Method for improving screen printing process of black and white LCD (Liquid Crystal Display) screen

Abstract

The invention discloses a method for improving a screen printing process of a black and white LCD (Liquid Crystal Display) screen. The method comprises the following steps: S1, changing a silk screen manufacturing mode: changing a photo-sensitive adhesive screen into a capillary film screen; s2, increasing the mesh number of a silk screen; and S3, changing the type of the scraper, namely changing 65-degree flat scraping into 75-degree sharp scraping. According to the invention, the mesh number of the silk screen is changed, the size of a stagnation point is reduced, and the crushing area is improved; the type of the scraper is changed, the contact area between the scraper and the screen is increased, and the crushing force of the scraper on the PI film surface is reduced; a silk screen manufacturing mode is changed, a photosensitive adhesive screen is changed into a capillary film screen, the flatness of the bottom of the silk screen is increased, and screen printing caused by unevenness of the screen is reduced; the silk-screen size of the product is reduced by 50% on the basis of the flat scraping silk-screen size, and the frame fertilizer caused by reduction of the pressure of the scraper is improved.

Description

Technical Field

[0001] The invention relates to the technical field of black-and-white LCD display screen silk-screen printing, in particular to an improved method for a black-and-white LCD display screen silk-screen printing process. Background Art

[0002] Black and white LCD screens are usually printed with a flat scraper and a screen. However, the unreasonable selection of scrapers and screens and the unreasonable screen printing process can easily cause screen printing. Therefore, screens, scrapers and screen printing methods are the key factors to improve screen printing. In the industry, screen printing is usually solved by flat scraping and steel screen. 1. The structure of the screen is woven from mesh yarn, which will produce mesh knots. In the screen printing process, it is easy to cause screen printing due to the mesh knots that damage the PI. In order to improve screen printing, a common method is to use a steel screen without mesh knots, but the cost of the steel screen is 10 times that of ordinary mesh. 2. Scrapers are mainly flat scrapers and pointed scrapers. Flat scrapers are sharp angles that contact the PI, which are easy to damage the PI, while pointed scrapers are blunt angles that contact the PI. The same pressure is not easy to damage the PI. Now, a 65-degree flat scraper and a 120T screen printing are usually used. Products with high screen printing requirements are prone to screen printing, and the cost of using a steel screen is too high.

[0003] Therefore, in order to correct the above defects, we propose an improved method for the screen printing process of a black and white LCD display screen. Summary of the invention

[0004] The technical problem solved by the invention is to provide an improved method for the silk-screen printing process of a black-and-white LCD display screen.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for improving the screen printing process of a black and white LCD display screen, comprising the following steps: S1. Change the screen making method: change from photosensitive glue screen to capillary soft film screen; S2, increase the mesh count; S3. Change the type of scraper: from a 65-degree flat scraper to a 75-degree pointed scraper.

[0006] Furthermore, in step S2, the mesh count of the screen is changed from 120T to 165T.

[0007] Furthermore, based on the step S3, the screen printing size of the product is reduced by 50% based on the flat-scraping screen printing size.

[0008] Furthermore, in step S1, changing the screen making method includes the following steps: S1.1. Select mesh and clean it; S1.2, after cleaning, the first baking is performed, and after baking, the capillary soft sheet is pasted, and after pasting, the second baking is performed, and after the second baking, the capillary soft sheet is glued, and after gluing, the third baking is performed; S1.3, after the third baking, the film is pasted; S1.4, after pasting the film, sequentially expose, develop after exposure, and bake for the fourth time after development; S1.5. After the fourth baking is completed and inspected, a second exposure is performed and the product can be put into use online.

