# US 12,216,244 B2 · Flexible display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,216,244 B2 - Document ID: US12216244B2 - Status: Granted - Kind: B2 - Application number: 17/858,681 - Filed: 2022-07-06 - Published: 2023-01-19 - Granted: 2025-02-04 - Earliest claimed: 2021-07-08 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Wansoo Lee; Youngjoo Park; ByoungHar Hwang; Taehyoung Kwak; Changwoo Chun - Web page: https://patentgrep.com/patent/US12216244B2 ## CPC - G02B 1/14: Protective coatings, e.g. hard coatings - G02B 1/04: made of organic materials, e.g. plastics (G02B1/08 takes precedence) - G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED} - H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants} - G06F 1/16: Constructional details or arrangements - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract The present disclosure relates to a flexible display device, and more particularly, a flexible display device includes a display panel, and a cover member which is disposed on the display panel and includes a thin glass and an adhesive member disposed so as to enclose the thin glass, at this time, the adhesive member includes a first adhesive member disposed so as to enclose an upper surface and a side surface of the thin glass and a second adhesive member disposed on a lower surface of the thin glass. According to the present disclosure, the flexible display device disposes a protective film above the cover member to provide a scattering suppressing effect and improve a surface hardness, a compression characteristic, the impact resistance and folding characteristic. ## Claims ### Claim 1 A flexible display device, comprising: a display panel; and a cover member which is disposed on the display panel and includes a thin glass and an adhesive member disposed so as to enclose the thin glass, wherein the adhesive member includes a first adhesive member disposed so as to enclose an upper surface and a side surface of the thin glass and a second adhesive member disposed on a lower surface of the thin glass, wherein the display panel is divided into a display area and a non-display area which encloses the display area, and the flexible display device includes a decoration pattern disposed above or below the thin glass so as to overlap the non-display area. ### Claim 2 (depends on 1) The flexible display device according to claim 1, wherein a Young's modulus of the first adhesive member is equal to a Young's modulus of the second adhesive member. ### Claim 3 (depends on 2) The flexible display device according to claim 2, wherein the first adhesive member and the second adhesive member are formed of the same material. ### Claim 4 (depends on 1) The flexible display device according to claim 1, wherein a Young's modulus of the first adhesive member is different from a Young's modulus of the second adhesive member. ### Claim 5 (depends on 4) The flexible display device according to claim 4, wherein the flexible display device includes a folding area and non-folding areas on both sides of the folding area, the folding area is folded in an in-folding manner that a display surface of the flexible display device faces inward, and the Young's modulus of the first adhesive member is larger than the Young's modulus of the second adhesive member. ### Claim 6 (depends on 5) The flexible display device according to claim 5, wherein the Young's modulus of the first adhesive member is 7000 MPa to 10000 MPa, and the Young's modulus of the second adhesive member is 500 MPa to 3000 MPa. ### Claim 7 (depends on 4) The flexible display device according to claim 4, wherein the flexible display device includes a folding area and non-folding areas on both sides of the folding area, the folding area is folded in an out-folding manner that a display surface of the flexible display device faces outward, and the Young's modulus of the first adhesive member is smaller than the Young's modulus of the second adhesive member. ### Claim 8 (depends on 7) The flexible display device according to claim 7, wherein the Young's modulus of the first adhesive member is 500 MPa to 3000 MPa, and the Young's modulus of the second adhesive member is 7000 MPa to 10000 MPa. ### Claim 9 (depends on 1) The flexible display device according to claim 1, wherein the adhesive member is formed of an optical clear resin. ### Claim 10 (depends on 1) The flexible display device according to claim 1, further comprising: a protective film disposed on the cover member. ### Claim 11 (depends on 10) The flexible display device according to claim 10, wherein a width and a length of the cover member are equal to a width and a length of the protective film, respectively. ### Claim 12 (depends on 10) The flexible display device according to claim 10, wherein the protective film is a plastic film including at least one selected from polyethylene terephthalate, polyethylene naphthalate, polyethylene, polymethyl methacrylate, polyimide, polyamideimide, polycarbonate, cycloolefin polymer and cycloolefin copolymer. ### Claim 13 (depends on 10) The flexible display device according to claim 10, comprising: a hard coating layer disposed on at least one surface of the protective film. ### Claim 14 (depends on 13) The flexible display device according to claim 13, wherein the hard coating layer includes a first hard coating layer disposed on an upper surface of the protective film and a second hard coating layer disposed on a lower surface of the protective film. ### Claim 15 (depends on 14) The flexible display device according to claim 14, wherein the first hard coating layer includes an acrylic resin, and the second hard coating layer includes a silicone resin. ### Claim 16 (depends on 15) The flexible display device according to claim 15, wherein the silicone resin is an epoxy modified silicone resin. ### Claim 17 (depends on 14) The flexible display device according to claim 14, wherein a thickness of the first hard coating layer is 5 μm to 20 μm and a thickness of the second hard coating layer is 30 μm to 60 μm. ### Claim 18 (depends on 1) The flexible display device according to claim 1, wherein the decoration pattern is disposed on one surface of the thin glass so as to overlap the non-display area. ### Claim 19 (depends on 10) The flexible display device according to claim 10, wherein the decoration pattern is disposed on a lower surface of the protective film so as to overlap the non-display area. ### Claim 20 (depends on 1) The flexible display device according to claim 1, wherein a thickness of the thin glass is 0.1 mm or smaller.