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:
Feb. 01, 2005
Filed:
Jul. 17, 2000
Long lifetime polymer light-emitting devices with improved luminous efficiency and improved radiance
Applicants:
Marie B. O'regan, Santa Barbara, CA (US);
Chi Zhang, Goleta, CA (US);
Inventors:
Marie B. O'Regan, Santa Barbara, CA (US);
Chi Zhang, Goleta, CA (US);
Assignee:
DuPont Displays, Inc., Santa Barbara, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 3524 ;
U.S. Cl.
CPC ...
Abstract
The luminous efficiency and radiance of light emitting diodes (LEDs) fabricated from organic emissive materials can be increased by using a multilayer cathode including a low work function layer and a high work function high reflectivity layer, in combination with a high work function, high reflectivitity anode material in the device.