Electric lamp and discharge devices: systems – Regulation of the control current and/or potential applied... – Discharge control discharge device in the control circuit
Patent
1980-07-07
1982-08-03
La Roche, Eugene
Electric lamp and discharge devices: systems
Regulation of the control current and/or potential applied...
Discharge control discharge device in the control circuit
315200R, 315291, 315312, 340782, H05B 4300
Patent
active
043429475
ABSTRACT:
A light indicating monitoring system includes a plurality of light emitting diodes (LED's) having a common ground connected to a phase controlled silicon controlled rectifier (SCR) circuit. The SCR circuit limits conduction of rectified AC energy through the LED's and through corresponding resistors connected in series with the LED's for limiting the current through the LED's. The SCR circuit thereby provides for operating low DC voltage LED's from a high AC voltage source with a minimum of power and heat generation in the current limiting resistors.
REFERENCES:
patent: 3454865 (1969-07-01), Ellert
patent: 3813664 (1974-05-01), Geyer
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