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:
Jun. 17, 2008
Filed:
Jun. 15, 2006
Koji Takahasi, Yokosuka, JP;
Toshiyuki Hiraoka, Numazu, JP;
Noriyuki Kitamura, Hadano, JP;
Naoko Iwai, Yokohama, JP;
Kazuyuki Uratani, Tokyo, JP;
Shinji Nogi, Tokyo, JP;
Toru Ishikita, Yokosuka, JP;
Isao Yamazaki, Tokyo, JP;
Koji Takahasi, Yokosuka, JP;
Toshiyuki Hiraoka, Numazu, JP;
Noriyuki Kitamura, Hadano, JP;
Naoko Iwai, Yokohama, JP;
Kazuyuki Uratani, Tokyo, JP;
Shinji Nogi, Tokyo, JP;
Toru Ishikita, Yokosuka, JP;
Isao Yamazaki, Tokyo, JP;
Toshiba Lighting & Technology Corporation, Tokyo, JP;
Abstract
A fluorescent lamp lighting apparatus according to the present invention comprises an initial illuminance correction control circuit which sets a fluorescent lamp to an initial illuminance correction control lighting mode, a switching portion which changes the fluorescent lamp from the initial illuminance correction control lighting mode to an external control dimming mode when a predetermined external dimming signal is detected, and a control portion which gradually dimming so as to achieve a dimming level of a switched mode when switching the initial illuminance correction control lighting mode and the external control dimming mode, and control so as to achieve a dimming level corresponding to a cumulative lighting time of the fluorescent lamp when the changed mode is the initial illuminance correction control lighting mode.