Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Organoruthenium compound for chemical deposition and chemical deposition process using the organoruthenium compound
Coaxial connector
Modulation of Hepatitis B virus (HBV) expression
Motion estimation method
Semiconductor memory device and semiconductor system including the same
Device for decelerating sheets to be placed on a stack, especially paper or cardboard sheets
Refrigerator having folding shelf
  Randomly Featured Patents
Container
Center device
Head portion of a ratchet wrench
Frame extender
Loading mechanism for negative pressure sliders
Method of manufacturing hydrogen-absorbing alloy electrode
Razor having thermo-electric shaving aid ejection system and method of ejecting shaving aid
Method for adhering a floor covering to a floor with a floor adhesive
Integrated circuit device, and method of fabricating same
Process for the preparation of 1,2,3-thiadiazol-5-yl ureas