Letter: A new compensation pixel circuit with metal oxide thin-film transistors for active-matrix organic light-emitting diode displays.

This paper presents a novel compensation pixel circuit for active-matrix organic light-emitting diode displays, in which the coupling effect mask technology is developed to compensate the threshold voltage of driving thin-film transistor whether it is positive or negative. Twenty discrete compensation pixel circuits have been fabricated by In-Zn-O thin-film transistors process. It is measured that the non-uniformity of the proposed pixel circuit is significantly reduced with an average value of 8.6%. Furthermore, the organic light-emitting diode emission current remains constant during 6 h continuous operation, which also confirms the validity of the proposed pixel circuit. [ABSTRACT FROM AUTHOR]