# US 12,118,955 B2 · Driving method and driving circuit of display panel, and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,118,955 B2 - Document ID: US12118955B2 - Status: Granted - Kind: B2 - Application number: 18/337,607 - Filed: 2023-06-20 - Published: 2024-03-14 - Granted: 2024-10-15 - Earliest claimed: 2022-09-09 - Assignees: Hkc Corporation Limited - Applicants: Hkc Corporation Limited - Inventors: Long Zhu; Haijiang Yuan - Web page: https://patentgrep.com/patent/US12118955B2 ## CPC - G09G 3/3655: {Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors} - G09G 3/2007: {Display of intermediate tones} - G09G 3/3614: {Control of polarity reversal in general} - G09G 2300/0426: Layout of electrodes and connections - G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2320/0252: Improving the response speed - 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 driving method and a driving circuit for a display panel, and a display device. In the driving method, a binding-point voltage is first detected and a voltage difference between the binding-point voltage and a common-electrode voltage is obtained through a calculation. In case that the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than a preset voltage difference, an existence of a problem of bright and dark lines on the display panel is indicated, the data voltage waveform has a ramp-up, and a charging rate of a blue pixel or a green pixel is insufficient, in this case, the binding-point voltage, i.e., a charging voltage of the red pixel is boosted to reduce a charging loss during a ramp-up process, and to increase the charging rate, so that the bright and dark lines of the display panel can be improved, thereby improving the display effect. ## Claims ### Claim 1 A driving method for a display panel, the display panel comprising a plurality of data lines, a plurality of scan lines and a plurality of pixel groups arranged in an array, each pixel group comprising a red pixel, a green pixel and a blue pixel, arranged in sequence along a row direction, multiple pixels in a same column are sequentially cross-connected to data lines in two adjacent columns, and multiple pixels in a same row are respectively connected to data lines in different columns; wherein a binding-point voltage corresponding to a gray scale of a binding point of the green pixel or the blue pixel is equal to a charging voltage of the red pixel; the driving method for the display panel comprising: detecting the binding-point voltage and obtaining, through a calculation, a voltage difference between the binding-point voltage and a common-electrode voltage; boosting the binding-point voltage to a preset binding-point voltage when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than a preset voltage difference; and performing a line-by-line scan charging on each row of pixels by using the boosted binding-point voltage to charge the green pixel or the blue pixel to a charging voltage corresponding to a target gray scale, and to charge the red pixel to the preset binding-point voltage. ### Claim 2 (depends on 1) The driving method for the display panel according to claim 1, wherein the binding-point voltage comprises a binding-point voltage of positive polarity and a binding-point voltage of negative polarity, and the preset binding-point voltage comprises a preset binding-point voltage of positive polarity and a preset binding-point voltage of negative polarity; said boosting the binding-point voltage to a preset binding-point voltage when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than a preset voltage difference further comprises: boosting the binding-point voltage of positive polarity to the preset binding-point voltage of positive polarity when a voltage difference between the binding-point voltage of positive polarity and the common-electrode voltage is smaller than the preset voltage difference; and boosting the binding-point voltage of negative polarity to the preset binding-point voltage of negative polarity when a voltage difference between the binding-point voltage of negative polarity and the common-electrode voltage is smaller than the preset voltage difference. ### Claim 3 (depends on 2) The driving method for the display panel according to claim 2, further comprising: boosting the binding-point voltage to the preset binding-point voltage and increasing a charging time of each pixel to a preset charging time when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than the preset voltage difference. ### Claim 4 (depends on 3) The driving method for the display panel according to claim 3, wherein the charging time is equal to a difference between a refresh time and a dead time of each row of pixels; said boosting the binding-point voltage and increasing the charging time of each pixel when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than the preset voltage difference further comprises: maintaining the refresh time of each row of pixels unchanged, and increasing the charging time of each pixel to the preset charging time when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than the preset voltage difference; or maintaining the dead time of each row of pixels unchanged, and increasing the refresh time of each pixel, to enable the charging time of each pixel to be increased to the preset charging time when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than the preset voltage difference. ### Claim 5 (depends on 4) The driving method for the display panel according to claim 4, further comprising: invoking data in a preset data mapping table to perform a voltage compensation on a target voltage corresponding to the target gray scale of the green pixel and the blue pixel, and to perform the voltage compensation on the charging voltage of the red pixel. ### Claim 6 (depends on 5) The driving method for the display panel according to claim 5, wherein said invoking data in the preset data mapping table to perform the voltage compensation on a target voltage corresponding to the target gray scale of the green pixel and the blue pixel, and to perform the voltage compensation on the