公开(公告)号：US20170146923A1

公开(公告)日：2017-05-25

申请号：US15348627

申请日：2016-11-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shoji Takeda ,  Katsuyuki Yamazaki

IPC: B41J2/385 ,  H04N1/40 ,  H04N1/00 ,  H04N1/23 ,  H04N1/04

CPC classification number: G03G15/043 ,  G03G15/04072 ,  G03G2215/0129 ,  H04N1/0083 ,  H04N1/04 ,  H04N1/2369 ,  H04N1/40037 ,  H04N1/40043 ,  H04N1/4056 ,  H04N2201/0094

Abstract: A setting unit of a controller mounted on a control board sets a first mode for generating, from image data, PWM data indicating a pattern for causing an LD to emit light and transmitting to a laser driving board, or a second mode for transmitting to the laser driving board image data prior to generation of the PWM data. A data conversion unit, in the first mode, converts inputted image data into N pieces of PWM data respectively corresponding to N LDs, and in the second mode, converts inputted image data into image data for each scanning line. A P/S conversion unit converts data outputted from the data conversion unit from a serial format into a parallel format, and transmits the converted data to the laser driving board as control data.

公开(公告)号：US20130286142A1

公开(公告)日：2013-10-31

申请号：US13860366

申请日：2013-04-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Katsuyuki Yamazaki

IPC: B41J2/435

CPC classification number: G03G13/04 ,  G03G15/04072 ,  G03G15/043

Abstract: Density unevenness caused by an optical facet angle error or the like of a polygon mirror which has a plurality of reflection planes is corrected after shipment with a simple configuration. At least one of the plurality of reflection planes is identified as a reference plane. A plurality of pieces of light amount adjustment data for changing the light amount of light deflected for each reflection plane with the reference plane as a reference, and at least one piece of light amount correction data for correcting the light amount based on the plurality of pieces of light amount adjustment data are stored. When a light source emits light, one mode can be selected out of a test print mode (S5) in which light is emitted in a light amount based on the plurality of pieces of light amount adjustment data and a corrected print mode (S13) in which light based on the light amount correction data is emitted.

Abstract translation: 在具有多个反射面的多面体镜的光学小角度误差等引起的密度不均匀性以简单的结构进行出货后的校正。 将多个反射面中的至少一个识别为参考平面。 多个光量调整数据，用于以参考平面为基准改变每个反射面偏转的光的光量;以及至少一个光量校正数据，用于基于多个片来校正光量 存储光量调整数据。 当光源发光时，可以从测试打印模式（S5）中选择一种模式，其中基于多条光量调节数据和校正打印模式（S13），以光量发射光 发出基于光量校正数据的光。

公开(公告)号：US20190238076A1

公开(公告)日：2019-08-01

申请号：US16355991

申请日：2019-03-18

Applicant: CANON KABUSHIKI KAISHA

Inventor： Katsuyuki Yamazaki

IPC: H02P8/12 ,  H02P5/46 ,  H02P21/18 ,  H02P21/22 ,  H02P8/34 ,  G03G15/00

CPC classification number: H02P8/12 ,  B41J29/38 ,  G03G15/602 ,  H02M7/48 ,  H02M7/493 ,  H02P5/46 ,  H02P8/34 ,  H02P21/18 ,  H02P21/22

Abstract: Provided is a motor control device capable of suppressing degradation in AD convert accuracy even when an A/D converter is shared by a plurality of motors. The motor control device provided to an image forming apparatus includes: a plurality of motors each including two or more phase coils; PWM function portions configured to control drive of the plurality of motors; motor drive controllers; and shared A/D converters configured to detect currents flowing through at least coils of two phases among phase coils of each of the plurality of motors and perform current detection for a plurality of phases of the each of the plurality of motors in a time-sharing manner.

公开(公告)号：US09557679B2

公开(公告)日：2017-01-31

申请号：US14557118

申请日：2014-12-01

Applicant: CANON KABUSHIKI KAISHA

Inventor： Katsuyuki Yamazaki

IPC: G03G15/04 ,  G03G15/043

CPC classification number: G03G15/043 ,  G03G15/04072

Abstract: A light source array includes a first group of light sources having laser elements and a second group of light sources having laser elements. A first laser driver drives the laser elements and a second laser driver drives the laser elements. The first group of light sources and the second group of light sources execute multiple exposure. For example, the second group of light sources executes a first exposure and the first group of light sources executes a second exposure. In other words, the first group of light sources and the second group of light sources are driven by the first laser driver and the second laser driver, respectively, so as to expose the same position.

