阅读说明：本技术 一种黑白屏实现彩色显示的工艺方法 (Technological method for realizing color display of black and white screen ) 是由 刘泽明 刘品刚 于 2020-12-28 设计创作，主要内容包括：本发明公开了一种黑白屏实现彩色显示的工艺方法,包括：液晶玻璃与偏光片的贴合；喷涂彩色打印油墨；对液晶玻璃或偏光片进行预处理,所述预处理包括：将聚合物涂料涂布在液晶玻璃或偏光片上喷涂彩色打印油墨的位置处；固化聚合物涂料。还提供了通过上述工艺方法制造的黑白转彩色的显示屏。本发明对黑白液晶屏彩色显示的现有工艺进行了彻底的改变,即能大大降低成本,也能提高生产效率,其实用性好,易于推广应用,具有较大的价值。(The invention discloses a technological method for realizing color display of a black and white screen, which comprises the following steps: attaching the liquid crystal glass and the polaroid; spraying color printing ink; pretreating liquid crystal glass or a polaroid, wherein the pretreatment comprises the following steps: coating the polymer coating on the position of the liquid crystal glass or the polarizer where the color printing ink is sprayed; curing the polymer coating. Also provides a display screen which is manufactured by the process method and is converted from black and white to color. The invention thoroughly changes the prior art of black-and-white liquid crystal screen color display, can greatly reduce the cost and improve the production efficiency, has good practicability, is easy to popularize and apply and has greater value.)

1. A process method for realizing color display of a black and white screen comprises the following steps:

attaching the liquid crystal glass and the polaroid;

spraying color printing ink;

it is characterized in that the preparation method is characterized in that,

pretreating liquid crystal glass or a polaroid, wherein the pretreatment comprises the following steps:

coating the polymer coating on the position of the liquid crystal glass or the polarizer where the color printing ink is sprayed;

curing the polymer coating.

2. The process method for realizing color display of the black-and-white screen according to claim 1, wherein if the liquid crystal glass is pretreated, the pretreatment method further comprises the following steps: before the polymer coating is applied, the liquid crystal glass is cleaned. .

3. The process method for realizing color display of the black-and-white screen according to claim 2, wherein the pre-processed process flow comprises the following steps:

spraying color printing ink to one side of the liquid crystal glass;

and (3) attaching the polarizer to the liquid crystal glass, wherein the color printing ink is positioned between the polarizer and the liquid crystal glass.

4. The process method for realizing color display of the black-and-white screen according to claim 1, wherein if the polarizer is pretreated, the pretreatment method further comprises the following steps: the polarizer is plasma or corona treated prior to application of the polymer coating.

5. The process method for realizing color display of black-and-white screen according to claim 4, wherein the pre-processed process flow further comprises:

attaching a polarizer and liquid crystal glass;

and spraying the color printing ink to the side of the polarizer, which is far away from the liquid crystal glass.

6. The process method for realizing color display of the black-and-white screen according to claim 4, wherein the process flow comprises the following steps:

attaching a polarizer and liquid crystal glass;

carrying out the pretreatment on the polaroid;

and spraying the color printing ink to the side of the polarizer, which is far away from the liquid crystal glass.

7. A process for realizing color display with black-and-white screen according to any of claims 1-6, wherein the polymer coating is applied by roll coating.

8. A black-white to color display screen, which comprises a polarizer, liquid crystal glass and a backlight plate, and is characterized in that the black-white screen is manufactured by the process method for realizing color display through the black-white screen as claimed in claim 3.

9. A black-white to color display screen, which comprises a polarizer, liquid crystal glass and a backlight plate, and is characterized in that the black-white screen is manufactured by the process method for realizing color display through the black-white screen according to claim 5.

10. A black-white to color display screen, which comprises a polarizer, liquid crystal glass and a backlight plate, and is characterized in that the black-white screen is manufactured by the process method for realizing color display through the black-white screen as claimed in claim 6.

Technical Field

The invention relates to the field of display screens, in particular to a technological method for realizing color display of a black and white screen.

