Cathode ray tube with a focus mask wherein a cap layer formed on the insulating material
US6597093B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 2000 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Jan 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/0777
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A color cathode-ray tube (CRT) having an evacuated envelope with an electron gun therein for generating an electron beam is disclosed. The envelope further includes a faceplate panel having a luminescent screen with phosphor lines on an interior surface thereof. A focus mask, having a plurality of spaced-apart first conductive lines, is located adjacent to an effective picture area of the screen. The spacing between the first conductive lines defines a plurality of slots substantially parallel to the phosphor lines on the screen. Each of the first conductive lines has a substantially continuous insulating material layer formed on a screen facing side thereof. A plurality of second conductive lines are oriented substantially perpendicular to the plurality of first conductive lines and are bonded thereto by the insulating material layer. A cap layer is formed over the plurality of second conductive lines and the insulating material. The cap layer is a semiconducting layer that is used to prevent charge accumulation on the insulating material layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.