Patent ID: 8551104

Claim:
A dermatologic treatment apparatus that is cordless and sufficiently compact as to be hand-held, comprising: (a) a self-contained housing configured for gripping by a person's hand for cordless manipulation in a dermatologic treatment procedure; (b) a light source comprising one or more diode laser bars each having a plurality of emitters within the housing; (c) direct drive electrical circuit within the housing comprising one or more batteries and an electronic control circuit for directly energizing the light source to produce output light pulses; and (d) a light path within the housing including an aperture through which the output light pulses are propagated out of the housing having properties that provide efficacious treatment; (e) wherein the cordless apparatus has a total weight of no more than one kilogram, (f) wherein the cordless apparatus occupies no more than 1500 cm 3 of volume, and (g) wherein the one or more batteries supply a battery voltage Vbat, and the electronic control circuit comprises one or more field effect transistors (FETs) and a voltage supply, wherein the voltage supply drives the gates of the FETs at a voltage greater than the battery voltage Vbat.