Converting device including variable electroconductivity materia

Details Converting device including variable electroconductivity materia Converting device including variable electroconductivity materia

1992-11-06

1994-12-13

Braun, Fred L.

Photocopying

Contact printing

Light boxes

252500, 355219, 430 56, G03G 1500, G03G 506, H01B 100, H01C 1300

Patent

active

053733487

ABSTRACT:
A converting device, and recording and detecting methods using the same, wherein the converting device includes a converting layer containing a variable electroconductivity material exhibiting electronic charge conduction. The variable electroconductivity material includes: (a) an electroconductivity variation imparting agent which changes its ionic structure when exposed to one of light and heat energy, between nonionic and ionic structures, the electroconductivity variation imparting agent including at least one component selected from spiropyrane compounds, diazonium compounds, derivatives thereof, a mixture of a leuco dye and a halide compound, and an ionic dye; and (b) a charge transport substance, the electroconductivity of which varies in relation to the ionic structural change of the electroconductivity variation imparting agent, the charge transport substance including at least one component selected from an organic or inorganic charge transport material, a .pi.-electron conjugated polymer, and a charge-transfer complex compound; and a pair of electrodes formed on opposite major surfaces of said converting layer.

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