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:
Nov. 16, 2010
Filed:
May. 09, 2007
Hisaya Takahashi, Kanagawa-ken, JP;
Atsushi Namba, Tokyo, JP;
Hisaya Takahashi, Kanagawa-ken, JP;
Atsushi Namba, Tokyo, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A light-emitting apparatus of the present invention maintains an anode electrodeat a higher positive electric potential than a cathode electrode, applies an electric field to a cold-cathode electron emission sourceby controlling a gate voltage applied to the cathode electrodewith a gate electrode, and emits excitation light from a phosphorirradiated by an electron beam released from the cold-cathode electron emission source. The light-emitting apparatus of this invention emits the excitation light not only from the opposite side of the electron beam-irradiated surface of the phosphorthrough a glass substrate, but also from the electron bean-irradiated surface of the phosphorby reflecting the excitation light with a gate reflection surfaceon the gate electrodeand emitting it through an unobstructed area Ro of the glass substrate. This eliminates the wasted excitation light emitted and absorbed within the apparatus as in the conventional light-emitting apparatuses to thereby improve the luminous efficiency and substantially increase the amount of light emitted outside from the entire illumination surface.