# US 12,183,231 B1 · Display driving circuit including source driver sensing noise occurrence and method for driving display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,231 B1 - Document ID: US12183231B1 - Status: Granted - Kind: B1 - Application number: 18/479,124 - Filed: 2023-10-02 - Granted: 2024-12-31 - Earliest claimed: 2023-10-02 - Assignees: Novatek Microelectronics Corp. - Applicants: Novatek Microelectronics Corp. - Inventors: Hsi-Mao Yu; Te-Hsien Kuo - Web page: https://patentgrep.com/patent/US12183231B1 ## CPC - G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)} - 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 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2330/06: Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation - G09G 2360/12: Frame memory handling - 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 driving circuit adapted to drive a display panel to display an image is provided. The display driving circuit includes a source driver circuit and a timing controller circuit. The source driver circuit is configured to sense whether noise occurs and output a lock signal. The lock signal indicates whether the noise occurs. The timing controller circuit is coupled to the source driver circuit, and configured to output image data to the source driver circuit and receive the lock signal from the source driver circuit. The timing controller circuit adjusts a data depth of the image data or a frame rate of the display panel when the lock signal indicates the noise occurs. ## Claims ### Claim 1 A display driving circuit, adapted to drive a display panel to display an image, the display driving circuit comprising: a source driver circuit, configured to sense whether noise occurs and output a lock signal, wherein the lock signal indicates whether the noise occurs; and a timing controller circuit, coupled to the source driver circuit, and configured to output image data to the source driver circuit and receive the lock signal from the source driver circuit, wherein the timing controller circuit adjusts a data depth of the image data or a frame rate of the display panel when the lock signal indicates that the noise occurs, wherein the timing controller circuit adjusts the data depth of the image data from a first data depth to a second data depth during an active period of a frame period, wherein the first data depth is larger than the second data depth, wherein the timing controller circuit recovers the data depth of the image data from the second data depth to the first data depth during a V-blanking period of the frame period. ### Claim 2 (depends on 1) The display driving circuit of claim 1, wherein the second data depth is maintained for a predetermined period, and the predetermined period is determined by the timing controller circuit. ### Claim 3 (depends on 1) The display driving circuit of claim 1, wherein the lock signal comprises a first signal level and a second signal level, and the second signal level is lower than the first signal level, wherein the first signal level of the lock signal indicates that the noise does not occur, and the second signal level of the lock signal indicates that the noise occurs. ### Claim 4 A display driving circuit, adapted to drive a display panel to display an image, the display driving circuit comprising: a source driver circuit, configured to sense whether noise occurs and output a lock signal, wherein the lock signal indicates whether the noise occurs; and a timing controller circuit, coupled to the source driver circuit, and configured to output image data to the source driver circuit and receive the lock signal from the source driver circuit, wherein the timing controller circuit adjusts a frame rate of the display panel when the lock signal indicates that the noise occurs, wherein the timing controller circuit adjusts the frame rate of the display panel from a first frame rate to a second frame rate during a next frame period, wherein the first frame rate is larger than the second frame rate, wherein the timing controller circuit recovers the frame rate of the display panel from the second frame rate to the first frame rate during a V-blanking period of the frame period. ### Claim 5 (depends on 4) The display driving circuit of claim 4, wherein the second frame rate is maintained for a predetermined period, and the predetermined period is determined by the timing controller circuit. ### Claim 6 A method for driving a display panel, the method comprising steps of: sensing whether noise occurs and outputting a lock signal, wherein the lock signal indicates whether the noise occurs; adjusting a data depth of an image data when the lock signal indicates that the noise occurs, wherein the data depth of the image data is adjusted from a first data depth to a second data depth during an active period of a frame period, wherein the first data depth is larger than the second data depth; recovering the data depth of the image data from the second data depth to the first data depth during a V-blanking period of the frame period; and driving the display panel to display an image according to the image data. ### Claim 7 (depends on 6) The method for driving the display panel of claim 6, wherein the second data depth is maintained for a predetermined period, and the predetermined period is determined by a timing controller circuit. ### Claim 8 (depends on 6) The method for driving the display panel of claim 6, further comprising: not adjusting the data depth of the image data when the lock signal indicates that the noise does not occur. ### Claim 9 (depends on 6) The method for driving the display panel of claim 6, wherein the lock signal comprises a first signal level and a second signal level, and the second signal level is lower than the first signal level, wherein the first signal level of the lock signal indicates that the noise does not occur, and the second signal level of the lock signal indicates that the noise occurs. ### Claim 10 A method for driving a display panel, the method comprising steps of: sensing whether noise occurs and outputting a lock signal, wherein the lock signal indicates whether the noise occurs; adjusting a frame rate of the display panel when the lock signal indicates that the noise occurs, wherein the frame rate of the display panel is adjusted from a first frame rate to a second frame rate during a next frame period, wherein the first frame rate is larger than the second frame rate; recovering the frame rate of the display panel from the second frame rate to the first frame rate during a V-blanking period of the frame period; and driving the display panel to display an image according to the frame rate. ### Claim 11 (depends on 10) The method for driving the display panel of claim 10, wherein the second frame rate is maintained for a predetermined period, and the predetermined period is determined by a timing controller circuit. ### Claim 12 (depends on 10) The method for driving the display panel of claim 10, further comprising: not adjusting the frame rate of the display panel when the lock signal indicates that the noise does not occur. ### Claim 13 (depends on 10) The method for driving the display panel of claim 10, wherein the lock signal comprises a first signal level and a second signal level, and the second signal level is lower than the first signal level, wherein the first signal level of the lock signal indicates that the noise does not occur, and the second signal level of the lock signal indicates that the noise occurs.