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Apparatus and method for inputting reflected light image of a target object

  • US 6,714,247 B1
  • Filed: 03/16/1999
  • Issued: 03/30/2004
  • Est. Priority Date: 03/17/1998
  • Status: Expired due to Fees
First Claim
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1. An information input apparatus comprising:

  • a light emitter for irradiating an object with light;

    an image sensor comprising first cells configured to pick up at an emission time and second cells configured to pick up at a non-emission time, said first and second cells arranged two-dimensionally, the image sensor comprising light-receiving cells configured to pick up a visible light image;

    a timing signal generator for generating a timing signal comprised of a pulse signal or a modulation signal for controlling an intensity of light of said light emitter;

    a control signal generator for generating a control signal for individually controlling light-receiving timings of the light-receiving cells of said area image sensor on the basis of the timing signal from said timing signal generator;

    a detection means for detecting a difference in accumulated electrical charges between a cell of the first cells and a corresponding cell of the second cells;

    a pass filter for passing only light emitted by said light emitter;

    a cut filter for intercepting light emitted by said light emitter; and

    means for selecting one of the pass filter and the cut filter upon passing light to be sensed.

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