公开(公告)号：US20180154655A1

公开(公告)日：2018-06-07

申请号：US15832041

申请日：2017-12-05

Applicant: Konica Minolta, Inc.

Inventor： Masayuki Iljima ,  Takaki Uemura ,  Makoto Obayashi

IPC: B41J2/45 ,  G09G3/3208

Abstract: A relative position detection method detecting a position of a light-emitting member relative to a lens array or a position of the lens array relative to the light-emitting member, in which the light-emitting member includes light-emitting elements arranged in a first direction and the lens array includes lenses arranged in the first direction and condenses light from the light-emitting elements to image positions of the light-emitting elements, optical axes of the lenses being orthogonal to the first direction. The method includes: causing the light-emitting elements to emit light; detecting, at a position displaced from the image positions along an optical axis direction, optical intensity distribution of light emitted from the light-emitting elements and transmitted through the lens array; and detecting a position of the light-emitting member relative to the lens array or a position of the lens array relative to the light-emitting member with use of the optical intensity distribution.

公开(公告)号：US09335652B2

公开(公告)日：2016-05-10

申请号：US14182379

申请日：2014-02-18

Applicant: Konica Minolta, Inc.

Inventor： Yoshikazu Watanabe ,  Satoshi Masuda ,  Makoto Obayashi ,  Masayuki Iijima ,  So Yano

IPC: G03G15/043 ,  G03G15/04

CPC classification number: G03G15/043 ,  G03G15/04054

Abstract: An optical writing device having; a plurality of light-emitting points; a plurality of drive circuits for supplying drive currents to the plurality of light-emitting points respectively; a photodetector for outputting signals indicating quantities of light entering thereto from the respective light-emitting points; a gain switch circuit for outputting photodetection signals obtained by amplifying the signals output from the photodetector in regard to the respective light-emitting points with gains preset for the respective light-emitting points; and a control circuit for controlling the drive circuits such that the photodetection signals output from the gain switch circuit in regard to the respective light-emitting points coincide with a value substantially equal to a predetermined reference value. The gains for the respective light-emitting points are preset based on the distances between the photodetector and the respective light-emitting points.

Abstract translation: 一种光写入装置，具有： 多个发光点; 多个驱动电路，用于分别向多个发光点提供驱动电流; 光电检测器，用于输出指示从各个发光点进入的光量的信号; 增益切换电路，用于输出通过对于各个发光点放大对于各个发光点从光检测器输出的信号而获得的增益，该增益为各个发光点预先设定的增益; 以及控制电路，用于控制驱动电路，使得从增益开关电路输出的关于各个发光点的光检测信号与基本上等于预定基准值的值一致。 基于光电检测器和各个发光点之间的距离来预设各个发光点的增益。

公开(公告)号：US09110399B2

公开(公告)日：2015-08-18

申请号：US14204725

申请日：2014-03-11

Applicant: Konica Minolta, Inc.

Inventor： Satoshi Masuda ,  Yoshikazu Watanabe ,  Makoto Obayashi ,  Masayuki Iijima ,  So Yano

IPC: B41J29/393 ,  G03G15/043 ,  G03G15/04

CPC classification number: G03G15/043 ,  G03G15/04054

Abstract: An optical writing device for forming an electrostatic latent image on a photoreceptor by exposing the photoreceptor to light modulated in accordance with image data. The optical writing device has: a substrate; a light-emitting-element array including a plurality of light-emitting elements supported by the substrate to be arranged in a main-scanning direction; and a light-receiving-element array substantially in parallel to the light-emitting-element array, the light-receiving-element array including a plurality of light-receiving elements supported by the substrate to be arranged in the main-scanning direction. For light-quantity measurement of one of the light-emitting elements, at least an output value output from one of the light-receiving elements of which center is located in a different position, with respect to the main-scanning direction, from a center of the one of the light-emitting elements is used.

Abstract translation: 一种光学写入装置，用于通过将感光体暴露于根据图像数据调制的光，在感光体上形成静电潜像。 光写入装置具有：基板; 发光元件阵列，其包括被配置在主扫描方向上的由所述基板支撑的多个发光元件; 以及与发光元件阵列大致平行的受光元件阵列，所述受光元件阵列包括由所述基板支撑的多个受光元件，所述受光元件沿主扫描方向配置。 对于一个发光元件的光量测量，至少从其中心的一个光接收元件相对于主扫描方向位于不同位置的输出值从中心 使用发光元件之一。

公开(公告)号：US20150103865A1

公开(公告)日：2015-04-16

申请号：US14511205

申请日：2014-10-10

Applicant: KONICA MINOLTA, INC.

