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公开(公告)号：EP0878765A3
公开(公告)日：2005-05-18
申请号：EP98108602.8
申请日：1998-05-12
CPC分类号： G06F15/7814
摘要： A circuit for selecting a base memory to be accessed by a microcontroller in response to a command from the microcontroller. An input receives the command from the microcontroller. The command selectively instructs the circuit to reset the microcontroller and signal the microcontroller to access an internal memory as the base memory. Also, the command selectively instructs the circuit to reset the microcontroller and signal the microcontroller to access an external memory as the base memory. A reset output is used to send the reset signal to the microcontroller, and a memory select output is used to send a memory select signal to the microcontroller. A logic circuit processes the command received from the microcontroller, and selectively sends an internal base memory select signal on the memory select output in response to the command received from the microcontroller, while the reset signal is being processed by the microcontroller, and selectively sends an external base memory select signal on the memory select output in response to the command received from the microcontroller while the reset signal is being processed by the microcontroller.
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公开(公告)号：EP0880274A3
公开(公告)日：1999-12-29
申请号：EP98302104.9
申请日：1998-03-20
IPC分类号： H04N1/40
CPC分类号： G06K15/1209 , B41J2/471 , G03G15/0435 , G03G2215/025 , G03G2215/0402 , H04N1/40037
摘要： The invention is directed to a method of calibrating a laser (12) in an electrophotographic image forming apparatus (10) used for producing a print image on a print medium. A laser (12) having a selectively energizable laser beam output is provided. A rotatable optical device (20) and the laser combine to define a movable projection path of the laser beam output. Rotation of the optical device (20) results in movement of the projection path across a scan line overlaying a photoconductive drum (38). The optical device (20) has a rotational acceleration upon initial rotation thereof with a ramp-up period during which the rotational velocity increases. A safe area (46) is established in a portion of the scan line (40,50) which does not overlay an image area (48) on the photoconductive drum (38). The laser (12) is energized and calibrated when the projection path is positioned in the safe area (46). The calibration is carried out during the ramp-up period of the rotating optical device (20).
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4.发明公开Method and apparatus for automatically determining the type of printhead installed in a laser printer 失效用于自动确定印刷头的类型的方法和设备，他D IN的激光打印机被安装
公开(公告)号：EP0877337A3
公开(公告)日：2000-12-06
申请号：EP98302156.9
申请日：1998-03-23
CPC分类号： B41J2/471 , B41J2202/17 , G06K15/1204
摘要： A laser printer (10) is provided having an automatic printhead identification system for use in a family of laser printers that are compatible with more than one model of printhead. For example, a single laser printer model can be made so that two different printheads can be successfully used, so long as the printer system knows which laser printhead has actually been installed. To detect which printhead has been installed, the printer operating system provides a reference clock signal (REF CLK) having a pre-determined frequency, which dictates the rotational speed of the motor (42). Once the motor (42) has achieved a "lock" operational speed, the printer (10) measures the scan rate of the faceted mirror by detecting the time interval between pulses of the "HSYNC" signal. The HSYNC signal is sent to a "divide-by-n counter" circuit (40) which divides the pulse frequency of the HSYNC signal, thereby increasing the time interval (by a factor of "n") that must be sensed by the system to determine which printhead is in fact installed. So long as the HSYNC "lock" frequency is different between the various models of printheads that are compatible with a particular model laser printer, the principles of the invention can be used without adding any extra hardware sensors, signals, or memory addresses and detecting codes.
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5.发明公开Image forming apparatus and method for laser calibration 失效Bilderzeugungsgerätund Verfahren zur Laserkalibrierung
公开(公告)号：EP0880274A2
公开(公告)日：1998-11-25
申请号：EP98302104.9
申请日：1998-03-20
IPC分类号： H04N1/40
CPC分类号： G06K15/1209 , B41J2/471 , G03G15/0435 , G03G2215/025 , G03G2215/0402 , H04N1/40037
摘要： The invention is directed to a method of calibrating a laser (12) in an electrophotographic image forming apparatus (10) used for producing a print image on a print medium. A laser (12) having a selectively energizable laser beam output is provided. A rotatable optical device (20) and the laser combine to define a movable projection path of the laser beam output. Rotation of the optical device (20) results in movement of the projection path across a scan line overlaying a photoconductive drum (38). The optical device (20) has a rotational acceleration upon initial rotation thereof with a ramp-up period during which the rotational velocity increases. A safe area (46) is established in a portion of the scan line (40,50) which does not overlay an image area (48) on the photoconductive drum (38). The laser (12) is energized and calibrated when the projection path is positioned in the safe area (46). The calibration is carried out during the ramp-up period of the rotating optical device (20).
