| 摘要 |
PROBLEM TO BE SOLVED: To obtain a circuit for adjusting a sampling phase of a color liquid crystal display device capable of surely improving, without a decrease in a yield, deterioration in resolution of x groups of three primary color pixel signals caused by variation of signal delays in various circuits in a color liquid crystal display device of a system for simultaneously writing x groups (x=1, 2, 3,...) of three primary color pixel signals. SOLUTION: A phase change-over means 20 changes over the phase of the sampling hold pulse by the predetermined phase obtained by dividing a half of the horizontal period by an even number, a detection means 19 detects a sampling hold pulse for minimizing the absolute value of a difference between a pair of sampling voltages from a calculation means 28 and the phase of the sampling hold pulse is set to the phase obtained by shifting the phase of the sampling hold pulse detected by the detection means 19 by a quarter of the horizontal period. COPYRIGHT: (C)2003,JPO
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