Patent ID: 7679291
Filing Date: 2010-03-16
Classification: H05B

Abstract:
1. A flashing warning light apparatus including: at least one light-emitting diode located approximately at a focal point of one or more lenses, said lenses being adapted to disperse light from the light-emitting diode when the light-emitting diode is energized, and said lenses being adapted to focus ambient light on to the light-emitting diode when the light-emitting diode is not energized, a limited capacity power source, an integrated circuit (IC) adapted to selectively energize at least one light-emitting diode to effect a light output during at least one first time period, and at least one transistor adapted to detect a light-induced electrical signal generated by the at least one light-emitting diode due to ambient light focused on to the light-emitting diode in at least one second time period when said diode is not energized, wherein the light-induced electrical signal is provided to the IC by the at least one transistor, and wherein the IC is adapted to change at least the extent of energization of the at least one light-emitting diode in response to a selected level of light induced-electrical signal being detected in at least one period when said diode is not energized.