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:
Dec. 20, 1988
Filed:
Jun. 10, 1985
Applicant:
Inventors:
Ifay F Chang, Chappaqua, NY (US);
Ronald I Feigenblatt, Dobbs Ferry, NY (US);
Webster E Howard, Yorktown Heights, NY (US);
Eugene I Gordon, Convent Station, NJ (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
3151693 ; 313486 ; 313495 ; 2523 / ;
Abstract
A cathodoluminescent lamp in the form of a vacuum diode or triode uses a self-supporting YAG crystal as the light emitter. The crystal shape can be selected (spherical, slab, bar) for desired effect and light trapping is turned to advantage by selectively coating the crystal surface to provide for preferential light emission.