Electric lamp and discharge devices: systems – Regulation of the control current and/or potential applied... – Discharge control discharge device in the control circuit
Patent
1985-11-13
1987-03-17
Dixon, Harold
Electric lamp and discharge devices: systems
Regulation of the control current and/or potential applied...
Discharge control discharge device in the control circuit
315194, 315307, 315DIG2, 315DIG4, 315DIG7, H05B 3702
Patent
active
046510605
ABSTRACT:
A dimmer for fluorescent lights utilizes a standard A.C. phase control at normal line A.C. frequencies to control the line power to the standard fluorescent light ballast and thereby control the illumination level of the light. During the "off" time of the A.C. line signal, a high frequency signal is applied to the ballast which supplies additional power through the ballast to the filament of the light but is substantially blocked by the ballast from the discharge portion of the light so does not substantially affect the illuminating output of the light.
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Luciano D. Fraia, "A Method to Achieve Continuous Dimming of Low Pressure Sodium and Other Gas Discharge Lamps" Journal of IES, Jul. 1981, pp. 245-252.
Dixon Harold
Electro Controls Inc.
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