Polarization preserving projection screen with engineered particle and method for making same

US8194315B2 · kind B2 · utility

Assignees

• ReaID Inc. · US
• WAVEFRONT TECHNOLOGY, INC. · US

Inventors

• Gary D. Sharp · Boulder, US
• David A. Coleman · Berea, US
• Joel Mikael Petersen · Burbank, US
• Christopher Chapman Rich · Rancho Palos Verdes, US
• Raymond Jacob Lewandowski · San Diego, US

Key dates

• Filing date: Dec 22, 2010
• Grant date: Jun 5, 2012
• Expiry date: Dec 22, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T156/1052
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Polarization preserving projection screens provide optimum polarization preservation for 3D viewing. The projection screens additionally provide improved light control for enhanced brightness, uniformity, and contrast for both 2D and 3D systems. Generally, the disclosed method for providing a projection screen comprises embossing at least a first side of a first substrate to produce an optically functional material and then cutting the optically functional material into pieces to produce a plurality of engineered particles. The plurality of engineered particles may then be deposited on a second substrate to produce a substantially homogeneous optical appearance of the projection screen.