US4473778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge lamp starting device
Assignee: Mitsubishi Electric Corp
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Filing: 1982-10-29
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Granted: 1984-09-25
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Expires: 2002-10-29
Abstract
Abstract A discharge lamp circuit in which the lamp is substantially instantaneously started and in which the power consumption of the lamp after starting is reduced with substantially no vibration due to piezoelectric effects and caused by currents flowing through a nonlinear dielectric element. An inductive stabilizer is connected in series with one of the filaments of the discharge lamp and a nonlinear circuit is connected in parallel with the filaments of the discharge lamp. The nonlinear circuit is composed of a nonlinear dielectric element and a bidirectional switching means connected in parallel with the nonlinear dielectric element. A reverse-conductive circuit is connected in series with the nonlinear circuit and in parallel with the filaments of the discharge lamp, the reverse-conductive circuit including a reverse-conductive semiconductor switch mean which is conduction-controlled in the forward direction but which is always conductive in the reverse direction.
Inventors
- 👤 Hiromi Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:04
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/02; H05B41/04; H05B41/042; H05B41/044; H05B41/046
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
A discharge lamp device comprising: a discharge lamp; an inductive stabilizer connected in series with said discharge lamp; a nonlinear circuit connected in parallel with said discharge lamp and comprising a nonlinear dielectric element and bidirectional switching means connected in parallel with said nonlinear dielectric element; and a reverse-conductive circuit connected in series with said nonlinear circuit and in parallel with the discharge lamp, said reverse-conductive circuit comprising reverse-conductive semiconductor switch means conduction-controlled forwardly and always conductive reversely.
Claim 2
Dependent Claim
78 words
A discharge lamp device comprising: a discharge lamp; an inductive stabilizer connected in series with said discharge lamp; a nonlinear circuit connected in parallel with said discharge lamp and comprising a nonlinear dielectric element and bidirectional switching means connected in parallel with said nonlinear dielectric element; and a reverse-conductive circuit connected in series with said nonlinear circuit and in parallel with the discharge lamp, said reverse-conductive circuit comprising reverse-conductive semiconductor switch means conduction-controlled forwardly and always conductive reversely.
Claim 3
Dependent Claim
25 words
The discharge lamp device as set forth in claim 1, wherein said nonlinear circuit further comprises a diode serially connected with said bidirectional switching means.
Claim 4
Dependent Claim
32 words
The discharge lamp device as set forth in claim 1, wherein said reverse-conductive semiconductor switching means comprises a reverse-blocking triode thyristor and a diode connected in parallel with said reverse-blocking triode thyristor.
Claim 5
Dependent Claim
30 words
The discharge lamp device as set forth in claim 1, wherein said reverse-conductive semiconductor switching means comprises a diode thyristor and a diode connected in parallel with said diode thyristor.
Claim 6
Dependent Claim
19 words
The discharge lamp device as set forth in claim 1, wherein said bidirectional switching means comprises a diode thyristor.
Claim 7
Dependent Claim
96 words
A discharge lamp device comprising: a discharge lamp; an inductive stabilizer connected in series with a filament of said discharge lamp; a nonlinear circuit connected in parallel with filaments of said discharge lamp and comprising a nonlinear dielectric element and a bidirectional switching means connected in parallel with said nonlinear dielectric element; and a reverse-conductive circuit connected in series with said nonlinear circuit and in parallel with the discharge lamp, said reverse-conductive circuit comprising reverse-conductive semiconductor switch means conduction-controlled forwardly and always conductive reversely, and an impedance element connected in parallel with said reverse-conductive semiconductor switch.
Claim 8
Dependent Claim
96 words
A discharge lamp device comprising: a discharge lamp; an inductive stabilizer connected in series with a filament of said discharge lamp; a nonlinear circuit connected in parallel with filaments of said discharge lamp and comprising a nonlinear dielectric element and a bidirectional switching means connected in parallel with said nonlinear dielectric element; and a reverse-conductive circuit connected in series with said nonlinear circuit and in parallel with the discharge lamp, said reverse-conductive circuit comprising reverse-conductive semiconductor switch means conduction-controlled forwardly and always conductive reversely, and an impedance element connected in parallel with said reverse-conductive semiconductor switch.
Claim 9
Dependent Claim
26 words
The discharge lamp device as set forth in claim 6, wherein said nonlinear circuit further comprises a diode connected in series with said bidirectional switching means.
Claim 10
Dependent Claim
31 words
The discharge lamp device as set forth in claim 6, wherein said reverse-conductive semiconductor switching means comprises a reverse-blocking triode thyristor and a diode connected in parallel with said triode thyristor.
Claim 11
Dependent Claim
30 words
The discharge lamp device as set forth in claim 6, wherein said reverse-conductive semiconductor switching means comprises a diode thyristor and a diode connected in parallel with said diode thyristor.
Claim 12
Dependent Claim
19 words
The discharge lamp device as set forth in claim 6, wherein said bidirectional switching means comprises a diode thyristor.
References Cited (Backward Citations)
US4360762A
Cited
US4347462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |