US4539513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for starting and operating a high-pressure gas discharge lamp
Assignee: US Philips Corp
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Filing: 1983-11-25
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Granted: 1985-09-03
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Expires: 2003-11-25
Abstract
Abstract A circuit arrangement for starting and operating a high-pressure gas discharge lamp having an outer starting electrode connected to an igniter. A full-wave rectifier (1) is connected to an alternating voltage supply (A, B) and has an output shunted by a series arrangement of a diode (4) and a capacitor (5). The capacitor is discharged in part through the lamp (3) after each half period of the alternating voltage. A resistor (6), which is high-ohmic with respect to a current limiter (2), is connected in the current circuit between the end of the capacitor (5) facing the diode (4) and the lamp (3). Thus, starting of the lamp is facilitated.
Inventors
- 👤 Hans G. Ganser
- 👤 Ralf Schafer
- 👤 Hans P. Stormberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:16
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/16; H05B41/18; H05B41/19; Y; Y10; Y10S; Y10S315/00; Y10S315/07
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
143 words
A circuit arrangement for starting and operating a high-pressure gas discharge lamp having an outer starting electrode comprising, means connecting the discharge lamp in series with a current limiter to a voltage source, a starting-pulse producer which comprises a pulse transformer connected on the secondary side to the starting electrode and on the primary side to a pulse capacitor and to a controlled switching element, characterized in that the voltage source is a full-wave rectifier connected to an alternating voltage supply and having an output shunted by a series arrangement of a diode and a further capacitor which is discharged at least in part through the lamp after each half period of the alternating voltage, a resistor, which is high-ohmic with respect to the current limiter, connected in the current circuit between the end of said capacitor facing the diode and the lamp.
Claim 2
Dependent Claim
143 words
A circuit arrangement for starting and operating a high-pressure gas discharge lamp having an outer starting electrode comprising, means connecting the discharge lamp in series with a current limiter to a voltage source, a starting-pulse producer which comprises a pulse transformer connected on the secondary side to the starting electrode and on the primary side to a pulse capacitor and to a controlled switching element, characterized in that the voltage source is a full-wave rectifier connected to an alternating voltage supply and having an output shunted by a series arrangement of a diode and a further capacitor which is discharged at least in part through the lamp after each half period of the alternating voltage, a resistor, which is high-ohmic with respect to the current limiter, connected in the current circuit between the end of said capacitor facing the diode and the lamp.
Claim 3
Dependent Claim
21 words
A circuit arrangement as claimed in claim 1, wherein the further capacitor has a value between 10 nF and 1 μF.
Claim 4
Dependent Claim
21 words
A circuit arrangement as claimed in claim 1 wherein the further capacitor serves at the same time as the pulse capacitor.
Claim 5
Dependent Claim
23 words
A circuit arrangement as claimed in claim 1 wherein the current limiter is an ohmic resistor connected in series with a further diode.
Claim 6
Dependent Claim
47 words
A circuit arrangement as claimed in claim 1 wherein the current limiter is an electronic ballast unit, in front of which a further diode is connected in series, the end of the high-ohmic resistor facing the lamp being connected between said further diode and the ballast unit.
Claim 7
Dependent Claim
21 words
A circuit arrangement as claimed in claim 2, wherein the further capacitor serves at the same time as the pulse capacitor.
Claim 8
Dependent Claim
23 words
A circuit arrangement as claimed in claim 2, wherein the current limiter comprises an ohmic resistor connected in series with a further diode.
Claim 9
Dependent Claim
23 words
A circuit arrangement as claimed in claim 3, wherein the current limiter comprises an ohmmic resistor connected in series with a further diode.
Claim 10
Dependent Claim
23 words
A circuit arrangement as claimed in claim 6, wherein the current limiter comprises an ohmmic resistor connected in series with a further diode.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |