Patent ID: 9448673
Filing Date: 2016-09-20
CPC Classification: G06F

Claim Text:
1. A touch panel, comprising: a plurality of resonant circuits provided along a touch detection surface; a plurality of input signal lines for inputting, to the plurality of resonant circuits, input signals for causing resonance; a plurality of output signal lines for outputting output signals output from the plurality of resonant circuits, respectively, a signal input unit for inputting, to each of the plurality of resonant circuits, an input signal for causing resonance; a detecting unit for detecting frequencies of a plurality of output signals output from the plurality of resonant circuits; a comparing unit for comparing each of the frequencies of the plurality of output signals detected in the detecting unit with a first threshold value, and comparing the each of the frequencies of the plurality of output signals with a second threshold value; and a variation detection signal generating unit for generating, when the comparing unit determines that at least one of the frequencies of the plurality of output signals is one of smaller than the first threshold value and larger than the second threshold value, a variation detection signal for identifying a resonant circuit that outputs an output signal having a frequency that is determined to be one of smaller than the first threshold value and larger than the second threshold value, wherein each of the plurality of resonant circuits includes: an inductor bridged between a corresponding one of the plurality of input signal lines and a corresponding one of the plurality of output signal lines; and wherein the first electrode is formed of a part of the corresponding one of the plurality of output signal lines or provided with the corresponding one of the plurality of output signal lines, and wherein the second electrode is formed of a part of the corresponding one of the plurality of input signal lines or provided with the corresponding one of the plurality of input signal lines.