Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Discharge device and/or rectifier in the cathode or heater...
Patent
1989-05-03
1991-06-11
Pascal, Robert J.
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
Discharge device and/or rectifier in the cathode or heater...
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.
Horii Shigeru
Ito Kazuhiko
Kichibayashi Masakatsu
Miyazaki Kouji
Ozawa Masataka
Matsushita Electric - Industrial Co., Ltd.
Pascal Robert J.
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