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:
May. 10, 2016
Filed:
Nov. 27, 2014
Hon Hai Precision Industry Co., Ltd., New Taipei, TW;
Yu-Han Chen, New Taipei, TW;
HON HAI PRECISION INDUSTRY CO., LTD., New Taipei, TW;
Abstract
A driving system for an SMA based actuator having SMA wires or rods includes a capture module, a determination module, and four drive modules. The capture module captures current position of a lens module from a position sensor. The displacement difference between the current position and a target position is determined. The first drive module can rapidly or slowly increase the current to the SMA, or rapidly or slowly decrease the current to the SMA, causing fast or slow movement of a lens module in one direction or fast or slow movement in the opposite direction, to achieve the desired auto-focus of a camera module.