Title :
A Simple and Effective Approach to Improve the Output Linearity of Switched-Current AMOLED Pixel Circuitry
Author :
Guo, Xiaojun ; Silva, S.R.P.
Abstract :
Switched-current (S-I)-type pixel circuits are widely studied for high-performance active-matrix organic light-emitting-diode displays but suffer significant sampling and hold (S/H) nonidealities. In this letter, a simple and effective capacitive compensation method is proposed to suppress the S/H nonidealities and, thus, to greatly improve the current-reproducing accuracy and the output linearity of the circuits. The analysis procedure clearly demonstrates the operation mechanism of the method, and the simulation results of simulation program with integrated circuit emphasis prove its excellent applicability for S-I pixel circuits.
Keywords :
LED displays; SPICE; current-mode circuits; driver circuits; organic light emitting diodes; sample and hold circuits; switched current circuits; thin film circuits; SPICE simulation; active-matrix organic light-emitting-diode display; capacitive compensation; current-mode circuit; current-reproducing accuracy; output linearity; sampling and hold nonidealities; switched-current AMOLED pixel circuitry; thin-flm transistor circuit; Active matrix organic light emitting diodes; Active matrix technology; Analytical models; Circuit analysis; Circuit simulation; Displays; Linearity; SPICE; Sampling methods; Switching circuits; Active-matrix; current-mode; organic light-emitting diode (OLED); sampling and hold; switched-current (SI); thin-film transistor (TFT);
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2007.904905