Abstract translation: 光源阵列包括具有激光元件的第一组光源和具有激光元件的第二组光源。 第一激光驱动器驱动激光元件，第二激光驱动器驱动激光元件。 第一组光源和第二组光源执行多次曝光。 例如，第二组光源执行第一曝光，并且第一组光源执行第二曝光。 换句话说，第一组光源和第二组光源分别由第一激光驱动器和第二激光驱动器驱动，以暴露相同的位置。

公开(公告)号：US08823762B2

公开(公告)日：2014-09-02

申请号：US13860366

申请日：2013-04-10

Applicant: Canon Kabushiki Kaisha

Inventor： Katsuyuki Yamazaki

IPC: B41J2/435 ,  G03G13/04 ,  G03G15/043 ,  G03G15/04

CPC classification number: G03G13/04 ,  G03G15/04072 ,  G03G15/043

Abstract: Density unevenness caused by an optical facet angle error or the like of a polygon mirror which has a plurality of reflection planes is corrected after shipment with a simple configuration. At least one of the plurality of reflection planes is identified as a reference plane. A plurality of pieces of light amount adjustment data for changing the light amount of light deflected for each reflection plane with the reference plane as a reference, and at least one piece of light amount correction data for correcting the light amount based on the plurality of pieces of light amount adjustment data are stored. When a light source emits light, one mode can be selected out of a test print mode (S5) in which light is emitted in a light amount based on the plurality of pieces of light amount adjustment data and a corrected print mode (S13) in which light based on the light amount correction data is emitted.

Abstract translation: 在具有多个反射面的多面体镜的光学小角度误差等引起的密度不均匀性以简单的结构进行出货后的校正。 将多个反射面中的至少一个识别为参考平面。 多个光量调整数据，用于以参考平面为基准改变每个反射面偏转的光的光量;以及至少一个光量校正数据，用于基于多个片来校正光量 存储光量调整数据。 当光源发光时，可以从测试打印模式（S5）中选择一种模式，其中基于多条光量调节数据和校正打印模式（S13），以光量发射光 发出基于光量校正数据的光。

公开(公告)号：US09575432B2

公开(公告)日：2017-02-21

申请号：US14675993

申请日：2015-04-01

Applicant: CANON KABUSHIKI KAISHA

Inventor： Katsuyuki Yamazaki

IPC: G03G15/00 ,  G03G15/043 ,  B41J2/455 ,  B41J2/45 ,  G03G15/04

CPC classification number: G03G15/043 ,  B41J2/45 ,  B41J2/455 ,  G03G15/04072 ,  G03G2215/0404

Abstract: Laser driver ICs each drive different light-emitting portions and supply a driving current to one or more light-emitting portions among light-emitting portions included in a semiconductor laser. An image forming apparatus controls the laser driver ICs such that the light-emitting portions, which are each driven by a different laser driver IC, emit light beams in sequence, and measures a time interval between two BD signals generated by a BD sensor due to the light beams being incident thereon. Furthermore, based on the measured value, the image forming apparatus controls relative timings according to which the light-emitting portions emit the light beams based on image data.

Abstract translation: 激光驱动器IC各自驱动不同的发光部分，并且向包括在半导体激光器中的发光部分中的一个或多个发光部分提供驱动电流。 图像形成装置控制激光驱动器IC，使得由不同的激光驱动IC驱动的发光部分依次发光，并且测量由BD传感器产生的两个BD信号之间的时间间隔 光束入射在其上。 此外，基于测量值，图像形成装置基于图像数据控制发光部分发射光束的相对定时。

公开(公告)号：US09568853B2

公开(公告)日：2017-02-14

申请号：US14311514

申请日：2014-06-23

Applicant: CANON KABUSHIKI KAISHA

Inventor： Katsuyuki Yamazaki

IPC: B41J2/435 ,  G03G15/043

CPC classification number: G03G15/043

Abstract: In APC, if light power control with different target light powers is continuously executed, the amplitude of an output signal from a light-receiving element after the light power control is changed is generated, and a long time is required for completion of the light power control after the change. To address the problem, light power control with the same target light power is continuously executed on at least two light-emitting points in APC.

