Electronic camera and automatic focusing method,申请号EP20050254154-传众专利搜索

Electronic camera and automatic focusing method

申请公布号：EP1613062(A1)

申请号：EP20050254154

申请日期：2005.07.01

申请公布日期：2006.01.04

申请人：

SONY CORPORATION

发明人：SATOSHI, TAKEMOTO

分类号：H04N5/232

主分类号：H04N5/232

摘要：The present invention provides an electronic camera adapted to perform an accurate auto focus control operation at high speed. The electronic camera comprising a C-MOS image sensor, a lens section having a focusing lens, a wobbling control section for generating a wobbling control signal for causing the focusing lens to do a wobbling operation of repeating a series of operations including a near side drive operation of driving the focusing lens to move to the near side, a near side stop operation of stopping the focusing lens at the near side, a far side drive operation of driving the focusing lens to move to the far side and a far side stop operation of stopping the focusing lens at the far side at every 2 × n field periods, an estimated in focus value computing section for generating an estimated in focus value to indicate the degree of in focus of the image of the object of shooting, an in focus direction determining section for computing the quantity of change in the estimated in focus value during the wobbling operation and determining the direction to be followed by the focusing lens to become in focus on the basis of the quantity of change, and a drive section for driving the focusing lens to move and become in focus and driving the focusing lens based on the wobbling control signal. The wobbling control section is adapted to generate the wobbling control signal so as to make the central timing in the time period of exposure to light of the central pixel of the predetermined range in the image substantially agree with the central timing of the period of the near side stop operation and that of the period of the far side stop operation.