PROJECTION SCREENS

• US 3,622,223 A
• Filed: 01/16/1970
• Issued: 11/23/1971
• Est. Priority Date: 01/16/1970
• Status: Expired due to Term

• Current Assignee: Gordon R. Brakell
• Original Assignee: Gordon R. Brakell
• Inventors: Brakell, Gordon R.
• Primary Examiner(s): Prince, Louis R.
• Assistant Examiner(s): Corr, Denis E.
• Application Number:
  US05/003,471
• Time in Patent Office: 676 Days
• Field of Search: 350/129,128,127 52/478 204/19
• US Class Current: 359/459
• CPC Class Codes: G03B 21/602 Lenticular screens G03B21/625 takes precedence

Abstract

A projection screen suitable for indoor or outdoor use, the screen being installed as a permanent fixture and consisting of individual reflective sheet metal sheets or tiles fixed in overlapping relationship to form the screen to desired width and height dimensions. Each sheet or tile is embossed with convex reflective surfaces to directionally reflect light from a projection whereby the screen, when formed from a desired number of sheets or tiles, reflects light from a projection within predetermined angles.

Claims

1. A projection screen for use primarily in an outdoor theater, said screen formed of a plurality of individual reflective metal tiles each embossed with light reflective elements of a minute size not resolvable to the eye of observers and which direct incident light toward an audience viewing said screen, a support on which said tiles are individually mounted, said tiles being movable individually on said support under the influence of expansion and contraction, said tiles also being of small edge dimensions compared to the edge dimensions of said screen.

2. A reflective metal tile according to claim 1, said tile having two adjacent sides thereof stepped downwardly from the adjacent row of reflective elements and blended into flat side flanges, said tile also having spaced slots formed through the stepped parts between said flanges and the adjacent rows of reflective elements, and said tile further having tongues formed on the remaining two sides thereof opposite said slots and of less width than the slots.

3. A reflective metal tile according to claim 1 embossed with contiguous convex light reflecting elements which reflect the light from a film projector within an angle of 50* on either side of a vertical bisector of a screen composed of such tiles and within an angle of 30* with reference to the horizontal bisector of the said screen.