Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1990-07-27
1991-08-13
Mis, David
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
315308, 315DIG5, H05B 4136
Patent
active
050399217
ABSTRACT:
A discharge lamp lighting apparatus according to this invention includes an inverter circuit for supplying a high frequency power source to a discharge lamp having one of different ratings, a voltage detecting coil of an inverter transformer for detecting a load voltage applied from the inverter circuit to the discharge lamp, a current transformer for detecting a load current supplied from the inverter circuit to the discharge lamp, and a control section and an oscillation circuit for controlling the power source supplying operation of the inverter circuit based on detection outputs of the voltage detection coil and current transformer. The control section and oscillation circuit sequentially raise an output of the inverter circuit at the starting time of the discharge lamp, identifies the type of the discharge lamp according to the starting voltage at the lighting time of the discharge lamp, and controls the starting voltage and current of the discharge lamp according to the type of the discharge lamp thus identified.
REFERENCES:
patent: 4958108 (1990-09-01), Jorgensen
Mis David
Toshiba Lighting and Technology Corporation
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