Abstract: A drive system for a thin-film EL matrix display panel includes first and second voltage doubler circuits and a DC booster circuit. A 1/4V.sub.M voltage, which has the 1/4 voltage level of the modulation voltage, is applied to the first voltage doubler circuit of which an output voltage is applied to a modulation voltage applying circuit. The 1/4V.sub.M voltage is further applied to the DC booster circuit which develops an output voltage having a voltage level of 1/2V.sub.W. The thus obtained 1/2V.sub.W voltage is applied to the second voltage doubler circuit of which an output voltage is applied to a write voltage applying circuit.

Abstract: A machine and telephone controller for complex machine functions which is operated by simply looking at it and winking the eye in a preset code. Photocell and electronic logic circuitry stop a sequencing digital display at the desired numerals and activates the machine or telephone for the displayed number which may indicate either a function of a machine or a telephone number to be dialed.