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:
Aug. 25, 1998
Filed:
Feb. 29, 1996
Applicant:
Assignee:
Uniax Corporation, Santa Barbara, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
428212 ; 428209 ; 428457 ; 428690 ; 428704 ; 428917 ; 313503 ; 313504 ; 313505 ; 313506 ; 313510 ; 257 91 ; 257103 ; 427 66 ; 4274071 ;
Abstract
Long-lived organic light-emitting diodes are achieved by positioning a layer comprising polyaniline in the emeraldine salt form directly contiguous with the anode side of the active light-emitting layer. Particular advantages are achieved if the emeraldine salt-containing layer has a sheet resistance of at least about 10.sup.3 ohms per square which can be achieved by casting the layer from solution in a polar solvent, most particularly, DMSO. The LED's can find advantageous application in displays where they exhibit long life and marked resistance to blurring, spreading or other degradations over time.