Shadow mask color display tube
US5099169A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1990 |
| Grant date | Mar 24, 1992 |
| Priority date | — |
| Expiry date | Apr 6, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J31/206
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Picture display device comprising an in-line color display tube of the shadow mask type having an elongate display screen with a short axis and a long axis, and comprising a deflection system. The plane in which the undeflected electron beams are located is parallel to the short axis of the display screen. The shadow mask has elongate apertures with longitudinal axes extending transversely to the short axis of the display screen. This configuration renders the picture display device less sensitive to unwanted displacements of the shadow mask in the direction transverse to the display screen, which is advantageous, particularly for display screen aspect ratios of more than 4:3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.