Patent ID: 8063875
Filing Date: 2011-11-22
Classification: G09G,H04N

Abstract:
1. A method for driving an electrooptic device having pixels disposed in correspondence with the intersections of a plurality of rows of scanning lines and a plurality of data lines, each pixel producing a gray level corresponding to a data signal applied to a corresponding data line when a selecting voltage is applied to a corresponding scanning line, and a scanning-line driving circuit including a shift register and a logic circuit corresponding to each output stage of the shift register, the method comprising: assigning four rows of the scanning lines that are separated from each other by a predetermined number of rows of the scanning lines, to a first precharge period, a first writing period, a second precharge period, and a second writing period, respectively; sequentially assigning rows in subsequent sets of four rows to the first precharge period, the first writing period, the second precharge period, and the second writing period, respectively, the rows in each subsequent set of four rows being shifted one row each from rows of a preceding set of four rows, the rows assigned to a same one of the first precharge period, the first writing period, the second precharge period, and the second writing period forming a row group; during the first precharge period, applying the selecting voltage to an assigned scanning line and providing a first data signal to the data lines, the first precharge data signal having a precharge voltage that makes the pixel black and having a polarity that is one of higher and lower than a predetermined reference voltage; during the first writing period, applying the selecting voltage to an assigned scanning line and providing a first writing data signal to the data lines, the first writing data signal having a voltage corresponding to the gray level of the pixel and having a polarity that is one of higher and lower than the predetermined reference voltage; during the second precharge period, applying the selecting voltage to an assigned scanning line and providing a second precharge data signal to the data lines, the second precharge data signal having a precharge voltage that makes the pixel black and having a polarity that is the other of higher and lower than the predetermined reference voltage; during the second writing period, applying the selecting voltage to an assigned scanning line and providing a second writing data signal to the data lines, the second writing data signal having a voltage corresponding to the gray level of the pixel and having a polarity that is the other of higher and lower than the predetermined reference voltage; and inputting into each logic circuit corresponding to eight adjacent rows of the scanning lines an output signal from the output stage of the shift register and one of first to fourth enable signals, wherein: