CN117289514B

CN117289514B - Anti-press reflective display device and manufacturing method thereof

Info

Publication number: CN117289514B
Application number: CN202311198511.4A
Authority: CN
Inventors: 王炎
Original assignee: Nantong Xinluotu Electronic Technology Co ltd
Current assignee: Nantong Xinluotu Electronic Technology Co ltd
Priority date: 2023-09-15
Filing date: 2023-09-15
Publication date: 2024-05-14
Anticipated expiration: 2043-09-15
Also published as: CN117289514A

Abstract

The invention discloses an anti-press reflective display device and a manufacturing method thereof, wherein the anti-press reflective display device comprises an upper substrate and a lower substrate which are relatively arranged in parallel; a plurality of column spaces between the upper and lower substrates, the components forming each column space comprising: (1) Top-side parallel microstructures and/or bottom-side parallel microstructures; (2) The vertical microstructures form the side surface of the column space in a contact or non-contact mode; an ink layer disposed outside the lower substrate; the column space and the layer in which the column space is positioned are filled with an electronic material with bistable property. According to the invention, the micro structure is arranged between the upper substrate and the lower substrate, so that the influence of external pressure on the molecular arrangement of the electronic material when the display device is acted by external force can be reduced, and the anti-pressing effect is achieved.

Description

Anti-press reflective display device and manufacturing method thereof

Technical Field

The invention relates to the field of LCD display, in particular to an anti-press reflective display device and a manufacturing method thereof.

Background

Flat panel display technology has an important role in the information industry. The new display technology and related industries have more than three of the information industry, and the development speed and innovation of the technical level will directly influence the development of the electronic information industry. In the mainstream flat panel display technology, a backlight is required for a Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD) to display, and an Organic Light-Emitting Diode (OLED) emits Light actively by the material itself. When outdoor display is performed, along with the reinforcement of an external light source, the internal light emitting mechanism of the display and the external light source cancel each other, so that the light intensity perceived by human eyes is very limited, and the display effect is poor. In addition, the flat panel display needs to be continuously powered to maintain the display content, and in the portable system with limited electric energy, the endurance of the display technology is obviously insufficient. Therefore, it is necessary to find a flat panel display which has low power consumption and conforms to the physiological habit of human beings. At present, china becomes the largest market consumer country of the flat panel display industry, and development of a novel flat panel display industry is not slow.

Based on the low power consumption characteristic of bistable display technology, attention has been paid more and more recently. Common products applying bistable technology are electronic ink screens, cholesteric liquid crystals, etc. The cholesteric liquid crystal is chiral nematic liquid crystal, and the liquid crystal has bistable function by means of reflecting light with a certain wavelength by the twisted liquid crystal layer, so that picture retention after power failure can be realized. Cholesteric liquid crystals can form two stable states and one non-stable state according to different applied voltages. When the voltage is lower, the liquid crystal is in a Bragg reflection state, namely a P state (steady state), the arrangement of liquid crystal molecules is disturbed by applying a certain pulse voltage to the liquid crystal in the P state, an isotropic state is formed, and no specific light is reflected, and the state is in a focal conic state, namely an FC state (steady state). When the high voltage pulse is input again, all liquid crystal molecules are vertically arranged, and the state is a field nematic state, namely an H state (unsteady state). The H-state voltage is rapidly removed to the P-state voltage, so that the conversion from the H-state to the P-state can be realized; the H state voltage is slowly removed from the FC state voltage, so that the conversion from the H state to the FC state can be realized; the P-state voltage is powered up to the FC-state voltage, so that the conversion from the P-state to the FC-state can be realized. Bistable display technology realizes low-power display by controlling voltage and converting two states, and is widely used gradually.

In the prior art, cholesteric liquid crystal is often used in bistable display technology, that is, only when a picture is switched, a voltage is applied to a liquid crystal layer, and liquid crystal molecules rotate under the drive of the voltage, so that switching of different states is realized. However, when the frame is kept unchanged, there is no voltage on the liquid crystal layer, and the liquid crystal molecules are kept in a predetermined state only by intermolecular forces after the previous state switching, and the stability between the liquid crystal molecules is insufficient. The voltage driving mode of the cholesteric phase determines that the anti-pressing capability of the cholesteric phase liquid crystal screen is insufficient, and when a picture is normally displayed, if external force is applied to the cholesteric phase liquid crystal screen, the upper glass substrate and the lower glass substrate of the liquid crystal screen are physically deformed, the deformation is transmitted to the liquid crystal layer, the liquid crystal molecules are caused to rotate, the established state of the liquid crystal molecules can be damaged, and the adverse phenomena such as white spots and the like can occur due to the insufficient anti-pressing capability.

