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 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
Methods of making a diagnostic device by interweaving hydrophobic and hydrophilic fibers, and diagnostic device therefrom
Audio conversation apparatus
Mobile tablet information handling system support
Remote controller
Automated processing machine used for processing samples placed on slides and having an output device
Granulated sweetening composition
Luminescent substrate for liciferase
  Randomly Featured Patents
Abnormality detecting device of vehicle
Arm rest device
Glycopegylated erythropoietin
High speed signal level converting circuit having a reduced consumed electric power
Method for inhibiting neoplastic cells and related conditions by exposure to substituted N- arylmethyl and heterocyclmethyl-1H-pyrazolo (3,4-B) quinolin-4-amines
Scorer apparatus
Test device for traction and compression on a test piece after atmosphere re-entry simulation
High frequency magnetic thin film, composite magnetic thin film and magnetic device using them
Elastomeric composition for tire treads
Hand-held labeler