Electric lamp and discharge devices – With luminescent solid or liquid material – Vacuum-type tube
Reexamination Certificate
2007-05-09
2010-11-16
Won, Bumsuk (Department: 2889)
Electric lamp and discharge devices
With luminescent solid or liquid material
Vacuum-type tube
C313S495000, C313S496000
Reexamination Certificate
active
07834536
ABSTRACT:
A light-emitting apparatus of the present invention maintains an anode electrode5at a higher positive electric potential than a cathode electrode15, applies an electric field to a cold-cathode electron emission source16by controlling a gate voltage applied to the cathode electrode15with a gate electrode10, and emits excitation light from a phosphor6irradiated by an electron beam released from the cold-cathode electron emission source16. 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 phosphor6through a glass substrate2, but also from the electron bean-irradiated surface of the phosphor6by reflecting the excitation light with a gate reflection surface12on the gate electrode10and emitting it through an unobstructed area Ro of the glass substrate2. 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.
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European Patent Office, Supplementary European Search Report, European Patent Application No. 07107864.6 dated May 11, 2009, 7 pages.
Namba Atsushi
Takahashi Hisaya
Fuji Jukogyo Kabushiki Kaisha
Haynes and Boone LLP
Won Bumsuk
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