In the prior art, a protective layer is added on a cholesteric liquid crystal screen to ensure that the external pressing force is not transmitted to liquid crystal molecules in a box, but the pressing resistance of the module protection mode is still insufficient, and the structure and the cost are not dominant.

Disclosure of Invention

The invention aims to: in view of the drawbacks of the prior art, an object of the present invention is to provide an anti-press reflective display device and a method for manufacturing the same, in which a microstructure is provided between an upper substrate and a lower substrate, so that the influence of external pressure on the molecular arrangement of an electronic material when the display device is subjected to an external force can be reduced.

The technical scheme is as follows:

in one aspect, the present invention provides an anti-press reflective display device comprising:

-an upper substrate and a lower substrate, the upper and lower substrates being arranged relatively parallel;

-a number of column spaces between the upper and lower base plates, the components forming each of the column spaces comprising:

(1) Top-side parallel microstructures and/or bottom-side parallel microstructures;

(2) The vertical microstructures form the side surface of the column space in a contact or non-contact mode;

-an ink layer disposed outside the lower substrate;

the column space and the layer in which the column space is positioned are filled with an electronic material with bistable property.

Further, the vertical microstructures of the column space are arranged around the pixel array on the inner surface of the lower substrate.

Further, the vertical microstructure total cross-sectional area of the pillar space is no more than 5% of the effective display area of the anti-press reflective display device.

Further, at least one side of the column space is provided with an opening; the open area is 5-20% of the area of the side vertical microstructure.

Further, the parallel microstructures of the column spaces are arranged on the inner surfaces of the upper substrate and the lower substrate; the parallel microstructures of the column space are bonded with the vertical microstructures.

Further, the parallel microstructures of the inner surface of the lower substrate cover the pixel array portion of the lower substrate.

Further, the vertical microstructures and the parallel microstructures are formed by pre-treating and solidifying a photoresist mixture.

Further, the vertical microstructure has a thickness of 3-5 μm; the thickness of the parallel microstructure is 1-2 mu m.

Further, the electronic material having bistable property is selected from at least one of cholesteric liquid crystal, electrochromic material, or electrophoretic coloring material. um (um)

In still another aspect, the present invention also provides a method for manufacturing the anti-press reflective display device, including the steps of:

s1, coating photoresist mixture on the inner surface of an upper substrate and/or the inner surface of a lower substrate, and curing after pretreatment to form a parallel microstructure parallel to the upper substrate and the lower substrate;

S2, coating a photoresist mixture on the inner surface of the lower substrate, and curing after pretreatment to form a vertical microstructure vertical to the lower substrate;

s3, after the upper substrate and the lower substrate are paired to form a plurality of column spaces, filling the column spaces with the electronic material with bistable property and the layers thereof;

And S4, arranging an ink layer on the outer side of the lower substrate, and packaging to obtain the anti-press reflective display device.

The beneficial effects are that:

(1) According to the anti-press reflective display device provided by the invention, the microstructure is arranged between the upper substrate and the lower substrate, and the column space is formed, so that the influence of external pressure on the molecular arrangement of electronic materials when the display device is acted by external force can be reduced, and the anti-press effect is achieved.

(2) The anti-press reflective display device provided by the invention has the advantages that the inner side surface of the upper substrate or the inner side surface of the lower substrate is provided with the plurality of parallel microstructures on at least one side, one side is adhered to the surfaces of the upper substrate and the lower substrate, and the anti-press reflective display device has excellent bonding strength through a larger contact area; the other side is bonded with the vertical microstructure, and the bonding between the same materials has stronger bonding force, can avoid gaps between the vertical microstructure and the substrate, can remarkably enhance the anti-pressing capability of the display device, and can avoid the problem that the molecular arrangement of the electronic material is affected due to easy left and right shaking caused by a single vertical microstructure.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an anti-reflective display device with parallel microstructures on the bottom surface.

FIG. 2 is a schematic diagram of an anti-reflective display device with parallel microstructures on both the bottom and top surfaces.

Fig. 3 is a top view of a vertical microstructure and a pixel unit according to the present invention.

FIG. 4 is a schematic view of a vertical microstructure according to the present invention.

FIG. 5 is a schematic view of the vertical microstructure of the present invention.

