Heater device

A heater device having a heat generating portion configured to generate a heat output arranged on an insulating substrate, comprising:

• a first detection pattern arranged on the insulating substrate, having a first transmitting electrode and a first receiving electrode for detecting an object, the first detection pattern being configured to detect a change in capacitance between the first transmitting electrode and the first receiving electrode;
• a second detection pattern arranged on the insulating substrate, having a second transmitting electrode and a second receiving electrode for detecting the object, the second detection pattern being configured to detect a change in capacitance between the second transmitting electrode and the second receiving electrode;
• a capacitance determination unit configured to determine whether or not one of the change in capacitance between the first transmitting electrode and the first receiving electrode and the change in capacitance between the second transmitting electrode and the second receiving electrode is equal to or higher than a first threshold value, whether or not the other of the change in capacitance between the first transmitting electrode and the first receiving electrode and the change in capacitance between the second transmitting electrode and the second receiving electrode is lower than a second threshold value;
• and
• a disconnection determination unit configured to determine that a disconnection of the first detection pattern or the second detection pattern occurs, when the capacitance determination unit determines that one of the change in capacitance between the first transmitting electrode and the first receiving electrode and the change in capacitance between the second transmitting electrode and the second receiving electrode is equal to or higher than the first threshold value, and the other of the change in capacitance between the first transmitting electrode and the first receiving electrode and the change in capacitance between the second transmitting electrode and the second receiving electrode is lower than the second threshold value,
• wherein the heat output stops based on the determination of the disconnection determination unit that the disconnection of the first detection pattern or the second detection pattern occurs.