Patent · US Active

System and method for a projection display system using an optical lightguide

US8157388B2 · kind B2 · utility

7Cited by
10References
19Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 31, 2008
Grant dateApr 17, 2012
Priority date—
Expiry dateOct 4, 2030

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG03B21/28
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A system and method for using an optical lightguide in a projection display system. A plurality of light sources provides a plurality of colored light to a lightguide. The lightguide may include alternating layers of a relatively high refractive index material and a relatively low refractive index material. In an embodiment, the layers of the lightguide are tapered. In another embodiment, the lightguide includes a light pipe having a lenticular array on the entrance face of the light pipe. Optionally, the light pipe may be tapered. The lightguide provides a line of light to a scanning element, which in turn redirects the light to a spatial light modulator.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.