Abstract: The wireless relay system may include: at least one control target device installed in a home or an office; a smart device in which a specific App provided from an application market is downloaded and installed; and a wireless extender, which is connected with the at least one control target device through Infrared communication and connected with the smart device through Bluetooth communication or WiFi communication, matching control codes and specific codes requested by the specific App of the smart device and transmitting an IR signal corresponding to the control codes for controlling the at least one control target device.

Abstract: A system and a method of controlling an RF transceiver are provided. The system includes a key input unit for detecting a key selection, a memory unit storing control data required for operating the RF transceiver and a code table matching with a key value, a liquid crystal display (LCD) for displaying operational information of the RF transceiver, a controller for turning off the LCD that is in an on-state when a data transmitting/receiving request is detected from the key input unit and turning on the LCD when the data transmitting/receiving is completed, and an RF transmitting/receiving unit for modulating a transmitting signal, power-amplifying the transmitting signal, transmitting the amplified signal as an RF signal to an object device through an antenna, and receiving a response signal as an RF signal from the object device.

Abstract: The present invention is related to a standby power cut-off device that cuts off standby power generated from an electrical appliance by learning power on/off control data sent from a remote control, and upon receipt of the power on/off control data of the remote control, simultaneously controls commercial power (main power) supplied to the electrical appliance, and a control method thereof.

Abstract: The operational range of a wireless controller is extended by use of RF communications instead of or in addition to other signaling radiation such as infrared. Advantageously, power line communications technology is used to extract an RF signal from the power line of the device. The power line also is used as an antenna for a transceiver so as to minimize the size of the transceiver and to provide an improved antenna.

Abstract: A system and a method of controlling an RF transceiver are provided. The system includes a key input unit for detecting a key selection, a memory unit storing control data required for operating the RF transceiver and a code table matching with a key value, a liquid crystal display (LCD) for displaying operational information of the RF transceiver, a controller for turning off the LCD that is in an on-state when a data transmitting/receiving request is detected from the key input unit and turning on the LCD when the data transmitting/receiving is completed, and an RF transmitting/receiving unit for modulating a transmitting signal, power-amplifying the transmitting signal, transmitting the amplified signal as an RF signal to an object device through an antenna, and receiving a response signal as an RF signal from the object device.

Abstract: The remote controller has separate groups of channels, each accessible by means of a Favorite Channel Key. Channels preferably are grouped in accordance with a common characteristic, such as sports channels, movie channels, etc. One of several channels within each group can be selected by operation of the usual up/down channel controls on the remote control unit. When a Favorite Channel Key has not been actuated, the up/down controls are operative to scroll through all of the channels available to the television receiver.

Abstract: The present invention is directed to a battery modem using Short Range Wireless technology. A battery modem using a short range wireless technology in a data communication apparatus capable of performing wired/wireless data communication depending on whether a battery is mounted therein, wherein the battery modem detects base band communication data from a power supply line of the data communication apparatus on the basis of the short range wireless technology and a power line modem scheme, converts the data into an RF signal and transmits the RF signal to a data communication apparatus of the other party through a power supply line antenna, and the battery modem receives the RF signal from the power supply line antenna, converts the RF signal into the communication data and outputs the data to the data communication apparatus.