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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