# US 12,762,992 B2 · Display device in which reference point is shifted in shift area based on route shift signal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,762,992 B2 - Document ID: US12762992B2 - Status: Granted - Kind: B2 - Application number: 18/732,257 - Filed: 2024-06-03 - Published: 2024-09-26 - Granted: 2026-10-13 - Earliest claimed: 2021-11-19 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Daye Moon; Bonggyun Kang; Kyoungho Lim; Heesook Park - Web page: https://patentgrep.com/patent/US12762992B2 ## CPC - G09G 3/2096: {Details of the interface to the display terminal specific for a flat panel (suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167)} - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G09G 2300/0413: Details of dummy pixels or dummy lines in flat panels - G09G 2310/0275: Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current - G09G 2320/0257: Reduction of after-image effects - G09G 2320/046: Dealing with screen burn-in prevention or compensation of the effects thereof - G09G 2330/021: Power management, e.g. power saving - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract A display device includes a display panel and a display image shift controller. The display panel includes a display area in which a display image is displayed and a shift area located within the display area. The display image shift controller generates a route shift signal, where a reference point of the display image is shifted in the shift area based on the route shift signal. The route shift signal includes first and second routes corresponding to a path through which the reference point of the display image is shifted. The first route includes a first sub-route and a second sub-route. The second route includes a third sub-route and a fourth sub-route. The first, second, third, and fourth sub-routes are different from each other. ## Claims ### Claim 1 A display device comprising: a display panel including a display area in which a display image is displayed and a shift area located within the display area; and a display panel driver configured to drive the display panel and to perform a display image shifting operation by shifting a reference point of the display image along a reference point shifting path in the shift area, wherein the reference point shifting path includes a first route including a first sub-route and a second sub-route which cross each other at a plurality of points and a second route including a third sub-route and a fourth sub-route which cross each other, the first, second, third, and fourth sub-routes being different from each other. ### Claim 2 (depends on 1) The display device of claim 1, wherein a path of the reference point corresponding to the first sub-route and a path of the reference point corresponding to the second sub-route cross each other, and wherein a path of the reference point corresponding to the third sub-route and a path of the reference point corresponding to the fourth sub-route cross each other. ### Claim 3 (depends on 1) The display device of claim 1, wherein, when the display image is continuously displayed on the display panel, the display panel driver shifts the reference point based on the first route or the second route after a preset time in a way such that the display image is entirely shifted. ### Claim 4 (depends on 1) The display device of claim 1, wherein the shift area has a grid shape having rows corresponding to imaginary horizontal lines and columns corresponding to imaginary vertical lines, wherein intersection points in which the imaginary horizontal lines intersect the imaginary vertical lines are defined in the shift area, wherein the reference point is located at one intersection point among the intersection points, and wherein the reference point located at the one intersection point is shifted to one of eight intersection points adjacent to the one intersection point after a preset time. ### Claim 5 (depends on 1) The display device of claim 1, wherein the reference point is initially located at a center of the display image. ### Claim 6 (depends on 1) The display device of claim 1, wherein the reference point is shifted based on the first sub-route in an order of a first direction, a second direction, a third direction, a fourth direction, the first direction, and the second direction, and wherein the reference point is shifted based on the second sub-route in an order of the first direction, the second direction, the third direction, the fourth direction, and the first direction. ### Claim 7 (depends on 6) The display device of claim 6, wherein the second sub-route starts after the first sub-route ends, wherein a start coordinate of the first sub-route and an end coordinate of the second sub-route are different from each other, and wherein a start coordinate of the second sub-route and the end coordinate of the second sub-route are identical to each other. ### Claim 8 (depends on 6) The display device of claim 6, wherein a center of the shift area is defined as a zeroth coordinate, and wherein a start coordinate of the first sub-route corresponds to the zeroth coordinate. ### Claim 