Device for displaying data in camera viewfinder

Details Device for displaying data in camera viewfinder Device for displaying data in camera viewfinder

1984-01-30

1985-12-24

Mathews, A. A.

3542891, 350345, G03B 1302, G03B 1720

Patent

active

045602646

ABSTRACT:
A camera viewfinder which includes a device for displaying data, such as shutter speed and aperture value. A liquid crystal display and associated illuminating systems are provided for the display device. The illuminating system includes an illuminating lamp and a diffusion plate for diffusing light from the lamp. The diffusion plate has a groove or hole at its center for accommodating the lamp and a flat surface facing the liquid crystal display. The surface of the diffusion plate opposite the flat surface has sloping sides which slope downward from the center of the diffusion plate.

REFERENCES:
patent: 3994564 (1976-11-01), Somogyi
patent: 4043636 (1977-08-01), Eberhardt et al.
patent: 4051503 (1977-09-01), Uno et al.
patent: 4059916 (1977-11-01), Tachihara et al.
patent: 4229783 (1980-10-01), Eberhardt
patent: 4285029 (1981-08-01), McCoy
patent: 4429979 (1984-02-01), Terada
patent: 4465355 (1984-08-01), Murakami et al.

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