Annulus scattering diffuser for reflective display
US8717660B2 · kind B2 · utility
2Cited by
7References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2012 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Jul 3, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This disclosure provides systems, methods and apparatus for enhancing the brightness and/or contrast ratio of display devices. In one aspect, the display devices can include an annular diffuser that is configured to scatter light into a ring shaped region. The annular diffuser can include a plurality of axicon lenses or holographic features. The reflective display can include an annular diffuser to shift the direction along which most of the modulated light is scattered away from the direction along which light is specularly reflected by the display devices to reduce specular glare and enhance brightness and/or contrast ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.