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:
Mar. 02, 2010
Filed:
Mar. 28, 2007
Ming-tsan Peng, Hsinchu, TW;
Chun-te Wu, Hsinchu, TW;
Chi-shen Chang, Hsinchu, TW;
Kwen-jin Lee, Hsinchu, TW;
Tzuan-ren Jeng, Hsinchu, TW;
Lei-ming Yang, Hsinchu, TW;
Chau-yuan KE, Hsinchu, TW;
Jau-jiu Ju, Hsinchu, TW;
Shyh-jier Wang, Hsinchu, TW;
Hai-jo Huang, Hsinchu, TW;
Ming-Tsan Peng, Hsinchu, TW;
Chun-Te Wu, Hsinchu, TW;
Chi-Shen Chang, Hsinchu, TW;
Kwen-Jin Lee, Hsinchu, TW;
Tzuan-Ren Jeng, Hsinchu, TW;
Lei-Ming Yang, Hsinchu, TW;
Chau-Yuan Ke, Hsinchu, TW;
Jau-Jiu Ju, Hsinchu, TW;
Shyh-Jier Wang, Hsinchu, TW;
Hai-Jo Huang, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
An optical pickup head and an electromagnetic actuating device thereof are provided. The electromagnetic actuating device is used to move an objective lens carrier having an objective lens assembly to form an optical pickup head. The electromagnetic actuating device includes at least a magnet, at least a coil, and at least a yoke. The magnet is spaced apart from the objective lens carrier by a distance, and the coil is disposed at the objective lens carrier, for generating an electromagnetic force to interact with the magnet. The yoke is spaced apart from the objective lens carrier by a distance, in which the yoke has a protruding part that extends towards the objective lens carrier and is used to attract magnetic flux lines produced by the magnet, and thus making the magnetic flux that passes through the coil be distributed evenly.