Focus state display device for camera
US5361119A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1993 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Nov 3, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is disclosed a focus state display device, adapted for use in a camera which has plural focus detection areas in the phototaking image field and effects focusing in one area (focusing area) selected from such plural focus detection areas. The device has a display with two different display modes, and displays the focusing area in one display mode when the lens of the camera is in an infocus state to the object in the focusing area, and in the other display mode when the lens is in an out-of-focus state to the object in the focusing area. In another embodiment, the device has a display with three different display modes, and displays the focusing area by a display mode and other focus detection areas (namely nonfocusing areas) by two other display modes depending on whether the object in respective area is in focus or out of focus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.