LIQUID CRYSTAL DEVICE, CONTROL CIRCUIT THEREFOR, AND ELECTRONIC APPARATUS

摘要

PROBLEM TO BE SOLVED: To prevent application of a DC component on a liquid crystal in a regional scanning driving system. SOLUTION: A counter 53 counts pulses of horizontal synchronizing signal Hsync and outputs a maximum value CLc among the counted values. A discrimination circuit 59 compares the maximum value CLc from the counter 53 with a value PLc read out from a register 57 to discriminate whether or not the maximum value Clc is greater than the value PLc, and outputs discrimination signal F representing the result. An addition/subtraction circuit 55 adds '+2' or '-2' to the value PLc stored in the register 57 in accordance with the discrimination signal F and resets the register 57. A scanning control circuit 51 defines the start timing of a second field earlier than the prescribed timing or delayed according to the value PLc. COPYRIGHT: (C)2008,JPO&INPIT