Manufacturing method for improving dot matrix edge display whitening of FFSTN liquid crystal display

Abstract

The invention discloses a manufacturing method for improving dot matrix edge display whitening of an FFSTN liquid crystal display, belongs to the technical field of display, and can thoroughly improve the edge whitening problem of the liquid crystal display and improve the character shadow problem of the appearance surface of the display. The method comprises the following steps of: manufacturing an exposure chromium plate for photoetching a pattern according to product requirements, and completing the manufacturing of the display according to a liquid crystal display manufacturing process. The photoetching pattern adopts an exposure chromium plate design, and an edge linear filling pattern which is conventionally adopted originally is optimized into a square block filling which is consistent with a dot matrix pattern in a display pattern pixel. And manufacturing according to a normal production process of the liquid crystal display. According to the liquid crystal display, the filling blocks with the same size as the dot matrix pixels are designed in the wiring area of the liquid crystal display, the design of the filling blocks in the wiring area must be completely consistent with the line width and the line thickness of the dot matrix pixels, and the manufactured liquid crystal display ensures the product color and the display uniformity.

Description

Technical Field

[0001] The invention belongs to the field of display technology, and in particular relates to a technology for improving the whitening of dot matrix edges of FFSTN liquid crystal displays. Background Art

[0002] As LCD applications become more and more widespread in the market, the demand is also increasing. At the same time, there are higher requirements for display performance, including high contrast, low reflectivity, wide viewing angle, high brightness, touch and fast response, etc. The products are widely used in industrial control, medical, home, and vehicle-mounted instrumentation fields, such as blood glucose meters and vehicle-mounted industrial control instruments. They have high contrast and high clarity, high cost performance, and effects that ordinary LCDs cannot achieve.

[0003] Due to the characteristics and requirements of FFSTN dot matrix products, the color of the entire display screen must be uniform in the application, otherwise uneven brightness and darkness will occur during the display process. In addition, because the product display area is completed by the designed dot matrix pixels, but the outermost edge of the dot matrix pixels is the routing, there is a height difference between the dot matrix area and the edge routing, resulting in a slight difference in the box thickness between the dot matrix edge area and the routing area. When the product is lit, due to the high box thickness of the dot matrix pixel position, the liquid crystal threshold voltage in this area is high, and the display is dark (dark words). The box thickness of the routing area at the edge of the product dot matrix is ​​low, and the liquid crystal threshold voltage in this area is low, and the display is bright (bright words), that is, the dot matrix edge display is white.

[0004] In order to eliminate this light leakage phenomenon, the industry will adopt: 1. Use black light-shielding tape or print black ink around; 2. Use black spacer hard powder between LCD product glass; but no matter which method is used, it will destroy the overall beauty of the LCD, and it will also increase material costs and labor costs, and it still cannot completely solve this problem. Therefore, researching this project has great positive significance in improving product appearance and display consistency, and reducing additional cost expenditures. Summary of the invention

[0005] The present invention provides a technology for improving the whitening of the edge display of FFSTN dot matrix. The core of this technology is to design a filling block with the same size as the dot matrix pixel in the wiring area of ​​the liquid crystal display. The design of the filling block in the wiring area must be completely consistent with the line width and line thickness of the dot matrix pixel. Then, it is manufactured through the normal process of the liquid crystal display. The manufactured liquid crystal display ensures the consistency of product color and display, meeting the needs of customers.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions:

[0007] Step 1: Design the exposure chrome plate for photolithography according to the product customer's needs, and design the edge filling block according to the size of the display pattern dot matrix to make the chrome plate

[0008] Step 2: preparing an upper layer of ITO glass by photolithography, wherein the upper layer of ITO glass is an ITO glass with a pattern prepared by photolithography;

[0009] Step 3: prepare the upper TOP layer, wherein the upper TOP layer is made of relief printing; a printing machine is used to print the liquid TOP liquid onto the upper ITO glass, and then the liquid is cured at a temperature of 280-300°C; the film thickness is 700±100 angstroms.

[0010] Step 4: prepare an upper PI layer, wherein the upper PI layer uses a relief plate; use a printing machine to print the liquid PI onto the upper TOP layer, and then cure it at a temperature of 240-270°C; the film thickness is 600±100 angstroms.

