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US 4,124,879 AGranted
Illumination apparatus for use in an illuminatable pushbutton keyset and the like
AssigneeMotorola, Inc.
InventorHans L. Schoemer
Life of this patent
Estimating the term…
Abstract
An illumination apparatus which includes a plurality of indicating means arranged in rows, a light source, a light pipe assembly having a plurality of transparent light pipes disposed between the rows of indicating means, and means for distributing the light rays from the light source so that the indicating means are evenly and uniformly illuminated.
Claims9
An illumination apparatus comprising:
- a plurality of illuminatable indicating means arranged in rows;
- a light source for providing a plurality of light rays;
- a light pipe assembly having a plurality of transparent light pipe fingers disposed between the rows of said indicating means and having a light distributing portion connected to said light pipe fingers at one end thereof, said light source being disposed within said light distributing portion, said light distributing portion indirectly conducting light rays from said light source to the connected ends of said light pipe fingers, said light pipe fingers providing substantially uniform back illumination of said indicating means with the conducted indirect light rays.
Dependencies are inferred from the claim text.