Color cathode ray tube
US5909079A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1998 |
| Grant date | Jun 1, 1999 |
| Priority date | — |
| Expiry date | Jan 8, 2018 |
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 for 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 and having therein a plate electrode with a beam passing area. The electrodes are given different voltages, wherein D and S have values in a region where all of the following inequalities are satisfied; EQU S.ltoreq.5.0 EQU S<D, EQU and EQU 145.5.ltoreq.55S-20D S being a beam spacing in mm between central axes of the three adjacent electron beams at the main lens, and D being a dimension in mm related to a distance of a center of at least one of the in-line arrangement of the three electron beams to an inner edge of at least one of the two cylindrical electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.