公开(公告)号：US20100150620A1

公开(公告)日：2010-06-17

申请号：US12711293

申请日：2010-02-24

申请人： Yee S. Ng ,  Robert C. Logel

发明人： Yee S. Ng ,  Robert C. Logel

IPC分类号： G03G15/01 ,  G03G15/20

CPC分类号： G03G15/2064 ,  G03G15/0194 ,  G03G15/6585 ,  G03G2215/00801 ,  G03G2215/00805 ,  G03G2215/0081 ,  G03G2215/0119

摘要： A tandem color electrostatographic printer apparatus has five or more color printing stations or modules for applying respective color separation toner images to a receiver member to form a pentachrome color image in a single pass. A fuser station fuses the pentachrome color image. A clear toner overcoat is then applied to the fused pentachrome toner image and enhanced glossing of the image is provided by a belt glosser to improve color gamut.

摘要翻译： 串联彩色静电打印机装置具有五个或更多个彩色印刷站或模块，用于将相应的分色调色剂图像施加到接收器构件，以在单次通过中形成五面体彩色图像。 定影站熔化五色彩图像。 然后将透明的调色剂外涂层施加到熔融的五色调调色剂图像上，并且通过带状胶卷机提供图像的增强的光泽度以改善色域。

公开(公告)号：US07016070B2

公开(公告)日：2006-03-21

申请号：US09794693

申请日：2001-02-27

申请人： Hieu T. Pham ,  Yee S. Ng ,  Shawn E. O'Hara ,  William L. Chapman

发明人： Hieu T. Pham ,  Yee S. Ng ,  Shawn E. O'Hara ,  William L. Chapman

IPC分类号： G06F15/00

CPC分类号： H04N1/4056 ,  H04N1/40031

摘要： A product and process for an LED printhead used in electrophotographic printing that generates an exposure clock on the printhead for the LEDs. The present invention provides a high-speed interface that transmits print data that has been modified, or corrected, using the corresponding unique printhead brightness data as the base reference source data to the printhead boards. The corrected print data is then applied to the LED drivers that expose each LED simultaneously and uniquely. A non-linear clock is applied to the LED drivers as the reference clock to create the unique LED on time circuit. An Exposure RAM stores the data as parallel 8-bit data. A LATCH code received at an ASIC converts the Exposure RAM data into a serial bit stream. The preferred embodiment employs a 60 MHz clock, however, it should be readily apparent that numerous other clocking speeds can be employed. From this a linear or non-linear clock stream is created allowing 256 unique (linear or non-linear) exposure on times to the printhead driver circuitry. This is accomplished with a non-linear clock stream which allows a unique period for each clock period which then allows each increment of exposure time to be unique.

公开(公告)号：US5600761A

公开(公告)日：1997-02-04

申请号：US475447

申请日：1995-06-07

申请人： Yee S. Ng ,  Hurjay Yeh ,  Michael A. Pickup

发明人： Yee S. Ng ,  Hurjay Yeh ,  Michael A. Pickup

IPC分类号： G06K15/00 ,  G06T3/40 ,  H04N1/409 ,  G06T5/00

CPC分类号： H04N1/4092 ,  G06K15/00 ,  G06K15/1874 ,  G06T3/403 ,  G06K2215/006 ,  G06K2215/0071

摘要： A system for performing edge enhancement of mixed low resolution image files employs a binarization and sorting unit to sort data that is indicative of binary data from the mixed low resolution image input file. The sorted binary data is then supplied to a binary data edge enhancement processor for edge enhancement processing. The output from the binary data edge enhancement processor unit is supplied to a data merger unit along with the original image data. The data merger unit determines whether the original image data was part of a gray-scale image. If the data merger determines the original data is part of a gray-scale image, the original data is supplied as the output of the processing system. If the data merger determines that the original data is binary image data, the output from the binary edge enhancement processor unit is supplied as the output of the processing system.

