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21. 发明公开

US20230280672A1 IMAGE FORMING APPARATUS, CONTROL METHOD THEREOF, AND STORAGE MEDIUM 审中-公开
公开(公告)号：US20230280672A1
公开(公告)日：2023-09-07
申请号：US18116360
申请日：2023-03-02
申请人： CANON KABUSHIKI KAISHA
发明人： MASASHI OYA
IPC分类号： G03G15/043 , G06F3/12
CPC分类号： G03G15/043 , G06F3/1254 , G06F3/1208
摘要： Image data that is obtained by performing halftone processing for printing-target image data is obtained, a plurality of pieces of correction information corresponding to types of cause of variations of light amount for correcting the variations of light amount on a photosensitive body by light radiated from a plurality of light-emitting elements is generated, and the image data for which halftone processing has been performed is corrected by using the correction information, but the printing-target image data is not corrected.

22. 发明公开

US20230269340A1 IMAGE FORMING APPARATUS CONFIGURED TO PERFORM HALFTONE PROCESSING 审中-公开
公开(公告)号：US20230269340A1
公开(公告)日：2023-08-24
申请号：US18159142
申请日：2023-01-25
申请人： CANON KABUSHIKI KAISHA
发明人： GO ARAKI , MITSUHIRO OBARA
IPC分类号： H04N1/405 , H04N1/52 , H04N1/29 , G03G15/043
CPC分类号： H04N1/4052 , G03G15/043 , H04N1/295 , H04N1/52 , H04N1/1933
摘要： An image forming apparatus includes: a scanning unit configured to form an electrostatic latent image on a photoconductor by scanning the photoconductor with one or more scanning beams in a main scanning direction based on an image signal, repetitively in a sub-scanning direction perpendicular to the main scanning direction; a generating unit configured to perform halftone processing on image data to generate the image signal; and a storage unit configured to store correction information. The correction information is set such that start positions of a plurality of scanning lines are linearly displaced to either a negative side or a positive side of the main scanning direction along the sub-scanning direction, in accordance with a direction of a first vector forming a smaller angle with the sub-scanning direction among two vectors in the halftone processing.

23. 发明公开

US20230236523A1 OPTICAL SCANNING APPARATUS AND ELECTRONIC IMAGE-FORMING APPARATUS 审中-公开
公开(公告)号：US20230236523A1
公开(公告)日：2023-07-27
申请号：US18187656
申请日：2023-03-21
申请人： Zhuhai Pantum Electronics Co., Ltd.
发明人： Yongchao NIE , Chao WANG
IPC分类号： G03G15/043 , G02B26/10 , G02B26/12
CPC分类号： G03G15/043 , G02B26/101 , G02B26/124
摘要： The present disclosure provides an optical scanning apparatus and an electronic image-forming apparatus. The optical scanning apparatus includes a light source; a first optical unit; an optical deflector, configured to deflect the light beam emitted from the first optical unit; and a second optical unit, configured to guide the light beam deflected by the optical deflector on a scanned target surface for forming an image. An image height on the scanned target surface satisfies an expression: Y=fc×tan(B×θ), where Y denotes the image height on the scanned target surface, fc denotes an image-forming characteristic coefficient of the second optical unit, B denotes a scanning coefficient of the second optical unit, θ denotes an effective scanning angle of the optical scanning apparatus, and all region or a partial region in effective scanning range of the second optical unit satisfies a condition: 0.7≤B≤0.9.

24. 发明授权

US11669023B2 Light emitting device, optical measurement apparatus, and image forming apparatus 有权
公开(公告)号：US11669023B2
公开(公告)日：2023-06-06
申请号：US17547225
申请日：2021-12-10
申请人： FUJIFILM Business Innovation Corp.
发明人： Kento Nakamura , Yosuke Kasuya , Nobutaka Hara
IPC分类号： G03G15/00 , G03G15/04 , G03G15/043
CPC分类号： G03G15/04036 , G03G15/043 , G03G15/5045
摘要： A light emitting device includes: a member having a first surface facing in one direction and a second surface facing an opposite side to the first surface; a light emitter that is disposed at the first surface, generates heat due to light emission, and has a lower stiffness than the member; and a heater that is disposed at the second surface of the member, and heats the member from the second surface.

25. 发明授权

US11652946B2 Optical scanning device and image forming apparatus 有权
公开(公告)号：US11652946B2
公开(公告)日：2023-05-16
申请号：US17377011
申请日：2021-07-15
申请人： KYOCERA Document Solutions Inc.
发明人： Takayuki Mashimo
IPC分类号： H04N1/028 , G03G15/043 , G02B26/12 , H04N1/024
CPC分类号： H04N1/0283 , G02B26/122 , G03G15/043 , H04N1/024 , H04N1/02895
摘要： An optical scanning device includes a light source, a deflector, a random number generator, a selection part, a random number assignment part and an exposure control part. The light source includes a plurality of light emitting parts arranged in a predetermined direction at fixed intervals in a sub-scanning direction. The random number assignment part is configured to assign a random number sequence to each light emitting part constituting a set of target light emitting parts as an index for specifying a timing at which a light emitting time of the set of target light emitting parts is set to a correction value different from a reference value and to update the assignment of the random number sequence at a random number update period. The random number update period coincides with a scanning period of each light emitting part constituting the set of target light emitting parts.

