Electron beam scanning display apparatus with cathode vibration suppression
US4812716A · kind A · utility
14Cited by
5References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1986 |
| Grant date | Mar 14, 1989 |
| Priority date | — |
| Expiry date | Apr 2, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a flat type cathode ray tube having one or plural parallel (vertical) line cathodes (10) and a plurality of scanning electrodes (12) consisting of insulated parallel (horizontal) metal strips, which are to be impressed with respective scanning pulses (FIG. 6, FIG. 21) to make vertical scanning of electron beams from the line cathodes: undesirable vibrations of the line cathode (10) are suppressed by touching wire-shaped dampers (28, 38A, 38B, 48, 64, 65) on the line cathode (10), and by selecting the frequency of the scanning pulses higher than natural vibration frequency of the line cathode (10).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.