13 March 2013 Novel micro-dots design to resolve Hotspot appeared on ultra-slim LEDs backlight
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Abstract
The LGP (Light guide plate) plays a key role of the backlight in LCD module. It determines the efficiency and uniformity of the whole backlight unit (BLU). With decreasing thickness in panel system and reduced quantity of LEDs, the Hotspot issue becomes more and more serious. We proposed a virtual light field of LEDs embedded inside the LGP for non-sequential ray-tracing. Two semi-analytical formulations are conducted to optimize the micro-dots’ distribution when LGP is with mirrored or corrugated entrance plane. The ultra-slim LGPs fabricated by solid-state laser and diamond-ruling machine show excellent elimination of the Hotspot phenomenon.
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Wei-Ping Chan, Modie Tsai, Yu-Ren Chiou, Chih-Sheng Jao, "Novel micro-dots design to resolve Hotspot appeared on ultra-slim LEDs backlight", Proc. SPIE 8607, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XVIII, 860716 (13 March 2013); doi: 10.1117/12.2003285; https://doi.org/10.1117/12.2003285
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