Back to results
US 2018/0027627 A1Published application
Portable Lighting Devices
AssigneeMag Instrument, Inc.
InventorsAnthony Maglica, Stacey West
Life of this patent
Estimating the term…
Abstract
A method for increasing battery life in a lighting device powered by a battery source in which an electronic switch is caused to provide a declining power supply to a light emitting diode (“LED”) as a power profile of the battery source declines.
Claims5
1:
- A method for increasing battery life in a lighting device powered by a battery source, comprising:
- causing an electronic switch to provide a declining power supply to a light emitting diode (“LED”) as a power profile of the battery source declines.
2:
- The method of claim 1 wherein electronics use a power profile for the battery source and a measured battery voltage of the battery source to determine when a duty cycle of the electronic switch is reduced.
3:
- The method of claim 2 wherein the duty cycle is reduced towards an end of life of the battery source.
4:
- The method of claim 3 wherein the duty cycle gradually declines when the end of life of the battery source is reached.
5:
- The method of claim 4 wherein the end of life of the battery source is a low voltage for the measured battery voltage.