Method of driving ink jet recording head
US6799821B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2001 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Apr 19, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/04593
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
To enable fine droplets of a diameter smaller than a nozzle diameter to be stably ejected at a high driving frequency. The present invention relates to a method for driving an ink jet recording head which method applies a driving voltage to a piezoelectric actuator 4 to change a pressure in a pressure generating chamber 2, thus ejecting ink droplets 1 through a nozzle 7 in communication with the pressure generating chamber 2. A waveform of the driving voltage comprises a first voltage changing process for applying a voltage in a direction that inflates the pressure generating chamber 2, a second voltage changing process for then applying a voltage in a direction that compresses the volume of the pressure generating chamber, a third voltage changing process for applying a voltage in a direction that inflates the volume of the pressure generating chamber 2 again, and voltage changing times t2 and t3 during the second and third voltage changing processes are set to have such lengths as shown below, relative to a resonance frequency Tc of a pressure wave generated in the pressure generating chamber 2: 0<t2<Tc/2 and 0<t3<Tc/2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.