# US 12,190,827 B2 · Display device and method of driving the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,190,827 B2 - Document ID: US12190827B2 - Status: Granted - Kind: B2 - Application number: 18/364,072 - Filed: 2023-08-02 - Published: 2023-11-30 - Granted: 2025-01-07 - Earliest claimed: 2021-05-20 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Ki Hyun Pyun; Jung Eon An - Web page: https://patentgrep.com/patent/US12190827B2 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/3275: Details of drivers for data electrodes - G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements - G09G 2300/043: Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver - 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 2310/0286: Details of a shift registers arranged for use in a driving circuit - G09G 2310/061: for resetting or blanking - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2320/0295: by monitoring each display pixel - G09G 2320/043: Preventing or counteracting the effects of ageing - G09G 2320/045: Compensation of drifts in the characteristics of light emitting or modulating elements - G09G 2330/028: Generation of voltages supplied to electrode drivers in a matrix display other than LCD - G09G 2360/147: the originated light output being determined for each 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 A display device includes a sensor, a timing controller, and a data driver. The sensor senses characteristic values of an element included in a pixel of the display device using input initialization and data voltages in a sensing period of one frame period. The timing controller calculates compensation data voltage using the characteristic values, and calculate adjusted initialization and data voltages in the sensing period by using the compensation data voltage. The data driver output the adjusted initialization and data voltages to the pixel during the sensing period in response to a control signal output from the timing controller. ## Claims ### Claim 1 A display device comprising: a pixel; a sensor to sense characteristic values of a circuit element of the pixel in a sensing period of a frame period; and a controller to adjust an initialization voltage supplied to the pixel based on the characteristic values and a margin value of the initialization voltage, wherein after a first time is elapsed, the initialization voltage supplied to the pixel in the sensing period is set to a first voltage value, after a second time different from the first time is elapsed, the initialization voltage supplied to the pixel is set to a second voltage value greater than the first voltage value. ### Claim 2 (depends on 1) The display device of claim 1, wherein: the controller is configured to further adjust a data voltage based on the characteristic values of the circuit element of the pixel; and after the first time is elapsed, the data voltage supplied to the pixel during the sensing period is set to a third voltage value, after the second time is elapsed, the data voltage supplied to the pixel is set to a fourth voltage value different from the third voltage value, the third voltage value being higher than the fourth voltage value. ### Claim 3 (depends on 1) The display device of claim 1, wherein the frame period comprises an active period and a blank period, and the blank period comprises the sensing period. ### Claim 4 (depends on 2) The display device of claim 2, wherein: the initialization voltage having the first voltage value is supplied to the pixel in the sensing period of the frame period; and the initialization voltage having the second voltage value is supplied to the pixel in the active period of another frame period following the frame period. ### Claim 5 (depends on 1) The display device of claim 1, wherein the pixel comprises: a light emitting diode connected to a first node; a first transistor connected between a first power source and the first node, and having a gate electrode connected to a second node; and a second transistor connected between a data line and the second node, and wherein the initialization voltage is supplied to the first node, and the data voltage is supplied to the second node through the data line and the second transistor. ### Claim 6 (depends on 5) The display device of claim 5, wherein the characteristic values include a threshold voltage of a first transistor, a mobility of the first transistor, and a characteristic value of the light emitting diode. ### Claim 7 (depends on 6) The display device of claim 6, wherein the controller is configured to support a plurality of sensing modes including a first sensing mode to sense the threshold voltage of the first transistor, a second sensing mode to sense the mobility of the first transistor, and a third sensing mode to sense the characteristic value of the light emitting diode. ### Claim 8 (depends on 1) The display device of claim 1, wherein the controller is configured to calculate a compensation data voltage using the characteristic values, and adjust the initialization voltage based on the compensation data voltage. ### Claim 9 (depends on 8) The display device of claim 8, wherein the initialization voltage is adjusted based on the compensation data voltage and the margin value associated with a mode of the controller. ### Claim 10 (depends on 8) The display device of claim 8, wherein the initialization voltage decreases as the compensation data voltage increases. ### Claim 11 (depends on 1) The display device of claim 1, further comprising a data driver to output the initialization voltage and the data voltage in response to control signals of the controller. ### Claim 12 A display device comprising: a pixel; a sensor to sense characteristic values of a circuit element of the pixel by using an initialization voltage and a data voltage supplied to the pixel in a sensing period of a frame period; and a controller to adjust the initialization voltage based on the characteristic values, wherein after a first time is elapsed, the initialization voltage supplied to the pixel in the sensing period is set to a first voltage value, after a second time different from the first time is elapsed, the initialization voltage supplied to the pixel is set to a second voltage value different from the first voltage value, the first voltage value being lower than the second voltage value, wherein the controller is configured to calculate a compensation data voltage using the characteristic values, and adjust the initialization voltage based on the compensation data voltage, and wherein the initialization voltage is adjusted based on the compensation data voltage and a margin value associated with a mode of the controller.