公开(公告)号：US09035988B2

公开(公告)日：2015-05-19

申请号：US12126103

申请日：2008-05-23

申请人： Yasuhiro Nihei ,  Masaaki Ishida ,  Atsufumi Omori ,  Jun Tanabe

发明人： Yasuhiro Nihei ,  Masaaki Ishida ,  Atsufumi Omori ,  Jun Tanabe

IPC分类号： B41J2/435 ,  B41J2/47

CPC分类号： B41J2/473

摘要： A light source driving device which drives a plurality of light emitting parts provided in a light source to emit a plurality of light beams based on image information, includes a plurality of driving circuits configured to drive the plurality of light emitting parts. Each of the driving circuits includes a signal generation circuit that generates a modulation signal to control a light emitting intensity of the corresponding light emitting part based on the image information, a detection circuit that detects a light emitting status of the corresponding light emitting part; and a light emitting circuit that outputs a driving signal to the corresponding light emitting part to emit a light beam in accordance with the modulation signal and adjustment data obtained based on the light emitting status of at least one of the plurality of light emitting parts.

摘要翻译： 基于图像信息驱动设置在光源中以发射多个光束的多个发光部分的光源驱动装置包括被配置为驱动多个发光部分的多个驱动电路。 每个驱动电路包括：信号产生电路，产生基于图像信息来控制对应的发光部分的发光强度的调制信号;检测电路，其检测对应的发光部分的发光状态; 以及发光电路，其根据所述调制信号和基于所述多个发光部中的至少一个发光部的发光状态获得的调整数据，向对应的发光部输出驱动信号以发射光束。

公开(公告)号：US08811441B2

公开(公告)日：2014-08-19

申请号：US13024572

申请日：2011-02-10

申请人： Masaaki Ishida ,  Atsufumi Omori

发明人： Masaaki Ishida ,  Atsufumi Omori

IPC分类号： H01S3/00

CPC分类号： H04N1/113 ,  G02B26/127 ,  H01S5/0428 ,  H01S5/06216 ,  H01S5/4025 ,  H04N1/02865

摘要： A laser driving device that drives a semiconductor laser based on a light-emitting signal includes an expansion circuit that expands a pulse width of the light-emitting signal based on a known difference between the pulse width of the light-emitting signal and a lighting pulse width of the semiconductor laser when the semiconductor laser emits light according to the light-emitting signal, and a driver that outputs a driving signal to the semiconductor laser according to an output signal of the expansion circuit.

摘要翻译： 基于发光信号驱动半导体激光器的激光驱动装置包括扩展电路，该扩展电路基于发光信号的脉冲宽度与点亮脉冲之间的已知差扩大发光信号的脉冲宽度 半导体激光器根据发光信号发光时的半导体激光器的宽度;以及根据扩展电路的输出信号向半导体激光器输出驱动信号的驱动器。

公开(公告)号：US20130302052A1

公开(公告)日：2013-11-14

申请号：US13889781

申请日：2013-05-08

申请人： Muneaki IWATA ,  Kazuhiro Akatsu ,  Masaaki Ishida ,  Atsufumi Omori ,  Hayato Fujita

发明人： Muneaki IWATA ,  Kazuhiro Akatsu ,  Masaaki Ishida ,  Atsufumi Omori ,  Hayato Fujita

IPC分类号： G03G15/00

CPC分类号： G03G13/04 ,  G03G15/043 ,  G03G15/5041 ,  G03G15/5054 ,  G03G15/55

摘要： An image forming apparatus includes: a density detection unit that detects densities of an image developed by a developing unit at a plurality of positions in a main-scanning direction; a processing unit that obtains at least one of an amplitude and a phase of a first periodical density change of the image, of which cycle is a rotation cycle of a photosensitive drum, at the plurality of positions in the main-scanning direction on the basis of an output signal of the density detection unit, and corrects a drive signal for the light source so as to suppress the first periodical density change of the image at each position in the main-scanning direction on the basis of the rotation cycle of the photosensitive drum and at least one of the amplitude and the phase.

摘要翻译： 图像形成装置包括：浓度检测单元，其检测由主扫描方向上的多个位置处的显影单元显影的图像的浓度; 处理单元，其基于在主扫描方向上的多个位置处获取图像的第一周期性密度变化的幅度和相位中的至少一个，哪个周期是感光鼓的旋转周期 并且校正用于光源的驱动信号，以便基于感光体的旋转周期来抑制主扫描方向上每个位置处的图像的第一周期性密度变化 鼓和振幅和相位中的至少一个。

公开(公告)号：US08270026B2

公开(公告)日：2012-09-18

申请号：US12348618

申请日：2009-01-05

申请人： Yasuhiro Nihei ,  Masaaki Ishida ,  Atsufumi Omori ,  Dan Ozasa ,  Jun Tanabe

发明人： Yasuhiro Nihei ,  Masaaki Ishida ,  Atsufumi Omori ,  Dan Ozasa ,  Jun Tanabe

IPC分类号： G06K15/12 ,  H04N1/04

CPC分类号： H04N1/053 ,  H04N2201/0471 ,  H04N2201/04729 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04784 ,  H04N2201/04789

摘要： A write control circuit includes a first data switching circuit that sets a correspondence relationship between signals from line buffers and input signals to a delay circuitry, based on a signal from a CPU; and a second data switching circuit that sets a correspondence relationship between output signals of the delay circuitry and drive signals, based on a signal from the CPU. This enables a plurality of light emitting sections to be driven properly, regardless of a main scanning direction and an arrangement of a plurality of light spots being in any of CASE-1 to CASE-4 in an optical scanning device.

