A light guide mechanism includes a surface member, a bottom member, a connecting member and a light source. The connecting member is used to connect the surface member and the bottom member. The bottom member has a first side and a second side, and the light source faces the first side and is separated from the first side by a distance of 11 mm.about.15 mm. The light source is also separated from the top surface by a distance of 10 mm.about.15 mm. The first side is covered by a diffusion material to diffuse the light from the light source and the second side is covered by an aluminum material to prevent the light source from being diffused.
