Flash device having flat emission mode

Details Flash device having flat emission mode Flash device having flat emission mode

1996-08-05

1998-09-15

Metjahic, Safet

Photography

With object illumination for exposure

Exposure control circuit with illumination mode

396180, G03B 700

Patent

active

058093508

ABSTRACT:
There is provided a flash device to which a construction for starting a flash emission without depending on the turning-on of an X-sync contact is added without increasing the number of interfaces between a camera body and the flash device. In the flash device, a change of a clock signal inputted next to emission mode data communicated to the flash device through a serial communication line between the camera body and the flash device is detected and recognized as a flash emission start signal, so that flash emission start control is performed without depending on the turning-on of the X-sync contact and without setting a special interface.

REFERENCES:
patent: 4816853 (1989-03-01), Kikukawa et al.
patent: 5283610 (1994-02-01), Sasaki
Patent Abstracts of Japan No. JP63148737, published Jun. 21, 1988, vol. 12, No. 412.
Patent Abstracts of Japan No. JP62071939, published Apr. 2, 1987, vol. 11, No. 270.
Patent Abstracts of Japan No. JP59224831, published Dec. 17, 1984, vol. 9, No. 101.

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