Inkjet printing apparatus and inkjet printing method

摘要

There is provided an inkjet printing apparatus which can output a stable image without density unevenness by performing appropriate drive control to print elements based upon an appropriate representative temperature of a chip whatever image data is printed on a print medium. For this purpose, detection temperatures of a plurality of temperature sensors are lined up in high temperature order, and coefficients by which the respective detection temperatures are multiplied, are determined to be associated with that order at the lining-up, determining a representative temperature by the weighted average method. The common drive pulse associated with to the individual chip based upon the representative temperature thus obtained, to be applied thereto. Thereby even if temperature variations of print elements on the chip exist, it is possible to appropriately control the entire chip in temperature.

主权项

1. An inkjet printing apparatus comprising:
a print head comprising a substrate provided with an element array, in which a plurality of print elements for ejecting ink by applying drive pulses thereto are arranged, and a plurality of temperature sensors for temperature measurement; an obtaining unit configured to find respective temperatures of the plurality of the temperature sensors to obtain a plurality of detection temperatures; a determining unit configured to line up the plurality of the detection temperatures in temperature order to determine coefficients by which the respective detection temperatures are multiplied, and which are associated with the temperature order at the lining-up; and a calculating unit configured to multiply each of the plurality of the detection temperatures by the corresponding coefficient determined by the determining unit for a weighted average to calculate a representative temperature.