Rolled projection screen
US9557632B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2013 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Mar 12, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49828
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A roller projection screen, including a projection screen material having a reflective front surface, onto which an image may be projected, and a back surface. The projection screen material is secured to a roller at an upper edge of the material and the projection screen material can be rolled in a spiral fashion in multiple layers around the roller. A buffer material is secured to the roller or to the back surface of the projection screen material so as to be adjacent the back surface and so as the be interposed between at least some of the multiple layers of the projection screen material when the projection screen material is rolled about the roller so as to inhibit ladder marks in the projection screen material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.