Abstract: An aspect of the disclosure relates to a power-saving control system using remote-control communication. In this power-saving control system, a remote-control transmitting device is embedded in one of a lighting device, a sensor, and a sensor-embedded program switch, which are installed in a space, so as to remotely control a control target device installed in the corresponding space, and a predetermined control signal such as a power-off command is transmitted to the control target device if no person exists in the space for a predetermined time, or if a measured temperature or the like satisfies a condition, such that the control target device can be remotely controlled.

Abstract: The present invention relates to a power line communication system of a closed circuit, which can transmit and receive a large amount of information in a speedy way compared with a conventional technique by creating predetermined information in a method of cutting off the power supplied to the power line near a zero cross of the power while varying the length of the power cut section near the zero cross and assigning information to the varying length and, at the same time, greatly improve a recognition rate and accuracy of a communication signal even for a load of a large capacity by configuring a switch unit by connecting a first switch and a second switch to a transmission unit in parallel and creating and transmitting a communication signal selectively using the switches.

Abstract: The present invention relates to a power line communication system for a large capacity load which greatly improves the recognition ratio and accuracy of a communication signal even for a large capacity load in that it: includes a switch unit as a transmission means wherein a first switch made of semiconductor elements and a second switch made of relay elements are connected in parallel; and generates and transmits a communication signal by selectively using the switches.

Abstract: The present invention relates to a power line communication system for a large capacity load which greatly improves the recognition ratio and accuracy of a communication signal even for a large capacity load in that it: includes a switch unit as a transmission means wherein a first switch made of semiconductor elements and a second switch made of relay elements are connected in parallel; and generates and transmits a communication signal by selectively using the switches.