# US 11,442,564 B2 · Touch display device and preparation method thereof, and terminal equipment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,442,564 B2 - Document ID: US11442564B2 - Status: Granted - Kind: B2 - Application number: 17/040,864 - Filed: 2020-03-26 - Published: 2021-01-21 - Granted: 2022-09-13 - Earliest claimed: 2019-04-25 - Assignees: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Co., Ltd. - Applicants: Chengdu BOE Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd. - Inventors: Bing Ji; Xiaoxia Huang - Web page: https://patentgrep.com/patent/US11442564B2 ## CPC - G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means - G06F 2203/04102: Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper - G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract The present disclosure relates to the technical field of display devices, and discloses a touch display device and a fabrication method thereof, and terminal equipment. The touch display device includes: a cover plate; a mold frame, including a bottom and an extended part, wherein the bottom and the extended part define a groove; adhesive, located at the end part of the extended part; a touch display module, located in the groove and including a display panel and a touch panel located at the side, facing the cover plate, of the display panel; and a touch flexible printed circuit board, bound to a side edge of the side, facing away from the display panel, of the touch panel and bent to the side, facing away from the touch panel, of the display panel, wherein the touch flexible printed circuit board is provided with a plurality of through holes at the area other than the binding position. The touch display device has the advantage that the size of the border is effectively reduced, thereby providing a feasible technical solution for fabricating full-screen terminals. ## Claims ### Claim 1 A touch display device, comprising: a cover plate; a mold frame, comprising a bottom and an extended part, wherein the extended part is connected with an edge of the bottom and extends to one side of the cover plate, and the bottom and the extended part define a groove; adhesive, located at an end part of the extended part; a touch display module, located in the groove, wherein the touch display module comprises a display panel and a touch panel, wherein the touch panel is located at a side, facing the cover plate, of the display panel; and a touch flexible printed circuit board, bound to a side edge of a face, facing away from the display panel, of the touch panel and bent to a side, facing away from the touch panel, of the display panel, wherein the touch flexible printed circuit board comprises a plurality of through holes at an area other than a binding position and is configured to allow the adhesive to overflow to an area outside the extended part through the through holes when the cover plate and the mold frame are to be bonded together, so that the cover plate and the mold frame are bonded together by the adhesive at the extended part and the area outside the extended part; wherein the touch flexible printed circuit board comprises: first binding parts bound to a side, facing away from the display panel, of the touch panel; second binding parts bent to the side, facing away from the touch panel, of the display panel; and bent parts configured to connect the first binding parts with the second binding parts; wherein the through holes are formed in the bent parts; or the through holes comprise a plurality of first through holes formed in each first binding part and a plurality of second through holes formed in each second binding part. ### Claim 2 (depends on 1) The touch display device according to claim 1, wherein the first through holes are symmetric to the second through holes. ### Claim 3 (depends on 1) The touch display device according to claim 1, wherein the adhesive further covers an inner side wall of a side, facing the touch display module, of the extended part. ### Claim 4 (depends on 3) The touch display device according to claim 3, wherein the adhesive further covers part of the bottom. ### Claim 5 (depends on 4) The touch display device according to claim 4, wherein an orthographic projection of the adhesive on the bottom is overlapped with the touch flexible printed circuit board. ### Claim 6 (depends on 1) The touch display device according to claim 1, wherein the display panel comprises: a first display part opposite to the touch panel; a second display part bent to a back of the display panel; and a third display part configured to connect the first display part with the second display part; wherein the second binding parts are located on a side, facing the bottom, of the second display part. ### Claim 7 (depends on 6) The touch display device according to claim 6, wherein the touch display device further comprises a coating covering the third display part, and a gap is formed between the adhesive and the coating. ### Claim 8 (depends on 7) The touch display device according to claim 7, wherein the touch display module further comprises: a first back film, located on a side, facing away from the touch panel, of the first display part; a second back film, located on a side, facing