Recording apparatus
US6198493A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1998 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Mar 19, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A dot data generator receives print data from a host apparatus and generates dot data from the print data. Dots have different diameters according to a gradation level. A drive frequency setting section sets a drive frequency in accordance with the print data. A drive signal generator generates a timing in timed relation with the drive frequency. A recording head is driven at the generated timing to form a plurality of dots on a print medium. An operation circuit determines a total drive time forming dots for each line in the main scanning direction. The drive frequency is set on a line-by-line basis in accordance with the total drive time. The timing may be delayed so that dots are formed always at accurate print positions irrespective of the scanning speed in the main scanning direction and in the sub scanning direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.