# US 2021/0242420 A1 · Rollable display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242420 A1 - Document ID: US20210242420A1 - Status: Published application - Kind: A1 - Application number: 17/048,705 - Filed: 2020-04-24 - Published: 2021-08-05 - Earliest claimed: 2019-04-25 - Assignees: Boe Technology Group Co., Ltd. - Applicants: Boe Technology Group Co., Ltd. - Inventors: Xiaofei LUO; Shangchieh CHU; Hong ZHU; Yanyan YANG; Baofeng SUN - Web page: https://patentgrep.com/patent/US20210242420A1 ## CPC - G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED} - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - H05K 5/0217: {Mechanical details of casings (covers, lids, hoods or members for covering apertures H05K5/03)} - H10K 59/871: {Self-supporting sealing arrangements} - H10K 77/111: {Flexible substrates} - H10K 2102/311: {Flexible OLED} - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract The present disclosure discloses a rollable display device, including: a flexible display panel; a reel connected to one end of the flexible display panel, around which the flexible display panel is rollable and extendable; a support structure arranged on two side edges of the flexible display panel in a rolling direction thereof, and provided with a first fixing portion; wherein the reel is provided with a second fixing portion matched with the first fixing portion for fixing the support structure and the reel when the flexible display panel is rolled. ## Claims ### Claim 1 A rollable display device comprising: a flexible display panel; a reel connected to one end of the flexible display panel, around which the flexible display panel is rollable and extendable; a support structure arranged on two side edges of the flexible display panel in a rolling direction, and provided with a first fixing portion; wherein the reel is provided with a second fixing portion matched with the first fixing portion for fixing the support structure and the reel when the flexible display panel is rolled. ### Claim 2 (depends on 1) The rollable display device according to claim 1, wherein the support structure is configured as a strip structure, and is arranged around the two side edges of the flexible display panel. ### Claim 3 (depends on 2) The rollable display device according to claim 2, wherein the support structure is continuously arranged on the two side edges of the flexible display panel in the rolling direction, or the support structure is arranged at intervals on the two side edges of the flexible display panel in the rolling direction. ### Claim 4 (depends on 3) The rollable display device according to claim 3, wherein the support structure comprises a support protective layer and a flexible cover arranged on the support protective layer in a stacked mode; and the support protective layer is made of a flexible material with preset elasticity. ### Claim 5 (depends on 4) The rollable display device according to claim 4, wherein the support protective layer in the support structure has an elastic modulus gradually increased from a first end to a second end of the support structure; and the first end of the support structure is an end close to the reel. ### Claim 6 (depends on 1) The rollable display device according to claim 1, wherein the second fixing portion comprises protruding structures arranged at two ends of the reel and uniformly distributed around a circumference of the reel; and the first fixing portion comprises a plurality of through holes arranged on the support structure and matched with the protruding structures. ### Claim 7 (depends on 6) The rollable display device according to claim 6, wherein a distance between adjacent through holes on a first side of a preset position on the support structure is smaller than a distance between adjacent through holes on a second side of the preset position; and the preset position is a position at which a rolling radius of the flexible display panel is increased, the first side of the preset position is a side of the preset position close to the reel, and the second side of the preset position is a side of the preset position away from the reel. ### Claim 8 (depends on 7) The rollable display device according to claim 7, wherein each of the protruding structures has a diameter gradually reduced from a first end to a second end of the protruding structure; and the first end of the protruding structure is an end connected to the reel. ### Claim 9 (depends on 8) The rollable display device according to claim 8, wherein each of the through holes on the first side of the preset position on the support structure has a size larger than each of the through holes on the second side of the preset position. ### Claim 10 (depends on 1) The rollable display device according to claim 1, wherein the flexible display panel comprises a flexible substrate, and a light emitting layer and a flexible cover which are sequentially stacked on the flexible substrate; and wherein the flexible cover has a thickness not less than the flexible substrate. ### Claim 11 (depends on 10) The rollable display device according to claim 10, wherein the flexible display panel and the support structure have the same thickness.