Abstract
This work presents a new pixel circuit adopting low-temperature
polycrystalline-silicon thin-film transistors (LTPS TFTs) for active-matrix
organic light-emitting diode (AMOLED) displays. The proposed pixel
circuit can compensate for the threshold voltage variations of the
LTPS TFTs with a simple structure. Simulated results demonstrate that
the OLED currents over the entire data voltage range are uniform for
$\pm {{0.5}}~{{V}}$
variations in the threshold voltage of the driving TFT,
unlike in a conventional circuit. Furthermore, the relative current
error rates for parasitic loads in the 1280
$\times$
720 resolution AMOLED
display are less than 6%.
© 2014 IEEE
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