Abstract
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.
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Park, Y.K., Joo, JY., Lee, C. et al. Design and fabrication of a light emitting diode-based diffuser sheet-less light guide plate for lighting applications. Int. J. Precis. Eng. Manuf. 14, 1017–1022 (2013). https://doi.org/10.1007/s12541-013-0136-5
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DOI: https://doi.org/10.1007/s12541-013-0136-5