# US 12,762,987 B2 ยท Display device and method of driving the same, and electronic device including the display device > Agents: this data is available as JSON from the patentgrep API and MCP server โ€” see https://patentgrep.com/llms.txt - Number: US 12,762,987 B2 - Document ID: US12762987B2 - Status: Granted - Kind: B2 - Application number: 18/790,466 - Filed: 2024-07-31 - Published: 2025-06-12 - Granted: 2026-10-13 - Earliest claimed: 2023-12-06 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Jung Eon An; Ki Hyun Pyun - Web page: https://patentgrep.com/patent/US12762987B2 ## CPC - G09G 3/2092: {Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165)} - G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)} - G09G 3/2007: {Display of intermediate tones} - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - 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 2330/021: Power management, e.g. power saving - G09G 2330/028: Generation of voltages supplied to electrode drivers in a matrix display other than LCD - 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 pixel component including pixels connected to a first power line, a second power line, scan lines, and data lines; a sensing resistor between the first power line and the pixel component; a voltage/current sensing component configured to measure a sensing voltage from the sensing resistor during a correction period; a timing controller configured to generate a voltage code based on pieces of input data; and a power generator configured to supply a voltage of first driving power to the first power line in response to the voltage code, wherein the timing controller is configured to generate, during the correction period, a compensation look-up table (LUT) such that a target voltage corresponding to the voltage code matches with the sensing voltage. ## Claims ### Claim 1 A display device, comprising: a pixel component including pixels connected to a first power line, a second power line, scan lines, and data lines; a sensing resistor between the first power line and the pixel component; a voltage/current sensing component configured to measure a sensing voltage from the sensing resistor during a correction period in response to a sensing control signal, wherein the correction period is positioned at a time point at which power is supplied to the display device after a usage time of the display device exceeds a preset threshold value; a timing controller configured to generate a voltage code based on pieces of input data; and a power generator configured to supply a voltage of first driving power to the first power line in response to the voltage code, wherein the timing controller is configured to generate, during the correction period, a compensation look-up table (LUT) such that a target voltage corresponding to the voltage code matches with the sensing voltage. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the timing controller is configured to generate the compensation LUT in response to a first voltage code of a minimum load, a second voltage code of an intermediate load, and a third voltage code of a maximum load. ### Claim 3 (depends on 2) The display device according to claim 2, wherein the timing controller is configured to generate the compensation LUT corresponding to remaining loads and remaining voltage codes by interpolating the first voltage code, the second voltage code, and the third voltage code. ### Claim 4 (depends on 2) The display device according to claim 2, wherein the first voltage code corresponds to a minimum grayscale value, the second voltage code corresponds to an intermediate grayscale value, and the third voltage code corresponds to a maximum grayscale value. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the voltage/current sensing component is configured to measure sensing current from the sensing resistor during a period other than the correction period. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the power generator comprises: an analog-digital converter configured to generate a reference voltage using the voltage code; and a DC-DC converter configured to generate the first driving power based on the reference voltage. ### Claim 7 (depends on 1) The display device according to claim 1, wherein the timing controller comprises: an analyzer configured to calculate a load from the pieces of input data, and extract a peak grayscale value; a code value generator configured to generate the voltage code corresponding to the load and the peak grayscale value; and a voltage adjuster configured to generate the compensation LUT using an offset corresponding to a difference between the sensing voltage and the target voltage. ### Claim 8 (depends on 7) The display device according to claim 7, wherein the timing controller further comprises a sensing controller configured to control the voltage/current sensing component to measure the sensing voltage during the correction period, and control the voltage/current sensing component to measure sensing current during a period other than the correction period. ### Claim 9 (depends on 7) The display device according to claim 7, wherein the analyzer comprises: a load analyzer configured to calculate a load from the pieces of input data; and a grayscale analyzer configured to extract the peak grayscale value from the