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New Current Programmed Pixel Circuit for Active-Matrix Organic Light-Emitting-Diode Displays

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5 Author(s)
F. H. Wang ; Department of Electrical Engineering and Graduate Institute of Optoelectronic Engineering, National Chung Using University 250, Kuo Kuang Rd., Taichung 402, Taiwan, R.O.C., E-mail: ; H. C. Lin ; P. S. Shih ; L. Y. Lin
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A new current programmed pixel circuit for active-matrix organic light-emitting-diode displays (AMOLED) was developed by using low temperature polycrystalline silicon (LTPS) technology. The new pixel circuit adopted not only asymmetric current mirror to reduce pixel charging time but two storage capacitors to increase OLED current holding ratio. The proposed current programmed pixel circuit kept high aperture ratio of the pixel and accurate OLED current despite parasitic resistance of power lines. Therefore, this pixel circuit is suitable for large size and high resolution AMOLED displays.

Published in:

Electron Devices and Solid-State Circuits, 2007. EDSSC 2007. IEEE Conference on

Date of Conference:

20-22 Dec. 2007