Wireless light switch

Abstract: A domestic electrical switch system dispenses with wiring in the walls by providing that a switch unit is attached to the wall at any desired point and controls a control unit by radiated energy, the control unit being on a switchable domestic electrical appliance at any other desired point.

Abstract: A wireless load control system is provided including one or more wireless switch components and one or more load controller components optionally in one-to-one, many-to-many, many-to-one, and one-to-many wireless communication with each other. A wirelessly-controlled load controller assembly includes an enclosure adapted to fit within a junction box, the enclosure comprising a projecting fitting adapted to fit through an aperture of the junction box to maintain the enclosure in fixed relation to the junction box. A control circuit in the enclosure is provided with an antenna that extends through an antenna port that is disposed within the fitting so that when the load controller is mounted in a junction box, the antenna extends through the aperture of the junction box.

Abstract: This paper presents the development of wireless light switch system with primary signal carrier band in Sub- GHz. In contrast to conventional wired lighting system, wireless concept delivers much more efficient application in material budget, distance, simplicity and performance. At the other side, application may be better performed with Wi-Fi network of 2.4GHz in terms of worldwide popularity, however, 2.4GHz has more complicated protocol stack and limitation of power consumption as well as high traffic congestion. With the application of Sub-GHz band, these difficulties can be completely avoided, especially for the application of light switch system. Therefore this project implements the upsides of both frequency bands and protocols by integrating both of them in impressive way to achieve the excellence in product efficiency and performance.

Abstract: A wireless light switch harvests energy for ambient environment/space conditions and uses the harvested energy to energize low-power electronics. An exemplary application is for wireless control (ON/OFF or dimming) of light fixtures. The energy harvesting circuitry transduces ambient light to electricity and uses this energy to charge an energy storage device as well as power a wireless transmitter which can be triggered based on user interaction with an ON/OFF or Dim+/Dim− element. The wireless light switch with energy harvesting circuitry is paired with a wireless receiver circuit which can be connected to a light fixture that is to be controlled by the wireless light switch.