Voltage driving scheme using three TFTs and one capacitor for active-matrix organic light-emitting diode pixel circuits

Chih-Lung Lin, Chia Che Hung, Wen Yen Chang, Mao Hsun Cheng, Pin Yen Kuo, Yu Cheng Chen

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

This work presents a new active-matrix organic light-emitting diode (AMOLED) pixel circuit with a novel driving scheme that is based on low erature polycrystalline-silicon thin film transistors (LTPS TFTs). The proposed circuit that consists of one driving TFT and two switching TFTs, which are all p-type, can successfully compensate for not only variations in the TFT threshold voltage but also the current-resistance (IR) voltage drop in the power line. The functionality of the pixel circuit for the array structure and the uniformity of organic light-emitting diode (OLED) current are verified using H-Simulation Program with Integrated Circuit Emphasis (HSPICE). According to the results of a simulation, over the entire range of tested data voltages (-4.5 to-2.5 V), the relative errors of the OLED current of the proposed circuit are below 1.2% when the driving TFT threshold voltage varies from-0.5 to + 0.5 V.

Original languageEnglish
Article number6295685
Pages (from-to)602-608
Number of pages7
JournalIEEE/OSA Journal of Display Technology
Volume8
Issue number10
DOIs
Publication statusPublished - 2012 Sep 10

Fingerprint

Organic light emitting diodes (OLED)
capacitors
Capacitors
light emitting diodes
Pixels
pixels
Networks (circuits)
Electric potential
electric potential
matrices
Threshold voltage
threshold voltage
power lines
Thin film transistors
Polysilicon
integrated circuits
Integrated circuits
transistors
simulation
silicon

All Science Journal Classification (ASJC) codes

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

Cite this

Lin, Chih-Lung ; Hung, Chia Che ; Chang, Wen Yen ; Cheng, Mao Hsun ; Kuo, Pin Yen ; Chen, Yu Cheng. / Voltage driving scheme using three TFTs and one capacitor for active-matrix organic light-emitting diode pixel circuits. In: IEEE/OSA Journal of Display Technology. 2012 ; Vol. 8, No. 10. pp. 602-608.
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Voltage driving scheme using three TFTs and one capacitor for active-matrix organic light-emitting diode pixel circuits. / Lin, Chih-Lung; Hung, Chia Che; Chang, Wen Yen; Cheng, Mao Hsun; Kuo, Pin Yen; Chen, Yu Cheng.

In: IEEE/OSA Journal of Display Technology, Vol. 8, No. 10, 6295685, 10.09.2012, p. 602-608.

Research output: Contribution to journalArticle

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