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1.发明授权Method and apparatus for compensating for a darkness shift during the life of an electrophotographic printer cartridge 有权用于在电子照相打印机墨盒的寿命期间补偿黑暗偏移的方法和装置公开(公告)号：US06175375B1
公开(公告)日：2001-01-16
申请号：US09491323
申请日：2000-01-25
申请人： Douglas Anthony Able , Cyrus Bradford Clarke , Mark Edwin Kirtley Lund , Daniel George Mlejnek , George Peter Olson , Gregory Lawrence Ream , Thomas Campbell Wade
发明人： Douglas Anthony Able , Cyrus Bradford Clarke , Mark Edwin Kirtley Lund , Daniel George Mlejnek , George Peter Olson , Gregory Lawrence Ream , Thomas Campbell Wade
IPC分类号： G03G1500
CPC分类号： G03G21/1889 , G03G15/50 , G03G2221/1823 , G03G2221/183 , H04N1/40006 , H04N1/407
摘要： An improved EP printer will automatically compensate for printer output darkness shift over the usage life of one or more components of the print engine. In many EP print engines, the printer output darkness without correction will gradually change as the components are used, and typically, the darkness will increase to an extent that is perceptible. The printer output darkness can be controlled using a EP operating point that changes certain operating parameters, such as the laser diode current, the duty cycle of the video data signals driving the laser diode, and other voltage parameters including the charge roller voltage, or the developer bias voltage. It is desirable to make adjustments over the usage life of these components, so as to maintain the initial printer output darkness throughout the life of the major system components. The adjustments can occur at periodic intervals based upon a metric that includes one or more of the following parameters: number of pels produced, number of pages printed, number of cycles of one or more components of the print engine, and/or the consumption of toner in grams. The adjustment information can be provided as look-up tables, or in the form of transfer functions. If look-up tables are used, the adjustment control algorithm could be one that interpolates between periodically-adjusted usage values stored in the look-up tables. Since many EP process cartridges tend to print darker rather than lighter over the life usage of that process cartridge, the present invention will accomplish two important goals by utilizing the methodology described above; not only will the printer output darkness be maintained at a substantially constant value, but the actual number of pels printed and pages printed will be increased by use of the same quantity of toner stored within the replaceable process cartridge.
摘要翻译： 改进的EP打印机将自动补偿在打印引擎的一个或多个部件的使用寿命内的打印机输出暗度偏移。 在许多EP打印引擎中，打印机输出黑暗而不进行校正将随着使用组件而逐渐改变，并且通常黑暗将增加到可察觉的程度。 可以使用EP工作点来控制打印机输出暗度，该EP工作点改变某些操作参数，例如激光二极管电流，驱动激光二极管的视频数据信号的占空比，以及包括充电辊电压的其它电压参数，或 显影剂偏压。 期望调整这些部件的使用寿命，以便在主要系统部件的整个使用寿命期间保持初始打印机输出暗度。 调整可以基于包括以下参数中的一个或多个的度量的周期性间隔发生：所生成的像素数，打印页数，打印引擎的一个或多个组件的循环次数和/或消耗 墨粉以克计。 调整信息可以作为查询表提供，也可以以传递函数的形式提供。 如果使用查找表，则调整控制算法可以是在存储在查找表中的周期性调整的使用值之间进行内插的算法。 由于许多EP处理盒倾向于在该处理盒的使用寿命期内打印更暗而不是较轻，所以本发明将通过利用上述方法实现两个重要目标; 不仅打印机的输出暗度维持在基本恒定的值，而且通过使用存储在可更换的处理盒中的相同数量的调色剂，可以增加印刷的页数和打印页数的实际数量。
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公开(公告)号：US06606330B2
公开(公告)日：2003-08-12
申请号：US09850491
申请日：2001-05-07
IPC分类号： H01S313
CPC分类号： H04N1/4005 , B41J2/442 , H01S5/0617 , H01S5/0683 , H04N1/40037
摘要： Laser printers are designed assuming the actual laser operates at nominal values which are the average or central values of a large batch of such lasers. The nominal values are determined and stored in permanent memory. Similarly, the values of the laser actually in the printer are determined during manufacture and also stored in permanent memory. Data to the laser is adjusted to correlate the output called for by the data with the differences in response of the laser of the printer by determining the optical output called for by the data using the nominal values stored and then finding the power needed to achieve the same output using the actual values stored. This is particularly useful with extreme duty cycles.
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公开(公告)号：US08022976B2
公开(公告)日：2011-09-20
申请号：US11422605
申请日：2006-06-07
摘要： An apparatus for switching and controlling the intensity of a laser beam directed toward a beam detect sensor for an image forming device. A printing power reference signal and a beam detect power reference signal is selectively connected to a laser driver through a first switch. A printing power reference holding capacitor and a beam detect power reference holding capacitor is selectively connected to the laser driver through a second switch that is controlled in tandem with the first switch. During each scan cycle, the output laser power is monitored and used to adjust one of the two holding capacitors based such that both the printing power and the beam detect power have a controlled reference.
