Teleprompter with directional screen
US6834968B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2001 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Sep 19, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A teleprompter configured to project an image to a viewer at a viewer location comprises a single-beam teleprompter projector, configured to project an image to a focal plane, and a directional screen, disposed at the focal plane. The directional screen is configured to direct the image to a focal point at the viewer location, and diffuse the image within a limited viewing region surrounding the focal point, such that the apparent brightness of the image to the viewer at the viewer location is increased, and the visibility of the image to persons other than the viewer is reduced. Because the device concentrates the light at the viewer, it can be made much larger than conventional video monitors typically used in speech-prompter settings, while still maintaining very high brightness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.