Baffled micro-optical elements for thin liquid crystal display backlight units

Patent metadata

Field	Value
Publication number	US-9507204-B2
Application number	US-201414316497-A
Country	US
Kind code	B2
Filing date	Jun 26, 2014
Priority date	Jun 26, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A light-emitting diode (LED) backlight unit includes a housing, an LED array disposed on a bottom surface of the housing, an optical film stack disposed on the LED array, and a baffled micro-optical element (BMOE) disposed between the LED array and the optical film stack. The thickness of the backlight unit is 12 mm or less, a first portion of light emitted from each LED of the LED array is configured to directly contact the optical film stack and a second portion of light emitting from each LED of the LED array is configured to be reflected off of the BMOE and onto the optical film stack, and the first and second portions of light combine to create surface illuminance on the optical film stack having a uniformity greater than 70%.

First claim

What is claimed is:

1. A light-emitting diode (LED) backlight unit, comprising:
a housing;
a LED array disposed on a bottom surface of the housing, the LED array comprising LEDs;
an optical film stack disposed on the LED array;
a baffled micro-optical element (BMOE) disposed between the LED array and the optical film stack,
wherein:
the thickness of the backlight unit is 12 mm or less;
a first portion of light emitted from each LED of the LED array is configured to dir…

Assignees

• Seoul Semiconductor Co Ltd

Inventors

• Pelka David G
• Tidd Meg

Classifications

• G02F1/133603

  Physics · mapped topic

• G02F2001/133607

  Physics · mapped topic

• G02F1/133605 Primary

  Physics · mapped topic

• G02F1/133606

  Physics · mapped topic

• G02F1/133607

  Physics · mapped topic