Title :
Stable Organic LED Displays Using RMS Estimation of Threshold Voltage Dispersion
Author :
Sambandan, Sanjiv ; Nathan, Arokia
Author_Institution :
Waterloo Univ., Ont.
Abstract :
Active matrix organic light-emitting-diode (OLED) displays using the amorphous silicon (a-Si:H) thin-film transistor (TFT) as the active element offer a promising avenue for high-performance displays. However, the TFT is prone to a gate-bias-dependent threshold voltage shift (VT shift) which leads to current instability, thus affecting the pixel brightness. This brief discusses an rms error estimation technique with an HVCMOS-TFT implementation to stabilize the OLED current
Keywords :
LED displays; amorphous semiconductors; brightness; organic light emitting diodes; silicon; thin film transistors; Si; current instability; organic light-emitting-diode displays; pixel brightness; thin-film transistor; threshold voltage dispersion; threshold voltage shift; Active matrix organic light emitting diodes; Brightness; Circuits; Costs; Error analysis; Flat panel displays; Light emitting diodes; Organic light emitting diodes; Thin film transistors; Threshold voltage; Displays; error estimation; thin-film circuits; time-varying systems;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2006.880028
