System for printhead pixel heat compensation
US6249299A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1999 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Mar 5, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/375
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal imaging system for compensating for the temperature dependent changes in thermal elements of a thermal printhead is disclosed. Specifically, the thermal imaging system generates a temperature or energy dependent profile of the resistances of each thermal element which makes up the thermal printhead. Based upon this profile, the imaging system estimates the resistances of thermal elements based upon a pixel density to be transferred to media. Based upon the estimated resistances, the imaging system adjusts the amount of energy to be applied to particular thermal elements for transferring a pixel having a density which more closely approximates the density of a corresponding pixel in a desired image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.