Inventor： So YANO ,  Satoshi Masuda ,  Makoto Obayashi ,  Masayuki Iljima ,  Yoshikazu Watanabe

IPC: G01K13/00 ,  G03G15/043 ,  B41J2/44 ,  G01J1/42 ,  G01K11/00

CPC classification number: G03G15/043 ,  B41J2/45 ,  G01K7/01 ,  G01K7/42 ,  G06K15/027 ,  G06K15/1247

Abstract: An optical writing device having; a plurality of light-emitting points; a photodiode configured to output a signal which represents a quantity of incident light from a predetermined light-emitting point selected from the plurality of light-emitting points; and a calculation section for calculating a temperature of the photodiode based on a magnitude of a photodiode dark current included in the signal output from the photodiode while the predetermined light-emitting point is OFF.

Abstract translation: 一种光写入装置，具有： 多个发光点; 光电二极管，被配置为输出表示来自所述多个发光点中的预定发光点的入射光量的信号; 以及计算部，用于基于当预定发光点为OFF时从光电二极管输出的信号中包括的光电二极管暗电流的大小来计算光电二极管的温度。

公开(公告)号：US10809643B2

公开(公告)日：2020-10-20

申请号：US16355342

申请日：2019-03-15

Applicant: Konica Minolta, Inc.

Inventor： Takafumi Yuasa ,  Hidenari Tachibe ,  Masayuki Iijima ,  Makoto Obayashi ,  Wataru Senoo

IPC: G03G15/043 ,  G02B26/12 ,  G03G15/04 ,  G02B27/30 ,  G02B27/09

Abstract: An optical scanning device that scans a photoreceptor with light, the device includes: a light emitter that emits light according to a supply current amount; a source-side optical system that includes an optical element corresponding to the light emitter, the optical element transmitting and shaping the light emitted from the corresponding light emitter; a polygon mirror that cyclically deflects the light shaped by the source-side optical system; an image-side optical system that condenses the light deflected by the polygon mirror on a surface of the photoreceptor; a motor that rotates the polygon mirror; and a light source controller that: monitors a temperature of the optical element; and adjusts the supply current amount for the light emitter or adjusts the temperature of the optical element corresponding to the light emitter to make a temperature difference between the light emitter and the corresponding optical element fall within an allowable range.

公开(公告)号：US10744791B2

公开(公告)日：2020-08-18

申请号：US16291830

申请日：2019-03-04

Applicant: Konica Minolta, Inc.

Inventor： Takaki Uemura ,  Makoto Obayashi ,  Masayuki Iijima

IPC: B41J2/45 ,  H04N1/036 ,  G03G15/043 ,  G03G15/04

Abstract: An optical print head that performs optical writing to a photoreceptor includes: a light transmissive substrate; a light emitting unit including light emitting element groups, each of which includes two or more light emitting elements disposed on a first main surface of the substrate; a lens array including lenses that correspond one-to-one to the light emitting element groups; light detection units disposed above the second main surface of the substrate in one-to-one correspondence to the light emitting element groups and that detects the light from each of the light emitting elements; and correction unit that corrects light amounts of the light emitting elements of the light emitting element group based on detection of the light detection units.

公开(公告)号：US10737507B2

公开(公告)日：2020-08-11

申请号：US15832041

申请日：2017-12-05

Applicant: Konica Minolta, Inc.

Inventor： Masayuki Iljima ,  Takaki Uemura ,  Makoto Obayashi

IPC: B41J2/45 ,  G02B19/00

Abstract: A relative position detection method detecting a position of a light-emitting member relative to a lens array or a position of the lens array relative to the light-emitting member, in which the light-emitting member includes light-emitting elements arranged in a first direction and the lens array includes lenses arranged in the first direction and condenses light from the light-emitting elements to image positions of the light-emitting elements, optical axes of the lenses being orthogonal to the first direction. The method includes: causing the light-emitting elements to emit light; detecting, at a position displaced from the image positions along an optical axis direction, optical intensity distribution of light emitted from the light-emitting elements and transmitted through the lens array; and detecting a position of the light-emitting member relative to the lens array or a position of the lens array relative to the light-emitting member with use of the optical intensity distribution.

公开(公告)号：US20190079428A1

公开(公告)日：2019-03-14

申请号：US16115843

申请日：2018-08-29

Applicant: KONICA MINOLTA, INC.

