| 摘要 |
PURPOSE:To enable prevention of generation of white streaks or density variation of vertical and horizontal lines by causing adjoining heat generating elements to generate heat with time delay. CONSTITUTION:CPU 4, RAM 5 and ROM 6 are connected to a host computer 7 via a signal line Sa. In addition, CPU 4 controls a 144-bit shift register 8, LATCH 9 and a driver 10 through a signal Sb, signals STB, LATCH, TX and CLK. To this driver 10, each heat generating element of a recording head 1 is connected. Each heat generating element and each phase of a pulse motor 12 are excited under the control of CPU 4. For drive of the recording head 1, heat generating elements of odd number are first used for printing a single line starting with a heat generating element at left end, and after termination of printing with these elements, those of even number are used for printing. For this reason, the adjoining heat generating elements do not generate heat simultaneously but with time delay. Subsequently, printing dots are not closed together by the heating of the adjoining heat generating elements, and recording is performed in superior quality print. |
