Journal of the Optical Society of Korea

Optical Society of Korea (한국광학회)
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Simulation and Fabrication of the Cone Sheet for LCD Backlight Application

  • Received : 2009.09.04
  • Accepted : 2009.09.13
  • Published : 2009.12.25
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Abstract

An optical sheet with a cone array is designed, simulated, and fabricated in order to substitute the dual crossed prism sheets in the edge-type LCD backlight. The optimum structure of cone textures that is compatible with the dual crossed prism sheets was obtained by simulating the backlight installed with the cone array optical sheet. A SU-8 photoresist films of thickness $30{\sim}50{\mu}m$ were spin-coated on a polyethylene terephtalate film (PET), and the cone texture array was formed by using the diffuse lithography that employed a photomask with circular patterns and an optical diffuser.

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References

  1. M. Anandan, “LCD backlighting,” SID '01 Seminar Lecture Notes F-2/1 (2001).
  2. I. K. Kim and K. Y. Chung, “Wide color gamut backlight from three-band white LED,” J. Opt. Soc. Korea 11, 67-70 (2007). https://doi.org/10.3807/JOSK.2007.11.2.067
  3. D. H. Lee, “Optimization design and analysis of LCD backlight unit,” M.S. Thesis, Yeungnam University (2006), pp. 11-13.
  4. J. H. Ko, “Recent research trends in the development of new light source for the backlight unit of liquid crystal display,” Asian J. Phys. 14, 231-237 (2005).
  5. G. Kurata, K. Sakurai, M. Ohira, Y. Kawabata, A. Funamoto, and A. Aoyama, “Sheetless backlight system for mobile phone,” in Proc. IDW '06 (Otsu, Japan, Dec. 2006), pp. 1727-1730.
  6. T. Susumu, “Liquid crystal display apparatus,” Japanese Patent 2000-284268 (2000).
  7. Y. Hira, “Optical film,” U.S. Patent 6,639,705 (2003).
  8. Y. H. Ju, J. H. Park, J. H. Lee, J. Y. Lee, K. B. Nahm, and J. H. Ko, “Study on the simulation model for the optimization of optical structures of edge-lit backlight for LCD applications,” J. Opt. Soc. Korea 12, 25-30 (2008). https://doi.org/10.3807/JOSK.2008.12.1.025
  9. J. H. Lee, H. S. Lee, B. K. Lee, W. S. Choi, H. Y. Choi, and J. B. Yoon, “Simple liquid crystal display backlight unit comprising only a single-sheet micropatterned polydimethylsiloxane (PDMS) light-guide plate,” Opt. Lett. 32, 2665-2667 (2007). https://doi.org/10.1364/OL.32.002665
  10. M. Brunet, T. O'Donnell, J. O'Brien, P. McCloskey, and S. C. Mathuna, “Thick photoresist development for the fabrication of high aspect ratio magnetic coils,” J. Micromech. Microeng. 12, 444-449 (2002). https://doi.org/10.1088/0960-1317/12/4/317
  11. Y. J. Chuang, F. G. Tseng, J. H. Cheng, and W. K. Lin, “A novel fabrication method of embedded microchannels by using SU-8 thick-film photoresists,” Sens. Actuators A 103, 64-69 (2003). https://doi.org/10.1016/S0924-4247(02)00325-4
  12. P. J. Caber, “Three-dimensional imaging by sub-Nyquist sampling of white-light interferograms,” Opt. Lett. 18, 1462-1464 (1993). https://doi.org/10.1364/OL.18.001462

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