Flexible liquid crystal display panel and manufacturing method thereofTechnical content
The invention relates to the field of panels, in particular to a flexible liquid crystal display panel and a manufacturing method thereof.
Background
With the continuous development of living standard and technology level, the demand of people on various aspects is continuously improved. In the aspect of display technology, the display device is no longer satisfied with the traditional rigid flat display device, so a flexible display device appears, and the flexible display device has the characteristics of lightness, thinness, easy bending, convenience in carrying, wider application range and the like, and will gradually become the mainstream of the next generation display.
At present, the flexible substrate of the flexible display device mainly comprises ultra-thin glass, stainless steel sheets, and polymer films, wherein the polymer films are the main materials. A flexible substrate used in a flexible OLED (Organic Light-Emitting Diode) is generally a yellow alignment film, and a TAC (Triacetyl Cellulose) or transparent alignment film is selected as an important material in a production process of the flexible liquid crystal display, and is mainly used for protecting a polarizing plate in a display panel. In contrast, in the two materials, the transparent alignment film is thinner and thinner, but the problem of low ultraviolet transmittance is generally existed, which causes that the sealant cannot be sufficiently cured by ultraviolet light in the ODF (one drop filling) manufacturing process, thereby causing the sealant to pierce the liquid crystal, and the liquid crystal to be polluted. If the ultraviolet transmittance is low by improving the transparent alignment film, it is necessary to sacrifice other characteristics of the alignment film, such as heat resistance, flexibility, and the like.
Therefore, in the existing display panel technology, there is a problem how to cause the phenomenon that the sealant is not completely cured during the ultraviolet irradiation to pierce the liquid crystal and the liquid crystal is polluted due to the low ultraviolet transmittance of the transparent alignment film, and an improvement is urgently needed.
Disclosure of Invention
The invention relates to a flexible liquid crystal display panel and a manufacturing method thereof, which are used for solving the problems that in the prior art, frame glue is incompletely cured during ultraviolet irradiation to pierce liquid crystal, the liquid crystal is polluted and the like due to low ultraviolet transmittance of a transparent alignment film.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
according to the present application, there is provided a flexible liquid crystal display panel including: at least one substrate and a novel frame glue coated on the substrate; wherein,
the substrate comprises a color film substrate and an array substrate;
the frame glue is coated on the color film substrate or the array substrate and consists of 40-65% of epoxy resin, 5-25% of reaction monomer, 5-10% of thermal initiator, 0.5-6% of photoinitiator, 8-20% of filler and 0.8-1.5% of additive.
According to a preferred embodiment provided by the present application, the epoxy resin includes a thermosetting epoxy resin and a photo-curing epoxy resin.
According to a preferred embodiment provided by the present application, the thermosetting epoxy resin accounts for 40% -60% of the sealant by mass, and the photo-curable epoxy resin accounts for 15% -25% of the sealant by mass.
According to a preferred embodiment provided by the present application, the thermosetting epoxy resin is a butylene epoxy resin, a cyclopentadiene epoxy resin, or a plurality of different compounds of butylene epoxy resin and cyclopentadiene epoxy resin; the light-cured epoxy resin is glycidyl ether epoxy resin, alicyclic epoxy resin or various different compounds of the glycidyl ether epoxy resin and the alicyclic epoxy resin.
According to a preferred embodiment provided herein, the glycidyl ether epoxy resin is a brominated glycidyl ether epoxy resin, a bisphenol F type, or a plurality of different compounds of bisphenol a type and bisphenol F type; the alicyclic epoxy resin is a cycloethylene oxide structure, a cyclopentene oxide structure or a plurality of different compounds of the cycloethylene oxide structure and the cyclopentene oxide structure.
According to a preferred embodiment provided herein, the reactive monomer is one or more of butyl glycidyl ether, allyl glycidyl ether, alkyl glycidyl ether, vinyl ether, and p-tert-butyl phenyl glycidyl ether.
According to a preferred embodiment provided herein, the thermal initiator is one or more of diethylenetriamine, triethylenetetramine, diaminodiphenylmethane, diaminodiphenylsulfone, or a dicyandiamide modified derivative; the photoinitiator is one or more of cationic photoinitiator and onium salt compound; the filler comprises an inorganic filler and an organic filler; the additive is a silane coupling agent.
