P-83: Side-emitting LED for Ultra-Thin Direct LED Backlight

Abstract

A LED direct backlight system with ultra‐thin thickness by employing side emitting LEDs is proposed. The lens cap on the LEDs is with metal reflection coating to re‐direct the light to emit from the side of LED. Prior to this method, the light mixing cavity of a LED Backlight module is thicker than 50mm for obtaining uniform illumination. By using the proposed LED package, a 30mm thick light mixing cavity of a 32″ LED backlight is realized. The simulation and experiment of the illumination performance are also demonstrated.

64.1: The Thin and Slim Design for 65‐inch UHD OLED TV

“…The requirements are in trade-off with the unit volume because a heat sink and a light guide plate tend to become bulky to fulfill the requirements. It is a challenging task for an LCD to design the backlight unit concise and realize thin and slim module design [8][9][10][11].…”