Patent ID: 7186000
Filing Date: 2007-03-06
Classification: F21L,F21Y,H04B,H04N,H05B,Y02B,Y10S

Abstract:
1. A method of providing changeable illumination of such compact size and low weight as to be suitable for single-handed portable operation by a user, comprising: providing one or more LEDs in a housing, the LEDs having a first characteristic color spectrum output and one or more LEDs having a second characteristic color spectrum output, wherein the first characteristic color spectrum output is different from the second characteristic color spectrum output; selectively applying pulsed power from a DC-battery-powered voltage source to the LEDs, wherein the pulses are of high-enough frequency such that the human eye does not perceive the pulses; projecting light to illuminate an object separate from the housing; and changing a pulse characteristic of the pulsed power in order to change a proportion of light output having the first characteristic color spectrum output to that having the second characteristic color spectrum output.