LEVEL SHIFTER CIRCUIT AND DISPLAY DEVICE PROVIDED THEREWITH

摘要

PROBLEM TO BE SOLVED: To provide a level shifter circuit which reduces power consumption.

SOLUTION: First and second level shifters LS1 and LS2 which respectively input two kinds of clock signals CK1 and CK2 whose high level periods do not overlap with each other are provided with control transistors N5 and N5 and control lines CL1 and CL2. Then their level shifting operations are stopped by inhibiting a feedthrough current from flowing to an offsetter part 2 and a level shift part 3 of the level shifter LS2 when an output signal OUT1 is is high level, and also inhibiting a feedthrough current from flowing into an offsetter part 2 and a level shift part 3 of the level shifter LS1 when an output signal OUT2 is high level. Consequently, the power consumption in a specified period in a non-active period of the clock signals CK1 and CK2 corresponding to an active period of the other clock signal is reduced.

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