| 摘要 |
PURPOSE:To perform a display of high quality by composing of one group of pulse voltages of an inverted pulse group higher than a threshold value and the other group of an uninverted pulse group lower than the threshold value, and making final pulses in the groups opposite in polarity in one selection period of scanning electrodes. CONSTITUTION:Four pulse voltages are applied to picture elements in one selection period of scanning electrodes, and the 1st and the 2nd pulses and the 3rd and the 4th pulses equal in pulse width and equal in absolute voltage value, but opposite in polarity and the 1st and the 3rd pulses have the opposite polarities and one of the two groups is higher than the threshold voltage although the other is lower than the threshold value. Then, picture elements in one line are placed in a desired light transmission state in one selection period while requirements of complete AC waveform are met. Consequently, a large-area liquid crystal panel is driven on a high time-division basis and a display of high quality is made. |
