Color television picture tube image screen having positive and negative misregistration tolerance conditions
US4100452A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1976 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Nov 2, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J31/206
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This disclosure depicts a color television picture tube having an evacuated envelope, an electron gun, a color selection electrode defining a pattern of electron beam passing apertures and a multi-color image screen. The image screen has a corresponding pattern of triads of red-light-emissive, blue-light-emissive and green-light-emissive phosphor elements. The elements are spaced each from one another by a light absorbing material. The tube is characterized by having within at least selected triads in said pattern of triads a first phosphor element and associated electron beam landing area with either a positive or negative tolerance condition. The remaining two phosphor elements and associated beam landing areas have an opposite tolerance condition to that obtained for the first phosphor element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.