[0011] Step 5: Screen print the sealant on the designed position of the ITO glass, and combine and seal the upper and lower layers of the prepared ITO glass through lamination and hot pressing processes;

[0012] Step 6: Use a powder sprayer to spray the spacer particles onto the glass printed with the PI layer according to the required quantity, i.e., the upper PI layer or the lower PI layer; the upper PI layer or the lower PI layer is printed with liquid PI onto the coated insulating layer by using a relief printing device, and then cured at a temperature of 240-270°C.

[0013] Step 7: Prepare a liquid crystal layer, and inject the liquid crystal into an empty box of a liquid crystal display by using a vacuum method through a crystal filling machine;

[0014] Step 8, preparing a lower TOP layer, wherein the lower TOP layer is printed on the lower ITO glass using a relief plate and a printing press, and then solidified at a temperature of 280-300°C;

[0015] Step 9, using a chrome plate, and using a photolithography process to prepare a lower layer of ITO glass, wherein the lower layer of ITO glass is an ITO glass with a pattern prepared by photolithography. The display prepared by the above-mentioned method for improving the whitening display of the edge of the dot matrix of the FFSTN liquid crystal display, the display is composed of, from top to bottom: an upper layer of ITO glass, an upper TOP layer, an upper PI layer, a sealant, spacer particles, a liquid crystal layer, a lower PI layer, a lower TOP layer, and a lower TOP layer. The wiring area of ​​the display of the present invention is designed with a filling block of the same size as the dot matrix pixel, and the wiring area filling block is designed to be completely consistent with the line width and line thickness of the dot matrix pixel, and the produced liquid crystal display ensures the uniformity of product color and display.

[0016] Furthermore, in step 3 and step 8, the film thickness of the upper TOP layer and the lower TOP layer is 700±100 angstroms.

[0017] Furthermore, in step 4, the thickness of the upper PI layer is 600±100 angstroms, and the thickness of the lower PI layer is still 600±100 angstroms.

[0018] Furthermore, the graphic edge filling design in step 1 is a square filling design that is consistent with the size of the display pattern dot matrix.

[0019] Furthermore, the block filling design in step 1 has a characteristic shape and size that is consistent with the size of the display pattern dot matrix, thereby ensuring that after photolithography, the edge height is consistent with the display area and the thickness of the entire product box is consistent.

[0020] The beneficial effects of the present invention compared with the prior art: The present invention provides a technology for improving the whitening of the edge display of the FFSTN dot matrix, by designing the liquid crystal display wiring area with a filling block of the same size as the dot matrix pixel, and the design of the wiring area filling block must be completely consistent with the line width and line thickness of the dot matrix pixel, so that the manufactured liquid crystal display ensures the uniformity of product color and display. Satisfy customer needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a liquid crystal display edge filling design according to an embodiment of the present invention;

[0022] Figure 2 A structural diagram of a liquid crystal display prepared by a method for improving the whitening of the dot matrix edge display of a FFSTN liquid crystal display according to the present invention;

[0023] Among them, 1-upper ITO glass, 2-upper TOP layer, 3-upper PI layer, 4-sealant, 5-spacer particles, 6-liquid crystal layer, 7-lower PI layer, 8-lower TOP layer, 9-lower ITO glass. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail by enumerating examples below. It should be noted that the specific implementation described here is only used to explain the present invention and is not used to limit the present invention.

[0025] like Figures 1-2 As shown, Figure 1 A schematic diagram of a liquid crystal display edge filling design according to an embodiment of the present invention; Figure 2 The structure diagram of the liquid crystal display prepared by the manufacturing method of the present invention for improving the whitening of the dot matrix edge display of the FFSTN liquid crystal display; Figure 1As shown, the present invention manufactures an exposure chrome plate for photolithography patterns according to actual needs, and completes the manufacture of the display according to the manufacturing process of a liquid crystal display. The exposure chrome plate used for the photolithography patterns, wherein the display pattern is dotted according to the display pixel pattern, and the edge filling design needs to be filled with dot matrix squares that are consistent with the dot matrix pattern in the display pattern pixels, and then the manufacture is completed according to the production process of the liquid crystal display. The display edge of the chrome plate pattern in the present invention is a square filling design, while the prior art is a wiring line design. The display pattern pixel design in the present invention (the upper glass is a horizontal line, and the lower glass is a vertical line, and the upper and lower glasses are bonded to form a pattern display dot matrix pixel.

