Browse > Article
http://dx.doi.org/10.3807/JOSK.2011.15.3.272

Improvement of Color and Luminance Uniformity of the Edge-Lit Backlight Using the RGB LEDs  

Son, Chang-Gyun (Department of Physics, Yeungnam University)
Yi, Jong-Hoon (Department of Physics, Yeungnam University)
Gwag, Jin-Seog (Department of Physics, Yeungnam University)
Kwon, Jin-Hyuk (Department of Physics, Yeungnam University)
Park, Gyeung-Ju (Department of Optometry, Sunlin University)
Publication Information
Journal of the Optical Society of Korea / v.15, no.3, 2011 , pp. 272-277 More about this Journal
Abstract
The effect of the M-window color mixing bar on the characteristics of color mixing and hot spots in the edge-lit backlight employing red (R), green (G), blue (G) light emitting diodes (LED) were studied in terms of the structure of the M-window color mixing bar. The rays from RGB LEDs entering the M-window bar were mixed by internal reflection and scattering inside the M-window bar so that the hot spots and color separation were minimized. The M-window bar was designed and fabricated and the simulation results are matched quite well to experimental data.
Keywords
Display; LED; Hot spot; Color separation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By Web Of Science : 6  (Related Records In Web of Science)
Times Cited By SCOPUS : 3
연도 인용수 순위
1 K. Kakinuma, "Technology of wide color gamut backlight with light-emitting diode for liquid crystal display television," Jpn. J. Appl. Phys. 45, 4330-4334 (2006).   DOI
2 J.-H. Ko, "Recent research trends in development of new light sources for the backlight unit of liquid crystal display," Asian J. Phys. 14, 231-237 (2005).
3 I. Kim and K. Chung, "Wide color gamut backlight form three-band white LED," J. Opt. Soc. Korea 11, 67-70 (2007).   DOI   ScienceOn
4 S.-T. Hur and S.-W. Choi, "An edge-lit backlight unit for small portable liquid crystal displays with a newly designed single pyramid sheet," J. Korean Phys. Soc. 58, 392-395 (2011).   DOI   ScienceOn
5 B. Kim, J. Kim, W.-S. Ohm, and S. Kang, "Eliminating hotspots in a multi-chip LED array direct backlight system with optimal patterned reflectors for uniform illuminance and minimal system thickness," Opt. Express 18, 8595-8604 (2010).   DOI
6 H. Y. Ryu and D. H. Kim, "High-brightness phosphor-conversion white light source using InGaN blue laser diode," J. Opt. Soc. Korea 14, 415-419 (2010).   과학기술학회마을   DOI   ScienceOn
7 J. K. Sheu, S. J. Chang, C. H. Kuo, and Y. K. Su, L. W. Wu, Y. C. Lin, W. C. Lai, J. M. Tsai, G. C. Chi, and R. K. Wu, "White-light emission from near UV InGaN-GaN LED chip precoated with blue/green/red phosphors," IEEE Photon. Technol. Lett. 15, 18-20 (2003).   DOI   ScienceOn
8 R. S. West, G. D. Gray, and J. W. Stewart, "Side emitting light emitting device," Lumiled Lighting, U. S. Patent 6598998 (2003).
9 G. Park, T. S. Aum, and J. H. Kwon, "Characterization and modeling light scattering in diffuser sheets," J. Korean Phys. Soc. 54, 44-48 (2009).   과학기술학회마을   DOI   ScienceOn
10 Y.-H. Lu and C.-H. Tien, "A novel direct-led-backlight unit using grooved hexagonal light-guide plate," in Proc. SID '06 Digest (San Francisco, USA, Jun. 2006), pp. 1513-1516.
11 S. Kobayashi, S. Mikoshiba, and S. K. Lim, LCD Backlights (John Wiley & Sons Inc., California, USA, 2009), Chapter 14.
12 C. M. Ju, "Light module for LCD panel," U. S. Patent 6871973 (2005).
13 W. Folkerts, "LED backlighting concepts with high flux LEDs," in Proc. SID '04 Digest (Seattle, USA, May 2004), pp. 1226-1229.
14 G. T. Lee, "Backlight unit," Korean Patent 2006-0028895 (2006).
15 J. H. Min, M. G. Lee, S. M. Lee, J. H. Kim, and J. S. Choi, "Backlight Unit," U. S. Patent 6,979,095 (2005).