公开(公告)号：US09958804B2

公开(公告)日：2018-05-01

申请号：US15352276

申请日：2016-11-15

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yuu Matsuda ,  Go Araki

IPC: G03G15/043

CPC classification number: G03G15/043

Abstract: An image forming apparatus includes an identifying unit configured to identify on basis of image data, a pixel to be corrected from a plurality of pixels of an image to be formed from the image data, a holding unit configured to hold a plurality of correction information pieces describing correction amounts for exposure amounts, and a correcting unit configured to select a correction information piece from the plurality of correction information pieces on basis of distances between one of the pixels to be corrected and a plurality of edges of the image formed from the image data and to correct an exposure amount to be applied by an exposing unit to the pixel to be corrected on basis of the selected correction information piece from an exposure amount corresponding to the image data.

公开(公告)号：US20170315465A1

公开(公告)日：2017-11-02

申请号：US15489450

申请日：2017-04-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Go Araki ,  Hiroyuki Yamazaki ,  Takaomi Uezono ,  Hidenori Kanazawa

IPC: G03G15/043 ,  H04N1/21 ,  H04N1/12

CPC classification number: G03G15/043 ,  H04N1/1215 ,  H04N1/2166 ,  H04N1/38

Abstract: An image forming apparatus includes: a photosensitive member; an exposure unit configured to divide one pixel into a plurality of pixel pieces and perform exposure on a pixel piece-by-pixel piece basis, to form an electrostatic latent image on the photosensitive member; a determination unit configured to determine, based on image data, an isolated pixel surrounded by blank pixels in the electrostatic latent image; a selection unit configured to select a correction target pixel from the blank pixels surrounding the isolated pixel; and a correction unit configured to correct the image data so as to expose a pixel piece of the correction target pixel.

公开(公告)号：US20160370727A1

公开(公告)日：2016-12-22

申请号：US15169402

申请日：2016-05-31

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yuki Nakajima ,  Go Araki ,  Hidenori Kanazawa

IPC: B41J2/385

CPC classification number: G03G15/043 ,  G03G21/14

Abstract: There is provided an image forming apparatus comprising: a scanning unit configured to scan, in accordance with image signals, a photosensitive member with laser light in a main scanning direction at a scanning speed that is not constant; an image signal generation unit configured to generate image signals that are changed such that the faster the scanning speed is, the narrower an image signal width becomes; a clock signal generation unit configured to generate sampling clock signals for sampling the image signals whose image signal width is changed such that the faster the scanning speed is, the shorter a sampling interval becomes; and a count unit configured to count image signals whose image signal width is changed based on the sampling clock signals.

Abstract translation: 提供了一种图像形成装置，包括：扫描单元，被配置成以不恒定的扫描速度，按照图像信号扫描主扫描方向上的激光的感光构件; 图像信号生成单元，被配置为生成图像信号变化，使得扫描速度越快，图像信号宽度越窄; 时钟信号生成单元，被配置为生成采样时钟信号，用于对图像信号的宽度进行改变以使扫描速度越快，采样间隔越短; 以及计数单元，被配置为基于采样时钟信号对图像信号宽度进行改变的图像信号进行计数。

公开(公告)号：US09417579B2

公开(公告)日：2016-08-16

申请号：US15015540

申请日：2016-02-04

Applicant: CANON KABUSHIKI KAISHA

Inventor： Go Araki ,  Norihito Naito

IPC: G03G15/04 ,  G03G15/043 ,  G03G15/00

CPC classification number: G03G15/043 ,  G03G15/50 ,  G03G2215/0431

Abstract: When an edge effect or sweeping occurs in a developing material, pixels, among a plurality of pixels that configure image data, will arise in which a developing material consumption amount rises beyond an original consumption amount. A CPU corrects the developing material consumption amount for the pixels, among the plurality of pixels that configure the image data, in which the developing material consumption amount will rise beyond the original consumption amount.

Abstract translation: 当在显影材料中发生边缘效应或扫描时，将出现在显影材料消耗量超过原始消耗量的情况下，构成图像数据的多个像素之中的像素。 在显影材料消耗量将超过原始消耗量的情况下，CPU校正构成图像数据的多个像素中的像素的显影材料消耗量。

公开(公告)号：US20220252998A1

公开(公告)日：2022-08-11

申请号：US17592247

申请日：2022-02-03

Applicant: CANON KABUSHIKI KAISHA

Inventor： Go Araki

IPC: G03G15/043

Abstract: An image forming apparatus includes: a storage unit configured to store pattern information and a generation unit configured to generate a drive signal for driving an exposure unit. The pattern information indicates a plurality of exposure patterns for a first pixel, the plurality of exposure patterns are selected such that whether exposure patterns that are identical to each other among the plurality of exposure patterns are adjacent to each other, or two exposure patterns that are different from each other among the plurality of exposure patterns are adjacent to each other in the main scanning direction, the non-exposure regions are not consecutively present between the two exposure patterns, and in a case where the plurality of exposure patterns are consecutively used in the main scanning direction, the generation unit randomly selects an exposure pattern to be used.

