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:
Jan. 06, 2009
Filed:
May. 16, 2005
Ryuji Shinohara, Kanagawa, JP;
Hideki Kaneiwa, Kanagawa, JP;
Atsushi Matsunaga, Kanagawa, JP;
Yoshio Ishii, Kanagawa, JP;
Ryuji Shinohara, Kanagawa, JP;
Hideki Kaneiwa, Kanagawa, JP;
Atsushi Matsunaga, Kanagawa, JP;
Yoshio Ishii, Kanagawa, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A control apparatus for an optical density changing element comprising: an electromotive force generating element comprising an electromagnetic wave sensor (example: phototransistor) and a voltage source (example: battery), wherein the electromotive force generating element generates an electromotive force; an optical density changing element (light regulating filter) including an electrochromic material driven by the electromotive force; and a resistor connected in parallel to the optical density changing element.