Luminous keyboard

A luminous keyboard, comprising:

• at least one key structure exposed outside the luminous keyboard;
• a switch circuit board located under the at least one key structure, wherein when the switch circuit board is triggered by the at least one key structure, a corresponding key signal is generated, wherein the switch circuit board comprises at least one circuit board opening;
• a supporting plate located under the switch circuit board and connected with the at least one key structure, wherein the supporting plate comprises at least one supporting plate opening corresponding to the at least one circuit board opening;
• a backlight module located under the supporting plate, and generating a light beam and projecting the light beam to the at least one key structure through the at least one supporting plate opening and the at least one circuit board opening;
• and
• at least one ring-shaped structure corresponding to the at least one key structure, wherein the at least one ring-shaped structure is disposed on the switch circuit board and arranged around the corresponding key structure, wherein when the light beam is reflected by the at least one key structure, the light beam is received by the at least one ring-shaped structure, so that a luminous effect is generated.