# US 11,907,015 B2 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,907,015 B2 - Document ID: US11907015B2 - Status: Granted - Kind: B2 - Application number: 16/675,880 - Filed: 2019-11-06 - Published: 2020-05-21 - Granted: 2024-02-20 - Earliest claimed: 2018-11-15 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Hyunjoo Song; Jaekyung Choi - Web page: https://patentgrep.com/patent/US11907015B2 ## CPC - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - G03B 21/58: collapsible, e.g. foldable; of variable area - G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS ## Abstract A disclosed display device includes a display panel configured to display an image and a back cover on a rear surface of the display panel and including a magnetic material. The display device further includes a roller configured to wind or unwind the back cover and the display panel. ## Claims ### Claim 1 A display device, comprising: a display panel configured to display an image, the display panel including a substrate, a pixel unit on a rear surface of the substrate, and an encapsulating layer covering a rear surface and a side surface of the pixel unit; a back cover on a rear surface of the encapsulating layer of the display panel and including a magnetic material; a protective layer on a rear surface of the back cover facing away from the display panel and including an insulating material; a roller configured to wind or unwind the protective layer, the back cover, and the display panel together around the roller; a flexible film and a printed circuit board on the display panel and electrically connected to the display panel; and a shielding layer between the back cover and at least one of the flexible film and the printed circuit board, wherein the display panel and the back cover are coupled to each other in a wound state and in an unwound state, wherein the protective layer is disposed in an area overlapping the back cover, wherein the shielding layer shields the at least one of the flexible film and the printed circuit board from an interference caused by a magnetic property of the back cover, and wherein the shielding layer is formed of an insulating material. ### Claim 2 (depends on 1) The display device of claim 1, wherein the back cover includes a resin and a plurality of magnetic material particles dispersed in the resin. ### Claim 3 (depends on 1) The display device of claim 1, comprising a first area and a second area extending from the first area, wherein the display panel and the back cover are disposed in the first area, and wherein the flexible film and the printed circuit board are disposed in the second area. ### Claim 4 (depends on 3) The display device of claim 3, wherein the flexible film and the printed circuit board are disposed on the protective layer in the second area, and the back cover is not disposed in the second area in an unwound state. ### Claim 5 (depends on 4) The display device of claim 4, wherein the protective layer is fixed to the roller. ### Claim 6 (depends on 3) The display device of claim 3, wherein the shielding layer is disposed in the second area, and wherein the back cover is further disposed in the second area. ### Claim 7 (depends on 1) The display device of claim 1, wherein the back cover includes a center area and edge areas at respective lateral sides of the center area, the protective layer covering the center area and the edge areas of the back cover, and wherein a thickness of the back cover in the center area in a first direction perpendicular to the rear surface of the substrate is larger than a thickness of the back cover in the edge areas in the first direction, and a portion of the protective layer covering the edge areas has a larger thickness in the first direction than a portion of the protective layer covering the center area. ### Claim 8 (depends on 7) The display device of claim 7, further comprising: a reinforcing member on at least one of the edge areas of the back cover and contacting at least one side surface of the protective layer. ### Claim 9 (depends on 1) The display device of claim 1, wherein the back cover includes a plurality of separate back cover patterns spaced apart from each other. ### Claim 10 (depends on 1) The display device of claim 1, wherein the protective layer is configured to be disposed between the front surface of the display panel and the back cover and prevent the back cover from contacting the front surface of the display panel in a wound state around the roller. ### Claim 11 (depends on 1) The display device of claim 1, wherein the protective layer is an insulating layer formed of one or more insulating materials, wherein the display panel further includes: an encapsulating substrate including a metal material and covering a rear surface of the encapsulating layer without covering a side surface of the encapsulating layer; and an adhesive member between the encapsulating layer and the encapsulating substrate and covering the rear surface and a side surface of the encapsulating layer, the adhesive member bonding the encapsulating layer and the encapsulating substrate to each other, and wherein the encapsulating substrate covers a rear surface of the adhesive member without covering a side surface of the adhesive member. ### Claim 12 A display device, comprising: a display panel configured to display images and including a substrate, a pixel unit on a rear surface of the substrate, an encapsulating layer covering a rear surface and a side surface of the pixel unit, and an encapsulating substrate on a rear surface of the encapsulating layer; a back cover including a magnetic material and attached to a rear surface of the encapsulating substrate of the display panel, the encapsulating substrate including a metal material; a protective layer on a rear surface of the back cover facing away from the display panel and including an insulation material; a roller configured to wind or unwind the protective layer, the back cover, and the display panel together around the roller; a flexible film and a printed circuit board on the display panel and electrically connected to the display panel; and a shielding layer between the back cover and at least one of the flexible film and the printed circuit board, wherein the shielding layer shields the at least one of the flexible film and the printed circuit board from an interference caused by a magnetic property of the back cover, and wherein the shielding layer is formed of an insulating material. ### Claim 13 (depends on 12) The display device of claim 12, wherein: the flexible film is disposed on the back cover and connected to the display panel, the printed circuit board is disposed on the back cover and connected to the flexible film, and the back cover is fixed to the roller. ### Claim 14 (depends on 12) The display device of claim 12, wherein both edges of the back cover protrude from both edges of the display panel corresponding to both edges of the back cover. ### Claim 15 (depends on 12) The display device of claim 12, wherein: the flexible film is disposed on the protective layer and connected to the display panel, the printed circuit board is disposed on the protective layer and connected to the flexible film, and the protective layer is fixed to the roller. ### Claim 16 (depends on 12) The display device of claim 12, wherein the back cover includes a center area and an edge area at a lateral side of the center area, the protective layer covering the center area and the edge area of the back cover, and wherein a thickness of the back cover in the center area in a first direction perpendicular to the rear surface of the encapsulating substrate is larger than a thickness of the back cover in the edge area in the first direction, and a portion of the protective layer covering the edge area has a larger thickness in the first direction than a portion of the protective layer covering the center area. ### Claim 17 (depends on 16) The display device of claim 16, further comprising: a reinforcing member disposed on the edge area of the back cover and contacting a side surface of the protective layer. ### Claim 18 (depends on 12) The display device of claim 12, wherein the back cover includes a plurality of separate back cover patterns spaced apart from each other. ### Claim 19 (depends on 12) The display device of claim 12, wherein the protective layer is configured to be disposed between the front surface of the display panel and the back cover and prevent the back cover from contacting the front surface of the display panel in a wound state around the roller. ### Claim 20 (depends on 12) The display device of claim 12, wherein the protective layer is an insulating layer formed of one or more insulating materials, wherein the display panel further includes an adhesive member between the encapsulating layer and the encapsulating substrate and covering the rear surface and a side surface of the encapsulating layer, the adhesive member bonding the encapsulating layer and the encapsulating substrate to each other, and wherein the encapsulating substrate covers a rear surface of the adhesive member without covering a side surface of the adhesive member.