Patent ID: 7354269

Claim:
Electro-optical device for the photo-polymerization of composite materials, applicable in particular in the dental field, comprising: a light source ( 2 ) which is defined by an LED ( 20 ) or a group of LEDs, electronic power supply means comprising a battery ( 4 ) connected with a direct current/direct current converter device ( 7 ), passive means ( 3 ) for evacuation of heat, and a central management unit ( 5 ) for the operating parameters of the light source for the definition of a determined photo-polymerization energy profile, wherein, the direct current/direct current converter device ( 7 ) supplies control circuit by lowering the battery voltage, and the electronic power supply means comprises a circuit for control by shift register and cyclic ratio modulation to select and modulate the power of emission of each LED group, a direct polarization of the diodes by the output of the DC/DC converter by using the internal resistance of the diodes to provide a polarization voltage, a system for adjusting said polarization voltage in order to vary the supply current of the diodes and consequently the optical power, and an automatic correction of this polarization voltage by thermal servo-control in order to have available a constant output power.