Inventor： Takaki Uemura ,  Makoto Obayashi ,  Masayuki Iijima

IPC: G03G15/043 ,  G03G15/04

Abstract: A print head for writing data onto a photoreceptor, including a light source panel of light emitting elements arranged in a matrix, optical systems arranged in a matching matrix, light receiving elements, and a corrector. The optical systems each include at least a light-source-side lens and an image-side lens, and focus light from the light emitting elements onto different regions of the photoreceptor. The light receiving elements each include a light receiving surface disposed in a leaked light region and detect light incident on the light receiving surface. The leaked light region is in a gap between the light-source-side lens and the image-side lens of each of the optical systems occupied by optical paths of light transmitted through the light-source-side lenses but not incident on the image-side lenses. The corrector corrects amounts of light to be emitted from the light emitting elements based on the light detected.

公开(公告)号：US09594327B2

公开(公告)日：2017-03-14

申请号：US14699189

申请日：2015-04-29

Applicant: KONICA MINOLTA INC.

Inventor： Satoshi Masuda ,  Makoto Obayashi ,  Yoshikazu Watanabe ,  Masayuki Iijima ,  So Yano ,  Takaki Uemura

IPC: G03G15/04 ,  G09G5/18 ,  G09G3/3283 ,  G09G3/32

CPC classification number: G03G15/04054 ,  G09G3/3283 ,  G09G5/18 ,  G09G2300/0426

Abstract: An optical writing device includes a plurality of current driven light emitting elements, first and second power source lines, a designation circuit that outputs a designation potential, first driving circuits provided for each of the light emitting elements to supply driving current to the corresponding light emitting element, second driving circuits provided for each of the light emitting elements to supply driving current to the corresponding light emitting element, and a switching control unit that alternately switches respective states of the first and second driving circuits between a state where one of the first and second driving circuits receives the designation potential while the other driving circuit supplies the driving current, and a state where the other driving circuit receives the designation potential while the one driving circuit supplies the driving current.

Abstract translation: 光学写入装置包括多个电流驱动发光元件，第一和第二电源线，输出指定电位的指定电路，为每个发光元件提供的第一驱动电路，以向相应的发光元件提供驱动电流 为每个发光元件提供的元件第二驱动电路，以向相应的发光元件提供驱动电流;以及切换控制单元，其交替地切换第一和第二驱动电路的各自的状态， 第二驱动电路在另一个驱动电路提供驱动电流的同时接收指定电位，另一个驱动电路在一个驱动电路提供驱动电流的同时接收指定电位的状态。

公开(公告)号：US09254678B2

公开(公告)日：2016-02-09

申请号：US14664086

申请日：2015-03-20

Applicant: Konica Minolta, Inc.

Inventor： Yoshikazu Watanabe ,  Satoshi Masuda ,  Makoto Obayashi ,  Masayuki Iijima ,  So Yano ,  Takaki Uemura

IPC: B41J2/435 ,  B41J2/47

CPC classification number: B41J2/47 ,  B41J2/451 ,  B41J2002/453

Abstract: Optical print head includes: light-emitting elements connected one-to-one to current supply lines branching from first power line at different positions in longitudinal direction; holding elements; signal writing unit writing luminance signal into each holding element, the luminance signal being represented by voltage indicating light emission amount of corresponding light-emitting element; second power line supplying reference voltage to each holding element, the reference voltage being reference when signal writing unit writes luminance signal into holding element; and driving drivers corresponding one-to-one with current supply lines and controlling current supplied to corresponding current supply line from first power line, in accordance with voltage held in corresponding holding element when signal writing unit has written luminance signal into corresponding holding element, wherein power source supplying the reference voltage to second power line is common with power source supplying voltage to signal output subunit outputting luminance signal.

Abstract translation: 光学打印头包括：与第一电源线在纵向不同位置分支的电流供应线路一对一连接的发光元件; 持有元素 信号写入单元将亮度信号写入每个保持元件，所述亮度信号由表示对应的发光元件的发光量的电压表示; 第二电力线向每个保持元件提供参考电压，参考电压是信号写入单元将亮度信号写入保持元件时的参考电压; 以及当信号写入单元将亮度信号写入到相应的保持元件中时，根据当前保持在相应的保持元件中的电压，从第一电力线控制提供给相应电流线的电流，驱动驱动器与当前电源线一一对应， 向第二电力线提供参考电压的电源对于输出亮度信号的信号输出子单元的电源提供电压是常见的。