9 (depends on 8) The display device of claim 8, wherein each of the first and second sub-routes has a rectangular shape rotated about the zeroth coordinate by a preset angle, wherein a first length of a minor axis of the first sub-route and a second length of a minor axis of the second sub-route are equal to each other, and wherein a first length of a major axis of the first sub-route and a second length of a major axis of the second sub-route are equal to each other. ### Claim 10 (depends on 1) The display device of claim 1, wherein the reference point is shifted based on the third sub-route in an order of a first direction, a second direction, a third direction, a fourth direction, the first direction, and the second direction, and wherein the reference point is shifted based on the fourth sub-route in an order of the first direction, the second direction, the third direction, the fourth direction, and the first direction. ### Claim 11 (depends on 10) The display device of claim 10, wherein the fourth sub-route starts after the third sub-route ends, wherein a start coordinate of the third sub-route and an end coordinate of the fourth sub-route are different from each other, and wherein a start coordinate of the fourth sub-route and the end coordinate of the fourth sub-route are identical to each other. ### Claim 12 (depends on 10) The display device of claim 10, wherein a center of the shift area is defined as a zeroth coordinate, wherein each of the third and fourth sub-routes has a rectangular shape rotated about the zeroth coordinate by a preset angle, wherein a third length of a minor axis of the third sub-route and a fourth length of a minor axis of the fourth sub-route are equal to each other, and wherein a third length of a major axis of the third sub-route and a fourth length of a major axis of the fourth sub-route are equal to each other. ### Claim 13 (depends on 1) The display device of claim 1, wherein the reference point shifting path further includes a third route, wherein the third route includes a fifth sub-route, and wherein the first, second, third, fourth, and fifth sub-routes are different from each other. ### Claim 14 (depends on 13) The display device of claim 13, wherein the reference point is shifted based on the fifth sub-route in an order of a first direction, a second direction, a third direction, a fourth direction, and the first direction. ### Claim 15 (depends on 13) The display device of claim 13, wherein the fifth sub-route starts after the fourth sub-route ends, and wherein a start coordinate of the fifth sub-route and an end coordinate of the fifth sub-route are different from each other. ### Claim 16 (depends on 13) The display device of claim 13, wherein a center of the shift area is defined as a zeroth coordinate, wherein the fifth sub-route has a rectangular shape rotated about the zeroth coordinate by a preset angle, and wherein a fifth length of a minor axis of the fifth sub-route and a fifth length of a major axis of the fifth sub-route are equal to each other. ### Claim 17 (depends on 13) The display device of claim 13, wherein the reference point shifting path further includes a fourth route, wherein the fourth route includes a sixth sub-route and a seventh sub-route, and wherein the first, second, third, fourth, fifth, sixth, and seventh sub-routes are different from each other. ### Claim 18 (depends on 17) The display device of claim 17, wherein the reference point is shifted based on the sixth sub-route in an order of a fifth direction, a second direction, a third direction, a fourth direction, a first direction, and the second direction, and wherein the reference point is shifted based on the seventh sub-route in an order of the first direction, the second direction, the third direction, the fourth direction, the first direction, and the second direction. ### Claim 19 (depends on 17) The display device of claim 17, wherein the seventh sub-route starts after the sixth sub-route ends, wherein a start coordinate of the sixth sub-route and an end coordinate of the seventh sub-route are different from each other, and wherein a start coordinate of the seventh sub-route and the end coordinate of the seventh sub-route are different from each other. ### Claim 20 (depends on 17) The display device of claim 17, wherein a center of the shift area is defined as a zeroth coordinate, wherein each of the sixth and seventh sub-routes has a rectangular shape rotated about the zeroth coordinate by a preset angle, wherein a sixth length of a minor axis of the sixth sub-route and a seventh length of a minor axis of the seventh sub-route are equal to each other, and wherein a sixth length of a major axis of the sixth sub-route and a seventh length of a major axis of the seventh sub-route are equal to each other. ### Claim 21 (depends on 17) The display device of claim 17, wherein the reference point shifting path further includes a fifth route, wherein the fifth route includes an eighth sub-route and a ninth sub-route, and wherein the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth sub-routes are different from each other. ### Claim 