Abstract: The present disclosure provides a screen printing device, including a printing screen having a printing mesh and a mesh frame, and a squeegee blade, wherein the printing mesh has first and second longitudinal ends, first and second blank areas, and a printing portion with printed patterns between the first and second blank areas, which being movably connected to the mesh frame by a tension adjusting mechanism respectively and being provided with at least one tension sensor respectively approximate to the printing portion, wherein the device further has a control means for receiving a tension measurement value from the tension sensor and compare it with a reference value so as to control the tension adjustment mechanism to adjust the tension in the printing mesh. The disclosure further provides a method for adjusting the tension of the printing mesh of the screen printing device.

Abstract: The present disclosure provides a screen printing device, including a printing screen having a printing mesh and a mesh frame, and a squeegee blade, wherein the printing mesh has first and second longitudinal ends, first and second blank areas, and a printing portion with printed patterns between the first and second blank areas, which being movably connected to the mesh frame by a tension adjusting mechanism respectively and being provided with at least one tension sensor respectively approximate to the printing portion, wherein the device further has a control means for receiving a tension measurement value from the tension sensor and compare it with a reference value so as to control the tension adjustment mechanism to adjust the tension in the printing mesh. The disclosure further provides a method for adjusting the tension of the printing mesh of the screen printing device.

Abstract: The present disclosure relates to a method for packaging an OLED display panel, an OLED display panel and an OLED display device. The method for packaging an OLED display panel comprises: providing a substrate and a cover plate, and forming a covering layer on the substrate, wherein the covering layer has a concave structure. The method further comprises forming another covering layer having a convex structure or forming an adhesive on the cover plate, wherein a bump of the convex structure or the adhesive may be accommodated in a recess of the concave structure.

Abstract: A printing screen and a sealant printing method are provided. The printing screen includes a frame, a mesh/screen fixed on the frame, and a film formed on the mesh. The portion of the mesh that is not covered by the film forms a feeding port in a rectangular ring shape. The rectangular ring includes two opposite first sides and two opposite second sides. The width of an upper opening of the cross section across the first sides is less than or equal to that of an upper opening of the cross section across the second sides. At a first height, the area of the cross section across the first sides is greater than that of the cross section across the second sides, the first height being less than the thickness of the film. The printing screen and the sealant printing method solve the problem of poor height uniformity of sealants.

Abstract: An alignment method for screen printing process includes: attaching a transparent film on a to-be-printed substrate in such a manner that the transparent film covers at least a to-be-printed region of the to-be-printed substrate, forming a printed pattern including an alignment mark on the transparent film by using a screen printing plate to imprint printed material onto the transparent film, and comparing whether the alignment mark on the transparent film is aligned with an alignment mark on the to-be-printed substrate. When the alignment mark on the transparent film is aligned with the alignment mark on the to-be-printed substrate, it is determined that current positions of the screen printing plate and the to-be-printed substrate are final alignment positions. When the alignment mark on the transparent film is not aligned with the alignment mark on the to-be-printed substrate, the current position of the screen printing plate or the to-be-printed substrate is adjusted.

Abstract: The present disclosure relates to a method for packaging an OLED display panel, an OLED display panel and an OLED display device. The method for packaging an OLED display panel comprises: providing a substrate and a cover plate, and forming a covering layer on the substrate, wherein the covering layer has a concave structure. The method further comprises forming another covering layer having a convex structure or forming an adhesive on the cover plate, wherein a bump of the convex structure or the adhesive may be accommodated in a recess of the concave structure.

Abstract: A printing screen and a sealant printing method are provided. The printing screen includes a frame, a mesh/screen fixed on the frame, and a film formed on the mesh. The portion of the mesh that is not covered by the film forms a feeding port in a rectangular ring shape. The rectangular ring includes two opposite first sides and two opposite second sides. The width of an upper opening of the cross section across the first sides is less than or equal to that of an upper opening of the cross section across the second sides. At a first height, the area of the cross section across the first sides is greater than that of the cross section across the second sides, the first height being less than the thickness of the film. The printing screen and the sealant printing method solve the problem of poor height uniformity of sealants.