Displays with direct-lit backlight units
US11592706B2 · kind B2 · utility
0Cited by
13References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2021 |
| Grant date | Feb 28, 2023 |
| Priority date | — |
| Expiry date | Aug 23, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2202/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated with backlight illumination from a direct-lit backlight unit. The backlight unit may include an array of light-emitting diodes on a printed circuit board. The backlight unit may include first, second, and third light spreading layers formed over the array of light-emitting diodes. A color conversion layer may be formed over the first, second, and third light spreading layers. First and second brightness enhancement films may be formed over the color conversion layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.