Cathode ray tube having color selection apparatus
US6836062B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2003 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Jul 12, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/076
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cathode ray tube including a tube realized through a face panel, a funnel, and a neck; a color selection apparatus including a shadow mask having a an effective area with apertures and a mask frame supporting the shadow mask; an electron gun mounted in the neck and emitting electron beams; a deflection apparatus generating a magnetic field to deflect the electron beams; and a moire compensation circuit performing moire compensation, wherein the color selection apparatus satisfies the following condition, where Ko and Ke are K values respectively at a center point and a horizontal end of the effective area, andwherein K satisfies the following condition, where DL and Pv are respectively a vertical length and a vertical pitch of the apertures, and Bs and Ps are respectively a vertical diameter and a vertical pitch of the electron beams landing on the effective area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.