CN216901230U

CN216901230U - Bistable liquid crystal display screen

Info

Publication number: CN216901230U
Application number: CN202221017923.4U
Authority: CN
Inventors: 林志坚; 王海; 曾新勇
Original assignee: Conhui Huizhou Semiconductor Co ltd
Current assignee: Conhui Huizhou Semiconductor Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-07-05
Anticipated expiration: 2032-04-29

Abstract

The utility model provides a bistable liquid crystal display screen which comprises a liquid crystal layer, wherein an upper PI alignment film and a lower PI alignment film are symmetrically arranged on two sides of the liquid crystal layer, the other side of the upper PI alignment film is connected with an anti-UV ultraviolet light line layer, the other side of the anti-UV ultraviolet light line layer is connected with an upper ITO electrode layer, and the other side of the upper ITO electrode layer is connected with an upper glass substrate; and a lower ITO electrode layer and a lower glass substrate are sequentially connected below the lower PI alignment film. The utility model has simple structure, no need of a polaroid and backlight in a display mode, long-time image retention without an electric field, low power consumption, good readability indoors and outdoors, full visual angle and no blind area. The utility model effectively solves the problem of ghost shadow of picture switching of the bistable state liquid crystal display screen in a strong light environment.

Description

Bistable liquid crystal display screen

Technical Field

The utility model belongs to the technical field of display modules, and particularly relates to a bistable liquid crystal display screen.

Background

The bistable liquid crystal display screen is usually applied to supermarkets, outdoor vending machines and the like to display information and prices of commodities, the display modes are all reflection modes, the display is carried out by the external light reflection principle, and a sharp display effect is only achieved in an environment with sufficient light.

In the prior art, in order to reduce the problem of afterimage of screen replacement, a conventional method is to add a layer of UV light-proof light sheet on the surface of surface glass to reduce the damage of UV ultraviolet light to liquid crystal molecules; however, the practical effect is not good, and when the UV-proof film is attached, part of ultraviolet light still permeates, and liquid crystal molecules are sensitive to UV light and are necrotic after long-time exposure, namely the polarity of liquid crystal is damaged, so that the problem of residual shadow is caused.

Therefore, when the liquid crystal display device is exposed to strong light for a long time, the method for pasting a layer of UV-light-proof light sheet on the surface glass in the prior art can not completely block UV ultraviolet light, so that the problem of residual shadow display is caused, and the satisfaction degree of customers is influenced.

SUMMERY OF THE UTILITY MODEL

Accordingly, the present invention provides a bistable liquid crystal display.

The technical scheme of the utility model is as follows:

a bistable liquid crystal display screen is characterized by comprising a liquid crystal layer, wherein an upper PI (polyimide) alignment film and a lower PI (polyimide) alignment film are symmetrically arranged on two sides of the liquid crystal layer, the other side of the upper PI alignment film is connected with an anti-UV (ultraviolet) light line layer, the other side of the anti-UV light line layer is connected with an upper ITO (indium tin oxide) electrode layer, and the other side of the upper ITO electrode layer is connected with an upper glass substrate;

and a lower ITO (indium tin oxide) electrode layer and a lower glass substrate are sequentially connected below the lower PI alignment film.

According to the utility model, the UV-proof ultraviolet light layer is added in the upper glass substrate, so that ultraviolet light can be effectively blocked from entering the liquid crystal layer.

Furthermore, the surface of the upper glass substrate is connected with a surface polarizer for preventing UV light.

Furthermore, a reflective ink layer is arranged on the bottom surface of the lower glass substrate.

Furthermore, a sealing layer is arranged around the region between the upper glass substrate and the lower glass substrate. The upper glass substrate, the lower glass substrate and the sealing layer are sealed to form a sealed inner cavity.

Furthermore, the sealing layer comprises a sealing rubber edge and plastic ball rubber edge powder.

Furthermore, the upper ITO electrode layer comprises ITO segmented electrodes and ITO common electrodes which are arranged in a staggered mode, and the structure of the lower ITO electrode layer is consistent with that of the upper ITO electrode layer.

Furthermore, plastic ball center powder is symmetrically arranged in the liquid crystal layer.

Furthermore, one side of the lower ITO electrode layer is connected with a driving IC.

Further, the liquid crystal layer is a liquid crystal layer with refractive index anisotropy Δ n = 0.1-0.25.

Further, the thickness of the UV ultraviolet light prevention layer is 300A-1000A; the thickness of the upper PI alignment film layer is 400-800A, and the thickness of the lower PI alignment film layer is the same as that of the upper PI alignment film layer.

Particularly, the liquid crystal layer of the utility model adopts the liquid crystal layer containing 1.0-3.0% of the left-handed chiral agent.

Further, the wall thickness of display screen is 2.0um-5.1 um.

The utility model has simple structure, no need of polaroid and backlight in display mode, long-term image retention without electric field, low power consumption, good readability indoors and outdoors, full viewing angle and no blind area.

