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.

© 2011 Optical Society of Korea

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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
  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).
    [CrossRef]
  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).
    [CrossRef]
  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).
    [CrossRef]
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    [CrossRef]
  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).

2011

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).
[CrossRef]

2010

2009

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).
[CrossRef]

S. Kobayashi, S. Mikoshiba, and S. K. Lim, LCD Backlights (John Wiley & Sons Inc., California, USA, 2009), Chapter 14.

2007

2006

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.

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).
[CrossRef]

G. T. Lee, "Backlight unit," Korean Patent 2006-0028895 (2006).

2005

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).

C. M. Ju, "Light module for LCD panel," U. S. Patent 6871973 (2005).

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).

2004

W. Folkerts, "LED backlighting concepts with high flux LEDs," in Proc. SID "04 Digest (Seattle, USA, May 2004), pp. 1226-1229.

2003

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).
[CrossRef]

R. S. West, G. D. Gray, and J. W. Stewart, "Side emitting light emitting device," Lumiled Lighting, U. S. Patent 6598998 (2003).

Asian J. Phys.

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).

IEEE Photon. Technol. Lett.

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).
[CrossRef]

J. Korean Phys. Soc.

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).
[CrossRef]

J. Opt. Soc. Korea

Journal of the Korean Physical Society

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).
[CrossRef]

Journal of the Optical Society of Korea

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).
[CrossRef]

Jpn. J. Appl. Phys.

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).
[CrossRef]

Opt. Express

Proc. SID '04 Digest

W. Folkerts, "LED backlighting concepts with high flux LEDs," in Proc. SID "04 Digest (Seattle, USA, May 2004), pp. 1226-1229.

Proc. SID '06 Digest

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.

Other

G. T. Lee, "Backlight unit," Korean Patent 2006-0028895 (2006).

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).

S. Kobayashi, S. Mikoshiba, and S. K. Lim, LCD Backlights (John Wiley & Sons Inc., California, USA, 2009), Chapter 14.

C. M. Ju, "Light module for LCD panel," U. S. Patent 6871973 (2005).

R. S. West, G. D. Gray, and J. W. Stewart, "Side emitting light emitting device," Lumiled Lighting, U. S. Patent 6598998 (2003).

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