公开(公告)号：US5963243A

公开(公告)日：1999-10-05

申请号：US335997

申请日：1994-11-08

申请人： Kei Hara ,  Yoriyuki Sunaga

发明人： Kei Hara ,  Yoriyuki Sunaga

IPC分类号： G06K15/12 ,  B41J2/47 ,  G01D15/14 ,  G02B26/00 ,  B41J15/34

CPC分类号： G06K15/1219 ,  G06K15/1223

摘要： An exposing device is composed of a photosensitive drum having a surface partitioned into a plurality of exposure areas in a main scanning direction, for carrying an image formed by exposing the surface, a laser light source for emitting a laser beam, a polygon mirror for rotating at a constant speed to scan the surface of the photosensitive drum in the main scanning direction with the laser beam from the laser light source, and an exposure control circuit for producing items of emission data for one line while the number of emission data items for one dot is varied for each exposure area, and for supplying the emission data items for one line to the laser light source in response to a print clock pulse. Particularly, the exposure control circuit includes a CPU for multiplying a reference value for the number of data items which should be selected from emission data items for a dot and changed in value to obtain a predetermined function, by a coefficient for an exposure area to which the emission data items for the dot are assigned, and for changing the value of each data item selected from the emission data items for the dot in number corresponding to a result of multiplication.

摘要翻译： 曝光装置由具有在主扫描方向上划分成多个曝光区域的表面的感光鼓构成，用于承载通过暴露表面形成的图像，用于发射激光束的激光源，用于旋转的多面镜 以恒定的速度用激光源的激光束在主扫描方向上扫描感光鼓的表面;以及曝光控制电路，用于产生一行的发射数据项，而一个发射数据项的数量 针对每个曝光区域改变点，并且响应于打印时钟脉冲向激光光源提供一行的发射数据项。 特别地，曝光控制电路包括：CPU，用于将要从点的发射数据项中选择的数据项的数量的参考值与值变化以获得预定的功能，乘以曝光区域的系数， 分配点的发光数据项，并且用于改变从对应于乘法结果的数量的点的发射数据项中选择的每个数据项的值。