# US 2019/0246512 A1 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0246512 A1 - Document ID: US20190246512A1 - Status: Published application - Kind: A1 - Application number: 16/387,128 - Filed: 2019-04-17 - Published: 2019-08-08 - Earliest claimed: 2015-11-27 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Jinha HEO; Dohyeon KIM; Inkeun RYU - Web page: https://patentgrep.com/patent/US20190246512A1 ## CPC - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - G06F 1/1675: {Miscellaneous details related to the relative movement between the different enclosures or enclosure parts} - G06F 1/1681: {Details related solely to hinges (hinge details related to the transmission of signals or power are classified in G06F1/1683)} - G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED} - H05K 1/028: {Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence)} - H05K 5/0217: {Mechanical details of casings (covers, lids, hoods or members for covering apertures H05K5/03)} - H05K 5/0226: {Hinges} - H05K 5/03: Covers - G02F 1/133305: {Flexible substrates, e.g. plastics, organic film} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - 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 - 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 ## Abstract A display device includes a housing; at least one roller positioned within the housing; a display portion including a display panel and a module cover; and an operating portion connected to one end of the display portion and to change a display portion's state, wherein the display panel and the module cover transition from a first state where the display panel and the module cover are wound around the at least one roller to a second state where the display panel and the module cover are unwound from the at least one roller, in contact with each other, and exposed out of the housing. The operating portion includes a motor assembly; a support, one end which is connected to one end of the display portion and an other end which is connected to the motor assembly; a transmission portion, one end of which is connected to the support; and an auxiliary link connected to the housing and connected to an other end of the transmission portion, the auxiliary link including a spring portion to exert force on the transmission portion. ## Claims ### Claim at position 1 1-20. (canceled) ### Claim 21 A display device comprising: a housing; a roller positioned in the housing and elongated; a display portion configured to wind around the roller when the roller is configured to rotate in a first direction, the display portion configured to unwind from the roller when the roller is configured to rotate in a second direction; a foldable link including a lower link pivotally connected to the housing and an upper link pivotally connected to an upper part of the display portion; a motor positioned in the housing and configured to pivot the lower link; and a driver positioned in the housing and configured to rotate the roller in the first direction. ### Claim 22 (depends on 21) The display device of claim 21, wherein the driver configures to rotate the roller in the first direction when the motor configures to pivot the lower link in a third direction of the lower link. ### Claim 23 (depends on 21) The display device of claim 21, wherein the roller is configured to rotate in the second direction when the motor configures to pivot the lower link in a fourth direction of the lower link. ### Claim 24 (depends on 23) The display device of claim 23, wherein the driver includes a belt configured to rotate the roller in the first direction when the motor configures to pivot the lower link in the third direction of the lower link. ### Claim 25 (depends on 24) The display device of claim 24, wherein the belt is configured to wind around the roller when the motor configures to pivot the lower link in the fourth direction of the lower link. ### Claim 26 (depends on 24) The display device of claim 24, wherein the belt is configured to unwind from the roller when the motor configures to pivot the lower link in the third direction of the lower link. ### Claim 27 (depends on 24) The display device of claim 24, wherein the belt includes an elastic body. ### Claim 28 (depends on 24) The display device of claim 24, wherein the roller is a first roller and the driver further includes a second roller positioned in the housing and opposite to the first roller, and wherein the belt links the first roller and the second roller. ### Claim 29 (depends on 28) The display device of claim 28, wherein the first roller is configured to rotate in the first direction when the belt configures to transfer power from the second roller to the first roller. ### Claim 30 (depends on 28) The display device of claim 28, further comprising a mount installed in the housing, wherein the first roller and the second roller are rotatably connected to the mount. ### Claim 31 (depends on 23) The display device of claim 23, wherein the driver includes a rolled constant spring configured to rotate in the housing and spaced apart from the roller, and wherein a part of the rolled constant spring is extended and wound around the roller. ### Claim 32 (depends on 31) The display device of claim 31, wherein the roller is configured to rotate in the first direction when the motor configures to pivot the lower link in the third direction of the lower link and a restoring force of the constant spring is transmitted to the roller. ### Claim 33 (depends on 31) The display device of claim 31, wherein a rotational direction of the roller and a rotational direction of the rolled constant spring are identical. ### Claim 34 (depends on 31) The display device of claim 31, wherein a rotational direction of the roller and a rotational direction of the rolled constant spring are opposite to each other. ### Claim 35 (depends on 31) The display device of claim 31, wherein a torque of the roller is larger than a torque of the rolled constant spring when the motor configures to pivot the lower link in the fourth direction of the lower link. ### Claim 36 (depends on 31) The display device of claim 31, further comprising a mount installed in the housing, wherein the roller and the rolled constant spring are rotatably connected to the mount. ### Claim 37 (depends on 23) The display device of claim 23, wherein the upper link configures to stand when the lower link is configured to pivot in the fourth direction of the lower link, and wherein the upper link configures to lie down when the lower link is configured to pivot in the third direction of the lower link. ### Claim 38 (depends on 22) The display device of claim 22, further comprising: a fastening portion configures to linearly move to a length direction of the roller; a spring pushing one side of the fastening portion; and a transmission portion having one side pivotally connected to the lower link and the other side pivotally connected to the other side of the fastening portion. ### Claim 39 (depends on 38) The display device of claim 38, wherein the transmission portion configures to stand when the lower link configures to pivot in the fourth direction of the lower link, and wherein the transmission portion configures to lie down when the lower link configures to pivot in the third direction of the link. ### Claim 40 (depends on 21) The display device of claim 21, wherein the display portion includes a display panel and a module cover covers a rear surface of the display panel.