Lens driving motor control apparatus

Details Lens driving motor control apparatus Lens driving motor control apparatus

1989-11-24

1990-10-30

Gellner, Michael L.

354400, G03B 310

Patent

active

049672185

ABSTRACT:
A lens driving motor control apparatus comprises a lens barrel which moves a photographing lens system in an optical axis direction, a lens driving motor for driving the lens barrel, a coding means on the lens barrel for coding the position of the lens barrel, a code reading means for reading the code signal of the coding means, a position controlling means for controlling the lens driving motor to control the stop position of the lens barrel in accordance with the code signal which is read by the code reading means, and an abnormal code processing means for controlling the position control means, so that when the code read by the code reading means is abnormal, the code signal is treated as not having been read.

REFERENCES:
patent: 4293206 (1981-10-01), Tokutomi et al.
patent: 4508443 (1985-04-01), Matsuzaki et al.

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