Round line forming device and method

The invention provides a round line forming device and method. The device comprises a support table used for containing a base plate, a spraying nozzle unit located on the upper side of the base plate, discharging printing ink to the base plate and accordingly forming a graphic line, and a deviation unit generating regulated waveform deviation signals formed by repeating high level and low level signals with regulated time and interval and applying the signals to the spraying nozzle unit. According to the deviation signals, an electric field can be formed between the base plate and the spraying nozzle unit without applying ground potential to the base plate, and the discharge amount and the discharge time of the printing ink discharged from the spraying nozzle unit are adjusted according to the waveform of the deviation signals and the potential difference and period of the high level and the low level. 本发明提供种图形线形成装置及方法，所述装置包括：架台，用于安放基板；喷嘴单元，位于所述基板的上侧，向所述基板上排出油墨，从而形成图形线；偏差单元，生成高电平和低电平的信号以规定的时间和间隔所重复的规定波形的偏差信号