A high-speed driver for current-programmed active-matrix OLED displays

TitleA high-speed driver for current-programmed active-matrix OLED displays
Publication TypeConference Paper
Year of Publication2005
AuthorsJafarabadiashtiani, S., P. Servati, and A. Nathan
Conference NameIEEE-NewCAS Conference, 2005. The 3rd International
Pagination247 - 250
Date Publishedjun.
Keywords100 nA, AMOLED pixel circuits, CMOS analogue integrated circuits, current conveyors, current feedback, current programmed pixel circuit, current-programmed active-matrix OLED displays, driver circuits, high-speed driver circuits, high-speed integrated circuits, high-voltage CMOS process, LED displays, organic light emitting diodes, organic light-emitting diodes, programmable circuits, second generation current conveyers, VerligA model

This paper proposes a new driving technique for improving settling time in current-programmed active-matrix organic light-emitting diode (AMOLED) pixel circuits. Here, a current feedback along with a second generation current conveyer is employed as the driver to cancel the effect of parasitic line capacitances. Circuit-level simulation using a high-voltage CMOS process for external driver and a VerligA model for amorphous silicon thin film transistors shows more than 8 times reduction in programming time of a typical current programmed pixel circuit for programming current of 100nA.


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