Pulse-Width Modulation with Current Uniformization for TFT-OLEDs

Mutsumi KIMURA; Shigeki SAWAMURA; Masakazu KATO; Yuji HARA; Daisuke SUZUKI; Hiroyuki HARA; Satoshi INOUE

doi:10.1093/ietele/e90-c.11.2076

Pulse-Width Modulation with Current Uniformization for TFT-OLEDs

Mutsumi KIMURA, Shigeki SAWAMURA, Masakazu KATO, Yuji HARA, Daisuke SUZUKI, Hiroyuki HARA, Satoshi INOUE

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A novel driving concept, "pulse-width modulation with current uniformization," is proposed for thin-film transistor driven organic light-emitting diode displays (TFT-OLEDs). An example of this driving concept is the combination of "pulse-width modulation with a self-biased inverter" and a "time-ratio grayscale with current uniformization." Its driving operation is confirmed by circuit simulation. It is found that this driving method can compensate the characteristic deviations and degradations of both TFTs and OLEDs and immensely improve luminance uniformity. Finally, its driving operation is also confirmed by an actual pixel equivalent circuit.

Publication: IEICE TRANSACTIONS on Electronics Vol.E90-C No.11 pp.2076-2082

Publication Date: 2007/11/01

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Online ISSN: 1745-1353

DOI: 10.1093/ietele/e90-c.11.2076

Type of Manuscript: Special Section INVITED PAPER (Special Section on Electronic Displays)

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Mutsumi KIMURA, Shigeki SAWAMURA, Masakazu KATO, Yuji HARA, Daisuke SUZUKI, Hiroyuki HARA, Satoshi INOUE, "Pulse-Width Modulation with Current Uniformization for TFT-OLEDs" in IEICE TRANSACTIONS on Electronics, vol. E90-C, no. 11, pp. 2076-2082, November 2007, doi: 10.1093/ietele/e90-c.11.2076.
Abstract: A novel driving concept, "pulse-width modulation with current uniformization," is proposed for thin-film transistor driven organic light-emitting diode displays (TFT-OLEDs). An example of this driving concept is the combination of "pulse-width modulation with a self-biased inverter" and a "time-ratio grayscale with current uniformization." Its driving operation is confirmed by circuit simulation. It is found that this driving method can compensate the characteristic deviations and degradations of both TFTs and OLEDs and immensely improve luminance uniformity. Finally, its driving operation is also confirmed by an actual pixel equivalent circuit.
URL: https://globals.ieice.org/en_transactions/electronics/10.1093/ietele/e90-c.11.2076/_p

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@ARTICLE{e90-c_11_2076,
author={Mutsumi KIMURA, Shigeki SAWAMURA, Masakazu KATO, Yuji HARA, Daisuke SUZUKI, Hiroyuki HARA, Satoshi INOUE, },
journal={IEICE TRANSACTIONS on Electronics},
title={Pulse-Width Modulation with Current Uniformization for TFT-OLEDs},
year={2007},
volume={E90-C},
number={11},
pages={2076-2082},
abstract={A novel driving concept, "pulse-width modulation with current uniformization," is proposed for thin-film transistor driven organic light-emitting diode displays (TFT-OLEDs). An example of this driving concept is the combination of "pulse-width modulation with a self-biased inverter" and a "time-ratio grayscale with current uniformization." Its driving operation is confirmed by circuit simulation. It is found that this driving method can compensate the characteristic deviations and degradations of both TFTs and OLEDs and immensely improve luminance uniformity. Finally, its driving operation is also confirmed by an actual pixel equivalent circuit.},
keywords={},
doi={10.1093/ietele/e90-c.11.2076},
ISSN={1745-1353},
month={November},}

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TY - JOUR
TI - Pulse-Width Modulation with Current Uniformization for TFT-OLEDs
T2 - IEICE TRANSACTIONS on Electronics
SP - 2076
EP - 2082
AU - Mutsumi KIMURA
AU - Shigeki SAWAMURA
AU - Masakazu KATO
AU - Yuji HARA
AU - Daisuke SUZUKI
AU - Hiroyuki HARA
AU - Satoshi INOUE
PY - 2007
DO - 10.1093/ietele/e90-c.11.2076
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E90-C
IS - 11
JA - IEICE TRANSACTIONS on Electronics
Y1 - November 2007
AB - A novel driving concept, "pulse-width modulation with current uniformization," is proposed for thin-film transistor driven organic light-emitting diode displays (TFT-OLEDs). An example of this driving concept is the combination of "pulse-width modulation with a self-biased inverter" and a "time-ratio grayscale with current uniformization." Its driving operation is confirmed by circuit simulation. It is found that this driving method can compensate the characteristic deviations and degradations of both TFTs and OLEDs and immensely improve luminance uniformity. Finally, its driving operation is also confirmed by an actual pixel equivalent circuit.
ER -