| 摘要 |
PURPOSE:To lower the resistance between recording electrodes and alleviate the load on a driving circuit, by applying a voltage to between a central electrode and each of end electrodes in an arbitrary group of three adjacent recording electrodes. CONSTITUTION:When printing in a printing picture element area pn, switches sn-1, sn, sn+1 are closed, whereby electric currents are caused to flow in the directions of arrows 2, 3, and virtual resistors rn-1, rn generate heat to melt a fusible ink, thereby printing. When input signals Dn-5-Dn+5 to driving circuits bn-5-bn+5 are true (T), the driving circuits become active, and apply a voltage to the recording electrodes. When the input signal are false (F), the driving circuits have high impedances. Driving circuits...bn-2, bn, bn+2... with a low-voltage output and driving circuits...bn-1, bn+1, bn+3... with a high-voltage output are alternately connected to the recording electrodes. Printing picture elements in a line are divided into four groups each of which comprises every fourth one of the elements, and the four groups of the picture elements are allocated to each of time-sharing periods. When the interval of printing corresponds to four picture elements, the recording electrodes en+1 and en+3 have the same potential when a voltage is applied to the recording electrodes, so that crosstalk will not occur. |
