Exposure information indicating device for a camera

Details Exposure information indicating device for a camera Exposure information indicating device for a camera

1977-08-26

1978-05-30

Adams, Russell E.

354 53, 354 60L, G03B 708, G03B 1720

Patent

active

040926524

ABSTRACT:
The analog signal corresponding to the brightness of the object to be photographed is converted into a digital signal by means of an A-D converter while a shutter control means adjust the shutter mechanism in accordance with the digital signal stored in the A-D converter whereby at the same time, a digital information indicating circuit indicates digitally the digital signal stored in the A-D converter. Hereby, the digital information indicating circuit is connected with the timing pulse forming circuit in such a manner that the indication circuit repeats the indication by means of the timing pulse forming circuit with a period allowing the photographer to visually recognize the digital information of the indicating circuit.

REFERENCES:
patent: 3824608 (1974-07-01), Toyoda
patent: 3843249 (1974-10-01), Kitaura
patent: 3895875 (1975-07-01), Kitaura et al.
patent: 3909137 (1975-09-01), Kisanuki
patent: 3928854 (1975-12-01), Sakurada et al.
patent: 3972626 (1976-08-01), Laskowsi
TTL Cookbook, Don Lancaster, 1974, pp. 292-295 and p. 73.
The TTL Data Book, Texas Instruments, 1976, pp. 7-115.

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