Browse > Article
http://dx.doi.org/10.3807/KJOP.2012.23.3.119

Optical Characteristics of Sheetless LCD Backlight Using Micro Reverse-pyramid Array  

Jeon, Hwa Jun (Department of Physics, Yeungnam University)
Lim, Gyo Sung (Department of Physics, Yeungnam University)
Gwag, Jin Seog (Department of Physics, Yeungnam University)
Kwon, Jin Hyuk (Department of Physics, Yeungnam University)
Publication Information
Korean Journal of Optics and Photonics / v.23, no.3, 2012 , pp. 119-123 More about this Journal
Abstract
The structure of an LCD backlight unit (BLU) was simplified by installing a micro reverse-pyramid array (MRPA) or a micro reverse-cone array (MRCA) on the top surface of the light guide panel (LGP) in order to eliminate the conventional diffuser sheet and the prism sheet. The optimum conditions of the MRPA and the MRCA in the new light guide panel were obtained through optical simulation. The change of the luminance and view angle that depend on the side angle, the height, and the length at the top of the MRPA and MRCA were studied. The optimized side angle and the view angle of the MRPA and MRCA were 59 and 57 degrees for the side angles and 68 and 64 degrees for the view angles, respectively.
Keywords
Backlight; Optical sheet; Microlens; Reverse-pyramid;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 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).   DOI
2 S. Y. Kim and O. K. Lee, "BLU special quality analysis that brightness changes by seat," in Proc. KIPE Annual Meeting (Chungmu Marina Resort, Korea, Jul. 2001), pp. 105-108.
3 S. I. Chang, J. B. Yoon, H. Kim, J. J. Kim, B. K. Lee, and D. H. Shin, "Microlens array diffuser for a light-emitting diode backlight system," Opt. Lett. 31, 3016-3018 (2006).   DOI
4 C. Y. Wu, T. H. Chiang, and C. C. Hsu, "Fabrication of microlens array diffuser films with controllable haze distribution by combination of breath figures and replica molding methods," Opt. Express 16, 19978-19986 (2008).   DOI
5 S. K. Hwang, S. H. Baek, J. H. Kwon, and Y. S. Park, "Fabrication of microlens array using photoresist thermal reflow," Korean J. Opt. Photon. (Hankook Kwanghak Hoeji) 20, 118-122 (2009).   DOI
6 S. H. Baik, S. K. Hwang, Y. G. Kim, G. J. Park, J. H. Kwon, W. T. Moon, S. H. Kim, S. H. Kim, B. K. kim, and S. H. Kang, "Simulation and fabrication of the cone sheet for LCD backlight application," J. Opt. Soc. Korea 13, 478-483 (2009).   DOI
7 K. H. Lee, S. H. Jee, S. H. Kim, Y. S. Yoon, and S. H. Kim, "Modeling for new type backlight units," Korean J. Opt. Photon. (Hankook Kwanghak Hoeji) 20, 41-45 (2010).
8 UTE Film (Miraenano Tech. Co., Ltd), http://www.mntech.co.kr.
9 H. S. Lee, J. H. Lee, B. K. Lee, W. S. Choi, H. Song, H. Y. Choi, and J. B. Yoon, "Monolithically fabricated micropatterned light guide plates for sheet-less backlight unit," in Proc. Asia Display, IDW 2007 (Sapporo International Conference Center, Sapporo, Japan, Dec. 2007), pp. 661-661.