摘要翻译： 用于执行混合低分辨率图像文件的边缘增强的系统采用二值化和分类单元对来自混合低分辨率图像输入文件的二进制数据进行排序的数据。 然后将分类的二进制数据提供给用于边缘增强处理的二进制数据边缘增强处理器。 来自二进制数据边缘增强处理器单元的输出与原始图像数据一起提供给数据合并单元。 数据合并单元确定原始图像数据是否是灰度图像的一部分。 如果数据合并确定原始数据是灰度图像的一部分，则将原始数据作为处理系统的输出提供。 如果数据合并确定原始数据是二进制图像数据，则提供来自二进制边缘增强处理器单元的输出作为处理系统的输出。

公开(公告)号：US5359431A

公开(公告)日：1994-10-25

申请号：US894858

申请日：1992-06-05

申请人： Yee S. Ng

发明人： Yee S. Ng

IPC分类号： H04N1/405 ,  H04N1/40

CPC分类号： H04N1/4057 ,  H04N1/4058

摘要： A method and arrangement for reproducing an original image, scans an original image to produce a digitized image, this digitized image containing a plurality of pixels. The pixels are grouped into cells, and the pixels in each cell are classified into one of at least two classes. An exposure level for printing these pixels is modified according to this classification. The pixels are printed according to the modified exposure levels to reproduce the original image with even halftone lightness jumps.

摘要翻译： 用于再现原始图像的方法和装置，扫描原始图像以产生数字化图像，该数字化图像包含多个像素。 像素被分组成单元格，并且每个单元格中的像素被分类为至少两个类别中的一个。 根据这种分类修改打印这些像素的曝光级别。 根据修改的曝光水平打印像素以再现具有均匀半色调亮度跳跃的原始图像。

公开(公告)号：US5198910A

公开(公告)日：1993-03-30

申请号：US794367

申请日：1991-11-13

申请人： Yee S. Ng ,  Hwai T. Tai

发明人： Yee S. Ng ,  Hwai T. Tai

IPC分类号： H04N1/405

CPC分类号： H04N1/405

摘要： An image processing system renders halftone images with an increased number of gray level steps without increasing the number of sub-elements in the halftone cells. A document copying apparatus which generates a plurality of electrical image signals of successive picture elements of an original document compares input image signals representing low optical density picture elements of the original document to a series of threshold values selected from a two dimensional matrix halftone cell in which an output signal density pattern grows in a low spacial frequency manner; compares input image signals representing high optical density picture elements to a series of threshold values selected from a two dimensional matrix halftone cell in which an output signal density pattern grows in a high spacial frequency manner; and compares input image signals representing mid-optical density picture elements to a series of threshold values selected from the first or the second halftone cells according to the optical density of the picture element.

摘要翻译： 图像处理系统使得半色调图像具有增加的灰度级步数，而不增加半色调单元中的子元素的数量。 产生原始文件的连续图像元素的多个电子图像信号的文件复制装置将表示原始文档的低光密度像素的输入图像信号与从二维矩阵半色调单元中选择的一系列阈值进行比较，其中 输出信号密度模式以低空间频率生长; 将表示高光密度像素的输入图像信号与选自输出信号密度图案以高空间频率方式生长的二维矩阵半色调单元中的一系列阈值进行比较; 并且根据图像元素的光密度将表示中等密度的图像元素的输入图像信号与从第一或第二半色调单元中选择的一系列阈值进行比较。

公开(公告)号：US5185661A

公开(公告)日：1993-02-09

申请号：US762191

申请日：1991-09-19

申请人： Yee S. Ng

发明人： Yee S. Ng

IPC分类号： H04N1/60

CPC分类号： H04N1/603 ,  H04N1/6019 ,  H04N1/6058

摘要： An input scanner and print engine system corrects for color interpretation errors in the input scanner's color filter set and maps the requested input colors to an output color printable by the printer in a uniform color space. A 3.times.3 transform matrix partially corrects for the color interpretation errors of the color filter set as well as maintaining the neutrality in the transformation and a non-linearly loaded lookup table further corrects the color interpretation errors for outlying datapoints in the actual color space. A color gamut compression lookup table is used to perform non-linear compression for each axis of the color space. Inside the output color gamut, a substantially one-to-one correspondence is performed by the compression table but near the outer color gamut boundary, compression is non-linearly performed. In this manner, colors lying outside of the printable output color gamut are compressed to a region within or on the surface color of the printable color gamut.

