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Fiber optic illumination of HUD image source

  • US 5,657,163 A
  • Filed: 05/31/1995
  • Issued: 08/12/1997
  • Est. Priority Date: 05/31/1995
  • Status: Expired due to Fees
First Claim
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1. A head up display for a vehicle comprising:

  • an image source including a color filter pattern;

    optical means for projecting an image of the source into the field of view of a vehicle operator; and

    means for illuminating the image source comprising a light source remote from the image source and a plurality of fiber optic light guides between the light source and the image source for conducting light to the image source for illuminating the pattern;

    the light source comprisinga lamp for illuminating an end of each light guide,a holder for securing each light guide in alignment with a corresponding lamp, andmeans for protecting the light guides from heat from the lamps;

    wherein the holder comprises a thermally conductive block havinga parallel array of aligned apertures for securing light guides and lamps in alignment and spaced from one another, andan array of cooling apertures transverse to the aligned apertures for dissipating heat from the block.

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