ELECTROSTATIC DETECTION DEVICE, INFORMATION APPARATUS, AND ELECTROSTATIC DETECTION METHOD
First Claim
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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Accused Products
Abstract
An electrostatic detection device includes a detection panel 1 having one or a plurality of detection electrodes, charge/discharge means 2 for repeatedly performing charge/discharge, characteristic extraction means 3 for repeatedly extracting characteristics, accumulation analog/digital conversion means 4 for accumulating the characteristics and performing analog/digital conversion, post-processing means 5 for calculating approach or a position of the object, control means 7 for managing an overall state and sequence, gain changing means 52 for changing a gain of the first and last characteristic extraction of the charge/discharge, and abnormality detection means 10 for detection whether or not there is abnormality. Accordingly, it is possible to attenuate or remove an influence of noises with a simple configuration.
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Citations
31 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electrostatic detection device detecting approach or a position of an object such as a human finger by a change in electrostatic coupling, comprising:
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an electrode 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 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; abnormality detection means for detecting whether or not there is an abnormality in an output of the characteristic extraction means; and control means for managing an overall state and sequence. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. An electrostatic detection method of detecting approach or a position of an object such as a human finger by changes in electrostatic coupling, comprising:
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a charge/discharge process of repeatedly performing charge/discharge of detection electrodes of a detection panel; a characteristic extraction process of repeatedly extracting characteristics of the charge/discharge changed by approach of the object; an accumulation analog/digital conversion process of accumulating the characteristics repeatedly extracted by the characteristic extraction means and performing analog/digital conversion; a post-processing process of calculating approach or a position of the object from an output of the accumulation digital/analog conversion means; and a control process of managing an overall state and sequence, wherein the characteristic extraction process includes a QV conversion process of converting charge/discharge characteristics into values, an inversion process of performing inversion synchronizing with the charge/discharge, and a gain changing process of changing a gain of first and last characteristic extraction. - View Dependent Claims (17, 18, 19, 20, 21)
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22. An electrostatic detection method of detecting approach or a position of an object such as a human finger by changes in electrostatic coupling, comprising:
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a charge/discharge process of repeatedly performing charge/discharge of detection electrodes of a detection panel; a characteristic extraction process of repeatedly extracting characteristics of the charge/discharge changed by approach of the object; an accumulation analog/digital conversion process of accumulating the characteristics repeatedly extracted by the characteristic extraction process and performing analog/digital conversion; a post-processing process of calculating approach or a position of the object from an output of the accumulation digital/analog conversion process; and an abnormality detection process of detecting whether or not there is abnormality in an output of the characteristic extraction means; and a control process of managing an overall state and sequence. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31-35. -35. (canceled)
Specification