| 摘要 |
A thermal printing method using a printing head (6, 20) with a plurality of resistive points (Pi) activated by the pulses of a supply voltage (Va) that fluctuates ( DELTA V) depending on the number (N) of simultaneously activated resistive points (Pi). The activation of the resistive points (Pi) is controlled by a control signal (STRB) with a duration determined so that the energy (e) delivered to the resistive points (Pi) by each pulse is unaffected by the fluctuations ( DELTA V) of the supply voltage (Va). The control signal (STRB) includes a first pulse (STRA) with a fixed, predetermined duration (To), followed by a second pulse (STRA+) with a variable duration (t), the duration (t) of the second pulse (STRA+) being determined during the duration (To) of the first pulse (STRA) depending on the actual value (V) of the supply voltage (Va). |
