Color cathode ray tube with in-line electron gun
US5708322A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1996 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Jul 22, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/503
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A color cathode ray tube equipped with an in-line electron gun emitting three electron beams includes a main lens made up of two cylindrical electrodes arranged in a spaced relationship. Each of the electrodes has an opening of an elliptic cross section and therein a plate electrode with a beam passing area, and is given different voltages. The following inequalities apply: EQU 5.0>S, D>S, and 55S-20D.gtoreq.145.5, S is a beam spacing between adjacent electron beams, and D is the smaller dimension of either a diameter in a direction perpendicular to the in-line arrangement of three electron beams of the cross section of the opposing ends of the two cylindrical electrodes or twice the distance between a center of a side electron beam and an inner edge in a direction of the in-line arrangement of the three electron beams of the cross section of the opposing edge of the two cylindrical electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.