The utility model effectively solves the problem of ghost shadow of picture switching of the bistable state liquid crystal display screen in a strong light environment.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

A bistable liquid crystal display screen is characterized by comprising a liquid crystal layer 1, wherein an upper PI (polyimide) alignment film 2 and a lower PI (polyimide) alignment film 3 are symmetrically arranged on two sides of the liquid crystal layer, the other side of the upper PI alignment film is connected with an anti-UV (ultraviolet) light line layer 4, the other side of the anti-UV light line layer is connected with an upper ITO (indium tin oxide) electrode layer 5, and the other side of the upper ITO (indium tin oxide) electrode layer is connected with an upper glass substrate 6;

a lower ITO (indium tin oxide) electrode layer 7 and a lower glass substrate 8 are connected in sequence below the lower PI alignment film.

Further, a surface polarizer 61 for preventing UV light is attached to the surface of the upper glass substrate.

Further, a reflective ink layer 81 is disposed on the bottom surface of the lower glass substrate.

Further, a sealing layer 9 is arranged around the region between the upper glass substrate and the lower glass substrate. The upper glass substrate, the lower glass substrate and the sealing layer are sealed to form a sealed inner cavity.

Further, the sealing layer comprises a sealing rubber edge 91 and plastic ball rubber edge powder 92.

Further, the upper ITO electrode layer comprises ITO segmented electrodes 51 and ITO common electrodes 52 which are arranged in a staggered mode, and the structure of the lower ITO electrode layer is consistent with that of the upper ITO electrode layer.

Furthermore, plastic ball center powder 11 is symmetrically arranged in the liquid crystal layer.

Further, one side of the lower ITO electrode layer is connected to a driving IC 71.

Further, the thickness of the UV ultraviolet light prevention layer is 300A-1000A; the thickness of the upper PI alignment film layer is 400-800A, and the thickness of the lower PI alignment film layer is the same as that of the upper PI alignment film layer. A large number of experiments of the inventor show that when the thickness of the UV-resistant ultraviolet light line layer is larger than 300A, the UV ultraviolet light can be blocked by 100%, so that liquid crystal molecules are prevented from being damaged by ultraviolet light, and the problem of ghost shadow is effectively solved.

Further, the wall thickness of display screen is 2.0um-5.1 um.

Comparative example 1

This comparative example provides a bistable liquid crystal display panel having the same structure as that of example 1, except that this example was not provided with a UV light-blocking surface polarizer and a UV light-blocking ultraviolet ray layer.

Comparative example 2

This comparative example provides a bistable liquid crystal display panel having the same structure as that of example 1, except that the UV-ray shielding layer is not provided in this example.

The experimental effect proves

UV ultraviolet test was performed under the same conditions using the bistable liquid crystal display panels of the structures of example 1, comparative example 1, and comparative example 2, and the results are shown in the following table.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art. It should be noted that the technical features not described in detail in the present invention can be implemented by any prior art.

Claims

1. A bistable liquid crystal display screen is characterized by comprising a liquid crystal layer, wherein an upper PI alignment film and a lower PI alignment film are symmetrically arranged on two sides of the liquid crystal layer, the other side of the upper PI alignment film is connected with an anti-UV ultraviolet light line layer, the other side of the anti-UV ultraviolet light line layer is connected with an upper ITO electrode layer, and the other side of the upper ITO electrode layer is connected with an upper glass substrate;

and a lower ITO electrode layer and a lower glass substrate are sequentially connected below the lower PI alignment film.

2. The bistable liquid crystal display panel of claim 1, wherein said upper glass substrate has a surface polarizer attached to it to prevent UV light.

3. The bistable liquid crystal display of claim 2, wherein said bottom surface of said lower glass substrate is provided with a layer of reflective ink.

4. The bistable liquid crystal display panel of claim 3, wherein said upper glass substrate is sealed around the area between said lower glass substrates.

5. The bistable liquid crystal display of claim 4, wherein said sealant comprises a bead sealant, a bead powder.

6. The bistable liquid crystal display screen of claim 5, wherein said upper ITO electrode layer comprises staggered ITO segmented electrodes and ITO common electrodes, and said lower ITO electrode layer is structured in accordance with the upper ITO electrode layer.

7. The bistable liquid crystal display of claim 6, wherein said liquid crystal layer is symmetrically disposed with plastic ball center powder.

8. The bistable liquid crystal display of claim 7, wherein said lower ITO electrode layer has a driver IC connected to one side thereof.

9. The bistable liquid crystal display panel of claim 1, wherein the liquid crystal layer has an anisotropy of refractive index Δ n = 0.1-0.25.

10. The bistable liquid crystal display screen of claim 1, wherein said UV-resistant ultraviolet light wire layer has a thickness of from 300 a to 1000 a; the thickness of the upper PI alignment film layer is 400-800A, and the thickness of the lower PI alignment film layer is the same as that of the upper PI alignment film layer.