Direction selective projection display screen
US10691010B2 · kind B2 · utility
1Cited by
27References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 22, 2017 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | May 22, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3147
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection screen with micro lenses or micro mirrors for the purpose of suppressing ambient light by means of a patterned layer stack including at least a polarizer and a quarter wave retarder. The projection screen has a surface structure where light from a projector is focussed at positions where the light can escape from the structure and is optionally diffused. The location of the focus positions depends upon the incident angle of the light coming from the projector, and therefore the screen is tailored for a certain projector configuration and projector light direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.