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US 2019/0029095 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 circuit is caused to provide a declining power supply to a light emitting diode (“LED”) as a power profile of the battery source declines.
Claims18
1:
- A method for increasing battery life in a lighting device powered by a battery source through an electronic circuit, comprising:
- causing the electronic circuit 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 circuit 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.
6:
- 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 to extend battery life of the battery source.
7:
- The method of claim 6 wherein the duty cycle is reduced towards an end of life of the battery source.
8:
- The method of claim 7 wherein the duty cycle gradually declines when the end of life of the battery source is reached.
9:
- The method of claim 8 wherein the end of life of the battery source is a low voltage for the measured battery voltage.
10:
- A lighting apparatus with a light emitting diode (LED) light source powered by a battery source through an electrical circuit, comprising:
- electronics for causing the electronic circuit to provide a declining power supply to the LED light source as a power profile of the battery source declines.
11:
- The lighting apparatus of claim 10 wherein the 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 circuit is reduced to extend battery life of the battery source.
12:
- The lighting apparatus of claim 11 wherein the duty cycle is reduced towards an end of life of the battery source.
13:
- The lighting apparatus of claim 12 wherein the duty cycle gradually declines when the end of life of the battery source is reached.
14:
- The lighting apparatus of claim 13 wherein the end of life of the battery source is a low voltage for the measured battery voltage.
15:
- The lighting apparatus of claim 10 wherein the 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 circuit is reduced to extend battery life of the battery source.
16:
- The lighting apparatus of claim 15 wherein the duty cycle is reduced towards an end of life of the battery source.
17:
- The lighting apparatus of claim 16 wherein the duty cycle gradually declines when the end of life of the battery source is reached.
18:
- The lighting apparatus of claim 17 wherein the end of life of the battery source is a low voltage for the measured battery voltage.