Flat screen having individually dipole-protected microdots
US5920296A · kind A · utility
4Cited by
7References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1997 |
| Grant date | Jul 6, 1999 |
| Priority date | — |
| Expiry date | Jul 14, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2329/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flat screen field emission cathode is disclosed including microtips individually protected by means of a series electrical coupling with a dipole consisting of a depletion mode field effect transistor. The current-voltage characteristic of such a dipole is not linear. These dipoles can be obtained such that the protection threshold and current emission level, and therefore the brilliance of the screen, can be altered globally (on all tips at once) solely by acting on the biasing of the substrate common to these dipoles, or groups of dipoles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.