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Illumination apparatus for a digitizer tablet with improved light panel

  • US 5,736,686 A
  • Filed: 03/01/1995
  • Issued: 04/07/1998
  • Est. Priority Date: 03/01/1995
  • Status: Expired due to Fees
First Claim
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1. An illumination apparatus for a digitizer tablet, the apparatus comprising:

  • a support structure;

    a solid sheet optical light guide positioned above said support structure and having first and second opposing surfaces and a plurality of edges;

    at least one light source carried by said support structure and positioned to direct light into at least one light-receiving edge of said light guide; and

    reflecting structure disposed adjacent said first surface of said light guide,a predetermined non-uniform pattern of surface disturbances associated with said first surface of said light guide, said pattern being structured and arranged in accordance with distance from said at least one light source.

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