Cold-cathode fluorescent lamp lighting device

Details Cold-cathode fluorescent lamp lighting device Cold-cathode fluorescent lamp lighting device

1996-09-19

1998-04-21

Hecker, Stuart N.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

315DIG7, H02M 7538, H05B 3702

Patent

active

057424977

ABSTRACT:
A cold-cathode fluorescent lamp lighting device which enables to perform high-efficiency lighting of a cold-cathode fluorescent lamp. The direct-current voltage is converted into the alternating voltage by the voltage converting means, and when the alternating voltage is boosted to the stated high-tension alternating voltage by the transforming means, the ratio of step-up transformation by the transforming means with respect to the alternating voltage is adjusted by the change-over means, so that the alternating voltage is boosted into the first high-tension alternating voltage at the time to start lighting of the cold-cathode fluorescent lamp, and the alternating voltage is boosted into the second high-tension alternating voltage at the time of steady-state lighting of the cold-cathode fluorescent lamp, therefore the first high-tension alternating voltage and the second high-tension alternating voltage of the voltage values which are respectively needed, as the minimum requirements, at the time to start lighting and the time of steady-state lighting of the cold-cathode fluorescent lamp can be obtained with the simple circuit constitution, in this way, a cold-cathode fluorescent lamp lighting device which is capable of high-efficiency lighting of a cold-cathode fluorescent lamp can be realized.

REFERENCES:
patent: 5019749 (1991-05-01), Ito
patent: 5105127 (1992-04-01), Lavaud et al.
patent: 5495405 (1996-02-01), Fujimura et al.

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