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Apertured fluorescent illumination device for backlighting an image plane

  • US 5,645,337 A
  • Filed: 11/13/1995
  • Issued: 07/08/1997
  • Est. Priority Date: 11/13/1995
  • Status: Expired due to Fees
First Claim
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1. An illuminated display system, comprising:

  • a generally planar display;

    a fluorescent lamp underlying said generally planar display, said fluorescent lamp having an interior surface thereof substantially coated with a phosphor and an aperture for emitting illumination toward said planar display;

    a reflector for collecting said emitted illumination and reflecting said collected illumination toward said planar display, said reflector being positioned intermediate said fluorescent lamp and said display; and

    a lens for receiving said illumination reflected by said reflector, and for aiming said received illumination toward a viewer of said display, said lens being positioned between said reflector and said display;

    wherein said reflector comprises two generally planar elements, each of said generally planar elements extending from a respective end of said aperture to said lens, and wherein the width of said lens (dlens) is determined by the formula;

    dlens ×

    sin (θ

    )=daper, wherein daper is the width of said aperture and θ

    is the viewing half angle of light emanated by the display.

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