Image forming apparatus, method of calculating amount of toner transfer, methods of converting regular reflection output and diffuse reflection output, method of converting amount of toner transfer, apparatus for detecting amount of toner transfer, gradation pattern, and methods of controlling toner density and image density
US7139511B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 12, 2004 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Apr 3, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0177
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An amount of toner transfer on a reference pattern is calculated by using an optical detecting unit that detects both regular reflection light and diffuse reflection light from a detection target simultaneously, based on a relative ratio between a value obtained by subtracting a result of multiplying a “diffuse reflection output” by a “minimum value of a ratio between a regular reflection output and the diffuse reflection output” from the “regular reflection output” of the density detection reference pattern, and a value obtained by subtracting a result of multiplying the “diffuse reflection output” by a “minimum value of a ratio between the regular reflection output and the diffuse reflection output” from the “regular reflection output” in the background of a transfer belt or an intermediate transfer body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.