charging voltage of the red pixel, further comprises: obtaining the target voltage corresponding to the target gray scale of the green pixel and the blue pixel of each row to be scanned and the preset binding-point voltage; invoking, according to the target voltage corresponding to the target gray scale of the green pixel and the blue pixel of each row to be scanned and the preset binding-point voltage, a compensation voltage mapped with each target voltage and the preset binding point voltage in the preset data mapping table; and outputting the compensation voltage to perform the voltage compensation on the target voltage and the preset binding-point voltage of each row of pixels to be scanned. ### Claim 7 (depends on 6) The driving method for the display panel according to claim 6, wherein a magnitude of the compensation voltage is in a positive correlation with the target voltage of each row of pixels and the magnitude of the preset binding-point voltage. ### Claim 8 (depends on 1) The driving method for the display panel according to claim 1, further comprising: inverting a polarity of each of the data lines in a frame inversion mode and/or in a column inversion mode; wherein the frame inversion mode is that a polarity of a data line in one frame and a polarity of the same data line in an adjacent frame are opposite; and the column inversion mode is that the polarities of adjacent data lines in a same frame are opposite. ### Claim 9 A driving circuit for a display panel, the display panel comprising a plurality of data lines, a plurality of scan lines and a plurality of pixel groups arranged in an array, each pixel group comprising a red pixel, a green pixel and a blue pixel, arranged in sequence along a row direction, multiple pixels in a same column are sequentially cross-connected to data lines in two adjacent columns, and multiple pixels in a same row are respectively connected to data lines in different columns, wherein a binding-point voltage corresponding to a gray scale of a binding point of the green pixel or the blue pixel is equal to a charging voltage of the red pixel; the driving circuit comprising: a source drive circuit, connected to the plurality of data lines of the display panel; a gate drive circuit; connected to the plurality of scan lines of the display panel; and a timing controller, connected to the source drive circuit and the gate drive circuit respectively, the timing controller comprising a memory, a processor and a display-panel driver program stored in the memory and executable on the processor, wherein the display-panel driver program, when executed by the processor, causes the processor to perform operations that comprise: detecting the binding-point voltage and obtaining, through a calculation, a voltage difference between the binding-point voltage and a common-electrode voltage; boosting the binding-point voltage to a preset binding-point voltage when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than a preset voltage difference; and performing a line-by-line scan charging on each row of pixels by using the boosted binding-point voltage to charge the green pixel or the blue pixel to a charging voltage corresponding to a target gray scale, and to charge the red pixel to the preset binding-point voltage. ### Claim 10 (depends on 9) The driving circuit for the display panel according to claim 9, wherein the binding-point voltage comprises a binding-point voltage of positive polarity and a binding-point voltage of negative polarity, and the preset binding-point voltage comprises a preset binding-point voltage of positive polarity and a preset binding-point voltage of negative polarity; the operation of boosting the binding-point voltage to a preset binding-point voltage when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than a preset voltage difference further comprises: boosting the binding-point voltage of positive polarity to the preset binding-point voltage of positive polarity when a voltage difference between the binding-point voltage of positive polarity and the common-electrode voltage is smaller than the preset voltage difference; and boosting the binding-point voltage of negative polarity to the preset binding-point voltage of negative polarity when a voltage difference between the binding-point voltage of negative polarity and the common-electrode voltage is smaller than the preset voltage difference. ### Claim 11 (depends on 10) The driving circuit for the display panel according to claim 10, wherein the operations further comprise: boosting the binding-point voltage to the preset binding-point voltage and increasing a charging time of each pixel to a preset charging time when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than the preset voltage difference. ### Claim 12 (depends on 11) The driving circuit for the display panel according to claim 11, wherein the charging time is equal to a difference between a refresh time and a dead time of each row of pixels; said boosting the binding-point voltage and increasing the charging time of each pixel when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than the preset voltage difference further comprises: maintaining the refresh time of each row of pixels unchanged, and increasing the charging time of each pixel to the preset charging time when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than the preset voltage difference; or, maintaining the dead time of each row of pixels unchanged and increasing the refresh time of each pixel, to enable the charging time of each pixel to be increased to the preset charging time when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than the preset voltage difference. ### Claim 13 (depends on 12) The driving circuit for the display panel according to claim 12, wherein the operations further comprise: invoking data in a preset data mapping table to perform a voltage compensation on a target voltage corresponding to the target gray scale of the green pixel and the blue pixel, and to perform the voltage compensation on the charging voltage of the red pixel. ### Claim 14 (depends on 13) The driving circuit