Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 15, 2008
0Patent Application Number
105529210
Date Filed
April 19, 2004
0Patent Primary Examiner
Patent abstract
The present invention is configured so that one light emission source such as a light emitting diode is placed inside an operation knob in front of a light guiding piece or in a bearing of the operation knob. A light beam from the light emission source is emitted to the interior of the operation knob. A reflected indirect light irregularly reflected inside the operation knob is received by the light guiding piece located at a rear surface of the operation knob. The light guiding piece has a transmission and diffusion function. The light is then guided toward an outer periphery to illuminate the rear surface of the operation knob.
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