公开(公告)号：US20150239258A1

公开(公告)日：2015-08-27

申请号：US14619476

申请日：2015-02-11

Applicant: Konica Minolta, Inc.

Inventor： So YANO ,  Yoshikazu WATANABE ,  Makoto OBAYASHI ,  Masayuki IIJIMA ,  Takaki UEMURA ,  Satoshi MASUDA

IPC: B41J2/45

CPC classification number: B41J2/45

Abstract: An optical print head performs optical writing onto target, and includes: current-driven light-emitting elements arranged in rows in a predetermined direction; driving transistors that are each electrically series-connected with the light-emitting elements in one-to-one correspondence, and each supply a driving current to a corresponding light-emitting element; a current control unit that controls, for each light-emitting element, a driving current amount in accordance with variation in light-emitting properties of the light-emitting element that indicate relation between the driving current amount and a light amount emitted by the light-emitting element; an application unit that, upon receiving electrical power supplied from an external power source, applies application voltage to circuits each consisting of a light-emitting element and a corresponding driving transistor; and a voltage control unit that suppresses variation in divided voltage applied to each driving transistor by controlling the application unit to apply increased application voltage of the driving current amount increases.

Abstract translation: 光学打印头对目标进行光学写入，并且包括：沿预定方向排成行的电流驱动发光元件; 驱动晶体管与发光元件电连接一一对应，并且各自向对应的发光元件提供驱动电流; 电流控制单元，对于每个发光元件，根据表示驱动电流量与由发光元件发射的光量之间的关系的发光元件的发光特性的变化来控制驱动电流量， 发光元件; 应用单元，在接收到从外部电源供给的电力时，对由发光元件和相应的驱动晶体管组成的电路施加施加电压; 以及电压控制单元，其通过控制施加单元施加增加的驱动电流量的施加电压来抑制施加到每个驱动晶体管的分压的变化。

公开(公告)号：US20150317953A1

公开(公告)日：2015-11-05

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: G09G5/18 ,  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：US20140232805A1

公开(公告)日：2014-08-21

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

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; 以及用于控制驱动电路的控制电路，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参考值的值一致。 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：US20180367693A1

公开(公告)日：2018-12-20

申请号：US15974949

申请日：2018-05-09

Applicant: KONICA MINOLTA, INC.

Inventor： Makoto OBAYASHI ,  Takaki UEMURA ,  Masayuki IIJIMA

IPC: B41J2/385 ,  H04N1/028

CPC classification number: H04N1/02865 ,  F21Y2115/10 ,  G03G15/0415 ,  G03G15/043 ,  G03G15/0806 ,  G03G15/607

Abstract: An image forming deviceincludes: a photoreceptor; a longitudinal light emitting member constituted from light emitting element rows that are arranged in a lateral direction and are each constituted from light emitting elements arranged in a longitudinal direction; an optical member that is longitudinal and is disposed to condense light emitted from the light emitting elements onto the photoreceptor; and a hardware processor that: selects and causes one or more light emitting elements for each light emitting element row to emit light; acquires an exposure amount for each light emitting element row; calculates a distribution of the exposure amounts acquired for the light emitting element rows, and calculates a position in the lateral direction corresponding to a predetermined exposure amount in the distribution; and judges whether a difference between the calculated position and a reference position in the lateral direction at a reference time is less than a threshold value.

公开(公告)号：US20160018755A1

公开(公告)日：2016-01-21

申请号：US14800803

申请日：2015-07-16

Applicant: KONICA MINOLTA, INC.

Inventor： Makoto OBAYASHI ,  Satoshi MASUDA ,  Yoshikazu WATANABE ,  Masayuki IIJIMA ,  So YANO ,  Takaki UEMURA

IPC: B41J2/385

CPC classification number: G03G15/04054 ,  G03G15/043

Abstract: An optical print head includes: light-emitting elements in line shape; first power line supplying first reference voltage; second power line supplying drive current to each light-emitting element and supplying second reference voltage; DAC outputting first voltage indicating light emission amount of each light-emitting element; first elements for holding first voltage difference between the first reference voltage and the first voltage; second elements each electrically connectable with corresponding first element and for holding second voltage difference between the second reference voltage and second voltage according to the first voltage, and during supply of drive current, controls each first element to hold the first difference by electrically disconnecting the first and second elements, and temporarily suspends supply of the drive current, and controls the second element to hold the second difference by electrically connecting the first and second elements, such that the drive current according to the second voltage difference is supplied.

Abstract translation: 光学打印头包括：线形的发光元件; 第一电源线提供第一参考电压; 第二电力线向每个发光元件提供驱动电流并提供第二参考电压; DAC输出表示每个发光元件的发光量的第一电压; 用于保持所述第一参考电压和所述第一电压之间的第一电压差的第一元件; 第二元件，其可以与相应的第一元件电连接，并且用于根据第一电压保持第二参考电压和第二电压之间的第二电压差，并且在供应驱动电流期间，通过电连接第一电压 和第二元件，并且暂时停止驱动电流的供给，并且通过电连接第一和第二元件来控制第二元件以保持第二差异，使得提供根据第二电压差的驱动电流。

公开(公告)号：US20160011535A1

公开(公告)日：2016-01-14

申请号：US14790341

申请日：2015-07-02

Applicant: KONICA MINOLTA, INC.

Inventor： So YANO ,  Yoshikazu WATANABE ,  Makoto OBAYASHI ,  Masayuki IIJIMA ,  Takaki UEMURA ,  Satoshi MASUDA

IPC: B41J2/385

CPC classification number: G03G15/043 ,  G03G15/04063

Abstract: An optical print head for forming an electrostatic latent image on a photosensitive body, including: current-driven light-emitting elements disposed in a line shape; an indicator circuit that outputs indicator current indicating light emission amounts to the light-emitting elements; and for each light-emitting element: a holding circuit that, during a main scanning period, accumulates indicator current during a sample period to generate an indicator potential and holds the indicator potential during a hold period; and a drive circuit that supplies drive current to the light-emitting element according to the indicator potential, wherein each of the sample periods is divided into writing periods, and each of the holding circuits holds the indicator potential corresponding to the holding circuit according to a total of indicator current amounts in the sample period corresponding to the holding circuit, the indicator current amounts each indicative of indicator current during one of the writing periods.

Abstract translation: 一种用于在感光体上形成静电潜像的光学打印头，包括：以线状布置的电流驱动的发光元件; 指示电路，其向所述发光元件输出指示发光量的指示电流; 并且对于每个发光元件：保持电路，其在主扫描周期期间在采样周期期间累积指示电流以产生指示电位并在保持期间保持指示电位; 以及驱动电路，其根据指示电位向发光元件供给驱动电流，其中每个采样周期被划分为写入周期，并且每个保持电路根据一个保持电路保持与保持电路相对应的指示电位 对应于保持电路的采样周期中的指示器电流量的总和，在一个写入周期期间的每个指示电流的指示器电流量。

公开(公告)号：US20150266310A1

公开(公告)日：2015-09-24

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: B41J2/47

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，从当前电源线驱动一对一的驱动驱动器，并控制从第一电源线提供给相应的电流线的电流，其中 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。

公开(公告)号：US20140267527A1

公开(公告)日：2014-09-18

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: G03G15/043

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。