# US 12,118,917 B2 · Driving system and driving method of display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,118,917 B2 - Document ID: US12118917B2 - Status: Granted - Kind: B2 - Application number: 17/600,396 - Filed: 2021-07-26 - Published: 2024-02-08 - Granted: 2024-10-15 - Earliest claimed: 2021-07-15 - Assignees: Tcl China Star Optoelectronics Technology Co., Ltd. - Applicants: TCL China Star Optoelectronics Technology Co., Ltd. - Inventors: Wenfang Li - Web page: https://patentgrep.com/patent/US12118917B2 ## CPC - G09G 3/2096: {Details of the interface to the display terminal specific for a flat panel (suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167)} - G09G 3/3266: Details of drivers for scan electrodes - G09G 3/2007: {Display of intermediate tones} - G09G 3/3611: {Control of matrices with row and column 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 2320/0209: Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display - G09G 2320/103: Detection of image changes, e.g. determination of an index representative of the image change - G09G 2330/021: Power management, e.g. power saving - G09G 2340/00: Aspects of display data processing - 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 system and a display panel are provided. The driving system includes a timing controller and a driving chip. The driving chip receives the video signal and processes the video signal to output a characteristic current or a regular current to the display panel. The driving chip outputs the characteristic current to the display panel when the driving chip receives the characteristic video signal and to output the regular current to the display panel when the driving chip receives the regular video signal, and the characteristic current is smaller than regular current. The driving system of the display panel according to the present disclosure could alleviate the capacitor coupling effect caused by the large voltage jump introduced by the huge gray value difference when the display panel in a frame transition and thus improve the horizontal crosstalk of the display panel. ## Claims ### Claim 1 A driving system of a display panel, the driving system comprising: a timing controller, connected to the display panel, configured to receive a V-by-one (VBO) information, analyze the VBO information, and output a corresponding video signal; wherein the video signal is a characteristic video signal or a regular video signal, and a display screen switching gray value difference corresponding to the characteristic video signal is greater than a display screen switching gray value difference corresponding to the regular video signal; and a driving chip, connected to the timing controller and the display panel, configured to receive the video signal and process the video signal to output a characteristic current or a regular current to the display panel; wherein the driving chip is configured to output the characteristic current to the display panel when the driving chip receives the characteristic video signal and to output the regular current to the display panel when the driving chip receives the regular video signal, and the characteristic current is smaller than regular current. ### Claim 2 (depends on 1) The driving system of claim 1, wherein the driving chip comprises: a data processing module, configured to receive the video signal and process the video signal to output a corresponding analog signal; a selecting module, configured to output a selection result according to the video signal; and a current driving module, configured to receive the analog signal and process the analog signal according to the selection result to output the characteristic current or the regular current to the display panel. ### Claim 3 (depends on 2) The driving system of claim 2, wherein the data processing module comprises: a register, configured to receive the video signal and temporarily store the video signal; a latch, configured to receive the video signal temporarily stored in the register and latch the video signal; a level shifter, configured to receive the video signal latched by the latch and process the video signal to output a digital signal; and a digital-to-analog converter, configured to receive the digital signal to output an analog signal. ### Claim 4 (depends on 2) The driving system of claim 2, wherein the selecting module comprises: a switch unit, comprising a first switch and a second switch; and a control unit, configured to turn on the first switch according to the characteristic video signal to output a characteristic current selection result and to turn on the second switch according to the regular video signal to output a regular current selection result. ### Claim 5 (depends on 4) The driving system of claim 4, wherein the current driving module comprises: a first current source, configured to receive the analog signal and process the analog signal to output the characteristic current according to the characteristic current selection result; a second current source, configured to receive the analog signal and process the analog signal to output the regular current according to the regular current selection result; and an amplifying unit, configured to amplify the characteristic current and the regular current and output an amplified characteristic current and an amplified regular current to the display panel; wherein