Background

Because of its high contrast and wide viewing angle, lcd screens are used in high, medium and low end devices, such as vehicle-mounted display screens, audio display screens, and high-end instrument display screens. The existing black-and-white liquid crystal display realizes color display (such as an automobile speed display panel, an oil meter display panel and the like) by adding a layer of film with color ink silk-screened below a liquid crystal display module. The method solves the problem of black-white screen color display, but has the following defects:

1. generally, 6-8 colors are printed on a color film silk screen, the color gradually changes from dark to light, the effect of realizing the gradual change needs to be realized by silk-screening mesh points with different densities, the silk-screening difficulty is high, the yield is low, and the cost is high.

2. The nesting of 6-8 colors is very difficult, and the colors are slightly dislocated, so that shadows generated by the overlapping of adjacent colors are easy to generate, and the requirements of final products cannot be met.

Another way of realizing color display exists in the prior art: the method for directly silk-screen printing color ink on the liquid crystal glass or the polaroid can solve the problems to a certain extent, but still has the following defects: limited by the screen printing mode, the mode is only suitable for some simple color figures with little screen printing difficulty, and cannot be used for the gradual change color of multicolor halftone screen dots.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, in order to solve the technical problems, the invention provides a technical method for realizing color display of a black-and-white screen and a black-and-white to color display screen.

In order to achieve the purpose, the invention provides the following technical scheme:

a process method for realizing color display of a black and white screen comprises the following steps: attaching the liquid crystal glass and the polaroid; spraying color printing ink; pretreating liquid crystal glass or a polaroid; the pretreatment comprises the following steps: coating the polymer coating on the position of the liquid crystal glass or the polarizer where the color printing ink is sprayed; curing the polymer coating.

Preferably, if the liquid crystal glass is pretreated, the pretreatment method further comprises: before the polymer coating is applied, the liquid crystal glass is cleaned.

More preferably, the process flow after the pretreatment is as follows: spraying color printing ink to one side of the liquid crystal glass; and (3) attaching the polarizer to the liquid crystal glass, wherein the color printing ink is positioned between the polarizer and the liquid crystal glass.

Preferably, if the polarizer is pretreated, the pretreatment method further includes: the polarizer is plasma or corona treated prior to application of the polymer coating.

More preferably, the process flow after the pretreatment further comprises: attaching a polarizer and liquid crystal glass; and spraying the color printing ink to the side of the polarizer, which is far away from the liquid crystal glass.

More preferably, the process flow is: attaching a polarizer and liquid crystal glass; carrying out the pretreatment on the polaroid; and spraying the color printing ink to the side of the polarizer, which is far away from the liquid crystal glass.

Preferably, the polymer coating is applied by roll coating.

A black-white to color display screen comprises a polarizer, liquid crystal glass and a backlight plate, and is manufactured by the following process flows:

cleaning the liquid crystal glass; coating a polymer coating on the surface of the liquid crystal glass; curing the polymer coating; spraying color printing ink to one side of the liquid crystal glass; and (3) attaching the polarizer to the liquid crystal glass, wherein the color printing ink is positioned between the polarizer and the liquid crystal glass.

A black-white to color display screen comprises a polarizer, liquid crystal glass and a backlight plate, and is manufactured by the following process flows:

plasma or corona treatment of the polarizer; coating polymer paint on the surface of the polarizer; curing the polymer coating; attaching a polarizer and liquid crystal glass; and spraying the color printing ink to the side of the polarizer, which is far away from the liquid crystal glass.

A black-white to color display screen comprises a polarizer, liquid crystal glass and a backlight plate, and is manufactured by the following process flows:

plasma or corona treatment of the polarizer; coating polymer paint on the surface of the polarizer; curing the polymer coating; spraying color printing ink on the surface of one side of the polaroid; and attaching the side of the polarizer, which is not sprayed with the color printing ink, to the liquid crystal glass.

In conclusion, the invention has the following beneficial effects:

1. because the colored printing ink layer is the direct spraying on lower polaroid/liquid crystal glazing, consequently need not to need the cover position like silk screen printing colored film among the prior art, and then avoided because the cover position mistake and taken place because the possibility that the overlapping of adjacent colour produced the shadow, thereby the yields have been improved, the cost of adding silk screen printing colored film is about more than twice of the cost of printing colored printing ink layer directly on lower polaroid/liquid crystal glazing simultaneously, thereby this technology has reduced the material cost, the speed of laminating silk screen printing film in addition compares in the speed that ink-jet prints, the former is only one-third of the latter, this technology production efficiency is higher.

