Design of Bidirectional and Low Power Consumption Gate Driver in Amorphous Silicon Technology for TFT-LCD Application

• Published in: Journal of display technology Vol. 9; no. 2; pp. 91 - 99
• Main Authors: Zheng, Guang-Ting, Liu, Po-Tsun, Wu, Meng-Chyi, Chu, Li-Wei, Yang, Meng-Chuan
• Format: Journal Article
• Language: English
• Published: IEEE 01.02.2013
• Subjects: Amorphous silicon (a-Si); Driver circuits; gate driver; Logic gates; Low voltage; Power demand; Thin film transistors; thin-film transistor liquid crystal display (TFT-LCD)
• ISSN: 1551-319X; 1558-9323
• DOI: 10.1109/JDT.2012.2225406

A new gate driver has been designed and fabricated by amorphous silicon (a-Si) technology. With utilizing four clock signals in the design of gate driver on array (GOA), the pull-up transistor has ability for both output charging and discharging, and layout size of the proposed gate driver can be narrowed for bezel panel application. Moreover, lower duty cycle of clock signals can decrease static power loss to further reduce the overall power consumption of the proposed gate driver. The scan direction of the proposed gate driver can be adjusted by switching two direct control signals to present the reversal display of image. The proposed gate driver has been successfully demonstrated in a 4.5-inch WVGA (480 × RGB × 800) TFT-LCD panel and passed reliability tests of the supporting foundry.