Journal of the Optical Society of Korea

Optical Society of Korea (한국광학회)
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Wide Color Gamut Backlight from Three-band White LED

  • Kim, Il-Ku (Opto System Division, Samsung Electro-Mechanics Co., LTD) ;
  • Chung, Kil-Yoan (Opto System Division, Samsung Electro-Mechanics Co., LTD)
  • Received : 2007.05.21
  • Published : 2007.06.25
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Abstract

A Wide Color Gamut Backlight system was studied using a three-band white Light-Emitting Diode. A three-band white light-emitting diode (LED) was fabricated using an InGaN-based blue LED chip that emits 445-nm blue peak, and a green phosphor and red phosphor that emit 535-nm green and 621-nm red peak emissions, respectively, when excited by 450-nm blue light. Using for this three-band white LED, wide color gamut backlight unit (BLU) was attained. The luminance of BLU and CIE 1931 chromaticity coordinates was $1,700Cd/m^2$ and (0.337, 0.346). Color filter matching simulations for this configuration show that the three-band white LED backlight can be enhanced by up to 16% over conventional white LED backlight color gamut.

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References

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