Patent ID: 11271421

Abstract:
A light-emitting diode (LED) luminaire comprising an emergency-operated portion is used to replace a luminaire operated only in a normal mode with alternate-current (AC) mains. The emergency-operated portion comprises a rechargeable battery with a terminal voltage, a self-diagnostic circuit, and a transceiver circuit. The LED luminaire can auto-switch from the normal mode to an emergency mode or the other way around according to availability of the AC mains and whether a rechargeable battery test is initiated. The self-diagnostic circuit comprises timers and is configured to provide sequences and to auto-evaluate battery performance according to the sequences with the terminal voltage examined and test results stored. The LED luminaire further comprises a remote controller. When the remote control signals are initiated by the remote controller with phase-shift keying (PSK) signals transmitted, the transceiver circuit can demodulate such PSK signals and subsequently send commands to the self-diagnostic circuit to request responses accordingly.