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US 7,067,970 B2Granted
Light emitting device
AssigneeNGK Insulators, Ltd.
InventorsYukihisa Takeuchi, Tsutomu Nanataki, Iwao Ohwada
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Abstract
A light emission device has an emitter made of a dielectric material, a cathode electrode disposed on a surface of the emitter, an anode electrode disposed on a reverse surface of the emitter, and a pulse generation source for applying a drive voltage between the cathode electrode and the anode electrode through a resistor. A fluorescent body is disposed on the surface of the emitter out of contact with the cathode, but as closely to the cathode electrode as possible.
Claims27
A light emission device comprising:
- a substance disposed in a vacuum atmosphere and sewing as an emitter made of a dielectric material;
- and
- a first electrode, a second electrode, and a fluorescent body which are disposed in contact with said substance serving as the emitter;
- wherein when a drive voltage is applied between said first electrode and said second electrode, the polarization of at least a portion of said substance serving as the emitter is reversed or changed to emit electrons from at least a portion of said first electrode, and said electrons impinge upon said fluorescent body to emit light therefrom.
1 more element
A light emission device comprising:
- a substance disposed in a vacuum atmosphere and serving as an emitter made of a dielectric material;
- and
- a first electrode, a second electrode, and a fluorescent body which are disposed in contact with said substance serving as the emitter, said fluorescent body being spaced from said first electrode and said second electrode;
- wherein when a drive voltage is applied between said first electrode and said second electrode, the polarization of at least a portion of said substance serving as the emitter is reversed or changed to emit electrons from at least a portion of said first electrode, and said electrons impinge upon said fluorescent body to emit light therefrom.
1 more element
A light emission device comprising:
- a substance disposed in a vacuum atmosphere and serving as an emitter made of a dielectric material;
- and
- a first electrode, a second electrode, and a fluorescent body which are disposed in contact with said substance serving as the emitter;
- wherein when a drive voltage is applied between said first electrode and said second electrode, the polarization of at least a portion of said substance serving as the emitter is reversed or changed to emit electrons from at least a portion of said first electrode, and said electrons pass through said vacuum before impinging upon said fluorescent body to emit light therefrom.
1 more element
Dependencies are inferred from the claim text.