Portable electronic device and processor control method

A processor control method comprising:

• obtaining, by a portable electronic device, a measured value of temperature from a temperature sensor, the temperature sensor being encased in a housing of the portable electronic device;
• calculating, by the portable electronic device, an estimated value of surface temperature of the housing using the measured value and a first heat transfer model when a touch sensor, which is able to detect touching to a surface of the housing, has not detected the touching, and calculating the estimated value using the measured value and a second heat transfer model when the touch sensor has detected the touching;
• and
• decreasing, by the portable electronic device, an upper limit for a clock frequency of a processor encased in the housing when the estimated value is higher than or equal to a threshold, and increasing the upper limit for the clock frequency when the estimated value is lower than the threshold.

A non-transitory computer-readable recording medium storing a computer program that causes a computer provided in a portable electronic device to perform a process comprising:

• obtaining a measured value of temperature from a temperature sensor, the temperature sensor being encased in a housing of the portable electronic device;
• calculating an estimated value of surface temperature of the housing using the measured value and a first heat transfer model when a touch sensor, which is able to detect touching to a surface of the housing, has not detected the touching, and calculating the estimated value using the measured value and a second heat transfer model when the touch sensor has detected the touching;
• and
• decreasing an upper limit for a clock frequency of a processor encased in the housing when the estimated value is higher than or equal to a threshold, and increasing the upper limit for the clock frequency when the estimated value is lower than the threshold.