According to a preferred embodiment provided by the present application, the inorganic filler accounts for 1% -6% of the frame sealant by mass, and the organic filler accounts for 5% -15% of the frame sealant by mass.
The application also provides a manufacturing method of the flexible liquid crystal display panel, which comprises the flexible liquid crystal display panel, and the method comprises the following steps:
s10, providing a substrate;
s20, coating the transparent alignment film solution on the substrate, and heating and curing to form an alignment film substrate;
s30, preparing the frame glue;
s40, coating the manufactured frame glue on the alignment film substrate;
s50, performing ultraviolet irradiation on the alignment film substrate coated with the sealant;
s60, injecting liquid crystal on another substrate;
s70, aligning the substrate injected with the liquid crystal and the substrate irradiated by the ultraviolet light to form a box;
s80, carrying out photo-curing and thermal curing on the substrate for 1-2 minutes;
and S90, laser stripping the carrier substrate.
According to a preferred embodiment provided by the present application, the method for manufacturing the sealant in step S30 includes:
s301, checking all materials;
s302, weighing a liquid: 40% -65% of epoxy resin, 5% -25% of reaction monomer, 5% -10% of thermal initiator and 0.8% -1.5% of additive;
s303, weighing a powdery material: 0.5 to 6 percent of photoinitiator and 8 to 20 percent of filler;
s304, mixing the liquid resin and the powdery material together, and dispersing and defoaming;
s305, filtering and filling;
s306, checking the quality of the manufactured frame glue.
Has the advantages that: compared with the prior art, the flexible liquid crystal display panel and the manufacturing method thereof can delay solidification of the frame glue, carry out ultraviolet irradiation on the frame glue firstly and then carry out lamination, are not influenced by the ultraviolet transmittance of the alignment film, and solve the problems that the frame glue is incompletely solidified when the ultraviolet irradiation is carried out due to low ultraviolet transmittance of the transparent alignment film and pierces the liquid crystal, the liquid crystal is polluted and the like.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 invention, 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 flow chart of a method for manufacturing a flexible liquid crystal display panel according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a method for manufacturing sealant in a flexible liquid crystal display panel according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to 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", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The application provides a flexible liquid crystal display panel, includes: at least one substrate and a novel frame glue coated on the substrate; the substrate comprises a color film substrate and an array substrate; the frame glue is coated on the color film substrate or the array substrate and consists of 40-65% of epoxy resin, 5-25% of reaction monomer, 5-10% of thermal initiator, 0.5-6% of photoinitiator, 8-20% of filler and 0.8-1.5% of additive.
In a preferred embodiment, the epoxy resin includes a thermosetting epoxy resin and a photo-curing epoxy resin.
In a preferred embodiment provided by the present application, the thermosetting epoxy resin accounts for 40% to 60% of the mass of the sealant, and the photo-curable epoxy resin accounts for 15% to 25% of the mass of the sealant.
In a preferred embodiment, the thermosetting epoxy resin is butylene epoxy resin, cyclopentadiene epoxy resin, or a plurality of different compounds of butylene epoxy resin and cyclopentadiene epoxy resin; the light-cured epoxy resin is glycidyl ether epoxy resin, alicyclic epoxy resin or various different compounds of the glycidyl ether epoxy resin and the alicyclic epoxy resin.
In a preferred embodiment, the glycidyl ether epoxy resin is a brominated glycidyl ether epoxy resin, a bisphenol F epoxy resin, or a plurality of different compounds of bisphenol a and bisphenol F epoxy resins; for example: glycidyl ether type epoxy resins, brominated glycidyl ether type epoxy resins, and the like. The alicyclic epoxy resin is a cycloethylene oxide structure, a cyclopentene oxide structure or a plurality of different compounds of the cycloethylene oxide structure and the cyclopentene oxide structure. The alicyclic epoxy resin has high gelling speed, the glycidyl ether epoxy resin has low gelling speed, the alicyclic epoxy resin and the glycidyl ether epoxy resin are mixed, and the proportion is adjusted, so that the good viscosity can be ensured when the upper substrate and the lower substrate are bonded under the action of the cationic photoinitiator, and the complete curing in a short time can be ensured after the upper substrate and the lower substrate are bonded. Wherein the alicyclic epoxy resin accounts for 6-10% of the mass of the frame sealant, and the glycidyl ether epoxy resin accounts for 10-20% of the mass of the frame sealant.
