Cathode-ray tube
US6680565B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2001 |
| Grant date | Jan 20, 2004 |
| Priority date | — |
| Expiry date | Dec 30, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/862
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cathode ray tube includes a faceplate panel having a substantially flat exterior surface and a substantially concave interior surface having a phosphor screen, and a shadow mask behind the faceplate panel wherein the panel satisfies the following condition:1.2R≦Rp≦8R where Rp is a curvature radius of the concave interior surface and R is 1.767×a diagonal width of an effective screen of the cathode ray tube.The shadow mask has an effective electron beam-passing area having a plurality of apertures, wherein the shadow mask satisfies the following condition:0.6≦(Rs/Rp)×(PH/S/PH/C)≦1.25where Rs is a curvature radius of the shadow mask, PH/C is a horizontal pitch of the apertures formed on a central portion of the shadow mask, and PH/S is a horizontal pitch of the apertures formed on a peripheral portion of the shadow mask.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.