Dichroic combiner backlight used in a head mounted display
US10712775B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2016 |
| Grant date | Jul 14, 2020 |
| Priority date | — |
| Expiry date | May 16, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0114
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display (LCD) device including a backlight with an LED assembly. The LED assembly includes a dichroic combiner and two or more different color LEDs. A substrate of the dichroic combiner receives color light from multiple color LEDs at different input regions and propagating in different directions. Dielectric layers within the substrate selectively reflect or transmit the color light to spatially superimpose the color light, and output the color light in a particular direction at a light output region of the substrate. The light output regions of LED assemblies are arranged behind an LCD panel, along one or more edges, to illuminate the LCD panel. The LED assembly provides edge-lighting without requiring LED placement along the one or more edges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.