CRT monitor with elimination of unwanted time variable electric field
US5198729A · kind A · utility
16Cited by
2References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1992 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Jul 2, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/185
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Unwanted electric fields in the area in front of a CRT can be produced by flyback voltage pulses which occur across the horizontal deflection coils and are coupled to the inner DAG coating of the CRT. The unwanted fields can be eliminated by providing voltage pulses equal and opposite to the causative voltage pulses and applying the provided voltage pulses to the inner coating and the anode button, leaving no fields to be cancelled in the relevant area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.