Improved a-Si:H TFT pixel electrode circuits for active-matrix organic light emitting displays

Yi He; Reiji Hattori; Jerzy Kanicki

doi:10.1109/16.930646

Improved a-Si:H TFT pixel electrode circuits for active-matrix organic light emitting displays

Yi He, Reiji Hattori, Jerzy Kanicki

Advanced Project Division

Research output: Contribution to journal › Article › peer-review

102 Citations (Scopus)

Abstract

Two improved four thin-film-transistors (TFTs) pixel electrode circuits based on hydrogenated amorphous silicon (a-Si:H) technology have been designed. Both circuits can provide a constant output current level and can be automatically adjusted for TFT threshold voltage variations. The circuit simulation results indicate that an excellent linearity between the output current and input current can be established. An output current level higher than ∼ 5 μA can be achieved with these circuits. This current level can provide a pixel electrode brightness higher than 1,000 cd/m ² with the organic light-emitting device (OLED) having an external quantum efficiency of 1%. These pixel electrode circuits can potentially be used for the active-matrix organic light-emitting displays (AM-OLEDs).

Original language	English
Pages (from-to)	1322-1325
Number of pages	4
Journal	IEEE Transactions on Electron Devices
Volume	48
Issue number	7
DOIs	https://doi.org/10.1109/16.930646
Publication status	Published - Jul 2001

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/16.930646

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title = "Improved a-Si:H TFT pixel electrode circuits for active-matrix organic light emitting displays",

abstract = "Two improved four thin-film-transistors (TFTs) pixel electrode circuits based on hydrogenated amorphous silicon (a-Si:H) technology have been designed. Both circuits can provide a constant output current level and can be automatically adjusted for TFT threshold voltage variations. The circuit simulation results indicate that an excellent linearity between the output current and input current can be established. An output current level higher than ∼ 5 μA can be achieved with these circuits. This current level can provide a pixel electrode brightness higher than 1,000 cd/m 2 with the organic light-emitting device (OLED) having an external quantum efficiency of 1%. These pixel electrode circuits can potentially be used for the active-matrix organic light-emitting displays (AM-OLEDs).",

author = "Yi He and Reiji Hattori and Jerzy Kanicki",

note = "Funding Information: Manuscript received June 28, 2000; revised February 9, 2001. This work was supported in part by the Center for Display Technology and Manufacturing, University of Michigan, and an NIH Grant. The review of this paper was arranged by Editor J. Hynecek.",

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Improved a-Si:H TFT pixel electrode circuits for active-matrix organic light emitting displays

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