Patent · US Expired

Illumination system for a micro display

US6490104B1 · kind B1 · utility

67Cited by
10References
23Claims
0Family size

Assignee

Inventors

Key dates

Filing dateSep 14, 2001
Grant dateDec 3, 2002
Priority date—
Expiry dateSep 14, 2021

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02F1/133622
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A compact and efficient illumination system is provided that is particularly suitable for illuminating a micro display and places the light source within the view of the display. In one embodiment, the illumination system comprises a light source, a package for the light source having a reflective surface on at least one side of the light source, and a diffuser opposite the reflective surface in direct view of the light source. The invention further comprises a film stack to receive light through the diffuser, the film stack transmitting light within a maximum exit angle and reflecting substantially all other light to the diffuser.

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