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ELECTROSTATIC DETECTION DEVICE, INFORMATION APPARATUS, AND ELECTROSTATIC DETECTION METHOD

  • US 20110169768A1
  • Filed: 06/23/2009
  • Published: 07/14/2011
  • Est. Priority Date: 07/08/2008
  • Status: Abandoned Application
First Claim
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1. An electrostatic detection device detecting approach or a position of an object such as a human finger by changes in electrostatic coupling, comprising:

  • a detection panel including one or a plurality of detection electrodes;

    charge/discharge means for repeatedly performing charge/discharge of the detection electrodes of the detection panel;

    characteristic extraction means for repeatedly extracting characteristics of the charge/discharge which are changed by approach of the object;

    accumulation analog/digital conversion means for accumulating the characteristics repeatedly extracted by the characteristic extraction means and performing analog/digital conversion;

    post-processing means for calculating approach or a position of the object from an output of the accumulation digital/analog conversion means; and

    control means for managing an overall state and sequence,wherein the characteristic extraction means includes QV conversion means for converting charge/discharge characteristics into values, inversion means for performing inversion synchronizing with the charge/discharge, and gain changing means for changing a gain of first and last characteristic extraction of the repeated charge/discharge.

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