Resources Contact Us Home
Method and apparatus for constant light output pulsed L.E.D. illumination

Image Number 10 for United States Patent #7393119.

An illumination source includes a plurality of LEDs, and an electrical circuit that selectively applies power from the DC voltage source to the LED units, wherein the illumination source is suitable for handheld portable operation. In some embodiments, the electrical circuit further includes a control circuit for driving the LEDs with electrical pulses at a frequency high enough that light produced has an appearance to a human user of being continuous rather than pulsed, the control circuit changing a pulse characteristic to adjust a proportion of light output having the first characteristic color spectrum output to that having the second characteristic color spectrum output. Some embodiments provide an illumination source including a housing including one or more LEDs; and a control circuit that selectively applies power from a source of electric power to the LEDs, thus controlling a light output color spectrum of the LEDs.

  Recently Added Patents
Method and system for cooling of integrated circuits
Mobile target system
Case for electronic device
Vehicle control apparatus
Nitrogen-doped carbon-supported cobalt-iron oxygen reduction catalyst
Classifying documents using multiple classifiers
Nickel-cobalt-manganese multi-element lithium ion battery cathode material with dopants and its methods of preparation
  Randomly Featured Patents
Brake interface module
Biothermal power source for implantable devices
Sand control agent and process
Rack mount for a rack and pinion carriage moving mechanism
Window component extrusion
System and apparatus for allowing data of a module in power saving mode to remain accessible
Fuel injector pressurized by engine cylinder compression
Shirred pants and process for producing the same
Process for the production of fuel alcohol, without vinasse
Oxo-titanylphthalocyanine crystal, method for producing the same and electrophotographic photoreceptor