# US 12,112,721 B2 · Apparatus and method for driving display based on frequency operation cycle set differently according to frequency > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,112,721 B2 - Document ID: US12112721B2 - Status: Granted - Kind: B2 - Application number: 17/370,069 - Filed: 2021-07-08 - Published: 2021-10-28 - Granted: 2024-10-08 - Earliest claimed: 2019-06-19 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Yongkoo Her; Youngdo Kim; Jungbae Bae; Hyunchang Shin; Joongyu Lee; Songhee Jung; Jaeseung Choi - Web page: https://patentgrep.com/patent/US12112721B2 ## CPC - G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - G09G 5/10: Intensity circuits - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/3406: {Control of illumination source (illumination devices structurally associated with liquid crystal cells G02F1/1336)} - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes - G09G 2320/064: by time modulation of the brightness of the illumination source - G09G 2330/022: in absence of operation, e.g. no data being entered during a predetermined time - G09G 2354/00: Aspects of interface with display user - 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 Various embodiments disclose a method and an apparatus including a display, a memory including information on a number of duty cycles per one refresh period for emitting light by pixels of the display corresponding to each of a plurality of refresh rates of the display, and a processor, wherein the processor is configured to control the electronic device to perform an operation according to a first number of duty cycles based on the display operating at a first refresh rate, and perform an operation according to a second number of duty cycles based on the display operating at a second refresh rate, wherein the first number is less than the second number based on the first refresh rate being higher than the second refresh rate. ## Claims ### Claim 1 An electronic device comprising: a display; a memory including information on duty cycles corresponding to each frequency of the display; and at least one processor, individually and/or collectively, configured to control the electronic device to: perform an operation according to a first duty cycle configuration based on the display operating at a first frequency; perform an operation according to a second duty cycle configuration based on the display operating at a second frequency; based on detecting an event while driving the display at the first frequency, switch to driving the display at the second frequency, wherein the switch is made after a duty cycle at the time the event occurred and before a first duty cycle in the first frequency expires; and increase a number of duty cycles in the second duty cycle configuration relative to a number of duty cycles in the first duty cycle configuration by a multiple of an integer based at least on a determination that the second frequency is decreased relative to the first frequency, wherein one duty cycle comprises a light emitting period and a non-light emitting period. ### Claim 2 (depends on 1) The electronic device of claim 1, wherein a length of the light emitting period is the same a length of the non-light emitting period. ### Claim 3 (depends on 1) The electronic device of claim 1, wherein a length of one duty cycle included in the first duty cycle configuration is the same as a length of one duty cycle included in the second duty cycle configuration. ### Claim 4 (depends on 1) The electronic device of claim 1, wherein the at least one processor is configured to control the electronic device to switch to driving the display at the second frequency depending on an application being executed. ### Claim 5 (depends on 1) The electronic device of claim 1, wherein the processor is configured to control the electronic device to switch to driving the display at the second frequency by stages. ### Claim 6 (depends on 1) The electronic device of claim 1, wherein the at least one processor is configured to predict gamma data of unsaved frequency of the display based on stored gamma data corresponding to specified frequency of the display. ### Claim 7 (depends on 1) The electronic device of claim 1, wherein the at least one processor is configured to include a black period in one frame based on the duty cycles corresponding to each frequency of the display. ### Claim 8 (depends on 1) The electronic device of claim 1, wherein the at least one processor is configured to include as many non-light emitting periods as a number of light emitting periods included in the first duty cycle configuration, as first black periods in the first duty cycle configuration. ### Claim 9 An operating method of an electronic device, the method comprising: operating according to a first duty cycle configuration based on a display of the electronic device operating at a first frequency; operating according to a second duty cycle configuration based on the display operating at a second frequency; increasing a number of duty cycles in the second duty cycle configuration relative to a number of duty cycles in the first duty cycle configuration by a multiple of an integer based at least on a determination that the second frequency is decreased relative to the first frequency; and based on detecting an event while driving the display at the first frequency, switching to driving the display at the second frequency, wherein the switch is made after a duty cycle at the time the event occurred and before a first duty cycle in the first frequency expires, wherein one duty cycle comprises a light emitting period and a non-light emitting period. ### Claim 10 (depends on 9) The method of claim 9, wherein a length of the light emitting period is the same a length of the non-light emitting period. ### Claim 11 (depends on 9) The method of claim 9, further comprising switching to driving the display at the second frequency depending on an application being executed. ### Claim 12 (depends on 9) The method of claim 9, further comprising switching to driving the display at the second frequency by stages.