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1. 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.

2. 发明授权

US09961227B2 Light source drive control device, image forming apparatus, light source drive control method, and computer program product 有权
公开(公告)号：US09961227B2
公开(公告)日：2018-05-01
申请号：US15015364
申请日：2016-02-04
申请人： Atsufumi Omori , Masaaki Ishida , Muneaki Iwata , Hayato Fujita
发明人： Atsufumi Omori , Masaaki Ishida , Muneaki Iwata , Hayato Fujita
IPC分类号： G06F15/00 , H04N1/04 , H04N1/00 , H04N1/409 , H04N1/40
CPC分类号： H04N1/0446 , H04N1/00822 , H04N1/0408 , H04N1/40037 , H04N1/40068 , H04N1/4092
摘要： A light source drive control device includes: an image data generating part that generates line-thinned image data having been subjected to line thinning processing for thinning an edge pixel in image data by a first pixel width; an intensity information generating part that generates intensity information including a first intensity at which a pixel not included in a set second pixel width of an edge in the line-thinned image data is exposed and a second intensity at which a pixel included in the second pixel width is exposed and which is higher than the first intensity; and a light source driving part that drives a light source based on a light source modulation signal generated according to the line-thinned image data and a drive current data switched based on a drive current switching signal generated based on the intensity information.

3. 发明授权

US09466016B2 Image forming apparatus which forms image data indicating whether a pixel is for a character or line 有权
标题翻译：图像形成装置，其形成指示像素是针对字符还是线的图像数据
公开(公告)号：US09466016B2
公开(公告)日：2016-10-11
申请号：US14796385
申请日：2015-07-10
申请人： Muneaki Iwata , Masaaki Ishida , Atsufumi Omori , Naoto Watanabe , Hayato Fujita
发明人： Muneaki Iwata , Masaaki Ishida , Atsufumi Omori , Naoto Watanabe , Hayato Fujita
IPC分类号： G06F15/00 , G06K1/00 , G06K15/02 , G06K15/14 , G06F3/12 , G06K15/00
CPC分类号： G06K15/1874 , G06F3/1208 , G06F3/122 , G06K15/14 , G06K15/1822 , G06K15/4055 , H04N1/40062 , H04N1/40068
摘要： An apparatus includes an image-processing-unit that generates tag information indicating whether each of pixels of a first-resolution image data is a pixel of a character or a line, a resolution-converting-unit that converts the first-resolution image data to image data with a second resolution higher than the first resolution, and a light-source-driving-unit that drives light-source according to the second-resolution image data. The resolution-converting-unit includes an image-matrix-acquiring-unit that acquires an image matrix being image data and tag information with the first resolution in an area containing a target-pixel and pixels around the target-pixel, a pattern-matching-unit that determines whether the target-pixel is a pixel of an edge of a character or a line based on the image matrix, and a first-converting-unit that, when the pixel is the edge pixel, converts the image data to image data with the second resolution of a pattern determined in accordance with a layout of the target-pixel.
摘要翻译：一种装置，包括：图像处理单元，生成指示第一分辨率图像数据的每个像素是字符或行的像素的标签信息;将第一分辨率图像数据转换为具有比第一分辨率高的第二分辨率的图像数据，以及根据第二分辨率图像数据驱动光源的光源驱动单元。分辨率转换单元包括图像矩阵获取单元，其在包含目标像素和目标像素周围的像素的区域中获取作为图像数据的图像矩阵和具有第一分辨率的标签信息，模式匹配 - 基于图像矩阵确定目标像素是字符边缘还是直线的像素的单位，以及当像素为边缘像素时，将图像数据转换为图像的第一转换单元具有根据目标像素的布局确定的图案的第二分辨率的数据。

4. 发明授权

US09298122B2 Image forming apparatus, image forming method, and method of producing printed material for generating a parallel line pattern of uniform concentration 有权
标题翻译：图像形成装置，图像形成方法以及用于产生均匀浓度的平行线图案的印刷材料的制造方法
公开(公告)号：US09298122B2
公开(公告)日：2016-03-29
申请号：US14268463
申请日：2014-05-02
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： G06K15/00 , H04N1/40 , G03G15/043 , H04N1/405 , H04N1/409 , G03G15/04
CPC分类号： G03G15/043 , G03G15/04027 , H04N1/40068 , H04N1/4058 , H04N1/4092
摘要： An image forming apparatus includes: a pseudo-halftone processing unit that processes input image data to output image data of first resolution; a resolution converting unit that converts the image data of the first resolution into image data of second resolution that is higher than the first resolution; a modulation-signal generating unit that generates a modulation signal obtained by modulating the image data of the second resolution according to a clock signal; and a light-source driving unit that drives a light source according to the modulation signal. The pseudo-halftone processing unit converts a region of pixels having the same pixel value into a parallel line pattern that is formed with a plurality of parallel lines oblique relative to a direction of arrangement of pixels. The resolution converting unit generates the image data o in which each edge of the lines forming the parallel line pattern is smoothed.
摘要翻译：一种图像形成装置包括：伪半色调处理单元，其处理输入图像数据以输出第一分辨率的图像数据; 分辨率转换单元，其将第一分辨率的图像数据转换成高于第一分辨率的第二分辨率的图像数据; 调制信号生成单元，其生成通过根据时钟信号调制所述第二分辨率的图像数据而获得的调制信号; 以及根据调制信号驱动光源的光源驱动单元。伪半色调处理单元将具有相同像素值的像素的区域转换为平行线图案，该平行线图案形成有相对于像素排列方向倾斜的多条平行线。分辨率转换单元生成图像数据o，其中形成平行线图案的线的每个边缘被平滑化。

