An advanced external compensation system for active matrix organic light-emitting diode displays with poly-Si thin-film transistor backplane

Hai Jung In, Kyong Hwan Oh, Inhwan Lee, Do Hyung Ryu, Sang Moo Choi, Keum Nam Kim, Hye Dong Kim, Oh-Kyong Kwon

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

An advanced method for externally compensating the nonuniform electrical characteristics of polycrystalline silicon thin-film transistors (TFTs) and the degradation of organic light-emitting diode (OLED) devices is proposed, and the method is verified using a 14.1-in active matrix OLED (AMOLED) panel. The proposed method provides an effective solution for high-image-quality AMOLED displays by removing IR-drop and temperature effects during the sensing and displaying operations of the external compensation method. Experimental results show that the electrical characteristics of TFTs and OLEDs are successfully sensed, and that the stained image pattern due to the nonuniform luminance error and the differential aging of the OLED is removed. The luminance error range without compensation is from -6.1% to 9.0%, but it is from -1.1% to 1.2% using the external compensation at the luminance level of 120 cd/m2 in a 14.1-inch AMOLED panel.

Original languageEnglish
Article number5580066
Pages (from-to)3012-3019
Number of pages8
JournalIEEE Transactions on Electron Devices
Volume57
Issue number11
DOIs
StatePublished - 2010 Nov 1

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Organic light emitting diodes (OLED)
Thin film transistors
Polysilicon
Display devices
Luminance
Thermal effects
Image quality
Compensation and Redress
Aging of materials
Degradation

Keywords

  • Compensation
  • flat-panel displays
  • light-emitting diode (LED) displays
  • thin-film transistors (TFTs)

Cite this

In, Hai Jung ; Oh, Kyong Hwan ; Lee, Inhwan ; Ryu, Do Hyung ; Choi, Sang Moo ; Kim, Keum Nam ; Kim, Hye Dong ; Kwon, Oh-Kyong. / An advanced external compensation system for active matrix organic light-emitting diode displays with poly-Si thin-film transistor backplane. In: IEEE Transactions on Electron Devices. 2010 ; Vol. 57, No. 11. pp. 3012-3019.
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An advanced external compensation system for active matrix organic light-emitting diode displays with poly-Si thin-film transistor backplane. / In, Hai Jung; Oh, Kyong Hwan; Lee, Inhwan; Ryu, Do Hyung; Choi, Sang Moo; Kim, Keum Nam; Kim, Hye Dong; Kwon, Oh-Kyong.

In: IEEE Transactions on Electron Devices, Vol. 57, No. 11, 5580066, 01.11.2010, p. 3012-3019.

Research output: Contribution to journalArticle

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