公开(公告)号：US11611674B2

公开(公告)日：2023-03-21

申请号：US17332326

申请日：2021-05-27

Applicant: Hidemasa Morimoto ,  Koichi Murota ,  Masashi Hommi ,  Yuki Osato ,  Yuusuke Tomura

Inventor： Hidemasa Morimoto ,  Koichi Murota ,  Masashi Hommi ,  Yuki Osato ,  Yuusuke Tomura

IPC: H04N1/04 ,  H04N1/00 ,  H04N1/29 ,  G03G15/00 ,  G03G15/22

Abstract: An image forming apparatus includes a reading table, an image reading device, an image forming device with an exposure device, and circuitry. The reading device reads a pattern on a recording medium on the table, and generates image data of the pattern. The exposure device includes a light emitting element to form an electrostatic latent image, based on which the image forming device forms the pattern. Based on first and second correction values, the circuitry calculates a third correction value to correct a light amount of the light emitting element. The exposure device includes a driving device that drives the light emitting element based on the third correction value. The circuitry sets at least two or more determination areas in each of a white area and a pattern area of the medium, and determines whether the medium has a rise based on density data in the determination areas.

公开(公告)号：US10514646B2

公开(公告)日：2019-12-24

申请号：US15990317

申请日：2018-05-25

Applicant: Susumu Narita ,  Yoshinobu Sakaue ,  Ryo Sato ,  Koichi Murota ,  Masashi Suzuki ,  Takuma Nishio ,  Hiroaki Nishina

Inventor： Susumu Narita ,  Yoshinobu Sakaue ,  Ryo Sato ,  Koichi Murota ,  Masashi Suzuki ,  Takuma Nishio ,  Hiroaki Nishina

IPC: G03G15/00 ,  G03G15/043

Abstract: An image forming apparatus includes a latent image bearer, a latent image writing device, a developing device, a conveyance unit to convey a recording medium, a transfer device, a length data acquisition unit to obtain a length of the recording medium in a conveyance direction of the recording medium, an image forming processor to form a test pattern, and a light quantity correction calculator that acquires image density data of the test pattern and calculates a light quantity correction value to correct a light quantity. The image forming processor sets a position of the test pattern on the recording medium in the conveyance direction of the recording medium and a length of the test pattern in the conveyance direction of the recording medium based on the length of the recording medium in the conveyance direction of the recording medium obtained by the length data acquisition unit.

公开(公告)号：US10437188B2

公开(公告)日：2019-10-08

申请号：US16048567

申请日：2018-07-30

Applicant: Takuma Nishio ,  Yoshinobu Sakaue ,  Susumu Narita ,  Ryo Sato ,  Koichi Murota ,  Masashi Suzuki ,  Hiroaki Nishina

Inventor： Takuma Nishio ,  Yoshinobu Sakaue ,  Susumu Narita ,  Ryo Sato ,  Koichi Murota ,  Masashi Suzuki ,  Hiroaki Nishina

IPC: H04N1/00 ,  G03G15/22 ,  H04N1/053 ,  H04N1/047 ,  G03G15/04 ,  H04N1/60

Abstract: An image forming apparatus includes an image reading device; an image forming device including a photoconductor, a charger, an exposure device including a light-emitting element, a memory to store a first correction value for correction a light emission amount of the light-emitting element, and a driver to drive the light-emitting element, a developing device, a transfer device, and a fixing device. The image forming apparatus further includes a processor to calculate a second correction value for correcting the light emission amount, based on density data of image data of a predetermined pattern on a recording medium; calculate a third correction value for correcting the light emission amount, based on the first correction value and the second correction value; and determine, before calculating the third correction value, whether placement of the recording medium on the reading table is correct based on the density data.

