Development of algorithms for real-time estimation of smartphone surface temperature using embedded processor

In smartphone and tablet devices, surface temperature management is required to ensure safety for the prevention of burn injuries. Therefore, mobile devices must have a mechanism of functional restriction to control the surface temperature, but this in turn also leads to performance degradation. It is preferable to control the surface temperature under the safety threshold while minimally affecting performance. The surface temperature must therefore be known precisely and in real-time. In this study, algorithms were developed for smartphone surface temperature estimation within 1 °C of the root mean square (RMS) error using internal thermistor sensor data that can be executed on a smartphone's embedded processor using a negligible amount of resources.