公开(公告)号：US10990053B2

公开(公告)日：2021-04-27

申请号：US16884165

申请日：2020-05-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Go Araki ,  Yoshihiro Mitsui

IPC: G03G15/00 ,  G03G15/043 ,  G03G21/18

Abstract: An image forming apparatus includes a storage unit configured to store correction data; an identifying unit configured to identify a correction amount for a correction target pixel based on the correction data stored in the storage unit; a correction unit configured to correct an exposure amount of the correction target pixel among a plurality of pixels indicated by image data, from an exposure amount indicated by the image data, based on the correction amount for the correction target pixel; and an image forming unit configured to form an image based on an exposure amount after correction by the correction unit. The correction data includes only a correction amount corresponding to each of representative parameter values of a plurality of parameter values of a parameter for varying the correction amount.

公开(公告)号：US10073370B2

公开(公告)日：2018-09-11

申请号：US15352882

申请日：2016-11-16

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yoichi Takikawa ,  Ryosuke Otani ,  Hidenori Kanazawa ,  Go Araki ,  Hisashi Ishikawa

IPC: H04N1/60 ,  G06F15/00 ,  G06K1/00 ,  G03G15/043

CPC classification number: G03G15/043

Abstract: The present invention performs inplane uneven density correction that suppresses a number of tone correction properties and has few correction residuals. Accordingly, a correction unit corrects pixel data D based on a plurality of tone correction properties respectively corresponding to a plurality of spot diameters of a light to expose on a surface of a photoreceptor, and to generate a plurality of pieces of correction data D1 and D2. A setting unit sets a ratio Rb based on a spot diameter on the photoreceptor of a pixel corresponding to the pixel data D. A blending unit generates tone correction data Dc by blending the plurality of pieces of correction data D1 and D2 based on the ratio Rb.

公开(公告)号：US09507289B2

公开(公告)日：2016-11-29

申请号：US15171250

申请日：2016-06-02

Applicant: CANON KABUSHIKI KAISHA

Inventor： Go Araki ,  Hidenori Kanazawa

IPC: G03G15/043

CPC classification number: G03G15/043 ,  H04N1/508

Abstract: An image forming apparatus includes: specifying unit configured to specify, based on image data, a pixel to be subjected to correction from among pixels of an image to be formed from the image data; and a correction unit configured to correct an exposure amount of an exposure unit for the pixel to be subjected to correction from an exposure amount indicated by the image data. The correction unit is further configured to correct the exposure amount applied by the exposure unit to the pixel to be subjected to correction by not exposing at least a portion of a region of the pixel to be subjected to correction according to the a distance between the pixel to be subjected to correction and an edge of the image to be formed from the image data.

Abstract translation: 图像形成装置包括：指定单元，被配置为基于图像数据从要从图像数据形成的图像的像素中指定要进行校正的像素; 以及校正单元，被配置为从由图像数据指示的曝光量校正要进行校正的像素的曝光单元的曝光量。 校正单元还被配置为通过根据像素之间的距离不曝光要进行校正的像素的区域的至少一部分来将曝光单元施加的曝光量校正为要进行校正的像素 要进行校正和由图像数据形成的图像的边缘。

公开(公告)号：US09395644B2

公开(公告)日：2016-07-19

申请号：US14885071

申请日：2015-10-16

Applicant: CANON KABUSHIKI KAISHA

Inventor： Go Araki ,  Hidenori Kanazawa

IPC: G03G15/04 ,  G03G15/043

CPC classification number: G03G15/043 ,  H04N1/508

Abstract: An image forming apparatus includes: specifying unit configured to specify, based on image data, a pixel to be subjected to correction from among pixels of an image to be formed from the image data; and a correction unit configured to correct an exposure amount of an exposure unit for the pixel to be subjected to correction from an exposure amount indicated by the image data. The correction unit is further configured to correct the exposure amount applied by the exposure unit to the pixel to be subjected to correction by not exposing at least a portion of a region of the pixel to be subjected to correction according to the distance between the pixel to be subjected to correction and an edge of the image to be formed from the image data.

Abstract translation: 图像形成装置包括：指定单元，被配置为基于图像数据从要从图像数据形成的图像的像素中指定要进行校正的像素; 以及校正单元，被配置为从由图像数据指示的曝光量校正要进行校正的像素的曝光单元的曝光量。 校正单元还被配置为通过根据像素之间的距离而不曝光要进行校正的像素的区域的至少一部分来将曝光单元施加的曝光量校正为要进行校正的像素 对图像数据进行校正和图像边缘。

公开(公告)号：US09215346B2

公开(公告)日：2015-12-15

申请号：US13888494

申请日：2013-05-07

Applicant: CANON KABUSHIKI KAISHA

Inventor： Hikaru Uchidate ,  Yuji Takayama ,  Tomoyuki Saiki ,  Go Araki ,  Kazuo Ogata ,  Hiroko Katsuyama ,  Ichiro Yasumaru

IPC: G09C3/00 ,  G06F15/00 ,  H04N1/40 ,  H04N1/44 ,  H04N1/00

CPC classification number: H04N1/40093 ,  H04N1/00864

Abstract: The image forming apparatus reads an original conveyed in the image forming apparatus, analyzes a feature value of information about an original image on the read original, generates an image to overwrite the original image with, using image data having the feature value obtained based on an analysis result, sets a predetermined area on the original image, and overwrites the predetermined area on the original image with the generated image.

Abstract translation: 图像形成装置读取在图像形成装置中传送的原稿，对读取的原稿上的原始图像的信息的特征值进行分析，生成图像以覆盖原始图像，使用具有基于 分析结果，在原始图像上设置预定区域，并用生成的图像覆盖原始图像上的预定区域。