Patent ID: 9342199
Filing Date: 2016-05-17
CPC Classification: G06F

Claim Text:
1. A touch detection device comprising: a drive unit that supplies an excitation signal having at least variable magnitude to a first electrode at a predetermined period for detecting approach or a touch of an object; a detection unit electrically coupled to a second electrode provided to be opposed to the first electrode to detect approach or a touch of the object according to an output value from the second electrode; and an element that electrically couples the drive unit and the detection unit, receives the excitation signal from the drive unit, and has a predetermined size of electrostatic capacitance, wherein the touch detection device is configured to correct an output value from the second electrode by using an output value from the element and the output value from the second electrode obtained at the same timing, and wherein the excitation signal to be input to the first electrode is inverted and input to the element, and the sum of the output value from the second electrode and the output value from the element is a correction value of the output value from the second electrode.