Patent US4777427A successfully refreshed from Google Patents.
US4777427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driving device for electro-luminescence
Assignee: Canon Inc
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Filing: 1987-06-01
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Granted: 1988-10-11
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Expires: 2007-06-01
Abstract
Abstract A device for driving an electro-luminescence in which an electrical power source, a coil and a switching means are connected in series to each other. The switching means is time-serially opened and closed by a control unit, and is connected in parallel to the electro-luminescence.
Inventors
- 👤 Shuichi Kiyohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:06
CPC Classifications
H; H05; H05B; H05B44/00; Y; Y02; Y02B; Y02B20/00; Y02B20/30; Y10; Y10S; Y10S323/00; Y10S323/905
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
120 words
A driving device for use with an electrical power supply having a given terminal voltage for electro-luminescence, comprising: (a) a series circuit for connection to said electrical power supply, said series circuit having a coil and an electrical switching means having main electrodes and a control electrode; (b) control means for applying signals to said control electrode of said switching means to render said switching means alternately conductive and non-conductive; and (c) electro-luminescence means connected in parallel to said switching means, the inductance value of said coil and the capacitance value of said electro-luminescence means being selected to effect resonance and application of a voltage to said electro-luminescence means in excess of said terminal voltage of said electrical power supply.
Claim 2
Dependent Claim
120 words
A driving device for use with an electrical power supply having a given terminal voltage for electro-luminescence, comprising: (a) a series circuit for connection to said electrical power supply, said series circuit having a coil and an electrical switching means having main electrodes and a control electrode; (b) control means for applying signals to said control electrode of said switching means to render said switching means alternately conductive and non-conductive; and (c) electro-luminescence means connected in parallel to said switching means, the inductance value of said coil and the capacitance value of said electro-luminescence means being selected to effect resonance and application of a voltage to said electro-luminescence means in excess of said terminal voltage of said electrical power supply.
Claim 3
Dependent Claim
15 words
A driving device according to claim 1, wherein said switching means includes a semiconductor element.
Claim 4
Dependent Claim
15 words
A driving device according to claim 2, wherein said semiconductor element includes an npn transistor.
Claim 5
Dependent Claim
163 words
A driving device for use with an electrical power supply having a given terminal voltage for electro-luminescence, comprising: (a) a series circuit for connection said electrical power supply, said series circuit having a coil, an electrical switching means having main electrodes and a control electrode and a unidirectional semiconductor element connected in forward direction between said coil and one of the main electrodes of said switching means; (b) control means for applying signals to said control electrode of said switching means to render said switching means alternately conductive and non-conductive; and (c) electro-luminescence means having a first terminal connected to a junction point between said coil and said unidirectional semiconductor element and a second terminal connected to a main electrode of said switching means, the inductance value of said coil and the capacitance value of said electro-luminescence means being selected to effect resonance and application of a voltage to said electro-luminescence means in excess of said terminal voltage of said electrical power supply.
Claim 6
Dependent Claim
163 words
A driving device for use with an electrical power supply having a given terminal voltage for electro-luminescence, comprising: (a) a series circuit for connection said electrical power supply, said series circuit having a coil, an electrical switching means having main electrodes and a control electrode and a unidirectional semiconductor element connected in forward direction between said coil and one of the main electrodes of said switching means; (b) control means for applying signals to said control electrode of said switching means to render said switching means alternately conductive and non-conductive; and (c) electro-luminescence means having a first terminal connected to a junction point between said coil and said unidirectional semiconductor element and a second terminal connected to a main electrode of said switching means, the inductance value of said coil and the capacitance value of said electro-luminescence means being selected to effect resonance and application of a voltage to said electro-luminescence means in excess of said terminal voltage of said electrical power supply.
Claim 7
Dependent Claim
15 words
A driving device according to claim 4, wherein said switching means includes a semiconductor element.
Claim 8
Dependent Claim
15 words
A driving device according to claim 5, wherein said semiconductor element includes an npn transistor.
Claim 9
Dependent Claim
17 words
A driving device according to claim 6, wherein said one-way element includes a diode having two electrodes.
Claim 10
Dependent Claim
21 words
A driving device according to claim 7, wherein a cathode of said diode is connected to a collector of the transistor.
Claim 11
Dependent Claim
121 words
A driving device for use with an electrical power supply having a given terminal voltage for electro-luminescence, comprising: (a) a series circuit for connection to said electrical power supply, said series circuit having a coil and an electrical switching means having main electrodes and a control electrode; (b) control means for applying signals to said control electrode of said switching means to render said switching means alternately conductive and non-conductive; and (c) a light-emitting element connected in parallel to said switching means, the inductance value of said coil and the capacitance value of said light-emitting element being selected to effect resonance and application of a voltage to said light-emitting element in excess of said terminal voltage of said electrical power supply.
Claim 12
Dependent Claim
121 words
A driving device for use with an electrical power supply having a given terminal voltage for electro-luminescence, comprising: (a) a series circuit for connection to said electrical power supply, said series circuit having a coil and an electrical switching means having main electrodes and a control electrode; (b) control means for applying signals to said control electrode of said switching means to render said switching means alternately conductive and non-conductive; and (c) a light-emitting element connected in parallel to said switching means, the inductance value of said coil and the capacitance value of said light-emitting element being selected to effect resonance and application of a voltage to said light-emitting element in excess of said terminal voltage of said electrical power supply.
Claim 13
Dependent Claim
165 words
A driving device for use with an electrical power supply having a given terminal voltage for electro-luminescence, comprising: (a) a series circuit for connection to said electrical power supply, said series circuit having a coil, an electrical switching means having main electrodes and a control electrode and a unidirectional semiconductor element connected in forward direction between said coil and one of the main electrodes of said switching means; (b) control means for applying signals to said control electrode of said switching means to render said switching means alternately conductive and non-conductive; and (c) a light-emitting member having a first terminal connected to a junction point between said coil and said unidirectional semiconductor element and a second terminal connected to a main electrode of said switching means, the inductance value of said coil and the capacitance value of said light-emitting member being selected to effect resonance and application of a voltage to said electro-luminescence means in excess of said terminal voltage of said electrical power supply.
Claim 14
Dependent Claim
165 words
A driving device for use with an electrical power supply having a given terminal voltage for electro-luminescence, comprising: (a) a series circuit for connection to said electrical power supply, said series circuit having a coil, an electrical switching means having main electrodes and a control electrode and a unidirectional semiconductor element connected in forward direction between said coil and one of the main electrodes of said switching means; (b) control means for applying signals to said control electrode of said switching means to render said switching means alternately conductive and non-conductive; and (c) a light-emitting member having a first terminal connected to a junction point between said coil and said unidirectional semiconductor element and a second terminal connected to a main electrode of said switching means, the inductance value of said coil and the capacitance value of said light-emitting member being selected to effect resonance and application of a voltage to said electro-luminescence means in excess of said terminal voltage of said electrical power supply.
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) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |