Level shift circuit and shift register and display device

Details Level shift circuit and shift register and display device Level shift circuit and shift register and display device

2006-03-02

2010-02-16

Nguyen, Chanh (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C377S064000

Reexamination Certificate

active

07663593

ABSTRACT:
A level shift circuit, a shift register, and a display device in which circuit operation is resistant to influence of variations in characteristics of elements such as transistors. The level shift circuit, includes a first switch turning on or off in accordance with a voltage of a first node, switching ON and OFF when the voltage is a first threshold value, and outputting a first voltage when ON state; a second switch turning on or off in accordance with the voltage of a second node, switching ON and OFF when the voltage is a second threshold value, and outputting a second voltage when ON state; a first capacitor receiving a first input signal at one terminal and connected at the other terminal to the first node; a second capacitor receiving a second input signal at one terminal, and connected at the other terminal to the second node; and a circuit for setting the voltage of the first node at the first threshold value and setting the voltage of the second node at the second threshold value in a predetermined period and setting the first node and the second node in a floating state after the predetermined period.

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