Frishauf, Holtz, Goodman, Langer & Chick, P.C.
Display device for performing display operation in accordance with signal light and driving method therefor
 A display device includes an EL element for signal light which is based on the segment matrix drive scheme and causes a plurality of areas to emit signal light containing light in a wavelength range other than the visible range, a photoconductive layer which generates carriers upon incidence of signal light, and an EL element for display light which is adjacent to the photoconductive layer. Signal light is irradiated onto desired areas of the photoconductive layer. Carriers are injected from the irradiated areas into the EL layer to emit display light containing visible light. 
Casio Computer Co., Ltd.
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Hiroyasu Masaharu Tomoyuki
Yamada Shioya Shirasaki