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:
Aug. 10, 2010
Filed:
Dec. 01, 2000
Seiichi Hosoda, Hino, JP;
Masahide Yamaki, Hachioji, JP;
Katsushi Watanabe, Hachioji, JP;
Hiroshi Takahashi, Hachioji, JP;
Masakazu Gotanda, Kanagawa, JP;
Itaru Osaki, Hachioji, JP;
Takeaki Nakamura, Hino, JP;
Seiichi Hosoda, Hino, JP;
Masahide Yamaki, Hachioji, JP;
Katsushi Watanabe, Hachioji, JP;
Hiroshi Takahashi, Hachioji, JP;
Masakazu Gotanda, Kanagawa, JP;
Itaru Osaki, Hachioji, JP;
Takeaki Nakamura, Hino, JP;
Olympus Corporation, Tokyo, JP;
Abstract
A battery-powered light source devicehas an DC/DC converterthat boosts the supply voltage of a batteryand supplies electrical power to a lamp, and, inside this DC/DC converter, are provided a comparatorthat compares a specific reference voltage to the output voltage of a DC/DC converter, and a control componentthat keeps the output voltage from the DC/DC converterat a specific lamp voltage on the basis of the comparison result of this comparator, whereby the supply voltage of the batteryis boosted and the optimal lamp voltage is obtained. Consequently, the battery-powered light source deviceallows the brightness of the lamp to be adjusted and a high step-up efficiency to be obtained, and the battery can therefore be used more efficiently, and a more convenient use of the endoscope is possible.