Automatic emission device suitable for use as light source, such

Details Automatic emission device suitable for use as light source, such Automatic emission device suitable for use as light source, such

1994-04-20

1997-09-09

Blankenship, Howard B.

Photography

With object illumination for exposure

Activated under low light condition

G03B 700

Patent

active

056665717

ABSTRACT:
The present invention relates to an automatic flash emission device suitable for use as, for example, an automatic flash emission device for a camera. The present invention is to provide an arrangement for detecting the kind of light source which illuminates a scene which is to be photographed (for example, whether tungsten light or a fluorescent lamp), and shifting the threshold of a subject luminance beyond which a flash device performs an automatic emission, thereby enabling the flash device to perform the automatic emission in a form conforming to the kind of light source.

REFERENCES:
patent: 4827119 (1989-05-01), Gaboury
patent: 5109248 (1992-04-01), Petrakos et al.
patent: 5128708 (1992-07-01), Murayama et al.
patent: 5406348 (1995-04-01), Wheeler

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