Wherein 10 denotes a pixel unit; 11 denotes a pixel electrode; 12 represents a black matrix; 13 denotes an active layer; 14 denotes a gate layer; 15 denotes a source layer; 3 denotes an upper substrate; 4 denotes a lower substrate; 5 represents an ink layer; 6 represents a column space; 7 represents a vertical microstructure; 8 represents parallel microstructures.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

As shown in fig. 1, the present invention provides an anti-press reflective display device including: an upper substrate 3 and a lower substrate 4 disposed in opposite parallel; a plurality of column spaces are provided between the upper substrate 3 and the lower substrate 4, and each column space may be, for example, prismatic (triangular prism, quadrangular prism, pentagonal prism … …), cylindrical, etc., and the components forming each column space include: (1) Top-side parallel microstructures and/or bottom-side parallel microstructures; (2) And the vertical microstructures form the side surface of the column space in a contact or non-contact mode. In the column space, the top surface parallel microstructure and/or the bottom surface parallel microstructure form the bottom surface of the column space and are parallel to the upper substrate or the lower substrate, and the vertical microstructure forms the side surface of the column space and is vertical to the upper substrate and the lower substrate. In order to achieve better anti-pressing effect, the invention comprises at least one of the top surface parallel microstructure and the bottom surface parallel microstructure in each cylinder space, for example, in the case of only the bottom surface parallel microstructure shown in fig. 1, in the case of simultaneously comprising the top surface parallel microstructure and the bottom surface parallel microstructure shown in fig. 2, the top surface parallel microstructure and the bottom surface parallel microstructure can be arranged according to specific requirements. The outer side of the lower substrate is also provided with an ink layer 5. The column space and the layer in which it is located (the layer in which it is located refers to the void space surrounded by the upper and lower substrates and the sealing frame) are filled with an electronic material having bistable properties, which can be specifically selected from at least one of cholesteric liquid crystal, electrochromic material or electrophoretic coloring material. When the electronic materials between the adjacent pixel arrays are different, the adjacent pixel arrays are required to be provided with a partition in order to prevent the circulation of different electronic materials.

Of course, the anti-press reflective display device of the present embodiment should also contain some necessary components known to those skilled in the art. For example, an electrode assembly for driving a display medium to operate typically includes a pixel electrode and a common electrode; a sealing frame for fixing the two substrates and the display medium; an alignment film for further reducing the driving voltage. As further shown in fig. 3, the pixel unit of the display device of the present invention may include a pixel electrode 11, a black matrix 12, an active layer 13, a gate layer 14, and a source layer 15, and the vertical microstructures 7 are arranged along signal lines of the source layer 15 and the gate layer 14. The vertical microstructures in the column space are arranged around the pixel array on the inner surface of the lower substrate, so that the compression resistance of the display device can be obviously enhanced by reasonably and effectively arranging the microstructures. In order to reduce the influence of the parallel microstructure on the display effect and reduce the use of materials, the parallel microstructure of the invention preferably only covers the pixel array part of the lower substrate, so that a column space can be formed between the parallel microstructure and the vertical microstructure, the display device has excellent anti-pressing capability, the display effect of the display device can be improved, and the manufacturing cost can be reduced.

In order not to affect the display effect of the display device and to ensure sufficient supporting strength, the present invention needs to control the overall cross-sectional area of the vertical microstructures, preferably the overall cross-sectional area of the vertical microstructures of the column space is not more than 5% of the effective display area of the anti-press reflective display device.

The column space of the present invention may be relatively airtight, but in order to enhance the fluidity of the electronic material filled in the case and improve the filling effect, the column space may be open, specifically, may be realized by contact or non-contact between vertical microstructures in the same column space, or may be realized by providing openings in a single vertical microstructure. Referring to fig. 4 to 5, a quadrangular prism-shaped column space is exemplified, wherein in fig. 4 (a, c, d, e), the side surface of the column space is formed by four vertical microstructures in a contact manner, and in fig. 4 (b), the side surface of the column space is formed by four vertical microstructures in a non-contact manner, wherein at least one of the vertical microstructures in fig. 4 (a, c, d) is provided with an opening. With respect to the openings in the vertical microstructures, it is in principle only necessary to have a corresponding area, including but not limited to a small hole in the vertical microstructure (as shown in fig. 5a, 5 c), or to divide the vertical microstructure into two to form a channel (as shown in fig. 5 b),

It should be noted that, fig. 5 only shows a schematic view of a rectangular opening, and the shape of the opening is not limited to a rectangle, but may be a circle, a triangle, a pentagon, a hexagon, etc., which is not a limitation of the present invention. To ensure the anti-compression effect, the area of the opening is 5-20% of the area of the side vertical microstructure.

