The optical performances of 15-inch edge-lit backlight were simulated by using a Monte Carlo ray-tracing technique. The backlight model was built by combining a wedge-type light guide plate, a diffuser sheet, a tubular fluorescent lamp with a lamp reflector, and two crossed prism sheets. Angular distributions of the luminance on each optical component obtained from simulation were consistent with those obtained from experiments on a real 15-inch backlight. The constructed backlight model was used to evaluate the optical performances of a micro-pyramid film. It was found that the on-axis luminance gain on the pyramid film is higher than that on one prism film but much lower than that on the two crossed prism films. These results suggest that a reliable simulation model can be used to develop new hybrid films and to optimize the optical structure of edge-lit backlight in order to reduce the developmental period.

© 2008 Optical Society of Korea

1. J.-H. Ko, “Recent Research Trends in the Development of New Light Sources for the Backlight Unit of Liquid Crystal Display,” Asian J. Phys., vol. 14, pp. 231-237, 2005
2. M. Anandan, “LCD Backlighting,” SID "02 Seminar Lecture Notes, p. 169 (2002). J. H. Kim et al., “Twodimensionally integrated fluorescent lamp for 40 inch LCD-TV application,” IMID "04 Tech. Digest, pp. 795-798, 2004
3. J. Ha, J. Paek, T. Jang, and J. Choi, “A new costeffective optical plate for high performance LCD-TVs,” SDI "07 Digest, pp. 46-49, 2007
4. M. Tjahjadi, G. Hay, D. J. Coyle, and E. G. Olczak, “Advances in LCD backlight film and plate technology”, Information Display, vol. 10, no. 6, pp. 22-27, 2006
5. M. H. Lee, W. T. Moon, M. J. Kim, S. K. Lee, J. S. Yoon, Y. H. Jung, B. K. Jung, H. S. Soh, and B. C. Ahn, “New light collimation film (LCF) for direct-lit BLU system,” SDI "06 Digest, pp. 503-506, 2006
6. J.-Y. Lee, K.-B. Nahm, J.-H. Ko, and J. H. Kim, “Effects of Reshaping Micro-pyramids and Prisms on the Optical Performances of Light Collimating Films in the Field of LCD Backlight,” IDW "06 Digest, pp. 941-944, 2006
7. J.-H. Park, J.-Y. Lee, and J.-H. Ko, “Enhancement of on-axis luminance of flat fluorescent lamps (FFLs) by using micro-lens arrays,” IMID2007 Digest, pp. 965-968, 2007
8. Ji-Hee Park, Jung Ho Lee, Jin Ha Jeong, Kie-Bong Nahm, Jae-Hyeon Ko, and Joong Hyun Kim, “Optical Simulation Study on the Performances of Collimating Films for LCD Backlight Applications,” Hankook Kwanghak Hoeji, vol. 18, no. 6, pp. 4432-444, 2007
9. Breault Research Organization,“The ASAP Primer,” pp. 13-234~13-256, 2006
10. Jin Ha Jeong, Young Jin Kim, Ji-Young Lee, Ji-Hee Park, Jung Ho Lee, Kie-Bong Nahm, Jae-Hyeon Ko, and Joong Hyun Kim, (to be submitted)

Asian J. Phys.

• J.-H. Ko, “Recent Research Trends in the Development of New Light Sources for the Backlight Unit of Liquid Crystal Display,” Asian J. Phys., vol. 14, pp. 231-237, 2005

Hankook Kwanghak Hoeji

• Ji-Hee Park, Jung Ho Lee, Jin Ha Jeong, Kie-Bong Nahm, Jae-Hyeon Ko, and Joong Hyun Kim, “Optical Simulation Study on the Performances of Collimating Films for LCD Backlight Applications,” Hankook Kwanghak Hoeji, vol. 18, no. 6, pp. 4432-444, 2007

IDW ’06 Digest

• J.-Y. Lee, K.-B. Nahm, J.-H. Ko, and J. H. Kim, “Effects of Reshaping Micro-pyramids and Prisms on the Optical Performances of Light Collimating Films in the Field of LCD Backlight,” IDW "06 Digest, pp. 941-944, 2006

IMID2007 Digest

• J.-H. Park, J.-Y. Lee, and J.-H. Ko, “Enhancement of on-axis luminance of flat fluorescent lamps (FFLs) by using micro-lens arrays,” IMID2007 Digest, pp. 965-968, 2007

Information Display

• M. Tjahjadi, G. Hay, D. J. Coyle, and E. G. Olczak, “Advances in LCD backlight film and plate technology”, Information Display, vol. 10, no. 6, pp. 22-27, 2006

SDI ’06 Digest

• M. H. Lee, W. T. Moon, M. J. Kim, S. K. Lee, J. S. Yoon, Y. H. Jung, B. K. Jung, H. S. Soh, and B. C. Ahn, “New light collimation film (LCF) for direct-lit BLU system,” SDI "06 Digest, pp. 503-506, 2006

SDI ’07 Digest

• J. Ha, J. Paek, T. Jang, and J. Choi, “A new costeffective optical plate for high performance LCD-TVs,” SDI "07 Digest, pp. 46-49, 2007

SID ’02 Seminar Lecture Notes

• M. Anandan, “LCD Backlighting,” SID "02 Seminar Lecture Notes, p. 169 (2002). J. H. Kim et al., “Twodimensionally integrated fluorescent lamp for 40 inch LCD-TV application,” IMID "04 Tech. Digest, pp. 795-798, 2004

Other

• Breault Research Organization,“The ASAP Primer,” pp. 13-234~13-256, 2006
• Jin Ha Jeong, Young Jin Kim, Ji-Young Lee, Ji-Hee Park, Jung Ho Lee, Kie-Bong Nahm, Jae-Hyeon Ko, and Joong Hyun Kim, (to be submitted)

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