# US 12,118,913 B2 · Electronic device and driving method of electronic device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,118,913 B2 - Document ID: US12118913B2 - Status: Granted - Kind: B2 - Application number: 17/986,134 - Filed: 2022-11-14 - Published: 2023-07-27 - Granted: 2024-10-15 - Earliest claimed: 2022-02-17 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Dowon Kim; Yoon Kang; Min-Weun Kim; Sung-Yeol Baek - Web page: https://patentgrep.com/patent/US12118913B2 ## CPC - G09G 3/2007: {Display of intermediate tones} - G09G 3/3225: using an active matrix - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2320/0276: for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction - G09G 2320/0285: using tables for spatial correction of display data - G09G 2320/041: Temperature compensation - G09G 2320/0673: for control of gamma adjustment, e.g. selecting another gamma curve - G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data - 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 An electronic device includes a display layer, a data driving circuit, a scan driving circuit, a driving controller, and a temperature sensor which measures a temperature of the display layer to generate temperature data. The driving controller includes a first lookup table calculating unit which calculates a first lookup table based on the image signal, the temperature data, and a reference lookup table set for each of a plurality of gray levels, a luminance compensating unit which calculates a luminance weight based on luminance data, and a second lookup table calculating unit which calculates a second lookup table based on the first lookup table and the luminance weight, and the driving controller generates the image data based on the image signal and the second lookup table. ## Claims ### Claim 1 An electronic device comprising: a display layer which displays an image, wherein the display layer includes a plurality of pixels connected with a plurality of data lines and a plurality of scan lines; a data driving circuit which drives the plurality of data lines; a scan driving circuit which drives the plurality of scan lines; a driving controller which generates image data based on a received image signal and controls the data driving circuit and the scan driving circuit; and a temperature sensor which measures a temperature of the display layer to generate temperature data, wherein the driving controller includes: a first lookup table calculating unit which calculates a first lookup table based on the image signal, the temperature data, and a reference lookup table set for each of a plurality of gray levels; a luminance compensating unit which calculates a luminance weight based on luminance data; and a second lookup table calculating unit which calculates a second lookup table based on the first lookup table and the luminance weight, and wherein the driving controller generates the image data based on the image signal and the second lookup table. ### Claim 2 (depends on 1) The electronic device of claim 1, wherein the plurality of gray levels are classified into a low gray level zone defined by half of all the plurality of gray levels and a high gray level zone defined by the other half of all the plurality of gray levels, and wherein the first lookup table calculating unit calculates the first lookup table for each group of gray levels in the low gray level zone, and calculates the first lookup table for each gray level of the high gray level zone, based on a maximum gray level value of the high gray level zone. ### Claim 3 (depends on 2) The electronic device of claim 2, wherein the plurality of gray levels includes 512 gray levels, the low gray level zone includes a 0-th gray level to a 256th gray level, and the high gray level zone includes a 257th gray level to a 511st gray level, and wherein each group of gray levels in the low gray level zone includes 8 gray levels. ### Claim 4 (depends on 1) The electronic device of claim 1, wherein the first lookup table calculating unit calculates the first lookup table with respect to all the plurality of gray levels. ### Claim 5 (depends on 1) The electronic device of claim 1, wherein the luminance weight has a different value for each gray level. ### Claim 6 (depends on 1) The electronic device of claim 1, wherein the display layer includes a light emitting device including an organic light emitting material. ### Claim 7 (depends on 1) The electronic device of claim 1, wherein the first lookup table includes a sign bit. ### Claim 8 (depends on 1) The electronic device of claim 1, wherein the display layer displays the image based on the image data. ### Claim 9 (depends on 1) The electronic device of claim 1, further comprising: a memory in which the reference lookup table is stored, wherein the driving controller receives the reference lookup table from the memory. ### Claim 10 An electronic device comprising: a display layer including a light emitting device including an organic light emitting material; a driving controller which generates image data based on a received image signal and controls the display layer; and a temperature sensor which measures a temperature of the light emitting device to generate temperature data, wherein the driving controller includes: a first lookup table calculating unit which calculates a first lookup table based on the image signal, the temperature data, and a reference lookup table set for each of gray levels; a luminance compensating unit which calculates a luminance weight based on luminance data; and a second lookup table calculating unit which calculates a second lookup table based on the first lookup table and the luminance weight, wherein a plurality of gray levels are classified into a low gray level zone defined by some of the plurality of gray levels and a high gray level zone defined by the others of the plurality of gray levels, wherein the first lookup table calculating unit calculates the first lookup table for each of the plurality of gray levels by calculating the first lookup table for each group of gray levels in the low gray level zone and calculates the first lookup table for each gray level of the high gray level zone based on a maximum gray level value of the high gray level zone, and wherein the driving controller generates the image data based on the image signal and the second lookup table. ### Claim 11 (depends on 10) The electronic device of claim 10, wherein the luminance weight has a different value for each gray level. ### Claim 12 (depends on 10) The electronic device of claim 10, wherein the first lookup table is different from the second lookup table. ### Claim 13 (depends on 10) The electronic device of claim 10, wherein the display layer displays an image based on the image data. ### Claim 14 (depends on 10) The electronic device of claim 10, further comprising: a memory in which the reference lookup table is stored, wherein the driving controller receives the reference lookup table from the memory. ### Claim 15 A driving method of an electronic device, the driving method comprising: generating temperature data; calculating a first lookup table for each of gray levels based on the temperature data and a reference lookup table set for each of a plurality of gray levels; calculating a luminance weight based on luminance data; calculating a second lookup table based on the first lookup table and the luminance weight, wherein the second lookup table is different from the first lookup table; and generating image data based on an image signal and the second lookup table. ### Claim 16 (depends on 15) The driving method of claim 15, further comprising: displaying, at a display layer including a light emitting device of the electronic device, an image based on the image data. ### Claim 17 (depends on 16) The driving method of claim 16, wherein the generating the temperature data includes: measuring a temperature of the light emitting device. ### Claim 18 (depends on 15) The driving method of claim 15, wherein the calculating the first lookup table includes: classifying the plurality of gray levels into a low gray level zone defined by some of the plurality of gray levels and a high gray level zone defined by the others of the plurality of gray levels; calculating the first lookup table for each group of gray levels in the low gray level zone; and calculating the first lookup table for each gray level of the high gray level zone, based on a maximum gray level value of the high gray level zone. ### Claim 19 (depends on 18) The driving method of claim 18, wherein each group of gray levels in the low gray level zone includes 8 gray levels, and wherein the plurality of gray levels include 512 gray levels, the low gray level zone includes a 0-th gray level to a 256th gray level, and the high gray level zone includes a 257th gray level to a 511st gray level. ### Claim 20 (depends on 15) The driving method of claim 15, wherein the calculating the luminance weight includes: calculating the luminance weight to have a different value for each gray level.