| 摘要 |
PROBLEM TO BE SOLVED: To provide a latch circuit capable of suppressing a current flowing in a power supply, and capable of reducing the area, and a liquid crystal display device mounting the latch circuit. SOLUTION: In this latch circuit having a CMOS latch cell 10 as a basic configuration and a level shift function, two switches 20, 21 for selecting a VSS1 power supply and a VSS2 power supply are installed on the negative power supply side of the CMOS latch cell 10, and switching control of the switches 20, 21 are executed corresponding to each period of a latch operation and an output operation of the CMOS latch cell 10, and the circuit is operated by the VSS1 power supply during the period of the latch operation and operated by the VSS2 power supply during the period of the output operation. |