5. 发明授权

US08957934B2 Light source drive circuit, optical scanning apparatus, semiconductor drive circuit, and image forming apparatus 有权
标题翻译：光源驱动电路，光扫描装置，半导体驱动电路和图像形成装置
公开(公告)号：US08957934B2
公开(公告)日：2015-02-17
申请号：US14072946
申请日：2013-11-06
申请人： Hayato Fujita , Atsufumi Omori , Muneaki Iwata , Masaaki Ishida
发明人： Hayato Fujita , Atsufumi Omori , Muneaki Iwata , Masaaki Ishida
IPC分类号： B41J2/435 , B41J2/47 , H01S5/06 , H05B37/02 , H01S5/042 , G06K15/12 , H01S5/068
CPC分类号： H01S5/0425 , B41J2/435 , B41J2/455 , B41J2/471 , G06K15/1209 , H01S5/0261 , H01S5/0427 , H01S5/06 , H01S5/068 , H01S5/183 , H05B37/02 , Y02B20/202
摘要： A light source drive circuit which drives a light source is disclosed, including a drive current generating unit which generates a drive current, the driving current including a predetermined current for obtaining a predetermined light amount from the light source; and first and second overshoot currents which are applied to the predetermined current in synchronization thereto; and a control unit which sets, to the drive current generating unit, a value of the first overshoot current to a fixed value, and a value of the second overshoot current in accordance with a light amount output from the light source.
摘要翻译：公开了一种驱动光源的光源驱动电路，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; 以及与其同步地施加到预定电流的第一和第二过冲电流; 以及控制单元，其根据从光源输出的光量将驱动电流产生单元的第一过冲电流的值设定为固定值，以及第二过冲电流的值。

6. 发明授权

US08928715B2 Light source driver, light source-driving method, image-forming apparatus, light source-driving circuit, and optical scanner 有权
标题翻译：光源驱动器，光源驱动方法，图像形成装置，光源驱动电路和光学扫描器
公开(公告)号：US08928715B2
公开(公告)日：2015-01-06
申请号：US14140147
申请日：2013-12-24
申请人： Atsufumi Omori , Masaaki Ishida , Muneaki Iwata , Hayato Fujita
发明人： Atsufumi Omori , Masaaki Ishida , Muneaki Iwata , Hayato Fujita
IPC分类号： B41J2/47 , B41J2/385 , B41J2/435 , H05B37/02 , G02B26/10 , G03G15/04
CPC分类号： H05B37/0281 , G03G15/04036 , G03G15/04072 , G03G2215/0132 , H05B33/0803
摘要： A light source driver includes a controller which outputs an undershoot current in synchronization with lighting complete timing in lighting information, wherein the controller is configured to output the undershoot current such that a voltage in a light source when the output of the undershoot current is complete is equal to a voltage in the light source before being turned on.
摘要翻译：光源驱动器包括控制器，其与照明信息中的点亮完成定时同步地输出下冲电流，其中，所述控制器被配置为输出下冲电流，使得当下冲电流的输出完成时光源中的电压为在开启前等于光源中的电压。

7. 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.

8. 发明授权

US09527303B2 Image forming apparatus and image forming method to form an image by scanning an image bearer with light modulated based on image information 有权
标题翻译：图像形成装置和图像形成方法，用于通过基于图像信息调制的光扫描图像载体来形成图像
公开(公告)号：US09527303B2
公开(公告)日：2016-12-27
申请号：US14585383
申请日：2014-12-30
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： B41J2/47
CPC分类号： B41J2/471 , B41J2/47 , B41J2/473
摘要： An image forming apparatus includes a drive signal generating unit that generates a drive signal for driving a light source based on a reference pulse signal serving as a reference to form a plurality of pixels arranged in the main-scanning direction of an image, and the drive signal generating unit generates the drive signal by adjusting the pulse width of the reference pulse signal so that the amplitude of portions of the reference pulse signal with the adjusted pulse width corresponding to specific pixels among the pixels is larger than the amplitude of portions corresponding to normal pixels that are pixels other than the specific pixels among the pixels, and so that the pulse width of the portions of the reference pulse signal with the adjusted pulse width corresponding to the specific pixels is smaller than the pulse width of the portions corresponding to the normal pixels.
摘要翻译：一种图像形成装置，包括：驱动信号生成单元，其基于用作基准的基准脉冲信号生成用于驱动光源的驱动信号，以形成沿图像的主扫描方向布置的多个像素;驱动信号生成单元，信号产生单元通过调整参考脉冲信号的脉冲宽度来产生驱动信号，使得具有与像素中的特定像素对应的调整脉冲宽度的参考脉冲信号的部分的幅度大于对应于正常的部分的振幅像素之间的像素除了像素之间的特定像素之外的像素，并且具有对应于特定像素的调整脉冲宽度的参考脉冲信号的部分的脉冲宽度小于对应于正常的部分的脉冲宽度像素。

9. 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。

10. 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。

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