| 摘要 |
An illumination device for an indicating needle includes a plurality of light sources, an indicating needle, a guiding member, and a luminance control unit. The indicating needle includes a needle body and a needle base. The base has an entrance surface and a reflection surface. A luminance control unit controls luminance of the light sources in response to turning of the indicating needle such that the luminance is lowest when a light emitted perpendicularly from a center of an emitting surface of the light source is reflected off a reflection surface's region which a longitudinal central line of the needle body intersects with, and that the luminance gradually increases as the light emitted by the light source from the center of the emitting surface thereof is reflected off a region that is more distant from the region which the longitudinal central line of the needle body intersects with.
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