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US 2003/0197932 A1Published application
Reflection-type projection screens
AssigneeNone recorded
InventorHoward Sinkoff
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AssigneeNone recorded
InventorHoward Sinkoff
Estimating the term…
A projection screen comprising; a substrate having a generally flat forward surface; a diffusion layer formed of a plurality of generally equally spaced apart concave features forming micro lenses; a layer of reflective material deposited on a rearward facing surface of the diffusion layer; the diffusion layer laminated to the forward facing surface of the substrate so that the layer of reflective material is sandwiched therebetween.
A projection screen comprising;
A projection screen comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Characterised by the nature of the surface: lenticular screens
Projection screens: characterised by the nature of the surface
Apparatus or arrangements for taking photographs or for projecting or viewing them
Term end not estimated
1. Field of the Invention
This invention relates to reflection-type projection screens. More particularly, the invention relates to reflection-type projection screens having excellent reflection directivity in the horizontal and vertical directions yet which produce a reflected image having superior gain contrast.
2. Description of the Prior Art
FIG. 1 is a cross-sectional, elevational, exploded view of a generalized embodiment of the invention.
FIG. 2 is a cross-sectional, elevational, exploded view of an alternative embodiment of the invention.
FIG. 3 is a perspective, partial cutaway, view of the alternative embodiment shown in FIG. 2.
Referring now to the drawings, the screen of the first embodiment of the invention is indicated by the reference numeral 10 and includes a substrate 15, which may be planar or curved depending upon the requirements of the particular application, and which, in the preferred embodiment, is of the rigid foam core variety with plastic sheet panels on both sides for rigidity. Although the screen of this invention can be used for any front projected image, it is particularly suitable for use with LCD projection or DLP and the like projection systems. The substrate is commonly found in, and is preferably in, the thickness range of between ¼ inch and 2 inches. The thickness of the substrate 15 is dictated by such parameters as strength requirements for a given size of screen, the environment in which the screen will be used, etc. The substrate defines a forward-facing or front surface 17
A reflective, preferably metalized, film layer 20 is included, which defines a forward facing, reflective, surface 22 and a rear surface 24 adapted to be connected to or placed adjacent to, surface 17 of substrate 15.
A light diffusing layer 30 is employed which sandwiches the reflective layer 20 between light diffusing layer 30 and front surface 17 of substrate 15. Layer 30 defines a forward facing surface 32 and a rear facing surface 34. Rear surface 34 is disposed adjacent to forward surface 22 of reflective layer 20.