| 摘要 |
FIELD: printing.SUBSTANCE: substrate of the printing elements comprises a printing element, a switching element which actuates the printing element based on the input control signal, a first current source which generates the predetermined current. In addition the substrate comprises a second current source which generates the current based on the input voltage, and a current generating circuit which generates the control signal by amplifying the current obtained by adding the voltage generated by the second current source and the current generated by the first current source, and then generates the control signal by amplifying the current generated by the first current source.EFFECT: increased control speed with the feedback for voltage to be applied to the printing element with low power consumption.11 cl, 12 dwg |
