公开(公告)号：US20200253022A1

公开(公告)日：2020-08-06

申请号：US16774530

申请日：2020-01-28

Applicant: Konica Minolta, Inc.

Inventor： Masayuki IIJIMA ,  Takaki UEMURA ,  Yoshikazu WATANABE ,  Sotaro YOKOTA

IPC: H05B47/105 ,  G03G15/043

Abstract: An optical writing device includes a lens, a plurality of light emitting elements that form one pixel on a photoreceptor through the lens, and a control circuit that controls a light emitting state of each of the plurality of light emitting elements. The control circuit controls the light emitting state of each of the plurality of light emitting elements in accordance with an ambient temperature of the plurality of light emitting elements.

公开(公告)号：US20170168413A1

公开(公告)日：2017-06-15

申请号：US15352884

申请日：2016-11-16

Applicant: KONICA MINOLTA, INC.

Inventor： Takaki UEMURA ,  So YANO ,  Masayuki IIJIMA ,  Takahiro MATSUO ,  Akira TANIYAMA

IPC: B41J2/385

CPC classification number: G03G15/043 ,  G03G15/04054

Abstract: An optical writing device including: a current-driven light-emitting element; a thin film transistor configured to supply the light-emitting element with a drive current based on a luminance signal to put the light-emitting element in an on state; and a controller configured to, for each line of an image page, correct a first value of the luminance signal to yield a second value of the luminance signal, and to supply the thin film transistor with the luminance signal at the second value. The second value compensates for a light amount fluctuation of the light-emitting element that is dependent upon an emission/non-emission history, from an initial line of the image page to the line, of a first continuous period where the light-emitting element is kept in the on state and a second continuous period where the light-emitting period is kept in an off state.

公开(公告)号：US20170123341A1

公开(公告)日：2017-05-04

申请号：US15337662

申请日：2016-10-28

Applicant: Konica Minolta, Inc.

Inventor： Takahiro MATSUO ,  So YANO ,  Masayuki IIJIMA ,  Takaki UEMURA ,  Akira TANIYAMA

IPC: B41J2/385

CPC classification number: G03G15/043 ,  G06K2007/10495 ,  H04N1/06 ,  H04N1/29

Abstract: An optical writing device driving a light-emitting element array, modulating light according to a screening pattern that expresses a dithered image, and performing optical writing by focusing light emitted from the light-emitting element array through a lens array onto a photoreceptor. The optical writing device includes an acquisition unit that acquires a write start position for writing to the photoreceptor in a main scanning direction and a control unit that performs a control when the write start position corresponds to an i-th light-emitting element from a reference position that corresponds to a first light-emitting element in the main scanning direction, i being a positive integer greater than 1, wherein the control unit supplies pixel values to the i-th light-emitting element onwards, the pixel values being assigned from pixels of the screening pattern from an i-th pixel onwards, from a leading pixel of the screening pattern in the main scanning direction.

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：US20160124337A1

公开(公告)日：2016-05-05

申请号：US14921290

申请日：2015-10-23

Applicant: KONICA MINOLTA, INC.

Inventor： Masayuki IIJIMA ,  So YANO ,  Yasushi NAGASAKA ,  Takaki UEMURA ,  Takahiro MATSUO

IPC: G03G15/043 ,  H04N1/00 ,  H04N1/32 ,  G02B3/00

CPC classification number: G03G15/043 ,  G02B3/0006 ,  G03G15/04045 ,  H04N1/00814 ,  H04N1/32587

Abstract: An optical writing device including light-emitting elements forming element arrays. The element arrays are each composed of light-emitting elements arranged in line in a main scanning direction, and reside at respective positions along a sub-scanning direction. A correction unit receives signal values in one-to-one correspondence with the light-emitting elements and performs correction to acquire corrected signal values each indicating a light amount of a corresponding light-emitting element. The correction is for eliminating a light amount difference in the main scanning direction occurring for each element array. A driving unit supplies driving currents to the light-emitting elements based on the corrected signal values, and a control unit performs a control of causing at least two element arrays to emit light for different durations within one main scanning period. The control is for eliminating a light amount difference in the sub scanning direction occurring between the at least two element arrays.

Abstract translation: 一种包括形成元件阵列的发光元件的光学写入装置。 元件阵列由沿主扫描方向排成一行的发光元件构成，并且位于沿副扫描方向的各位置。 校正单元接收与发光元件一一对应的信号值，并执行校正以获取各自指示对应的发光元件的光量的校正信号值。 该校正用于消除针对每个元件阵列发生的主扫描方向的光量差。 驱动单元基于校正的信号值向驱动单元提供驱动电流，并且控制单元执行使至少两个元件阵列在一个主扫描周期内不同持续时间发光的控制。 该控制用于消除在至少两个元件阵列之间发生的副扫描方向上的光量差异。

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。

公开(公告)号：US20170115592A1

公开(公告)日：2017-04-27

申请号：US15282889

申请日：2016-09-30

Applicant: KONICA MINOLTA, INC.

Inventor： So YANO ,  Masayuki IIJIMA ,  Takahiro MATSUO ,  Takaki UEMURA ,  Akira TANIYAMA

IPC: B41J2/385

CPC classification number: G03G15/04054 ,  G03G15/04063

Abstract: A light emitting device configured to cause a series circuit in which an OLED is connected to a thin film transistor to emit light by applying a predetermined voltage to the thin film transistor includes: a forward direction voltage estimating unit configured to estimate a forward direction voltage in a case where the OLED is caused to emit light at a set light quantity; a driving current amount estimating unit configured to estimate a driving current amount required for causing the OLED to emit light at the set light quantity; a source-drain voltage calculating unit configured to calculate a source-drain voltage applied to the thin film transistor from the predetermined voltage and the forward direction voltage; and a gate-source voltage determining unit configured to determine a gate-source voltage of the thin film transistor corresponding to the source-drain voltage in a case where the driving current amount is a drain current.

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。