Back to results
US 7,397,173 B2Granted
Lighting apparatus using microwave energy
AssigneeLG Electronics Inc.
InventorByoung-Ok Min
Life of this patent
Estimating the term…
Abstract
A lighting apparatus using microwave energy comprises, a magnetron disposed inside a casing, for generating microwave energy; a waveguide for guiding microwave energy; a resonator providing a resonant region in which the microwave energy is resonated; a bulb disposed inside the resonator, and filled with a material which emits light, when excited by the microwave energy; and a rear mirror integrally fixed to a rear of the bulb, for forwardly reflecting light which is rearward emitted from the bulb.
Claims4
A lighting apparatus using microwave energy, comprising:
- a casing;
- a reflector fixed to an outer surface of the casing;
- a magnetron disposed inside the casing, for generating microwave energy;
- a waveguide for guiding microwave energy;
- a resonator disposed inside the reflector and providing a resonant region in which the microwave energy is resonated;
- a bulb having a stem disposed inside the resonator, and filled with a material which emits light, when excited by the microwave energy;
- a rear mirror formed in a hemispherical shape having a curved surface integrally fixed to the bulb stem and integrally rotatable together with the bulb when the bulb is rotated, for forwardly reflecting light rearwardly emitted from the bulb;
- and
- a fixed mirror formed in a hemispherical shape having a curved surface fixed to the casing at a rear side of the bulb and having a hole in which a bulb stem rearwardly extended from the bulb is rotatably insertable for forwardly reflecting light emitted to the rear of the bulb,
- wherein a diameter of the hole of the fixed mirror is formed to be smaller than a width of the rear mirror, and the center of the bulb is positioned at a focal point of both the curved surface of the rear mirror and the curved surface of the fixed mirror.
7 more elements
Dependencies are inferred from the claim text.