Photometric color correction and control system for custom colors
US5897239A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1997 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Mar 31, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00755
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A system and method for color mixing control in a developing material-based electrostatographic printing system. A developing reservoir containing an operative solution of customer selectable colored developing material is continuously replenished with selectively variable amounts of basic color components making up the operative solution by controlling the rate of replenishment of various color components added to the supply reservoir. An optical sensor is used to measure the optical spectrum of the developed image so that the actual optical spectrum thereof can be brought into agreement with a target optical spectrum associated with a customer selectable color. The present invention may be used to mix a customer selectable color in situ, whereby approximate amounts of primary color components are initially deposited and mixed in the developing material reservoir and the resultant developed image is monitored and adjusted until the mixture reaches a target optical spectrum. An additional optical sensor may be used to control and maintain the color of the developing material in the reservoir through continuous monitoring and correction in order to maintain a particular ratio of col…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.