Patent attributes
An LED luminaire comprises a rechargeable battery, LED array(s), multiple drivers, and a control circuit. The LED luminaire may be used to replace a fluorescent or a conventional LED lamp connected to AC mains. The multiple drivers comprise a first driver configured to charge the rechargeable battery, a second driver configured to convert a DC voltage from the rechargeable battery to light up the LED array(s) when a line voltage from the AC mains is unavailable, and a third driver configured to operate the LED array(s) when the line voltage from the AC mains is available. The control circuit is configured to manage the multiple drivers in a way that the second driver is disabled when the line voltage from the AC mains is available and that the first driver and the third driver are disabled when a rechargeable battery test is performed, without ambiguity and safety issues.
