JPS56148564A - Recording head driving system - Google Patents

Abstract

PURPOSE:To raise the quality of printing by regulating the time of application of voltage to the same control electrodes in a recording head-driving system in which voltage is selectively applied to plural recording and control electrodes. CONSTITUTION:Recording electrodes Mj (j is 1-2n) divided into blocks Bi (i is 1-n) are further divided into group MA and group MB by each block Bi. They are faced recording electrodes Sk [k is 1-(2n+1)], shown by Fig. A. Voltage is applied between the group MA and control electrodes (S1+S2) to record the left half of B1, voltage is applied between the group MB and control electrodes (S2+S3) to record the right half of B1, and these operations are biasedly conducted toward the right direction to perform the printing of all sections. Thus, since voltage is applied twice continuously to each of the control electrodes Sk, as shown by Fig. B, but voltages generated in the low-resistance layer of recording body are smaller on the second application, shown by Fig. C, to counter the problem, the time of the first application of voltage to Sk is made shorter than that of the second application, as shown by Fig. D, so as to equalize voltages generated in the low-resistance layer for both cases, as shown by Fig. E.