the touch panel, of the second display part; a heat radiating film, located on a side, facing away from the first display part, of the first back film; and first glue, located between the heat radiating film and the second back film. ### Claim 9 (depends on 7) The touch display device according to claim 7, wherein the touch display module further comprises: a chip on film, comprising: a first flip-chip part, a second flip-chip part, and a third flip-chip part configured to connect the first flip-chip part with the second flip-chip part. ### Claim 10 (depends on 9) The touch display device according to claim 9, wherein the first flip-chip part is located between the second binding parts and the second display part, and the second flip-chip part is attached to a face, facing the bottom, of the heat radiating film. ### Claim 11 (depends on 10) The touch display device according to claim 10, wherein the touch display module further comprises: a polarizer, located on the side, facing away from the display panel, of the touch panel; second glue, located between the polarizer and the touch panel; and third glue, located between the polarizer and the cover plate. ### Claim 12 (depends on 1) A method for preparing the touch display device according to claim 1, comprising: providing the touch display module; binding the touch flexible printed circuit board to a side edge of the touch display module; placing the touch display module to which the touch flexible printed circuit board is bound in the groove of a mold frame; forming adhesive at the end part of the extended part of the mold frame; and bonding the cover plate and the mold frame oppositely, so that the adhesive covers the end part of the extended part, and overflows to a side, facing the touch display module, of the extended part through the through holes in the touch flexible printed circuit board, thereby sticking the cover plate to the mold frame. ### Claim 13 (depends on 12) The method according to claim 12, wherein said binding the touch flexible printed circuit board to the side edge of the touch display module comprises: binding a flat touch flexible printed circuit board to the touch panel, wherein parts, in contact with the touch panel, of the touch flexible printed circuit board are used as first binding parts; forming second binding parts, facing away from the touch panel, of the display panel and bent parts configured to connect the first binding parts with the second binding parts by bending the area, protruding from the display panel, of the flat touch flexible printed circuit board inversely towards the side, facing away from the touch panel, of the display panel; and forming the plurality of through holes by punching the first binding parts and the second binding parts by punching equipment. ### Claim 14 (depends on 12) The method according to claim 12, wherein said binding the touch flexible printed circuit board to the side edge of the touch display module comprises: binding a flat touch flexible printed circuit board to the touch panel, wherein the flat touch flexible printed circuit board comprises preset bending areas, the preset bending areas protrude from the display panel, and the plurality of through holes are formed in each preset bending area; and forming bent parts by bending the preset bending areas inversely towards the side, facing away from the touch panel, of the display panel. ### Claim 15 Terminal equipment, comprising a touch display device, wherein the touch display device comprises: a cover plate; a mold frame, comprising a bottom and an extended part, wherein the extended part is connected with an edge of the bottom and extends to one side of the cover plate, and the bottom and the extended part define a groove; adhesive, located at an end part of the extended part; a touch display module, located in the groove, wherein the touch display module comprises a display panel and a touch panel, wherein the touch panel is located at a side, facing the cover plate, of the display panel; and a touch flexible printed circuit board, bound to a side edge of a face, facing away from the display panel, of the touch panel and bent to a side, facing away from the touch panel, of the display panel, wherein the touch flexible printed circuit board comprises a plurality of through holes at an area other than a binding position and is configured to allow the adhesive to overflow to an area outside the extended part through the through holes when the cover plate and the mold frame are to be bonded together, so that the cover plate and the mold frame are bonded together by the adhesive at the extended part and the area outside the extended part; wherein the touch flexible printed circuit board comprises: first binding parts bound to a side, facing away from the display panel, of the touch panel; second binding parts bent to the side, facing away from the touch panel, of the display panel; and bent parts configured to connect the first binding parts with the second binding parts; wherein the through holes are formed in the bent parts; or the through holes comprise a plurality of first through holes formed in each first binding part and a plurality of second through holes formed in each second binding part.