# US 2010/0164850 A1 · Liquid Display Panel Driving Method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0164850 A1 - Document ID: US20100164850A1 - Status: Published application - Kind: A1 - Application number: 12/416,318 - Filed: 2009-04-01 - Published: 2010-07-01 - Earliest claimed: 2008-12-26 - Assignees: Au Optronics Corporation - Inventors: Cheng-Chiu Pai; Deniz Yurdasen; Chun-Huai Li; Kung-Yi Chan; Chun-Hung Kuo; Huan-Hsin Li - Web page: https://patentgrep.com/patent/US20100164850A1 ## CPC - G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - G09G 3/3614: {Control of polarity reversal in general} - G09G 2300/0876: Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes - G09G 2310/0251: Precharge or discharge of pixel before applying new pixel voltage - G09G 2330/021: Power management, e.g. power saving - 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 liquid display panel driving method to drive a plurality of pixels of a liquid display panel in a frame period comprising a plurality of data input intervals is provided. Each pixel comprises first and second capacitors coupled to a first and second common electrode respectively. The liquid display panel driving method comprises the steps of: keeping the second common electrode at the same voltage level; modifying the voltage of the first common electrode of each pixel along a row of scan line to perform a first pre-charge before the data input interval; turning on the pixels to make each pixel receive the data voltage from the data lines during the data input interval; and turning off the pixels and modifying the voltage of the first common electrode to further set the voltage of each of the pixels to a target level after the data input interval. ## Claims ### Claim 1 A liquid display panel driving method to drive a plurality of pixels of a liquid display panel in a frame period, wherein each of the plurality of pixels are placed at the intersections of a plurality columns of data lines and a plurality rows of scan lines, the frame period comprises a plurality of data input intervals each corresponding to a scan line, each pixel further comprises first and second capacitors coupled to a first and second common electrode respectively, the first common electrodes of each row of pixels are independent, and the second common electrode of each pixel receives the same voltage, the liquid display panel driving method comprises the steps of: keeping the second common electrodes at the same voltage level; modifying the voltage of the first common electrode of each pixel along a row of scan line to perform a first pre-charge before the data input interval corresponding to the row of the scan line; turning on the pixels on the scan line to make each pixel receive the data voltage from the corresponding data lines during the data input interval; and turning off the pixels on the scan line and modifying the voltage of the first common electrode of each pixel to further set the voltage of each of the pixels to a target level after the data input interval. ### Claim 2 (depends on 1) The liquid display panel driving method of claim 1, wherein the voltage of each of the pixels along the scan line has opposite polarity of target levels in two neighboring frame period. ### Claim 3 (depends on 2) The liquid display panel driving method of claim 2, wherein when the target level of a frame period is a positive level, the voltage modification of the first common electrode and the data voltage received are both a positive value, when the target level of a frame period is a negative level, the voltage modification of the first common electrode and the data voltage received are both a negative value. ### Claim 4 (depends on 3) The liquid display panel driving method of claim 3, wherein when the target level of a frame period is a positive level, the voltage modification of the first common electrode after the data input interval substantially comprises two modifying steps to set the voltage of each of the pixels to the target level. ### Claim 5 (depends on 1) The liquid display panel driving method of claim 1, wherein the liquid display panel is a row inversion liquid display panel. ### Claim 6 (depends on 1) The liquid display panel driving method of claim 1, wherein each of the plurality of the data input intervals is separated from each other. ### Claim 7 (depends on 1) The liquid display panel driving method of claim 1, wherein each of the two data input intervals corresponding to two neighboring scan lines have an overlapped interval, the pixels on the latter scan line make use of the pixel voltages of the pixels of the former scan line to perform a second pre-charge during the overlapped interval. ### Claim 8 (depends on 7) The liquid display panel driving method of claim 7, wherein the pixels on the latter scan line receives the data voltage from the corresponding data lines during the data input interval after the overlapped interval. ### Claim 9 (depends on 1) The liquid display panel driving method of claim 1, wherein the order to turn on the plurality of row of pixels is the same sequential order of the arrangement of the scan lines. ### Claim 10 (depends on 1) The liquid display panel driving method of claim 1, wherein the order to turn on the plurality of rows of pixels is to turn on the odd rows of pixels first then followed by even rows of pixels.