EL display driver and system using floating charge transfers to reduce power consumption

摘要

An EL display driver is capable of reducing electric power consumption during driving of an EL display without a significant increase in device structure and control complexity. In a thin film EL display having scanning electrodes and data electrodes arranged orthogonally crossing one another holding an EL layer therebetween, by reversing the polarity of scanning voltages for every other field, then switching scanning electrodes (display lines) to which scanning voltages are applied, FETs for connecting a subsequent display line to a voltage supplying line are switched on where no scanning voltage is applied to a positive or negative voltage supplying line and part of an electric charge stored in an EL element for which display control is finished is directly moved to an EL element on a subsequent display line. As a result, electric power consumption for driving the EL display can be reduced.