Driving method of liquid crystal display device

Abstract

Abstract PURPOSE:To maintain the good image quality uniform over the entire image plane by impressing scanning pulse voltages to the 1st electrode group except before and after the time when polarities are alternated at every specified period and impressing information pulse voltages to the 2nd electrode group. CONSTITUTION:The driving voltage is impressed to the 1st electrode X1 upon lapse of the specified period DELTAt from the time T1 when the driving signal converted to AC falls. The driving voltages are successively impressed to X2-Xm-1 so that the driving signal converted to AC rises at the time T2 when the specified period DELTAt after the impression of the voltage to the 1st electrode Dm elapses. The synthesized waveform of the waveforms shown in the figures (b)-(d) is in acutuality impressed to the electrodes and since the voltages are affected by connecting means and high-pass filters, etc., the differences in the effective values are not admitted in the driving voltages to be impressed to the 1st electrodes X1-Xm and all the driving voltages of the 1st electrodes are equal. The image quality in the center line part is thus made identical with the image quality in the other regions even with the liquid crystal display device constituted contiguously with the 1st electrode Xm and the 1st electrode X1 by bisecting the image plane. The good image quality uniform over the entire part of one image plane is thereby obtd.

Inventors

• 👤 Hiroyuki Sakayori
• 👤 坂寄　寛幸

Bibliographic Details