naa a22 4500 510822282 CHVBK 20180411083539.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s12541-013-0136-5 doi (NATIONALLICENCE)springer-10.1007/s12541-013-0136-5 Design and fabrication of a light emitting diode-based diffuser sheet-less light guide plate for lighting applications [Elektronische Daten] [Yoon Park, Jae-Young Joo, ChaBum Lee, Sun-Kyu Lee] This paper presents the design and fabrication of a light emitting diode-based light guide plate to realize the diffuser sheet-less applications for an indoor lighting. The diffuser sheet has been used for distributing the luminous intensity in uniform over the target n area, but it leads to light loss and production cost. Here, a diffuser sheet-less LGP with high luminous efficiency and high spatial uniformity was designed by a Monte-Carlo ray tracing method and fabricated by an ultraprecision machining. Simulation results showed that the U-groove LGP has great potential to get rid of the diffuser sheet: efficiency of 70.5% (lm/lm) and uniform luminous intensity distribution of 145 at a viewing angle (C = 0) and 120 at a viewing angle (C = 90), respectively. From the measurement results, it agreed with the simulation results. Thus, it was confirmed that the proposed LGP shows a good performance in terms of efficiency and a wide luminous intensity distribution, and a possibility to substitute for a diffuser-based illumination system. Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg, 2013 Light guide plate nationallicence Light emitting diode nationallicence Diffuser sheet-free nationallicence Monte-Carlo ray tracing nationallicence Park Yoon School of Mechatronics, Gwangju Institute of Science and Technology, 123 Cheomdan-Gwagiro, Buk-gu, 500-712, Gwangju, South Korea aut Joo Jae-Young Korea Photonics Technology Institute, 1 Cheomdan-Benchiro 108, Buk-gu, 500-712, Gwangju, South Korea aut Lee ChaBum School of Mechatronics, Gwangju Institute of Science and Technology, 123 Cheomdan-Gwagiro, Buk-gu, 500-712, Gwangju, South Korea aut Lee Sun-Kyu School of Mechatronics, Gwangju Institute of Science and Technology, 123 Cheomdan-Gwagiro, Buk-gu, 500-712, Gwangju, South Korea aut International Journal of Precision Engineering and Manufacturing Korean Society for Precision Engineering 14/6(2013-06-01), 1017-1022 2234-7593 14:6<1017 2013 14 12541 https://doi.org/10.1007/s12541-013-0136-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12541-013-0136-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Park Yoon School of Mechatronics, Gwangju Institute of Science and Technology, 123 Cheomdan-Gwagiro, Buk-gu, 500-712, Gwangju, South Korea aut NATIONALLICENCE 700 1- Joo Jae-Young Korea Photonics Technology Institute, 1 Cheomdan-Benchiro 108, Buk-gu, 500-712, Gwangju, South Korea aut NATIONALLICENCE 700 1- Lee ChaBum School of Mechatronics, Gwangju Institute of Science and Technology, 123 Cheomdan-Gwagiro, Buk-gu, 500-712, Gwangju, South Korea aut NATIONALLICENCE 700 1- Lee Sun-Kyu School of Mechatronics, Gwangju Institute of Science and Technology, 123 Cheomdan-Gwagiro, Buk-gu, 500-712, Gwangju, South Korea aut NATIONALLICENCE 773 0- International Journal of Precision Engineering and Manufacturing Korean Society for Precision Engineering 14/6(2013-06-01), 1017-1022 2234-7593 14:6<1017 2013 14 12541 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer