Front panel for color television tubes
US4985658A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1989 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Jul 25, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/862
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed are a method for the fabrication of a color television tube as well as a front panel for trichromatic television tubes. The disclosure can be applied to the reception of high-definition television transmissions. According to the disclosure, the front panels designed for a high-definition television tube screen are elements of the group of surfaces defined by EQU Z=.SIGMA.(C(i).multidot.x.sup.j(i) .multidot.y.sup.k(i) EQU Z(i)=Co(i).multidot.F.sup.-(j(i)+k(i)-1) EQU 100.multidot.ABS(Zn-Z)<5.multidot.Zd where Z is the dimension of a surface of the group, Zn the dimension of a test surface and Zd the dimension of the maximum value of the dimension of the surface. Co corresponds to a reference surface of the group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.