Patent ID: 8192039
Filing Date: 2012-06-05
Classification: H02J,Y10S

Abstract:
1. A light emitting diode (LED) backup system comprising: an LED backup controller operable to select from a plurality of power sources to supply electrical energy to a set of LEDs, the plurality of power sources comprising a primary power source and a battery, the LED backup controller adapted to be in selective electrical communication with the primary power source via a first electrical path, the LED backup controller adapted to be in electrical communication with the primary power source via a second electrical path, the second electrical path being a non-switchable electrical path, the LED backup controller operable to select the battery to supply electrical energy to the set of LEDs in response to a failure of the LED backup controller to electrically communicate with the primary power source via the second electrical path, the LED backup controller adapted to relay a first electric current, provided by an LED driver, to the set of LEDs when the primary power source is selected to supply electrical energy to the set of LEDs, the LED backup controller further comprising: a battery charger to provide electrical energy to charge the battery; and a status monitor to determine a status of the battery, wherein the status monitor comprises: a charge fault monitor to determine whether the charger has charged the battery to a predetermined charge level within a predetermined period of time, wherein the status monitor determines that the battery has a battery fault status when the charge fault monitor determines that the battery is unable to reach the predetermined charge level within the predetermined period of time, the predetermined period of time being a period of time determined prior to the status monitor determining the status of the battery, the predetermined charge level being a charge level determined prior to the status monitor determining the status of the battery.