Image density control apparatus and method for controlling image density on a photoconductor surface
US5499079A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1993 |
| Grant date | Mar 12, 1996 |
| Priority date | — |
| Expiry date | Dec 9, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00054
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image density control apparatus for controlling an image density on a photoconductor surface has a charger for charging the photoconductor surface uniformly. A laser beam is scanned over the photoconductor surface to form a standard latent image having an electric potential distribution on the photoconductor surface. A potential detector detects an electric potential distribution of the standard latent image, and a developer develops a standard toner image from the standard latent image. A density detector detects a density of the standard toner image. Based on the detected electric potential distribution and the detected density, an appropriate gradation correction data is selected. The appropriate gradation correction data is selected by first selecting a gradation correction table group in accordance with the detected electric potential distribution and second selecting a gradation correction data from the gradation correction table group in accordance with the detected density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.