Color cathode ray tube
US5793156A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1996 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Dec 30, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/0722
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A color cathode ray tube in which the structure of a shadowmask frame assembly is improved. The color cathode ray tube includes a panel, a funnel sealingly coupled to the panel, an electron gun installed in a neck portion of the funnel, a deflection yoke installed around a conical portion of the funnel, a shadowmask frame assembly including a shadowmask in which a multiplicity of electron beam passing holes are formed and a frame installed at an inner edge of the panel for supporting the shadowmask, and a heater for thermally expanding the frame in the same direction as the thermal expansion direction of the shadowmask. According to the color cathode ray tube, it is possible to stabilize an initial screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.