for the display panel according to claim 13, wherein said invoking data in the preset data mapping table to perform the voltage compensation on a target voltage corresponding to the target gray scale of the green pixel and the blue pixel, and to perform the voltage compensation on the charging voltage of the red pixel, further comprises: obtaining the target voltage corresponding to the target gray scale of the green pixel and the blue pixel of each row to be scanned and the preset binding-point voltage; invoking, according to the target voltage corresponding to the target gray scale of the green pixel and the blue pixel of each row to be scanned and the preset binding-point voltage, a compensation voltage mapped with each target voltage and the preset binding point voltage in the preset data mapping table; and outputting the compensation voltage to perform the voltage compensation on the target voltage and the preset binding-point voltage of each row of pixels to be scanned. ### Claim 15 (depends on 14) The driving circuit for the display panel according to claim 14, wherein a magnitude of the compensation voltage is in a positive correlation with the target voltage of each row of pixels and the magnitude of the preset binding-point voltage. ### Claim 16 (depends on 9) The driving circuit for the display panel according to claim 9, wherein the operations further comprise: inverting a polarity of each of the data lines in a frame inversion mode and/or in a column inversion mode; wherein the frame inversion mode is that a polarity of a data line in one frame and a polarity of the same data line in an adjacent frame are opposite; and the column inversion mode is that the polarities of adjacent data lines in a same frame are opposite. ### Claim 17 A display device, comprising: a backlight source; a display panel comprising a plurality of data lines, a plurality of scan lines and a plurality of pixel groups arranged in an array, each pixel group comprising a red pixel, a green pixel and a blue pixel, arranged in sequence along a row direction, multiple pixels in a same column are sequentially cross-connected to data lines in two adjacent columns, and multiple pixels in a same row are respectively connected to data lines in different columns, wherein a binding-point voltage corresponding to a gray scale of a binding point of the green pixel or the blue pixel is equal to a charging voltage of the red pixel; and a drive circuit for the display panel, the display panel being correspondingly connected to the drive circuit for the display panel, the driving circuit comprising: a source drive circuit connected to the plurality of data lines of the display panel; a gate drive circuit connected to the plurality of scan lines of the display panel; and a timing controller connected to the source drive circuit and the gate drive circuit respectively, the timing controller comprising a memory, a processor and a display-panel driver program stored in the memory and executable on the processor, wherein the display-panel driver program, when executed by the processor, causes the processor to perform operations that comprise: detecting the binding-point voltage and obtaining, through a calculation, a voltage difference between the binding-point voltage and a common-electrode voltage; boosting the binding-point voltage to a preset binding-point voltage when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than a preset voltage difference; and performing a line-by-line scan charging on each row of pixels by using the boosted binding-point voltage to charge the green pixel or the blue pixel to a charging voltage corresponding to a target gray scale, and to charge the red pixel to the preset binding-point voltage. ### Claim 18 (depends on 17) The display device according to claim 17, wherein the binding-point voltage comprises a binding-point voltage of positive polarity and a binding-point voltage of negative polarity, and the preset binding-point voltage comprises a preset binding-point voltage of positive polarity and a preset binding-point voltage of negative polarity; the operation of boosting the binding-point voltage to a preset binding-point voltage when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than a preset voltage difference further comprises: boosting the binding-point voltage of positive polarity to the preset binding-point voltage of positive polarity when a voltage difference between the binding-point voltage of positive polarity and the common-electrode voltage is smaller than the preset voltage difference; and boosting the binding-point voltage of negative polarity to the preset binding-point voltage of negative polarity when a voltage difference between the binding-point voltage of negative polarity and the common-electrode voltage is smaller than the preset voltage difference. ### Claim 19 (depends on 18) The display device according to claim 18, wherein the operations further comprise: boosting the binding-point voltage to the preset binding-point voltage and increasing a charging time of each pixel to a preset charging time when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than the preset voltage difference. ### Claim 20 (depends on 19) The display device according to claim 19, wherein the charging time is equal to a difference between a refresh time and a dead time of each row of pixels; said boosting the binding-point voltage and increasing the charging time of each pixel when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than the preset voltage difference further comprises: maintaining the refresh time of each row of pixels unchanged, and increasing the charging time of each pixel to the preset charging time when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than the preset voltage difference; or maintaining the dead time of each row of pixels unchanged, and increasing the refresh time of each pixel, to enable the charging time of each pixel to be increased to the preset charging time when the voltage difference between the binding-point voltage and the common-electrode voltage is smaller than the preset voltage difference.