標題: An external compensation method for AMOLED using the concept of ramp-stop
作者: Tai, Ya-Hsiang
Lin, Chi-Hao
電機學院
光電工程學系
College of Electrical and Computer Engineering
Department of Photonics
關鍵字: AMOLED driving circuit;external compensation
公開日期: 1-Nov-2017
摘要: In this paper, we propose an external feedback method to compensate the device variation for active-matrix organic light-emitting diode. The pixel data current is controlled by ramping the gate voltage and converted to the sensed voltage V-sense in real time. When V-sense is equal to a preset voltage V-data, the switching block outputs the low potential to stop the ramping. Therefore, the gate voltage is locked at the value corresponding to the target data current. This circuit is implemented with three thin-film transistors in the active area and some functional blocks in driver integrated circuit (IC), namely, sentinel block, current-voltage converting block, and switching block. Unlike the other usual methods of external compensation requiring double number of connections between driver IC and glass, by using the common ramping signal and a simple circuit made on glass, the proposed method can be implemented with only one pin per column.
URI: http://dx.doi.org/10.1002/jsid.616
http://hdl.handle.net/11536/144424
ISSN: 1071-0922
DOI: 10.1002/jsid.616
期刊: JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY
Volume: 25
起始頁: 672
結束頁: 675
Appears in Collections:Articles