Patent ID: 8721046

Claim:
An ink jet printing head, comprising: a head portion including nozzles, pressure chambers which store ink and communicate with the nozzles, and driving elements which pressurize the ink in the pressure chambers to discharge ink drops from the nozzles; an ink tank disposed over the head portion to accommodate ink which is supplied to the pressure chambers of the head portion; a first rigid circuit board including an image-data control unit to output an image-data signal; a second rigid circuit board including a driving element driver unit to output a driving waveform signal to the driving elements of the head portion in accordance with the image-data signal output from the first rigid circuit board; a flexible printed circuit board arranged to electrically interconnect the first rigid circuit board and the second rigid circuit board; and a connector attached to an end portion of the first rigid circuit board opposite to the flexible printed circuit board and connected to the image-data control unit so that the image-data control unit is connectable to a host board through the connector, wherein the connector is disposed on a top surface of the ink tank, the first rigid circuit board is disposed on a side of the ink tank, the second rigid circuit board is disposed between the ink tank and the head portion, and the flexible printed circuit board is disposed in a bent condition between the first rigid circuit board and the second rigid circuit board.