摘要翻译： 写控制电路包括：第一数据切换电路，其基于来自CPU的信号，将来自线缓冲器的信号和输入信号之间的对应关系设置为延迟电路; 以及第二数据切换电路，其基于来自CPU的信号来设置延迟电路的输出信号和驱动信号之间的对应关系。 这使得能够适当地驱动多个发光部，而不管主扫描方向和在光学扫描装置中的CASE-1至CASE-4中的任何一个的多个光点的布置。

公开(公告)号：US08005321B2

公开(公告)日：2011-08-23

申请号：US11062671

申请日：2005-02-23

申请人： Atsufumi Omori ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Dan Ozasa

发明人： Atsufumi Omori ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Dan Ozasa

IPC分类号： G06K7/00

CPC分类号： G02B26/127 ,  H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04781 ,  H04N2201/04793 ,  H04N2201/04794

摘要： A pixel clock generator that generates a pixel clock to regulate a drive timing of a scanning light source includes a data generating circuit that generates phase data based on a phase data pattern to correct an uneven scanning speed and fluctuation of scanning widths, and a pixel clock generating circuit generates a pixel clock having a long cycle based on a high-frequency clock and that performs a phase shift for the pixel clock based on the high-frequency clock. The phase pattern is set-such that difference in an amount of the phase shift between the pixel clocks adjacent to each other does not exceed a basic amount of the phase shift of the pixel clock generating circuit.

摘要翻译： 产生用于调节扫描光源的驱动定时的像素时钟的像素时钟发生器包括数据生成电路，其基于相位数据模式生成相位数据，以校正扫描速度不均匀和扫描宽度的波动，以及像素时钟 生成电路基于高频时钟生成具有长周期的像素时钟，并且基于高频时钟执行针对像素时钟的相移。 相位图案被设置为使得彼此相邻的像素时钟之间的相移量的差异不超过像素时钟产生电路的相移的基本量。

公开(公告)号：US07920305B2

公开(公告)日：2011-04-05

申请号：US11882691

申请日：2007-08-03

申请人： Masaaki Ishida ,  Yasuhiro Nihei ,  Atsufumi Omori ,  Jun Tanabe

发明人： Masaaki Ishida ,  Yasuhiro Nihei ,  Atsufumi Omori ,  Jun Tanabe

IPC分类号： H04N1/04

CPC分类号： H04N1/40037 ,  G06K15/1219 ,  G06K15/1261 ,  H04N1/0473 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/1911 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04787 ,  H04N2201/04794

摘要： An optical scanning device of the invention includes: n-odd (n≧2) light sources disposed at different positions at least in a sub scanning direction; a light source driving control part configured to control a light emitting state of the light source; and a sub-scanning pixel position detecting part configured to depict one pixel with m-odd (n≧m≧2) light sources of the n-odd (n≧2) light sources and to detect a deviation in position of the one pixel in a sub scanning direction, wherein the light source driving control part is configured to correct the deviation in position of the one pixel in the sub scanning direction at a resolution equal to or higher than a density of the pixel, depicted with the m-odd light sources, by controlling the light emitting state of the m-odd light sources on the basis of a result of detection with the sub-scanning pixel position detecting part.

摘要翻译： 本发明的光学扫描装置包括：至少在副扫描方向上设置在不同位置的n奇（n≥2）个光源; 被配置为控制所述光源的发光状态的光源驱动控制部; 以及副扫描像素位置检测部，其被配置为描绘所述n奇数（n≥2）个光源的m奇数（n≥m≥2）个光源的一个像素，并且检测所述一个像素的位置偏差 在副扫描方向上，其中光源驱动控制部被配置为以像素的密度等于或高于像素的密度来校正副扫描方向上的一个像素的位置偏移，以m奇数 基于利用副扫描像素位置检测部分的检测结果控制m个奇数光源的发光状态。

公开(公告)号：US20100045767A1

公开(公告)日：2010-02-25

申请号：US12541719

申请日：2009-08-14

申请人： Yasuhiro Nihei ,  Atsufumi Omori ,  Dan Ozasa ,  Jun Tanabe ,  Masaaki Ishida

发明人： Yasuhiro Nihei ,  Atsufumi Omori ,  Dan Ozasa ,  Jun Tanabe ,  Masaaki Ishida

IPC分类号： B41J2/435 ,  G02B27/20

CPC分类号： G03G15/326 ,  G02B26/12 ,  G03G15/0435 ,  G06K15/1219

摘要： A light-source driving device includes a high-frequency clock generating circuit that generates high-frequency clock signals of which phases are different from each other; an image-data generating circuit that generates a plurality of pieces of image data corresponding to light emitting units in accordance with image information; a write control circuit that generates a plurality of pieces of modulation data corresponding to the light emitting units based on the image data and adjusts output timing of the modulation data individually in units of time corresponding to a phase difference of the high-frequency clock signals; and a light-source driving circuit that drives the light emitting units based on a plurality of pieces of PWM data output from the write control circuit.

