Viewfinder for autofocus cameras

Details Viewfinder for autofocus cameras Viewfinder for autofocus cameras

1984-12-24

1985-12-10

Perkey, William B.

354409, 354225, 3542891, G03B 1316

Patent

active

045575789

ABSTRACT:
An autofocus camera has an optical viewfinder for composing a scene to be photographed, and an autofocus frame in the viewfinder for framing the focus (main) subject in the scene. Electrically activated means, such as a plurality of light emitting diodes (LED's), are provided for highlighting the autofocus frame, especially in a dim or moderate light situation, to prominently call attention to whether or not the focus subject is within the autofocus frame. Manually operated means, including a shutter release, activate the highlighting means before the scene can be photographed.
In a preferred embodiment, the autofocus frame includes a plurality of indicator marks disposed in spaced relation about the center of the viewfinder. The LED's are arranged in the viewfinder to be seen at the respective spaces between the indicator marks. When the shutter release is partially depressed, the LED's combine with the indicator marks to define the autofocus frame, thereby highlighting such frame.

REFERENCES:
patent: 4104651 (1978-08-01), Matsumoto
patent: 4114994 (1978-09-01), Kondo
patent: 4300826 (1981-11-01), Aoki et al.
patent: 4354754 (1982-10-01), Takahashi et al.
patent: 4367463 (1983-01-01), Suzuki et al.
patent: 4374612 (1983-02-01), Matsumura

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