Field emission displays having a light-blocking layer in the extraction grid
US6278229A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1998 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Jul 29, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J31/127
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A display apparatus includes a substrate and a plurality of emitters formed on the substrate. The apparatus also includes a dielectric layer formed on the substrate. The dielectric layer includes a plurality of openings each formed about one of the plurality of emitters. The dielectric layer and extraction grid together have a thickness, measured perpendicular to the substrate, similar to a height of the emitters above the substrate. The apparatus also includes an extraction grid formed on the dielectric layer. The extraction grid is formed substantially in a plane of tips of the plurality of emitters and includes openings each formed about and in close proximity to a tip of one of the plurality of emitters. The extraction grid includes germanium so that photons incident on exposed portions of the extraction grid are absorbed and are not transmitted to depletion regions associated with the emitters. This reduces distortion in operation of the display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.