Liquid-ejection apparatus

A liquid-ejection apparatus comprising:

• a liquid chamber for accommodating liquid to be ejected;
• a heating element arranged within the liquid chamber;
• and
• a nozzle for ejecting liquid from the liquid chamber,
• wherein energy is applied to the heating element for heating it so as to apply an ejection force to the liquid in the liquid chamber so as to eject a liquid droplet from the nozzle,
• wherein the heating element is comprised of two juxtaposed bubble-generating regions with substantially the same surface-shape and substantially the same heating characteristics, and
• wherein the ejection direction of the liquid droplet is controlled by applying differing energy densities to the two respective bubble-generating regions, and
• wherein the relationship between a distance B between the centers of the two bubble-generating regions in the arranging direction of the two bubble-generating regions and an opening diameter Dx of the ejection face of the nozzle in the arranging direction of the two bubble-generating regions is:
• Dx >B, and further
• wherein the relationship between a thickness N of the nozzle-forming member and the distance B between the centers is:
• N<2×B.