Switch having combined light pipe and printed circuit board

Details Switch having combined light pipe and printed circuit board Switch having combined light pipe and printed circuit board

1994-12-27

1996-05-28

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200314, 362 31, 362 95, H01H 1370, F21V 3300

Patent

active

055213421

ABSTRACT:
An illuminated elastomeric keypad switch assembly has an optical conductor on which a printed circuit is printed via electrically conductive ink and a keypad provided with translucent areas for passage of light. The optical conductor has recesses located adjacent the key caps whose width and depth progressively increases proceeding from the closest to the farthest key cap from a light source so that a uniform amount of light is transmitted through the key caps.

REFERENCES:
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patent: 4288672 (1981-09-01), Puccini
patent: 4343975 (1981-09-01), Sado
patent: 4636593 (1987-01-01), Novak et al.
patent: 4644326 (1987-02-01), Villalobos et al.
patent: 4772769 (1988-09-01), Shumate
patent: 4839474 (1989-06-01), Pankhurst et al.
patent: 4892981 (1990-01-01), Soloway et al.
patent: 4937408 (1990-06-01), Hattori et al.
patent: 5128842 (1992-07-01), Kenmochi
patent: 5153590 (1992-10-01), Charlier
Assignee's copending application 08/279,147 filed Jul. 22, 1994.

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