公开(公告)号：EP0550190A2

公开(公告)日：1993-07-07

申请号：EP92311379.9

申请日：1992-12-14

申请人： XEROX CORPORATION

发明人： Corona, Stephen C.

IPC分类号： G03G15/00 ,  G03G15/01

CPC分类号： G01D15/10 ,  B41J2/45

摘要： The temperatures of LED print bars (40,50,60) utilized in a printing system are maintained within a specified differential range, with respect to each other. Each print bar has an associated heating (40A,50A,60A) and cooling (40C,50C,60C) element. The temperature of each print bar is monitored and compared during operation. When a temperature differential greater than a preset tolerance range is detected, either the hotter operating print bar is cooled or the lower operating print bar is heated, or a combination of cooling and heating is applied to the out-of-tolerance print bars. The cooling and/or heating of the print bars is continued until the temperature differential is reduced so as to be within the preselected or predefined range.

摘要翻译： 在打印系统中使用的LED打印条（40,50,60）的温度相对于彼此保持在指定的差分范围内。 每个打印条具有相关联的加热（40A，50A，60A）和冷却（40C，50C，60C）元件。 每个打印条的温度在操作期间被监测和比较。 当检测到大于预设公差范围的温度差时，要么更热操作的打印条被冷却或者下部操作打印条被加热，或者冷却和加热的组合被应用于超出公差的打印条。 印刷条的冷却和/或加热继续进行，直到温差降低到预选或预定的范围内。

公开(公告)号：EP0929185A2

公开(公告)日：1999-07-14

申请号：EP99300029.8

申请日：1999-01-04

申请人： XEROX CORPORATION

发明人： Corona, Stephen C.

IPC分类号： H04N1/40

CPC分类号： H04N1/40031

摘要： This invention enables enhanced addressability in the process direction when using light emitting printbars (106). A data source supplies a multiple bit word for each light emitting element (105) along a bus, with each word representing a sub-intervals exposure profile of an associated light emitting element (105). A latch (120) temporarily stores the word that represents the exposure profile for its associated light emitting element (105). A look-up table (130) decodes the temporarily stored word into a plurality of binary bits, with each bit representing the sub-interval exposure profile of its associated light emitting element (105). A parallel-to-serial converter (132) serially applies the sub-interval exposure profile binary bits to a logic element (134). That logic element (134) gates the exposure profile binary bits with a strobe signal from a controller (26). The output of the logic element (134) then causes the associated light emitting element (105) to illuminate.

摘要翻译： 当使用发光打印条（106）时，本发明能够提高处理方向上的可寻址性。 数据源沿着总线为每个发光元件（105）提供多位字，每个字代表相关发光元件（105）的子区间曝光轮廓。 锁存器（120）暂时存储表示其相关发光元件（105）的曝光简档的字。 查找表（130）将临时存储的字解码为多个二进制比特，其中每个比特表示其相关联的发光元件（105）的子间隔曝光曲线。 并行 - 串行转换器（132）将子区间曝光曲线二进制位串行地施加到逻辑元件（134）。 该逻辑元件（134）用来自控制器（26）的选通信号选通曝光轮廓二进制比特。 逻辑元件（134）的输出然后使相关的发光元件（105）发光。

公开(公告)号：EP0547854A2

公开(公告)日：1993-06-23

申请号：EP92311377.3

申请日：1992-12-14

申请人： XEROX CORPORATION

发明人： Corona, Stephen C. ,  Charnitski, George A.

IPC分类号： H04N1/46 ,  H04N1/04

CPC分类号： H04N1/047 ,  B41J2/45 ,  G06K15/1247 ,  G06K15/129 ,  H04N1/12 ,  H04N1/193 ,  H04N1/506 ,  H04N2201/02416 ,  H04N2201/02425 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04722 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04734 ,  H04N2201/04749 ,  H04N2201/04755 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04794 ,  Y10S362/80

摘要： An image bar recording system which utilizes a plurality of LED image bars to provide a plurality of latent images which may subsequently be developed in different colors. The print bars are initially aligned so that each color image is precisely registered at the same relative position along the exposed area of a photoreceptor belt (46). The alignment is accomplished by adding non-image fiduciary pixels (51,55) to the ends of each print bar and by forming a pair of opposed alignment apertures (40,42) in the surface of the belt. Y-axis alignment of the print bars is accomplished by detecting edge locations of a first pixel (P 1 ) and using this location to select a centrally located fiduciary pixel (P F ). The X-axis alignment is then obtained by rotating the print bar to bring a second selected image pixel into alignment as sensed through a second aperture. Once the initial X and Y-axis alignments are complete, subsequent alignment is maintained through subsequent passes by checking the positions of the previously identified pixels as they advance past additional lead edge apertures formed in the process direction along the belt surface.

