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:
Jul. 18, 1989
Filed:
Jul. 15, 1988
Applicant:
Inventors:
Assignee:
Phosphor Products Company Limited, Poole, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ; H05B / ;
U.S. Cl.
CPC ...
313506 ; 313498 ;
Abstract
The present invention concerns an electroluminescent panel suitable for unidirectional and/alternating voltage order, a transparent glass substrate (10), a thin transparent front electrode film (12) made of indium-tin-oxide, a first thin (preferably 1-2 microns thick) layer (14) of a phosphor in the form of powder particles, the surface of the particles being free of any metallic coating, e.g. Cu coating, an electrically conducting, dark powder layer (16) which is a control layer consisting e.g. of MnO.sub.2 uncoated or undoped with Cu and a (preferably aluminium) back electrode layer )18).