Patent ID: 8109592

Claim:
A liquid-ejecting head comprising: a substrate; a liquid cell configured to contain an ejection medium; a nozzle in communication with the liquid cell and configured to eject the ejection medium in the liquid cell; an energy unit on the substrate configured to supply ejection energy to the ejection medium in the liquid cell, the energy unit being driven to eject the ejection medium from the nozzle in a droplet form; and heating means located in the liquid-ejecting head and configured to heat the liquid cell with a direct current independently of the supply of the ejection energy to the ejection medium in the liquid cell to generate heat so that at least the temperature of the liquid cell is constantly maintained at a bias temperature within the range of 25° C. to 70° C. irrespective of whether the energy unit is driven, wherein, the energy unit includes at least one resistor as a heating element for ejecting the ejection medium, and the heating means includes at least one transistor as a heating element for maintaining the bias temperature.