Patent ID: 7939773

Claim:
An illuminated keyboard with a light guide plate comprising: a key module; and a luminous module located under the key module, the luminous module comprising: a transparent light guide plate, comprising a plurality of light input units and light output units, the light input units being sections formed at the light guide plate, each light output unit being provided with a plurality of light output members to provide light to the key module; a plurality of illuminants, located corresponding to the light input units, the light emitted by the illuminants being transmitted into the light guide plate via the sections, the light output units located at the same side of the illuminants each having increasing quantity of light output members with the increasing distance between the light output units and the illuminants; and a light reflection plate located under the light guide plate; wherein the illuminants are LEDs emitting light with unilateral side and located at the light reflection plate; the light reflection plate is provided with a plurality of receiving holes respectively receiving the illuminants therein, a circuit board is disposed at the bottom surface of the light reflection plate corresponding to the receiving holes, the circuit board is electrically connected with the illuminants and is connected to a power supply via a power wire; a plurality of through holes is defined in the light guide plate thereby forming the sidewall of the through hole to be the light input units; and the through holes located corresponding to the receiving holes respectively receive the illuminants therein; wherein each light output member is a round through aperture, and the outermost light output units far away from the illuminants are further provided with elongate through slots respectively; wherein the light output units are arranged in a plurality of rows, and the light output units at the same side of the illuminants are interlaced with each other.