Discharge lamp lighting device with a delayed-output...

Details Discharge lamp lighting device with a delayed-output... Discharge lamp lighting device with a delayed-output...

Category

H - Electricity

Subcategory

05

Subsubcategory

B

CPC

315/59

IPC codes

H05B 41/24 (2006.01) H05B 41/36 (2006.01)

Type

Patent

Patent number

CA 1159893

Description

TITLE OF THE INVENTION: DISCHARGE LAMP LIGHTING DEVICE WITH A DELAYED-OUTPUT OSCILLATION CIRCUIT ABSTRACT OF THE DISCLOSURE: A high frequency and high voltage generating circuit for a discharge lamp lighting device controls its initial output at the starting time of a discharge lamp to prevent applying a high voltage to the dis- charge lamp in the "cold cathode" state. The circuit comprises in combination an oscillation circuit having an oscillation capacitor, a nonlinear inductor and a thyristor, and an initial output limiter for delaying the output supply until the lamp filament is suffi- ciently preheated for preventing sputtering and for extending the operational life of the discharge lamp. The output control is formed as a bias circuit for the nonlinear inductor and includes a thermistor with a negative or a positive temperature coefficient. 1511/DIV/ar - 1 -

Application Number

420646

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