System for communication between camera and accessory
US5781818A · kind A · utility
15Cited by
5References
42Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 28, 1997 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Apr 28, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2206/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a camera system arranged to communicate data between a camera and an accessory mounted on the camera in synchronism with a clock signal, the lens communicates data to the camera by a first communication method (an open drain method), and, if it is determined as a result of the data communication that the lens mounted on the camera is a lens suited for high-speed communication, the first communication method is switched to a second communication method suited for high-speed communication, so that communication can be performed at a high speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.