Driving method of an ink-jet head
US6193343A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 17, 1998 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Dec 17, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink-jet head is formed by partitioning a plurality of ink chambers made from piezoelectric members from each other. Ink chambers which emit ink and dummy ink chambers which do not emit ink are arranged alternately, and ink is supplied to the ink chambers from a common ink chamber. This ink head is used to sequentially perform emission of an ink drop from the ink chambers for a plurality of times, to achieve gradation printing, while the emission speed of the ink drops is gradually increased such that ink drops emitted later are merged with ink drops emitted earlier thereby to form a one-dot liquid drop. In this case, where adjacent ink chambers with a dummy ink chamber inserted therebetween are simultaneously driven, timings of drive pulse voltages q1 and q2 applied to both of the adjacent ink chambers are shifted from each other such that the pressure in one of the adjacent ink chambers is decreased when the pressure in the other of the adjacent ink chamber is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.