| 摘要 |
<p>PURPOSE:To prevent a heat generating resistor from being broken, by providing each latch circuit with a reset terminal so that it is reset by an input of a reset signal, and providing a timer circuit which outputs the reset signal after a predetermined lapse of time from the moment the last gate signal in a predetermined period is inputted and which is initialized when the first gate signal in the predetermined period is inputted. CONSTITUTION:The last gate signal Sm in a predetermined period is inputted to an input terminal for a start signal ST of a timer circuit 2, While the first gate signal S1 in the predetermined period is inputted to an input terminal for a stop signal SP of the timer circuit 2. An output signal from the timer circuit 2, namely, a reset signal RS is inputted to a reset terminal of each of latch circuits L1-Ln. When the last gate signal Sm in the predetermined period is inputted, the timer circuit 2 starts counting, and after a predetermined lapse of time from the completion of printing, the reset signal RS is outputted, thereby resetting the latch circuits L1-Ln. The counting operation of the timer circuit 2 is initialized by the first gate signal S1 corresponding to the start of printing in the next line.</p> |
