1. Voltage Drop Compensation Method for Active Matrix Organic Light Emitting Diode Displays
- Author
-
Do-Hyung Ryu, Keum-Nam Kim, Byung-hee Kim, Brian H. Berkeley, Jae-Beom Choi, and Sangmoo Choi
- Subjects
Materials science ,Physics and Astronomy (miscellaneous) ,business.industry ,General Engineering ,General Physics and Astronomy ,Active matrix ,law.invention ,Compensation (engineering) ,AMOLED ,law ,OLED ,Optoelectronics ,Power network design ,business ,Voltage drop ,Electronic circuit ,Voltage - Abstract
In this paper, the conventional voltage drop compensation methods are reviewed and the novel design and driving scheme, the advanced power de-coupled (aPDC) driving method, is proposed to effectively compensate the voltage IR drop of active matrix light emitting diode (AMOLED) displays. The advanced PDC driving scheme can be applied to general AMOLED pixel circuits that have been developed with only minor modification or without requiring modification in pixel circuit. A 14-in. AMOLED panel with the aPDC driving scheme was fabricated. Long range uniformity (LRU) of the 14-in. AMOLED panel was improved from 43% without the aPDC driving scheme, to over 87% at the same brightness by using the scheme and the layout complexity of the panel with new design scheme is less than that of the panel with the conventional design scheme.
- Published
- 2011