Driving method of matrix type liquid-crystal display unit
专利汇可以提供Driving method of matrix type liquid-crystal display unit专利检索，专利查询，专利分析的服务。并且PURPOSE: To obtain an excellent contrast unit with liquid crystal long in life, by applying a voltage, which has positive and negative pulse-zero voltage periods, to a source line and by separately applying a common voltage corresponding to scanning lines of a gate line.
CONSTITUTION: At intersections between several source lines 1 and several gate lines 2, thin-film transistors TFT3 are formed and liquid-crystal bodies 4 are held between striped common electrode 31 and TFTs 3, thereby obtaining a unit using bodies 4 as picture elements. In this unit, when picture element (ij) at the intersection between source line (i) and gate line (j) generates voltage VLC
ij by source voltage VS
i and gate voltage VG
j in case of an odd frame and write operation is performed and in case of an even frame, no write operation is done since VS
i is zero, but voltage VC
j equal in waveform and level to VLC
ij is applied reversely from common electrode 31. To cover positive and negative asymmetrical characteristics of the TFT, positive and negative pulse widths of voltage SS
i are varied and when the TFT is OFF, positive and negative discharge voltages are made zero; and then, AC driving operation containing no DC component is made possible only in one direction with characteristics excellent.
COPYRIGHT: (C)1979,JPO&Japio，下面是Driving method of matrix type liquid-crystal display unit专利的具体信息内容。
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