Camera system of detachable lens unit

Details Camera system of detachable lens unit Camera system of detachable lens unit

2006-12-18

2009-12-22

Perkey, W B (Department: 2862)

Photography

With power supply detail

Power distribution management

C396S532000, C348S211140, C348S333040

Reexamination Certificate

active

07636521

ABSTRACT:
When an UNREG voltage is equal to or less than a PREEND voltage, a notification for informing this state is sent from a lens-side CPU of a lens unit to a body-side CPU of a camera body by UART communication. At this time, the body-side CPU displays a warning, which informs that remaining battery is small, on an LCD. When the UNREG voltage is equal to or less than an END voltage, a notification for informing this state is sent to the body-side CPU25by the UART communication. At this time, the lens-side CPU waits until the body-side CPU turns off a power supply of the lens unit. The body-side CPU stops supplying electricity to the lens unit and displays a warning, which informs that the battery runs out, on the LCD. After that, the body-side CPU turns off a power supply of the camera body.

REFERENCES:
patent: 4782393 (1988-11-01), Kawamura
patent: 7496292 (2009-02-01), Watanabe
patent: 6-178178 (1994-06-01), None
patent: 2001-066489 (2001-03-01), None
patent: 2002-72052 (2002-03-01), None

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