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CN-115955861-B - Display module and manufacturing method thereof

CN115955861BCN 115955861 BCN115955861 BCN 115955861BCN-115955861-B

Abstract

The application discloses a display module and a manufacturing method thereof, wherein the display module comprises a display panel, a touch panel and a cover plate which are sequentially stacked, and further comprises a first flexible circuit board and a second flexible circuit board, wherein in a flattened state, one sides of the first flexible circuit board and the second cover plate part facing the first flexible circuit board are provided with a distance or are provided with contact surfaces, when the contact surfaces are formed, the orthographic projection area of the contact surfaces on the second cover plate part occupies 1/8-1/5 of the area of the second cover plate part, and the display module improves the reliability of the flexible circuit board, reduces the stripping probability of the cover plate and the probability of generating bubbles in a display area.

Inventors

  • LU JINGRU

Assignees

  • 昆山国显光电有限公司

Dates

Publication Date
20260508
Application Date
20221130

Claims (14)

  1. 1. A display module, comprising: The touch panel comprises a display panel, a touch panel and a cover plate which are sequentially stacked, wherein in the length direction of the cover plate, the cover plate comprises a first cover plate part and a second cover plate part which are connected with each other, the orthographic projection of the first cover plate part on the plane where the touch panel is located is positioned in the touch panel, and the orthographic projection of the second cover plate part on the plane where the touch panel is located is positioned outside the touch panel; The first flexible circuit board comprises a first panel bonding end, a first transmission section and a first driving bonding end which are sequentially connected in the length direction of the first flexible circuit board, and the first panel bonding end is connected with the touch panel in a bonding way; The second flexible circuit board comprises a second panel bonding end, a second transmission section and a second driving bonding end which are sequentially connected in the length direction of the second flexible circuit board, wherein the second panel bonding end is in bonding connection with the array layer of the display panel, and the second driving bonding end is in bonding connection with the first driving bonding end; The first transmission section comprises a second part, wherein the orthographic projection of the second part on the cover plate is positioned in the second cover plate part, a profiling part is fixed on one side of the second part, which faces away from the cover plate, and a second cambered surface protruding towards the second part is arranged on one side of the profiling part, which faces towards the second part; so that the second flexible circuit board is in a flattened state, a side of the first flexible circuit board, which faces the first flexible circuit board, and the second cover plate part are provided with a space or contact surfaces, when the contact surface is formed, the orthographic projection area of the contact surface on the second cover plate part occupies 1/8-1/5 of the area of the second cover plate part.
  2. 2. The display module assembly of claim 1, wherein the display module assembly comprises, When the second cover plate part faces one side of the first flexible circuit board, a groove for accommodating at least part of the first flexible circuit board is formed in the side of the second cover plate part, and the surface of the groove is a first cambered surface which is far away from the first flexible circuit board and concave inwards.
  3. 3. The display module assembly of claim 2, wherein the width of the first cambered surface is 0.1mm-0.3mm in the length direction of the cover plate.
  4. 4. The display module assembly of claim 2, wherein the depth of the first arcuate surface is 0.1mm-0.2mm.
  5. 5. The display module assembly of claim 1, wherein the display module assembly comprises, When the first transmission section comprises a second part, the orthographic projection of the second part on the cover plate is positioned in the second cover plate part, a profiling part is fixed on one side of the second part, which faces away from the cover plate, and a second cambered surface protruding towards the second part is arranged on one side of the profiling part, which faces towards the second part; And the width of the second cambered surface is 2mm-4mm in the length direction of the profiling piece.
  6. 6. The display module assembly of claim 5, wherein the maximum height of the cam is 0.2mm to 0.4mm.
  7. 7. The display module assembly of claim 5, wherein the display module assembly comprises, And one side of the profiling piece, which at least partially faces the second flexible circuit board, is fixedly connected with the second flexible circuit board.
  8. 8. The display module of claim 7, wherein an orthographic projection of the profile on the second flexible circuit board is located beyond the second panel bonding end.
  9. 9. The display module assembly of claim 7, wherein a side of the profiling facing the second flexible circuit board is a cambered surface recessed away from the second flexible circuit board.
  10. 10. A manufacturing method of display module is characterized in that, Connecting a first panel bonding end of a first flexible circuit board with the touch panel bonding, and connecting a second panel bonding end of a second flexible circuit board with the array layer bonding; The touch panel is provided with a cover plate at one side of the first flexible circuit board, wherein the cover plate comprises a first cover plate part and a second cover plate part which are mutually connected in the length direction of the cover plate, the orthographic projection of the first cover plate part on the plane of the touch panel is positioned in the touch panel, and the orthographic projection of the second cover plate part on the plane of the touch panel is positioned outside the touch panel; The first flexible circuit board further comprises a second part, wherein the orthographic projection of the second part on the cover plate is positioned in the second cover plate part, and a profiling part is arranged and fixed on one side of the second part, which is away from the cover plate, and the side of the profiling part, which faces the second part, is a second cambered surface protruding towards the second part; Bonding the first drive bonding end of the first flexible circuit board with the second drive bonding end of the second flexible circuit board; and bending the first flexible circuit board and the second flexible circuit board.
  11. 11. The method of manufacturing of claim 10, wherein the bending the first flexible circuit board further comprises: And removing the profiling piece.
  12. 12. The method of manufacturing according to claim 11, wherein the providing and fixing of the profile on the side of the second portion facing away from the cover plate comprises: Disposing a gel between the cam and the second portion, the gel comprising an ultraviolet curable material; Said removing said profiling comprises: The colloid is irradiated by ultraviolet light, so that the second part is separated from the profiling piece.
  13. 13. The method of manufacturing according to claim 11, wherein the providing and fixing of the profile on the side of the second portion facing away from the cover plate comprises: disposing a gel between the cam and the second portion, the gel comprising a temperature sensitive material; Said removing said profiling comprises: increasing or decreasing the gel temperature, separating the second portion from the cam.
  14. 14. The method of manufacturing according to claim 11, wherein the providing and fixing of the profile on the side of the second portion facing away from the cover plate comprises: Providing a magnetic field between the cam and a second portion, wherein the cam comprises a ferromagnetic material, causing the cam to be attracted to the second portion; Said removing said profiling comprises: And removing the magnetic field or performing magnetic field interference to separate the second part from the profiling piece.

