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1. (WO2007109614) écran absorbant la lumière ambiante
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS
What is claimed is:

1. A projection screen (600) for receiving projector light (30) from a projector facing direction, the screen comprising:
a substrate (502) having a plurality of features (504), each of the features including a reflective surface (504) oriented to the projector facing direction, each of the reflective surfaces being curved in a first
direction (510) to provide a desired horizontal viewing angle, and
curved in a second direction (504) to provide a desired vertical
viewing angle.

2. The projection screen of claim 1 , wherein each of the features is an arched conic section having a base (514) and the reflective surface, and wherein the reflective surface extends from the base to a tip (516) of the conic section.

3. The projection screen of claim 2, wherein the base of each of the features is an absorptive surface that is oriented substantially perpendicular to a plane of the projection screen.

4. The projection screen of claim 1 , and further comprising a plurality of absorptive recesses (506) formed in the substrate.

5. The projection screen of claim 4, wherein each of the absorptive recesses includes a plurality of light absorbing surfaces (518), and wherein the plurality of features are separated from each other by the plurality of absorptive recesses, and wherein the plurality of features and the plurality of recesses are uniformly positioned in two dimensions across a surface of the substrate.

6. The projection screen of claim 5, wherein each of the absorptive recesses is generally pyramidal in shape.

7. The projection screen of claim 1 , wherein the plurality of features is formed on a hexagonal grid.

8. The projection screen of claim 1 , wherein the substrate is fabricated of a light-absorbing material, and the reflective surfaces are formed by depositing light-reflective material at a glancing angle onto the substrate.

9. The projection screen of claim 1 , wherein the plurality of features have an average feature length and width in a range from about 75 microns to 500 microns.

10. A method of creating a projection screen (600), comprising:
forming a plurality of features (504) on an absorptive substrate (502), each feature including a first surface (504) curved in a first
direction (510) to provide a desired horizontal viewing angle, and curved in a second direction (504) to provide a desired vertical viewing angle;
forming a plurality of absorptive recesses (506) in the substrate
positioned between the plurality of features; and
depositing a reflective material (706) on the first surface of each of the features.