Improvement of brightness uniformity by AC driving scheme for AMOLED display

We propose an AC voltage driving scheme which can improve the brightness uniformity of active-matrix organic light-emitting diode (AMOLED) displays. Through the use of a charge feed-through mechanism and an AC driving voltage, the voltage drop caused by the parasitic resistance can be compensated. A...

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Bibliographic Details
Published in:IEEE electron device letters 2004-11, Vol.25 (11), p.728-730
Main Authors: Yen-Chung Lin, Shieh, H.-P.D.
Format: Article
Language:English
Subjects:
Active matrix organic light emitting diodes
Active matrix technology
Applied sciences
Brightness
Circuits
Display
Driving
Electric potential
Electrodes
Electronics
Exact sciences and technology
Flat panel displays
Liquid crystal displays
Optoelectronic devices
Organic light emitting diodes
Performance evaluation
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Silicon
Thin film transistors
Transistors
Variability
Voltage
Voltage drop
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Summary:We propose an AC voltage driving scheme which can improve the brightness uniformity of active-matrix organic light-emitting diode (AMOLED) displays. Through the use of a charge feed-through mechanism and an AC driving voltage, the voltage drop caused by the parasitic resistance can be compensated. A 2.2 in AMOLED panel with a resolution of 176/spl times/RGB/spl times/220 has been fabricated by low temperature polycrystalline silicon technology to evaluate the performance of the AC driving scheme. Experimental results show that a brightness uniformity of higher than 91.6%, achieved by the AC driving scheme, in contrast to that of 74% achieved by a DC driving scheme.
ISSN:0741-3106
1558-0563
DOI:10.1109/LED.2004.837535