Molded two part button with illuminated graphic

Details Molded two part button with illuminated graphic Molded two part button with illuminated graphic

1997-10-03

1999-11-30

Sember, Thomas M.

Illumination

Illuminated scale or dial

Internal light source

362302, 200314, F21Q 300

Patent

active

059930195

ABSTRACT:
A backlighted button or knob made by multi-shot molding has a translucent part and an opaque part. At the front of the button the translucent part contains a ridge shaped in the form of a symbol which is illuminated. The opaque part surrounds the ridge to mask light to surrounding areas. Where the symbol is a closed figure defining an island, a passage behind the ridge coupled the island to the surrounding areas to allow opaque material to flow to the island during molding, and results in an opaque bridge in the passage. To minimize a shadow of the bridge on the illuminated symbol the bridge is spaced far behind the ridge to allow light to be conducted through the translucent material to the ridge portion just in front of the bridge.

REFERENCES:
patent: 5036440 (1991-07-01), Takii et al.
patent: 5510782 (1996-04-01), Norris et al.
patent: 5536543 (1996-07-01), Papandreou
patent: 5718326 (1998-02-01), Larose et al.

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