Patent ID: 8646863
Filing Date: 2014-02-11
Classification: B41J

Abstract:
1. An ink jet recording head, comprising: a nozzle array including nozzles arranged in longitudinal rows, the nozzles including discharge ports to discharge liquid when recording, pressure chambers configured to communicate with respective discharge ports, and liquid flow paths configured to supply liquid to the respective pressure chambers; discharge energy generation elements configured to apply, in response to receiving time-division driving based on a predetermined signal order, discharge energy to the pressure chambers to discharge liquid from the nozzles in a predetermined discharge order during time-division driving; and a time-division drive system configured to drive the discharge energy generation elements at different times, wherein adjacent liquid flows paths are separated from each other by a distance interval as measured in a straight line direction of a longitudinal row, and wherein arranging intervals of the liquid flow paths take at least two different values, and wherein, when a drive timing difference average X between the adjacent a discharge energy generation elements is calculated by the following expression: where N indicates, as a quantity, a number of divisions for the time-division driving, and where drive timings of adjacent N discharge energy generation elements are set to n where the distance interval D is a distance between a liquid flow path corresponding to a k-th discharge energy generation element where |n