Cathode structure for emissive screen
US7759851B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2003 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Feb 18, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J3/022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to a triode type cathode structure comprising, in superposition, an electrode forming a cathode (13) and supporting means made of an electron emitting material in the form of a layer (14), an electrical insulation layer (11) and a grid electrode (15), an opening (12) formed in the grid electrode and in the electrical insulation layer exposing the means made of an electron emitting material. The means made of an electron emitting material (14) are located in the central part of the opening of the grid electrode (15), this opening being in the form of a slit and the means made of an electron emitting material exposed by the slit being composed of elements aligned along the longitudinal axis of the slit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.