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Light guiding plate with internal micro-prisms

  • US 6,575,584 B1
  • Filed: 04/14/2000
  • Issued: 06/10/2003
  • Est. Priority Date: 05/28/1999
  • Status: Expired due to Fees
First Claim
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1. An illumination device comprising a plate for guiding light there through, said plate having an input for receiving an input light beam injected into said plate and an array of N micro-prisms inside and encapsulated by said plate, each said array of N micro-prisms having an inclined reflective surface forming a homogenous medium around said array of N micro-prisms for receiving the input light beam and for producing an output light beam from said input light beam, the micro-prisms have a right angle triangle cross section and an angle between inclined and vertical surfaces between 15 to 35 degrees, and the array of micro-prisms receives the input light beam with an angle of incidence less than 90 degrees.

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