Pulse width modulation for correcting non-uniformity of acoustic inkjet printhead
US6299272A · kind A · utility
24Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1999 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Oct 28, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/14322
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An acoustic inkjet printhead utilizes a pulse width modulation to control droplet size or ejection velocity. An individual control pulse controls the duration and the time a RF signal is applied to each transducer. To modify the RF signal of each transducer, the pulse width of each control signal can be modified according to a predetermined correction data. The rising edge of the control data is delayed according to the correction data while the falling edge is kept the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.