Characteristics adjustment method of image forming apparatus, manufacturing method of image forming apparatus and characteristics adjustment apparatus of image forming apparatus
US6888519B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2002 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | May 9, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J31/127
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is provided a characteristic adjustment method for an image forming apparatus that is provided with a multi-electron source in which a plurality of electron-emitting devices are electrically connected by wiring and arranged on a substrate and a fluorescent member for emitting light by irradiation of an electron beam, the method including: a measurement step of dividing a display portion of the image forming apparatus into a plurality of areas and measuring light emitting characteristics of at least one or more of the electron-emitting devices in the respective divided areas, and a shifting step of shifting the light emitting characteristics of the electron-emitting devices in the divided areas to individual characteristic target values by applying a characteristic shift voltage to the electron-emitting devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.