22 (depends on 21) The display device of claim 21, wherein the reference point is shifted based on the eighth sub-route in an order of a second direction, a third direction, a fourth direction, a first direction, and the second direction, and wherein the reference point is shifted based on the ninth sub-route in an order of the first direction, the second direction, the third direction, the fourth direction, the first direction, and the second direction. ### Claim 23 (depends on 21) The display device of claim 21, wherein the ninth sub-route starts after the eighth sub-route ends, wherein a start coordinate of the eighth sub-route and an end coordinate of the ninth sub-route are different from each other, and wherein a start coordinate of the ninth sub-route and the end coordinate of the ninth sub-route are different from each other. ### Claim 24 (depends on 21) The display device of claim 21, wherein a center of the shift area is defined as a zeroth coordinate, wherein each of the eighth and ninth sub-routes has a rectangular shape rotated about the zeroth coordinate by a preset angle, wherein an eighth length of a minor axis of the eighth sub-route and a ninth length of a minor axis of the ninth sub-route are equal to each other, and wherein an eighth length of a major axis of the eighth sub-route and a ninth length of a major axis of the ninth sub-route are equal to each other. ### Claim 25 (depends on 21) The display device of claim 21, wherein the reference point shifting path further includes a sixth route, wherein the sixth route includes a 10th sub-route and an 11th sub-route, and wherein the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, 10th, and 11th sub-routes are different from each other. ### Claim 26 (depends on 25) The display device of claim 25, wherein the reference point is shifted based on the 10th sub-route in an order of a second direction, a third direction, a fourth direction, a first direction, and the second direction, and wherein the reference point is shifted based on the 11th sub-route in an order of the first direction, the second direction, the third direction, the fourth direction, the first direction, and a sixth direction. ### Claim 27 (depends on 25) The display device of claim 25, wherein the 11th sub-route starts after the 10th sub-route ends, wherein a start coordinate of the 10th sub-route and an end coordinate of the 11th sub-route are different from each other, and wherein a start coordinate of the 11th sub-route and the end coordinate of the 11th sub-route are different from each other. ### Claim 28 (depends on 25) The display device of claim 25, wherein a center of the shift area is defined as a zeroth coordinate, wherein each of the 10th and 11th sub-routes has a rectangular shape rotated about the zeroth coordinate by a preset angle, wherein a 10th length of a minor axis of the 10th sub-route and an 11th length of a minor axis of the 11th sub-route are equal to each other, and wherein a 10th length of a major axis of the 10th sub-route and an 11th length of a major axis of the 11th sub-route are equal to each other. ### Claim 29 (depends on 28) The display device of claim 28, wherein a start coordinate of the first sub-route and an end coordinate of the 11th sub-route are identical to each other, and wherein each of the start coordinate of the first sub-route and the end coordinate of the 11th sub-route corresponds to the zeroth coordinate. ### Claim 30 (depends on 1) The display device of claim 1, wherein the shift area has a grid shape having rows corresponding to imaginary horizontal lines and columns corresponding to imaginary vertical lines, wherein intersection points in which the imaginary horizontal lines intersect the imaginary vertical lines are defined in the shift area, and wherein, based on an imaginary horizontal line located in middle among the imaginary horizontal lines or an imaginary vertical line located in middle among the imaginary vertical lines, the first sub-route and the second sub-route are symmetrical to each other, and the third sub-route and the fourth sub-route are symmetrical to each other. ### Claim 31 (depends on 30) The display device of claim 30, wherein the display panel includes a plurality of pixels disposed in the display area, and wherein some of the pixels are arranged to correspond to the intersection points. ### Claim 32 A display device comprising: a display panel including a display area in which a display image is displayed and a shift area located within the display area; and a display panel driver configured to drive the display panel and to perform a display image shifting operation by shifting a reference point of the display image along a reference point shifting path in the shift area, wherein the reference point shifting path includes a preset route including first to nth sub-routes, wherein n is an integer greater than or equal to 2, wherein the first to nth sub-routes are different from each other, and wherein a path of the reference point corresponding to the first sub-route and a path of the reference point corresponding to the second sub-route cross each other.