the first switch is connected to the data processing module and the first current source and the second switch is connected to the data processing module and the second current source. ### Claim 6 (depends on 5) The driving system of claim 5, wherein a driving capability of the first current source is smaller than a driving capability of the second current source. ### Claim 7 (depends on 1) The driving system of claim 1 wherein when the characteristic current is outputted to the display panel, the data voltage of the display panel is switched within 100 ns-300 ns. ### Claim 8 (depends on 1) The driving system of claim 1 wherein when the regular current is outputted to the display panel, the data voltage of the display panel is switched within 40 ns-60 ns. ### Claim 9 (depends on 1) The driving system of claim 1, wherein the characteristic video signal is a video signal outputted in a transition of an Nth frame and an (N+1)th frame when a gray value difference between the Nth frame and the (N+1)th frame is greater than or equal to 32, and N is an integer greater than or equal to 1. ### Claim 10 (depends on 9) The driving system of claim 9, wherein the characteristic video signal is a video signal outputted in the transition of the Nth frame and the (N+1)th frame when the Nth frame has a gray value of 32 and the (N+1)th frame has a gray value of 64. ### Claim 11 (depends on 9) The driving system of claim 9, wherein the characteristic video signal is a video signal outputted in the transition of the Nth frame and the (N+1)th frame when the Nth frame has a gray value of 64 and the (N+1)th frame has a gray value of 128. ### Claim 12 (depends on 9) The driving system of claim 9, wherein the characteristic video signal is a video signal outputted in the transition of the Nth frame and the (N+1)th frame when the Nth frame has a gray value of 64 and the (N+1)th frame has a gray value of 255. ### Claim 13 (depends on 9) The driving system of claim 9, wherein the characteristic video signal is a video signal outputted in the transition of the Nth frame and the (N+1)th frame when the Nth frame has a gray value of 128 and the (N+1)th frame has a gray value of 255. ### Claim 14 (depends on 1) The driving system of claim 1, wherein the timing controller is further configured to determine whether the display screen switching gray value difference is greater than or equal to 32. ### Claim 15 A driving method of a display panel, the driving method comprising: receiving a V-by-one (VBO) information, analyzing the VBO information, and outputting a corresponding video signal; wherein the video signal is a characteristic video signal or a regular video signal, and a display screen switching gray value difference corresponding to the characteristic video signal is greater than a display screen switching gray value difference corresponding to the regular video signal; and receiving the video signal and processing the video signal to output a characteristic current or a regular current to the display panel; wherein the characteristic current is outputted to the display panel when the driving chip receives the characteristic video signal and the regular current is outputted to the display panel when the driving chip receives the regular video signal, and the characteristic current is smaller than regular current. ### Claim 16 (depends on 15) The driving method of claim 15, wherein the step of receiving the V-by-one VBO information, analyzing the VBO information, and outputting the corresponding video signal comprises: determining whether the display screen switching gray value difference is greater than or equal to 32; and outputting the characteristic video signal on the condition that the display screen switching gray value difference is greater than or equal to 32; and outputting the regular video signal on the condition that the display screen switching gray value difference is smaller than 32. ### Claim 17 (depends on 15) The driving method of claim 15, wherein the step of receiving the video signal and processing the video signal to output a characteristic current or a regular current to the display panel comprises: receiving the video signal, outputting a selection result according to the video signal, and processing the video signal to output a corresponding analog signal; receiving the analog signal and processing the analog signal according to the selection result to output the characteristic current or the regular current. ### Claim 18 (depends on 17) The driving method of claim 17, further comprising a following step before the step of outputting the characteristic current or the regular current: amplifying the characteristic current or the regular current. ### Claim 19 (depends on 17) The driving method of claim 17, wherein the step of receiving the video signal, outputting a selection result according to the video signal, and processing the video signal to output the corresponding analog signal comprises: receiving the characteristic video signal, outputting the characteristic current selection result according to the regular video signal, and processing the characteristic video signal to output the corresponding analog signal; or receiving the regular video signal, outputting the regular current selection result according to the characteristic video signal, and processing the regular video signal to output the corresponding analog signal.