Three gun color CRT which has three grids with the holes in the third grid shifted relative to the holes in first and second grids
US5399932A · kind A · utility
2Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1993 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Apr 28, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/4872
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electron beam for a color CRT is equipped with three cathodes such that three electron beams may be emitted therefrom. Three grids are provided with beam passing holes for each of the three electron beams and are positioned in the path of the electron beams. The beam passing openings of the third grid are shifted from alignment with the beam passing openings of the first and second grid by a degree sufficient to focus the three beams appropriately relative to a central focal axis of the electron gun.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.