[0026] The present invention discloses a technology for improving the whitening of the dot matrix edge display of an FFSTN liquid crystal display, comprising the following steps:

[0027] Step 1: According to the needs of product customers, design the exposure chrome plate for photolithography patterns, and design the edge filling block according to the size of the display pattern dot matrix to design and manufacture the chrome plate. After the chrome plate design is completed, it can be manufactured according to the normal LCD production process to meet the needs. The block filling design in step 1 has a characteristic shape and size that is consistent with the display pattern dot matrix size, which ensures that after photolithography, the edge height is consistent with the display area, and the thickness of the entire product box is consistent.

[0028] Step 2: preparing an upper ITO glass 1 by photolithography, wherein the upper ITO glass 1 is an ITO glass with a pattern prepared by photolithography;

[0029] Step 3: prepare the upper TOP layer 2, wherein the upper TOP layer 2 is a relief plate; use a printing machine to print the liquid TOP liquid onto the upper ITO glass 1, and then cure it at a temperature of 280-300°C; the film thickness is 700±100 angstroms.

[0030] Step 4: prepare the upper PI layer 3, the upper PI layer 3 uses a relief plate; use a printing machine to print the liquid PI onto the upper TOP layer 2, and then cure it at a temperature of 240-270°C; the film thickness is 600±100 angstroms.

[0031] Step 5: Use the screen printing method to print the sealant 4 on the designed position of the ITO glass, and combine and seal the upper and lower layers of the prepared ITO glass through lamination and hot pressing processes;

[0032] Step 6, using a powder sprayer, spray the spacer particles 5 onto the glass printed with the PI layer according to the required quantity, that is, the upper PI layer 3 or the lower PI layer 7; the upper PI layer 3 or the lower PI layer 7 is printed on the coated insulating layer by a relief printing device, and then cured at a temperature of 240-270°C;

[0033] Step 7, preparing a liquid crystal layer 6, using a crystal filling machine and a vacuum method to inject liquid crystal into an empty box of a liquid crystal display to prepare a liquid crystal layer 6;

[0034] Step 8, preparing a lower TOP layer 8, wherein the lower TOP layer 8 is printed on the lower ITO glass 9 by using a relief plate and a printing press, and then solidified at a temperature of 280-300° C.;

[0035] Step 9: Use a chrome plate and a photolithography process to prepare a lower layer of ITO glass 9, wherein the lower layer of ITO glass 9 is an ITO glass with a pattern prepared by photolithography.

[0036] The display prepared by the above-mentioned method for improving the whitening display at the edge of the dot matrix of the FFSTN liquid crystal display comprises, from top to bottom: an upper ITO glass 1, an upper TOP layer 2, an upper PI layer 3, a sealant 4, spacer particles 5, a liquid crystal layer 6, a lower PI layer 7, a lower TOP layer 8, and a lower TOP layer 9. The wiring area of ​​the display of the present invention is designed with a filling block of the same size as the dot matrix pixel, and the wiring area filling block is designed to be completely consistent with the line width and line thickness of the dot matrix pixel, so that the manufactured liquid crystal display ensures the uniformity of product color and display. The FFSTN dot matrix liquid crystal display manufactured by the method of the present invention can completely improve the problem of whitening at the edge of the liquid crystal display, and at the same time improve the problem of word shadow on the appearance surface of the display.

[0037] The above description is only a preferred embodiment of the present invention. Those skilled in the art can make various corresponding changes and modifications based on the above technical solutions and concepts, and all of these changes and modifications should be included in the protection scope of the claims of the present invention.

