Electron gun for CRT
US5281896A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1992 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Aug 31, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/51
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electron gun for a color cathode ray tube includes cathodes, a control electrode and a screen electrode which form a front triode, first, second, third, fourth and fifth focus electrodes which form a plurality of auxiliary electrostatic lenses, and a final accelerating electrode installed adjacent to the fifth focus electrode to form a main electrostatic lens, wherein vertically-elongated electron beam passing holes are formed on the fourth focus electrode, a predetermined focus voltage is applied to the first, second and fifth focus electrodes, a dynamic focus voltage lower than the focus voltage and synchronized with a deflection synchronizing signal is applied to the fourth focus electrode, a static voltage higher than the focus voltage is applied to the second focus electrode, and an anode voltage higher than the focus voltage is applied to the final accelerating electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.