Patent ID: 8152277
Filing Date: 2012-04-10
Classification: B41J

Abstract:
1. An ink jet printing head mountable to an ink jet printing apparatus, comprising: a connection terminal group comprising a plurality of connection terminals for carrying out an electrical connection by contacting a plurality of connection terminals in the ink jet printing apparatus when the head is mounted on the ink jet printing apparatus; and a print element substrate having ink ejection openings and elements for generating energy to eject ink from the ink ejection openings in response to a drive signal transmitted from the ink jet printing apparatus via the connection terminals of the connection terminal group, wherein the connection terminal group is arranged in a planar area, wherein the connection terminals positioned in at least three corners of a terminal arranging area of the connection terminal group arranged in the planar area are used as detection terminals for detecting an electrical connection state between the ink jet head and the ink jet printing apparatus, and wherein the plurality of connection terminals include connection terminals which are not used for detecting the electrical connection state, and wherein at least one of the connection terminals positioned in the at least three corners is a connection terminal for the drive signal.