50.2: A Real-time TFT Compensation through Power Line Current Sensing for High-resolution AMOLED Displays

50.2: A Real-time TFT Compensation through Power Line Current Sensing for High-resolution AMOLED Displays

A real‐time compensation method for TFT variation is proposed for AMOLED displays. This method enables a column driver to sense TFT current of each pixel using a power line as a current sensing line while driving a pixel without increasing a scan time. A fast OLED degradation sensing is also possibl...

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Veröffentlicht in:SID International Symposium Digest of technical papers 2014-06, Vol.45 (1), p.724-727
Hauptverfasser: Bang, Jun-Suk, Kim, Hyun-Sik, Park, Sang-Hui, Kim, Geon-Hee, Cho, Gyu-Hyeong
Format: Artikel
Sprache:eng
Schlagworte:
Active matrix displays
Detection
Displays
Organic light emitting diodes
Pixels
Real time
Semiconductor devices
Thin film transistors
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Zusammenfassung:A real‐time compensation method for TFT variation is proposed for AMOLED displays. This method enables a column driver to sense TFT current of each pixel using a power line as a current sensing line while driving a pixel without increasing a scan time. A fast OLED degradation sensing is also possible to compensate the image sticking problem. A target application of the proposed driver is a simultaneous emission full‐HD AMOLED TV, whose scan time is 7.5μs at a scan frequency of 120Hz.
ISSN:0097-966X
2168-0159
DOI:10.1002/j.2168-0159.2014.tb00190.x