Illuminated keyboard switch structure

Illumination – Illuminated scale or dial – Internal light source

Reexamination Certificate

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Details

C362S028000, C362S095000, C200S314000, C200S317000

Reexamination Certificate

active

06860612

ABSTRACT:
An illuminated keyboard having a key portion, a backlight device, a light-condensing plate, a diffuser, a printed circuit board, and a light source. The key portion includes a seat and a key, and the key is disposed on the seat in a manner such that it is moved upwardly and downwardly. The backlight device is disposed beneath the key portion to illuminate the key portion. The light-condensing plate is disposed between the light guide and the key portion. The diffuser is disposed between the light guide and the key portion. The printed circuit board is disposed between the seat and the backlight device. The light source is disposed on the printed circuit board.

REFERENCES:
patent: 4449024 (1984-05-01), Stracener
patent: 4489227 (1984-12-01), Lamarche
patent: 5097396 (1992-03-01), Myers
patent: 5128842 (1992-07-01), Kenmochi
patent: 5521342 (1996-05-01), Bartley et al.
patent: 5924553 (1999-07-01), Yeh
patent: 6179432 (2001-01-01), Zhang et al.
patent: 6199996 (2001-03-01), Katrinecz, Jr. et al.
patent: 6284988 (2001-09-01), Watanabe et al.
patent: 6322229 (2001-11-01), Chan et al.
patent: 6545232 (2003-04-01), Huo-Lu
patent: 6686549 (2004-02-01), Douzono et al.
patent: 438035 (2001-05-01), None
patent: 465777 (2001-11-01), None

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