摘要翻译： 一种用于切换和控制朝向图像形成装置的光束检测传感器的激光束的强度的装置。 打印功率参考信号和光束检测功率参考信号通过第一开关选择性地连接到激光驱动器。 打印功率参考保持电容器和光束检测功率参考保持电容器通过与第一开关串联控制的第二开关选择性地连接到激光驱动器。 在每个扫描周期期间，输出激光功率被监测并用于调整两个保持电容器中的一个，使得打印功率和光束检测功率都具有受控参考。
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4.发明授权Method and apparatus for determining a process position of a scan line in an electrophotographic machine 有权用于确定电子照相机中扫描线的处理位置的方法和装置公开(公告)号：US06480221B1
公开(公告)日：2002-11-12
申请号：US09567992
申请日：2000-05-10
IPC分类号： B41J2435
CPC分类号： G06K15/1219 , B41J2/442 , H04N1/047 , H04N2201/0471 , H04N2201/04712 , H04N2201/04729 , H04N2201/04731 , H04N2201/04732 , H04N2201/04734 , H04N2201/04744 , H04N2201/04749
摘要： A method of determining a position of a laser beam in an electrophotographic machine includes providing a sensor device having a laser beam receiving surface with a first edge and a second edge. The second edge is nonparallel to the first edge. The laser beam is scanned across the receiving surface in a scan direction perpendicular to a process direction. The laser beam intersects each of the first edge and the second edge of the receiving surface during the scanning. A time period between when the laser beam intersects the first edge and when the laser beam intersects the second edge of the receiving surface is measured. A process position of the laser beam along the process direction is calculated based upon the measured time period.
摘要翻译： 确定电子照相机中的激光束的位置的方法包括提供具有带有第一边缘和第二边缘的激光束接收表面的传感器装置。 第二边缘与第一边缘不平行。 激光束沿垂直于过程方向的扫描方向扫描接收表面。 激光束在扫描期间与接收表面的第一边缘和第二边缘中的每一个相交。 测量当激光束与第一边缘相交并且当激光束与接收表面的第二边缘相交时的时间段。 基于测量的时间周期计算激光束沿着处理方向的处理位置。
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公开(公告)号：US20110317725A1
公开(公告)日：2011-12-29
申请号：US13222965
申请日：2011-08-31
IPC分类号： H01S3/10
摘要： An apparatus for switching and controlling the intensity of a laser beam directed toward a beam detect sensor for an image forming device. A printing power reference signal and a beam detect power reference signal is selectively connected to a laser driver through a first switch. A printing power reference holding capacitor and a beam detect power reference holding capacitor is selectively connected to the laser driver through a second switch that is controlled in tandem with the first switch. During each scan cycle, the output laser power is monitored and used to adjust one of the two holding capacitors based such that both the printing power and the beam detect power have a controlled reference.
摘要翻译： 一种用于切换和控制朝向图像形成装置的光束检测传感器的激光束的强度的装置。 打印功率参考信号和光束检测功率参考信号通过第一开关选择性地连接到激光驱动器。 打印功率参考保持电容器和光束检测功率参考保持电容器通过与第一开关串联控制的第二开关选择性地连接到激光驱动器。 在每个扫描周期期间，输出激光功率被监测并用于调整两个保持电容器中的一个，使得打印功率和光束检测功率都具有受控参考。
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公开(公告)号：US20070285492A1
公开(公告)日：2007-12-13
申请号：US11422605
申请日：2006-06-07
IPC分类号： B41J2/435
摘要： An apparatus for switching and controlling the intensity of a laser beam directed toward a beam detect sensor for an image forming device. A printing power reference signal and a beam detect power reference signal is selectively connected to a laser driver through a first switch. A printing power reference holding capacitor and a beam detect power reference holding capacitor is selectively connected to the laser driver through a second switch that is controlled in tandem with the first switch. During each scan cycle, the output laser power is monitored and used to adjust one of the two holding capacitors based such that both the printing power and the beam detect power have a controlled reference.
摘要翻译： 一种用于切换和控制朝向图像形成装置的光束检测传感器的激光束的强度的装置。 打印功率参考信号和光束检测功率参考信号通过第一开关选择性地连接到激光驱动器。 打印功率参考保持电容器和光束检测功率参考保持电容器通过与第一开关串联控制的第二开关选择性地连接到激光驱动器。 在每个扫描周期期间，输出激光功率被监测并用于调整两个保持电容器中的一个，使得打印功率和光束检测功率都具有受控参考。
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公开(公告)号：US08330785B2
公开(公告)日：2012-12-11
申请号：US13222965
申请日：2011-08-31
IPC分类号： B41J2/435
摘要： An apparatus for switching and controlling the intensity of a laser beam directed toward a beam detect sensor for an image forming device. A printing power reference signal and a beam detect power reference signal is selectively connected to a laser driver through a first switch. A printing power reference holding capacitor and a beam detect power reference holding capacitor is selectively connected to the laser driver through a second switch that is controlled in tandem with the first switch. During each scan cycle, the output laser power is monitored and used to adjust one of the two holding capacitors based such that both the printing power and the beam detect power have a controlled reference.
摘要翻译： 一种用于切换和控制朝向图像形成装置的光束检测传感器的激光束的强度的装置。 打印功率参考信号和光束检测功率参考信号通过第一开关选择性地连接到激光驱动器。 打印功率参考保持电容器和光束检测功率参考保持电容器通过与第一开关串联控制的第二开关选择性地连接到激光驱动器。 在每个扫描周期期间，输出激光功率被监测并用于调整两个保持电容器中的一个，使得打印功率和光束检测功率都具有受控参考。
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