Patent ID: 9727194
Date: 2017-08-08
CPC Classifications: G06F

Claim:
1. A touch panel apparatus comprising: a first substrate in which a first conductive film is formed thereon; a second substrate in which a second conductive film is formed thereon; a first terminal, a second terminal, a third terminal, and a fourth terminal respectively provided on the second substrate; and a controller, wherein the controller is configured to: calculate a first potential difference between a potential of the first terminal and a first reference potential and a second potential difference between a potential of the second terminal and a second reference potential, in a state where the first terminal and the second terminal are connected to the power source potential and the third and fourth terminals are connected to the ground potential, calculate a third potential difference between a potential of the second terminal and a third reference potential and a fourth potential difference between a potential of the third terminal and a fourth reference potential, in a state where the second terminal and the third terminal are connected to the power source potential and the first and fourth terminals are connected to the ground potential, obtain a potential difference having a largest value among the first, second, third, and fourth potential differences, and calculate a positional relationship between two contact points based on the potential difference having the largest value.