초록 ▼

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 l

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.

대표청구항 ▼

[ What is claimed is:] [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 carrie

[ What is claimed is:] [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; andreflecting 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.