WO2018219134A1

WO2018219134A1 - Printing screen and printing method

Info

Publication number: WO2018219134A1
Application number: PCT/CN2018/086758
Authority: WO
Inventors: 王浩田
Original assignee: 京东方科技集团股份有限公司; 鄂尔多斯市源盛光电有限责任公司
Priority date: 2017-06-02
Filing date: 2018-05-14
Publication date: 2018-12-06
Also published as: CN107215086A

Abstract

A printing screen comprises: a first strip screen portion and a second strip screen portion. The strip extension direction of the first strip screen portion is parallel to a printing direction, and the strip extension direction of the second strip screen portion is perpendicular to the printing direction. The number of meshes of the first strip screen portion is less than that of the second strip screen portion, and the area of the mesh unit in the first strip screen portion is equal to that of the second strip screen portion.

Description

Printing screen and printing method

The present application claims priority to Chinese Patent Application No. JP-A No. No. No. No. No. No. No. No. No. No. No. Publication No. .

Technical field

The present disclosure relates to the field of display preparation technology, and in particular to a printing screen and a printing method.

Background technique

The display generally includes an upper substrate and a lower substrate, and the upper substrate and the lower substrate are bonded together by glass glue. The glass paste is usually printed on the upper substrate or the lower substrate by a printing screen, and then the upper substrate and the lower substrate are correspondingly bonded together.

Summary of the invention

Some embodiments of the present disclosure provide a printing screen that includes:

a first strip-shaped screen portion, the strip-shaped extending direction of the first strip-shaped screen portion is parallel to the printing direction; and

a second strip-shaped screen portion, the strip-shaped extending direction of the second strip-shaped screen portion is perpendicular to the printing direction, wherein

The mesh number of the first strip-shaped screen portion is smaller than the mesh number of the second strip-shaped screen portion, and the area of the grid unit in the first strip-shaped screen portion and the second strip-shaped net The area of the grid cells in the layout is equal.

In some embodiments, the difference between the mesh number of the second strip screen portion and the mesh number of the first strip screen portion is 75-100.

In some embodiments, the second strip-shaped screen portion has a mesh number of 400, and the first strip-shaped screen portion has a mesh number of 325.

In some embodiments, the printed screen further comprises:

Frame; and

a screen comprising a first strip of wire for forming the first strip portion and a second strip for forming the second strip portion, wherein the first Both the strip mesh and the second strip mesh are fixed to the frame.

In some embodiments, the printing screen further includes a component mask, wherein the first strip screen and the second strip screen enclose a quadrilateral region, and the component mask is disposed at Within the quadrilateral area.

In some embodiments, the quadrilateral region is a rectangular region.

In some embodiments, the grid cells in the first strip screen portion and the grid cells in the second strip screen portion are rectangular grid cells.

Some embodiments of the present disclosure provide a printing method, including:

Aligning the printing screen of the above embodiment with the printing area of the substrate to be printed; and

The glass paste is scraped on the printing area of the substrate to be printed along the strip extending direction of the first strip-shaped screen portion by a doctor blade.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings used in the description of the embodiments will be briefly described below. It is apparent that the drawings in the following description are only some of the embodiments of the present disclosure, and other drawings may be obtained from those skilled in the art without departing from the drawings.

FIG. 1 is a schematic diagram of a structure of a printing screen provided by an embodiment of the present disclosure.

detailed description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. It is apparent that the described embodiments are a part of the embodiments of the present disclosure, and not all of them. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without departing from the inventive scope are the scope of the disclosure.

In the related art, in the process of printing a glass paste using a printing screen, when the blade used for printing is pressed and scraped on the printing screen, the pressure of the blade to the glass paste is different. In the area where the blade pressure is large, the pressure on the substrate is large when the glass glue is applied, so that a part of the substrate is deformed, and this portion of the substrate causes a certain compression on the glass glue which has been printed on the substrate. Thus, the height of the glass paste corresponding to the portion where the deformation occurs in the substrate is smaller than the height of the glass paste corresponding to the portion of the substrate that has not been deformed. In this case, after the glass paste is applied, the uniformity of the glass paste printed on the substrate is poor, thereby increasing the sealing process difficulty of the display, resulting in low packaging efficiency of the display.

In response to the above problems, some embodiments of the present disclosure provide a printing screen. As shown in FIG. 1, the printing screen comprises a first strip-shaped screen portion 1 and a second strip-shaped screen portion 2. The strip-like extending direction of the first strip-shaped screen portion 1 is parallel to the printing direction, and the strip-like extending direction of the second strip-shaped screen portion 2 is perpendicular to the printing direction. The mesh number of the first strip screen portion 1 is smaller than the mesh number of the second strip screen portion 2, and the area of the grid unit 10 in the first strip screen portion 1 and the second strip screen portion 2 The area of the grid unit 20 is equal. Here, the area of the grid unit 10 in the first strip-shaped screen portion 1 refers to the total area of the grid unit 10 of the first strip-shaped screen portion 1 per unit area, and the first strip-shaped screen portion 2 is The area of the mesh unit 20 refers to the total area of the mesh unit 20 of the second strip-shaped screen portion 2 per unit area.

