Patent ID: 7109966
Filing Date: 2006-09-19
Classification: G09G,H03K

Abstract:
1. A display element drive circuit comprising an output stage including a CMOS circuit for driving a line to which a plurality of display elements are connected, wherein said CMOS circuit comprises a first P channel transistor and a second N channel transistor and a drive circuit for driving said first and second transistors, said drive circuit comprising a time constant circuit having a first time constant utilizing a first gate input capacitance of said first transistor and a second time constant utilizing a second gate input capacitance of said second transistor, one of the first and second time constants being selected such that, when said drive circuit receives a predetermined logic signal, one of said first and second transistors is turned ON after the other transistor is turned OFF, wherein when said drive circuit, receives the predetermined logic signal, turns said first transistor ON after said second transistor is turned OFF, the first time constant is larger than the second time constant, the predetermined logic signal is either a High level or a Low level and said time constant circuit includes a first resistor coupled with said first gate input capacitance for determining the first time constant and a second resistor coupled with said second gate input capacitance for determining the second time constant.