| 摘要 |
PURPOSE:To eliminate flicker and the unevenness of shading by supplying video signals and desired DC potential selectively to picture elements during one field scanning period. CONSTITUTION:Video signals are supplied to buffer amplifiers S11, S12... through a sample holding circuit 2 at every horizontal scanning by the output from a shift register. On the other hand, desired DC potential VH is supplied to switching elements S21, S22..., and switched once in one horizontal scanning period and supplied to a source line S. Timing pulses by which video signals are supplied to the source line S are generated in gate lines G1-G130 and video signals are written in picture elements L1, L12.... On the other hand, pulses are generated immediately before pulses generated in G1-G130 in gate lines G131-G240 and DC potential VH is written successively. When writing is completed, pulses are generated from G1-G130 and DC potential VH is written in picture elements, and on the other hand, video signals are written successively in picture elements of gate lines G131-G240.
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