Claims

1. A method for improving the whitening of the edge of the dot matrix of a FFSTN liquid crystal display, characterized in that: The method is as follows: an exposure chrome plate for photolithography patterns is manufactured according to actual needs, and the display is manufactured according to the manufacturing process of a liquid crystal display. The exposure chrome plate used for the photolithography patterns is dotted according to the display pixel pattern, and the edge filling design needs to be filled with dot matrix blocks consistent with the dot matrix pattern in the display pattern pixels, and then the manufacturing is completed according to the production process of the liquid crystal display. Specifically, the following steps are performed: Step 1: Design the exposure chrome plate for photolithography, and design the edge filling block according to the size of the display pattern dot matrix to make the chrome plate; Step 2: Using a chrome plate and photolithography to prepare an upper layer of ITO glass (1), the upper layer of ITO The glass (1) is ITO glass with patterns prepared by photolithography; Step 3: preparing an upper TOP layer (2), wherein the upper TOP layer (2) is printed on the upper ITO glass (1) by using a relief plate and a printing machine to print a liquid TOP liquid, and then solidify it at a temperature of 280-300° C.; Step 4: preparing an upper PI layer (3), wherein the upper PI layer (3) is formed by using a relief printing plate; using a printing machine to print the liquid PI onto the upper TOP layer (2), and then curing it at a temperature of 240-270° C.; Step 5: The sealant (4) is screen-printed on the designed position of the ITO glass, and the upper and lower layers of the prepared ITO glass are combined and sealed through lamination and hot pressing processes; Step 6: Spray the spacer particles (5) onto the glass printed with the PI layer, i.e., the upper PI layer (3) or the lower PI layer (7) by a powder sprayer according to the required quantity; the upper PI layer (3) or the lower PI layer (7) is printed on the coating insulation layer by a relief printing device, and then cured at a temperature of 240-270°C; Step 7, preparing a liquid crystal layer (6): using a filling machine and a vacuum method, injecting liquid crystal into an empty box of a liquid crystal display; Step 8, preparing a lower TOP layer (8), wherein the lower TOP layer (8) is printed on the lower ITO glass (9) by using a relief plate and a printing press to print a liquid TOP liquid onto the lower ITO glass (9), and then solidifying it at a temperature of 280-300° C.; Step 9: Use a chrome plate to prepare a lower layer of ITO glass (9) by photolithography. The glass (9) is ITO glass with patterns prepared by photolithography.

2. A method for improving the whitening of the dot matrix edge display of a FFSTN liquid crystal display according to claim 1, characterized in that: In the above-mentioned step 3 and step 8, the film thickness of the upper TOP layer (2) and the lower TOP layer (8) are both 700±100 angstroms.

3. A method for improving the whitening of the dot matrix edge display of FFSTN liquid crystal display according to claim 1, characterized in that: In step 4, the thickness of the upper PI layer (3) is 600±100 angstroms, and the thickness of the lower PI layer (7) is still 600±100 angstroms.

4. A method for improving the whitening of the dot matrix edge display of a FFSTN liquid crystal display according to claim 1, characterized in that: The graphic edge filling design in step 1 is a square filling design that is consistent with the display pattern dot matrix size.

5. A method for improving the whitening of the dot matrix edge display of FFSTN liquid crystal display according to claim 4, characterized in that: The block filling design in step 1 has a characteristic shape and size that is consistent with the size of the display pattern dot matrix, thereby ensuring that after photolithography, the edge height is consistent with the display area and the thickness of the entire product box is consistent.

6. A display prepared by the method for improving the whitening of the dot matrix edge display of an FFSTN liquid crystal display as described in any one of claims 1 to 4, wherein the display comprises, from top to bottom, an upper ITO glass (1), an upper TOP layer (2), an upper PI layer (3), a sealant (4), spacer particles (5), a liquid crystal layer (6), a lower PI layer (7), a lower TOP layer (8), and a lower TOP layer (9).

7. A method for improving the whitening of the dot matrix edge display of a FFSTN liquid crystal display according to claim 6, characterized in that: The wiring area of ​​the display is designed with a filling block of the same size as the dot matrix pixel. The line width and line thickness of the wiring area filling block are completely consistent with the dot matrix pixel. The manufactured liquid crystal display ensures the uniformity of product color and display.

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