Patent ID: 9574725
Date: 2017-02-21
CPC Classifications: F21L,F21S,F21V,H05B,Y02B

Claim:
1. A portable lighting device comprising: at least one artificial light source having a light power, the artificial light source having a voltage-to-current converter which is able to regulate the light power of the artificial light source accordingly to a given set point; an independent electrical power source having at least one rechargeable battery so as to supply electricity to the artificial light source via the voltage-to-current converter; and an electronic control box having at least one digital processing unit linked to auxiliary circuits that are connected to said independent electrical power source and to the voltage-to-current converter, said electronic control box communicating with said independent electrical power source to acquire information about an instantaneous residual capacity or to measure a voltage or current characteristics of said independent electrical power source to determine the residual instantaneous energy, wherein said electronic control box determines a main illumination set value having a constant illumination power from programming a desired light period, or to determine a lighting period set point from programming a constant illumination power, and wherein said electronic control box readjusts at any time a main programmed illumination set point as the user charges an illumination period or the illumination power set point during a main illumination phase, so as to establish a new lighting power set point transmitted to the voltage-to-current converter depending on residual energy of the independent electrical power source and the main programmed illumination period as soon as the user changes the illumination period set point or a new illumination period, depending on the residual energy of the independent electrical power source and the desired illumination power as soon as the user changes an illumination power set point.