Directional diffuser
US7460303B2 · kind B2 · utility
0Cited by
21References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2007 |
| Grant date | Dec 2, 2008 |
| Priority date | — |
| Expiry date | Jul 26, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A diffuser is disclosed which transmits or reflects incident light into a specific range of angles. In a preferred embodiment, this light is uniformly scattered throughout a cone of angles. The diffuser consists of two parts. The first part diffracts or reflects light into a specific offset angle. The second part, in the preferred embodiment, uniformly scatters the light through a range of angles, which is centered on the offset angle. The diffusers have utility in applications such as screens for wrist watches, computers, calculators, and cell phones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.