# US 2026/0100159 A1 · Display device supporting a variable frame mode and electronic device including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0100159 A1 - Document ID: US20260100159A1 - Status: Published application - Kind: A1 - Application number: 19/236,311 - Filed: 2025-06-12 - Published: 2026-04-09 - Earliest claimed: 2024-10-08 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: JUNG-TAEK KIM; HONG-KYU KIM - Web page: https://patentgrep.com/patent/US20260100159A1 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/3266: Details of drivers for scan electrodes - G09G 3/3275: Details of drivers for data electrodes - 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 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/02: Improving the quality of display appearance - G09G 2340/0435: Change or adaptation of the frame rate of the video stream - 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 display panel including a plurality of pixels, and a panel driver which drives the display panel based on input image data. In a variable frame mode in which the panel driver receives the input image data at a variable frame frequency, the panel driver selectively performs a data compensation operation or an initialization compensation operation based on a luminance of the display panel and a frequency change amount of the variable frame frequency. ## Claims ### Claim 1 A display device comprising: a display panel including a plurality of pixels; and a panel driver which drives the display panel based on input image data, wherein, in a variable frame mode in which the panel driver receives the input image data at a variable frame frequency, the panel driver selectively performs a data compensation operation or an initialization compensation operation based on a luminance of the display panel and a frequency change amount of the variable frame frequency. ### Claim 2 (depends on 1) The display device of claim 1, wherein, the panel driver performs the data compensation operation by adjusting voltage levels of data voltages provided to the plurality of pixels in an active period of a frame period corresponding to the variable frame frequency. ### Claim 3 (depends on 2) The display device of claim 2, wherein, as the variable frame frequency decreases, the panel driver decreases the voltage levels of the data voltages. ### Claim 4 (depends on 1) The display device of claim 1, wherein, the panel driver performs the initialization compensation operation by performing a dummy scan operation for initializing light emitting elements of the plurality of pixels in a blank period of a frame period. ### Claim 5 (depends on 1) The display device of claim 1, wherein the panel driver performs the data compensation operation when the luminance of the display panel is greater than or equal to a reference luminance or the frequency change amount of the variable frame frequency is less than or equal to a reference frequency change amount, and wherein the panel driver performs the initialization compensation operation when the luminance of the display panel is less than the reference luminance and the frequency change amount of the variable frame frequency is greater than the reference frequency change amount. ### Claim 6 (depends on 1) The display device of claim 1, wherein the panel driver outputs first blank data voltages in a blank period of a first frame period in which the data compensation operation is performed, and outputs second blank data voltages, which are different from the first blank data voltages, in a blank period of a second frame period in which the initialization compensation operation is performed. ### Claim 7 (depends on 6) The display device of claim 6, wherein the second blank data voltages are higher than the first blank data voltages. ### Claim 8 (depends on 1) The display device of claim 1, wherein the panel driver includes: a scan driver which provides first scan signals and second scan signals to the plurality of pixels in an active period of a frame period; a data driver which provides data voltages to the plurality of pixels in the active period; and a controller which controls the scan driver and the data driver, and wherein the controller includes: a display luminance determining block which determines the luminance of the display panel based on the input image data; a frequency change amount determining block which determines the frequency change amount of the variable frame frequency based on a vertical synchronization signal; and a compensation operation selecting block which select the data compensation operation or the initialization compensation operation based on the luminance of the display panel and the frequency change amount of the variable frame frequency. ### Claim 9 (depends on 8) The display device of claim 8, wherein the compensation operation selecting block selects the data compensation operation when the luminance of the display panel is greater than or equal to a reference luminance or the frequency change amount of the variable frame frequency is less than or equal to a reference frequency change amount, and wherein the compensation operation selecting block selects the initialization compensation operation when the luminance of the display panel is less than the reference luminance and the frequency change amount of the variable frame frequency is greater than the reference frequency change amount. ### Claim 10 (depends on 8) The display device of claim 8, wherein, when the compensation operation selecting block selects the data compensation operation, the data driver decreases voltage levels of the data voltages as the variable frame frequency decreases. ### Claim 11 (depends on 8) The display device of claim 8, wherein, when the compensation operation selecting block selects the initialization compensation operation, the scan driver performs a dummy scan operation by sequentially providing the second scan signals to the plurality of pixels in a blank period of the frame period. ### Claim 12 (depends on 8) The display device of claim 8, wherein, in a blank period of a first frame period in which the compensation operation selecting block selects the data compensation operation, the data driver outputs first blank data voltages to a plurality of data lines of the display panel, and wherein, in a blank period of a second frame period in which the compensation operation selecting block selects the initialization compensation operation, the data driver outputs second blank data voltages, which are different from the first blank data voltages, to the plurality of data lines. ### Claim 13 (depends on 12) The display device of claim 12, wherein the first blank data voltages are minimum data voltages corresponding to a minimum gray level. ### Claim 14 (depends on 12) The display device of claim 12, wherein the first blank data voltages are lower than a minimum data voltage corresponding to a minimum gray level. ### Claim 15 (depends on 12) The display device of claim 12, wherein the second blank data voltages are equal to the data voltages provided to a last pixel row of the display panel in an active period of the second frame period. ### Claim 16 (depends on 12) The display device of claim 12, wherein the second blank data voltages are boosted voltages which are increased from the data voltages provided to a last pixel row of the display panel in an active period of the second frame period. ### Claim 17 (depends on 12) The display device of claim 12, wherein the second blank data voltages are an initialization voltage. ### Claim 18 (depends on 8) The display device of claim 8, wherein a blank period of the frame period includes a sensing period and a recovery period, wherein the panel driver further includes: a sensing circuit which performs a sensing operation on selected pixels among the plurality of pixels in the sensing period, wherein, in the sensing period, the data driver outputs sensing data voltages to data lines which are connected to the selected pixels among a plurality of data lines of the display panel, and outputs first blank data voltages to data lines which are not connected to the selected pixels among the plurality of data lines, and wherein, in the recovery period, the data driver outputs recovery data voltages equal to the data voltages provided in the active period to the plurality of data lines. ### Claim 19 A display device comprising: a display panel including a plurality of pixels; and a panel driver which drives the display panel based on input image data, wherein, in a variable frame mode in which the panel driver receives the input image data at a variable frame frequency, the panel driver selectively performs a data compensation operation or an initialization compensation operation based on a luminance of the display panel and a frequency change amount of the variable frame frequency, and wherein the panel driver outputs first blank data voltages in a blank period of a first frame period in which the data compensation operation is performed, and outputs second blank data voltages, which are different from the first blank data voltages, in a blank period of a second frame period in which the initialization compensation operation is performed. ### Claim 20 An electronic device comprising: a processor which provides input image data at a variable frame frequency in a variable frame mode; and a display device comprising: a display panel including a plurality of pixels; and a panel driver which drives the display panel based on the input image data, wherein, in the variable frame mode, the panel driver selectively performs a data compensation operation or an initialization compensation operation based on a luminance of the display panel and a frequency change amount of the variable frame frequency.