Abstract: A method for controlling a portable device, a display device, and a video system is provided. According to the method for controlling the portable device, the portable device transmits an application to the display device, the portable device and the display device execute the application, the portable device receives specific information from a user and transmits the specific information to the display device, and the display device controls an execution of the application according to the specific information. Therefore, a user may control a display device using a portable device.

Abstract: A heat variation detecting circuit, for use with a heat sensor in a microwave oven, comprises a heat sensor, temperature memorizing registers and control comparators. The temperature sensed by the heat sensor is converted via an A/D converter into a digital signal and is memorized in a present temperature register. A buffer register and a prior temperature register will then compare via at a comparator the present and prior temperatures to give a Reset or Enable signal at the comparator in accordance with coincidence or noncoincidence of the temperatures between the present and the prior temperatures in order to control a temperature error counter. The output of the temperature error counter together with the output of the presetting register controls a comparing unit for producing a signal for control of the Magnetron.