The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1998
Filed:
Sep. 19, 1996
Kazuo Hashimoto, Kanagawa, JP;
Hirokazu Nakayoshi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
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.