Patent ID: 6873312

Claim:
A liquid crystal display apparatus comprising: a liquid crystal layer; a plurality of scanning lines, the plurality of scanning lines being driven by a scanning driver having a first shift register and a first level shifter; a plurality of signal lines, the plurality of signal lines being driven by a data driver having a second shift register, a second level shifter and a D/A converter; pixels disposed correspondingly to the intersections of said scanning lines and said signal lines; and transistors for the pixels, the first shift register being connected to a common power source, and the second shift register being also connected to the common power source, signals having voltages between voltages of the common power source being used as logic signals, voltages of control signals for the D/A converter being increased by the second level shifter prior to D/A conversion, the second shift register in said data driver and the first shift register in said scanning driver connected to the common power source and logic signal inputs for the signal lines being powered by the common power source, and the voltage of said common power source being lower than the voltage of a power source for said D/A converter.