Illuminated switch and keypad assembly having a light gradient a

Details Illuminated switch and keypad assembly having a light gradient a Illuminated switch and keypad assembly having a light gradient a

1993-06-01

1995-01-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

341 31, 200 5A, G01D 534

Patent

active

053844599

ABSTRACT:
A switch assembly (100) includes a key area (104) and a light reception section (114) for receiving light from input lightpipe (106) and providing some of the light to key area (104). Switch assembly (100) further includes an output lightpipe (122) and an optical conversion section (116) for modifying the light which is received by output lightpipe (122) when key area (104) is activated.

REFERENCES:
patent: 3519116 (1970-07-01), Koehn
patent: 3937952 (1976-02-01), Ripley et al.
patent: 4636593 (1987-01-01), Novak et al.
patent: 4641026 (1987-02-01), Garcia, Jr.
patent: 4916262 (1990-04-01), Jungels-Butler et al.
patent: 5034602 (1991-07-01), Garcia, Jr. et al.
patent: 5153590 (1992-10-01), Charlier
Ealing Electro-Optics Inc., data sheet disclosing optical filter, Aug. 1992, 4 pages.

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