# US 10,770,677 B2 · Display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,770,677 B2 - Document ID: US10770677B2 - Status: Granted - Kind: B2 - Application number: 16/591,273 - Filed: 2019-10-02 - Published: 2020-04-09 - Granted: 2020-09-08 - Earliest claimed: 2018-10-08 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Hyo-Sung Lee; Mi-Jin Han - Web page: https://patentgrep.com/patent/US10770677B2 ## CPC - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - H10K 59/872: {Containers} - H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants} - H10K 71/40: Thermal treatment, e.g. annealing in the presence of a solvent vapour - H10K 59/87: {Passivation; Containers; Encapsulations} - H10K 2102/311: {Flexible OLED} - Y02E 10/549: Organic PV cells - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A display apparatus can include a flexible display panel including at least one bending area; a first mid-frame disposed on a rear surface of the flexible display panel at a central area of the flexible display panel based on the at least one bending area; a second mid-frame disposed on the rear surface of the flexible display panel at an edge area of the flexible display panel based on the at least one bending area, the second mid-frame being spaced apart from the first mid-frame; and a bending guide configured to maintain a bent angle between the first mid-frame and the second mid-frame. ## Claims ### Claim 1 A display apparatus comprising: a flexible display panel including at least one bending area; a first mid-frame disposed on a rear surface of the flexible display panel at a central area of the flexible display panel based on the at least one bending area; a second mid-frame disposed on the rear surface of the flexible display panel at an edge area of the flexible display panel based on the at least one bending area, the second mid-frame being spaced apart from the first mid-frame; and a bending guide configured to maintain a bent angle between the first mid-frame and the second mid-frame. ### Claim 2 (depends on 1) The display apparatus according to claim 1, further comprising a cover window disposed on an upper surface of the flexible display panel, wherein the cover window is coupled to the upper surface of the flexible display panel while in a partially hardened state by primary hardening, before bending of the at least one bending area of the flexible display panel. ### Claim 3 (depends on 2) The display apparatus according to claim 2, wherein the cover window is completely hardened by secondary hardening, after bending of the at least one bending area of the flexible display panel. ### Claim 4 (depends on 1) The display apparatus according to claim 1, further comprising a third mid-frame disposed in a space between the first mid-frame and the second mid-frame to integrally connect the first mid-frame and the second mid-frame, the space between the first mid-frame and the second mid-frame corresponding to the at least one bending area. ### Claim 5 (depends on 4) The display apparatus according to claim 4, wherein the third mid-frame includes a perforated pattern disposed along a longitudinal direction of the third mid-frame. ### Claim 6 (depends on 1) The display apparatus according to claim 1, wherein the bending guide is adhered to rear surfaces of the first mid-frame and the second mid-frame, as the flexible display panel is bent around the at least one bending area. ### Claim 7 (depends on 1) The display apparatus according to claim 1, wherein the bending guide includes a mold inserted into a space between the first mid-frame and the second mid-frame, during bending of the flexible display panel. ### Claim 8 (depends on 1) The display apparatus according to claim 1, wherein the bent angle between the first mid-frame and the second mid-frame is approximately 90 degrees. ### Claim 9 (depends on 1) The display apparatus according to claim 1, further comprising: a first adhesive member disposed between a first portion of the bending guide and the first mid-frame; a second adhesive member disposed between a second portion of the bending guide and the second mid-frame; and a first gap between the first mid-frame and the second mid-frame, wherein the first and second adhesive members are located at opposite sides of the first gap. ### Claim 10 (depends on 1) The display apparatus according to claim 1, wherein the bending guide is approximately “L” shaped. ### Claim 11 (depends on 1) The display apparatus according to claim 1, wherein an upper edge of the second mid-frame adjacent to a vertex of the bent angle is parallel and flush with an upper surface of the bending guide, and wherein a side edge of the first mid-frame adjacent to the vertex of the bent angle is parallel with a side surface of the bending guide closest to the vertex of the bent angle, the side edge of the first mid-frame and the side surface of the bending guide being non-flush relative to each other. ### Claim 12 A display apparatus comprising: a flexible display panel including at least one bending area; a first mid-frame disposed on a rear surface of the flexible display panel at a central area of the flexible display panel based on the at least one bending area; a second mid-frame disposed on the rear surface of the flexible display panel at an edge area of the flexible display panel based on the at least one bending area, the second mid-frame being spaced apart from the first mid-frame; and a cover window disposed on an upper surface of the flexible display panel, the cover window in a partially hardened state by primary hardening being coupled to the upper surface of the flexible display panel, before bending of the at least one bending area of the flexible display panel. ### Claim 13 (depends on 12) The display apparatus according to claim 12, further comprising a bending guide coupled to the first mid-frame and the second mid-frame to maintain a bent angle of the flexible display panel. ### Claim 14 (depends on 13) The display apparatus according to claim 13, further comprising: a first adhesive member disposed between a first portion of the bending guide and the first mid-frame; a second adhesive member disposed between a second portion of the bending guide and the second mid-frame; and a first gap between the first mid-frame and the second mid-frame, wherein the first and second adhesive members are located at opposite sides of the first gap. ### Claim 15 (depends on 12) The display apparatus according to claim 12, wherein the cover window is completely hardened by secondary hardening, after bending of the at least one bending area of the flexible display panel. ### Claim 16 (depends on 12) The display apparatus according to claim 12, further comprising a third mid-frame disposed in a space between the first mid-frame and the second mid-frame, the space between the first mid-frame and the second mid-frame corresponding to the at least one bending area, wherein the third mid-frame includes a perforated pattern disposed along a longitudinal direction of the third mid-frame. ### Claim 17 A method of manufacturing a display apparatus, the method comprising: performing a primary hardening treatment on a cover window to place the cover window in a partially hardened state; disposing the cover window on a flexible display panel, the flexible display panel having a bending area; disposing the flexible display panel and the cover window on a first mid-frame and a second mid-frame while the first and second mid-frames are spaced apart from each other and the cover window is in the partially hardened state; attaching the first and second mid-frames to a bending guide having a bent angle via at least one adhesive member by bending the cover window around the bent angle while in the partially hardened state; and performing a secondary hardening treatment on the cover window to place the cover window in a hardened state, after completion of the bending the cover window around the bent angle. ### Claim 18 (depends on 17) The method according to claim 17, wherein the attaching the first and second mid-frames to the bending guide includes: adhering a first adhesive member between the first mid-frame and an upper portion of the bending guide, and adhering a second adhesive member between the second mid-frame and a side portion of the bending guide. ### Claim 19 (depends on 17) The method according to claim 17, wherein the bent angle is approximately 90 degrees. ### Claim 20 (depends on 17) The method according to claim 17, wherein the bending guide is approximately “L” shaped.