公开(公告)号：JP2004229284A

公开(公告)日：2004-08-12

申请号：JP2004008548

申请日：2004-01-15

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： DITTRICH DANIELLE K ,  ERNST LARRY M

IPC: B41J2/52 ,  H04N1/387 ,  H04N1/40 ,  H04N1/405

CPC classification number: H04N1/40068 ,  H04N1/405

Abstract: PROBLEM TO BE SOLVED: To provide an image processing method and apparatus for enhancing the quality of a printed image without degrading performance or throughput of an entire printer by simulating two-bit pel printing on a bi-level printer using intelligent double dotting.
SOLUTION: The bi-level printer prints a 2N dpi 1-bit/pel image through intelligent double dotting to enhance the quality of a half resolution rendered image to approach a print quality as if the image is rendered at full resolution. In one embodiment, an enhanced resolution mode which uses a bi-level printer's 1,200 dpi mode to print 600 dpi, two bit/pel images, results in an image having higher resolution quality than rendering the image using traditional halftone methods at either 600 dpi or 1,200 dpi. An image enhancement method through higher order resolution multiplication is also disclosed.
COPYRIGHT: (C)2004,JPO&NCIPI

公开(公告)号：JP2006213058A

公开(公告)日：2006-08-17

申请号：JP2006019430

申请日：2006-01-27

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： ERNST LARRY M ,  WILSON JOHN C

IPC: B41J2/44 ,  B41J2/52

CPC classification number: G06K15/1223 ,  G06K15/128

Abstract: PROBLEM TO BE SOLVED: To provide a method, a system and a program for performing multiple-pel print quality enhancement (PQE) using amplitude modulation.
SOLUTION: A determination is made of an adjusted peak amplitude value of each pel of an image. At least two adjacent pels are then grouped together, and a determination is made of a peak amplitude value that will serves as a gray amplitude value for each pel in the pel group. Also determined is position information indicating the alignment of the peak amplitude within the combined area. The combined peak amplitude and position information are sent as input to an amplitude modulator operating at a speed equal to the video data rate of the printer divided by the number of pels for which the peak amplitude data is combined.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种使用幅度调制来执行多像素打印质量增强（PQE）的方法，系统和程序。 解决方案：确定图像的每个像素的调整的峰值振幅值。 然后将至少两个相邻像素组合在一起，并且确定将用作像素组中的每个像素的灰度幅度值的峰值振幅值。 还确定了指示组合区域内的峰值振幅的对准的位置信息。 组合的峰值幅度和位置信息作为输入发送到以等于打印机的视频数据速率除以峰值数据被组合的像素数量的速度操作的幅度调制器。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：CA1157509A

公开(公告)日：1983-11-22

申请号：CA363911

申请日：1980-11-04

Applicant: IBM

Inventor： ERNST LARRY M ,  MCCOLLUM WILLIAM E ,  QUEENER CARL A ,  WILZBACH BERNARD L

IPC: G03B27/28 ,  G03G15/00 ,  G03G15/30 ,  G03G21/00 ,  G03G21/20

Abstract: COMPONENT MOUNTING APPARATUS USEFUL FOR COMPACT COPIERS Electrical components in an elongated array are suspended within the interior of a sleeve type closed loop member such as a rotatable photoconductor drum or closed loop belt of a compact copier. Preferably some of the components are mounted on a board and held within the sleeve by edge slots or the like in sleeve mounting end caps, attached to the machine frame. A drive motor can be attached as part of the array and further can be arranged to drive a fan blade so that cooling air is forced through the sleeve and over the components so that the sleeve acts as a plenum. Power can be coupled from the drive motor through the end mounts to motivate the sleeve in the direction of its closed loop and/or apply power to other components of the copier. B0977072

