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A study of violet LED chips and white LED lamps  

서종욱 (단국대학교 응용물리학과)
김창연 (단국대학교 응용물리학과)
김희수 (단국대학교 응용물리학과)
노승정 (단국대학교 응용물리학과)
Publication Information
Journal of the Korean Vacuum Society / v.12, no.4, 2003 , pp. 235-238 More about this Journal
Abstract
Conventional LED displays use pixels which consist of red, green and blue LEDs of different operation voltages and degradation characteristics. Thus, the circuits are complicated and the display of each color changes independently with the operated time. In order to solve these drawbacks, an LED chip of a short wavelength and an LED lamp with the mixture of red, green, blue fluorescencers and epoxy on the LED chip were studied. The fluorescencers are excited by the light of the LED chip. The LED chip has an active layer of InGaN, a peak wavelength of 408 nm, a FWHM of 13 nm and the CIE index of (0.198, 0.087). White LED lamps were obtained and the CIE index change was observed with the change of the epoxy amount added to the fluorescencers.
Keywords
Violet LED chip; fluorescencer; White LED lamp;
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