Patent ID: 8337028

Claim:
A light guide sheet adapted to be used with a light emitter for use within a movable contact assembly, said light guide sheet comprising: a base having a film shape and having a lower surface, the base being light-transmissive; a light inlet section including a plurality of light guide layers having an upper surface and an edge surface connected to the upper surface, the upper surface of the light inlet section being bonded to the lower surface of the base, wherein light emitted from the light emitter enters into the edge surface of the light inlet section, and the light inlet section causes the entering light to enter into the base; and an illumination section adapted to diffuse the light entering into the base, wherein the light inlet section has a refractive index lower than a refractive index of the base, and wherein the light emitted from the light emitter enters into the lower surface of the base obliquely with respect to the lower surface of the base.