P-174: Pulse Width Modulation IGZO Gate on Array Structure for OLED Driving

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• 作者：Quanhu Li ; Hongjun Xie ; Chen Song ; Kun Cao ; Baoxia Zhang ; Song Meng ; Yu Wang ; Longyan Wang ; Yicheng Lin ; Cuili Gai ; Ling Wang ; Yongqian Li and Zhongyuan Wu
• 刊名：SID Symposium Digest of Technical Papers
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：47
• 期：1
• 页码：1771-1774
• 全文大小：834K
• ISSN：2168-0159

文摘

A novel gate driver on array (GOA) circuit topology based on pulse width modulation (PWM) technique has been proposed for internal compensation AMOLED pixel driving. The output width of PWM GOA basic unit can be easily adjusted by tuning start pulse (STU) signal width. The performance of this circuit has been verified by simulation and the prototype has been fabricated in 5 inch AMOLED panel with IGZO TFT process. There are three main features of PWM GOA circuit, (1) PWM GOA is properly designed with depletion mode IGZO TFTs (2) Output pulse width can be easily changed by tuning STU's width without additional circuits (3) Interface and accessory of PWM GOA is custom designed to realize different function of each block. This GOA structure provides a practical way to realize narrow bezel design.