摘要翻译： 输入扫描仪和打印引擎系统校正输入扫描仪的滤色器组中的颜色解释错误，并将所请求的输入颜色映射到打印机在均匀颜色空间中可打印的输出颜色。 3x3变换矩阵部分地校正滤色器组的颜色解释误差以及维持变换中的中性，并且非线性加载的查找表进一步校正实际颜色空间中外围数据点的颜色解释误差。 使用色域压缩查找表对颜色空间的每个轴执行非线性压缩。 在输出色域内，通过压缩表执行大致一对一的对应关系，但是在外部色域边界附近，非线性地进行压缩。 以这种方式，位于可打印输出色域之外的颜色被压缩到可打印色域的表面颜色内或其上的区域。

公开(公告)号：US5125072A

公开(公告)日：1992-06-23

申请号：US386647

申请日：1989-07-31

申请人： Yee S. Ng

发明人： Yee S. Ng

IPC分类号： G06K15/00 ,  G06T11/60 ,  H04N1/387

CPC分类号： H04N1/3871 ,  G06K15/00 ,  G06K2215/0065 ,  G06K2215/0094

摘要： Apparatus and method for producing a page output from electronic input data consisting of text and line graphics information and of pictorial information. The text and graphics information is converted to two-bit per pixel data and stored in a page buffer. The pictorial information is originally stored at its originating pixel resolution and at a bit level sufficient to represent the full color content. This pictorial data is expanded to a finer pixel resolution at a four-bit level, per color, at the time data is to be merged with the text and graphics data. The merging is accomplished in a band or line buffer which combines the two-bit and four-bit data. A location table is used to keep track of the bit level transitions and to signal the output device that the data is in a particular format.

摘要翻译： 用于从由文本和线图形信息和图形信息组成的电子输入数据产生页面输出的装置和方法。 文本和图形信息被转换为每像素两位数据并存储在页缓冲器中。 图形信息最初以其起始像素分辨率存储并且处于足以表示全色内容的位电平。 在将数据与文本和图形数据合并的同时，该图形数据以每个颜色四位级别​​扩展到更精细的像素分辨率。 合并是在组合了2位和4位数据的频带或行缓冲器中实现的。 位置表用于跟踪位电平转换，并向输出设备通知数据是特定格式。

公开(公告)号：US5077159A

公开(公告)日：1991-12-31

申请号：US463218

申请日：1990-01-10

申请人： Yee S. Ng ,  Frederick R. Gilley

发明人： Yee S. Ng ,  Frederick R. Gilley

IPC分类号： G03G13/22 ,  G03G15/08

CPC分类号： G03G15/08 ,  G03G13/22

摘要： A weak electrostatic image on an imaging member is amplified by first toning it with charge injection toner. The imaging member is treated without fusing the toner image to reduce the charge injection inhibiting effect of charge associated with the toner imaging member interface. Subsequently to or simultaneously with said treating step the imaging member is charged positively, which charge injects through the toner to create an amplified electrostatic image that can be toned.

摘要翻译： 首先通过电荷注入调色剂对成像构件上的弱静电图像进行放大。 处理成像构件而不使调色剂图像定影，以减少与调色剂成像构件界面相关联的电荷的电荷注入抑制效果。 在所述处理步骤之后或与所述处理步骤同时，成像构件被正向充电，这些电荷通过调色剂注入以产生可调色的放大静电图像。

