PRINTING HEAD SUBSTRATE FOR JET PRINTING, METHOD OF EXCITATION CONTROL, JET PRINTING HEAD AND DEVICE FOR JET PRINTING Russian patent published in 2008 - IPC B41J2/05 

FIELD: printing.

SUBSTANCE: invention relates to a substrate for jet printing head, printing head and jet printing device. The said substrate with electrical heat converters intended for generation of heat required for releasing the ink incorporates a logic circuit to generate a unit selection signal to select the said converters in separate units proceeding from the voltage amplitude first level input signal and the element excitation signal for excitation of every electrical heat converter in the selected unit at the second voltage amplitude level exceeding the first one, and the excitation circuit intended for every electrical heat converter to excite the said converters in separate units proceeding from the unit selection and element selection signals of the second level of voltage amplitude, the said signals coming from the logic circuit. The method of controlling the excitation of electrical heat converters incorporates feeding the voltage amplitude first level input signal allowing for the input signal, the unit selection signal to select the unit of electrical heat converters in separate units and the element excitation signal to excite every electrical heat converter in the selected unit at the second level of the voltage amplitude exceeding that of the first one, and exciting the electrical heat converters in separate units allowing for the unit selection and element selection signals of the second voltage amplitude level coming from the logic circuit, the above functions are realised by exciting the excitation circuit designed for every electrical heat converter. The jet printing head contains outlets for ink and the substrate supporting the electrical heat converters arranged in compliance with outlets. The jet printing head cartridge carries a jet printing head and a cup filled with ink to be fed into the printing head. The jet printing device has outlets to let out the ink and a substrate whereon installed are electrical heat converters arranged in compliance with outlets. The circuit design is developed wherein the logic excitation voltage is converted into the voltage of elements excitation without increase in the length of segments in direction perpendicular to the direction of the matrix of segments. Annual output of finished products is increased and circuitry is simplified by reducing the circuit of pulse-amplitude modulation and the number of elements on the substrate.

EFFECT: increased annual output and simplified circuitry.

12 cl, 12 dwg