Patent ID: 6338537
Filing Date: 2002-01-15
Classification: B41J

Abstract:
An inkjet printer comprising:a head which includes a plurality of piezoelectric elements and jets ink using said piezoelectric elements; a carriage which has said head and moves with said head; and a one-chip head drive circuit, provided in said carriage, which receives a control signal and a drive signal for driving said piezoelectric elements, and drives said head, wherein said head drive circuit includes: a plurality of selection parts, connected to each of said piezoelectric elements, which may receive said drive signal; a control part, coupled to said selection parts, which controls said selection parts based on said control signal, and selects a piezoelectric element to be driven from among said piezoelectric elements; and a plurality of current amplifier parts, provided in every selection part and piezoelectric element, which amplify said drive signal to be supplied to said piezoelectric element to be driven, and the number of said current amplifier parts being identical to the number of said piezoelectric elements.