The application of electro-luminescence to photic stimulation

Abstract A new method of photic stimulation is described which uses two electro-luminescent panels mounted in a pair of goggles. When suitably excited by AC, the panels become uniformly illuminated over the whole surface. Flicker is produced by modulating the exciting AC, and a circuit is given for producing square wave modulation of the panel brightness. The goggles standardize the distance between the source and the eye; they also obviate the need to control the ambient illumination. The method has been found to induce photic driving comparable with that obtained with a stroboscope.