The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 1991
Filed:
Feb. 23, 1990
Pascal Thioulouse, Paris, FR;
Centre National d'Etudes des Telecommunications, Issy les Moulineaux, FR;
Abstract
A photoconductive-electroluminescent, memory effect polychromatic display defining a first and second inverted structure. The first structure incorporates a first transparent substrate equipped with a first electroluminescent layer El.sub.1 placed between a first and a second electrode system, which are connected to a first electrical source for exciting certain zones of layer El.sub.1. The second inverted structure incorporates a second substrate equipped with a second electroluminescent layer El.sub.2 and a photoconductive layer stacked on one another. These two layers are inserted between a third and a fourth electrode system which are connected to a second electrical source for exciting certain zones of the layer El.sub.2. The electroluminescent layer El.sub.1 has a monochromatic or dichromatic emission spectrum and the electroluminescent layer El.sub.2 has a monochromatic emission spectrum essentially complementary to layer El.sub.1.