公开(公告)号：US5025322A

公开(公告)日：1991-06-18

申请号：US453421

申请日：1989-12-18

申请人： Yee S. Ng

发明人： Yee S. Ng

IPC分类号： B41J2/44 ,  B41J2/45 ,  B41J2/455 ,  G06F1/025 ,  H04N1/23 ,  H04N1/405

CPC分类号： H04N1/4056 ,  G06F1/025

摘要： A grey level non-impact recording apparatus and method provides data signals to a recording head having N recording elements per inch so that M sub-lines per inch can be recorded, wherein M is greater than N. In a specific example of a 400 dpi LED printhead, grey level data is sent to the printhead at a rate to record say 2400 lines per inch to provide a resolution of 400 dpi.times.2400 dpi grey level sub-pixels. Data from a data source may have a pixel resolution of 1/400".times.1/400" and the apparatus employs six sub-lines to record each of these pixels. The control for controlling the duration of recording of each LED for each sub-line includes a comparator which receives a grey level data signal at one input terminal and pulses representing a time changing count at another terminal. The count is produced by counter means and changes in response to signals from a clock means. Fine control over exposure, particularly at the "toe" of the exposure curve, is provided by a vernier-like clocking scheme wherein the counter means responds to alternate master clocks during recording of alternate sub-lines. The master clocks generate clock pulses at slightly different frequencies which thereby affect fine differences in the timing of the pulses from the counter means. In one embodiment the clock means may be a programmable non-linear clock and provides a greater range of grey level recording.

摘要翻译： 灰度级无影响记录装置和方法向具有每英寸N个记录元素的记录头提供数据信号，使得可以记录每英寸M个子行，其中M大于N.在400dpi的具体示例中 LED打印头，灰度级数据以每英寸2400行记录的速率发送到打印头，以提供400 dpix2400 dpi灰度级子像素的分辨率。 来自数据源的数据可以具有1/400“x1 / 400”的像素分辨率，并且该装置使用六条子线来记录这些像素中的每一个。 用于控制每个子线路的每个LED的记录持续时间的控制包括在一个输入端接收灰度级数据信号的比较器和表示在另一个终端处的时间变化计数的脉冲。 该计数由计数器装置产生并响应来自时钟装置的信号而改变。 特别是在曝光曲线的“脚趾”处的曝光的精细控制由游标式的时钟方案提供，其中计数器装置在备用子行记录期间响应备用主时钟。 主时钟以稍微不同的频率产生时钟脉冲，从而影响来自计数器装置的脉冲的定时的细微差异。 在一个实施例中，时钟装置可以是可编程非线性时钟并提供更大范围的灰度级记录。

公开(公告)号：US4980700A

公开(公告)日：1990-12-25

申请号：US522951

申请日：1990-05-14

申请人： Yee S. Ng

发明人： Yee S. Ng

IPC分类号： B41J2/465 ,  G06K15/12

CPC分类号： B41J2/465 ,  G06K15/1247

摘要： An LED printhead includes an optical mask overlying the LED's to balance light outputs therefrom. The transmission density of the mask is adjusted for each LED in accordance with its respective light output to adjust same so that the light outputs from all LED's are the same. The mask comprises a micro-lenslet incorporating a UV fadeable dye whose transmission density is adjusted with a UV laser or other light source while monitoring the light output from the respective LED. The transmission density of the mask may be adjusted by a UV light source provided on the printhead during periods of nonuse of the printhead or the printhead may be removed from the recording apparatus for adjustment. The micro-lenslet is formed by depositing a liquid polymeric binder in droplet form over the LED and having same set to form the lenslet in situ.

摘要翻译： LED打印头包括覆盖LED的光学掩模以平衡来自其的光输出。 根据其各自的光输出，针对每个LED调整掩模的透射密度以进行调整，使得来自所有LED的光输出相同。 该掩模包含一个包含紫外线可淡化染料的微型小透镜，其紫外线激光或其他光源调节其透光密度，同时监测来自各个LED的光输出。 可以通过在打印头不使用期间设置在打印头上的UV光源来调节掩模的透射密度，或者可以将打印头从记录装置移除以进行调节。 通过在LED上沉积液滴形式的液体聚合物粘合剂形成微小透镜，并且具有相同的组合以便原位形成小透镜。