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11. 发明授权

US08976426B2 Light source driving circuit, optical scanning device, and image forming apparatus 有权
标题翻译：光源驱动电路，光扫描装置和图像形成装置
公开(公告)号：US08976426B2
公开(公告)日：2015-03-10
申请号：US14262902
申请日：2014-04-28
申请人： Atsufumi Omori , Muneaki Iwata , Hayato Fujita
发明人： Atsufumi Omori , Muneaki Iwata , Hayato Fujita
IPC分类号： H04N1/04 , H04N1/00 , H04N1/113
CPC分类号： H04N1/00819 , H04N1/113 , H04N1/40056 , H04N2201/0458
摘要： A light source driving circuit that drives a light source includes a driving electric current generator that generates a driving electric current including a predetermined electric current, a first auxiliary current, and a second auxiliary current; and a controller that sets values of the first and second auxiliary currents by using first and second lighting pattern signals, wherein each of the first and second lighting pattern signals is for controlling supply of the predetermined electric current to the light source. After setting a first value of the first auxiliary current, a second value of the second auxiliary current is set by using the second lighting pattern signal that defines a time period for stopping supply of the predetermined electric current to be shorter than a time period for stopping the supply of the predetermined electric current that is defined by the first lighting pattern signal.
摘要翻译：驱动光源的光源驱动电路包括产生包括预定电流，第一辅助电流和第二辅助电流的驱动电流的驱动电流发生器; 以及控制器，其通过使用第一和第二照明模式信号来设定第一和第二辅助电流的值，其中第一和第二照明模式信号中的每一个用于控制向光源的预定电流的供应。在设置了第一辅助电流的第一值之后，通过使用限定用于停止预定电流的供给的时间段的第二点亮模式信号来设定第二辅助电流的第二值短于停止的时间段提供由第一照明模式信号限定的预定电流。

12. 发明申请

US20140327938A1 IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD 有权
标题翻译：图像形成装置和图像形成方法
公开(公告)号：US20140327938A1
公开(公告)日：2014-11-06
申请号：US14257435
申请日：2014-04-21
申请人： Masaaki ISHIDA , Atsufumi Omori , Muneaki Iwata , Hayato Fujita
发明人： Masaaki ISHIDA , Atsufumi Omori , Muneaki Iwata , Hayato Fujita
IPC分类号： G06K15/02
CPC分类号： G06K15/1881 , G03G15/043 , G03G15/5054 , G03G15/5058 , G06T3/40 , G06T3/4007 , G06T3/403 , G06T5/002 , G06T5/003
摘要： An image forming apparatus forms an image by irradiating light from a light source to an image carrier. The image forming apparatus includes: an image processing unit that processes image data at resolution N; and a control unit that generates modulation data to drive the light source at resolution m×N (m is a positive integer equal to or larger than 2), which is higher than the resolution N, based on the processed image data. Processing at the image processing unit is pseudo-halftone processing to perform line thinning or thickening on a part of the image data. The control unit converts the image data at the resolution N that has been subjected to the pseudo-halftone processing into data at the resolution m×N, and adjusts an amount of light for a part of the image data based on the resolution m×N.
摘要翻译：图像形成装置通过将来自光源的光照射到图像载体来形成图像。图像形成装置包括：图像处理单元，以分辨率N处理图像数据; 以及控制单元，其基于处理的图像数据生成调制数据，以以分辨率N高于分辨率N的分辨率m×N（m为等于或大于2的正整数）驱动光源。在图像处理单元处的处理是伪半色调处理，以对图像数据的一部分进行线条变薄或增厚。控制单元将经过伪半色调处理的分辨率N的图像数据以分辨率m×N转换成数据，并且基于分辨率m×N调整图像数据的一部分的光量。

