Abstract: A heater apparatus includes a heat generating unit, an outer surface, a temperature sensor and a detection unit. A first control portion of an electronic control unit controls temperature of the heat generating unit in such a way that it stops or reduces electric power supply to the heat generating unit, when it determines that an object has been brought into contact with a first region of the outer surface. A second control portion of the electronic control unit controls the temperature of the heat generating unit depending on a detected temperature of the temperature sensor. A third control portion of the electronic control unit controls the temperature of the heat generating unit in such a way that it stops or reduces the electric power supply to the heat generating unit, when it determines that the object has been brought into contact with a second region of the outer surface.

Abstract: A heater device includes a planar heat generating portion configured to generate heat when being energized, a detection circuit having a plurality of planar electrodes disposed on one surface side of the heat generating portion, and a controller configured to control an amount of energization to the heat generating portion based on a detection result of the detection circuit. The heat generating portion and the plurality of electrodes are disposed in parallel with each other. The heater device is configured to have a heat generating region in which the heat generating portion is present and a non-heat generating region in which the heat generating portion is not present when the plurality of electrodes and the heat generating portion are projected in a direction perpendicular to the plurality of electrodes and the heat generating portion. Furthermore, the plurality of electrodes include a heat-diffusion promoting portion provided to be included at least in the non-heat generating region.