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High brightness telltale for a head-up display

  • US 5,148,146 A
  • Filed: 06/17/1991
  • Issued: 09/15/1992
  • Est. Priority Date: 06/17/1991
  • Status: Expired due to Fees
First Claim
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1. A head up display apparatus, comprising:

  • a head up display housing in which is mounted an image source; and

    a combiner located in a path of light from the image source so that the combiner projects a projected image of the image source perceivable by an operator'"'"'s eye, whereinwithin the head up display housing, the image source comprises a first high brightness telltale, comprising (a) a telltale housing defining a cavity and an aperture, the telltale housing having an inner reflective surface with a curved shape having a focal point outside the telltale housing such that the aperture is located between the curved surface and the focal point, (b) means for sourcing light mounted within the telltale housing and emitting light, including light which travels substantially parallel to a plane of the aperture wherein the light is reflected off of the inner reflective surface and through the aperture in a manner in which the light has a substantial focus at the focal point, and (c) means for providing a graphics symbol, mounted at the aperture, wherein the graphics symbol is brightly lit to be projected.

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