Lens driving device

Details Lens driving device Lens driving device

1994-11-22

1997-07-29

Adams, Russell E.

Photography

Having variable focal length of camera objective

Power zoom

396 81, 396 85, 396 72, 396280, G03B 118, G03B 300, G03B 1318

Patent

active

056529236

ABSTRACT:
The present invention provides a lens driving device, such as an automatic focusing device, which is arranged to detect a difference (the amount of overrun) between a given target amount of driving of a lens and an amount in which the lens is actually driven in a lens driving cycle, correct the next target amount of driving of the lens according to data formed by the accumulation of difference information on the detected difference, and drive the lens by the target amount corrected in this manner, thereby effecting lens driving which takes the past amount of overrun into account.

REFERENCES:
patent: 5057859 (1991-10-01), Ishimaru
patent: 5210562 (1993-05-01), Miyazawa et al.
patent: 5359381 (1994-10-01), Miyazawa et al.
patent: 5416559 (1995-05-01), Uenaka

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