13. 发明申请

US20120189328A1 IMAGE FORMING APPARATUS 有权
标题翻译：图像形成装置
公开(公告)号：US20120189328A1
公开(公告)日：2012-07-26
申请号：US13354789
申请日：2012-01-20
申请人： Seizo Suzuki , Masaaki Ishida , Atsufumi Omori , Kazuhiro Akatsu , Muneaki Iwata , Hayato Fujita
发明人： Seizo Suzuki , Masaaki Ishida , Atsufumi Omori , Kazuhiro Akatsu , Muneaki Iwata , Hayato Fujita
IPC分类号： G03G15/04
CPC分类号： G03G15/043 , G03G15/0189 , G03G15/5058
摘要： Apparatus that forms an image according to image information includes density sensors that detect image density variations in main and sub-scanning directions. A processing device generates correction data for correcting a light source output to suppress the density variations based on detection results. The processing device modifies the correction data such that the light source output after the correction is at least a minimum rated output at a position at which the output after the correction is lower than the minimum rated output, in the relation between a position on the surface of the photosensitive element in the main-scanning direction and the output after the correction, and modifies the correction data such that the light source output after the correction is at most a maximum rated output at a position at which the output after the correction is higher than the maximum rated output.
摘要翻译：根据图像信息形成图像的装置包括检测主扫描方向和副扫描方向上的图像浓度变化的密度传感器。处理装置产生用于校正光源输出的校正数据，以根据检测结果抑制密度变化。处理装置修正校正数据，使得校正后的光源输出在校正后的输出低于最小额定输出的位置处至少为最小额定输出，表面上的位置之间的关系的主扫描方向上的感光元件和校正后的输出，并且修正校正数据，使得校正后的光源输出在校正后的输出更高的位置处于最大额定输出超过最大额定输出。

14. 发明授权

US10324397B2 Image forming apparatus and image forming method 有权
公开(公告)号：US10324397B2
公开(公告)日：2019-06-18
申请号：US15203081
申请日：2016-07-06
申请人： Muneaki Iwata , Masaaki Ishida , Atsufumi Omori , Hayato Fujita , Takefumi Takizawa
发明人： Muneaki Iwata , Masaaki Ishida , Atsufumi Omori , Hayato Fujita , Takefumi Takizawa
IPC分类号： G03G15/00 , G03G15/043
摘要： An image forming apparatus includes a photoconductor drum, a latent-image forming device, a developing device, a density detecting device, and a processing device. The density detecting device is configured to detect densities at a plurality of positions in a main-scanning direction on a developed image. The processing device is configured to acquire at least two light-amount correction tables respectively associated with at least two positions of the plurality of positions in the main-scanning direction on the developed image, the light-amount correction tables being for reducing density variations in a sub-scanning direction at the at least two positions, and correct, for each scan, a set point for setting an amount of light of a light source based on a difference in corresponding correction data between two light-amount correction tables respectively associated with two adjacent positions of the at least two light-amount correction tables.

15. 发明授权

US08982422B2 Method and apparatus for forming images, and method for producing printed products 有权
标题翻译：用于形成图像的方法和装置以及用于制造印刷品的方法
公开(公告)号：US08982422B2
公开(公告)日：2015-03-17
申请号：US14269332
申请日：2014-05-05
申请人： Muneaki Iwata , Masaaki Ishida , Atsufumi Omori , Hayato Fujita
发明人： Muneaki Iwata , Masaaki Ishida , Atsufumi Omori , Hayato Fujita
IPC分类号： H04N1/407 , G03G15/04
CPC分类号： G03G15/04027 , H04N1/40037 , H04N1/4058 , H04N1/4092
摘要： An image forming apparatus for forming an image in accordance with light to be emitted from a light source includes: a digital half-toning unit configured to convert a uniform-pixel-value region of image data to a parallel-line pattern formed with a plurality of parallel lines extending obliquely with respect to a direction, in which pixels are arrayed, thereby expressing each gray level of the image data as an area percentage; a modulated-signal generating unit configured to generate a modulated signal by modulating the converted image data with a clock signal; a light-source driving unit configured to drive the light source according to the modulated signal; and an edge control unit configured to narrow a to-be-illuminated region, which is to be illuminated by the light from the light source, in each of edge neighborhoods of the lines constituting the parallel-line pattern, while increasing intensity of the light.
摘要翻译：根据从光源发出的光形成图像的图像形成装置包括：数字半色调单元，被配置为将图像数据的均匀像素值区域转换为形成有多个的平行线图案相对于其中排列像素的方向倾斜地延伸的平行线，从而将图像数据的每个灰度级表示为面积百分比; 调制信号生成单元，被配置为通过用时钟信号调制转换的图像数据来生成调制信号; 光源驱动单元，被配置为根据调制信号驱动光源; 以及边缘控制单元，被配置为在构成平行线图案的线的每个边缘邻域中缩小要被来自光源的光照明的被照明区域，同时增加光的强度。