公开(公告)号：US09310710B2

公开(公告)日：2016-04-12

申请号：US14632188

申请日：2015-02-26

Applicant: Masashi Suzuki ,  Koichi Murota ,  Tatsuo Ohyama ,  Yuichiro Shukuya ,  Tatsuya Miyadera

Inventor： Masashi Suzuki ,  Koichi Murota ,  Tatsuo Ohyama ,  Yuichiro Shukuya ,  Tatsuya Miyadera

IPC: G03G15/043

CPC classification number: G03G15/043

Abstract: An image writing device includes an exposure device to repeatedly expose a surface of an image bearer along a main-scanning direction during an image forming period to write an image on the image bearer, a speed change detector to detect a change in moving speed in a sub-scanning direction of the surface of the image bearer, a first signal generation circuit to generate a first signal, an image forming period signal generation circuit to generate an image forming period signal synchronously with the first signal, a second signal generation circuit to generate a second signal, the second signal initially appearing in the image forming period being in synchronization with the first signal, and a line synchronization signal generation circuit to generate a line synchronization signal synchronously with the second signal and transmit the line synchronization signal to the exposure device during the image forming period.

Abstract translation: 一种图像写入装置，包括：曝光装置，用于在图像形成期间沿图像载体的主扫描方向反复曝光以在图像载体上写入图像;速度变化检测器，用于检测图像载体中的移动速度的变化; 图像载体表面的副扫描方向，产生第一信号的第一信号产生电路，与第一信号同步产生图像形成周期信号的图像形成周期信号产生电路，产生第二信号产生电路 第二信号，最初出现在图像形成周期中的第二信号与第一信号同步;线同步信号产生电路，用于与第二信号同步产生线路同步信号，并将线路同步信号发送到曝光装置 在图像形成期间。

公开(公告)号：US20150261116A1

公开(公告)日：2015-09-17

申请号：US14608732

申请日：2015-01-29

Applicant: Koichi MUROTA ,  Tatsuo OHYAMA ,  Yuichiro SHUKUYA ,  Masashi SUZUKI ,  Tatsuya MIYADERA

Inventor： Koichi MUROTA ,  Tatsuo OHYAMA ,  Yuichiro SHUKUYA ,  Masashi SUZUKI ,  Tatsuya MIYADERA

IPC: B41J2/385

CPC classification number: G03G15/043

Abstract: An image writing device includes an exposure unit including an exposure head, writing an image onto an image bearing surface of a photoconductor by causing the exposure head to repeatedly expose; and a write control unit transmitting image data to be written by the exposure unit to the exposure unit on a one-line basis. Further the write control unit generates a write cycle reference signal having a cycle corresponding to writing resolution, counts a clock by a predetermined count value, generates a write cycle signal by delaying the write cycle reference signal by a time period, generates a data request signal to request transmission of one line of the image data to a controller unit based on the write cycle signal, and stores the one line of the image data transmitted from the controller unit.

Abstract translation: 图像写入装置包括：曝光单元，包括曝光头，通过使曝光头重复曝光将图像写入到感光体的图像承载表面上; 以及写入控制单元，以一行方式将由曝光单元写入的图像数据发送到曝光单元。 此外，写入控制单元生成具有对应于写入分辨率的周期的写周期参考信号，对时钟计数预定的计数值，通过将写周期参考信号延迟一段时间来生成写入周期信号，产生数据请求信号 基于写入周期信号请求将一行图像数据发送到控制器单元，并存储从控制器单元发送的图像数据的一行。

公开(公告)号：US08570355B2

公开(公告)日：2013-10-29

申请号：US13229982

申请日：2011-09-12

Applicant: Koichi Murota

Inventor： Koichi Murota

IPC: B41J2/435 ,  B41J2/47

CPC classification number: G03G15/04063 ,  G03G15/04054

Abstract: An optical writing unit includes a plurality of light emitting element arrays, a plurality of clock signal generators, and a plurality of light emitting element controllers. The plurality of light emitting element arrays includes a plurality of light emitting elements aligned in one direction to project light. The plurality of clock signal generators generates image data transfer clock signals having different frequencies. The plurality of light emitting element controllers outputs the image data transfer clock signals received from the plurality of the clock signal generators and image data signals to the plurality of the light emitting element arrays to light up the light emitting elements based on the image data signals. The optical writing unit performs optical writing using light projected from the light emitting element arrays and controlled by the light emitting element controller based on the image data signals.

