Illuminated keyboard

An illuminated keyboard, comprising:

• a key structure, wherein when said key structure is depressed, a key signal is correspondingly triggered;
• and
• a backlight membrane switch board for generating said key signal and emitting a light beam to said key structure, wherein said backlight membrane switch board comprises:
• a light source for emitting said light beam;
• a light guide plate for transferring said light beam, wherein said light guide plate comprises a first circuit layer;
• a wiring plate comprising a second circuit layer and a light source circuit layer, wherein said light source circuit layer is electrically connected with said light source for driving said light source;
• and
• a partition plate arranged between said light guide plate and said wiring plate, wherein as said key structure is depressed, said first circuit layer of said light guide plate and said second circuit layer of said wiring plate are contacted with each other to generate said key signal.