# US 10,504,470 B2 · Driving method of display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,504,470 B2 - Document ID: US10504470B2 - Status: Granted - Kind: B2 - Application number: 15/888,630 - Filed: 2018-02-05 - Published: 2018-08-09 - Granted: 2019-12-10 - Earliest claimed: 2018-02-05 - Assignees: Semiconductor Energy Laboratory Co., Ltd. - Applicants: Semiconductor Energy Laboratory Co., Ltd. - Inventors: Susumu Kawashima; Hidetomo Kobayashi - Web page: https://patentgrep.com/patent/US10504470B2 ## CPC - G09G 3/3677: {suitable for active matrices only} - G09G 2310/0213: controlling the sequence of the scanning lines with respect to the patterns to be displayed, e.g. to save power - G09G 2310/04: Partial updating of the display screen - G09G 2320/0219: Reducing feedthrough effects in active matrix panels, i.e. voltage changes on the scan electrode influencing the pixel voltage due to capacitive coupling - G09G 2320/0295: by monitoring each display pixel - 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 Display quality is improved. A display device includes a display controller and a display panel provided with m×n pixels. The display controller includes the step of comparing first display data, which is displayed in a first pixel connected to the i-th signal line and the (j−1)-th scan line, with second display data, which is displayed in a second pixel connected to the i-th signal line and the j-th scan line, and calculating an absolute value of a difference value, the step of extracting a maximum value from a result of the absolute value, and the step of determining a first selection period of the j-th scan line in accordance with the maximum value. ## Claims ### Claim 1 A driving method of a display device comprising a display controller and a display panel provided with first to m-th signal lines, first to n-th scan lines, and a plurality of pixels arranged at intersection points of the scan lines and the signal lines, the display controller comprising the steps of: calculating a first absolute value of a difference value between first display data and second display data and a second absolute value of a difference value between third display data and fourth display data, wherein the first display data is displayed in a first pixel connected to one of the signal lines and (j−1)-th scan line (j is greater than or equal to 2 and less than or equal to n), the second display data is displayed in a second pixel connected to the one of the signal lines and j-th scan line, the third display data is displayed in a third pixel connected to another of the signal lines and the (j−1)-th scan line, and the fourth display data is displayed in a fourth pixel connected to the another of the signal lines and the j-th scan line; extracting a maximum value from the first absolute value and the second absolute value; determining a first selection period of the j-th scan line in accordance with the maximum value, from results of a plurality of absolute values, determining that the first display data is the same as the second display data; concurrently selecting the (j−1)-th scan line and the j-th scan line after determining that the first display data is the same as the second display data; and concurrently updating the first pixel and the second pixel with the first display data, wherein the first pixel and the second pixel are connected to the one of the signal lines. ### Claim 2 (depends on 1) The driving method of the display device according to claim 1, the display controller further comprising the steps of: dividing the first selection period in accordance with the extracted maximum value; comparing the first selection period with a second selection period calculated by dividing one frame period by the number of scan lines; and determining that the first selection period is shorter than the second selection period. ### Claim 3 (depends on 1) The driving method of the display device according to claim 1, the display controller further comprising the steps of: dividing the first selection period in accordance with the extracted maximum value; comparing the first selection period with a second selection period calculated by dividing one frame period by the number of scan lines; and determining that the first selection period is longer than the second selection period. ### Claim 4 (depends on 1) The driving method of the display device according to claim 1, wherein the display panel comprises a transistor, and wherein the transistor comprises amorphous silicon in a semiconductor layer. ### Claim 5 (depends on 1) The driving method of the display device according to claim 1, wherein the display panel comprises a transistor, and wherein the transistor comprises polycrystalline silicon in a semiconductor layer. ### Claim 6 (depends on 1) The driving method of the display device according to claim 1, wherein the display panel comprises a transistor, and wherein the transistor comprises a metal oxide in a semiconductor layer. ### Claim 7 (depends on 6) The driving method of the display device according to claim 6, wherein the display panel comprises a transistor, and wherein the transistor comprises a backgate. ### Claim 8 A driving method of a display device comprising a display controller and a display panel provided with first to m-th signal lines, first to n-th scan lines, and a plurality of pixels arranged at intersection points of the scan lines and the signal lines, the display controller comprising the steps of: calculating an absolute value of a difference value between display data of a (j−1)-th pixel and display data of a j-th pixel in each of the signal lines (j is greater than or equal to 2 and less than or equal to n); extracting a maximum value from the absolute values; determining a first selection period of a j-th scan line in accordance with the maximum from results of absolute values, determining that the display data of the (j−1)-th pixel is the same as the display data of the j-th pixel; concurrently selecting a (j−1)-th scan line and the j-th scan line after determining that the display data of the (j−1)-th pixel is the same as the display data of the j-th pixel; and concurrently updating the (j−1)-th pixel and the j-th pixel with the display data of the (j−1)-th pixel, wherein the (j−1)-th pixel and the j-th pixel are connected to one of the signal lines. ### Claim 9 (depends on 8) The driving method of the display device according to claim 8, the display controller further comprising the steps of: dividing the first selection period in accordance with the extracted maximum value; comparing the first selection period with a second selection period calculated by dividing one frame period by the number of scan lines; and determining that the first selection period is shorter than the second selection period. ### Claim 10 (depends on 8) The driving method of the display device according to claim 8, the display controller further comprising the steps of: dividing the first selection period in accordance with the extracted maximum value; comparing the first selection period with a second selection period calculated by dividing one frame period by the number of scan lines; and determining that the first selection period is longer than the second selection period. ### Claim 11 (depends on 8) The driving method of the display device according to claim 8, wherein the display panel comprises a transistor, and wherein the transistor comprises amorphous silicon in a semiconductor layer. ### Claim 12 (depends on 8) The driving method of the display device according to claim 8, wherein the display panel comprises a transistor, and wherein the transistor comprises polycrystalline silicon in a semiconductor layer. ### Claim 13 (depends on 8) The driving method of the display device according to claim 8, wherein the display panel comprises a transistor, and wherein the transistor comprises a metal oxide in a semiconductor layer. ### Claim 14 (depends on 13) The driving method of the display device according to claim 13, wherein the display panel comprises a transistor, and wherein the transistor comprises a backgate.