# US 11,445,622 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 11,445,622 B2 - Document ID: US11445622B2 - Status: Granted - Kind: B2 - Application number: 17/180,786 - Filed: 2021-02-20 - Published: 2021-06-10 - Granted: 2022-09-13 - Earliest claimed: 2018-06-28 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Mi-Na Shin; ChounSung Kang; SunBok Song; GeunChang Park; Moonsun Lee - Web page: https://patentgrep.com/patent/US11445622B2 ## CPC - G02F 1/133305: {Flexible substrates, e.g. plastics, organic film} - G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED} - H05K 5/0217: {Mechanical details of casings (covers, lids, hoods or members for covering apertures H05K5/03)} - H05K 5/03: Covers - H10K 59/87: {Passivation; Containers; Encapsulations} - H10K 59/873: {Encapsulations} - H10K 2102/311: {Flexible OLED} - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A display device includes a display panel including a display area on which a plurality of display elements is disposed and a non-display area on which one or more wires for driving the plurality of display elements are disposed. A back cover is attached to one surface of the display panel and has a plurality of openings. A roller unit winds or unwinds the back cover and the display panel, and a lifting unit moves the back cover and the display panel in a vertical direction. The plurality of openings overlaps the display panel, and each of the plurality of openings is disposed to be staggered with one or more of the openings in an adjacent row. A size of the back cover is larger than a size of the display panel. ## Claims ### Claim 1 A display device, comprising: a display panel; a back cover attached to one surface of the display panel and having a plurality of openings; and a roller configured to wind or unwinds the back cover and the display panel in a first direction, wherein the back cover includes: a first support area which is an uppermost area of the back cover; a second support area which is a lowermost area of the back cover; a third support area between the first support area and the second support area; and a malleable area between the first support area and the third support area, and between the third support area and the second support area, the plurality of openings being disposed in the malleable area, and wherein the display panel overlaps a part of the malleable area between the first support area and the third support area. ### Claim 2 (depends on 1) The display device according to claim 1, further comprising: a lifting unit configured to move the back cover and the display panel in the first direction, wherein the lifting unit is fastened with the first support area of the back cover. ### Claim 3 (depends on 2) The display device according to claim 2, wherein the back cover further includes: a first fastening hole disposed in the first support area to fasten the first support area and the lifting unit with each other; and a second fastening hole disposed in second support area to fasten the second support area and the roller with each other. ### Claim 4 (depends on 1) The display device according to claim 1, further comprising: a flexible film electrically connected to the display panel; and a printed circuit board electrically connected to the flexible film, wherein the flexible film and the printed circuit board overlap the third support area. ### Claim 5 (depends on 4) The display device according to claim 4, wherein a width of the third support area in the first direction is larger than a width of the printed circuit board in the first direction. ### Claim 6 (depends on 1) The display device according to claim 1, wherein a size of the malleable area between the first support area and the third support area is larger than a size of the malleable area between the third support area and the second support area. ### Claim 7 (depends on 1) The display device according to claim 1, wherein an outer circumferential surface of the roller includes a flat portion, wherein, with the back cover and the display panel fully wound around the roller, the third support area overlaps the flat portion of the roller. ### Claim 8 (depends on 1) The display device according to claim 1, wherein a width of at least one of the plurality of openings in the first direction is smaller than a width of the at least one of the plurality of openings in a second direction, and each of the plurality of openings is disposed to be staggered with one or more of the openings in an adjacent row. ### Claim 9 (depends on 1) The display device according to claim 1, further comprising: a housing accommodating the back cover and the display panel, wherein, with the back cover fully unwound from the roller, the third support area is disposed inside the housing unit. ### Claim 10 (depends on 9) The display device according to claim 9, wherein, with the back cover fully unwound from the roller, the first support area and the malleable area between the first support area and the third support area are disposed outside the housing unit. ### Claim 11 (depends on 1) The display device according to claim 1, wherein a size of the back cover is larger than a size of the display panel. ### Claim 12 (depends on 11) The display device according to claim 11, wherein the display panel includes: a display area on which a plurality of display elements is disposed; and a non-display area on which one or more wires for driving the plurality of display elements are disposed, and wherein each of a plurality of edges of the back cover corresponds to a respective one of a plurality of edges of the display panel and protrudes outside of the respective one of the plurality of edges of the display panel.