公开(公告)号：US20010012111A1

公开(公告)日：2001-08-09

申请号：US09014296

申请日：1998-01-27

Applicant: HEWLETT-PACKARD COMPANY

Inventor： EMAD M. AWADALLA ,  THOMAS CAMIS

IPC: G06F015/00 ,  B41B001/00 ,  G06K001/00 ,  B41J001/00

CPC classification number: H04N1/4056 ,  G03G15/0849

Abstract: A method and apparatus for developing a pixel in an image forming device includes split developing the pixel using a split sub-pixel modulation technique. Split development provides for at least two non immediately adjacent areas of the pixel to be developed more fully than an area in between the two non immediately adjacent areas. In the context of a laser printer, the laser is sub-pixel modulated at least twice upon the electrophotoconductive drum for selected pixels, thus effectuating a reduced discharge of the drum and reduced subsequent development of toner mass thereon. This controlled amount of developed toner mass reduces toner waste and toner scatter while maintaining image integrity.

Abstract translation: 用于在图像形成装置中显影像素的方法和装置包括使用分割子像素调制技术对像素进行分割。 分割显影提供像素的至少两个非直接相邻的区域比两个非紧邻区域之间的区域更完整地开发。 在激光打印机的上下文中，对于所选择的像素，激光器在电子感光鼓上被亚像素调制至少两次，从而实现鼓的减小的放电并减少其上的调色剂质量的随后的显影。 显影的调色剂质量的这种受控量减少了调色剂废料和调色剂的散射，同时保持了图像的完整性。

公开(公告)号：US20010013939A1

公开(公告)日：2001-08-16

申请号：US09371160

申请日：1999-08-10

Applicant: HEWLETT-PACKARD COMPANY

Inventor： JEFFREY S. WEAVER ,  THOMAS CAMIS ,  JAMES G. BEARSS

IPC: B41J001/00 ,  G06K001/00 ,  B41B001/00 ,  G06F015/00

CPC classification number: H04N1/4056 ,  G03G15/04072 ,  G03G15/0849 ,  G03G15/0856 ,  G03G15/326 ,  G03G15/556 ,  G03G2215/0888

Abstract: An imaging device is enabled to stabilize toner mass usage by implementing a closed loop feedback system. Actual toner mass per area used is compared with a target mass per area reference to produce an error signal for modifying toner consumption in the imaging device. A method for stabilizing toner mass consumption in an imaging device includes calculating first indicia indicative of an actual mass per area of toner consumed in the imaging device, comparing the first indicia with second indicia indicative of a target mass per area of toner consumed, and modifying toner consumption in the imaging device based on the comparing. In a preferred embodiment, a toner level sensed is compared to an original toner reference amount to produce a toner mass used. Pixels rendered are tracked to calculate a total area imaged relative to a time frame established in association with the original toner reference amount. The total mass used is divided by the total area imaged to produce the actual mass per area used. Toner consumption is modified using laser pulse width modulation or pixel masking such that subsequent actual mass per area of toner consumed approaches the target mass per area.

Abstract translation: 通过实施闭环反馈系统，能够使成像装置稳定调色剂的使用。 将每个使用的面积的实际调色剂质量与每个面积参考的目标质量进行比较，以产生用于改变成像装置中的调色剂消耗的误差信号。 用于稳定成像装置中的调色剂质量消耗的方法包括计算指示成像装置中消耗的调色剂的每个面积的实际质量的第一标记，将第一标记与指示每消耗的调色剂面积的目标质量的第二标记进行比较，以及修改 基于比较的成像装置中的墨粉消耗。 在优选实施例中，将感测到的调色剂水平与原始调色剂参考量进行比较以产生使用的调色剂质量。 跟踪渲染的像素以计算相对于与原始调色剂参考量相关联建立的时间帧成像的总区域。 使用的总质量除以被成像的总面积以产生每个使用面积的实际质量。 使用激光脉冲宽度调制或像素掩蔽修改调色剂消耗，使得消耗的调色剂面积的后续实际质量接近每个面积的目标质量。