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. 26, 2021
Filed:
Apr. 16, 2020
Samsung Electro-mechanics Co., Ltd., Suwon-si, KR;
Jung Eun Youm, Suwon-si, KR;
Samsung Electro-Mechanics Co., Ltd., Suwon-si, KR;
Abstract
An actuator of a camera module includes a comparison unit sequentially calculating each error value by comparing a target position with a current position of a lens barrel, a controller integrated circuit (IC) generating a control signal by applying a control gain based on a proportional-integral-derivative (PID) control scheme to each error value sequentially input thereto from the comparison unit, and a driving circuit unit generating a driving signal in response to the control signal to move the lens barrel to the target position, wherein the controller IC changes the control gain in response to the error values sequentially input including both overshoot and undershoot.