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
(4928
System for the secure management of digitally controlled locks, operating by means of crypto acoustic credentials
Electronic device including predicted frequency error estimation of a voltage controlled oscillator and related methods
Silicon-on-insulator (SOI) structure configured for reduced harmonics and method of forming the structure
Semiconductor memory device, test circuit, and test operation method thereof
Method and system for facilitating micropayments in a financial transaction system
Opioid-ketamine and norketamine codrug combinations for pain management
  Randomly Featured Patents
Method for continuously supplying plastics film strip from extruder head
Compact electrical adapter for mounting to a panel connector of a computer
Spacecraft antenna slew control systems
Method of fabricating single crystal silicon arrayed devices for display panels
Compact holographic display device
Disazo compounds and photoconductive composition as well as electrophotographic light sensitive element containing the same
Adaptive method and apparatus for forecasting and controlling neurological disturbances under a multi-level control
Fuel pressure activated engine compression braking system
Edging strip for tiled steps
Constant impedance bullet connector for a semi-rigid coaxial cable