Power Outage Safety Light Bulb

摘要

A lamp device with power outage sensing abilities to detect when a primary power source is interrupted and to energize primary LEDs when primary power source is ON, and to energize backup LEDs when the primary power source is OFF. The power outage sensing circuit may also detect a light switch condition allowing for greater efficiency in emergency power supply usage. A battery charging system may provide battery thermal protection and multiple charge rates to improve battery charging as a function of the temperature in the lighting device.

主权项

1. A system to detect a power loss condition, the system comprising:
a light housing having
a power coupling element configured to establish an electrical connection to a first power source;a first light source operatively connected to the power coupling element and configured to selectively emit light in a first operating mode;a battery configured to supply power to a second light source in a second operating mode;a signal amplifier configured to monitor a power condition at the first power source and send a first signal indicating a first power source condition and to monitor a light switch position and send a second signal indicating a light switch condition; anda controller in communication with the power coupling element, the battery, the first light source, and the second light source and configured to receive first and second signals generated by the signal amplifier, wherein the controller uses the first and second signals from the signal amplifier to determine operation of the first light source and the second light source.