公开(公告)号：US20050219354A1

公开(公告)日：2005-10-06

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： B41J2/44 ,  B41J2/435 ,  B41J2/47 ,  G02B26/10 ,  G02B26/12 ,  H04N1/036 ,  H04N1/053 ,  H04N1/113 ,  H04N1/12

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：US20050213623A1

公开(公告)日：2005-09-29

申请号：US11079381

申请日：2005-03-15

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

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

IPC分类号： B41J2/44 ,  H01L21/822 ,  H01L27/04 ,  H01S3/00 ,  H01S3/10 ,  H01S5/042 ,  H01S5/062 ,  H04N1/036 ,  H04N1/40

CPC分类号： H04N1/40037 ,  H01S5/0427

摘要： A semiconductor laser modulation signal is generated for modulating a semiconductor laser. The semiconductor laser is driven based on the semiconductor laser modulation signal. An output impedance of a semiconductor laser modulation signal generating unit and an input impedance of a semiconductor laser driving unit are corrected. The semiconductor laser modulation signal is transmitted as a low amplitude differential signal, from the semiconductor laser modulation signal generating unit to the semiconductor laser driving unit.

摘要翻译： 产生用于调制半导体激光器的半导体激光调制信号。 基于半导体激光调制信号驱动半导体激光器。 校正半导体激光调制信号生成部的输出阻抗和半导体激光驱动部的输入阻抗。 半导体激光调制信号从半导体激光调制信号发生单元传输到半导体激光器驱动单元作为低振幅差分信号。

公开(公告)号：US06917639B2

公开(公告)日：2005-07-12

申请号：US10214559

申请日：2002-08-09

申请人： Masaaki Ishida ,  Hidetoshi Ema ,  Yasuhiro Nihei ,  Hiroaki Kyougoku ,  Atsufumi Omori

发明人： Masaaki Ishida ,  Hidetoshi Ema ,  Yasuhiro Nihei ,  Hiroaki Kyougoku ,  Atsufumi Omori

IPC分类号： H01S5/042 ,  H01S5/0683 ,  H01S3/00 ,  H01S3/13

CPC分类号： H01S5/042 ,  H01S5/0427 ,  H01S5/0683

摘要： A laser driver circuit includes a biasing current source, a threshold current source, and a modulation current source, wherein the threshold current source produces a threshold current in response to an input signal with an interval exceeding an interval of a modulation current such that said interval of the threshold current includes the interval of said modulation current. The laser driver circuit drives the laser diode by a sum of a continuous bias current, the threshold current and the modulation current.

摘要翻译： 激光驱动器电路包括偏置电流源，阈值电流源和调制电流源，其中阈值电流源响应输入信号产生阈值电流，间隔超过调制电流的间隔，使得所述间隔 阈值电流包括所述调制电流的间隔。 激光驱动电路通过连续偏置电流，阈值电流和调制电流的和来驱动激光二极管。

公开(公告)号：US20050146596A1

公开(公告)日：2005-07-07

申请号：US11030419

申请日：2005-01-07

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

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

IPC分类号： B41J2/44 ,  B41J2/47 ,  G02B26/10 ,  G06K15/12 ,  H04N1/036 ,  H04N1/053 ,  H04N1/113 ,  H04N1/12 ,  H04N1/405

CPC分类号： H04N1/053 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04784 ,  H04N2201/04794

摘要： A pixel clock and pulse-modulation-signal generating device includes a high-frequency-clock generating unit that generates a high-frequency clock; a modulation-data generating unit that generates, based on pixel control data that specifies a pixel length and image data, phase data that indicates a transition timing of a pixel clock and modulation data that indicates a desired bit pattern that corresponds to the image data; a pixel-clock generating unit that generates a pixel clock based on the high-frequency clock, the phase data, and a horizontal synchronization signal; and a serial-modulation-signal generating unit that inputs the modulation data, and outputs a pulse modulation signal in a serial pulse string based on the high-frequency clock.

