Display device for performing display operation in accordance with signal light and driving method therefor

Claim 1

A display device for performing a display operation, comprising: an addressing element including an organic electric luminescent element having a plurality of areas arranged in a matrix for emitting signal light, a plurality of first striped electrodes facing one surface of said organic electric luminescent element and extending in a predetermined direction, and a plurality of second striped electrodes facing another surface of said organic electric luminescent element and extending in a direction perpendicular to said first striped electrodes, said second striped electrodes being transparent with respect to the signal light; a display element including a light-receiving element for receiving the signal light and generating carriers corresponding to the signal light, an organic electric luminescent layer adjacent to said light-receiving element, a plurality of first display electrodes each facing one surface of said light-receiving element, and a second display electrode facing one surface of said organic electric luminescent layer; and a half mirror interposed between said addressing element and said light-receiving element and set so that a distance L to said first striped electrodes and a wavelength λ of the signal light substantially satisfy L=n·λ/2, where n is a natural number; wherein said organic electric luminescent layer of said display element emits display light when the carriers generated by said light-receiving element are recombined in said organic electric luminescent layer responsive to a voltage applied between said first display electrodes and said second display electrode.