# US 11,443,700 B2 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,443,700 B2 - Document ID: US11443700B2 - Status: Granted - Kind: B2 - Application number: 17/182,037 - Filed: 2021-02-22 - Published: 2021-06-17 - Granted: 2022-09-13 - Earliest claimed: 2015-10-28 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Si-Beak Pyo; Won-Ju Shin; Kyung-Ho Hwang - Web page: https://patentgrep.com/patent/US11443700B2 ## CPC - 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 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/3258: with pixel circuitry controlling the voltage across 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 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes - G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit - 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 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes - G09G 2320/045: Compensation of drifts in the characteristics of light emitting or modulating elements - G09G 2330/021: Power management, e.g. power saving - 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 gate line, a data line, and a pixel at a crossing region of the gate line and the data line, a timing controller configured to generate a gate driving control signal, a data driving control signal, and a power control signal based on a display period corresponding to a time interval of frames, a gate driver configured to provide a gate signal to the pixel through the gate line based on the gate driving control signal, a data driver configured to provide a data signal to the pixel through the data line based on the data driving control signal, and a power supply configured to generate a power voltage to drive the pixel, and configured to adjust the power voltage based on the power control signal during the display period. ## Claims ### Claim 1 A display device comprising: a display panel comprising a gate line, a data line, and a pixel at a crossing region of the gate line and the data line; a timing controller configured to generate a gate driving control signal, a data driving control signal, and a power control signal that is determined based on a length of a display period corresponding to a time interval of frames; a gate driver configured to provide a gate signal to the pixel through the gate line based on the gate driving control signal; and a data driver configured to provide a data signal to the pixel through the data line based on the data driving control signal, wherein a power voltage for driving the pixel is provided to the pixel through a power line. ### Claim 2 (depends on 1) The display device of claim 1, wherein the timing controller is configured to select one of a plurality of display periods of different lengths as the display period based on input image data. ### Claim 3 (depends on 2) The display device of claim 2, wherein each of the plurality of display periods corresponds to a responsiveness of a user for a corresponding image. ### Claim 4 (depends on 2) The display device of claim 2, wherein the timing controller is configured to: calculate an on-pixel ratio corresponding to the input image data; determine whether an input image corresponds to a special image when the on-pixel ratio is within a reference range; and select a third display period from among the plurality of display periods when the input image corresponds to the special image. ### Claim 5 (depends on 2) The display device of claim 2, wherein the timing controller is configured to: determine whether an input image corresponds to a video, or corresponds to a still image, based on the input image data; select a first display period from among the plurality of display periods when the input image corresponds to the video; and select a second display period from among the plurality of display periods, which is greater than the first display period, when the input image corresponds to the still image. ### Claim 6 (depends on 5) The display device of claim 5, wherein the display period comprises a plurality of frame times, wherein the timing controller is configured to generate a mask signal that has a logic low level during a frame time from among the plurality of frame times, and that has a logic high level during a remainder of frame times from among the plurality of frame times, and wherein the frame time is an amount of time to display one frame. ### Claim 7 (depends on 6) The display device of claim 6, wherein the gate driver is configured to provide the gate signal to the pixel based on the mask signal during the frame, and is configured to stop providing the gate signal to the pixel based on the mask signal during the remainder of frame times. ### Claim 8 (depends on 1) The display device of claim 1, further comprising a light emission driver configured to generate a light emission control signal to control an off-duty ratio of the pixel, and configured to adjust the off-duty ratio, which represents a ratio of light non-emission time of the pixel to light emission time of the pixel, based on the display period. ### Claim 9 (depends on 8) The display device of claim 8, wherein the light emission driver is configured to calculate the off-duty ratio based on input image data, and configured to gradually reduce the off-duty ratio during the display period. ### Claim 10 A display device comprising: a display panel comprising a gate line, a data line, a power line, and a pixel at a crossing region of the gate line, the data line, and the power line; a timing controller configured to generate a gate driving control signal, a data driving control signal, a second power control signal, and a switch control signal based on a display period representing a time interval of frames; and a driving circuit configured to provide a gate signal to the pixel through the gate line based on the gate driving control signal, and configured to provide a data signal to the pixel through the data line based on the data driving control signal, wherein a power voltage for driving the pixel is provided to the pixel through the power line, and wherein the driving circuit comprises: a charging pump unit configured to generate a secondary power voltage to be adjusted with time during the display period in response to the second power control signal; and a power selecting unit configured to connect the power line to a power supply or the charging pump unit based on the switch control signal.