Title:
IMAGE PICKUP DEVICE AND METHOD FOR CONTROLLING THE SAME
Document Type and Number:
Japanese Patent JP2011164226
Kind Code:
A
Abstract:
To properly control exposure while shortening the time required for driving a diaphragm.
Stop positions of a driving means are decided so that a target aperture value is set when a diaphragm is driven in a direction of opening the aperture or a direction of closing it. Then, the driving amount to the stop position is compared with a predetermined driving amount which is determined to receive an influence from mechanical hysteresis. When the driving amount to the stop position exceeds the predetermined driving amount, the diaphragm is driven only in one direction toward the stop position by using the driving amount to the stop position.
Inventors:
KAZAMI YUSUKE
Application Number:
JP2010024826A
Publication Date:
August 25, 2011
Filing Date:
February 05, 2010
Export Citation:
Assignee:
CANON KK
International Classes:
G03B9/02; H04N5/238; H04N101/00
Domestic Patent References:
| JP2009063702A | 2009-03-26 | |||
| JP2005077758A | 2005-03-24 | |||
| JPS61110124A | 1986-05-28 | |||
| JP2006243372A | 2006-09-14 | |||
| JP2004317666A | 2004-11-11 | |||
| JP2009063702A | 2009-03-26 | |||
| JP2005077758A | 2005-03-24 | |||
| JPS61110124A | 1986-05-28 | |||
| JP2006243372A | 2006-09-14 | |||
| JP2004317666A | 2004-11-11 |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu