacturing an array substrate or a color film substrate includes all the features and advantages of the method for manufacturing an alignment film described above, which are not described herein in detail.
Of course, it can be understood by those skilled in the art that the above method for manufacturing an array substrate or a color film substrate includes, in addition to the steps for manufacturing an alignment film by using the above method, the steps for manufacturing a conventional array substrate or a color film substrate, for example, the steps for manufacturing structures such as a light shielding layer, a thin film transistor, an electrode, and a storage capacitor when manufacturing the array substrate, where the steps for manufacturing the structures are only required to flexibly select a conventional manufacturing method according to actual requirements by those skilled in the art, and the requirements are not limited herein; when the color film substrate is manufactured, the manufacturing steps of the black matrix, the color filter layer, the flat layer and other structures are further included, wherein the manufacturing steps of the structures are required to be flexibly selected by a person skilled in the art according to actual requirements, and the conventional manufacturing method is not limited.
In yet another aspect of the present invention, an array substrate or a color film substrate is provided. According to an embodiment of the present invention, the method for manufacturing the array substrate or the color film substrate is used. Therefore, the film surface of the alignment film in the array substrate or the color film substrate is uniform, so that the display quality of a display panel or a display device using the array substrate or the color film substrate can be greatly improved, and the market competitiveness of the display panel or the display device is improved. Of course, those skilled in the art will appreciate that the array substrate or the color film substrate includes all the features and advantages described above, and will not be described in detail herein.
In yet another aspect of the present invention, a display device is provided. According to an embodiment of the present invention, at least one of the array substrate and the color film substrate described above is included. Therefore, the display device has high display quality, low manufacturing cost and strong market competitiveness. Of course, those skilled in the art will understand that the display device includes all the features and advantages of the foregoing array substrate or color film substrate, which are not described herein.
According to the embodiment of the invention, the special-shaped areas on at least one of the array substrate and the color film substrate are covered by the alignment film, so that the special-shaped areas can be selected to be arranged corresponding to the black matrix of the color film substrate or not to be arranged corresponding to the black matrix when the display device is manufactured later, and the special-shaped areas can be flexibly selected by a person skilled in the art according to actual requirements without limiting the requirements.
According to the embodiment of the invention, the special-shaped area on at least one of the array substrate and the color film substrate is not covered by the alignment film, and the special-shaped area which is not covered by the alignment film is arranged corresponding to the black matrix on the color film substrate. Thus, the abnormal region not covered by the alignment film does not adversely affect the display effect of the display device.
The specific type of the display device according to the embodiment of the present invention is not limited, and may be flexibly selected by those skilled in the art according to practical situations. In an embodiment of the present invention, the display device includes, but is not limited to, a mobile phone, a television, a tablet computer, a game machine, and any electronic device or any wearable device having a display function.
It will be understood by those skilled in the art that the above display device includes, in addition to the above-mentioned array substrate or color film substrate, necessary structures or components of a conventional display device, for example, a mobile phone, and includes, in addition to the above-mentioned array substrate or color film substrate, structures or components of a liquid crystal layer, a sound processing module, a camera module, a CPU processor, a fingerprint module, and the like.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (6)
1. A method of making an alignment film, comprising:
providing a substrate, wherein an alignment liquid area and a special-shaped area are arranged on one surface of the substrate, the special-shaped area is arranged adjacent to the alignment liquid area, the alignment liquid area is positioned at the periphery of the special-shaped area,
wherein the special-shaped region is selected from at least one of a concave region and a convex region,
the recessed areas are areas with the areas lower than the peripheral plane, and comprise areas corresponding to through holes in the insulating layer in the array substrate and/or areas corresponding to channel areas at the active layer in the thin film transistor on the array substrate;
the raised areas are areas with the areas higher than the surrounding planes, and the raised areas comprise areas corresponding to metal wires of the wire routing areas;
spraying alignment liquid on the alignment liquid area to form an alignment liquid film;
adjusting the fluidity of the alignment liquid around the special-shaped area so that the alignment liquid flows to the special-shaped area and covers the special-shaped area;
the alignment liquid is cured,
wherein, the adjusting the fluidity of the alignment liquid is realized by illumination, and the step of adjusting the fluidity of the alignment liquid around the special-shaped area by illumination comprises the following steps:
providing a shielding plate with an opening, wherein the opening is arranged corresponding to the special-shaped region, and the orthographic projection of the opening on the substrate is respectively larger than that of the special-shaped region on the substrate;
and enabling infrared light to irradiate the alignment liquid around the special-shaped area through the opening, so that the temperature of the alignment liquid around the special-shaped area is increased and is lower than the boiling point of a solvent in the alignment liquid.
