US5349271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeless discharge lamp with spiral induction coil
Assignee: Diablo Research Corp
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Filing: 1993-03-24
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Granted: 1994-09-20
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Expires: 2013-03-24
Abstract
Abstract An electrodeless discharge lamp includes a discharge vessel containing an ionizable vapor, a generator for providing a high frequency signal, and an induction coil adjacent the discharge vessel and connected to the generator. The induction coil is shaped in the form of a planar spiral. The spiral coil is formed of wire or made of metal etched in a spiral pattern onto a substrate. The electrodeless discharge lamp having a spiral induction coil shows low lumen depreciation, a high linear relationship between light output and power input and produces low radio frequency interference.
Inventors
- 👤 Ron van Os
- 👤 Derek Bray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:40
CPC Classifications
H; H01; H01J; H01J65/00; H01J65/04; H01J65/042; H01J65/048; H05; H05B; H05B41/00; H05B41/14; H05B41/24; H05B41/26; H05B41/28; H05B41/2806; H05B41/282; H05B41/2825; H05B41/2827; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
53 words
An electrodeless discharge lamp comprising: a discharge vessel containing an ionizable vapor; and a generator for providing a high-frequency signal to an induction coil; the induction coil connected to the generator and disposed adjacent the discharge vessel, the induction coil comprising a conductive path shaped in the form of a substantially planar spiral.
Claim 2
Dependent Claim
53 words
An electrodeless discharge lamp comprising: a discharge vessel containing an ionizable vapor; and a generator for providing a high-frequency signal to an induction coil; the induction coil connected to the generator and disposed adjacent the discharge vessel, the induction coil comprising a conductive path shaped in the form of a substantially planar spiral.
Claim 3
Dependent Claim
16 words
A lamp as in claim 1, wherein the discharge vessel comprises a substantially flat bottom surface.
Claim 4
Dependent Claim
32 words
A lamp as in claim 1, wherein the induction coil comprises a second conductive path shaped in the form of a substantially planar spiral, said conductive paths together forming a double spiral.
Claim 5
Dependent Claim
16 words
A lamp as in claim 3, wherein said conductive paths are separated by a supporting member.
Claim 6
Dependent Claim
14 words
A lamp as in claim 3, wherein the generator comprises a Class D amplifier.
Claim 7
Dependent Claim
14 words
A lamp as in claim 3, wherein the generator comprises a Class E amplifier.
Claim 8
Dependent Claim
19 words
A lamp as in claim 4, wherein said conductive paths are formed on the two sides of a substrate.
Claim 9
Dependent Claim
17 words
A lamp as in claim 1, wherein the induction coil comprises a metal formed on a substrate.
Claim 10
Dependent Claim
14 words
A lamp as in claim 8, wherein the substrate is a printed circuit board.
Claim 11
Dependent Claim
54 words
A lamp as in claim 1, wherein said induction coil is formed on two sides of a supporting member, said induction coil comprising a series of coil sections, said coil sections being connected in series on alternate sides of said supporting member, each of said sections being in the shape of a spiral curve.
Claim 12
Dependent Claim
24 words
A lamp as in claim 1, wherein the induction coil is located near the outer periphery of the flat bottom surface of the vessel.
Claim 13
Dependent Claim
14 words
A lamp as in claim 1, wherein the generator comprises a Class D amplifier.
Claim 14
Dependent Claim
22 words
A lamp as in claim 1, wherein the generator is located inside a lower portion of the lamp below the induction coil.
Claim 15
Dependent Claim
23 words
A lamp as in claim 13, wherein the lower portion of the lamp includes a sheet of metal for shielding of electromagnetic field.
Claim 16
Dependent Claim
98 words
A discharge lamp comprising: an upper portion of the lamp formed by a discharge vessel, said discharge vessel including a flat bottom surface and a light-emitting surface; a spiral coil substantially in a single plane, located near the bottom surface of the discharge vessel for exciting an electromagnetic field inside the discharge vessel; a lower portion of the lamp including a high frequency power supply unit for supplying power to the spiral coil; and an Edison base located at the bottom of the lamp for connecting the high frequency power supply unit to external main power supply lines.
Claim 17
Dependent Claim
98 words
A discharge lamp comprising: an upper portion of the lamp formed by a discharge vessel, said discharge vessel including a flat bottom surface and a light-emitting surface; a spiral coil substantially in a single plane, located near the bottom surface of the discharge vessel for exciting an electromagnetic field inside the discharge vessel; a lower portion of the lamp including a high frequency power supply unit for supplying power to the spiral coil; and an Edison base located at the bottom of the lamp for connecting the high frequency power supply unit to external main power supply lines.
Claim 18
Dependent Claim
21 words
An electrodeless discharge lamp as in claim 11 wherein a wall of said vessel is coated with one or more phosphors.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-09-19 | 1998-03-21 | 1998-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-19 | 2002-03-21 | 2002-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-19 | 2006-03-21 | 2006-09-20 | $7700.00 | Window Closed / Lapsed |