2. Because the colored ink layer is directly sprayed on the lower polaroid/liquid crystal glass, compared with the prior art that the colored ink layer is directly silk-screened on the lower polaroid/liquid crystal glass, the method is realized without silk-screening the mesh points with different densities, and is more suitable for the use environment with multiple colors and gradient colors of halftone mesh points.

3. The polymer coating layer and the lower polarizer/liquid crystal glass, the color ink layer and the polymer coating layer have good adhesiveness, and the polymer coating layer is used as an intermediate layer to solve the problem of adhesion of the color ink layer on the lower polarizer/liquid crystal glass, so that the color ink layer is not easy to fall off from the surface of the lower polarizer/liquid crystal glass.

Drawings

Fig. 1 is a schematic structural diagram of a black-and-white to color display screen according to an embodiment.

Fig. 2 is a first process of implementing color display by a black-and-white screen according to the first embodiment.

Fig. 3 is a second process for implementing color display by using a black-and-white screen according to the first embodiment.

Fig. 4 is a schematic structural diagram of a black-and-white to color display screen according to a second embodiment.

Fig. 5 is a third process for implementing color display by using a black-and-white screen in the second embodiment.

Reference numerals:

1. an upper polarizer; 2. liquid crystal glass; 3. a lower polarizer; 4. a polymer coating layer; 5. a colored ink layer; 6. a backlight panel.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" or "an" and the like in the description and in the claims of the present application do not denote a limitation of quantity, but rather denote the presence of at least one.

In the description of the present specification and claims, the terms "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

Specific embodiments of the present application will now be described with reference to the accompanying drawings.

Example one

Fig. 1 shows a specific embodiment of the black-and-white to color display screen of the present application, which comprises, from top to bottom: the liquid crystal display panel comprises an upper polarizer, liquid crystal glass, a lower polarizer, a polymer coating layer, a color ink layer and a backlight plate. The black-white to color display screen is manufactured by the following process flows:

respectively attaching the bottom surface of the upper polarizer and the top surface of the lower polarizer to the two sides of the liquid crystal glass;

spraying color printing ink to one side of the lower polarizer, which is far away from the liquid crystal glass, to form a color ink layer;

and (3) attaching the backlight plate and the lower polarizer, wherein the color ink layer is positioned between the backlight plate and the lower polarizer.

In the above steps, because the color ink layer is directly sprayed on the lower polaroid, the process does not need to be sleeved as the silk-screen color film in the prior art, and further avoids the possibility of generating shadows due to the overlapping of adjacent colors caused by the error of the sleeved position, thereby improving the yield, and meanwhile, the cost for adding the silk-screen color film is more than twice of the cost for directly printing the color ink layer on the lower polaroid, so that the process reduces the material cost, and in addition, the speed for attaching the silk-screen film is only one third of that of ink-jet printing, and the production efficiency of the process is higher.

However, the main material of the lower polarizer is TAC triacetate fiber, and the color ink layer arranged on the material has poor adhesion and is easy to fall off, so that the low yield is caused, and the requirement of the final product cannot be met.

In order to solve the problem, the application provides a pretreatment process on the basis of the process flow, the lower polarizer is pretreated, and the color ink layer is not easy to fall off from the surface of the lower polarizer, and the process comprises the following steps:

plasma or corona treatment of the lower polarizer;

coating a polymer coating on the bottom surface of the lower polarizer;

and curing the polymer coating to form the polymer coating layer.

In the above steps, according to the different types of the selected polymer coatings, the curing mode can adopt UV curing or low-temperature thermosetting, the thickness of the finally formed polymer coating layer is about 2-10 μm, the adopted coating mode is a roll coating method, the polymer coating layer and the lower polarizer as well as the color ink layer and the polymer coating layer have good adhesiveness, and the polymer coating layer as an intermediate layer solves the adhesion problem of the color ink layer on the lower polarizer, so that the color ink layer is not easy to fall off from the surface of the lower polarizer.