摘要翻译： 本发明涉及一种用于在用于在打印介质上产生打印图像的电子照相图像形成装置（10）中校准激光器（12）的方法。 提供了具有选择性激励的激光束输出的激光器（12）。 可旋转光学装置（20）和激光器组合以限定激光束输出的可移动投影路径。 光学装置（20）的旋转导致投影路径跨越覆盖感光鼓（38）的扫描线的移动。 光学装置（20）在初始旋转时具有旋转加速度，其中旋转速度增加。 在扫描线（40,50）的不覆盖感光鼓（38）上的图像区域（48）的部分中建立安全区域（46）。 当投影路径位于安全区域（46）中时，激光器（12）被通电和校准。 校准在旋转光学装置（20）的斜坡上升期间进行。
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6.发明公开
公开(公告)号：EP0830951A3
公开(公告)日：1999-09-01
申请号：EP97307372.9
申请日：1997-09-22
IPC分类号： B41J13/00
CPC分类号： B41J13/26
摘要： A laser printer (3) can initiate a line of printing only when the sweep of the laser light reaches a point in its cycle. An inkjet printer (5) moves paper by stepper motor in increments. Switch (9) senses the paper (15) to determine the location of paper in the paper path with respect to nominal printing locations (Nl+1, Nl, Nl-1) of the laser printer. The closest nominal position (Nl-1) is selected for printing. The paper may lead or log (17) the selected position. Switch (11) senses the paper to determine the location of paper in the path with respect to nominal printing locations (Ni+1, Ni, Ni-1) of the inkjet printer. Two leads are added to reach a net greater lead, a log is subtracted from a lead, and two lags (17,19) are added to reach a net greater lag. The closest nominal position (Ni+1) is then selected. This assures that registration does not vary by more than one half of the spacing between nominal locations of the second printer.
摘要翻译： 激光打印机（3）只有当激光的扫描到达其循环中的一点时才能启动一行打印。 喷墨打印机（5）通过步进电机逐步移动纸张。 开关（9）感测纸张（15）以确定相对于激光打印机的标称打印位置的路径（6）中的纸张的位置。 选择最接近的标称位置进行打印。 纸张可能导致或滞后于所选位置。 开关（11）感测纸张以确定相对于喷墨打印机的标称打印位置的纸张在路径中的位置。 增加两个线索以达到净额更大的潜在客户，从潜在客户中减去一个滞后时间，并增加两个滞后时间以达到净滞后。 然后选择最接近的标称位置。 这确保了注册不会超过第二台打印机的标称位置间距的一半以上。
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7.发明公开Method and apparatus for automatically determining the type of printhead installed in a laser printer 失效用于自动确定印刷头的类型的方法和设备，他D IN的激光打印机被安装
公开(公告)号：EP0877337A2
公开(公告)日：1998-11-11
申请号：EP98302156.9
申请日：1998-03-23
CPC分类号： B41J2/471 , B41J2202/17 , G06K15/1204
摘要： A laser printer (10) is provided having an automatic printhead identification system for use in a family of laser printers that are compatible with more than one model of printhead. For example, a single laser printer model can be made so that two different printheads can be successfully used, so long as the printer system knows which laser printhead has actually been installed. To detect which printhead has been installed, the printer operating system provides a reference clock signal (REF CLK) having a pre-determined frequency, which dictates the rotational speed of the motor (42). Once the motor (42) has achieved a "lock" operational speed, the printer (10) measures the scan rate of the faceted mirror by detecting the time interval between pulses of the "HSYNC" signal. The HSYNC signal is sent to a "divide-by-n counter" circuit (40) which divides the pulse frequency of the HSYNC signal, thereby increasing the time interval (by a factor of "n") that must be sensed by the system to determine which printhead is in fact installed. So long as the HSYNC "lock" frequency is different between the various models of printheads that are compatible with a particular model laser printer, the principles of the invention can be used without adding any extra hardware sensors, signals, or memory addresses and detecting codes.
摘要翻译： 一种激光打印机（10）在自动打印头识别系统提供了一种具有在一个家庭中的激光打印机中的用途做了与打印头的多个模型兼容。 例如，一个单一的激光打印机新型能够制造这样做了两个不同的打印头可以被成功地使用，只要打印机系统知道哪个激光打印头已实际安装。 以检测打印头已经被安装时，打印机操作系统提供了一种具有预先确定的频率，其指示所述马达（42）的旋转速度的基准时钟信号（REF CLK）。 一旦电机（42）已经实现了“锁定”操作速度，打印机（10）通过检测该“HSYNC”信号的脉冲之间的时间间隔测量所述面镜的扫描速率。 HSYNC信号被发送到“除以N计数器”电路（40），其将HSYNC信号的脉冲频率，从而增加了时间间隔（由“n”个的因子）也必须由系统来感测 确定性矿山哪个打印头实际上是在安装。 只要该HSYNC“锁定”频率的打印头做了各种型号之间的不同与特定模型激光打印机兼容，可以在不增加任何额外的硬件传感器，信号，或存储器地址和检测码中使用的本发明的原理 ，
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公开(公告)号：EP0830951A2
公开(公告)日：1998-03-25
申请号：EP97307372.9
申请日：1997-09-22
IPC分类号： B41J13/00
CPC分类号： B41J13/26
摘要： A laser printer (3) can initiate a line of printing only when the sweep of the laser light reaches a point in its cycle. An inkjet printer (5) moves paper by stepper motor in increments. Switch (9) senses the paper (15) to determine the location of paper in the paper path with respect to nominal printing locations (Nl+1, Nl, Nl-1) of the laser printer. The closest nominal position (Nl-1) is selected for printing. The paper may lead or log (17) the selected position. Switch (11) senses the paper to determine the location of paper in the path with respect to nominal printing locations (Ni+1, Ni, Ni-1) of the inkjet printer. Two leads are added to reach a net greater lead, a log is subtracted from a lead, and two lags (17,19) are added to reach a net greater lag. The closest nominal position (Ni+1) is then selected. This assures that registration does not vary by more than one half of the spacing between nominal locations of the second printer.
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公开(公告)号：EP0880274B1
公开(公告)日：2004-05-26
申请号：EP98302104.9
申请日：1998-03-20
IPC分类号： H04N1/40
CPC分类号： G06K15/1209 , B41J2/471 , G03G15/0435 , G03G2215/025 , G03G2215/0402 , H04N1/40037
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