Design Method for Area-efficient and Uniform Channel DACs in Current-mode AMOLED Display Data Drivers

Abstract

A current-mode driving scheme has significant advantages over other competing driving method, and the scheme does not require the time-consuming threshold voltage sampling process used in recent voltage-mode driving methods. Design considerations for compact and uniform channel DACs in current-mode AMOLED display data drivers are addressed in detail. Furthermore, an 8 bit area-efficient cascaded-dividing DAC and a 9 bit segmented DAC are designed in accordance with the suggested DAC design method. The presented DACs perform outstandingly when compared in terms of a composite DAC performance that comprises chip area, power consumption, sampling frequency, and DAC bit resolution.