# US 2018/0322831 A1 · Display device and method of driving the display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0322831 A1 - Document ID: US20180322831A1 - Status: Published application - Kind: A1 - Application number: 15/879,262 - Filed: 2018-01-24 - Published: 2018-11-08 - Earliest claimed: 2017-05-02 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Ji Hye KIM; Dong Hwi KIM; Jin JEON - Web page: https://patentgrep.com/patent/US20180322831A1 ## CPC - G09G 3/3266: Details of drivers for scan electrodes - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element - G09G 5/14: Display of multiple viewports - G02B 27/017: {Head mounted} - G09G 2300/0814: used for selection purposes, e.g. logical AND for partial update - G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes - G09G 2300/0866: by means of changes in the pixel supply voltage - G09G 2310/021: Double addressing, i.e. scanning two or more lines, e.g. lines 2 and 3; 4 and 5, at a time in a first field, followed by scanning two or more lines in another combination, e.g. lines 1 and 2; 3 and 4, in a second field - G09G 2310/0213: controlling the sequence of the scanning lines with respect to the patterns to be displayed, e.g. to save power - G09G 2310/0281: Arrangement of scan or data electrode driver circuits at the periphery of a panel not inherent to a split matrix structure - G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0252: Improving the response speed - G09G 2320/08: Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal - G09G 2340/0442: Handling or displaying different aspect ratios, or changing the aspect ratio - 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) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A display device includes: first and second pixel regions, wherein the display device displays an effective image in the first and second pixel regions, corresponding to a first mode, and displays an effective image in the second pixel region, corresponding to a second mode; first pixels and first scan lines in the first pixel region; second pixels and second scan lines in the second pixel region; a first scan driver comprising first scan stages configured to drive at least some of the first scan lines; a second scan driver comprising second scan stages configured to drive the second scan lines; and a timing controller configured to supply first and second start signals to the first and second scan drivers, wherein, when the display device is driven in the second mode, a width of the second start signal is set wider than a width of the first start signal. ## Claims ### Claim 1 A display device comprising: a display region including first and second pixel regions, wherein the display device is configured to display an effective image in the first and second pixel regions, corresponding to a first mode, and display an effective image in the second pixel region, corresponding to a second mode; a plurality of first pixels and a plurality of first scan lines in the first pixel region; a plurality of second pixels and a plurality of second scan lines in the second pixel region; a first scan driver comprising a plurality of first scan stages configured to drive at least some of the first scan lines; and a second scan driver comprising a plurality of second scan stages configured to drive the second scan lines, wherein the first scan driver is configured to supply p (p is a natural number) first scan signals to each of the at least some of the first scan lines during one frame period, corresponding to the second mode, wherein the second scan driver is configured to supply q (q is a natural number greater than p) second scan signals to each of the second scan lines during the one frame period, corresponding to the second mode. ### Claim 2 (depends on 1) The display device of claim 1, wherein the first scan driver is configured to drive the at least some of the first scan lines during at least a partial period in the period in which the second scan lines are driven, corresponding to the second mode. ### Claim 3 (depends on 1) The display device of claim 1, wherein the first and second scan drivers are configured to sequentially supply r (r is a natural number smaller than q) scan signals to each of the first and second scan lines, corresponding to the first mode. ### Claim 4 (depends on 1) The display device of claim 1, further comprising a timing controller configured to supply first and second start signals respectively to the first and second scan drivers, corresponding to first and second modes. ### Claim 5 (depends on 4) The display device of claim 4, wherein the timing controller is configured to sequentially supply the first and second start signals respectively to the first and second scan drivers, corresponding to the first mode, and wherein, when the display device is driven in the first mode, the first and second start signals have the same width. ### Claim 6 (depends on 4) The display device of claim 4, wherein the timing controller is configured to supply the first and second start signals having different widths respectively to the first and second scan drivers, corresponding to the second mode, and wherein, when the display device is driven in the second mode, the second start signal has a width wider by two horizontal periods (2H) or more than that of the first start signal. ### Claim 7 (depends on 4) The display device of claim 4, further comprising: a third pixel region in the display region; a plurality of third pixels and a plurality of third scan lines in the third pixel region; and a third scan driver including a plurality of third scan stages configured to drive the third scan lines, wherein the timing controller is configured to supply a third start signal having a width narrower by two horizontal periods (2H) or more than that of the second start signal, corresponding to the second mode. ### Claim 8 (depends on 7) The display device of claim 7, wherein the timing controller is configured to sequentially supply the first, second, and third start signals respectively to the first, second, and third scan drivers, corresponding to the first mode, and wherein, when the display device is driven in the first mode, the first, second, and third start