Ink jet printhead identification circuit and method
US6719397B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2003 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Feb 7, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/17546
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides an ink jet printhead identification circuit and method. The identification circuit is constructed of a fuse and other electronic components. A plurality of circuits are arranged and integrated on the printhead of the cartridge and encoded prior to leaving the factory subjecting the identification and detection circuits to achieve its identification purpose (of identifying general information of the cartridge, such as model number, serial number, color or gray-scale setting, and best printing quality). The circuits may alternatively be encoded subsequent to leaving the factory and usage to a certain state subjecting the identification circuits to achieve its detection purpose (of detecting the current status of the cartridge, such as whether its lifespan has elapsed).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.