公开(公告)号：CA1114012A

公开(公告)日：1981-12-08

申请号：CA307365

申请日：1978-07-13

Applicant: IBM

Inventor： BACON JAMES L ,  ERNST LARRY M ,  HAUPTMAN WILLIAM G

IPC: G03G13/02 ,  G03G15/02 ,  G03G21/00

Abstract: An improved regulated power supply for a Corona Charging Unit. More specifically, a digitally regulated power supply for the corona charging unit of an electrostatic copying machine in which a sample of the ionic current of the corona unit is utilized in conjunction with digital regulator means to regulate the power supply means establishing the charge of the corona. The digital regulator means in conjunction with at least one pulse width modulated power supply permits very fast rise and fall times of the power supply current. Thus, the ability to switch "corona's" on and off in an area of the photoconductor much narrower in width than the width of the corona unit is provided. Further, between duty cycles of the machine, the regulator stores a representation of the correct operating point of the corona charging unit determined in the immediately prior duty cycle. In the next duty cycle, the representation is utilized to initially regulate the power supply. The regulated power supply although having particular merit and utility when employed in a xerographic copier, or the like, also may be advantageously employed, with or without obvious modification in numerous other types of apparatus, e.g.. servomechanisms, printed circuit motor driver, Precipitrons. etc.

公开(公告)号：CA1115329A

公开(公告)日：1981-12-29

申请号：CA321244

申请日：1979-02-08

Applicant: IBM

Inventor： ERNST LARRY M ,  SEIGAL STEVEN D ,  VAN CLEAVE GEORGE W

IPC: G03G21/00 ,  G03G15/00 ,  G03G15/08 ,  G03G15/11 ,  G03G15/22

Abstract: DYNAMIC REFERENCE FOR AN IMAGE QUALITY CONTROL SYSTEM A system for checking copy quality variables within the image area of an electrophotographic machine. During a test cycle, quality is checked by producing sample test areas within the photoconductor image area ordinarily used for producing copies. Reflectance measurements are made on the sample test areas and compared to a dynamically floating reference achieved by a reflectance measurement from a cleaned portion of the photoconductor within the image area. The testing circuit is balanced so that the same reflectance voltage should be generated whether the single reflectivity-sensing device is viewing a sample test area or a cleaned reference area. The system checks for quality variables such as toner concentration, image voltage and an abnormally low reflectance photoconductor and provides a partial check on its own fault-free condition during periods when it is not in use.

公开(公告)号：CA1173890A

公开(公告)日：1984-09-04

申请号：CA380146

申请日：1981-06-18

Applicant: IBM

Inventor： DODGE JOHN H ,  ERNST LARRY M

IPC: G03G15/22 ,  G03G21/00 ,  G03G21/14 ,  G03G15/00

Abstract: BO980-009 The start-up of copier operations is controlled according to the position of the copier's photosensitive drum when power to the copier was shut-off, without the need for special memory elements for storing the photosensitive drum's position upon power shut-off.

公开(公告)号：CA1162587A

公开(公告)日：1984-02-21

申请号：CA363915

申请日：1980-11-04

Applicant: IBM

Inventor： CHAMPION JAMES R ,  ERNST LARRY M ,  FORD LELAND W ,  VELARDE RONALD G

IPC: G01R29/12 ,  G01R19/00 ,  G03G15/00 ,  G03G15/02 ,  G03G15/06 ,  G03G21/00

Abstract: Factors affecting copy quality are continuously adjusted during copying in accordance with the actual charge on the photoconductor relative to a fixed reference potential. The photoconductor, carried on a moving, partially exposed, constant potential conductive support, is sensed by a probe. The probe supplies a signal as a function of the potential on portions of the photoconductor and the conductive support passing by the probe. A circuit converts the probe signals into digitized values representing the current photoconductor potential relative to the support. The digitized values adjust copier parameters to compensate for deviations of photoconductor potential from predetermined desired values. B0977024

公开(公告)号：CA1172305A

公开(公告)日：1984-08-07

申请号：CA405395

申请日：1982-06-17

Applicant: IBM

Inventor： ERNST LARRY M

IPC: G03G21/00 ,  G03G15/00

Abstract: B0980022 Data correlated to the light reflectance of a maximum toned area and a minimum toned area is recorded to establish standards for monitoring and controlling subsequent copier operation. A test pattern is imaged onto the photoconductor by controlled illumination levels in a series of steps with the detection of light reflectance from that test pattern being subsequently compared to establish the maximum black and maximum white criteria for storage. Light reflected from cleaned photoconductor areas and subsequently established toner patches then are used to compare against the original test pattern reflectance data. Toner replenishment, controls and machine function monitoring (e.g.: white copy background, developer operation, etc.) are based on these recorded standards from the test pattern.