Level shift circuit and display device having the same

Details Level shift circuit and display device having the same Level shift circuit and display device having the same

2007-06-05

2009-06-09

Tan, Vibol (Department: 2819)

Electronic digital logic circuitry

Interface

Supply voltage level shifting

C326S068000, C326S083000, C327S333000, C345S100000, C345S211000, C345S204000

Reexamination Certificate

active

07545174

ABSTRACT:
A liquid crystal display (“LCD”) includes a first voltage shift circuit at a front stage of an inverter circuit. The first voltage shift circuit includes a second transistor having a source serving as an input, and a gate and drain connected to each other, and is operated as a diode, and a first transistor having a source connected to a power supply, a gate connected to a ground, and a drain connected to the drain of the second transistor. An input signal shifts voltage by a threshold of the second transistor, and then is input into the inverter circuit. Further, a first condenser is inserted between an input node and the gate of the second transistor. Therefore, the LCD has a level shift circuit with a small circuit area and a rapid response speed.

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patent: 2005277671 (2005-10-01), None

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