Touch panel, method for controlling touch panel and non-transitory computer-readable recording medium

A method for controlling a touch panel including a first resistive film having a first electrode and a second electrode provided at both ends in a first direction, a second resistive film having a third electrode and a fourth electrode provided at both ends in a second direction perpendicular to the first direction, a plurality of switches connected to the first to fourth electrodes, and a controller that controls the plurality of switches, the method for controlling the touch panel comprising:

• controlling the plurality of switches so as to apply a voltage to the first electrode and the second electrode and ground the third electrode, measuring a first voltage value applied to the fourth electrode when two points are pressed on the first resistive film, controlling the plurality of switches so as to apply a voltage to the first electrode and the second electrode and ground the fourth electrode, and measuring a second voltage value applied to the third electrode when two points are pressed on the first resistive film;
• determining a value twice the total of the first voltage value and the second voltage value as a value corresponding to a contact area of the two points when two points are pressed on the first resistive film;
• controlling the plurality of switches so that the first electrode is at a high potential and the second electrode is at a low potential, applying a voltage to the first resistive film via a first voltage dividing resistor, measuring a first direction voltage applied to the first resistive film in the first direction when the two points are pressed, controlling the plurality of switches so that the third electrode is at a high potential and the fourth electrode is at a low potential, applying a voltage to the second resistive film via a second voltage dividing resistor, measuring a second direction voltage applied to the second resistive film in the second direction when the two points are pressed, and calculating a distance between the two points based on the first direction voltage and the second direction voltage;
• and
• correcting, based on the contact area of the two points and the distance between the two points when the two points are pressed by each of a plurality of inputters, the distance between the two points when the two points are pressed by one of the plurality of inputters having a tip with a diameter larger than a diameter of a tip of another of the plurality of inputters and smaller than a diameter of a tip of the other of the plurality of inputters to the distance between the two points when the two points are pressed by the another of the plurality of inputters.

A non-transitory computer-readable recording medium having stored therein a program for causing a controller in a touch panel to execute a process, the touch panel including a first resistive film having a first electrode and a second electrode provided at both ends in a first direction, a second resistive film having a third electrode and a fourth electrode provided at both ends in a second direction perpendicular to the first direction, a plurality of switches connected to the first to fourth electrodes, and the controller that controls the plurality of switches, the process comprising:

• controlling the plurality of switches so as to apply a voltage to the first electrode and the second electrode and ground the third electrode, measuring a first voltage value applied to the fourth electrode when two points are pressed on the first resistive film, controlling the plurality of switches so as to apply a voltage to the first electrode and the second electrode and ground the fourth electrode, and measuring a second voltage value applied to the third electrode when two points are pressed on the first resistive film;
• determining a value twice the total of the first voltage value and the second voltage value as a value corresponding to a contact area of the two points when two points are pressed on the first resistive film;
• controlling the plurality of switches so that the first electrode is at a high potential and the second electrode is at a low potential, applying a voltage to the first resistive film via a first voltage dividing resistor, measuring a first direction voltage applied to the first resistive film in the first direction when the two points are pressed, controlling the plurality of switches so that the third electrode is at a high potential and the fourth electrode is at a low potential, applying a voltage to the second resistive film via a second voltage dividing resistor, measuring a second direction voltage applied to the second resistive film in the second direction when the two points are pressed, and calculating a distance between the two points based on the first direction voltage and the second direction voltage;
• and
• correcting, based on the contact area of the two points and the distance between the two points when the two points are pressed by each of a plurality of inputters, the distance between the two points when the two points are pressed by one of the plurality of inputters having a tip with a diameter larger than a diameter of a tip of another of the plurality of inputters and smaller than a diameter of a tip of the other of the plurality of inputters to the distance between the two points when the two points are pressed by the another of the plurality of inputters.