Abstract translation: 光写入单元包括多个发光元件阵列，多个时钟信号发生器和多个发光元件控制器。 多个发光元件阵列包括沿一个方向排列的多个发光元件以投射光。 多个时钟信号发生器产生具有不同频率的图像数据传送时钟信号。 多个发光元件控制器将从多个时钟信号发生器接收的图像数据传送时钟信号和图像数据信号输出到多个发光元件阵列，以基于图像数据信号点亮发光元件。 光写入单元使用从发光元件阵列投射的光并基于图像数据信号由发光元件控制器进行光写入。

公开(公告)号：US20120194630A1

公开(公告)日：2012-08-02

申请号：US13355140

申请日：2012-01-20

Applicant: Koichi Murota

Inventor： Koichi Murota

IPC: G02B26/12

CPC classification number: G02B26/123 ,  G03G15/0178 ,  G03G15/5008 ,  G03G2215/0158 ,  H04N1/053 ,  H04N1/1135 ,  H04N1/506 ,  H04N2201/0471 ,  H04N2201/04729 ,  H04N2201/04732 ,  H04N2201/04748 ,  H04N2201/04767 ,  H04N2201/04789 ,  H04N2201/04793

Abstract: An image forming apparatus includes: a plurality of optical systems, each of which includes a light-beam generating unit that generates a light beam, a rotary polygon mirror that deflects the light beam so as to scan a image carrier, and a light-beam detecting unit that detects the light beam deflected for scanning at a predetermined position on a scanning path by rotationally driving the rotary polygon mirror; a time-difference measuring unit that measures a time difference between light-beam detecting signals; a generation-timing determining unit that determines time of generation timing for generating a start signal that designates a start of an image writing operation so that the generation timing does not overlap another timing when each of the light-beam detecting signals is output from the corresponding time-difference measuring unit; and a start-signal generating unit that generates the start signal based on the time for the generation timing.

Abstract translation: 一种图像形成装置包括：多个光学系统，每个光学系统包括产生光束的光束产生单元，偏转光束以扫描图像载体的旋转多面镜，以及光束 检测单元，其通过旋转驱动旋转多面镜来检测在扫描路径上的预定位置处被偏转扫描的光束; 测量光束检测信号之间的时间差的时差测量单元; 生成时间确定单元，其确定用于生成表示图像写入操作的开始的开始信号的生成定时的时间，使得当从对应的每个光束检测信号输出每个光束检测信号时，生成定时不与另一定时重叠 时差测量单元; 以及起始信号生成单元，其基于生成定时的时间生成起始信号。

公开(公告)号：US20120069127A1

公开(公告)日：2012-03-22

申请号：US13229982

申请日：2011-09-12

Applicant: Koichi Murota

Inventor： Koichi Murota

IPC: B41J2/47

CPC classification number: G03G15/04063 ,  G03G15/04054

Abstract: An optical writing unit includes a plurality of light emitting element arrays, a plurality of clock signal generators, and a plurality of light emitting element controllers. The plurality of light emitting element arrays includes a plurality of light emitting elements aligned in one direction to project light. The plurality of clock signal generators generates image data transfer clock signals having different frequencies. The plurality of light emitting element controllers outputs the image data transfer clock signals received from the plurality of the clock signal generators and image data signals to the plurality of the light emitting element arrays to light up the light emitting elements based on the image data signals. The optical writing unit performs optical writing using light projected from the light emitting element arrays and controlled by the light emitting element controller based on the image data signals.

