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
Optical navigation device with image sensor and inner housing
JTAG multiplexer with clock/mode input, mode/clock input, and clock output
Mobile communication terminal provided with handsfree function and controlling method thereof
Method and apparatus for re-routing calls in a packet network during failures
High performance design rule checking technique
Landscape post for solar and other light fixtures
Printed circuit board including electromagnetic bandgap structure
  Randomly Featured Patents
Oligonucleotides active against drug-resistant bacteria
Apparatus for transmitting a torque and sheet-processing printing machine
CD Rack with dual disc case holder
Memory mapped network access
Electrode arrangement for a fuel cell
Battery belt
Audio system for multipurpose automotive vehicles having a rear opening panel
Emergency release device for seat belt retractor
Partition-free multi-socket memory system architecture
Retinol derivatives and uses thereof