Multimedia field emission device projection system
US5669690A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1995 |
| Grant date | Sep 23, 1997 |
| Priority date | — |
| Expiry date | Oct 3, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection system is constructed using a field emission device 10. A single monochrome FED 10 can be used with projection system electronics 40 and lens 20 to create a monochrome picture on screen 30. Alternatively, a single monochrome FED 10 can project the proper image through color wheel 150 to create a color image which is projected by a lens 20 onto a separate surface 30. In yet another embodiment, a first FED 10 which projects a red image, a second FED 10 which projects a green image, and a third FED 10 which projects a blue image, and three clear focusing lenses 20 create a full color image on screen 30. In this configuration, if the three lenses 20 are colored red, green and blue, then the three FEDs 10 need only present the image data for each color in black, grey, and white. The FED projection system could also utilize a color FED 10 and a clear focusing lens 20 to create a full color image on screen 30. This full color FED 10 could create its color image by using red, green, and blue phosphor stripes 90 which are energized by its cathode 80 configured with full pixels or sub pixels 160. In another embodiment the FED projection system provides a three-dimensional displa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.