Patent ID: 8864265
Filing Date: 2014-10-21
Classification: B41J

Abstract:
1. A liquid ejection apparatus comprising a liquid ejection head including: a controller configured to control the energy-applying portion, wherein the controller controls the energy-applying portion in such a manner as to meet the following inequations: 0.85Ta≦T≦0.9Ta or 1.2Ta≦T in a case of p/D≦1.2, and 0.85Ta≦T in a case of p/D>1.2, where p is a distance between respective centers of the two ejection openings of the ejection opening group, the two ejection openings being formed on an ejection surface of the nozzle plate, D is a diameter of an opening of each of the nozzle holes corresponding to the two ejection openings of the ejection opening group, the opening being formed on a surface opposite to the ejection surface of the nozzle plate, Ta is a resonance period of the individual channel, and T is an ejection period of ink droplets while one pixel is formed.