Shutter for display device of projection type

Details Shutter for display device of projection type Shutter for display device of projection type

1996-05-29

1997-11-25

Dowling, William

Optics: image projectors

Shutter

G03B 2114

Patent

active

056904070

ABSTRACT:
A shutter has a cylindrical take-up member rotatable about the central shaft thereof, and a thin board having one end portion thereof fixed to the outer peripheral surface of the take-up member and deformable into a state rolled on the outer peripheral surface of the take-up member and having a spring force for returning to a flat state. The thin board is capable of operating between a liberating position in which in conformity with the rotated position of the take-up member, it is rolled onto the take-up member and retracts from a predetermined optical path to thereby permit the passage of light in the optical path and an intercepting position in which it is unrolled from the take-up member and assumes a flat shape and protrudes into the predetermined optical path to thereby intercept the light.

REFERENCES:
patent: 5112123 (1992-05-01), Fagan
patent: 5121984 (1992-06-01), Jones et al.

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