| 摘要 |
The circuit for heating the thermal head with constant temperature comprises a rectifier (1) providing rectified voltage (Vd) to the thermal head (6), a clock generator (2) providing pulse having shorter period than secanning period, a controller (3) providing scanning data, shift clock pulse, and a control pulse by the clock pulse, a heating time adjuster (4) determining the heating time with the control pulse, and a driving controller (5) heating the thermal head for the time determined by the adjuster.
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