公开(公告)号：US20040090522A1

公开(公告)日：2004-05-13

申请号：US10291923

申请日：2002-11-07

Applicant: Xerox Corporation

Inventor： Russell B. Rauch ,  Michael B. Neary ,  Mohammad H. Rahnavard ,  Michael J. Thomas ,  Thomas M. Baretsky

IPC: B41J002/435 ,  B41J002/47 ,  B41J002/385

CPC classification number: G06K15/1219 ,  H04N1/053 ,  H04N1/1135 ,  H04N2201/04712 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04777 ,  H04N2201/04793

Abstract: A system architecture for scanned non-linearity correction in a printer uses any raster output scanner having scanned non-linearity profile previously stored in memory from a test station installed with any pixel board. The pixel board includes a correction table register wherein the pixel board utilizes the scanned non-linearity profile of the raster output scanner to calculate the correction table register to correct for pixel misregistration.

Abstract translation: 在打印机中扫描的非线性校正的系统架构使用任何光栅输出扫描器，其具有先前存储在存储器中的扫描的非线性分布图，该测试台安装有任何像素板。 像素板包括校正表寄存器，其中像素板利用光栅输出扫描器的扫描的非线性分布来计算校正表寄存器以校正像素重合失调。

公开(公告)号：US20040061771A1

公开(公告)日：2004-04-01

申请号：US10260612

申请日：2002-09-27

Applicant: Xerox Corporation

Inventor： Mohammad H. Rahnavard ,  Mehrdad Zomorrodi

IPC: B41J002/47

CPC classification number: B41J2/471 ,  G06K15/1223 ,  G06K2215/0094

Abstract: An electronic trapping implementation in imager with laser driver is provided by comparing an output image from the imager to a reference image to obtain a difference image and calculating one or more frequency and amplitude modulations based on the difference image and applying the one or more frequency and amplitude modulations to the imager until the difference image is eliminated.

Abstract translation: 通过将来自成像器的输出图像与参考图像进行比较来获得差分图像并基于差分图像计算一个或多个频率和幅度调制并应用一个或多个频率和 到成像器的幅度调制直到差分图像被消除。

公开(公告)号：US20040041901A1

公开(公告)日：2004-03-04

申请号：US10232438

申请日：2002-08-29

Applicant: Xerox Corporation

Inventor： Mohammad H. Rahnavard ,  Mehrdad Zomorrodi

IPC: B41J002/47

CPC classification number: G06K15/1271 ,  G06K2215/0085

Abstract: A method for banding suppression due to vibration in an image forming and/or image receiving apparatus with laser driver utilizes governing equations which relate the on/off time and intensity to velocity and frequency of vibration are disclosed. Using derived formulas, an amplitude and frequency modulation (AM/FM) combination is used to suppress the banding due to vibration. The equation which governs the on/off time (FM) is t1nulle sin(2nullft1)/vnnullt0. This transcendental equation can be solved for the required on-time t1 in terms of the nominal on-time t0, e (vibration amplitude ), v0 (nominal velocity) and f (vibration frequency). The equation which governs the intensity is H3(t)nullv(t)/v0. H3(t) controls the level of irradiance. This method is further extended to multi-temporal vibration frequency and may correct banding due to irradiance modulation.

Abstract translation: 公开了一种使用激光驱动器的图像形成和/或图像接收装置中由于振动引起的带状抑制的方法，利用将开/关时间和强度与振动的速度和频率相关联的控制方程。 使用派生公式，使用幅度和频率调制（AM / FM）组合来抑制由于振动引起的条带。 控制开/关时间（FM）的方程是t1 + e sin（2pift1）/ vn = t0。 根据标称导通时间t0，e（振幅），v0（标称速度）和f（振动频率），可以求出所需的导通时间t1的超验方程。 控制强度的方程式为H3（t）= v（t）/ v0。 H3（t）控制辐照度。 该方法进一步扩展到多时间振动频率，并且可以由于辐照调制来校正条带。

公开(公告)号：US20040041900A1

公开(公告)日：2004-03-04

申请号：US10232476

申请日：2002-08-29

Applicant: Xerox Corporation

Inventor： Mohammad H. Rahnavard ,  Mehrdad Zomorrodi

IPC: B41J002/47 ,  B41J002/40 ,  B41J002/405

CPC classification number: G06K15/1271 ,  G06K2215/0085

Abstract: A method for banding suppression due to vibration in an imager utilizing a light emitting diode (LED) array is disclosed. By characterizing the LED array and knowing the amplitude and frequency of the signal due to vibration which causes the banding, the LEDs' driving currents are modulated in reverse direction corresponding to the banding signal to suppress the banding.

Abstract translation: 公开了一种利用发光二极管（LED）阵列的成像器中由于振动引起的带状抑制的方法。 通过表征LED阵列并知道由于导致条带的振动引起的信号的幅度和频率，LED的驱动电流在对应于条带信号的相反方向上被调制以抑制条带。