Hybrid fresnel lens with reduced artifacts
US10133076B2 · kind B2 · utility
1Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2016 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Sep 13, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens defined by a first lens surface and a second lens surface opposite to the first lens surface is disclosed. A first portion of the first lens surface is defined by a smooth surface profile function, and a second portion of the first lens surface is defined by a Fresnel surface profile function. The second portion of the first lens surface is around the first portion of the first lens surface. Also disclosed is a display device that includes the lens and an array of light emitting devices coupled with the lens for outputting light through the lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.