Title:
DIAPHRAGM AND DIGITAL CAMERA USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2005/094065
Kind Code:
A1
Abstract:
A diaphragm (1) includes: sectors (10-1 to 10-5) for opening/closing an opening (2HL) formed in a substrate (2); an electromagnetic actuator (20) driving the sectors; and control means (25) for controlling drive of the electromagnetic actuator. The control means (25) executes drive control containing a stop step ST for temporarily stopping drive of the sectors (10-1 to 10-5) by the electromagnetic actuator during a process of moving the sectors (10-1 to 10-5) to the position for forming a target diaphragm state. According to the present invention, by the simple configuration that the control means has a stop step for temporarily stopping drive of the sectors by the electromagnetic actuator, it is possible to suppress the noise as compared to the case when the electromagnetic actuator is continuously driven.
Inventors:
OISHI SEIICHI (JP)
KOIZUMI HIROYUKI (JP)
TANAKA EIJI (JP)
TADA SATORU (JP)
TANAKA HIDEKI (JP)
KOIZUMI HIROYUKI (JP)
TANAKA EIJI (JP)
TADA SATORU (JP)
TANAKA HIDEKI (JP)
Application Number:
PCT/JP2005/005145
Publication Date:
October 06, 2005
Filing Date:
March 22, 2005
Export Citation:
Assignee:
SEIKO PRECISION KK (JP)
OISHI SEIICHI (JP)
KOIZUMI HIROYUKI (JP)
TANAKA EIJI (JP)
TADA SATORU (JP)
TANAKA HIDEKI (JP)
OISHI SEIICHI (JP)
KOIZUMI HIROYUKI (JP)
TANAKA EIJI (JP)
TADA SATORU (JP)
TANAKA HIDEKI (JP)
International Classes:
G03B9/02; G03B9/06; H04N5/238; H04N101/00; (IPC1-7): H04N5/238; G03B9/02
Foreign References:
| JP2004023502A | 2004-01-22 | |||
| JPH10136693A | 1998-05-22 |
Attorney, Agent or Firm:
Katayama, Shuhei (Tepco Building 6-1 Kyobashi, 1-chome, Chuo-k, Tokyo 31, JP)
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