发明授权
US5193011A Method and apparatus for producing variable width pulses to produce an
image having gray levels
失效
用于产生可变宽度脉冲以产生具有灰度级的图像的方法和装置
- 专利标题： Method and apparatus for producing variable width pulses to produce an image having gray levels
- 专利标题（中）： 用于产生可变宽度脉冲以产生具有灰度级的图像的方法和装置
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申请号： US592468申请日： 1990-10-03
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公开(公告)号： US5193011A公开(公告)日： 1993-03-09
- 发明人: Gary A. Dir , Fred W. Schmidlin , John D. Sotack , Joseph F. Stephany
- 申请人： Gary A. Dir , Fred W. Schmidlin , John D. Sotack , Joseph F. Stephany
- 申请人地址： CT Stamford
- 专利权人： Xerox Corporation
- 当前专利权人： Xerox Corporation
- 当前专利权人地址： CT Stamford
- 主分类号： B41J2/52
- IPC分类号： B41J2/52 ; B41J2/44 ; G03G17/00 ; H04N1/23 ; H04N1/29 ; H04N1/40 ; H04N1/405
摘要：
A system for printing gray levels without needing to use halftone cells. An architecture is disclosed for controlling printing elements to deposit a variable amount of toner onto a given area of paper. The architecture includes a pixel memory for determining a gray level for each pixel in a row, and a counter for incrementing a gray level. A comparator compares a memory location corresponding to a certain pixel with the output of the counter, and the comparison result is then applied to a printing element corresponding to the pixel.
公开/授权文献
- US5680057A Integrated circuit testing assembly and method 公开/授权日：1997-10-21
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