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:
Oct. 23, 2012
Filed:
Sep. 11, 2009
Richard N. Herring, Longmont, CO (US);
Charles E. Hunt, Davis, CA (US);
Thomas Skupien, Rockton, IL (US);
Tomas Hasilik, Olomouc, CZ;
Viktor Jelinek, Olomouc, CZ;
Bernard K. Vancil, Beaverton, OR (US);
Richard N. Herring, Longmont, CO (US);
Charles E. Hunt, Davis, CA (US);
Thomas Skupien, Rockton, IL (US);
Tomas Hasilik, Olomouc, CZ;
Viktor Jelinek, Olomouc, CZ;
Bernard K. Vancil, Beaverton, OR (US);
Vu1 Corporation, New York, NY (US);
Abstract
Electron sources for a cathodoluminescent lighting system are disclosed. An electron source is a broad-beam reflecting-type electron gun having a cathode for emitting electrons and a reflector and/or secondary emitter electrode and no grids. An alternative electron gun has a cathode having a heater welded to a disk, the disk having an emissive surface on a side facing a dome-shaped defocusing grid and an anode. A lighting system incorporating the electron sources has an envelope with a transparent face, an anode with a phosphor layer to emit light through the face and a conductor layer. The system also has a power supply for providing from five to thirty thousand volts of power to the light emitting device to draw electrons from cathode to anode and excite a cathodoluminescent phosphor, and the electrons transiting from cathode to anode are essentially unfocused. A power-factor-corrected embodiment is also disclosed.