Input device using detection of both capacitance and pressure, and capacitance-system hybrid touch panel equipped with pressure-sensitive function

A capacitance-system hybrid touch panel equipped with a pressure-sensitive function, comprising:

• an input part including:
• electrically-connectable electrode parts arranged to face each other, the electrode parts including a first electrode part which has a plurality of first electrode lines in parallel with each other and which is to be an operation object by input means of a conductor, and a second electrode part opposing the first electrode part and having a plurality of second electrode lines which are orthogonal to the plurality of first electrode lines and which are contactable and separable arranged in a matrix shape with respect to the plurality of first electrode lines;
• a pressure-sensitive layer which is disposed between the first electrode part and the second electrode part as in the opposing manner and which is sandwiched and fixed between the first electrode part and the second electrode part by a pressure force of the input means against the first electrode part, and an electrical resistance value of which changes according to a pressure of the sandwiching and the fixing,
• a detection circuit which is configured such that the input part is connected and such that a capacitance detection signal showing a capacitance between the input means and the first electrode part and a capacitance between the first electrode part and the second electrode part and a resistance detection signal showing an electrical resistance value between the first electrode part and the second electrode part which are electrically connected via the pressure-sensitive layer are inputted from the input part and such that an operation state, an operation position and an operation pressure of the input means are detected;
• a first drive part having a plurality of switching elements which perform contact and separation between each of the plurality of first electrode lines and the detection circuit;
• a second drive part having a plurality of switching elements which perform contact and separation between each of the plurality of second electrode lines and the detection circuit;
• a control part performing drive control of the first drive control part and the second drive control part;
• and
• an output part which outputs a signal showing the operation state, the operation position, and the operation pressure of the input means detected by the detection circuit;
• wherein the detection circuit includes:
• a charge/discharge waveform forming part including a charge/discharge circuit having at least a constant current source, a switching element, a capacitor and a resistor and which forms a charge/discharge waveform with the capacitance detection signal and the resistance detection signal inputted, and
• a charge/discharge waveform calculating part which detects a change of the capacitance and of the pressure in the capacitance detection signal and the resistance detection signal based on the charge/discharge waveform formed by the charge/discharge waveform forming part and which calculates the operation state, the operation position and the operation pressure of the input means.