Patent ID: 8749300
Filing Date: 2014-06-10
Classification: G09G,H02M

Abstract:
1. A DC voltage conversion circuit of a liquid crystal display apparatus, comprising: a main pumping circuit including a plurality of thin film transistors and configured to output voltage for driving a liquid crystal display apparatus when the plurality of thin film transistors are alternately turned on or off; and a switch control signal generator configured to control voltages applied to gates of the plurality of thin film transistors by inversion of a clock signal, wherein each thin film transistor is turned on when positive gate-source voltage is applied thereto, and turned off when negative gate-source voltage is applied thereto, wherein the main pumping circuit includes: wherein a first clock signal is inputted to the second node, the sixth node and the eighth node, a second clock signal is inputted to the fourth node, the fifth node and the tenth node, a third clock signal is inputted to the third node, the ninth node and the eleventh node, and a fourth clock signal is inputted to the first node, the seventh node and the twelfth node.