# US 11,310,925 B2 · Display device with rollable display panel and operation method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,925 B2 - Document ID: US11310925B2 - Status: Granted - Kind: B2 - Application number: 16/821,512 - Filed: 2020-03-17 - Published: 2020-12-03 - Granted: 2022-04-19 - Earliest claimed: 2019-05-30 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Sangjae Kim - Web page: https://patentgrep.com/patent/US11310925B2 ## CPC - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - G06F 1/1624: {with sliding enclosures, e.g. sliding keyboard or display} - G06F 1/1637: {Details related to the display arrangement, including those related to the mounting of the display in the housing} - G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED} - H05K 1/147: {at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit (H05K1/148 takes precedence)} - H05K 5/0217: {Mechanical details of casings (covers, lids, hoods or members for covering apertures H05K5/03)} - H05K 2201/10128: Display - 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 ## Abstract A display device includes a rollable display panel having a first end portion and a second end portion spaced apart from the first end portion, a first roller configured to roll the first end portion, and a second roller configured to roll the second end portion. The second end portion of the rollable display panel may include a transmissive region which external light may pass through. An operation method of the display device includes determining an operation mode, rolling the rollable display panel in a first rotation direction so that the transmissive region is not exposed outside in a first display mode, rolling the rollable display panel in a second rotation direction so that the transmissive region is exposed outside in a second display mode, and displaying an image in a display region exposed outside. ## Claims ### Claim 1 A display device comprising: a rollable display panel comprising a first end portion and a second end portion spaced apart from the first end portion; a first roller configured to roll the first end portion; a second roller configured to roll the second end portion, and a camera module, wherein the second end portion of the rollable display panel comprises a transmissive region which external light passes through, the camera module and the rollable display panel overlap each other, and the transmissive region ion and the camera module overlap each other in a first display mode. ### Claim 2 (depends on 1) The display device of claim 1, wherein the second end portion of the rollable display panel is rolled by the second roller in a second display mode, and the transmissive region of the second end portion is not exposed outside the display device in the second display mode. ### Claim 3 (depends on 1) The display device of claim 1, wherein the first end portion of the rollable display panel is rolled by the first roller in the first display mode, and the transmissive region of the second end portion is exposed to outside the display device in the first display mode. ### Claim 4 The display device of 1, wherein the first display mode is an operation mode of the camera module. ### Claim 5 (depends on 1) The display device of claim 1, wherein the camera module comprises at least one of a light emitting element and a photo sensor. ### Claim 6 (depends on 1) The display device of claim 1, wherein the rollable display panel comprises pixels, wherein the transmissive region does not comprise any of the pixels. ### Claim 7 (depends on 1) The display device of claim 1, further comprising a case configured to accommodate the rollable display panel, the first roller, and the second roller. ### Claim 8 (depends on 7) The display device of claim 7, further comprising an electronic part disposed inside the case, wherein the electronic part and the rollable display panel overlap each other. ### Claim 9 (depends on 7) The display device of claim 7, wherein the rollable display panel comprises: a display region exposed in a front direction of the case; and a non-display region adjacent to the display region. ### Claim 10 (depends on 8) The display device of claim 8, wherein the first roller and the second roller rotate in a clockwise direction or a counterclockwise direction to move the rollable display panel in the clockwise direction or the counterclockwise direction. ### Claim 11 (depends on 10) The display device of claim 10, wherein the first roller and the second roller rotate in the clockwise direction or the counterclockwise direction within a range in which the transmissive region of the second end portion is not exposed outside the display device. ### Claim 12 (depends on 10) The display device of claim 10, wherein the first roller and the second roller rotate in the clockwise direction or the counterclockwise direction in a non-light emitting mode of the rollable display panel. ### Claim 13 (depends on 10) The display device of claim 10, wherein a position of a display region in the rollable display panel changes in accordance with a rotation direction and a rotation distance when the first roller and the second roller rotate in the clockwise direction or the counterclockwise direction. ### Claim 14 (depends on 1) The display device of claim 1, wherein a first radius of rotation of the first roller and a second radius of rotation of the second roller are equal to each other. ### Claim 15 (depends on 1) The display device of claim 1, further comprising a power supply disposed inside at least one of the first roller or the second roller. ### Claim 16 (depends on 1) The display device of claim 1, further comprising: a first board connected to the first end portion of the rollable display panel; and a second board electrically connected to the first board. ### Claim 17 An operation method of a display device comprising a rollable display panel comprising a first end portion and a second end portion which is spaced apart from the first end portion and includes a transmissive region, the operation method comprising: determining an operation mode; rolling the rollable display panel in a first rotation direction so that the transmissive region is not exposed outside the display device in a first display mode; rolling the rollable display panel in a second rotation direction so that the transmissive region is exposed outside the display device in a second display mode; and displaying an image in a display region of the rollable display panel, the display region being exposed outside the display device, wherein the display device further comprises a camera module, and the camera module and the transmissive region of the rollable display panel overlap each other in the second display mode. ### Claim 18 (depends on 17) The operation method of claim 17, further comprising rotating the rollable display panel in the first rotation direction or the second rotation direction in a non-light emitting mode of the rollable display panel.