Patent ID: 7960907
Filing Date: 2011-06-14
Classification: H01J

Abstract:
1. A light-emitting apparatus comprising, within a vacuum chamber, a cathode electrode having an electron emission source and an anode electrode having a fluorescent material which emits light upon excitation by the field-emitted electrons from said electron emission source, said apparatus exteriorly radiating the light emitted by said fluorescent material upon excitation from a light transmission ember mounted in said vacuum chamber; wherein said cathode electrode is mounted on a periphery of said light transmission member, and said anode electrode is mounted in a domain opposite to said light transmission member; and wherein the surface of said fluorescent material on a top layer of said anode electrode is formed with a concave face which directly faces said electron emission source to cause said field-emitted electrons to be directed to said surface without an additional electron reflective means for repelling said electrons toward said surface and away from said light transmission member, and said concave face further directs the excitation light to said light transmission member.