Light guide blade with color balancing structures and blue absorption compensation for large screen LED backlight unit
US8089583B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2009 |
| Grant date | Jan 3, 2012 |
| Priority date | — |
| Expiry date | Sep 7, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0036
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
One or more embodiments of the present invention provide apparatuses, methods and systems to form a thin LED backlight unit for a large-screen flat-panel display. The backlight unit is able to achieve improved color mixing within a shorter mixing distance than the conventional art, while maintaining desired brightness uniformity, thereby allowing for a shorter bezel of a display device. One or more embodiments of the present invention include one or more light guides, which, by operating together, provide thin backlight units. High system efficiency is provided by introducing a recycling enhancement component, and uniform color distribution is achieved by incorporating color shift compensation. Multiple light guides are arranged adjacent to one another can offer a progressive scan illumination feature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.