Electron source, image-forming apparatus comprising the same and method of driving such an image-forming apparatus
US6760002B2 · kind B2 · utility
4Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2002 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | Oct 25, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2329/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electron source comprises a plurality of electron-emitting devices and a drive means for driving the devices. The drive means applies a voltage above a threshold level to selected ones of the plurality of electron-emitting devices according to an image signal to cause the selected devices to emit electrons. The drive means also applies a voltage pulse for bringing the plurality of electron-emitting devices into a high resistance state. The voltage pulse for bringing into a high resistance state has a polarity reverse to that of the voltage for causing electron emission and has a voltage rising rate of greater than 10 V/sec.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.