16. 发明申请

US20140139605A1 LIGHT SOURCE DRIVE CIRCUIT, OPTICAL SCANNING APPARATUS, AND IMAGE FORMING APPARATUS 有权
标题翻译：光源驱动电路，光学扫描装置和图像形成装置
公开(公告)号：US20140139605A1
公开(公告)日：2014-05-22
申请号：US14082628
申请日：2013-11-18
申请人： Hayato Fujita , Masaaki ISHIDA , Atsufumi Omori , Muneaki Iwata
发明人： Hayato Fujita , Masaaki ISHIDA , Atsufumi Omori , Muneaki Iwata
IPC分类号： B41J2/385 , G02B26/08 , H01S3/00
CPC分类号： G03G15/04 , G02B26/127 , G03G15/04054 , G03G15/80 , H01S5/0428
摘要： A light source drive circuit for driving a light source is disclosed including a drive current generating unit generating a drive current, the drive current including a predetermined current for obtaining a predetermined light amount from the light source, a first auxiliary current input to the light source prior to input of the predetermined current, and a second auxiliary current added to the predetermined current in synchronization thereto; and a signal generating unit generating a first signal and a second signal, the first signal causing the first auxiliary current to be input for a first period and the second signal causing the second auxiliary current to be applied to the predetermined current for a second period. The first period is shorter than a period from a rise of the predetermined current to when a light amount from the light source reaches the predetermined light amount with the predetermined current.
摘要翻译：公开了一种用于驱动光源的光源驱动电路，其包括产生驱动电流的驱动电流产生单元，包括用于从光源获得预定光量的预定电流的驱动电流，输入到光源的第一辅助电流在输入预定电流之前，将与预定电流相加的第二辅助电流同步到其上; 以及信号产生单元，产生第一信号和第二信号，所述第一信号使得所述第一辅助电流输入第一周期，所述第二信号使所述第二辅助电流施加到所述预定电流第二周期。第一期间比预定电流上升到来自光源的光量以规定电流达到规定光量的期间短。

17. 发明授权

US08648892B2 Image forming apparatus to detect and correct density variations in a developed image 有权
标题翻译：用于检测和校正显影图像中的密度变化的图像形成装置
公开(公告)号：US08648892B2
公开(公告)日：2014-02-11
申请号：US13354789
申请日：2012-01-20
申请人： Seizo Suzuki , Masaaki Ishida , Atsufumi Omori , Kazuhiro Akatsu , Muneaki Iwata , Hayato Fujita
发明人： Seizo Suzuki , Masaaki Ishida , Atsufumi Omori , Kazuhiro Akatsu , Muneaki Iwata , Hayato Fujita
IPC分类号： B41J2/435 , G03G15/04
CPC分类号： G03G15/043 , G03G15/0189 , G03G15/5058
摘要： Apparatus that forms an image according to image information includes density sensors that detect image density variations in main and sub-scanning directions. A processing device generates correction data for correcting a light source output to suppress the density variations based on detection results. The processing device modifies the correction data such that the light source output after the correction is at least a minimum rated output at a position at which the output after the correction is lower than the minimum rated output, in the relation between a position on the surface of the photosensitive element in the main-scanning direction and the output after the correction, and modifies the correction data such that the light source output after the correction is at most a maximum rated output at a position at which the output after the correction is higher than the maximum rated output.
摘要翻译：根据图像信息形成图像的装置包括检测主扫描方向和副扫描方向上的图像浓度变化的密度传感器。处理装置产生用于校正光源输出的校正数据，以根据检测结果抑制密度变化。处理装置修正校正数据，使得校正后的光源输出在校正后的输出低于最小额定输出的位置处至少为最小额定输出，表面上的位置之间的关系的主扫描方向上的感光元件和校正后的输出，并且修正校正数据，使得校正后的光源输出在校正后的输出更高的位置处于最大额定输出超过最大额定输出。

