Abstract: An emergency exit indicator includes a light source, a visual indicator and a power line communication unit, wherein the visual indicator is disposed within the illumination scope of the light source, and the power line communication unit is electrically connected to the light source. The emergency exit indicator is capable of altering the displayed escape information. The present invention further provides an emergency exit indicating system using the above-mentioned emergency exit indicator and can more precisely display the escape information.

Abstract: A power supply system including a first power supply, a second power supply, a switch board, a relay device, and a control device is provided. The switch board is electrically connected to the first power supply, and the relay device is electrically connected to the switch board. The relay device includes a first solid state relay and a second solid state relay, which are electrically connected to the first power supply and the second power supply respectively. The control device includes a control unit and a first power line communication unit (PLC unit), in which the control unit is electrically connected to the second power supply, and the first PLC unit is electrically connected between the relay device and the second power supply, and the first PLC unit is electrically connected to the control unit.

Abstract: A load control module suitable for an electrical equipment is disclosed, wherein the electrical equipment is coupled to a switch. The load control module includes an energy storage unit, a microprocessor, and a pulse control unit. The energy storage unit still outputs a reserved voltage for a predetermined time when the switch is turned off. Besides, the energy storage unit switches the level of an indication signal according to the on/off state of the switch. Along with the change in the level of the indication signal, the microprocessor regulates the duty cycle of a modulation signal through different control methods respectively within and without a fine tuning time. Thereby, the load control module regulates the level of a control voltage according to the on/off state of the switch so as to achieve a diversified control function.

Abstract: A light emitting diode (LED) lamp including a lamp body, a current control circuit, a color temperature management unit electrically connected to the current control circuit, and an LED array disposed inside the lamp body. The LED array is electrically connected to the current control circuit. The LED array is capable of providing light having different color temperatures. The current control circuit drives the LED array to change color temperature thereof automatically in accordance with an output of the color temperature management unit.