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

Image Number 8 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
System and method for optimizing teams
Polyester resin for toner, electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming met
Image processing device, printing apparatus, image processing method, and method of producing printing apparatus
Case for electronic device
Systems and methods for tracking power modulation
Nucleic acids for cloning and expressing multiprotein complexes
Systems, methods, and computer readable media for providing information related to virtual environments to wireless devices
  Randomly Featured Patents
Thin film electrochemical cell for lithium polymer batteries and manufacturing method therefor
Facsimile machine and its security control method
System for intelligent C-plane switching in the digital enhanced cordless telecommunications system
Automatic breader/sifter unit
Semiconductor tester
Hybridization device, methods, and system using mixing beads
Street cleaning and herbicide applicator apparatus
Microstrip patch antenna with embedded detector
Optical waveguide device and fabricating method thereof
Reference voltage generation circuit with start-up circuit