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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea


  • Vol. 11, Iss. 2 — Jun. 25, 2007
  • pp: 67–70

Wide Color Gamut Backlight from Three-band White LED

Il-Ku Kim and Kil-Yoan Chung  »View Author Affiliations

Journal of the Optical Society of Korea, Vol. 11, Issue 2, pp. 67-70 (2007)

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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 <TEX>$1,700Cd/m^2$</TEX> 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.

© 2007 Optical Society of Korea

OCIS Codes
(160.3710) Materials : Liquid crystals
(230.3670) Optical devices : Light-emitting diodes
(250.0250) Optoelectronics : Optoelectronics
(330.1730) Vision, color, and visual optics : Colorimetry

Original Manuscript: May 21, 2007
Revised Manuscript: June 14, 2007
Published: June 25, 2007

Il-Ku Kim and Kil-Yoan Chung, "Wide Color Gamut Backlight from Three-band White LED," J. Opt. Soc. Korea 11, 67-70 (2007)

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  1. Koichiro Kakinuma, "Technology of Wide Color Gamut Backlight with Light Emitting Diode for Liquid Crystal Television," Jpn. J. Appl. Phys. vol. 45, no. 5B, pp. 4330-4334, 2006 [CrossRef]
  2. Roy. S. Berns, Bilmeyer, and Saltzman"s Principles of Color Technology (Wiley-Interscience Publication) Chapter 2
  3. H. S. Koo, M. Chen, and P. C. Pan, "LCD-based color filter films fabricated by a pigment-based colorant photo resist inks and printing technology," Thin Soild Fims. 515. pp. 896-901, 2006 [CrossRef]
  4. H. Wu, X. Zhang, C. Guo, J. Xu, M. Wu, and Q. Su, "Three-Band White Light From InGaN-Based Blie LED Chip Precoated With Green/Red Phosphors," IEEE Photonics Technology Letters, vol. 17, no. 6, pp. 1160-1162, June 2005 [CrossRef]
  5. W. Y. Lee , T. K. Lim, and Y. W. Lee, I. W. Lee, "Fast Ray-tracing Methods for LCD Backlight Simulation using the Characteristics of the Pattern," Optical Engineering. 44(1), pp. 014004, January 2005 [CrossRef]

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