Back to results
US 5,493,184 AGranted
Electrodeless lamp with improved efficiency
AssigneeFusion Lighting, Inc.
InventorsCharles H. Wood, Brian Turner
Life of this patent
Estimating the term…
Abstract
An electrodeless lamp which operates with a high efficiency and with a lower cooling requirement. The bulb is rotated at a high speed which results in a substantial increase in efficiency. Because more of the input energy is converted to light, and less to heat, the pressure of the cooling fluid source may be reduced, resulting in a less noisy system.
Claims22
An electrodeless lamp comprising,
- an electrodeless lamp bulb enclosing a discharge forming fill, said lamp bulb having a maximum internal dimension of less than 7 millimeters,
- means for coupling electromagnetic energy to said fill to excite said discharge forming fill to form a discharge which radiates light, and
- means for rotating said bulb about an axis at a speed which is sufficiently high to result in a substantial increase in the efficiency at which said light is radiated from the bulb.
An electrodeless lamp comprising,
- an electrodeless lamp bulb enclosing a discharge forming fill, which includes sulfur or a sulfur compound, said lamp bulb having a maximum internal dimension of less than 7 millimeters,
- means for coupling electromagnetic energy to said fill to excite said discharge forming fill to form a discharge which radiates light, and
- means for rotating said bulb about an axis at a speed which is sufficiently high to result in a substantial increase in the efficiency at which said light is radiated from the bulb.
An electrodeless lamp comprising,
- an electrodeless lamp bulb enclosing a sulfur containing discharge forming fill,
- means for coupling electromagnetic energy to said discharge forming fill to excite said fill to form a discharge which radiates light,
- said bulb having a maximum radius r, which is measured radially with respect to a rotation axis, and
- means for rotating said bulb about said rotation axis at an angular frequency w, wherein w.sub.2 r is at least about 1.75.times.10.sup.5 cm/sec.sup.2.
1 more element
An electrodeless lamp comprising,
- an electrodeless lamp bulb enclosing a discharge forming fill, which includes selenium or a selenium compound, said lamp bulb having a maximum internal dimension of less than 7 millimeters,
- means for coupling electromagnetic energy to said fill to excite said discharge forming fill to form a discharge which radiates light, and
- means for rotating said bulb about an axis at a speed which is sufficiently high to result in a substantial increase in the efficiency at which said light is radiated from the bulb.
An electrodeless lamp having improved efficiency comprising,
- an electrodeless lamp bulb having a maximum internal dimension of less than 7 millimeters which encloses a discharge forming fill which is capable of radiating molecular radiation upon excitation,
- means for coupling electromagnetic energy to said fill to excite said discharge forming fill to form a discharge which emits molecular radiation, and
- means for rotating said bulb about an axis at a speed which is sufficiently high to result in a substantial increase in the efficiency at which said radiation is emitted from the bulb.
Dependencies are inferred from the claim text.