Description

Display module and manufacturing method thereof Technical Field The present application relates to the field of display technologies, and in particular, to a display module and a method for manufacturing the display module. Background Along with the continuous maturation of flexible OLED display technology, borderless display has become mainstream in the market, and borderless display is to utilize flexible circuit board, with partial winding displacement or control chip buckle to the screen body below to realize the shrink of non-display area. For a display device with a touch screen function, the display module includes flexible circuit boards (FPCs) bonded with the touch layer and the array layer respectively, and because bonding positions of the two flexible circuit boards are different in a stacking direction, bending radii of the two flexible circuit boards need to be different, so that the length of the flexible circuit board on the outer side is greater than that of the flexible circuit board on the inner side. Because the two lengths are different, under the flat state before buckling, the condition that upwards bulges can appear in the flexible circuit board that is in the outer layer, and when the high cover internal surface that surpasses of bulge, flexible circuit board exerts pressure to the apron of top, leads to the apron to come unstuck perk, causes the air inlet in the display area, produces the bubble that is difficult to eliminate. Disclosure of Invention The application mainly solves the technical problems of providing a display module and a manufacturing method thereof, improving the reliability of a flexible circuit board, reducing the stripping of a cover plate and reducing the probability of generating bubbles in a display area. In order to solve the technical problems, the display module comprises a display panel, a touch panel and a cover plate which are sequentially stacked, wherein the cover plate comprises a first cover plate part and a second cover plate part which are mutually connected in the length direction of the cover plate, the orthographic projection of the first cover plate part on a plane where the touch panel is positioned in the touch panel, the orthographic projection of the second cover plate part on the plane where the touch panel is positioned outside the touch panel, a first flexible circuit board comprises a first panel bonding end, a first transmission section and a first driving bonding end which are sequentially connected in the length direction of the first flexible circuit board, the first panel bonding end is connected with the touch panel in a bonding mode, the second flexible circuit board comprises a second panel bonding end, a second transmission section and a second driving bonding end which are sequentially connected in the length direction of the second flexible circuit board, the second panel bonding end is connected with the second panel bonding end, the second transmission section and the second driving end, the second flexible circuit board is connected with the second flexible circuit board, the first flexible circuit board is formed in a flat state, and the first flexible circuit board is connected with the second flexible circuit board, and the first flexible circuit board is in a flat state, and the flat circuit board is formed at the first side of the flat side (1). The manufacturing method comprises the steps of enabling a first panel bonding end of a first flexible circuit board to be connected with a touch panel in a bonding mode, enabling a second panel bonding end of a second flexible circuit board to be connected with an array layer in a bonding mode, arranging a cover plate on one side of the touch panel, which is provided with the first flexible circuit board, on the side of the touch panel, wherein in the length direction of the cover plate, the cover plate comprises a first cover plate portion and a second cover plate portion which are connected with each other, orthographic projection of the first cover plate portion on a plane of the touch panel is located in the touch panel, orthographic projection of the second cover plate portion on the plane of the touch panel is located outside the touch panel, orthographic projection of the second portion on the cover plate is located in the second cover plate portion, copying pieces are arranged on one side of the second portion, which is away from the cover plate, and fixed, and the second cambered surface faces the second end of the second flexible circuit board and is bonded to the second flexible circuit driving end of the second flexible circuit, and the second flexible circuit is enabled to be connected with the second curved end of the second flexible circuit bonding portion. The application has the beneficial effects that the first flexible circuit board and the cover plate are limited to have a distance when the display module is in a flattened state, so that the first flexibl