Camera system
US5049917A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1989 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | May 23, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/243
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is disclosed a camera system consisting of accessories such as a speed light, a data back etc. and a camera capable of mounting these accessories, and capable of data communication between the camera and the accessory. When the power supply of the camera is turned off, a power supply activating signal is sent as a hardware signal from the accessory to the camera by the manipulation of the accessory. When the power supply of the camera is turned on, a power supply extending signal is sent as a software signal from the accessory to the camera by the manipulation of the accessory. The camera holds the operation of the power supply for a predetermined period from the latest entry of the power supply activation signal or the power supply extending signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.