Abstract translation: 在APC中，如果持续执行具有不同目标光功率的光功率控制，则在光功率控制改变后来自光接收元件的输出信号的振幅被产生，并且需要长时间来完成光功率 改变后控制。 为了解决该问题，在APC中的至少两个发光点连续地执行具有相同目标光功率的光功率控制。

公开(公告)号：US09229352B2

公开(公告)日：2016-01-05

申请号：US13871369

申请日：2013-04-26

Applicant: CANON KABUSHIKI KAISHA

Inventor： Katsuyuki Yamazaki

IPC: G03G15/043

CPC classification number: G03G15/043

Abstract: An image forming apparatus capable of correcting light amounts of light beams which expose a photosensitive member with simple construction. The image forming apparatus includes a photosensitive drum, and a beam scanning device including a plurality of semiconductor lasers which emit light beams for exposing the photosensitive drum, and a memory which stores first correction data for correcting the light amount of each light beam in a manner associated with each of the plurality of semiconductor lasers. A CPU outputs second correction data for being commonly used in correcting the light amounts of the light beams emitted from the plurality of semiconductor lasers to the beam scanning device. A laser driver IC provided in the beam scanning device controls the light amount of the light beam emitted from each semiconductor laser based on the first correction data and the second correction data.

Abstract translation: 一种图像形成装置，其能够以简单的结构校正曝光感光构件的光束的光量。 图像形成装置包括感光鼓和包括发射用于曝光感光鼓的光束的多个半导体激光器的光束扫描装置，以及存储以一种方式存储用于校正每个光束的光量的第一校正数据的存储器 与所述多个半导体激光器中的每一个相关联。 CPU CPU输出用于校正从多个半导体激光器发射的光束到光束扫描装置的光量的共同使用的第二校正数据。 设置在光束扫描装置中的激光器驱动器IC基于第一校正数据和第二校正数据控制从每个半导体激光器发射的光束的光量。

公开(公告)号：US09551954B2

公开(公告)日：2017-01-24

申请号：US13859593

申请日：2013-04-09

Applicant: CANON KABUSHIKI KAISHA

Inventor： Katsuyuki Yamazaki

IPC: G03G15/043 ,  G03G15/00

CPC classification number: G03G15/043 ,  G03G15/5062

Abstract: An image forming apparatus is provided that can adjust an inclination deviation even after a laser scanner unit and a photosensitive drum are embedded. A CPU 601 selects at least two screen angles from among screen angles, and generates image signals corresponding to the respective selected at least two screen angles, based on these angles. The CPU 601 causes light emitting elements to emit light beams at different emission timings with reference to a timing on which a BD 803 detects the light beam, based on a generated image signal, thereby forming latent images of test images on a photosensitive drum. The latent images formed on the photosensitive drum are developed, and test images are formed on a recording medium.

Abstract translation: 提供了即使在激光扫描仪单元和感光鼓被嵌入之后也可以调整倾斜偏差的图像形成装置。 CPU 601从屏幕角度中选择至少两个屏幕角度，并且基于这些角度生成对应于相应选择的至少两个屏幕角度的图像信号。 基于所生成的图像信号，CPU 601使得发光元件参考BD 803检测到光束的定时以不同的发射定时发射光束，从而在感光鼓上形成测试图像的潜像。 显影形成在感光鼓上的潜像，并且在记录介质上形成测试图像。

公开(公告)号：US09188902B2

公开(公告)日：2015-11-17

申请号：US14660778

申请日：2015-03-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Katsuyuki Yamazaki

IPC: B41J2/435 ,  B41J2/385 ,  G03G15/043

CPC classification number: G03G15/043 ,  G03G15/5033

Abstract: There is provided an image forming apparatus that reduces an operation speed of a unit configured to generate pieces of correction data with which the light intensity of laser light is corrected. Pieces of first correction data in a scanning direction of a photoconductor drum are associated with light sources and stored in memories. For a plurality of regions of the surface of the photoconductor drum, a CPU outputs, for each of the regions, pieces of correction data including pieces of second correction data for correction of electric potential characteristics of the region. The positions of pieces of first correction data match some of the positions of pieces of second correction data. A laser driver IC controls light intensity of laser light at the timing of the pieces of second correction data in accordance with a piece of first correction data and a piece of second correction data.

Abstract translation: 提供一种图像形成装置，其降低被配置为生成修正激光的光强度的校正数据的单元的操作速度。 感光鼓的扫描方向上的第一校正数据的片段与光源相关联并存储在存储器中。 对于感光鼓的表面的多个区域，CPU为每个区域输出包括用于校正该区域的电位特性的第二校正数据的修正数据。 第一校正数据段的位置与第二校正数据段的某些位置相匹配。 激光驱动器IC根据一条第一校正数据和一条第二校正数据来控制在第二校正数据段的定时处的激光的光强度。