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Optical trackball device and electronic apparatus

  • US 20040036677A1
  • Filed: 06/19/2003
  • Published: 02/26/2004
  • Est. Priority Date: 07/01/2002
  • Status: Active Grant
First Claim
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1. A trackball device comprising:

  • (a) a ball which is an operating member for operating said trackball device;

    (b) a support member for rotatably supporting said ball;

    (c) a light emitter for emitting light to said ball;

    (d) a detector for detecting light reflected on said ball against said light emitted from said light emitter; and

    (e) a controller for controlling said light emitter and said detector;

    wherein said ball partially transmits said light from said light emitter so as to illuminate said ball.

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