Illuminated button backlighted by white light

Details Illuminated button backlighted by white light Illuminated button backlighted by white light

1998-07-08

2000-11-14

Chiang, Jack

Telephonic communications

Supervisory or control line signaling

Substation originated

379433, H04M 100

Patent

active

061480754

ABSTRACT:
An illuminated button including a key button and an electroluminescent light (EL) for illuminating the key button from its bottom. The key button is composed of a silicone rubber material mixed with white color particles which prevent, while the EL is inoperative, a pink light reflected from the EL from being projected to the outside through the key button. This makes possible to solve a problem of a conventional illuminated button, which includes a key button and a white light EL used as a backlight, in that the pink color of the EL is seen from the outside through the key button, and this spoils the beauty of the illuminated button.

REFERENCES:
patent: 5573107 (1996-11-01), Nakano et al.
patent: 5797482 (1998-08-01), LaPointe et al.

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