Patent ID: 6243114
Filing Date: 2001-06-05
Classification: B41J,H04R

Abstract:
An inkjet head comprising:a pressure chamber containing ink; a piezoelectric plate member which constitutes a portion of a wall of said pressure chamber and bulges to cause distortion and thereby change the effective volume of said pressure chamber when a voltage is applied to said piezoelectric plate member;a plurality of first sets of independently energized, mutually spaced electrodes disposed to traverse said piezoelectric plate member; anda second set of commonly energized, mutually spaced electrodes disposed to traverse said piezoelectric plate member; wherein the electrodes of said plurality of first sets and said second set being arranged on alternate disposition across said piezoelectric plate member to produce an electric field in said piezoelectric plate member orientated to have a resultant component extending in a direction along a plane of said piezoelectric plate member so that distortion in the direction along said plane of said piezoelectric plate member due to said resultant component of said electric field causes said piezoelectric plate member to bulge.