MULTICOLOR LIGHT EMITTING DIODE TREATMENT SYSTEM WITH UNIFORM ILLUMINATION

摘要

Illumination of the skin by substantial, monochromatic light emitted by LEDs, produces positive therapeutic effects for the treatment of a wide variety of skin conditions. Arrays of LEDs comprising multiple emission colors are preferred light sources for these applications, however, achieving uniform and efficient illumination of a skin target area in close proximity is difficult due to the point-like emission and narrow divergence of lensed LEDs. An illumination apparatus and method, provides a LED system that produces uniform and efficient illumination by combining a well-distributed computed arrangement of each of the LED colors on the array, to enhance the spatial overlap of individual LED outputs across the target area with a diffuse secondary reflector between the LEDs having high reflectivity to further enhance illumination uniformity by allowing light to bounce between LED array panels and the skin.

主权项

1. A method for arranging at least two colors of light emitting diodes (LEDs) for phototherapeutic treatment, the method comprising the steps of:
a) selecting a first number of LEDs for a first emission color and at least one second number of LEDs for at least one next emission color; b) selecting a random arrangement of the first number and the at least one second number of LEDs for a set of locations; c) calculating a first weighted sum of distances between each LED of the first color; d) calculating at least one next weighted sum of distances between each LED of the at least one next color; e) obtaining a figure of merit by summing the first weighted sum with the at least one next weighted sum; f) switching a placement of two randomly selected LEDs; g) recalculating a new figure of merit; h) if the new figure of merit is increased, maintaining the placement, if the new figure of merit is decreased, reverting to an original placement of the two randomly selected LEDs; i) switching a next placement of two next randomly selected LEDs; and j) repeating steps c) through h) until no further increase on a next figure of merit is calculated.