Display device of active matrix type

Details Display device of active matrix type Display device of active matrix type

2006-09-05

2006-09-05

Wu, Xiao (Department: 2674)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S098000, C345S099000

Reexamination Certificate

active

07102606

ABSTRACT:
When a gate voltage having a rectangular-shaped pulse is supplied, the voltage of a pixel electrode is pulled down and fluctuated by a fall of the gate voltage due to a parasitic capacitor formed between a gate line and the pixel electrode, i.e. a so-called drop voltage is generated. As the drop voltage depends on a time constant of a change in the gate voltage, it can be diminished by smoothing the falling edge of the gate voltage. This is achieved by, for example, providing a current discharging transistor of a gate driver8with a small channel width to decrease the maximum current value. By utilizing such a gate voltage, a liquid crystal display device with a small drop voltage can be provided, even when the capacitance of the parasitic capacitor is great.

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