Inkjet printhead with matched number of color channels and printhead modules
View Patent ↗An inkjet printhead having a plurality of color channels extending longitudinally along a length of the printhead. Each color channel comprises at least one row of nozzles and each nozzle in a same color channel ejects the same colored ink. The printhead has a plurality of printhead modules and the number of color channels is equal to the number of printhead modules.
1. An inkjet printhead having a plurality of color channels extending longitudinally along a length of the printhead, each color channel comprising at least one row of nozzles extending longitudinally along the printhead, each nozzle in a same color channel ejecting the same colored ink, wherein said printhead is comprised of a plurality of printhead modules and the number of color channels is equal to the number of printhead modules.
2. The inkjet printhead of claim 1 , wherein each color channel comprises a pair of nozzle rows.
3. The inkjet printhead of claim 2 , wherein the nozzle rows in the pair are transversely offset from each other.
4. The inkjet printhead of claim 1 , wherein said printhead is a stationary pagewidth printhead, and a print medium is fed transversely past said printhead.
5. The inkjet printhead of claim 1 , wherein at least one color channel has a different peak power requirement than other color channels.
6. The inkjet printhead of claim 1 , wherein the at least one color channel provides redundancy for at least one other color channel.
7. The inkjet printhead of claim 1 , wherein each printhead module comprises a respective segment of each nozzle row.
8. The inkjet printhead of claim 7 , configurable such that each of said printhead modules fires a segment from a different color channel, within a predetermined segment-time.
9. The inkjet printhead of claim 8 , wherein said segment-time less than or equal to a line-time divided by the number of nozzle rows, and wherein said line-time is defined as the time taken for said print medium to advance past said printhead by one line.
10. The inkjet printhead of claim 6 , configurable such that each segment in a nozzle row is fired sequentially.
11. The inkjet printhead of claim 1 , configurable such that a peak power requirement is equal to an average power requirement.
12. The inkjet printhead of claim 1 , wherein each printhead module is a printhead integrated circuit.
13. The inkjet printhead of claim 1 , wherein the printhead integrated circuits abut each other end-on-end to define the printhead.