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1. 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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 发明授权

US11592663B2 Light detecting apparatus and light scanning apparatus 有权
公开(公告)号：US11592663B2
公开(公告)日：2023-02-28
申请号：US17487454
申请日：2021-09-28
申请人： CANON KABUSHIKI KAISHA
发明人： Masayasu Teramura
IPC分类号： G03G15/043 , G02B26/12 , G02B26/08 , G02B5/122 , G02B26/10
摘要： An apparatus includes a reflecting element with first, second and third reflecting surfaces, and a receiving element configured to receive a light flux from a light source reflected by the reflecting element. A value of an inner product of a unit normal vector of the first reflecting surface and a unit normal vector of the second reflecting surface, a value of an inner product of the unit normal vector of the first reflecting surface and a unit normal vector of the third reflecting surface, and a value of an inner product of the unit normal vector of the second reflecting surface and the unit normal vector of the third reflecting surface are appropriately set.

7. 发明申请

US20230051298A1 IMAGE FORMING APPARATUS CAPABLE OF DETECTING DEVIATION BETWEEN EXPOSURE DEVICE AND PHOTOCONDUCTOR DRUM 有权
公开(公告)号：US20230051298A1
公开(公告)日：2023-02-16
申请号：US17884421
申请日：2022-08-09
申请人： KYOCERA Document Solutions Inc.
发明人： Masaru Watanabe , Kanako Kikuchi , Yasuaki Sakamoto , Ayato Morikami , Yuki Nakaiwa , Keisuke Oba , Koji Uno , Takuji Watanabe
IPC分类号： G03G15/043
摘要： An image forming apparatus includes a developing current detecting portion, a control portion, and a deviation detecting portion. The developing current detecting portion detects a developing current that flows between a developing device and a photoconductor drum during development of an electrostatic latent image. The control portion causes the exposure device to form electrostatic latent images of at least two patch images at different positions from each other and at different timings from each other in a main scanning direction. The deviation detecting portion detects deviation of one of the exposure device and the photoconductor drum with respect to the other based on a detection timing at which the developing current is detected during development of the electrostatic latent images of the at least two patch images.

8. 发明申请

US20230015377A1 IMAGE FORMING APPARATUS 有权
公开(公告)号：US20230015377A1
公开(公告)日：2023-01-19
申请号：US17848335
申请日：2022-06-23
申请人： CANON KABUSHIKI KAISHA
发明人： Shingo Ito , Masashi Tanaka
IPC分类号： G03G15/043 , G03G15/04 , G02B26/12
摘要： An image forming apparatus includes an exposure unit that reflects a laser beam emitted from a light source by a polygon mirror having a plurality of reflection surfaces to form a latent image on a photosensitive member, and a control unit that controls the image forming apparatus in a plurality of operation modes including a normal mode and a low speed mode having a slower process speed than the normal mode. The control unit controls the polygon mirror to use all of the plurality of reflection surfaces to reflect the laser beam when in the normal mode. When in the low speed mode, the control unit makes the process speed faster than 0.5 times that of the normal mode, rotates the polygon mirror faster than in the normal mode, and controls the polygon mirror to use only some of the plurality of reflection surfaces to reflect the laser beam.

9. 发明授权

US11550147B2 Optical scanning device, image forming apparatus including optical scanning device, and optical scanning method 有权
公开(公告)号：US11550147B2
公开(公告)日：2023-01-10
申请号：US17550599
申请日：2021-12-14
申请人： SHARP KABUSHIKI KAISHA
发明人： Hiroshi Yamamoto , Takaharu Motoyama
IPC分类号： G03G15/043 , G02B26/12 , G03G15/04 , G02B26/08
摘要： An optical scanning device according to the present invention has a 2-beam type first laser diode and a 1-beam type second laser diode. When resolution in a sub-scanning direction is 600 dpi, exposure processing is executed by a first laser beam and a second laser beam emitted from the first laser diode. And when the resolution in the sub-scanning direction is 1200 dpi, the exposure processing is executed by the first laser beam and a third laser beam emitted from the second laser diode.

10. 发明申请

US20230004100A1 LIGHT-EMITTING DEVICE 有权
公开(公告)号：US20230004100A1
公开(公告)日：2023-01-05
申请号：US17939478
申请日：2022-09-07
申请人： FUJIFILM Business Innovation Corp.
发明人： Takahiko KOBAYASHI , Yosuke KASUYA
IPC分类号： G03G15/043
摘要： A light-emitting device includes: a first light-emitting unit that extends in one direction and that has a first emission surface that emits light located along the one direction; a second light-emitting unit that is located in the one direction with respect to the first light-emitting unit, that extends in the one direction, and that has a second emission surface that emits light located along the one direction; a cleaning unit that is capable of moving in the one direction and an opposite direction that is opposite to the one direction to clean the first emission surface; a transmission part that extends from the cleaning unit in the one direction and that transmits a moving force for moving the cleaning unit to the cleaning unit; and an extending part that extends from the transmission part in the one direction to elongate the transmission part. When the cleaning unit is positioned furthest in the opposite direction, an end of the extending part in the one direction is located further in the one direction than a midpoint between an end of the first light-emitting unit in the one direction and an end of the second light-emitting unit in the one direction.

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