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    • 5. 发明授权
    • Electronic apparatus and method of controlling electric motor mounted in electronic apparatus
    • 安装在电子设备中的电动机控制电子装置及方法
    • US07764037B2
    • 2010-07-27
    • US12039273
    • 2008-02-28
    • Yasutaka ShibagakiTomoyoshi KakegawaToshihiko Katayama
    • Yasutaka ShibagakiTomoyoshi KakegawaToshihiko Katayama
    • G05D23/00
    • H02P29/66
    • An electronic apparatus includes: a timer member that clocks time on the basis of the power supplied from a power source. A power supply member supplies the power to an electric motor of the electronic apparatus and to the timer member from the power source and interrupts the power supply thereto. A heat storage calculating member calculates heat storage of the electric motor and calculates heat storage of the electric motor after stop of the drive on the basis of the time clocked by the timer member. A controller controls the electric motor and controls the power supply member by initiating power-on and power-off operations. This is performed so as to, maintain the power supply to the timer member and the heat storage calculating member during a predetermined time, even after the power-off operation of the operation member.
    • 电子设备包括:定时器构件,其基于从电源提供的电力来计时。 供电部件从电源向电子设备的电动机和定时器部件供电,并中断其供电。 热存储计算部件基于由定时器部件计时的时间计算电动机的蓄热并计算停止驱动后的电动机的蓄热。 控制器控制电动机并通过启动上电和断电操作来控制供电元件。 这样,即使在操作部件的断电操作之后,也能够在规定时间内保持向定时器部件和蓄热计算部件的供电。
    • 6. 发明授权
    • Driving waveform generator and method of generating driving waveform
    • 驱动波形发生器和产生驱动波形的方法
    • US06890046B1
    • 2005-05-10
    • US09661265
    • 2000-09-13
    • Takakazu FukanoNoboru TamuraNoboru AsauchiMasahiko YoshidaYuichi NishiharaToshihiko Katayama
    • Takakazu FukanoNoboru TamuraNoboru AsauchiMasahiko YoshidaYuichi NishiharaToshihiko Katayama
    • B41J2/045H03K4/02B41J29/38H03B21/00
    • B41J2/04508B41J2/04541B41J2/04573B41J2/04581B41J2/04588H03K4/026
    • The present invention provides a technique that prevents a shift of a driving waveform due to accumulation of errors in a process of generating the driving waveform to drive driving elements on a print head. The technique of the present invention successively sums up a plurality of gradient data at a preset calculation period to give a result of summation and carries out digital-to-analog (D-A) conversion with regard to only specific upper columns in the result of summation in synchronism with the preset calculation period, so as to generate a driving waveform. Each gradient data represents a local gradient of the driving waveform and is stored in a memory. In the process of generating the driving waveform, the technique of the present invention corrects the result of summation to a preset value under a predetermined condition. One preferable embodiment clears specific lower bits in the result of summation in synchronism with a floor signal. Another preferable embodiment forcibly corrects the result of summation to an upper limit value or a lower limit value of a preset range when the result of summation exceeds the preset range. Such correction effectively cancels the potential effects of cumulative error on the driving waveform.
    • 本发明提供了一种技术,其防止在产生驱动波形的过程中由误差积累引起的驱动波形的偏移以驱动打印头上的驱动元件。 本发明的技术在预设的计算周期连续地总结多个梯度数据,以给出求和的结果,并且仅在相加结果中的特定上列进行数 - 模(DA)转换 与预设的计算周期同步,以产生驱动波形。 每个梯度数据表示驱动波形的局部梯度并存储在存储器中。 在产生驱动波形的过程中,本发明的技术在预定条件下将求和的结果校正为预设值。 一个优选实施例与地板信号同步地清除求和结果中的特定低位。 另一个优选实施例在求和结果超过预设范围时强制将求和结果校正为预设范围的上限值或下限值。 这种校正有效地消除了累积误差对驱动波形的潜在影响。