Patent ID: 8004485

Claim:
A liquid crystal display, comprising: a plurality of parallel data lines; a plurality of parallel scan lines being perpendicular and intersecting to the plurality of parallel data lines, wherein the plurality of scan lines and the plurality of data lines form a plurality of pixels, and each pixel comprises a thin film transistor; a data line driving circuit for providing pixel display data through the plurality of data lines; a scan line driving circuit, having a power voltage and a basis voltage, for controlling the plurality of thin film transistors according to a scan line timing signal; and a gate signal modulation circuit, comprising: a constant current generator for generating a constant current; a first capacitor coupled to the constant current generator; a voltage generation circuit for discharging a charging voltage of the first capacitor to synchronize with the scan line timing signal and generating a control voltage; a second capacitor coupled to the power voltage; and a discharging circuit adapted to stop supplying the power voltage to the second capacitor according to a result of comparing the control voltage with the basis voltage, and to discharge the second capacitor to modulate a falling edge waveform of the scan line timing signal being outputted to the scan line driving circuit.