Color-picture tube with an arrangement to compensate for misregister
US4333037A · kind A · utility
2Cited by
0References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1980 |
| Grant date | Jun 1, 1982 |
| Priority date | — |
| Expiry date | Jan 25, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/96
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a color TV tube employing a shadow mask (4), this mask is heated during operation of the tube, and expands, thus causing impact misregistry errors of the electron beams (5) on the phosphor layer (2) of the tube. These misregistry errors are corrected according to the invention with the aid of temperature-dependent accelerating or decelerating fields between the mask (4) and a metal layer (3) deposited on to the phosphor layer (2). Temperature dependance of the fields is obtained by inserting temperature-dependent (PTC and NTC) resistors between the mask and the metal layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.