signals have the same width. ### Claim 9 (depends on 7) The display device of claim 7, wherein, when the display device is driven in the second mode, the first and third start signals are supplied during period different from one another in the period in which the second scan lines are driven, and have the same width. ### Claim 10 (depends on 1) The display device of claim 1, further comprising: a third pixel region in the display region; a plurality of third pixels and a plurality of third scan lines in the third pixel region; and a third scan driver including a plurality of third scan stages configured to drive the third scan lines, wherein the first and third scan drivers are configured to respectively drive the first and third scan lines during different partial periods in the period in which the second scan lines are driven, corresponding to the second mode. ### Claim 11 (depends on 10) The display device of claim 10, wherein the second pixel region is between the first pixel region and the third pixel region. ### Claim 12 (depends on 11) The display device of claim 11, wherein, when the display device is driven in the second mode, the second scan driver is configured to sequentially drive the second scan lines during the one frame period, the first scan driver is configured to sequentially drive the first scan lines during the period in which some second scan lines adjacent to the third pixel region among the second scan lines are driven, and the third scan driver is configured to sequentially drive the third scan lines during the period in which other second scan lines adjacent to the first pixel region among the second scan lines are driven. ### Claim 13 (depends on 11) The display device of claim 11, wherein the first, second, and third scan drivers are configured to sequentially drive the respective first, second, and third scan lines, corresponding to the first mode. ### Claim 14 (depends on 1) The display device of claim 1, wherein second pixels on a first horizontal line of the second pixel region are coupled to any one scan line among the first scan lines. ### Claim 15 (depends on 14) The display device of claim 14, wherein the second scan driver further comprises a first scan stage configured to drive the one first scan line, and the second scan driver is configured to sequentially supply q first scan signals and the q second scan signals respectively to the one first scan line and the second scan lines by sequentially shifting a second start signal supplied to the first scan stage. ### Claim 16 (depends on 1) The display device of claim 1, wherein, when the display device is driven in the second mode, each of the first pixels emits light during a first time in the one frame period, and each of the second pixels emits light during a second time longer than the first time in the one frame period. ### Claim 17 (depends on 1) The display device of claim 1, further comprising: a plurality of first emission control lines in the first pixel region; a plurality of second emission control lines in the second pixel region; a first emission control driver comprising a plurality of first emission control stages configured to drive the first emission control lines; a second emission control driver comprising a plurality of second emission control stages configured to drive the second emission control lines; and a timing controller configured to supply first and second emission start signals respectively to the first and second emission control drivers, corresponding to the first and second modes, wherein, when the display device is driven in the first mode, the first and second emission start signals have the same width, and wherein, when the display device is driven in the second mode, the first and second emission start signals have widths different from each other. ### Claim 18 A display device comprising: a display region comprising first and second pixel regions, wherein the display device is configured to display an effective image in the first and second pixel regions, corresponding to a first mode, and display an effective image in the second pixel region, corresponding to a second mode; a plurality of first pixels and a plurality of first scan lines in the first pixel region; a plurality of second pixels and a plurality of second scan lines in the second pixel region; a first scan driver comprising a plurality of first scan stages configured to drive at least some of the first scan lines; a second scan driver comprising a plurality of second scan stages configured to drive the second scan lines; and a timing controller configured to supply first and second start signals respectively to the first and second scan drivers, wherein, when the display device is driven in the second mode, a width of the second start signal is set wider than a width of the first start signal. ### Claim 19 A method for driving a display device, the display device comprising a first pixel region having a plurality of first pixels and a second pixel region having a plurality of second pixels, the method comprising: when the display device is driven in a first mode, displaying an effective image in the first and second pixel regions; and when the display device is driven in a second mode, displaying an effective image in the second pixel region, wherein, when the display device is driven in the first mode, a same number of scan signals are supplied to each of the first and second pixels during each frame period, wherein, when the display device is driven in the second mode, q (q is a natural number of 2 or more) second scan signals are supplied to each of the second pixels during one frame period, and p (p is a natural number smaller than q) first scan signals are supplied to each of at least some of the first pixels during the period in which the second scan signal is supplied to at least some of the second pixels. ### Claim 20 (depends on 19) The method of claim 19, wherein, when the display device is driven in the first mode, each of the first and second pixels is controlled to have the same emission time, and wherein, when the display device is driven in the second mode, each of the first pixels is controlled to have an emission time shorter than that of each of the second pixels.