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. 16, 1990
Filed:
Sep. 15, 1988
Applicant:
Inventor:
Sel B Colak, Ossining, NY (US);
Assignee:
North American Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 44 ; 372 50 ;
Abstract
Wide band gap, single conductivity type semiconductor light emitting diodes (LED's) feature a bias potential across the device below that required for carrier multiplication by avalanche breakdown, together with separate means for carrier introduction, such as an electron beam of a pn junction diode, to achieve light emission. The addition of Fabry-Perot surfaces converts the LED to a semiconductor laser. Efficiency enhancing heterostructure, including potential wells and staircases, may be added to the device. Arrays of such devices on a substrate may be scanned by an electron beam to display video information.