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:
Nov. 15, 2011
Filed:
May. 20, 2008
Sung-hoon Kim, Seoul, KR;
Yong-gu Lee, Bucheon-si, KR;
Doo-sik Shin, Suwon-si, KR;
Yeon-jun Lee, Suwon-si, KR;
Sung-Hoon Kim, Seoul, KR;
Yong-Gu Lee, Bucheon-si, KR;
Doo-Sik Shin, Suwon-si, KR;
Yeon-Jun Lee, Suwon-si, KR;
Samsung Electronics Co., Ltd., Maetan-dong, Yeongtong-gu, Suwon-si, Gyeonnggi-do, KR;
Abstract
An auto focus (AF) apparatus and method for a camera that improves the AF action by reducing the number of time and steps required of a conventional apparatus and method. An encoder initial value is detected by measuring an initial position of a lens unit by means of an encoder; matching the measured encoder initial value to an initial position value to which the lens unit is to move while performing the auto focus; performing the auto focus starting from the matched initial position value, and dividing a distance that the lens unit is to cover into sections corresponding to a preset number of steps; detecting an edge value which shows a brightness change for a contour of a subject for as many as the number of the preset steps. The AF is completed by moving the lens unit to a position corresponding to a maximum edge value selected from among the detected edge values.