Printhead module having operation controllable on basis of thermal sensors

1. A printhead module having a plurality of nozzles for expelling ink, the printhead module including a plurality of thermal sensors, each of the thermal sensors being configured to respond to a temperature at or adjacent at least one of the nozzles, the printhead module being configured to modify operation of the nozzles in response to the temperature rising above a threshold,

wherein the printhead module is a thermal inkjet printhead module, each of the nozzles includes a thermal ink ejection mechanism, and each thermal sensor comprises at least part of one of the thermal inkjet mechanisms.

2. A printhead module according to claim 1 , wherein the modification includes preventing operation of the respective nozzle.

3. A printhead module according to claim 2 , wherein the modification includes preventing operation of the respective nozzle for a predetermined period.

4. A printhead module according to claim 1 , wherein the thermal sensor comprises a heating element.

5. A printhead module according to claim 4 , wherein the thermal sensor determines the temperature by determining a resistance of the heating element.

6. A printhead module according to claim 1 , configured to:

output thermal information from the at least one thermal sensor to a controller; and

receive control information back from the controller, the control information being indicative of the modification to make to the operation of the one or more nozzles.