Illumination apparatus for a digitizer tablet with improved light panel
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United States of America Patent
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Apr 7, 1998
Grant Date -
N/A
app pub date -
Mar 1, 1995
filing date -
Mar 1, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An illumination apparatus for a digitizer tablet includes a support structure and a solid sheet optical light guide supported by the support structure and having first and second opposing surfaces and a plurality of edges. Light sources are carried by the support structure and positioned to direct light into light-receiving edges of the light guide. Reflecting structure is disposed adjacent the first surface of the light guide. A predetermined pattern is disposed on the first surface of the light guide structured and arranged in accordance with distance from the light sources.
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