Display apparatus
US5986624A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1996 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Mar 26, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2329/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display apparatus employing a field emission type cathode includes an anode electrode, a first constant voltage source for applying a first constant voltage on the anode electrode, a phosphor element coated on the anode electrode, a gate electrode arranged for facing said phosphor element, a second constant voltage source for applying a second voltage lower than the first voltage to the gate electrode, a cathode electrode arranged for facing the phosphor element via the gate electrode, an insulator arranged for facing the phosphor element via the gate electrode, a current source electrically connected to the cathode electrode, and a cathode arranged on said cathode electrode for facing said phosphor element. The current value of the current source is controlled in proportion to a third voltage applied to the current source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.