Novel Pixel Circuit With Compensation for Normally-Off/On a-IGZO TFTs and OLED Luminance Degradation

Chih Lung Lin; Po Syun Chen; Po Chun Lai; Ting Ching Chu; Ming Xun Wang; Chia Lun Lee

doi:10.1109/JDT.2016.2615658

Novel Pixel Circuit With Compensation for Normally-Off/On a-IGZO TFTs and OLED Luminance Degradation

Chih Lung Lin, Po Syun Chen, Po Chun Lai, Ting Ching Chu, Ming Xun Wang, Chia Lun Lee

Department of Electrical Engineering

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

16 Citations (Scopus)

Abstract

This letter presents a new pixel circuit reaching simultaneous compensation for a threshold voltage (V_TH) shift of normally-off and normally-on a-IGZO TFTs, as well as luminance drop of an OLED device for ultrahigh-definition active-matrix organic light-emitting diode displays. Simulation results demonstrate the successful detection of a 1 V shift of threshold voltage despite normally-off and normally-on characteristics by the novel source-follower structure. Furthermore, the interdependence between luminance and threshold voltage shift of the OLED device is measured. Based on the simulations using the measured interdependence, the luminance drop caused by OLED aging is suppressed below 5% at different data voltages.

Original language	English
Article number	7585085
Pages (from-to)	1664-1667
Number of pages	4
Journal	Journal of Display Technology
Volume	12
Issue number	12
DOIs	https://doi.org/10.1109/JDT.2016.2615658
Publication status	Published - 2016 Dec

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "Novel Pixel Circuit With Compensation for Normally-Off/On a-IGZO TFTs and OLED Luminance Degradation",

abstract = "This letter presents a new pixel circuit reaching simultaneous compensation for a threshold voltage (VTH) shift of normally-off and normally-on a-IGZO TFTs, as well as luminance drop of an OLED device for ultrahigh-definition active-matrix organic light-emitting diode displays. Simulation results demonstrate the successful detection of a 1 V shift of threshold voltage despite normally-off and normally-on characteristics by the novel source-follower structure. Furthermore, the interdependence between luminance and threshold voltage shift of the OLED device is measured. Based on the simulations using the measured interdependence, the luminance drop caused by OLED aging is suppressed below 5% at different data voltages.",

author = "Lin, {Chih Lung} and Chen, {Po Syun} and Lai, {Po Chun} and Chu, {Ting Ching} and Wang, {Ming Xun} and Lee, {Chia Lun}",

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T1 - Novel Pixel Circuit With Compensation for Normally-Off/On a-IGZO TFTs and OLED Luminance Degradation

AU - Lin, Chih Lung

AU - Chen, Po Syun

AU - Lai, Po Chun

AU - Chu, Ting Ching

AU - Wang, Ming Xun

AU - Lee, Chia Lun

PY - 2016/12

Y1 - 2016/12

N2 - This letter presents a new pixel circuit reaching simultaneous compensation for a threshold voltage (VTH) shift of normally-off and normally-on a-IGZO TFTs, as well as luminance drop of an OLED device for ultrahigh-definition active-matrix organic light-emitting diode displays. Simulation results demonstrate the successful detection of a 1 V shift of threshold voltage despite normally-off and normally-on characteristics by the novel source-follower structure. Furthermore, the interdependence between luminance and threshold voltage shift of the OLED device is measured. Based on the simulations using the measured interdependence, the luminance drop caused by OLED aging is suppressed below 5% at different data voltages.

AB - This letter presents a new pixel circuit reaching simultaneous compensation for a threshold voltage (VTH) shift of normally-off and normally-on a-IGZO TFTs, as well as luminance drop of an OLED device for ultrahigh-definition active-matrix organic light-emitting diode displays. Simulation results demonstrate the successful detection of a 1 V shift of threshold voltage despite normally-off and normally-on characteristics by the novel source-follower structure. Furthermore, the interdependence between luminance and threshold voltage shift of the OLED device is measured. Based on the simulations using the measured interdependence, the luminance drop caused by OLED aging is suppressed below 5% at different data voltages.

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Novel Pixel Circuit With Compensation for Normally-Off/On a-IGZO TFTs and OLED Luminance Degradation

Abstract

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