| 摘要 |
PROBLEM TO BE SOLVED: To provide a drain line driving circuit that can drive liquid crystal in 8-color display mode provided for lower power consumption not by newly providing a dedicated circuit, but by using an existent circuit and can adjust a gradation voltage for prevention against deterioration of the liquid crystal. SOLUTION: This drain line driving circuit is enabled to drive the liquid crystal by an output amplifying circuit in an existent operational amplifier circuit. Consequently, a driving circuit for 8-color display mode need not newly be provided and an increase in circuit scale can be suppressed. Further, one gradation voltage of a binary gradation voltage is outputted by an operational amplifier and then can be adjusted. Consequently, the liquid crystal is prevented from being applied with a DC voltage. COPYRIGHT: (C)2004,JPO&NCIPI
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