摘要翻译： 它利用的LED图像棒一个多元化的图像记录系统栏提供一种可以随后以不同的颜色显影的潜图像的复数。 打印杆对齐INITIALLY所以没有每个颜色图像是在沿相片受体带（46）的暴露的区域中的相同的相对位置精确地登记。 该对准是通过将非图像受托像素（51,55），以各打印杆的端部并通过形成在带的表面的一对取向的相对孔径（40,42）来实现的。 打印杆的Y轴对准是通过检测第一像素（P1）的边缘位置，并使用这个位置来选择一个位于中心的受托像素（PF）来完成的。 X轴对准，然后通过旋转所述打印杆以使第二选择的图像的像素对准通过第二孔感测得到。 一旦初始X和Y轴对准完成后，随后的对准是通过对于随后由作为它们的像素预先过去附加引线边缘孔径在沿带表面的处理方向形成检查的先前识别的位置保持。

公开(公告)号：EP0547854B1

公开(公告)日：1998-08-05

申请号：EP92311377.3

申请日：1992-12-14

申请人： XEROX CORPORATION

发明人： Corona, Stephen C. ,  Charnitski, George A.

IPC分类号： H04N1/46 ,  H04N1/04

CPC分类号： H04N1/047 ,  B41J2/45 ,  G06K15/1247 ,  G06K15/129 ,  H04N1/12 ,  H04N1/193 ,  H04N1/506 ,  H04N2201/02416 ,  H04N2201/02425 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04722 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04734 ,  H04N2201/04749 ,  H04N2201/04755 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04794 ,  Y10S362/80

摘要： An image bar recording system which utilizes a plurality of LED image bars to provide a plurality of latent images which may subsequently be developed in different colors. The print bars are initially aligned so that each color image is precisely registered at the same relative position along the exposed area of a photoreceptor belt (46). The alignment is accomplished by adding non-image fiduciary pixels (51,55) to the ends of each print bar and by forming a pair of opposed alignment apertures (40,42) in the surface of the belt. Y-axis alignment of the print bars is accomplished by detecting edge locations of a first pixel (P1) and using this location to select a centrally located fiduciary pixel (PF). The X-axis alignment is then obtained by rotating the print bar to bring a second selected image pixel into alignment as sensed through a second aperture. Once the initial X and Y-axis alignments are complete, subsequent alignment is maintained through subsequent passes by checking the positions of the previously identified pixels as they advance past additional lead edge apertures formed in the process direction along the belt surface.

公开(公告)号：EP0608045B1

公开(公告)日：1998-06-10

申请号：EP94300022.4

申请日：1994-01-04

申请人： XEROX CORPORATION

发明人： Corona, Stephen C. ,  Fox, Elizabeth D. ,  Robinson, Norman D., Jr.

IPC分类号： B65H33/04

CPC分类号： B65H31/10 ,  B65H33/04 ,  B65H39/02 ,  G03G15/655 ,  G03G2215/00869 ,  G03G2215/00894

公开(公告)号：EP0663760A1

公开(公告)日：1995-07-19

申请号：EP95300220.1

申请日：1995-01-13

申请人： XEROX CORPORATION

发明人： Corona, Stephen C.

IPC分类号： H04N1/40 ,  H04N1/401

CPC分类号： H04N1/40031 ,  H04N1/4015

摘要： A digital LED printer is described which uses an improved control architecture to enable multi-exposure levels and multiple gray levels for a LED printbar. A plurality of LED chips are aligned in a row to form a printbar (27) of a length sufficient to expose the width of a recording medium, such as a photoreceptor drum or belt. Each LED chip has an associated driver chip (40) which controls the individual LED on/off time as well as the magnitude of current applied to each LED so as to maintain uniform exposure of each energized LED. The LED on/off time is controlled by selection of one of a plurality of two bit or four bit gray level strobe signals, which are decoded (38) according to system logic. The LED characteristics are measured (80) and stored (42) in a pre-operational mode to measure differences in gain characteristics; correction signals for each LED are then stored in memory and downloaded into the LED drive circuits at the end of each recorded line.