The parallel microstructures and the vertical microstructures in the same column space are bonded and connected, and the photoresist mixture can be prepared by pretreatment and solidification. The photoresist mixture of the invention comprises a photopolymerizable resin, a photopolymerizable monomer, a photoinitiator and an organic solvent, wherein the photopolymerizable resin can be, for example, acrylate resin or epoxy acrylate; the photopolymerizable monomer may be, for example, an acrylate monomer; the photoinitiator may be, for example, 2-hydroxy-2-methylpropionacetone, photoinitiator 907, or photoinitiator 184. For example, the acrylic resin, acrylic monomer, photoinitiator 907, propylene glycol methyl ether acetate and cyclohexanone are mixed and polymerized under illumination. The parallel microstructures and the vertical microstructures formed in this way have excellent bonding strength with each other and with the upper substrate or the lower substrate, so that gaps between the vertical microstructures and the substrate can be avoided, and the anti-pressing capability of the display device can be remarkably enhanced.

The vertical microstructure and the parallel microstructure of the present invention need to have a suitable thickness, and too high a thickness may affect the display effect, and too low a thickness may affect the supporting strength, and preferably the vertical microstructure has a thickness of 3-5 μm and the parallel microstructure has a thickness of 1-2 μm.

The following describes a method for manufacturing an anti-press reflective display device, taking the anti-press reflective display device shown in fig. 1 as an example, comprising at least the following steps:

S1, coating a photoresist mixture on the inner surface of a lower substrate 4, and forming a parallel microstructure 8 parallel to the upper substrate and the lower substrate after pretreatment and solidification;

s2, coating a photoresist mixture on the inner surface of the lower substrate 4, and curing after pretreatment to form a vertical microstructure 7 vertical to the lower substrate;

S3, after the upper substrate 3 and the lower substrate 4 are paired to form a plurality of column spaces, filling the column spaces with the electronic material with bistable property and the layers thereof;

And S4, arranging an ink layer 5 on the outer side of the lower substrate, and packaging to obtain the anti-press reflective display device.

The filling method in step S3 may be, for example, a dropping method or a vacuum infusion method; the temperature of the box is preferably 80-180 ℃ and the time is preferably 20-60 minutes.

According to the invention, the microstructure is arranged between the upper substrate and the lower substrate, and the column space is formed, so that the influence of external pressure on the molecular arrangement of the electronic material when the display device is acted by external force can be reduced, and the anti-pressing effect is achieved. The invention has the advantages that the inner side surface of the upper substrate or the inner side surface of the lower substrate is provided with the plurality of parallel microstructures, one side is bonded with the surfaces of the upper substrate and the lower substrate, and the bonding strength is excellent through the larger contact area with the substrates; the other side is bonded with the vertical microstructure, and the bonding between the same materials has stronger bonding force, so that the problem that the molecular arrangement of the electronic material is influenced due to easy left and right shaking caused by a single vertical microstructure is avoided.

The above disclosure is illustrative of the preferred embodiments of the present invention and, of course, should not be taken as limiting the scope of the invention, and those skilled in the art will appreciate that all or a portion of the procedures described above can be performed without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An anti-press reflective display device, comprising:

(1) A parallel microstructure;

-an ink layer disposed outside the lower substrate;

The column space and the layer in which the column space is positioned are filled with an electronic material with bistable property;

the vertical microstructures of the column space are arranged around the pixel array on the inner surface of the lower substrate;

The parallel microstructures of the cylinder spaces are arranged on the inner surfaces of the upper substrate and the lower substrate; the parallel microstructures of the cylinder space are bonded with the vertical microstructures;

The vertical microstructure and the parallel microstructure are formed by pre-treating and solidifying a photoresist mixture.

2. The anti-press reflective display device of claim 1 wherein the vertical microstructure overall cross-sectional area of the pillar space is no more than 5% of the effective display area of the anti-press reflective display device.

3. The anti-press reflective display device according to claim 1, wherein at least one side of the column space is provided with an opening in a vertical microstructure; the open area is 5-20% of the area of the side vertical microstructure.

4. The anti-press reflective display device according to claim 1, wherein the parallel microstructures of the inner surface of the lower substrate cover the pixel array portion of the lower substrate.

5. The anti-press reflective display device of claim 1, wherein the vertical microstructure is 3-5 μm thick; the thickness of the parallel microstructure is 1-2 mu m.

6. The anti-press reflective display device according to claim 1, wherein the electronic material having bistable character is selected from at least one of cholesteric liquid crystal, electrochromic material, or electrophoretic coloring material.

7. The method of manufacturing an anti-press reflective display device according to any one of claims 1 to 6, comprising the steps of:

S1, coating photoresist mixtures on the inner surfaces of an upper substrate and a lower substrate, and curing after pretreatment to form parallel microstructures parallel to the upper substrate and the lower substrate;