Shutter speed digital display device for cameras

Details Shutter speed digital display device for cameras Shutter speed digital display device for cameras

1975-10-22

1978-01-03

Adams, Russell E.

354 53, 354 60L, 354 61, G03B 1718

Patent

active

040670236

ABSTRACT:
A shutter speed digital display device for cameras equipped with both automatic and manual shutter speed controls is disclosed. A shutter speed display control circuit generates a first digital signal in accordance with the adjustment of the camera's shutter speed by an automatic shutter speed control circuit. The first digital signal is decoded and used to control a light-transmitting liquid crystal device display. In addition, when the camera is in a manual mode of operation, the first digital signal is compared with a second digital signal related to manually adjusted shutter speed. If the comparisons are equal, a coincidence indicator is energized.

REFERENCES:
patent: 3727527 (1973-04-01), Borowski et al.
patent: 3812503 (1974-05-01), Engelsmann et al.
patent: 3843265 (1974-10-01), Egli et al.
patent: 3895875 (1975-07-01), Kitauva et al.
patent: 3909137 (1975-09-01), Kisanuki
patent: 3928858 (1975-12-01), Sakurada et al.
patent: 3967288 (1976-06-01), Yamamoto

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