Pulsed L.E.D. illumination apparatus and method

  • US 9,119,266 B1
  • Filed: 09/08/2014
  • Issued: 08/25/2015
  • Est. Priority Date: 03/19/1998
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising:

  • a device that includes an electronic camera configured to output an image signal;

    a measurement unit configured to measure a color balance of the image signal;

    a plurality of light-emitting diodes (LEDs) mounted to the device, wherein the plurality of light-emitting diodes includes one or more LEDs having a first characteristic spectrum and one or more LEDs having a second characteristic spectrum, wherein the first characteristic spectrum is different from the second characteristic spectrum;

    a control circuit, operably coupled to the measurement unit and to the plurality of light emitting diodes, wherein the control circuit controls a pulse characteristic to the one or more LEDs having a first characteristic spectrum in order to change a proportion of light output having the first characteristic spectrum to that having the second characteristic spectrum that is different than the first spectrum based at least in part on the measured color balance of the image signal.

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