Patent ID: 7661859

Claim:
An operation panel comprising: a casing having a front surface; first and second operation elements disposed on the front surface of the casing; a light source for emitting light to each of the first and second operation elements and disposed in the casing; and a brightness adjustment layer for covering at least a part of a light emitting surface of the light source, wherein the first operation element includes a first light transmission part, and the second operation element includes a second light transmission part, the light from the light source transmits the first and second light transmission parts so that the light is output from the casing, and the brightness adjustment layer adjusts brightness of the light emitted from the light source and outputting toward one of the first and second light transmission parts, wherein the part of the light emitting surface corresponds to the first light transmission part, and another part of the light emitting surface corresponds to the second light transmission part, a first distance between the part of the light emitting surface and the first light transmission part is smaller than a second distance between the another part of the light emitting surface and the second light transmission part, and the brightness adjustment layer is arranged such that a light reduction rate of the light emitted from the part of the light emitting surface is larger than a light reduction rate of the light emitted from the another part of the light emitting surface.