Browse > Article
http://dx.doi.org/10.14775/ksmpe.2020.19.04.030

Manufacturing of Wedge-type Light Guide Plates for Large Liquid Crystal Displays  

Kim, Min-Soo (Department of Mechanical Engineering, Graduate School of Kumoh National Institute of Technology)
Kim, Jangseob (Department of Mechanical Engineering, Graduate School of Kumoh National Institute of Technology)
Hong, Jun-Ho (Department of Mechanical Engineering, Graduate School of Kumoh National Institute of Technology)
Shin, Dongwon (Department of Mechanical System Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.19, no.4, 2020 , pp. 30-35 More about this Journal
Abstract
The light guide plate (LGP) provides a surface light source on the back of the liquid crystal display (LCD), which is not self-emitting; thus, it is an essential component of display units requiring sufficient brightness. To maximize the light-emitting effect of an LGP, enough incident light, from the light source, should enter into its side. However, the current trend in LCD panels is represented by larger and thinner screens and this smaller thickness prevents the accordingly thin LGPs from providing sufficient brightness. This paper proposes a process for manufacturing wedge-type LGPs, which might increase the amount of incident light and, consequently the surface light emission, for applications in large LCDs. The proposed method was validated by building a dedicated manufacturing machine and performing illuminance experiments on the fabricated LGP.
Keywords
Liquid Crystal Display(LCD); Back Light Unit; Light Guide Plate; Wedge-type; Ultra Violet Resin;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Lee, G. S., Jeong, J. H., Yoon, S. J., Choi, D. H., "An integrated design approach for Light Guide Panel (LGP) of Back Light Unit (BLU) to improve the Optical Performance of Liquid Crystal Display (LCD)," In Proceedings of the KSME Conference. The Korean Society of Mechanical Engineers, pp. 1048-1052, 2008.
2 Sah, J. Y., Park, J. R., "Analysis on Optical characteristics of LCD Backlight LGP," Transactions of the Korean Society of Mechanical Engineers, Vol. 28, No. 4, pp. 362-369, 2004.   DOI
3 Kwon D. H., Jang M. H., "Light Guide of Back Light Unit and its Manufacturing Method," Republic of Korea Patent No. 10-1051291.
4 Lee M. R., Park J. H., "Method for Manufacturing Wedge Type Light Guide Plate for Back Light and the LGP," Republic of Korea Patent No. 10-1685055.
5 Park, S. H., Choi, E. S., Ahn, S. Y., Shin, Y. J., "Research Trends in Light Guide Plates for LED Backlight Units," Korean Journal of Optics and Photonics, Vol. 28, No. 6, pp. 314-326, 2017.   DOI
6 Lee, J. W., Park, M. K., Kim, J. H., "A Study of Brightness and Residual Stresses Depending on Thickness of LCD Light Guide Plate," Journal of the Korean Society for Precision Engineering, Vol. 25, No. 9, pp. 38-44, 2008.
7 Bae, C. H., Heo, K. C., Jhun, C. G., Rvu, B. J., Koo, K. W., "Design and fabrication of pattern structures of the light guide plate for enhanced brightness of backlight unit," The Transactions of The Korean Institute of Electrical Engineers, Vol. 64, No. 2, pp. 310-314, 2015.   DOI
8 Gong, T., Choi, G. J., Kwon, J. H., Park, I. S., Lee, S., Woo, D., Gwag, J. S., "Optical Design of Light Guide Plate Material for Slim Liquid Crystal Display," Journal of the Korean institute of surface engineering, Vol. 47, No. 5, pp. 233-238, 2014.   DOI
9 Lee, J. H., Nahm, K. B., Ko, J. H., Kim, J. H., "Optimization of optical structure of lightguide panel for uniformity improvement of edge-lit backlight," Korean Journal of Optics and Photonics, Vol. 21, No. 2, pp. 61-68, 2010.   DOI