In a preferred embodiment provided herein, the reactive monomer is one or more of butyl glycidyl ether, allyl glycidyl ether, alkyl glycidyl ether, vinyl ether, and p-tert-butyl phenyl glycidyl ether.
In a preferred embodiment provided herein, the thermal initiator is one or more of diethylenetriamine, triethylenetetramine, diaminodiphenylmethane, diaminodiphenylsulfone, or a modified derivative of dicyandiamide. The photoinitiator is one or more of cationic photoinitiator and onium salt compounds. For example: diaryliodonium salts, triaryliodonium salts, alkyl iodonium salts, cumeneferrocenium hexafluorophosphate. The filler comprises an inorganic filler and an organic filler; the inorganic filler includes but is not limited to white carbon black, the organic filler includes but is not limited to cellulose, wherein the inorganic filler plays a role in adjusting the moisture permeability of the frame glue, and the organic filler plays a role in adjusting viscosity and thixotropy. The inorganic filler accounts for 1-6% of the mass components of the frame glue, and the organic filler accounts for 5-15% of the mass components of the frame glue. The additive is a silane coupling agent and mainly plays a role in adjusting viscosity and thixotropy.
Referring to fig. 1, the present application further provides a method for manufacturing a flexible liquid crystal display panel, including any one of the above flexible liquid crystal display panels, the method including the steps of: s10, providing a substrate which can be a color film substrate or an array substrate, wherein the substrate can be made of a glass substrate, a quartz substrate or a resin substrate; s20, coating the transparent alignment film solution on the substrate, and heating and curing to form an alignment film substrate; s30, preparing the frame glue; s40, coating the manufactured frame glue on the alignment film substrate; s50, performing ultraviolet irradiation on the alignment film substrate coated with the sealant; s60, injecting liquid crystal on the other substrate; s70, aligning the substrate injected with the liquid crystal and the substrate irradiated by the ultraviolet light to form a box; s80, performing photocuring and thermocuring on the substrate forming the box for 1-2 minutes, and performing the next operation after the photocuring epoxy resins on the surface of the frame glue are completely reacted; and S90, laser stripping the carrier substrate.
Referring to fig. 2, the method for manufacturing the sealant in the step S30 includes: s301, checking all materials; s302, weighing a liquid: 40% -65% of epoxy resin, 5% -25% of reaction monomer, 5% -10% of thermal initiator and 0.8% -1.5% of additive; s303, weighing a powdery material: 0.5 to 6 percent of photoinitiator and 8 to 20 percent of filler; s304, mixing the liquid resin and the powdery material together, and dispersing and defoaming; s305, filtering and filling; s306, checking the quality of the manufactured frame glue.
In the above step, the conditions of the ultraviolet irradiation are as follows: the light intensity is 60-150mw/cm2, and the irradiation time is 10-75S. The heat curing conditions were: the temperature is 80-220 deg.C, and the time is 30-200 min.
The application discloses a flexible liquid crystal display panel, ODF frame glue and flexible liquid crystal display panel that obtain according to above-mentioned method and material preparation can solve because of the low frame glue that causes of transparent alignment film ultraviolet transmissivity solidifies incomplete and appears when carrying out the ultraviolet irradiation frame glue and impale liquid crystal, phenomenon such as liquid crystal is polluted, and because liquid crystal is injected into on another base plate, need not consider that the ultraviolet ray can cause the damage to the liquid crystal, consequently, also need not to use the ultraviolet light cover, the cost has still been saved simultaneously.
The flexible liquid crystal display panel and the manufacturing method thereof provided by the embodiment of the invention are described in detail, a specific example is applied in the description to explain the principle and the implementation of the invention, and the description of the embodiment is only used for helping to understand the technical scheme and the core idea of the invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.