Compensating for capacitance changes in piezoelectric printhead elements
US8870325B2 · kind B2 · utility
2Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2011 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Apr 28, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/04588
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In an embodiment, a method of compensating for capacitance change in a piezoelectric element of a fluid ejection device includes sensing a current driving a piezoelectric element, determining from the current that capacitance of the piezoelectric element has changed, and altering a rise time of the current driving the piezoelectric element to compensate for the changed capacitance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.