Printer comprising a printhead and at least two printer controllers connected to a common input of the printhead

1. A printer comprising:

a printhead comprising at least a first elongate printhead module, the at least one printhead module including at least one row of print nozzles for expelling ink; and

at least first and second printer controllers configured to receive print data and process the print data to output dot data to the printhead, wherein the first and second printer controllers are connected to a common input of the printhead.

2. A printer according to claim 1 , including at least one synchronization means between the first and second printer controllers for synchronizing the supply of dot by the printer controllers.

3. A printer according to claim 1 , configured such that the first and second printer controllers sequentially provide the dot data to the common input.

4. A printer according to claim 1 , further including a second printhead module, the printer being configured such that: the first printer controller outputs dot data to both the first printhead module and the second printhead module; and the second printer controller outputs dot data only to the second printhead module.

5. A printer according to claim 4 , wherein the printhead modules are configured such that no dot data passes between them.

6. A printer according to claim 4 , wherein each of the printer controllers is configurable to supply the dot data to printhead modules of a plurality of different lengths.

7. A printer according to claim 1 , wherein the printhead is a pagewidth printhead.

8. A printer according to claim 1 , comprising:

a printhead comprising first and second elongate printhead modules, the printhead modules being parallel to each other and being disposed end to end on either side of a join region;

at least first and second printer controllers configured to receive print data and process the print data to output dot data to the printhead, wherein the first printer controller outputs dot data only to the first printhead module and the second printer controller outputs dot data only to the second printhead module, wherein the printhead modules are configured such that no dot data passes between them.

9. A printer according to claim 1 , comprising:

a printhead comprising first and second elongate printhead modules, the printhead modules being parallel to each other and being disposed end to end on either side of a join region, wherein the first printhead module is longer than the second printhead module;

at least first and second printer controllers configured to receive print data and process the print data to output dot data to the printhead, wherein: the first printer controller outputs dot data to both the first printhead module and the second printhead module; and the second printer controller outputs dot data only to the second printhead module.

10. A printer according to claim 1 , comprising:

a printhead comprising first and second elongate printhead modules, the printhead modules being parallel to each other and being disposed end to end on either side of a join region, wherein the first printhead module is longer than the second printhead module;

at least first and second printer controllers configured to receive print data and process the print data to output dot data for the printhead, wherein: the first printer controller outputs dot data to both the first printhead module and the second controller; and the second printer controller outputs dot data to the second printhead module, wherein the dot data output by the second printer controller includes dot data it generates and at least some of the dot data received from the first printer controller.

11. A printer according to claim 1 , including a printer controller for sending to a printhead:

dot data to be printed with at least two different inks; and

control data for controlling printing of the dot data;

the printer controller including at least one communication output, each or the communication output being configured to output at least some of the control data and at least some of the dot data for the at least two inks.

12. A printer according to claim 1 , including a printer controller for supplying print data to at least one printhead module capable of printing a maximun of n of channels of print data, the at least one prithead module being configure into:

a first mode, in which the prithead module is configured to receive data for a first number of the channels; and

a second mode, in which the printhead module is configured to receive print data for a second number of the channels, wherein the first number is greater than the second number;

wherein the printer controller is selectively configurable to supply dot data for the first and second modes.

13. A printer according to claim 1 , including a printer controller for receiving first data and manipulating the first data to produce dot data to be printed, the print controller including at least two serial outputs for supplying the dot data to at least one printhead.

14. A printer according to claim 1 , including a printer controller for supplying data to a printhead module for receiving dot data to be printed using at least two different inks and control data for controlling printing of the dot data, the printhead module including a communication input for receiving the dot data for the at least two colors and the control data.

15. A print engine comprising:

a carrier;

a printhead carried by the carrier, the printhead comprising at least a first elongate printhead module, the at least one printhead module including at least one row of print nozzles for expelling ink; and

at least first and second printer controllers carried by the carrier, the first and second printer controllers configured to receive print data and process the print data to output dot data to the printhead, wherein the first and second printer controllers are connected to a common input of the printhead.

16. A printer according to claim 15 , including at least one synchronization means between the first and second printer controllers for synchronizing the supply of dot by the printer controllers.

17. A printer according to claim 15 , configured such that the first and second printer controllers alternately provide the dot data to the common input.

18. A printer according to claim 15 , further including a second printhead module, the printer being configured such that: the first printer controller outputs dot data to both the first printhead module and the second printhead module; and the second printer controller outputs dot data only to the second printhead module.

19. A printer according to claim 18 , wherein the printhead modules are configured such that no dot data passes between them.

20. A printer according to claim 18 , wherein each of the printer controllers is configurable to supply the dot data to printhead modules of a plurality of different lengths.

21. A printer according to claim 15 , wherein the printhead is a pagewidth printhead.

22. A printer comprising:

a printhead comprising at least a first elongate printhead module, the at least one printhead module including at least first and second rows of print nozzles for expelling ink; and

at least first and second printer controllers configured to receive print data and process the print data to output dot data to the printhead, wherein the first and second printer controllers are connected to the printhead to supply data for the first and second rows of nozzles, respectively.

23. A printer according to claim 22 , including at least one synchronization means between the first and second printer controllers for synchronizing the supply of dot by the printer controllers.

24. A printer according to claim 22 , wherein the printhead modules are configured such that no dot data passes between them.

25. A printer according to claim 22 , wherein the printhead is a pagewidth printhead.