Patent ID: 8746833
Filing Date: 2014-06-10
Classification: B41J,H05K

Abstract:
1. A liquid jet head comprising: a head chip including a plurality of channels arranged parallel to one another at preselected intervals and configured to be filled with a liquid, a plurality of drive electrodes formed on respective side walls of the plurality of channels, and a plurality of nozzle holes communicating with respective ones of the plurality of channels; a temperature sensor arranged in or in proximity to the head chip for detecting a temperature of the liquid filled in the plurality of channels of the head chip; a drive circuit board having a drive circuit configured to drive the head chip; drive voltage value setting means for determining a magnitude of a drive voltage based on a value of a temperature detected by the temperature sensor; a flexible printed board located between the head chip and the drive circuit board, the flexible printed board having signal lines formed thereon for electrically connecting the drive circuit to the drive electrodes of the head chip, and having connecting wiring formed thereon for electrically connecting the temperature sensor to the drive voltage value setting means; and control means for applying a drive voltage, the magnitude of which is determined by the drive voltage value setting means, from the drive circuit to the drive electrodes of the head chip via the signal lines of the flexible printed board so as to increase a pressure in each of the plurality of channels by deformation of the side walls to thereby discharge the liquid in the plurality of channels from the respective plurality of nozzle holes; wherein the temperature sensor is mounted on a land formed at a middle portion of the flexible printed board, the land extending from the middle portion of the flexible printed board to a connecting end portion thereof which connects the flexible printed board and the head chip at the head chip side of the flexible printed board.