| 摘要 |
The invention relates to a drive circuit for a thermal printer with a thermal print head (1) with a series of electrically drivable heating elements (14), with a microprocessor (2) which transmits data to be printed to a register (13) which is assigned to the thermal print head (1). In order to increase the printing speed, a buffer (15) which is connected to the microprocessor (2) by means of a parallel data line and a separate charge state monitoring circuit (17) are proposed, which charge state monitoring circuit (17) is connected to the buffer (15) and permits data to be transmitted from the buffer (15) into the register (13) when a defined quantity of data has been written into the buffer (15) by the microprocessor (2). Alternatively, or additionally, it is recommended that a pulse generator (9) and a stepping motor driver (10) be connected between the output of the microprocessor (2) and the stepping motor (11) in order to drive the counterpressure roller (12). <IMAGE> |
