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US 11,226,548 B2Granted
Polarizing preserving front projection screen with protrusions
AssigneeRealD Inc.
InventorChing-Chin Wu
Life of this patent
Estimating the term…
Abstract
A projection screen for diffusing illumination light into a range of viewing angles is formed by depositing a coating on a substrate. Within the coating are particles having an average particle height. Protrusions at least two microns higher than the average particle height may be substantially uniformly distributed over the screen. In some embodiments, each protrusion may be no closer than 80 microns to another protrusion.
Claims20
A front projection screen for diffusing illumination light into a range of viewing angles, the front projection screen comprising:
- a substrate;
- a plurality of particles deposited on a surface of the substrate to form a coating, the plurality of particles in the coating having an average particle height measured from the surface of the substrate;
- and
- a plurality of protrusions among the plurality of particles, each protrusion in the plurality of protrusions having a height measured from the surface of the substrate that is at least two microns higher than the average particle height, wherein the height of each protrusion exceeds the average particle height.
1 more element
A projection system comprising:
- a front projection screen comprising:
- a substrate;
- a plurality of protrusions formed on the substrate;
- a plurality of particles deposited on the substrate to form a coating, the plurality of particles in the coating having an average particle height,
- wherein each protrusion in the plurality of protrusions has a height that is at least two microns higher than the average particle height, wherein the height of the protrusions exceeds the average particle height;
- and
- a light projector directing light toward the coating on the substrate.
4 more elements
A front projection screen comprising:
- a substrate;
- a plurality of protrusions formed on the substrate;
- and
- a plurality of particles deposited on a surface of the substrate to form a coating, the plurality of particles in the coating having an average particle height measured from the surface of the substrate,
- wherein each protrusion in the plurality of protrusions has a height measured from the surface of the substrate that is at least two microns higher than the average particle height, and
- wherein the height of the protrusions exceeds the average particle height.
3 more elements
Dependencies are inferred from the claim text.