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Ultra compact illumination system for display systems

  • US 20060158902A1
  • Filed: 06/06/2004
  • Published: 07/20/2006
  • Est. Priority Date: 07/14/2003
  • Status: Active Grant
First Claim
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1. An illumination system (300) comprising a light guide (302) having an entrance face, an exit face and an aperture in which a light source (301) can be arranged, the system being characterized in that it comprises:

  • a light reflective structure (307) arranged in proximity to the light guide (302) entrance face, the light reflective structure (307) being arranged with an aperture in which the light source (301) can be fitted; and

    a first light refractive structure (306) arranged in proximity to the light guide (302) exit face, in which first light refractive structure (306);

    at least a subset of light beams of a first angular interval (303) with respect to the optical axis (304) of the system (300) is refracted to illuminate the light guide (302) exit face, and at least a subset of light beams of a second angular interval (305) with respect to said optical axis (304) is reflected to be recycled in the light guide (302).

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