LIQUID CRYSTAL DRIVE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a liquid crystal drive device that absorbs manufacturing variations and secular changes of a driver circuit by adjusting a drive pulse signal according to changes in a reference voltage level of a drive power source to realize stable liquid crystal drive.

SOLUTION: A liquid crystal drive device includes a driver IC 20 that drives a liquid crystal panel 30 by a signal from a microcomputer 10. The driver IC 20 includes a voltage generation circuit 23 for generating a reference voltage Vk, a SEG drive circuit 25 and a COM drive circuit 26 that supply a drive pulse signal to the liquid crystal panel 30, and a voltage LUT 22 that varies the width of the drive pulse signal. The microcomputer 10 outputs an adjustment signal P2 based on the reference voltage Vk from the driver IC 20. The voltage LUT 22 of the driver IC 20 varies the pulse width of the drive pulse signal according to the adjustment signal P2.

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