18. 发明申请

US20130243459A1 IMAGE FORMING APPARATUS 有权
标题翻译：图像形成装置
公开(公告)号：US20130243459A1
公开(公告)日：2013-09-19
申请号：US13843147
申请日：2013-03-15
申请人： Atsufumi OMORI , Masaaki Ishida , Kazuhiro Akatsu , Muneaki Iwata , Hayato Fujita
发明人： Atsufumi OMORI , Masaaki Ishida , Kazuhiro Akatsu , Muneaki Iwata , Hayato Fujita
IPC分类号： G03G15/00
CPC分类号： G03G15/556 , G03G15/5058
摘要： An image forming apparatus is disclosed, including a light source; a drum; an optical scanning apparatus; and an endless belt. The image forming apparatus further includes a pattern forming unit which forms, on the endless belt along a conveying direction of the endless belt, a density fluctuation detecting pattern having a period; a density sensor which detects the density fluctuating detecting pattern and outputs a density signal including information on density fluctuations in the conveying direction of the endless belt; and a period detecting sensor which detects the period included in the density fluctuations.
摘要翻译：公开了一种图像形成装置，包括光源; 鼓光学扫描装置; 和无尽的皮带。图像形成装置还包括图案形成单元，其沿环形带的输送方向在环形带上形成具有周期的浓度波动检测图案; 密度传感器，其检测所述浓度波动检测图案，并输出密度信号，所述浓度信号包括关于环形带的传送方向上的密度波动的信息; 以及周期检测传感器，其检测包含在密度波动中的周期。

19. 发明授权

US10440227B2 Image processing device implements image processing method to perform thinning and smoothing process on image data converted from first resolution to second resolution 有权
公开(公告)号：US10440227B2
公开(公告)日：2019-10-08
申请号：US15581359
申请日：2017-04-28
申请人： Shigeru Uekusa , Hayato Fujita , Muneaki Iwata
发明人： Shigeru Uekusa , Hayato Fujita , Muneaki Iwata
IPC分类号： H04N1/409 , H04N1/40 , H04N1/393 , G06K15/02 , G06K9/44 , G06K15/12
摘要： An image processing device includes: a first matching circuit to determine whether an image matrix of image data of a first resolution matches a first pattern, and output a first determination result; a first converting circuit to, if the image matrix matches the first pattern, replace a target pixel of the image matrix with a first pixel pattern of a second resolution, and output first image data of the second resolution; a second converting circuit to convert the image data of the first resolution into image data of the second resolution, and output second image data of the second resolution; a detecting circuit to detect whether the target pixel is included in a fine line structure, and output a detection result; and a selecting circuit to output one of the first image data and the second image data based on the first determination result and the detection result.

20. 发明授权

US09659243B2 Image forming apparatus and method for driving light source 有权
公开(公告)号：US09659243B2
公开(公告)日：2017-05-23
申请号：US15048240
申请日：2016-02-19
申请人： Hayato Fujita , Masaaki Ishida , Atsufumi Omori , Muneaki Iwata
发明人： Hayato Fujita , Masaaki Ishida , Atsufumi Omori , Muneaki Iwata
IPC分类号： G06K15/02 , H04N1/00
CPC分类号： G06K15/1873 , G06K2215/0057 , H04N1/00 , H04N1/00822 , H04N1/0402 , H04N1/2361 , H04N2201/0458 , H04N2201/3252
摘要： An image forming apparatus includes: an image processor configured to perform first image processing on image data having a first resolution and to add tag data to a target pixel where second image processing is to be performed; a resolution converter configured to convert the image data into image data having a second resolution higher than the first resolution, and to perform the second image processing based on arrangement of the image data having the first resolution and the tag data; a pulse generator configured to generate an on-off modulation signal and an application-current switching signal in accordance with the image data having undergone the second image processing; and a light source driver configured to drive the light source in accordance with a current setting value output from an application current setter depending on the application-current switching signal and the on-off modulation signal.

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