Patent Number: 8,721,016

Title: Apparatus for and method of driving multi-nozzle piezo-inkjet head based on digital grayscale

Abstract: There is provided an apparatus for and method of driving a multi-nozzle piezo-inkjet head based on a digital grayscale, the apparatus including: a control unit providing a pulse data signal having at least one pulse waveform according to graphic image data, controlling a voltage variation according to a frequency response characteristic of the multi-nozzle piezo inkjet head, and controlling a voltage amplification, so as to eject droplets of ink at a previously set jetting frequency according to the graphic image data; a variable voltage supply unit generating a varied operating voltage by varying a level of a previously set direct current voltage; and an amplification circuit unit generating a voltage driving waveform including at least one pulse waveform having the level of the varied operating voltage, and supplying the voltage driving waveform to the multi-nozzle piezo inkjet head.

Inventors: Kim; Byung Hun (Gyunggi-do, KR), Lee; Hwa Sun (Gyunggi-do, KR)

Assignee: Samsung Electro-Mechanics Co., Ltd.

International Classification: B41J 29/38 (20060101)

Expiration Date: 5/13/12018