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. 01, 2008
Filed:
Jan. 30, 2006
Yoshiaki Hata, Ashiya, JP;
Kazumi Sugitani, Sakai, JP;
Ryuichi Yoshida, Sakai, JP;
Shuichi Fujii, Matsubara, JP;
Hideaki Nakanishi, Mishima-gun, JP;
Takayuki Hoshino, Osaka, JP;
Hirohisa Sueyoshi, Sakai, JP;
Yoshiaki Hata, Ashiya, JP;
Kazumi Sugitani, Sakai, JP;
Ryuichi Yoshida, Sakai, JP;
Shuichi Fujii, Matsubara, JP;
Hideaki Nakanishi, Mishima-gun, JP;
Takayuki Hoshino, Osaka, JP;
Hirohisa Sueyoshi, Sakai, JP;
Konica Minolta Opto, Inc., Hachioji-Shi, JP;
Abstract
A drive unit in accordance with the present invention is provided with a magnetic field generating member generating a magnetic field, a magnetic field detecting device constituted by first, second and third magnetic field detecting elements detecting the magnetic field, and a piezoelectric actuator moving the magnetic field generating member. When executing a relative positioning between the magnetic field generating member and the magnetic field detecting device on the basis of a detection result by the magnetic field detecting device, a first positioning is executed on the basis of the detection result of the first and second magnetic field detecting elements in a predetermined region, and a second positioning is executed on the basis of the detection result of the third magnetic field detecting element at a predetermined point apart from the predetermined region, within a movable range in which the magnetic field generating member moves. In accordance with the structure, it is possible to position the movable body at a high precision, even in the case that a plurality of position detecting points of the movable body of the drive unit exist at a wide interval.