Light emitting keypad assembly

Details Light emitting keypad assembly Light emitting keypad assembly

2006-02-28

2006-02-28

Lee, Kyung (Department: 2832)

Electricity: circuit makers and breakers

Electric switch details

Indicators

C200S512000, C200S314000

Reexamination Certificate

active

07005595

ABSTRACT:
A light-emitting keypad assembly is mounted on a substrate of a cellular phone and has a silicon layer, an illuminating layer formed on top of the silicon layer, multiple keys formed on top of the illuminating layer and multiple protrusions formed on the bottom of the silicon layer. When the keys are pressed down, the protrusions directly press against contacts on the substrate without any obstruction. The light from the light-emitting layer is able to penetrate all the keys to make the light emitting keypad assembly bright.

REFERENCES:
patent: 4349705 (1982-09-01), Kuhfus
patent: 4449024 (1984-05-01), Stracener
patent: 5664667 (1997-09-01), Kenmochi
patent: 6100478 (2000-08-01), LaPointe et al.
patent: 6605789 (2003-08-01), Chen et al.
patent: 6743993 (2004-06-01), Clark et al.
patent: 6777626 (2004-08-01), Takabatake et al.

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