Method and apparatus to correct power source voltage variation in an image forming system
US7116921B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 2004 |
| Grant date | Oct 3, 2006 |
| Priority date | — |
| Expiry date | Oct 20, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/80
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus to correct power source voltage variation in an image forming system. The apparatus to correct power source voltage variation includes: an image density sensing unit which senses an image density; a first variation correction unit which calculates a variation between a first power source voltage of the image density sensing unit and a first reference value, and performs correction by applying a correction amount, based on the calculated variation, to an image density sensed in the image density sensing unit; an environment detection value measuring unit which measures a roll resistance value for environment recognition; and a second variation correction unit which calculates a variation between a second power source voltage of the environment detection value measuring unit and a second reference value, and performs correction by applying a correction amount, based on the calculated variation, to a roll resistance value measured in the environment detection value measuring unit. Accordingly, when a predetermined analog value is measured to control an image density or a high voltage output, the power source voltage variation due to change in a power line or sys…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.