When the above-mentioned printing screen printing glass paste is used, after the printing screen is aligned with the printing area of the substrate to be printed, the printing area of the substrate to be printed is applied along the strip extending direction of the first strip-shaped screen portion 1 by using a doctor blade. Scrape the glass glue.

In the printing screen provided by the embodiment of the present disclosure, the strip extending direction of the first strip-shaped screen portion 1 is parallel to the printing direction, and the strip extending direction of the second strip-shaped screen portion 2 is perpendicular to the printing direction, thus When the scraper is pressed on the printing screen using a doctor blade, the pressure of the blade to the glass paste corresponding to the first strip-shaped screen portion 1 is smaller than the pressure of the glass paste corresponding to the second strip-shaped screen portion 2. However, since the number of meshes of the first strip-shaped screen portion 1 is smaller than the mesh number of the second strip-shaped screen portion 2, the area of the grid unit 10 in the first strip-shaped screen portion 1 and the second strip-shaped screen portion The area of the grid cells 20 in 2 is equal, and therefore, the area of each of the grid cells 10 in the first strip-shaped screen portion 1 is larger than the area of each of the grid cells 20 in the second strip-shaped screen portion 2. Therefore, in the case where the volume of the glass strip corresponding to the first strip-shaped screen portion 1 per unit area and the second strip-shaped screen portion 2 per unit area is the same, the first strip-shaped screen portion 1 of the unit area is The area of each of the grid cells 10 is larger than the area of each of the grid cells 20 of the second strip-shaped screen portion 2 per unit area, so that the area of all the hollow regions in the first strip-shaped screen portion 1 per unit area is larger than the unit The area of all the hollowed out areas in the second strip-shaped screen portion 2 of the area, therefore, the height of the glass glue per unit area scraped on the substrate by the first strip-shaped screen portion 1 is scraped by the second strip-shaped screen portion 2 The glass glue per unit area coated on the substrate is low in height. Therefore, in consideration of the pressure and the height of the glass glue, the height of the glass paste corresponding to the first strip-shaped screen portion 1 printed on the substrate and the corresponding second strip mesh can be completed after the glass paste is blown. The height difference of the height of the glass glue of the plate portion 2 is small, which improves the uniformity of the glass glue printed on the substrate, thereby reducing the sealing process difficulty of the display and improving the packaging efficiency of the display.

In some embodiments, the difference between the mesh number of the second strip-shaped screen portion 2 and the mesh number of the first strip-shaped screen portion 1 is greater than 75. In this way, the height difference between the height of the glass paste corresponding to the first strip-shaped screen portion 1 printed on the substrate and the height of the glass paste corresponding to the second strip-shaped screen portion 2 can be remarkably reduced. However, when the difference between the mesh number of the second strip screen portion 2 and the mesh number of the first strip screen portion 1 exceeds 100, a new problem may occur. For example, after the glass paste is applied, the height of the glass paste corresponding to the first strip-shaped screen portion 1 printed on the substrate may be smaller than the height of the glass paste corresponding to the second strip-shaped screen portion 2. Therefore, in some embodiments, the difference between the mesh number of the second strip-shaped screen portion 2 and the mesh of the first strip-shaped screen portion 1 is 75 to 100. For example, 75, 80, 85, 90, 95 or 100.

In some embodiments, the mesh number of the second strip screen portion 2 is set to 400 mesh, and the mesh number of the first strip screen portion 1 is set to 325 mesh which is commonly used. Therefore, not only the height difference between the glass glue height of the corresponding first strip-shaped screen portion 1 printed on the substrate and the glass glue height corresponding to the second strip-shaped screen portion 2 can be significantly reduced, and the problem of generating new problems is also eliminated. possibility.

In some embodiments, as shown in FIG. 1, the printing screen described above includes a frame 4 and a screen 5. The screen 5 includes a first strip-shaped screen 51 for forming the first strip-shaped screen portion 1 and a second strip-shaped screen 52 for forming the second strip-shaped screen portion 2, the first strip-shaped screen Both the 51 and the second strip screen 52 are fixed to the frame 4. In some embodiments, the material of the above-mentioned screen is a common polymer fiber or organic fiber or the like.

In some embodiments, as shown in FIG. 1, the printing screen described above further includes a component mask 30. The first strip mesh 51 and the second strip screen 52 enclose a quadrilateral region 3, and the component mask 30 is disposed in the quadrilateral region 3. In this manner, when the glass paste is printed on the substrate to be printed using the above-mentioned printing screen, the component mask 30 in the quadrilateral region 3 can be made to correspond to the component region on the substrate to be printed, thereby avoiding printing glass glue. During the process, the glass glue leaked into the component area where printing was not required.

In some embodiments, as shown in FIG. 1, the quadrilateral region 3 is a rectangular region. In this way, the structure of the printing screen can be made more uniform, which reduces the difficulty in making the printing screen.

