Color image forming apparatus
US6711364B2 · kind B2 · utility
17Cited by
16References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 20, 2002 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Sep 20, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04722
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Compensation patterns are formed on a conveyer belt. Sensors detect the compensation patterns and output a signal. A frequency component that is above the frequency that corresponds to the compensation patters is cut off by a filter. The positions of the compensation patters are determined based on the output of the filter. The filter is, for example, an IIR type digital filter. A correction value is calculated based on the determined positions of the compensation patters. A driver is controlled based on the correction value. As a result, images of different colors can be matched accurately.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.