26. 发明申请

US20230127750A1 IMAGE FORMING APPARATUS 有权
公开(公告)号：US20230127750A1
公开(公告)日：2023-04-27
申请号：US18047710
申请日：2022-10-19
申请人： Tomohide Takenaka
发明人： Tomohide Takenaka
IPC分类号： G03G15/043
摘要： An image forming apparatus includes a latent image bearer, an exposure device, a detector, and processing circuitry. The exposure device exposes the latent image bearer to form a latent image based on image data. The detector detects density unevenness, in a main scanning direction, of a toner image obtained by developing the latent image. The processing circuitry corrects an exposure amount of the exposure device and the image data based on the density unevenness in the main scanning direction detected by the detector.

27. 发明申请

US20230127187A1 IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND STORAGE MEDIUM 有权
公开(公告)号：US20230127187A1
公开(公告)日：2023-04-27
申请号：US17965774
申请日：2022-10-14
申请人： Katsuhiko Maeda
发明人： Katsuhiko Maeda
IPC分类号： G03G15/00 , G03G15/04 , G03G15/043
摘要： An image forming apparatus includes a plurality of image bearers, a plurality of optical writing devices, a plurality of image forming units, and circuitry. The plurality of optical writing devices scan and irradiate the plurality of image bearers with a plurality of light beams according to image data to form latent images on the plurality of image bearers. The plurality of image forming units develop the latent images formed on the plurality of image bearers. The circuitry changes scanning speeds of the plurality of light beams and sets, to each of the plurality of optical writing devices, a correction value of an image misregistration on corresponding one of the plurality of image bearers caused by a change of a scanning speed of corresponding one of the plurality of light beams.

28. 发明授权

US11635721B2 Method for determining type of sheet by imaging sheet 有权
公开(公告)号：US11635721B2
公开(公告)日：2023-04-25
申请号：US17568748
申请日：2022-01-05
申请人： CANON KABUSHIKI KAISHA
发明人： Masafumi Monde , Mizuki Ishimoto , Yu Miyajima , Norio Matsui
IPC分类号： G01N21/55 , G03G15/00 , H05B47/115 , G03G15/04 , G02B17/08 , G03G15/043
摘要： A first light guide guides first light in a first light guiding path. The first light is of light irradiated from the light source to a sheet. A first detection unit receives reflected light from the sheet and outputs an image signal indicating an image of a surface of the sheet. A second light guide guides second light in a second light guiding path different from the first light guiding path. The second light is of the light irradiated from the light source and is different from the first light. A second detection unit receives the second light and output a detection signal corresponding to a light amount of the second light. A control unit controls a light emission amount of the light source based on the detection signal.

29. 发明申请

US20230067966A1 IMAGE FORMING APPARATUS 有权
公开(公告)号：US20230067966A1
公开(公告)日：2023-03-02
申请号：US17590343
申请日：2022-02-01
申请人： FUJIFILM Business Innovation Corp.
发明人： Kenta Tonosu , Yosuke Kasuya , Takahiko Kobayashi
IPC分类号： G03G15/043 , G03G21/16
摘要： An image forming apparatus includes: a rotatable image carrier on an outer circumferential surface of which an image is to be formed and that is movable in a rotation axis direction between an image forming position and a maintenance position; a light-emitting unit including a base member extending in the rotation axis direction of the image carrier, and plural light-emitting devices provided on the base member and configured to apply light to the outer circumferential surface of the image carrier, the light-emitting unit being configured to move together with the image carrier in the rotation axis direction; and a supporting unit configured to move together with the image carrier in the rotation axis direction and to support the light-emitting unit when the image carrier and the light-emitting unit are at the maintenance position and the light-emitting unit is disabled from being positioned with respect to the image carrier.

30. 发明授权

US11592759B2 Image forming apparatus 有权
公开(公告)号：US11592759B2
公开(公告)日：2023-02-28
申请号：US17399296
申请日：2021-08-11
申请人： CANON KABUSHIKI KAISHA
发明人： Hidefumi Yoshida
IPC分类号： G03G15/043
摘要： An image forming apparatus includes a photosensitive drum which is rotatable; light-emitting portions arranged along a direction of a rotational axis of the photosensitive drum, the light-emitting portions emitting light based on image data in order to expose the photosensitive drum; a reference clock signal generation portion which generates a reference clock signal with a predetermined period; a modulated clock signal generation portion which generates a modulated clock signal with a predetermined modulation period by spreading a spectrum of the reference clock signal and by modulating the predetermined period, wherein the light-emitting portions emit light for a lighting time set based on the modulated clock signal; and a control signal generation portion which generates with a period of n times the predetermined modulation period (n is an integer greater than or equal to 1) a control signal for controlling a timing at which the light-emitting portions emit light.

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