Title:
【発明の名称】光量制御装置
Document Type and Number:
Japanese Patent JP2746509
Kind Code:
B2
Abstract:
A light quantity control device includes a motor, a light quantity control member arranged to be moved by the motor used as a drive source, a speed detecting part arranged to form speed information by using information on a change of the position of the light quantity control member, a first circuit arranged to generate a first control voltage for the motor, taking the speed information into consideration, and a second control circuit arranged to generate a second control voltage for the motor, the second control voltage being opposite in polarity to the first control voltage and having the same absolute value as the first control voltage.
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Inventors:
SATO OSAMU
Application Number:
JP32954892A
Publication Date:
May 06, 1998
Filing Date:
December 09, 1992
Export Citation:
Assignee:
KYANON DENSHI KK
International Classes:
G03B9/00; G03B9/02; G03B9/60; H04N5/238; (IPC1-7): G03B9/00; G03B9/02; H04N5/238
Domestic Patent References:
| JP6213170A | ||||
| JP32847A | ||||
| JP349484A |
Attorney, Agent or Firm:
Honda Kodaira (3 outside)