Patent ID: 8692147

Claim:
An illuminated keyboard, comprising: plural keys; a base plate disposed under said plural keys for supporting said keys; an illumination module disposed on said base plate and located at a first side of said base plate for emitting plural light beams; plural light guide tubes arranged between said plural keys and said base plate for guiding said light beams to said plural keys, wherein said plural light guide tubes are optical fibers, and each of said optical fibers comprises: an optical core, wherein said light beams are transmissible through said fiber core; a fiber shell sheathed around said fiber core for preventing leakage of said light beams to surroundings from said optical core; and plural light-guiding microstructures disposed within said fiber core for guiding said light beams to said plural keys; and at least one optical coupling element arranged between said illumination module and said plural light guide tubes for guiding said light beams to said plural light guide tubes and adjusting an incident angle of said light beams to be incident into said plural light guide tubes.