# US 2021/0241701 A1 · Display device driving method and related driver circuit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0241701 A1 - Document ID: US20210241701A1 - Status: Published application - Kind: A1 - Application number: 16/779,662 - Filed: 2020-02-02 - Published: 2021-08-05 - Earliest claimed: 2020-02-02 - Assignees: Novatek Microelectronics Corp. - Applicants: NOVATEK Microelectronics Corp. - Inventors: Chieh-Hsiang CHANG; Shih-Hsiang PAN; Chi-Hung LIN; Wen-Pin TSAI; Huang-Chin TANG - Web page: https://patentgrep.com/patent/US20210241701A1 ## 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 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 2310/0248: Precharge or discharge of column electrodes before or after applying exact column voltages - G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit - G09G 2310/0297: Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns - 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 A display device driving method, suitable for a driver circuit, includes the following steps: determining magnitude of a plurality of data voltages according to received display data, and the plurality of data voltages are configured to be transmitted to a plurality of pixel circuits via a plurality of data lines; comparing the magnitude of the plurality of data voltages to generate a comparison result; and before providing corresponding ones of the plurality of data voltages to a first pixel group arranged at an i-th row of the plurality of pixel circuits, providing a first reset voltage having a value determined according to the comparison result to the plurality of data lines, or providing a second reset voltage to m data lines selected according to the comparison result from the plurality of data lines, i is a positive integer, and m is an integer. ## Claims ### Claim 1 A display device driving method, suitable for a driver circuit, comprising: determining magnitude of a plurality of data voltages according to received display data, wherein the plurality of data voltages are configured to be transmitted to a plurality of pixel circuits via a plurality of data lines; comparing the magnitude of the plurality of data voltages to generate a comparison result; and before providing corresponding ones of the plurality of data voltages to a first pixel group arranged at an i-th row of the plurality of pixel circuits, providing a reset voltage to some of the plurality of data lines selected according to the comparison result while without providing the reset voltage to the other of the plurality of data lines, wherein i is a positive integer. ### Claim at position 2 2-4. (canceled) ### Claim 5 (depends on 1) The method of claim 1, wherein the operation of comparing the magnitude of the plurality of data voltages comprises: identifying magnitude of a plurality of first data voltages of the plurality of data voltages, wherein the plurality of first data voltages are configured to be provided to the first pixel group; identifying magnitude of a plurality of second data voltages of the plurality of data voltages, wherein the plurality of second data voltages are configured to be provided to a second pixel group arranged at an (i−1)-th row of the plurality of pixel circuits; and comparing the magnitude of each of the plurality of first data voltages with the magnitude of each of the plurality of second data voltages, wherein the first data voltage and the second data voltage being compared with each other are transmitted via a same data line of the plurality of data lines. ### Claim 6 (depends on 5) The method of claim 5, wherein the operation of providing the reset voltage to the some of the plurality of data lines selected according to the comparison result while without providing the reset voltage to the other of the plurality of data lines comprises: if some of the plurality of first data voltages are lower than corresponding ones of the plurality of second data voltages, selecting the some of the plurality of data lines that transmitting the some of the plurality of first data voltages to receive the reset voltage different from the corresponding ones of the plurality of second data voltages before providing the plurality of first data voltages to the first pixel group. ### Claim 7 (depends on 5) The method of claim 5, wherein the operation of providing the reset voltage to the some of the plurality of data lines selected according to the comparison result while without providing the reset voltage to the other of the plurality of data lines comprises: if some of the plurality of first data voltages are higher than corresponding ones of the plurality of second data voltages, selecting the some of the plurality of data lines that transmitting the some of the plurality of first data voltages to receive the reset voltage different from the corresponding ones of the plurality of second data voltages before providing the plurality of first data voltages to the first pixel group. ### Claim 8 (depends on 5) The method of claim 5, further comprising: If the plurality of first data voltages are corresponding to a lowest gray scale value identified by the display data, providing the plurality of first data voltages to the first pixel group without comparing the magnitude of each of the plurality of first data voltages with the magnitude of each of the plurality of second data voltages. ### Claim 9 (depends on 5) The method of claim 5, wherein the operation of comparing the magnitude of the plurality of data voltages further comprises: identifying a maximum voltage or a minimum voltage among the plurality of first data voltages. ### Claim 10 (depends on 9) The method of claim 9, wherein the operation of providing the reset voltage to the some of the plurality of data lines selected according to the comparison result while without providing the reset voltage to the other of the plurality of data lines comprises: if some of the plurality of first data voltages are lower than corresponding ones of the plurality of second data voltages, selecting the some of the plurality of data lines that transmitting the some of the plurality of first data voltages to receive the reset voltage being equal to the minimum voltage before providing the plurality of first data