As shown in fig. 2, in this embodiment, the lower polarizer is pre-treated before being attached to the liquid crystal glass, that is, the total process flow is as follows:

step1, polarizing plates are processed by plasma or corona;

step2, coating polymer paint on the surface of the lower polarizer;

step3, curing the polymer coating;

step4, respectively attaching the upper polarizer and the lower polarizer to the liquid crystal glass;

step5, spraying color printing ink to one side of the lower polarizer, which is far away from the liquid crystal glass;

and Step6, attaching the backlight plate to the lower polarized light sheet.

As shown in fig. 3, in another preferred embodiment, the lower polarizer is attached to the liquid crystal glass, and then the lower polarizer is pretreated, that is, the total process flow is as follows:

step1, respectively attaching the upper polarizer and the lower polarizer to the liquid crystal glass;

step2, polarizing plates are processed by plasma or corona;

step3, coating polymer paint on the surface of the lower polarizer;

step4, curing the polymer coating;

step5, spraying color printing ink to one side of the lower polarizer, which is far away from the liquid crystal glass;

and Step6, attaching the backlight plate to the lower polarized light sheet.

Wherein, the two process flows are selected according to actual conditions.

Tests prove that direct ink-jet printing on the surface of the polaroid can be realized by the methods of polarizing the surface of the lower polaroid and pre-coating, and the color ink layer can form good adhesive force on the polaroid, so that the existing process of black-and-white liquid crystal screen color display is thoroughly changed, the cost can be greatly reduced, and the production efficiency can also be improved.

Example two

As shown in fig. 4, the difference between the present embodiment and the first embodiment is that the black-white to color display screen sequentially includes, from top to bottom: the liquid crystal display panel comprises an upper polarizer, liquid crystal glass, a polymer coating layer, a color ink layer, a lower polarizer and a backlight plate. The black-white to color display screen is manufactured by the following process flows:

spraying color printing ink on the surface of one side of the liquid crystal glass to form a color ink layer;

respectively attaching the bottom surface of the upper polarizer and the top surface of the lower polarizer to two sides of the liquid crystal glass, wherein the color ink layer is positioned between the liquid crystal glass and the lower polarizer;

and attaching the backlight plate to the lower polarizer.

Similarly, the color ink layer has poor adhesion on the liquid crystal glass and is easy to fall off, so that the low yield is caused, and the requirements of final products cannot be met.

In order to solve the problem, the application provides a pretreatment process on the basis of the process flow, the liquid crystal glass is pretreated, and the color ink layer is not easy to fall off from the surface of the liquid crystal glass, and the process comprises the following steps:

cleaning liquid crystal glass;

coating a polymer coating on the surface of one side of the liquid crystal glass sprayed with the color ink;

and curing the polymer coating to form the polymer coating layer.

In the above steps, according to the different types of the selected polymer coatings, the curing mode can adopt UV curing or low-temperature thermosetting, the thickness of the finally formed polymer coating layer is about 2-10 μm, the adopted coating mode is a roll coating method, the polymer coating layer and the liquid crystal glass, and the color ink layer and the polymer coating layer have good adhesiveness, and the polymer coating layer as an intermediate layer solves the problem of adhesion of the color ink layer on the liquid crystal glass, so that the color ink layer is not easy to fall off from the surface of the liquid crystal glass.

As shown in fig. 5, the total process flow in this embodiment is:

step1, cleaning the liquid crystal glass;

step2, coating a polymer coating on the surface of the liquid crystal glass;

step3, curing the polymer coating;

step4, spraying color printing ink to one side of the liquid crystal glass;

step5, attaching the upper polarizer and the lower polarizer to the liquid crystal glass;

and Step6, attaching the backlight plate to the lower polarized light sheet.

Tests prove that the method for cleaning the liquid crystal glass and pre-coating the liquid crystal glass can realize direct ink-jet printing on the surface of the liquid crystal glass, and the color ink layer can form good adhesive force on the liquid crystal glass, so that the existing process of black-and-white liquid crystal screen color display is thoroughly changed, the cost can be greatly reduced, and the production efficiency can also be improved.