Multiplexing backlight with asymmetric turning film
US10955592B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Nov 2, 2017 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Nov 2, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133607
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The disclosure describes asymmetric turning films (ATFs) that may be used in conjunction with multiple light sources in a liquid crystal display assembly to provide multiple different characteristic output distributions of light. In some examples, the ATFs include a structured surface defining a plurality of microstructures having two or more faces with each face configured to reflect light in different directions. The microstructure may define a microstructure axis and an angle gradient characterizing the rotation of the microstructure axis across the structured surface of the ATF.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.