US3611022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power control circuit
Assignee: Lockheed Martin Corp
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Filing: 1969-09-05
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Granted: 1971-10-05
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Expires: 1989-09-05
Abstract
Abstract A power control system incorporating a silicon-controlled rectifier for selectively applying electrical power to an electroluminescent device so as to cause illumination thereof. The silicon-controlled rectifier is selectively switched between its nonconducting and conducting state by a controlled bilevel signal applied to the cathode and by selectively controlling the bias values, the silicon-controlled rectifier will have a 360* conduction angle thereby applying maximum power to the electroluminescent device.
Inventors
- 👤 Wayne F Galusha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:48
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/1555; H05; H05B; H05B44/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
37 words
The combination as defined in claim 1 wherein said rectifier device comprises a silicon-controlled rectifier, said first electrode being the anode electrode, said second electrode being the gate electrode, and said third electrode being the cathode electrode.
Claim 2
Dependent Claim
14 words
The combination as defined in claim 1 wherein said load comprises an electroluminescent device.
Claim 3
Dependent Claim
36 words
The combination as defined in claim 1 wherein said circuit means provides a first and a second signal, said rectifier device being in said conducting state when said first signal is applied to said third electrode.
Claim 4
Dependent Claim
80 words
A power control circuit as defined in claim 1 wherein said circuit means includes a resistive element, said resistive element being large compared to said low impedance path, said resistive element determining the value of bias current supplied by said bias means; and the value of said resistive element, said bias current, said low impedance path, and said first signal, being adjusted in concert to cause said rectifier to conduct a forward or reverse current appearing at said first electrode.
Claim 5
Dependent Claim
193 words
An electroluminescent display system, comprising: a source of load current having a first and second terminal; a point of reference potential, one of said terminals of said source being connected to said reference potential; at least a first electroluminescent device having a first and second connecting means, the other of said terminals of said source being connected to one of said connecting means; at least a first rectifier device having successive zones of PNPN conductive material, an input electrode connected to an end P zone, an output electrode connected to an opposite N zone, and a control electrode connected to an intermediate P zone, said input electrode being connected to the other of said electroluminescent device connecting means; bias means connected to said control electrode; a low-impedance return path for said load current connected across said control electrode and said reference potential; and at least a first function control means connected to said output electrode for rendering said rectifier device in said conducting and nonconducting states, said load current flowing through said load, said input electrode, said control electrode and said low-impedance return path when said rectifier device is in said conducting state.
Claim 6
Dependent Claim
67 words
The electroluminescent display system as defined in claim 6 further includes a resistive element connected across said output electrode and said function control means, and said resistive element determines the bias current supplied by said bias means; and said function control means provides a first and a second signal, said rectifier device being in said conducting state when said first signal is applied to said resistive element.
Claim 7
Dependent Claim
45 words
The electroluminescent display system as defined in claim 7 wherein the values of said resistive element, said bias current, said low impedance path, and said first signal being adjusted to cause said rectifier to conduct both positive and negative currents appearing at said input electrode.
Claim 8
Dependent Claim
65 words
The electroluminescent display system as defined in claim 6 which includes a plurality of said electroluminescent devices, said rectifier devices and said function control means, wherein one of each of said devices, said rectifier devices and said function control means form a serially connected unit, and each of said serially connected units being connected in parallel to said load current source and said bias means.
Claim 9
Dependent Claim
17 words
The electroluminescent display system as defined in claim 6 wherein said rectifier device is a silicon-controlled rectifier.
References Cited (Backward Citations)
US3371230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |