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    • 1. 发明授权
    • Thermal printing method
    • 热敏打印方式
    • US4887092A
    • 1989-12-12
    • US280816
    • 1988-12-07
    • Wolfgang PekruhnRalf KaiserHartmut Kirchhoff
    • Wolfgang PekruhnRalf KaiserHartmut Kirchhoff
    • B41J2/365
    • B41J2/365
    • In a prior art thermal printing method, the heating elements of a thermal printing head are driven in such fashion that the temperature of each and every individual heating element is first measured individually and successively before this heating element is charged with a current pulse whose intensity of current is dimensioned dependent on the measured temperature. In order to increase the printing speed, the temperatures of all heating elements (R1 . . . Rn) are first successively measured in the novel method fo the present invention in every drive cycle and are extrapolated to isochronic cooling temperature values dependent on the cooling characteristic of the heating elements (R1 . . . Rn). The heating elements (R1 . . . Rn) are then charged with current pulses whose pulse durations are individually dimensioned for every heating element (R1 . . . Rn) dependent on the cooling temperature value calculated for this heating element (R1 . . . Rn).
    • 在现有技术的热敏打印方法中,热敏打印头的加热元件以这样的方式驱动,使得每个单独的加热元件的温度首先在该加热元件被充满电流脉冲之前单独并连续地测量, 电流的尺寸取决于测量的温度。 为了提高印刷速度,首先在每个驱动周期中以本发明的新方法连续地测量所有加热元件(R1 ... Rn)的温度,并且根据冷却特性外推到等温冷却温度值 的加热元件(R1 ... Rn)。 然后,加热元件(R1 ... Rn)用电流脉冲充电,其脉冲持续时间根据为该加热元件计算的冷却温度值(R1 ... Rn)对于每个加热元件(R1 ... Rn) )。