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:
Jan. 30, 1979
Filed:
Oct. 18, 1977
Applicant:
Inventors:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ; H05B / ;
U.S. Cl.
CPC ...
313503 ; 313506 ; 313512 ;
Abstract
A d.c. electroluminescent panel comprises a transparent substrate, a transparent first electrode film, a phosphor layer, and a second electrode film. Application of a voltage across the phosphor layer causes it to emit light. In this invention the phosphor layer is produced in two layers, a first semi-insulating thin layer of activator doped phosphor and a second electrically conducting layer of phosphor.