Current-regulated field emission cathodes for use in a flat panel display in which low-voltage row and column address signals control a much higher pixel activation voltage
US5357172A · kind A · utility
53Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 1993 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Feb 1, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a flat panel display in which low-voltage row and column address signals control a much higher pixel activation voltage by respectively gating at least one pair of series coupled MOSFETs to ground for each pixel, effective current regulation is achieved by placing a current-regulating resistor in series with each pair of the series-coupled MOSFETs. The resistor is coupled directly to ground and to the source of the MOSFET furthest from the emitter node. By coupling the current-regulating resistor directly to the ground bus, stable current values are achieved over a wide range of cathode voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.