voltages to the first pixel group. ### Claim 11 (depends on 9) The method of claim 9, wherein the operation of providing the reset voltage to the some of the plurality of data lines selected according to the comparison result while without providing the reset voltage to the other of the plurality of data lines comprises: if some of the plurality of first data voltages are higher than corresponding ones of the second data voltages, selecting the some of the plurality of data lines that transmitting the some of the plurality of first data voltages to receive the reset voltage being equal to the maximum voltage before providing the plurality of first data voltages to the first pixel group. ### Claim 12 A driver circuit configured to be coupled with a plurality of pixel circuits through a plurality of data lines, being adapted to: determine magnitude of a plurality of data voltages according to received display data, wherein the plurality of data voltages are configured to be transmitted to the plurality of pixel circuits via the plurality of data lines; compare the magnitude of the plurality of data voltages to generate a comparison result; and before provide corresponding ones of the plurality of data voltages to a first pixel group arranged at an i-th row of the plurality of pixel circuits, provide a reset voltage to some of the plurality of data lines selected according to the comparison result while without providing the reset voltage to the other of the plurality of data lines, wherein i is a positive integer. ### Claim at position 11 13-15. (canceled) ### Claim 16 (depends on 12) The driver circuit of claim 12, wherein when the driver circuit compares the magnitude of the plurality of data voltages, the driver circuit is further adapted to: identify magnitude of a plurality of first data voltages of the plurality of data voltages, wherein the plurality of first data voltages are configured to be provided to the first pixel group; identify magnitude of a plurality of second data voltages of the plurality of data voltages, wherein the plurality of second data voltages are configured to be provided to a second pixel group arranged at an (i−1)-th row of the plurality of pixel circuits; and compare the magnitude of each of the plurality of first data voltages with the magnitude of each of the plurality of second data voltages, wherein the first data voltage and the second data voltage being compared with each other are transmitted via a same data line of the plurality of data lines. ### Claim 17 (depends on 16) The driver circuit of claim 16, wherein the driver circuit is configured to be coupled with the plurality of data lines through a multiplexer comprising a plurality of switches, and the driver circuit is configured to provide a plurality of control signals respectively to the plurality of switches, if some of the plurality of first data voltages are lower than corresponding ones of the plurality of second data voltages, the driver circuit sets corresponding ones of the plurality of control signals to a logic high level to select the some of the plurality of data lines to receive the reset voltage different from the corresponding ones of the plurality of second data voltages before providing the plurality of first data voltages to the first pixel group. ### Claim 18 (depends on 16) The driver circuit of claim 16, wherein the driver circuit is configured to be coupled with the plurality of data lines through a multiplexer comprising a plurality of switches, and the driver circuit is configured to provide a plurality of control signals respectively for the plurality of switches, if some of the plurality of first data voltages are higher than corresponding ones of the second data voltages, the driver circuit sets the corresponding ones of the plurality of control signals to a logic high level to select the some of the plurality of data lines to receive the reset voltage different from the corresponding ones of the plurality of second data voltages before providing the plurality of first data voltages to the first pixel group. ### Claim 19 (depends on 16) The driver circuit of claim 16, wherein the driver circuit is further adapted to: If the plurality of first data voltages are corresponding to a lowest gray scale value identified by the display data, provide the plurality of first data voltages to the first pixel group without comparing the magnitude of each of the plurality of first data voltages with the magnitude of each of the plurality of second data voltages. ### Claim 20 (depends on 16) The driver circuit of claim 16, wherein when the driver circuit compares the magnitude of the plurality of data voltages, the driver circuit is further adapted to identify a maximum voltage or a minimum voltage among the plurality of first data voltages. ### Claim 21 (depends on 20) The driver circuit of claim 20, wherein the driver circuit is configured to be coupled with the plurality of data lines through a multiplexer comprising a plurality of switches, and the driver circuit is configured to provide a plurality of control signals correspondingly to the plurality of switches, if some of the plurality of first data voltages are lower than corresponding ones of the second data voltages, the driver circuit sets corresponding ones of the plurality of control signals to a logic high level to select the some of the plurality of data lines to receive the reset voltage being equal to the minimum voltage before providing the plurality of first data voltages to the first pixel group. ### Claim 22 (depends on 20) The driver circuit of claim 20, wherein the driver circuit is configured to be coupled with the plurality of data lines through a multiplexer comprising a plurality of switches, and the driver circuit is configured to provide a plurality of control signals correspondingly for the plurality of switches, if some of the plurality of first data voltages are higher than corresponding ones of the second data voltages, the driver circuit sets corresponding ones of the plurality of control signals to a logic high level to select the some of the plurality of data lines to receive the reset voltage being equal to the maximum voltage before providing the plurality of first data voltages to the first pixel group.