Abstract: A thin film EL display panel is composed of an EL layer placed between scanning electrodes and data side electrodes which are arranged at right angles to the scanning electrodes. A thin film EL display panel drive circuit includes a first and a second switching circuits connected to each of the scanning electrodes to apply voltages of negative and positive polarities, respectively, with respect to the voltage of the data side electrodes; and third and a fourth switching circuits connected to each of the data side electrodes to respectively charge and discharge the EL layer corresponding to the scanning electrode.

Abstract: A thin film electroluminescent (EL) display panel drive circuit includes first and second switching circuits for driving scanning electrodes of the panel in two fields, wherein odd numbered scanning electrodes are applied with a negative voltage polarity and even numbered scanning electrodes are provided with a positive voltage polarity in a first field, and the voltage polarities are reversed during the second field. Data signals are applied to data electrodes by a data electrode driver circuit which includes third and fourth switching circuits for providing selected data electrodes with a modulate voltage of a stepwise nature or ground, depending upon whether the selected data electrodes intersect with selected scanning electrodes having a negative or positive voltage polarity respectively. The stepwise modulation voltage is supplied by a control switching circuit which selectively supplies the third switching circuit with voltages of a first level, a second level and a floating level.

Abstract: The present invention relates to a driving circuit of a thin film electroluminescent (EL) display, wherein a high withstand-voltage driver IC composed of a bi-directional switching element having push/pull function is connected with one or both of the scanning electrodes and the data electrodes of EL display, the bi-directional switching circuit for applying the writing voltage or the modulation voltage is applied with the pull up common line of each of the drivers IC and the pull down common line, a switch for extremely recovering, after the thin film EL element has emitted its light, the electric charge accumulated on the thin film EL display element, and a capacitor for accumulating the drawn out electric charge are disposed in the bi-directional switching circuit, and the modulation accumulation electric charge accumulated on the film EL display element after the light emission is accumulated on the capacitor, so that the modulation consumption power occupying the majority of the driving power without the