| 摘要 |
A thermal recording head driving control system for controlling the activation of heat-producing elements mounted on a substrate is provided. The driving control system includes a shift register having a number of bits corresponding to the heat-producing elements. The image data stored in the shift register is serially supplied to one input terminal of an AND gate which has its the other input terminal connected to receive a control pulse and its output terminal connected to supply an activation pulse to the thermal recording head. The activation pulse is formed from the image signal depending upon the condition of the control pulse which is determined by the temperature of the substrate on which the heat-producing elements are mounted and the activation history of each of the heat-producing elements. Specifically, the same image data is repetitively supplied to the shift register over a predetermined number of times at a speed much faster than the line scanning speed along the linear array of heat-producing elements, wherein the number of activation pulses produced is controlled by changing the binary state of the control pulse.
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