Abstract translation: 光写入单元包括多个发光元件阵列，多个时钟信号发生器和多个发光元件控制器。 多个发光元件阵列包括沿一个方向排列的多个发光元件以投射光。 多个时钟信号发生器产生具有不同频率的图像数据传送时钟信号。 多个发光元件控制器将从多个时钟信号发生器接收的图像数据传送时钟信号和图像数据信号输出到多个发光元件阵列，以基于图像数据信号点亮发光元件。 光写入单元使用从发光元件阵列投射的光并基于图像数据信号由发光元件控制器进行光写入。

公开(公告)号：US09223244B2

公开(公告)日：2015-12-29

申请号：US14608732

申请日：2015-01-29

Applicant: Koichi Murota ,  Tatsuo Ohyama ,  Yuichiro Shukuya ,  Masashi Suzuki ,  Tatsuya Miyadera

Inventor： Koichi Murota ,  Tatsuo Ohyama ,  Yuichiro Shukuya ,  Masashi Suzuki ,  Tatsuya Miyadera

IPC: B41J2/385 ,  G03G15/043

CPC classification number: G03G15/043

Abstract: An image writing device includes an exposure unit including an exposure head, writing an image onto an image bearing surface of a photoconductor by causing the exposure head to repeatedly expose; and a write control unit transmitting image data to be written by the exposure unit to the exposure unit on a one-line basis. Further the write control unit generates a write cycle reference signal having a cycle corresponding to writing resolution, counts a clock by a predetermined count value, generates a write cycle signal by delaying the write cycle reference signal by a time period, generates a data request signal to request transmission of one line of the image data to a controller unit based on the write cycle signal, and stores the one line of the image data transmitted from the controller unit.

Abstract translation: 图像写入装置包括：曝光单元，包括曝光头，通过使曝光头重复曝光将图像写入到感光体的图像承载表面上; 以及写入控制单元，以一行方式将由曝光单元写入的图像数据发送到曝光单元。 此外，写入控制单元生成具有对应于写入分辨率的周期的写周期参考信号，对时钟计数预定的计数值，通过将写周期参考信号延迟一段时间来生成写入周期信号，产生数据请求信号 基于写入周期信号请求将一行图像数据发送到控制器单元，并存储从控制器单元发送的图像数据的一行。

公开(公告)号：US20150261117A1

公开(公告)日：2015-09-17

申请号：US14632188

申请日：2015-02-26

Applicant: Masashi SUZUKI ,  Koichi MUROTA ,  Tatsuo OHYAMA ,  Yuichiro SHUKUYA ,  Tatsuya MIYADERA

Inventor： Masashi SUZUKI ,  Koichi MUROTA ,  Tatsuo OHYAMA ,  Yuichiro SHUKUYA ,  Tatsuya MIYADERA

IPC: B41J2/385

CPC classification number: G03G15/043

Abstract: An image writing device includes an exposure device to repeatedly expose a surface of an image bearer along a main-scanning direction during an image forming period to write an image on the image bearer, a speed change detector to detect a change in moving speed in a sub-scanning direction of the surface of the image bearer, a first signal generation circuit to generate a first signal, an image forming period signal generation circuit to generate an image forming period signal synchronously with the first signal, a second signal generation circuit to generate a second signal, the second signal initially appearing in the image forming period being in synchronization with the first signal, and a line synchronization signal generation circuit to generate a line synchronization signal synchronously with the second signal and transmit the line synchronization signal to the exposure device during the image forming period.

Abstract translation: 一种图像写入装置，包括：曝光装置，用于在图像形成期间沿图像载体的主扫描方向反复曝光以在图像载体上写入图像;速度变化检测器，用于检测图像载体中的移动速度的变化; 图像载体表面的副扫描方向，产生第一信号的第一信号产生电路，与第一信号同步产生图像形成周期信号的图像形成周期信号产生电路，产生第二信号产生电路 第二信号，最初出现在图像形成周期中的第二信号与第一信号同步;线同步信号产生电路，用于与第二信号同步产生线路同步信号，并将线路同步信号发送到曝光装置 在图像形成期间。