Patent ID: 7696989
Filing Date: 2010-04-13
Classification: G09G

Abstract:
1. A flat display apparatus in which a display unit formed by arranging pixels in a matrix and a drive circuit driving the display unit are formed integrally on a substrate, characterized in that: the drive circuit has a first circuit block operating by a first power supply voltage and a second circuit block operating by a second power supply voltage, which is lower than the first power supply voltage, for processing a processing result by the first circuit block; the second circuit block receives an input of the processing result of the first circuit block at an active element performing on-off operation complementarily; and the first circuit block has a level setting circuit for setting a level of the processing result so as to hold an output of the active element at a predetermined level by a fall of the first power supply voltage, the first circuit block has a first inverter operating by the first power supply voltage, a second inverter for outputting the processing result based on the output of the first inverter to the second circuit block, and a power supply switching circuit for switching a power supply voltage of the second inverter from the first power supply voltage to the second power supply voltage by a fall of the first power supply; and the level setting circuit holds the output of the active element at a predetermined level by setting of an input level of the second inverter.