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
Apparatus for preventing overcharge of a battery
Variable delay line for delay locked loop
Image sensor pixels with junction gate photodiodes
Calendar integration methods and systems for presentation of events having combined activity and location information
Particle-loaded membrane for solid-phase-extraction and method for performing SALDI-MS analysis of an analyte
LED lamp including heat dissipator
Sound producing apparatus for vehicle
  Randomly Featured Patents
Substituted methyl isopropyl cyclohexenones, organoleptic uses thereof and process for preparing same
Heddle frame actuating apparatus with flexure spring
Web accumulator
Suture anchor system for joining pieces of tissue and instrument for inserting an anchor implant
Process and device for operating an exhaust gas burner
Apparatus for forming silicon oxide film and method of forming silicon oxide film
Hand-held vacuum cleaner with a detachable head
Fluid flow direction detection
Integrated Ag-SnO alloy electrical contact materials
Method and system for creating and deploying a mesh network