[0009] Furthermore, in step S3, a 75-degree sharp scraper is installed on a scraper holder perpendicular to the platform.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: in the present invention, the size of the screen mesh is changed, the size of the stationary point is reduced to improve the area of ​​the crushing; the type of the scraper is changed, the contact area between the scraper and the screen is increased, and the crushing force of the scraper on the PI film surface is reduced; the screen manufacturing method is changed from a photosensitive resin screen to a capillary soft film screen, the flatness of the bottom of the screen is increased, and the screen printing caused by the uneven screen is reduced; the screen printing size of the product is reduced, usually by 50% based on the flat scraping screen printing size, to improve the frame fat caused by reducing the scraper pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the scraper structure in the prior art; Figure 2 It is a schematic diagram of the inspection effect of the prior art screen printing after dripping liquid crystal screen printing; Figure 3 It is a schematic diagram of the scraper structure in the present invention; Figure 4 It is a schematic diagram of the inspection effect of liquid crystal screen printing after screen printing technology in the present invention.

[0012] Numbers in the figure: 1. Scraper holder; 2. Flat scraper; 3. Pointed scraper. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] The present invention provides a technical solution: See also Figure 1-4 , a method for improving the screen printing process of a black and white LCD display screen, comprising the following steps: A: Change the size of the screen mesh from 120T to 165T, reduce the size of the stationary point and improve the area of ​​the crushing; B: Change the type of scraper, from 65-degree flat scraper to 75-degree sharp scraper, increase the contact area between the scraper and the screen, and reduce the pressure of the scraper on the PI film surface. Figure 1 As shown, the 75-degree sharp scraper Figure 3 As shown, the 75-degree sharp scraper is installed on the scraper holder perpendicular to the platform; C: Change the screen production method from photosensitive rubber screen to capillary soft film screen, increase the flatness of the bottom of the screen, and reduce screen printing caused by uneven screen; D: Reduce the screen printing size of the product, usually by 50% based on the flat scraping screen printing size, to improve the frame fat caused by reducing the scraper pressure.

[0015] Changing the way the screen is made involves the following steps: S1. Select mesh and clean it; S1, after cleaning, the first baking is performed, and after baking, the capillary soft sheet is pasted, and after pasting, the second baking is performed, and after the second baking, the capillary soft sheet is glued, and after gluing, the third baking is performed; S1. After the third baking, film is applied; S1, after pasting the film, sequentially expose, develop after exposure, and bake for the fourth time after development; S1. After the fourth baking is completed and checked, a second exposure is performed and the product can be put into use online.

[0016] contrast Using existing technology, screen printing and then dripping LCD screen printing to check the effect, there is screen printing, such as Figure 2 shown.

[0017] Using the technology in this case, the LCD screen printing inspection effect is dripped after screen printing, and there is no screen printing, such as Figure 4 shown.

[0018] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for improving the screen printing process of a black and white LCD display screen, characterized in that: The following steps are involved: S1. Change the screen making method: change from photosensitive glue screen to capillary soft film screen; S2, increase the mesh count; S3. Change the type of scraper: from a 65-degree flat scraper to a 75-degree pointed scraper.

2. The improved method for screen printing of black and white LCD display screens according to claim 1, characterized in that: In step S2, the mesh number of the screen is changed from 120T to 165T.

3. The improved method for screen printing of black and white LCD display screens according to claim 1, characterized in that: On the basis of step S3, the screen printing size of the product is reduced by 50% based on the flat-scraping screen printing size.

4. The improved method for screen printing of black and white LCD display screens according to claim 1, characterized in that: In step S1, changing the screen making method includes the following steps: S1.

1. Select mesh and clean it; S1.2, after cleaning, the first baking is performed, and after baking, the capillary soft sheet is pasted, and after pasting, the second baking is performed, and after the second baking, the capillary soft sheet is glued, and after gluing, the third baking is performed; S1.3, after the third baking, the film is pasted; S1.4, after pasting the film, sequentially expose, develop after exposure, and bake for the fourth time after development; S1.

5. After the fourth baking is completed and inspected, a second exposure is performed and the product can be put into use online.

5. The improved method for screen printing of black and white LCD display screen according to claim 1, characterized in that: In step S3, a 75-degree sharp scraper is installed on a scraper holder perpendicular to the platform.

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