摘要翻译： 描述了一种数字LED打印机，其使用改进的控制架构来实现LED打印条的多曝光水平和多灰度级。 多个LED芯片被排列成一行以形成足以暴露记录介质（例如感光鼓或带）的宽度的打印条（27）。 每个LED芯片具有相关联的驱动器芯片（40），其控制单独的LED开/关时间以及施加到每个LED的电流的大小，以便保持每个通电的LED的均匀曝光。 LED开/关时间通过选择根据系统逻辑被解码（38）的多个二位或四位灰度级选通信号之一进行控制。 在预操作模式下测量（80）并存储（42）LED特性以测量增益特性的差异; 然后将每个LED的校正信号存储在存储器中，并将其下载到每个记录线的末端的LED驱动电路中。

公开(公告)号：EP0547854A3

公开(公告)日：1993-09-01

申请号：EP92311377.3

申请日：1992-12-14

申请人： XEROX CORPORATION

发明人： Corona, Stephen C. ,  Charnitski, George A.

IPC分类号： H04N1/46 ,  H04N1/04

CPC分类号： H04N1/047 ,  B41J2/45 ,  G06K15/1247 ,  G06K15/129 ,  H04N1/12 ,  H04N1/193 ,  H04N1/506 ,  H04N2201/02416 ,  H04N2201/02425 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04722 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04734 ,  H04N2201/04749 ,  H04N2201/04755 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04794 ,  Y10S362/80

摘要： An image bar recording system which utilizes a plurality of LED image bars to provide a plurality of latent images which may subsequently be developed in different colors. The print bars are initially aligned so that each color image is precisely registered at the same relative position along the exposed area of a photoreceptor belt (46). The alignment is accomplished by adding non-image fiduciary pixels (51,55) to the ends of each print bar and by forming a pair of opposed alignment apertures (40,42) in the surface of the belt. Y-axis alignment of the print bars is accomplished by detecting edge locations of a first pixel (P 1 ) and using this location to select a centrally located fiduciary pixel (P F ). The X-axis alignment is then obtained by rotating the print bar to bring a second selected image pixel into alignment as sensed through a second aperture. Once the initial X and Y-axis alignments are complete, subsequent alignment is maintained through subsequent passes by checking the positions of the previously identified pixels as they advance past additional lead edge apertures formed in the process direction along the belt surface.

公开(公告)号：EP0040547A1

公开(公告)日：1981-11-25

申请号：EP81302231.6

申请日：1981-05-19

申请人： XEROX CORPORATION

发明人： Corona, Stephen C. ,  Northrup, Karl A.

IPC分类号： H05B41/232

CPC分类号： H05B41/2325 ,  H01J61/92 ,  Y10S315/01

摘要： A low pressure gas discharge lamp (30) is provided with a pair of high power incandescent electrodes (32, 34) to increase output illumination at the lamp ends. In one embodiment, these electrodes are also used to enable the gas discharge. In an alternative construction, the electrodes are of high power and low emissivity and are electrically connected to a second pair of high emissivity electrodes (36,38) which provide the means for enabling the gas discharge. With this second construction, the low emissivity electrodes can act as ballast for the circuit.

公开(公告)号：EP1445111B1

公开(公告)日：2009-06-24

申请号：EP04001339.3

申请日：2004-01-22

申请人： Xerox Corporation

发明人： Corona, Stephen C. ,  Drake, Donald J.

IPC分类号： B41J2/45

CPC分类号： B41J2/451

公开(公告)号：EP1445111A1

公开(公告)日：2004-08-11

申请号：EP04001339.3

申请日：2004-01-22

申请人： Xerox Corporation

发明人： Corona, Stephen C. ,  Drake, Donald J.

IPC分类号： B41J2/45

CPC分类号： B41J2/451

摘要： A xerographic print engine employs a photoreceptor with an image receiving surface, a printhead for directing light to the photoreceptor to produce thereon a latent image, and a developer for converting the latent image to a printable image to be transferred from the photoreceptor to a print medium during a relative motion between the photoreceptor and the print medium. The printhead has light emitting diodes (84) disposed in plural rows (82,86) arranged alongside each other on a substrate which also supports driver circuitry connecting with imaging electronics for activating individual ones of the diodes. An optical element (lens 30) focuses light of the diodes onto a row of the latent image, the focussing being accomplished concurrently for individual ones of the diodes located in a plurality of the rows.

摘要翻译： 静电印刷引擎采用具有图像接收表面的感光体，用于将光引导到感光体以在其上产生潜像的打印头和用于将潜像转换成可从感光体转印到打印介质的可打印图像的显影剂 在感光体和打印介质之间的相对运动期间。 打印头具有设置在基板上彼此并排设置的多行（82,86）的发光二极管（84），该基板还支持与用于激活二极管中的各个的成像电子装置连接的驱动器电路。 光学元件（透镜30）将二极管的光聚焦到潜像的行上，同时针对位于多个行中的各个二极管同时完成聚焦。