Patent ID: 8173922

Claim:
A thin type illuminated keyboard comprising: a light source for emitting light; a light-guiding frame plate having a concave structure in a bottom surface thereof; a keycap connected with said light-guiding frame plate, and movable upwardly or downwardly with respect to said light-guiding frame plate, wherein said keycap has a light-transmissible character portion; a membrane plate, wherein said light source is disposed on said membrane plate and accommodated within said concave structure of said light-guiding frame plate; a switch circuit plate; and a base plate, wherein said keycap, said light-guiding frame plate, said membrane plate, said switch circuit plate and said base plate are sequentially arranged from top to bottom, and said light emitted by said light source is guided by said light-guiding frame plate to irradiate said light-transmissible character portion, and wherein a scattering portion is formed on an inner wall of said concave structure at a side close to said keycap.