摘要翻译： 光源驱动装置包括：高频时钟发生电路，其产生相位彼此不同的高频时钟信号; 图像数据生成电路，根据图像信息生成与发光单元对应的多个图像数据; 写入控制电路，其基于图像数据生成与发光单元对应的多个调制数据，并且以对应于高频时钟信号的相位差的时间为单位分别调整调制数据的输出定时; 以及基于从写入控制电路输出的多条PWM数据驱动发光单元的光源驱动电路。

公开(公告)号：US20090091805A1

公开(公告)日：2009-04-09

申请号：US11913558

申请日：2006-08-30

申请人： Jun Tanabe ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Atsufumi Omori

发明人： Jun Tanabe ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Atsufumi Omori

IPC分类号： H04N1/04

CPC分类号： G02B26/123 ,  B41J2/455 ,  B41J2/473 ,  H04N1/1135 ,  H04N1/40031

摘要： A light scanning apparatus having plural light sources includes a light source control unit configured to control the light sources to form L (L≧2) light beam arrays aligned in a sub scanning direction each of which L light beam arrays are formed by causing M ((N−1)≧M≧1) light sources out of N (N≧2) light sources assigned to each of the L light beam arrays to emit light as M light emitting sources, wherein each of the L light beam arrays forms a pixel and a total of L pixels aligned in the sub scanning direction are formed.

摘要翻译： 具有多个光源的光扫描装置包括光源控制单元，被配置为控制光源以形成沿副扫描方向排列的L（L> = 2）个光束阵列，每个L光束阵列通过使M （N-1）> = M> = 1）分配给每个L光束阵列的N（N> = 2）个光源中的光源作为M个发光源发光，其中L个 光束阵列形成像素，并且形成在副扫描方向上排列的总共L个像素。

公开(公告)号：US20080298842A1

公开(公告)日：2008-12-04

申请号：US12126265

申请日：2008-05-23

申请人： Masaaki Ishida ,  Atsufumi Omori ,  Jun Tanabe

发明人： Masaaki Ishida ,  Atsufumi Omori ,  Jun Tanabe

IPC分类号： G03G15/04

CPC分类号： G03G15/326 ,  G03G15/0435 ,  G03G2215/0404 ,  G03G2215/0407

摘要： A light source driver mounted on a rectangular-shaped substrate includes a plurality of output parts that output driving signals to drive a plurality of light-emitting bodies. The plurality of output parts are disposed in a vicinity of the two sides of the substrate, the two sides of the substrate forming a corner of the substrate.

摘要翻译： 安装在矩形基板上的光源驱动器包括输出驱动信号以驱动多个发光体的多个输出部。 多个输出部分设置在基板的两侧附近，基板的两侧形成基板的角部。

公开(公告)号：US07400210B2

公开(公告)日：2008-07-15

申请号：US11608352

申请日：2006-12-08

申请人： Masaaki Ishida ,  Yasuhiro Nihei ,  Atsufumi Omori ,  Dan Ozasa

发明人： Masaaki Ishida ,  Yasuhiro Nihei ,  Atsufumi Omori ,  Dan Ozasa

IPC分类号： H03B5/24 ,  H03L7/06 ,  H03L7/099

CPC分类号： H03L7/0812 ,  H03K3/0315 ,  H03K3/0322 ,  H03L7/0891 ,  H03L7/0995 ,  H03L7/18

摘要： An oscillation frequency control part includes a voltage-to-current converting circuit converting an input voltage to a current having a value corresponding to the input voltage, and outputting a current in proportion to the current obtained from the voltage-to-current converting circuit. An oscillating circuit part includes a ring oscillator, wherein a current in proportion to the output current of the oscillation frequency control part flows through the ring oscillator so that the oscillation frequency in the ring oscillator is controlled by the output current of the oscillation frequency control part. The voltage-to-current converting circuit has linear voltage-to-current conversion characteristics in a predetermined range of the input voltage including a ground potential.

摘要翻译： 振荡频率控制部分包括将输入电压转换为具有与输入电压相对应的值的电流的电压 - 电流转换电路，并且与从电压 - 电流转换电路获得的电流成比例地输出电流。 振荡电路部分包括环形振荡器，其中与振荡频率控制部分的输出电流成比例的电流流过环形振荡器，使得环形振荡器中的振荡频率由振荡频率控制部分的输出电流控制 。 电压 - 电流转换电路在包括接地电位的输入电压的预定范围内具有线性的电压 - 电流转换特性。