Screen

Details Screen Screen

2005-01-04

2005-01-04

Mahoney, Christopher E (Department: 2851)

Optical: systems and elements

Projection screen

Moving during projection

Reexamination Certificate

active

06839168

ABSTRACT:
A screen having a projection surface on which a light beam irradiated by an optical equipment such as a projector is projected to form a projection image has luminous energy sensors (4U,4D,4L,4R) and an attitude controller (70) for controlling the attitude of the projection surface based on the luminous energy detected by the luminous energy sensors (4U,4D,4L,4R), in which, since the luminous energy sensors (4U,4D,4L,4R) and the attitude controller (70) are provided, the attitude of the projection surface can be controllably adjusted by detecting the luminous energy of the projection image from the optical equipment, so that the projection surface of the screen can be correctly positioned relative to the optical equipment, thus automatically correcting trapezoidal distortion etc. of the projection image.

REFERENCES:
patent: 3604937 (1971-09-01), Hahn
patent: 5024494 (1991-06-01), Williams et al.
patent: 5080481 (1992-01-01), Martin et al.
patent: 5548357 (1996-08-01), Appel et al.
patent: 6416186 (2002-07-01), Nakamura
patent: 6507435 (2003-01-01), Bergman

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