Baffled micro-optical elements for thin liquid crystal display backlight units
US9507204B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2014 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Jun 26, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133607
- WIPO fieldOptics
- WIPO sectorInstruments
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%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.