Fluorescent display tube
US5095244A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1989 |
| Grant date | Mar 10, 1992 |
| Priority date | — |
| Expiry date | Nov 29, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2231/1255
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a fluorescent display tube suitable for use in a large screen display. The present invention enables the fluorescent segments R, G and B to be arranged at positions close to a peripheral side wall (13) of the tube (1) by, particularly, enlarging a range to which electron beams can impinge and eliminating the influence of electric field near the glass wall of the fluorescent display tube. Upon this, light emitting area can be increased to obtain bright display and distances between adjacent fluorescent segment R, G and B trios of adjacent fluorescent display tubes (1) and between adjacent trios in each fluorescent display tube (1) are made small to thereby shorten the arranging pitch of the fluorescent trios as a whole in a large screen display device, improving resolution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.