View finder device having liquid crystal cell

Details View finder device having liquid crystal cell View finder device having liquid crystal cell

1978-08-07

1981-11-10

Hix, L. T.

354 23D, 354 60E, 354289, 350 33B, G03B 1720, G02F 113

Patent

active

042994624

ABSTRACT:
By providing a liquid crystal cell nearly at the position of the clear vision of the view finder optical system together with a means for masking the display part of the liquid crystal cell the noise appearing on the boundary between the display part and the object view field is eliminated while the invasion of dusts is avoided, whereby further by means of the liquid crystal cell the alarm for the improper exposure, the alarm of the consumption of the power source battery and so on are displayed besides the photographic informations.

REFERENCES:
patent: 3727527 (1973-04-01), Borowski et al.
patent: 3820132 (1974-06-01), Linder
patent: 3961348 (1976-06-01), Miyazaki
patent: 3979743 (1976-09-01), Moore
patent: 4051503 (1977-09-01), Uno et al.
patent: 4090207 (1978-05-01), Mashimo et al.
patent: 4140378 (1979-02-01), Suzuki et al.
patent: 4142786 (1979-03-01), Suzuki et al.

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