Discharge lamp operation apparatus

Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Discharge device and/or rectifier in the cathode or heater...

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Details

315219, 315224, 315307, 315DIG7, H05B 3900

Patent

active

050235168

ABSTRACT:
A discharge lamp apparatus is capable of securely detecting the decrease of emission in the terminal stage of the life of a discharge lamp by connecting a voltage detecting circuit to the discharge lamp, and a discharge lamp apparatus for securely starting, operating and dimming the discharge lamp, and is also capable of protecting the lamp in the event of abnormality; the apparatus includes two timer circuits, a reset circuit, a dimmer circuit, an abnormality detecting circuit, and a stopping circuit.

REFERENCES:
patent: 4647817 (1987-03-01), Fahnrich et al.

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