Electron-beam generating device having plurality of cold cathode elements, method of driving said device and image forming apparatus applying same
    1.
    发明授权
    Electron-beam generating device having plurality of cold cathode elements, method of driving said device and image forming apparatus applying same 失效
    具有多个冷阴极元件的电子束产生装置,驱动所述装置的方法和施加该装置的图像形成装置

    公开(公告)号:US06445367B1

    公开(公告)日:2002-09-03

    申请号:US08489391

    申请日:1995-06-12

    IPC分类号: G09G322

    摘要: A method and apparatus for driving an electron source in which a high-quality image display is presented by correcting a non-uniform effective current distribution caused in cold cathode elements by leakage current. A digital video signal enters a shift register where a serial-to-parallel conversion is made for each line of an image based upon a shift clock signal. One line of the image data that has been subjected to the serial-to-parallel conversion is latched in a latch circuit and then applied to a voltage modulating circuit. The latter voltage-modulates the input data and sends the modulated signal to a voltage/current converting circuit. The latter converts the voltage quantity to a current quantity, which is applied to each of the cold cathode elements of a display panel through respective column terminals. A voltage V1 is applied to the selected row wire, and a voltage V2 (V2≠V1) is applied to all other row wires, for controlling the leakage current.

    摘要翻译: 一种用于驱动电子源的方法和装置,其中通过利用泄漏电流校正由冷阴极元件引起的不均匀有效电流分布来呈现高品质图像显示。 数字视频信号进入移位寄存器,其中基于移位时钟信号对图像的每一行进行串行到并行转换。 已经经过串并转换的图像数据的一行被锁存在锁存电路中,然后被施加到电压调制电路。 后者对输入数据进行电压调制,并将调制信号发送到电压/电流转换电路。 后者将电压量转换成通过各个列端子施加到显示面板的每个冷阴极元件的电流量。 电压V1被施加到所选择的行线,并且电压V2(V2 <> V1)被施加到所有其它行导线,以控制漏电流。

    Electron generating device, image display apparatus, driving circuit therefor, and driving method
    2.
    发明授权
    Electron generating device, image display apparatus, driving circuit therefor, and driving method 失效
    电子发生装置,图像显示装置,其驱动电路及驱动方法

    公开(公告)号:US06169528A

    公开(公告)日:2001-01-02

    申请号:US08689656

    申请日:1996-08-13

    IPC分类号: G09G322

    摘要: In order to prevent voltage drops across the wiring resistances in a multi-electron source having a plurality of electron emitters wired in the form of a matrix through a plurality of data wiring layers and a plurality of scanning wiring layers, a constant current signal is output to each data wiring layer. At this time, each non-selected data wiring layer tends to be set at a high impedance and vary in potential, resulting in an abnormal turn-on operation or an electron orbit shift. A driving circuit for solving this problem is provided. A switch for switching a constant current output unit for outputting a constant current regardless of the impedance of a signal output destination, and a constant voltage output unit for outputting a constant voltage regardless of the impedance of a signal output destination is connected to each data wiring layer. For example, a constant-current circuit (17) as a current output unit always outputs the same current (I1 to In) to a switch (30). A pulse width signal (PW1 to PWn) from a pulse-width modulation circuit (7) serves to switch the mode of outputting a current (I1 to In) to a data wiring layer (Dy1 to Dyn) and the mode of fixing a data wiring layer to voltage GND.

    摘要翻译: 为了防止具有通过多个数据布线层和多​​个扫描布线层以矩阵形式布线的多个电子发射体的多电子源中的布线电阻之间的电压降,输出恒定电流信号 到每个数据布线层。 此时,每个未选择的数据布线层倾向于设置为高阻抗并且电位变化,导致异常接通操作或电子轨道偏移。 提供了解决这个问题的驱动电路。 用于切换用于输出恒定电流的恒定电流输出单元的开关,而不管信号输出目的地的阻抗如何,以及用于输出恒定电压而不管信号输出目的地的阻抗的恒定电压输出单元连接到每个数据布线 层。 例如,作为电流输出单元的恒流电路(17)总是向开关(30)输出相同的电流(I1〜In)。 来自脉冲宽度调制电路(7)的脉冲宽度信号(PW1〜PWn)用于将输出电流(I1〜In)的模式切换为数据布线层(Dy1〜Dyn)和固定数据的方式 接线层到电压GND。