New pixel circuit to improve current uniformity for high-resolution AMOLED displays

Chih-Lung Lin, Po Chun Lai, Ming Yang Deng

Research output: Contribution to journalConference article

Abstract

This work presents a new pixel circuit based on low temperature polysilicon thin-film transistor (LTPS-TFT) for active-matrix organic light-emitting diode (AMOLED) displays. This circuit compensates for variations of threshold voltage (VTH) and mobility of TFTs and utilizes the parallel addressing scheme to extend the compensation time for ensuring the feasibility of application for high resolution displays. Based on the simulation results, the relative current error rates of proposed driving scheme are all lower than 2.1% for 0.5V VTH variations of TFTs and are all lower than 2.5% for 30% mobility variations of TFTs, showing effective compensation for variations of threshold voltage and mobility of TFTs.

Original languageEnglish
Pages (from-to)1297-1300
Number of pages4
JournalDigest of Technical Papers - SID International Symposium
Volume46
Issue numberBook 3
Publication statusPublished - 2015 Jun 1
Event2015 SID International Symposium - San Jose, United States
Duration: 2015 Jun 4 → …

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Organic light emitting diodes (OLED)
Threshold voltage
Pixels
Display devices
Networks (circuits)
Thin film transistors
Polysilicon
Temperature
Compensation and Redress

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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title = "New pixel circuit to improve current uniformity for high-resolution AMOLED displays",
abstract = "This work presents a new pixel circuit based on low temperature polysilicon thin-film transistor (LTPS-TFT) for active-matrix organic light-emitting diode (AMOLED) displays. This circuit compensates for variations of threshold voltage (VTH) and mobility of TFTs and utilizes the parallel addressing scheme to extend the compensation time for ensuring the feasibility of application for high resolution displays. Based on the simulation results, the relative current error rates of proposed driving scheme are all lower than 2.1{\%} for 0.5V VTH variations of TFTs and are all lower than 2.5{\%} for 30{\%} mobility variations of TFTs, showing effective compensation for variations of threshold voltage and mobility of TFTs.",
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New pixel circuit to improve current uniformity for high-resolution AMOLED displays. / Lin, Chih-Lung; Lai, Po Chun; Deng, Ming Yang.

In: Digest of Technical Papers - SID International Symposium, Vol. 46, No. Book 3, 01.06.2015, p. 1297-1300.

Research output: Contribution to journalConference article

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AU - Lai, Po Chun

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N2 - This work presents a new pixel circuit based on low temperature polysilicon thin-film transistor (LTPS-TFT) for active-matrix organic light-emitting diode (AMOLED) displays. This circuit compensates for variations of threshold voltage (VTH) and mobility of TFTs and utilizes the parallel addressing scheme to extend the compensation time for ensuring the feasibility of application for high resolution displays. Based on the simulation results, the relative current error rates of proposed driving scheme are all lower than 2.1% for 0.5V VTH variations of TFTs and are all lower than 2.5% for 30% mobility variations of TFTs, showing effective compensation for variations of threshold voltage and mobility of TFTs.

AB - This work presents a new pixel circuit based on low temperature polysilicon thin-film transistor (LTPS-TFT) for active-matrix organic light-emitting diode (AMOLED) displays. This circuit compensates for variations of threshold voltage (VTH) and mobility of TFTs and utilizes the parallel addressing scheme to extend the compensation time for ensuring the feasibility of application for high resolution displays. Based on the simulation results, the relative current error rates of proposed driving scheme are all lower than 2.1% for 0.5V VTH variations of TFTs and are all lower than 2.5% for 30% mobility variations of TFTs, showing effective compensation for variations of threshold voltage and mobility of TFTs.

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