Flat display device
US4928041A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1989 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Feb 6, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J31/126
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a flat display device with a faceplate (1) having either an outward curvature or bulging inwards under the action of atmospheric pressure, the device also comprising a planar deflection device (8) to deflect the electron beams (13, 14) in each line. With a view to obtaining a pure-color image, the deflection voltages are corrected according to the particular distance between the deflection device (8) and the faceplate (1), thereby ensuring that the electron beams (13, 14) will impinge only on the appropriate equidistant phosphor dots or strips (4). The formula for calculating the correction factor (K) is stated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.