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김영섭(Y. S. Kim),김태훈(T. H. Kim),박소희(S. H. Park),최영희(Y. H. Choi),최은서(E. S. Choi),신용진(Y. T. Shin) 한국레이저가공학회 2007 한국레이저가공학회지 Vol.10 No.1
We propose a novel application of laser engraving to patterning of light guide panel (LGP) for backlight. The feasibility of three-dimensional engraved pattern in the LGP was verified by measuring brightness and uniformity. To improve the overall uniformity, we have modified proposed patterns and found improved design for patterns. The tailoring of pattern by using laser engraving method could endow the controllability of uniformity. The proposed LGPs are more efficient in both average brightness and uniformity of illumination than the conventional LGPs which have surface pattern on the panel.
김영섭(Y. S. Kim),최은서(E. S. Choi),신용진(Y. J. Shin) 한국레이저가공학회 2007 한국레이저가공학회지 Vol.10 No.1
We presented the proper laser processing conditions for the capillary line marking, which could be applied for the fabrication of injection needles. With changing the parameters such as lamp current, duty cycle and beam amplification factor of beam expander, we evaluated the processing performance considering amount of dross, processing efficiency and processed linewidth in the sample. We could carry out the proper line marking at the condition of 70% lamp current, duty cycle of 7-10% and 6-times amplification of beam diameter. To perform efficient line processing, the utilization of duty cycle of 12% at 80% lamp current was also preferred.