METHOD OF AC-DRIVING LIQUID CRYSTAL DISPLAY, AND THE SAME USING THE METHOD,申请号JP1994000987-传众专利搜索

METHOD OF AC-DRIVING LIQUID CRYSTAL DISPLAY, AND THE SAME USING THE METHOD

申请公布号：WO1995000944(P1)

申请号：JP1994000987

申请日期：1994.06.21

申请公布日期：1995.01.05

摘要：<p>First and second source bias voltages (VS+, VS-) are generated alternately every frame period. The polarity of a gradation level signal (Va) given to each picture element on a selected gate bus is inverted every frame period, the resultant signal is added to the source bias voltages. VS+, and VS-, and the obtained source voltages (VS) are outputted to the respective source buses. A gate voltage (VG) given to each gate bus comprises a period of a high-level gate pulse which causes a thin film transistor to conduct during the time nearly equal to the horizontal scanning interval (H) in each frame period, a gate bias period which precedes continuously the rise of the high-level gate pulse and in which the gate voltage (VG) takes first and second gate bias voltages (Vx1, Vx2) alternately every frame period, and a low-level period other than the above two periods. The high-level gate pulses given to the respective gate buses are shifted in time by the horizontal scanning interval (H) from each other in succession. The gate bias period in the i-th row has the time width from the rise of the high-level gate pulse of the i-th row to a time point after the fall of the preceding high-level gate pulse in the (i-1)-th row. Thereby, the first and second gate bias voltage (Vx1, Vx2), which are given in the i-th row, are applied alternately to the picture elements in the (i-1)-th row, correspondingly to each negative or positive write period in alternating current drive, and flickers generated in the liquid crystal display are reduced.</p>