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. 03, 2007
Filed:
Mar. 28, 2005
Shinichi Niwa, Iwata-gun, JP;
Toshiaki Asakawa, Iwata-gun, JP;
Shigeyuki Adachi, Iwata-gun, JP;
Kuniyuki Takao, Iwata-gun, JP;
Shinichi Niwa, Iwata-gun, JP;
Toshiaki Asakawa, Iwata-gun, JP;
Shigeyuki Adachi, Iwata-gun, JP;
Kuniyuki Takao, Iwata-gun, JP;
Minebea Co., Ltd., Nagano, JP;
Abstract
There is provided a color wheel including a plurality of color filters arranged so as to form a disk, and a retainer member disposed at a center of the disk and formed into a C-ring defining an open mouth portion through which an area of one color filter is exposed. Also, there is provided a color wheel assembly which incorporates the color wheel described above, and which further includes a motor to rotate the color wheel, and a rotational position detector to optically detect a rotational position of the color wheel. Detection light emitted from the detector is set to fall incident on the C-ringed retainer member while the color wheel is rotated thus intermittently impinging on the open mouth portion, namely on the one color filter, which causes the detection light reflected thereby to come out with two different intensities that are sensed by the detector.