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    Method of driving an ink jet printer head and driving circuit
    1.
    发明公开
    Method of driving an ink jet printer head and driving circuit 失效
    Methode zum Antreiben eines Tintenstrahldruckkopfes und Ansteuerschaltung。

    公开(公告)号：EP0531173A1

    公开(公告)日：1993-03-10

    申请号：EP92308088.1

    申请日：1992-09-07

    申请人： BROTHER KOGYO KABUSHIKI KAISHA

    发明人： Zhang, Qiming, c/o Brother Kogyo K.K. ,  Yoshida, Hitoshi, c/o Brother Kogyo K.K.

    IPC分类号： B41J2/015

    CPC分类号： B41J2/04516 ,  B41J2/04541 ,  B41J2/04581 ,  B41J2/04588

    摘要： A method of driving an ink jet printer head is provided in which reverse flow of an ink is prevented so as not to introduce air into an ink chamber (4). Further, production of ink satellites are prevented. A braking voltage is instantaneously applied to a piezoelectric element (3) after a voltage to the piezoelectric element (3) has reached a peak level so that inertia of both the piezoelectric element (3) and the ink contained in the ink chamber (4) is canceled. As a result, the flow of ink in the nozzle (5) and ink ejection from the outlet of the nozzle (5) are abruptly stopped to thus prevent the generation of ink satellite. In order that the deformation of the piezoelectric element (3) may not be quickly restored, the voltage applied to the piezoelectric element (3) is gradually returned to a non-driving voltage level, whereby air is prevented from being introduced into the ink chamber (4).

    摘要翻译： 提供了一种驱动喷墨打印头的方法，其中防止墨的反向流动，以便不将空气引入墨室（4）。 此外，防止了墨水卫星的生产。 在压电元件（3）的电压达到峰值水平之后，制动电压立即施加到压电元件（3），使得压电元件（3）和墨水室（4）中容纳的墨水的惯性， 被取消。 结果，喷嘴（5）中的墨水流动和喷嘴（5）的出口的喷墨突然停止，从而防止墨水卫星的产生。 为了使压电元件（3）的变形不能快速恢复，施加到压电元件（3）的电压逐渐恢复到非驱动电压水平，从而防止空气被引入墨室 （4）。

    Apparatus for converting image outline data into dot data representative of image dots
    3.
    发明公开
    Apparatus for converting image outline data into dot data representative of image dots 失效
    Bordpunkte darstellende Punktdaten的Anordnung zur Umsetzung von Bildumrissdaten。

    公开(公告)号：EP0389131A1

    公开(公告)日：1990-09-26

    申请号：EP90302262.2

    申请日：1990-03-02

    申请人： BROTHER KOGYO KABUSHIKI KAISHA

    发明人： Yoshida, Hitoshi, c/o Brother Kogyo K.K. ,  Kanegae, Takahiro, c/o Brother Kogyo K.K. ,  Kawamoto, Naoyuki, c/o Brother Kogyo K.K.

    IPC分类号： G09G1/14

    CPC分类号： G09G1/14 ,  G06K15/00 ,  G06K2215/0045 ,  G06T9/20

    摘要： A data converting apparatus for converting outline data representative of an outline of a character, into dot data including dot-forming bits each indicative of the presence of an image dot to be formed at a position of a corresponding dot-forming picture element which lies within the outline of each stroke of the character, so as to satisfy a predetermined requirement, when the outline of the character is superimposed on a pixel screen wherein picture elements are defined by x-axis pixel lines and y-axis pixel lines perpendicular to the x-axis pixel lines. The apparatus includes a device for determining whether or not a difference between an outline width of each character stroke as defined by the outline data and a reproduction width of the as reproduced according to the dot data as normally prepared based on the outline data exceeds a reference value. The normally prepared dot data are changed so as to reduce the difference between the outline and reproduction widths, if the difference exceeds the reference value.

    摘要翻译： 一种数据转换装置，用于将表示字符的轮廓的轮廓数据转换为点数据，其包括点形成位，每个点形成位指示要形成在相应的点形成图像元素的位置处的图像点， 字符的每个笔画的轮廓，以满足预定要求，当字符的轮廓叠加在像素屏幕上，其中像素由x轴像素线和垂直于x的像素线x定义 -axis像素线。 该装置包括用于确定由轮廓数据定义的每个字符笔划的轮廓宽度与根据通常根据轮廓数据准备的点数据再现的再现宽度之间的差是否超过参考的装置 值。 通常准备的点数据被改变，以便如果差超过参考值，则减小轮廓宽度和再现宽度之间的差。