2. The method of claim 1, wherein the spraying is inkjet printing.
3. A method for manufacturing an array substrate or a color film substrate, comprising: a step of producing an alignment film by the method of claim 1 or 2.
4. An array substrate or a color film substrate, which is prepared by the method of claim 3.
5. A display device comprising at least one of the array substrate and the color film substrate of claim 4.
6. The display device according to claim 5, wherein a shaped region on at least one of the array substrate and the color film substrate is not covered with an alignment film, and the shaped region not covered with the alignment film is provided corresponding to a black matrix on the color film substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810327446.3A CN108508657B (en) | 2018-04-12 | 2018-04-12 | Manufacturing method and application of alignment film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810327446.3A CN108508657B (en) | 2018-04-12 | 2018-04-12 | Manufacturing method and application of alignment film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108508657A CN108508657A (en) | 2018-09-07 |
| CN108508657B true CN108508657B (en) | 2023-07-25 |
Family
ID=63381589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810327446.3A Active CN108508657B (en) | 2018-04-12 | 2018-04-12 | Manufacturing method and application of alignment film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108508657B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101082745A (en) * | 2006-05-31 | 2007-12-05 | 株式会社日立显示器 | Liquid crystal display device |
| CN101140390A (en) * | 2006-09-08 | 2008-03-12 | 株式会社日立显示器 | Liquid crystal display device |
| CN102799029A (en) * | 2012-08-22 | 2012-11-28 | 京东方科技集团股份有限公司 | Liquid crystal display substrate and liquid crystal display device |
| CN105068326A (en) * | 2015-09-01 | 2015-11-18 | 深圳市华星光电技术有限公司 | Liquid crystal display substrate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140090301A (en) * | 2012-12-21 | 2014-07-17 | 삼성디스플레이 주식회사 | Display device and method of manufacturing the same |
-
2018
- 2018-04-12 CN CN201810327446.3A patent/CN108508657B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101082745A (en) * | 2006-05-31 | 2007-12-05 | 株式会社日立显示器 | Liquid crystal display device |
| CN101140390A (en) * | 2006-09-08 | 2008-03-12 | 株式会社日立显示器 | Liquid crystal display device |
| CN102799029A (en) * | 2012-08-22 | 2012-11-28 | 京东方科技集团股份有限公司 | Liquid crystal display substrate and liquid crystal display device |
| CN105068326A (en) * | 2015-09-01 | 2015-11-18 | 深圳市华星光电技术有限公司 | Liquid crystal display substrate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108508657A (en) | 2018-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107248523B (en) | Pixel defining layer and manufacturing method thereof | |
| JP2008243773A (en) | Electric light emitting apparatus, its manufacturing method, electronic equipment, thin film structure, and thin film formation method | |
| US9316866B2 (en) | Array substrate, display panel and display device | |
| KR20080016173A (en) | Thin film trnasistor array panel, manufacturing method thereof and display apparatus having the same | |
| JP6049111B2 (en) | Organic thin film transistor array substrate, method for manufacturing the same, and display device | |
| KR20090024383A (en) | Thin film trnasistor display substrate, method of manufacturing the same and display apparatus having the same | |
| US20070249074A1 (en) | Active device array substrate, color filter substrate and manufacturing methods thereof | |
| US20140176847A1 (en) | Display device and method of manufacturing the same | |
| KR20160083487A (en) | Organic light emitting device and manufacturing method thereof | |
| US9929367B2 (en) | Display device and method for fabricating the same | |
| CN113629115B (en) | Display panel, display device and manufacturing method of display panel | |
| CN109256395B (en) | Display substrate, manufacturing method thereof and display device | |
| CN108508657B (en) | Manufacturing method and application of alignment film | |
| US20220320206A1 (en) | Mask plate, display substrate and manufacturing method thereof, and display device | |
| EP3088952B1 (en) | Mask group, pixel unit and manufacturing method therefor, array substrate and display device | |
| KR20090012725A (en) | Color filter substrate of liquid crystal display and fabricating method thereof | |
| KR20080003086A (en) | Color filter substrate of liquid crystal display device and method for fabricating the same | |
| KR20070079879A (en) | Method of fabricating black matrix of color filter | |
| CN114023797B (en) | Display panel and manufacturing method thereof | |
| US11404505B2 (en) | Display substrate, ink-jet printing method thereof, and display apparatus | |
| US20050250270A1 (en) | Process of manufacturing thin film transistor | |
| US11333920B2 (en) | Display panel | |
| CN111766745A (en) | Display panel, manufacturing method of display panel and display device | |
| US9666838B2 (en) | Organic electroluminescent device and manufacturing method thereof, and display device | |
| US20230189623A1 (en) | Display panel and method of manufacturing same, and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |