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Light source having blue, blue-green, orange and red LED's

  • US 7,008,078 B2
  • Filed: 06/02/2004
  • Issued: 03/07/2006
  • Est. Priority Date: 05/24/2001
  • Status: Expired due to Term
First Claim
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1. An illumination light source comprising four types of light-emitting diodes,wherein the four types of light-emitting diodes are a first diode having an emission wavelength peak at 450 to 470 nm, a second diode having an emission wavelength peak at 510 to 540 nm, a third diode having an emission wavelength peak at 580 to 600 nm and a fourth diode having an emission wavelength peak at 625 to 650 nm.

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