Adjustable-aspect video projection screen

Details Adjustable-aspect video projection screen Adjustable-aspect video projection screen

1996-09-17

1998-04-07

Malley, Daniel P.

Optical: systems and elements

Projection screen

Border, mask, shade, or curtain

359443, 359460, 348836, 348841, H04N 564

Patent

active

057371237

ABSTRACT:
An adjustable-aspect ratio video projection viewing screen assembly has a screen portion that is basically proportioned as a widescreen, e.g. with 16:9 aspect ratio, but is convertible to a second aspect ratio, e.g. regular 4:3 aspect ratio, by means of a pair of telescopic side panel assemblies, each having a fixed portion extending outwardly beyond the side edge of the widescreen, and a movable portion that can be located in front of the fixed portion for widescreen viewing or moved inwardly to cover the void side margins for viewing at regular aspect ratio. The fixed portions also serve as stereo speaker baffle boards, the movable panels being made acoustically transparent. The movable panels may be adjusted manually or can be fitted with an electrical power mechanism controlled manually or controlled automatically from an aspect mode control signal originating from the video projection system. All four panels are typically covered with matching grille cloth. The unit may be wall-mounted or may stand alone, supported by a pedestal, tripod or overhead suspension.

REFERENCES:
patent: 4951149 (1990-08-01), Faroudja
patent: 5166802 (1992-11-01), Thiele et al.
patent: 5343257 (1994-08-01), Kohno et al.
patent: 5523880 (1996-06-01), Pidgeon et al.
patent: 5526066 (1996-06-01), Kikuchi

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