# US 10,872,548 B2 · Display apparatus for alleviating a problem of image flicker by regulating a common voltage > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,872,548 B2 - Document ID: US10872548B2 - Status: Granted - Kind: B2 - Application number: 16/329,165 - Filed: 2018-06-28 - Published: 2020-01-09 - Granted: 2020-12-22 - Earliest claimed: 2018-03-28 - Assignees: Hkc Corporation Limited; Chongqing Hkc Optoelectronics Technology Co., Ltd. - Applicants: HKC Corporation Limited; Chongqing HKC Optoelectronics Technology Co., Ltd. - Inventors: Wenqin Zhao - Web page: https://patentgrep.com/patent/US10872548B2 ## CPC - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G09G 3/3655: {Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors} - G09G 3/3696: {Generation of voltages supplied to electrode drivers} - G09G 2310/027: Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters - 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 2320/0673: for control of gamma adjustment, e.g. selecting another gamma curve - 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 This application provides a display apparatus and a driving method therefor. The display apparatus includes: a display panel, including a first input line and a first output line, where the first input line obtains a common voltage, and the first output line outputs a common feedback voltage; a voltage regulating unit, including a second output line, where the second output line outputs the common voltage; and a timing controller, including a control line and a second input line, where the control line outputs a voltage regulating signal, and the second input line obtains the common feedback voltage, where the timing controller continuously obtains the common feedback voltage, and selects, from common feedback voltage values, several voltage values as a regulation condition, and outputs the voltage regulating signal according to the regulation condition, where the voltage regulating unit regulates the common voltage according to the voltage regulating signal. ## Claims ### Claim 1 A display apparatus, comprising: a display panel, comprising a first input line and a first output line, wherein the first input line obtains a common voltage, and the first output line outputs a common feedback voltage; a voltage regulating unit, comprising a second output line, wherein the second output line outputs the common voltage, and the voltage regulating unit is a digital voltage regulator and is electrically connected to the display panel; and a timing controller, comprising a control line and a second input line, wherein the control line outputs a voltage regulating signal, and the second input line obtains the common feedback voltage, wherein the timing controller is electrically connected to the display panel and the voltage regulating unit; the timing controller continuously obtains the common feedback voltage at a speed twice a frame rate, obtains a maximum feedback voltage and a minimum feedback voltage from the common feedback voltage in a period, and the timing controller calculates a deviation value according to the maximum feedback voltage and the minimum feedback voltage; when the deviation value exceeds the voltage threshold, the timing controller outputs the voltage regulating signal, the voltage regulating unit regulates a voltage value range forward or backward by using the common voltage as a start according to the voltage regulating signal; and the timing controller continuously obtains the deviation value in a period of outputting the voltage regulating signal; and when the timing controller obtains a minimum deviation value from the deviation value and the minimum deviation value is less than the voltage threshold, the timing controller stops sending the voltage regulating signal, so that the voltage regulating unit stops regulating the common voltage. ### Claim 2 (depends on 1) The display apparatus according to claim 1, wherein an analog or digital signal converter is set between the voltage regulating unit and the display panel. ### Claim 3 (depends on 1) The display apparatus according to claim 1, wherein the analog or digital signal converter converts the common feedback voltage into a digital signal. ### Claim 4 A display apparatus, comprising: a display panel, comprising a first input line and a first output line, wherein the first input line obtains a common voltage, and the first output line outputs a common feedback voltage; a voltage regulating unit, comprising a second output line, wherein the second output line outputs the common voltage, and the voltage regulating unit is a mechanical voltage regulator and is electrically connected to the display panel; and a timing controller, comprising a control line and a second input line, wherein the control line outputs a voltage regulating signal, and the second input line obtains the common feedback voltage, wherein the timing controller is electrically connected to the display panel and the voltage regulating unit; the timing controller continuously obtains the common feedback voltage at a speed twice a frame rate, obtains a maximum feedback voltage and a minimum feedback voltage from the common feedback voltage in a period, and the timing controller calculates a deviation value according to the maximum feedback voltage and the minimum feedback voltage; when the deviation value exceeds the voltage threshold, the timing controller outputs the voltage regulating signal, the voltage regulating unit regulates a voltage value range forward or backward by using the common voltage as a start according to the voltage regulating signal; and the timing controller continuously obtains the deviation value in a period of outputting the voltage regulating signal; and when the timing controller obtains a minimum deviation value from the deviation value and the minimum deviation value is less than the voltage threshold, the timing controller stops sending the voltage regulating signal, so that the voltage regulating unit stops regulating the common voltage.