Birch, Stewart, Kolasch & Birch, LLP
High-reliability shift register circuit
The main circuit of each stage of the high-reliability shift register circuit is composed of transistors, and the turn-on time for the four transistors are only 1˜2 pulse time within one frame time. Transistors construct an inverter circuit which continuously offers a high-level supply voltage that controls activities of transistors so as to continuously offer a low-level supply voltage to the first node and the output terminal such that avoids the first node and the output terminal being in a floating state. Besides, one of the transistor acts as a charging circuit that extends the lifetime of another transistor. This circuit avoids the affection on the behavior of the shift register circuit that is caused by an a-Si (amorphous silicon) TFT under a sustained stress.
Wintek Corporation
G
G11C
inventional
Wen-Tui Wen-Chun Ja-Fu
Liao Wang Tsai