| 摘要 |
PROBLEM TO BE SOLVED: To attain a display device capable of reducing power consumption caused by charging/discharging of data lines and that by a comparator circuit, and capable of reducing an offset voltage resulting from time delay of the comparator circuit. SOLUTION: The comparator 10a compares an input voltage V<SB>IN</SB>input in a current write-in cycle with a data line DL voltage (output voltage V<SB>OUT</SB>) set in the preceding write-in cycle. Then, on the basis of the result of the comparison by the comparator 10a, either a switch SW5 or a switch SW7 is turned on, and thereby either a charging circuit with a constant current source 15 or a discharging circuit with a constant current source 16 is connected to a node N12. Consequently, since the voltage written in the data lines DL in the preceding write-in cycle can be effectively utilized in the current written-in cycle, it becomes possible to reduce the power consumption caused by charging/discharging of the data lines DL. COPYRIGHT: (C)2006,JPO&NCIPI
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