pieces of input data. ### Claim 10 (depends on 7) The display device according to claim 7, wherein the voltage adjuster comprises: a voltage error determination component configured to extract a target voltage corresponding to the voltage code from a target LUT, and generate an offset corresponding to a difference between the sensing voltage and the target voltage; and a compensation LUT generator configured to generate the compensation LUT by applying the offset to a reference LUT in which the target voltage corresponding to the voltage code is stored. ### Claim 11 (depends on 10) The display device according to claim 10, wherein the target LUT is an LUT identical to the reference LUT. ### Claim 12 (depends on 10) The display device according to claim 10, wherein the voltage error determination component is configured to generate an offset of a negative value in a case where the sensing voltage is higher than the target voltage, and to generate an offset of a positive value in a case where the sensing voltage is lower than the target voltage. ### Claim 13 (depends on 10) The display device according to claim 10, wherein the voltage error determination component is configured to generate a value of โ€œ0โ€ as the offset in a case where the sensing voltage is identical to the target voltage. ### Claim 14 (depends on 10) The display device according to claim 10, wherein the code value generator is configured to generate the voltage code using the compensation LUT during a period other than the correction period. ### Claim 15 A method of driving a display device, the method comprising: generating a voltage of first driving power corresponding to a voltage code during a correction period in response to a sensing control signal, wherein the correction period is positioned at a time point at which power is supplied to the display device after a usage time of the display device exceeds a preset threshold value; measuring the voltage of the first driving power and generating a sensing voltage; comparing the sensing voltage with a target voltage corresponding to the voltage code, and generating an offset; and generating a compensation look-up table (LUT) using the offset. ### Claim 16 (depends on 15) The method according to claim 15, wherein the offset is generated such that the sensing voltage is identical to the target voltage. ### Claim 17 (depends on 15) The method according to claim 15, wherein the voltage code is generated using the compensation LUT during a period other than the correction period. ### Claim 18 (depends on 15) The method according to claim 15, wherein generating the compensation LUT comprises generating the compensation LUT in response to a first voltage code of a minimum load, a second voltage code of an intermediate load, and a third voltage code of a maximum load during the correction period. ### Claim 19 (depends on 18) The method according to claim 18, further comprising generating the compensation LUT corresponding to remaining loads and remaining codes by interpolating the first voltage code, the second voltage code, and the third voltage code. ### Claim 20 (depends on 18) The method according to claim 18, wherein the first voltage code corresponds to a minimum grayscale value, the second voltage code corresponds to an intermediate grayscale value, and the third voltage code corresponds to a maximum grayscale value. ### Claim 21 (depends on 15) The method according to claim 15, wherein generating the offset comprises generating an offset of a negative value in a case where the sensing voltage is higher than the target voltage, and generating an offset of a positive value in a case where the sensing voltage is lower than the target voltage. ### Claim 22 An electronic device comprising: a display panel including pixels; a voltage generation circuit configured to supply a voltage of first driving power to the display panel based on a voltage code; a current/voltage sensing component configured to measure, during a correction period in response to a sensing control signal, the voltage of the first driving power supplied to the display panel and to generate a sensing voltage, wherein the correction period is positioned at a time point at which power is supplied to the dislay panel after a usage time of the display panel exceeds a preset threshold value; and a controller configured to generate the voltage code based on pieces of input data, wherein the controller is configured to generate, during the correction period, a compensation LUT such that a target voltage corresponding to the voltage code matches with the sensing voltage. ### Claim 23 (depends on 22) The electronic device according to claim 22, wherein the controller is configured to generate the compensation LUT in response to a first voltage code of a minimum load, a second voltage code of an intermediate load, and a third voltage code of a maximum load, and wherein the controller is configured to generate the compensation LUT corresponding to remaining loads and remaining voltage codes by interpolating the first voltage code, the second voltage code, and the third voltage code. ### Claim 24 (depends on 22) The electronic device according to claim 22, wherein the controller is configured to generate the voltage code using the compensation LUT during a period other than the correction period.