Drive control apparatus of lens housing for camera
US5640616A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Oct 19, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/04
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.