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. 27, 2018
Filed:
Mar. 09, 2017
Lg Electronics Inc., Seoul, KR;
Haejin Park, Seoul, KR;
Sungdu Kwon, Seoul, KR;
Youngman Kwon, Seoul, KR;
Jayong Lee, Seoul, KR;
Taegil Cho, Seoul, KR;
Salkmann Ji, Seoul, KR;
Samnyol Hong, Seoul, KR;
LG ELECTRONICS INC., Seoul, KR;
Abstract
Disclosed are an apparatus and method for controlling auto focus of a camera module. The present invention includes a lens unit, a moving coil, a fixed coil, and a controller configured to provide a signal comprising first frequency signal and second frequency signal to the moving coil, the fixed coil receiving a variable current or a variable voltage through the second frequency signal, calculate a focus location value based on the received variable current or variable voltage and an image signal, and control the lens unit to move by applying the first frequency signal to the moving coil according to the calculated focus location value, the second frequency signal is higher than the first frequency signal and is comprised of the signal during a prescribed time.