Flat panel type display and method for driving the display
US5117159A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1989 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | Nov 3, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J31/124
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flat panel type display provided with a screen, control electrodes divided in a horizontal direction of the screen, light emitting fluorescent material formed on the control electrodes, a mesh-like electrode, scanning electrodes each divided in a vertical direction of the screen and facing the mesh-like electrode, an electron source for generating electron beams in the horizontal direction of the screen and deflection unit for deflecting the beams in the vertical direction. The deflection unit is provided with a signal supply device for applying first and second voltage levels to each scanning electrode. The first voltage level is at a level similar to that applied to the control or mesh-like electrode. The second voltage level is substantially less than the first voltage level. The second voltage level is sequentially applied to each scanning electrode during a vertical scan, for a fixed time period at least as long as the time required for vertically scanning a distance in which a path of an electron reflected from a position of beam incidence with the fluorescent material becomes substantially parallel to the scanning electrodes. The time period between the start of each seque…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.