In some embodiments, as shown in FIG. 1, the grid unit 10 in the first strip-shaped screen portion 1 and the grid unit 20 in the second strip-shaped screen portion 2 are all rectangular grid units. By setting the grid unit 10 in the first strip-shaped screen portion 1 and the grid unit 20 in the second strip-shaped screen portion 2 as rectangular grid units of a regular shape, the first control can be better. The mesh number of the strip-shaped screen portion 1 and the second strip-shaped screen portion 2, and the grid unit 10 in the first strip-shaped screen portion 1 and the grid unit 20 in the second strip-shaped screen portion 2 The area is reduced to reduce the height difference between the height of the glass paste corresponding to the first strip-shaped screen portion 1 printed on the substrate and the height of the glass paste corresponding to the second strip-shaped screen portion 2, thereby reducing the sealing process difficulty of the display. Improve the packaging efficiency of the display.

As shown in FIG. 1, some embodiments of the present disclosure provide a printing method that includes steps 1 and 2 (S1 and S2).

At S1, the printing screen is aligned with the printing area of the substrate to be printed.

At S2, the glass paste is scraped on the printing area of the substrate to be printed by the doctor blade along the strip extending direction of the first strip-shaped screen portion 1.

In the process of printing the glass paste by using the printing method provided by the embodiment of the present disclosure, a doctor blade is used to apply a scraping on the printing screen along the strip extending direction of the first strip-shaped screen portion 1 to print on the substrate to be printed. When the glass paste is scraped on the area, since the strip extending direction of the first strip-shaped screen portion 1 is parallel to the printing direction, the strip-like extending direction of the second strip-shaped screen portion 2 is perpendicular to the printing direction, and therefore, the blade pair The pressure of the glass glue corresponding to the strip-shaped screen portion 1 is smaller than the pressure of the glass glue corresponding to the second strip-shaped screen portion 2. However, the number of meshes of the first strip-shaped screen portion 1 is smaller than the mesh number of the second strip-shaped screen portion 2, and the area of the grid unit 10 in the first strip-shaped screen portion 1 and the second strip-shaped screen portion 2 The area of the grid unit 20 is equal, and therefore, the area of each grid unit 10 in the first strip-shaped screen portion 1 per unit area is larger than the area of each grid unit 20 in the second strip-shaped screen portion 2 per unit area. The area is such that the area of all the hollowed out areas in the first strip-shaped screen portion 1 per unit area is larger than the area of all the hollowed out areas in the second strip-shaped screen portion 2 of the unit area, and therefore, the first strip-shaped net in the unit area In the case where the volume of the glass paste corresponding to the second strip-shaped screen portion 2 of the unit area is the same, the area of each grid unit 10 in the first strip-shaped screen portion 1 per unit area is larger than the unit area. The area of each of the grid cells 20 in the second strip-shaped screen portion 2, therefore, the glass paste height per unit area of the substrate is scraped on the substrate by the first strip-shaped screen portion 1 than through the second strip-shaped screen portion 2 The glass glue per unit area is scraped on the substrate to a low height. Therefore, in consideration of the pressure and the height of the glass glue, the height of the glass paste corresponding to the first strip-shaped screen portion 1 printed on the substrate and the corresponding second strip mesh can be completed after the glass paste is blown. The height difference of the height of the glass glue of the plate portion 2 is small, which improves the uniformity of the glass glue printed on the substrate, thereby reducing the sealing process difficulty of the display and improving the packaging efficiency of the display.

The above description is only some embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that are obvious to those skilled in the art within the scope of the present disclosure are intended to be included within the scope of the present disclosure. Therefore, the scope of protection of the present disclosure should be determined by the scope of the claims.

Claims

A printing screen that includes:

a first strip-shaped screen portion, the strip-shaped extending direction of the first strip-shaped screen portion is parallel to the printing direction; and

a second strip-shaped screen portion, the strip-shaped extending direction of the second strip-shaped screen portion is perpendicular to the printing direction, wherein

The mesh number of the first strip-shaped screen portion is smaller than the mesh number of the second strip-shaped screen portion, and the area of the grid unit in the first strip-shaped screen portion and the second strip-shaped net The area of the grid cells in the layout is equal.
The printing screen according to claim 1, wherein a difference between a mesh number of the second strip-shaped screen portion and a mesh number of the first strip-shaped screen portion is 75 to 100.
The printing screen according to claim 1 or 2, wherein the number of meshes of the second strip-shaped screen portion is 400, and the number of meshes of the first strip-shaped screen portion is 325.
The printing screen of claim 1 comprising:

Frame; and

a screen comprising a first strip of wire for forming the first strip portion and a second strip for forming the second strip portion, wherein the first Both the strip mesh and the second strip mesh are fixed to the frame.
The printing screen according to claim 4, further comprising a component mask disposed in the quadrilateral region of the first strip mesh and the second strip mesh.
The printing screen according to claim 5, wherein the quadrangular region is a rectangular region.
The printing screen according to claim 6, wherein the grid cells in the first strip-shaped screen portion and the grid cells in the second strip-shaped screen portion are rectangular grid cells.
A printing method comprising:

Aligning the printing screen of any one of claims 1 to 7 with a printing area of a substrate to be printed; and

The glass paste is scraped on the printing area of the substrate to be printed along the strip extending direction of the first strip-shaped screen portion by a doctor blade.