Optical writing head driving device and method of driving optical writing head
    2.
    发明授权
    Optical writing head driving device and method of driving optical writing head 有权
    光写头驱动装置及驱动光写头的方法

    公开(公告)号:US06268878B1

    公开(公告)日:2001-07-31

    申请号:US09184831

    申请日:1998-11-02

    IPC分类号: B41J2435

    CPC分类号: G06K15/1247

    摘要: A head controller 2 reads out adjustment data from a ROM 3 immediately after a power-on operation. The adjustment data is prepared for adjusting unevenness of light emission from LEDs in a LED head 5. A buffer memory 4 stores the read adjustment data. The head controller 2 reads the adjustment data from the buffer memory 4 with high data transfer rate, and obtains bitmap data from a frame memory or the like (not shown). The head controller 2 sends the read bitmap data and the adjustment data to an anode driver 51. The head controller 2 sends a strobe signal to the anode driver 51 and a cathode driver 53. The anode driver 51 adjusts ampere of supplied currents (i.e. drive signals corresponding to the bitmap data) from the head controller 2, in accordance with the received adjustment data in response to the reception of the strobe signal. The adjusted drive signals are sent to LED array chips 52. At the same time, the cathode driver 53 selects one of the LED array chips 52 in accordance with the received strobe signal so that the LEDs emit even lights. The optical writing head driving device 1 performs the above operations repeatedly to sequentially emit lights from the LEDs chip by chip under time sharing control for 1 line writing. As a result, the bitmap data is written onto a photosensitive member evenly at a high speed.

    摘要翻译: 磁头控制器2在上电操作之后立即从ROM 3中读出调整数据。 准备调整数据以调整LED头5中的LED的发光不均匀性。缓冲存储器4存储读取的调整数据。 头控制器2以高数据传输速率从缓冲存储器4读取调整数据,并从帧存储器等(未示出)获得位图数据。 磁头控制器2将读位图数据和调整数据发送到阳极驱动器51.磁头控制器2向阳极驱动器51和阴极驱动器53发送选通信号。阳极驱动器51调节供电电流的安培(即驱动 响应于接收到选通信号,根据所接收的调整数据,从头控制器2输出与位图数据对应的信号。 经调整的驱动信号被发送到LED阵列芯片52.同时,阴极驱动器53根据所接收的选通信号选择一个LED阵列芯片52,使得LED均匀发光。 光写入头驱动装置1在1线写入的时间共享控制下,重复执行上述操作以顺序地从LED逐芯地发光。 结果,位图数据被高速均匀地写入到感光部件上。

    Intermediate coupling unit between two image forming apparatuses and image forming apparatus adaptable thereto
    3.
    发明授权
    Intermediate coupling unit between two image forming apparatuses and image forming apparatus adaptable thereto 有权
    两个图像形成装置之间的中间耦合单元和适于其的图像形成装置

    公开(公告)号:US07957667B2

    公开(公告)日:2011-06-07

    申请号:US12490704

    申请日:2009-06-24

    IPC分类号: G03G15/00

    摘要: Provided are intermediate coupling unit that can maintain universal applicability of image forming apparatus so it can singly form images/be installed in small offices, but can also couple two apparatuses if necessary, and image forming apparatus adaptable to this unit. Intermediate coupling unit includes carry-in port at lower surface right side, plural conveying roller pairs sandwiching and conveying internally-carried-in recording medium, discharge ports formed near upper surface right/left ends for externally discharging recording medium, first/second flaps switching among conveying paths, A, B, C, paper discharge tray fixed at upper internal position, and internal paper feed cassette detachable downward. Two identical-shape printers are linked through conveying path A and enable double-speed-printing when coupled to top/bottom of intermediate coupling unit to face same direction, and linked through conveying path B and enable fast-double-side-printing when coupled to face opposite directions.

    摘要翻译: 提供了可以保持图像形成装置的通用适用性的中间耦合单元,从而可以单独地形成图像/安装在小型办公室中,但是如果需要也可以耦合两个装置,以及适用于该单元的图像形成装置。 中间联接单元包括下表面右侧的进入口,多个输送辊对,夹持和输送内部携带的记录介质,形成在上表面右/左端附近形成的用于外部排出记录介质的排出口,第一/第二襟翼切换 在输送路径中,A,B,C,固定在上部内部位置的排纸盘,以及可向下分离的内部供纸盒。 两个相同形状的打印机通过传送路径A连接,并且当耦合到中间耦合单元的顶部/底部以面向相同方向时实现双速打印,并且通过传送路径B链接并且当耦合时实现快速双面打印 面对相反的方向。

    Recording apparatus for carrying out high-density dot printing
    4.
    发明授权
    Recording apparatus for carrying out high-density dot printing 失效
    用于进行高密度点印的记录装置

    公开(公告)号:US5583558A

    公开(公告)日:1996-12-10

    申请号:US225443

    申请日:1994-04-08

    申请人: Toshiaki Yajima

    发明人: Toshiaki Yajima

    摘要: A recording apparatus has an array of recording elements arranged in a main scanning direction and having a predetermined dot pattern, and forms a dot image on a recording medium located opposite to the recording elements. Reception circuit receives image data of a predetermined dot density. A plurality of line buffers store one dot line of data of interest as a printing target among the image data and aligned in the main scanning direction, and plural dot lines of data preceding and following the one dot line with respect to a sub-scanning direction. A compensation data generating circuit converts the one dot line of data of interest as the printing target into N lines of compensation data, divided by N with respect to the sub-scanning direction, based on the plural dot lines of data preceding and following the one dot line. A control circuit controls the time for activating the recording elements based on the compensation data. Recording will therefore be accomplished with a dot recording density in the sub-scanning direction different from the dot density of the image data.

    摘要翻译: 记录装置具有沿主扫描方向布置并具有预定点阵图形的记录元件阵列,并且在与记录元件相对的记录介质上形成点图像。 接收电路接收预定点密度的图像数据。 多个行缓冲器存储图像数据中的一个感兴趣的数据点作为打印对象,并且在主扫描方向上相对于副扫描方向和一个点划线之前和之后的数据点 。 补偿数据生成电路基于在前后的数据的多个点划线将作为打印目标的感兴趣的数据的一个点线转换成相对于副扫描方向除以N的N行补偿数据 点线。 控制电路根据补偿数据控制激活记录元件的时间。 因此,以与图像数据的点密度不同的副扫描方向的点记录密度来实现记录。