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Light emitting device and display

  • US 20010001207A1
  • Filed: 12/15/2000
  • Published: 05/17/2001
  • Est. Priority Date: 07/29/1996
  • Status: Active Grant
First Claim
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1. A light source system comprising a light source (702), an optical guide plate or lens (704) and/or a coating (701, 710) containing a color converting material, wherein said light source (702) comprises a nitride compound semiconductor represented by the formula INiGajAlkN where 0≦

  • i, 0≦

    j, 0≦

    k and i+j+k=1 including InGaN and GaN doped with various impurities emitting blue light with a main emission peak set within the range from 400 nm to 530 nm, wherein said optical guide plate or lens (704) and/or said coating (701, 710) filter(s) by absorption a first part of the blue light coming from said light source (702), transmit(s) a second part of the blue light coming from said light source (702), convert(s) the absorbed blue light to a new light of longer wavelength and blend(s) this new light to the transmitted part of the blue light coming from said light source (702), so as to radiate a light combination; and

    wherein said optical guide plate or lens (704) is used to receive light on one surface and to emit light in a planar state at an other surface.

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