Title:
LENS DEVICE, PROJECTION TYPE DISPLAY DEVICE USING THE SAME, AND LENS DEVICE CONTROL METHOD
Document Type and Number:
Japanese Patent JP2016114667
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a lens device that can further reduce an influence depending on the state of use, and a projection type display device using the same.SOLUTION: A lens device β comprises a zooming moving unit 8 and a cam barrel 6 that has a cam groove engaging with a cam follower 7, and further a motor 4 that rotates the cam barrel and a lens substrate 3 that controls the motor 4. The lens substrate 3 controls at least the amount of a current to be supplied to a motor 4 and time to supply a current to the motor 4 according to the angle of the cam groove at the position of the cam follower 7.SELECTED DRAWING: Figure 4
Inventors:
TANAKA JUNICHI
Application Number:
JP2014251266A
Publication Date:
June 23, 2016
Filing Date:
December 11, 2014
Export Citation:
Assignee:
CANON KK
International Classes:
G02B7/08; G03B21/00; G03B21/14
Attorney, Agent or Firm:
Takuma Abe
Sogo Kuroiwa
Sogo Kuroiwa