Method and apparatus for generating a dot clock signal for controlling operation of a print head
US6076922A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1997 |
| Grant date | Jun 20, 2000 |
| Priority date | — |
| Expiry date | Dec 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0994
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An ink jet printer includes an image transfer drum and a print head for ejecting drops of ink toward the image transfer drum as the drum rotates relative to the print head undergo. A control mechanism controls operation of the print head relative to rotation of the drum in response to a dot clock signal. The control mechanism includes a position encoder which generates an encoder signal at a frequency dependent on rotation of the image transfer drum and a digital phase locked loop circuit which receives the encoder signal and generates the dot clock signal at a frequency equal to the frequency of the encoder signal multiplied by a rational number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.