Drive control apparatus of lens housing for camera

Details Drive control apparatus of lens housing for camera Drive control apparatus of lens housing for camera

1995-10-19

1997-06-17

Blankenship, Howard B.

Photography

Having variable focal length of camera objective

Power zoom

396 87, G03B 118

Patent

active

056406169

ABSTRACT:
A drive control apparatus of lens housing for camera, comprises a camera body, a lens housing, a drive unit, signal generating means and a control unit. The position detection of the lens housing is carried out only at a single reference position, and in each processing for moving the lens housing, the control for moving the lens housing to a first, second or third position is carried out based upon this single reference position after the lens housing is once moved to the reference position to execute position detection. According to the drive control apparatus of the present invention, it is possible to achieve a possibility of occurrence of detection error which is lower than those with conventional one requiring the position detection at at least three positions.

REFERENCES:
patent: 4864338 (1989-09-01), Wakabayashi
patent: 5255035 (1993-10-01), Kichima
patent: 5486888 (1996-01-01), Shiina et al.

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