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.

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.

Disclosed are a screen printing stencil, a light guide plate and a display device. The screen printing stencil includes a pattern printing section arranged corresponding to a light guide plate to be printed, and at least one positioning mark hole arranged on the periphery of the pattern printing section. The light guide plate is manufactured using the screen printing stencil according to the embodiment of the invention by firstly aligning in position the pattern printing section of the screen printing stencil with the light guide plate to be printed, using the at least one positioning mark hole, and then printing on the light guide plate to be printed. A corresponding pattern of positioning marks is printed on the light guide plate in addition to the corresponding pattern. As compared with the prior art, the precision of aligning in position the screen printing stencil with the light guide plate to be printed can be improved to thereby improve the displaying quality of the display product.

Stencil frames for tensioning stencils of an angular shape are provided. The stencil frame comprises corner elements (2), edge elements (1), fastening elements (13) and tensioning devices with a tensioning device being associated with each edge element (1). The corner elements (2) each have two, mutually perpendicular, guiding profiles (12) which joined at an intersection of their axes and the edge elements (1) each have a uniaxial reception profile (11). Each reception profile (11) is connectable to two guiding profiles (12) by loose fit. Each tensioning device has at least one elastic element (5) and connects between two neighbouring corner elements (2). A line of force exerted by each tensioning device is parallel to the axis of its corresponding reception profile (11).

A powder film forming method includes the steps of: filling an opening with a powder, the opening being formed in a screen plate; and forming the powder film by generating an electric potential difference between the screen plate and a substrate so as to cause the powder, which is filling the opening, to move to the substrate.

Disclosed herein are apparatuses for screen printing on a surface of a three-dimensional substrate comprising a substantially rigid, substantially planar frame having a perimeter defining a region within the perimeter having a given surface area; and a screen attached to the frame and extending across at least a portion of the surface area, wherein the screen comprises a first portion through which a liquid printing medium can pass onto a proximate three-dimensional substrate; and a second portion coated with an emulsion substantially preventing the liquid printing medium from passing through the second portion of the screen, wherein the screen has a fixed tension of less than about 20 N/cm. Methods and systems for screen printing on a surface of a three-dimensional substrate are also disclosed herein.

The present invention provides an OLED panel and a method for fabricating the same, a screen printing plate, and a display device. The method comprises: forming an OLED mother board, wherein supporting adhesive is formed between an upper base plate and a lower base plate of the OLED mother board, and said supporting adhesive is located below a cutting line; and cutting said OLED mother board along said cutting line to obtain OLED panels. In the fabricating method of the present invention, when the OLED mother board is cut by a cutter wheel, the upper and lower base plate of the OLED mother board is subject to small deformation due to support of the supporting adhesive. As a result, travelling accuracy of the cutter wheel is improved, the distance between the cutting line and packaging adhesive is greatly reduced, and the frame width of the fabricated OLED panel is far less than that of an OLED panel fabricated by a conventional method.

The present invention provides an OLED panel and a method for fabricating the same, a screen printing plate, and a display device. The method comprises: forming an OLED mother board, wherein supporting adhesive is formed between an upper base plate and a lower base plate of the OLED mother board, and said supporting adhesive is located below a cutting line; and cutting said OLED mother board along said cutting line to obtain OLED panels. In the fabricating method of the present invention, when the OLED mother board is cut by a cutter wheel, the upper and lower base plate of the OLED mother board is subject to small deformation due to support of the supporting adhesive. As a result, travelling accuracy of the cutter wheel is improved, the distance between the cutting line and packaging adhesive is greatly reduced, and the frame width of the fabricated OLED panel is far less than that of an OLED panel fabricated by a conventional method.

In a mask printing machine, a target through hole, which is at least one of multiple through holes formed on the mask, is imaged by an imaging device when the board is below the mask and is at a separated position that is separated from the mask, and when the board is at a contact position in which an upper surface of the board contacts a lower surface of the mask, respectively. Based on a captured image, when the board is at the separated position, and a captured image when the board is at the contact position, it is possible to acquire the movement state of at least one target through hole when the board is lifted from the separated position to the contact position.

In a mask printing machine, a target through hole, which is at least one of multiple through holes formed on the mask, is imaged by an imaging device when the board is below the mask and is at a separated position that is separated from the mask, and when the board is at a contact position in which an upper surface of the board contacts a lower surface of the mask, respectively. Based on a captured image, when the board is at the separated position, and a captured image when the board is at the contact position, it is possible to acquire the movement state of at least one target through hole when the board is lifted from the separated position to the contact position.