摘要翻译： 像素时钟和脉冲调制信号发生装置包括产生高频时钟的高频时钟产生单元; 调制数据生成单元，其基于指定像素长度和图像数据的像素控制数据生成指示像素时钟的转移定时的相位数据和表示与图像数据对应的期望位图案的调制数据; 像素时钟生成单元，其基于高频时钟，相位数据和水平同步信号生成像素时钟; 以及串行调制信号生成单元，其输入调制数据，并且基于高频时钟输出串行脉冲串中的脉冲调制信号。

公开(公告)号：US20050099489A1

公开(公告)日：2005-05-12

申请号：US10953372

申请日：2004-09-30

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

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

IPC分类号： B41J2/44 ,  G02B26/10 ,  G02B26/12 ,  G06K15/12 ,  H04N1/036 ,  H04N1/113 ,  B41J2/435

CPC分类号： G02B26/127 ,  G06K15/1219

摘要： In a pixel clock creation method and device, a high frequency clock is created. A scanning time needed to scan a predetermined scanning length is detected in accuracy of half a period of the high frequency clock to output a detection value indicating the detected scanning time. The detection value and a predetermined target value are compared to output a comparison result. A phase data is created based on the comparison result. A pixel clock whose phase is controlled based on both the high frequency clock and the phase data is created.

摘要翻译： 在像素时钟创建方法和装置中，产生高频时钟。 以高频时钟的半周期的精度检测扫描预定扫描长度所需的扫描时间，以输出指示检测到的扫描时间的检测值。 将检测值和预定目标值进行比较以输出比较结果。 基于比较结果创建相位数据。 创建基于高频时钟和相位数据来控制相位的像素时钟。

公开(公告)号：US10324397B2

公开(公告)日：2019-06-18

申请号：US15203081

申请日：2016-07-06

申请人： Muneaki Iwata ,  Masaaki Ishida ,  Atsufumi Omori ,  Hayato Fujita ,  Takefumi Takizawa

发明人： Muneaki Iwata ,  Masaaki Ishida ,  Atsufumi Omori ,  Hayato Fujita ,  Takefumi Takizawa

IPC分类号： G03G15/00 ,  G03G15/043

摘要： An image forming apparatus includes a photoconductor drum, a latent-image forming device, a developing device, a density detecting device, and a processing device. The density detecting device is configured to detect densities at a plurality of positions in a main-scanning direction on a developed image. The processing device is configured to acquire at least two light-amount correction tables respectively associated with at least two positions of the plurality of positions in the main-scanning direction on the developed image, the light-amount correction tables being for reducing density variations in a sub-scanning direction at the at least two positions, and correct, for each scan, a set point for setting an amount of light of a light source based on a difference in corresponding correction data between two light-amount correction tables respectively associated with two adjacent positions of the at least two light-amount correction tables.

公开(公告)号：US20160274521A1

公开(公告)日：2016-09-22

申请号：US15067660

申请日：2016-03-11

申请人： Muneaki IWATA ,  Masaaki ISHIDA ,  Atsufumi OMORI ,  Naoto WATANABE ,  Hayato FUJITA

发明人： Muneaki IWATA ,  Masaaki ISHIDA ,  Atsufumi OMORI ,  Naoto WATANABE ,  Hayato FUJITA

IPC分类号： G03G15/00 ,  G03G15/043

CPC分类号： G03G15/5041 ,  G03G15/04072 ,  G03G15/043 ,  G03G15/5054 ,  G03G2215/0132 ,  G03G2215/0164

摘要： An image forming apparatus includes: a photoconductor drum; an optical scanning device that drives a light source to scan a surface of the photoconductor drum and form a latent image on the surface; a developing device that develops the latent image; and a density detector to detect density variation of an image in a rotation direction of the photoconductor drum, the image being developed by the developing device. The optical scanning device includes a processing device that is capable of correcting a driving signal for driving the light source on a basis of an output signal of the density detector to adjust at least either one of a correction period and a correction strength of correction data for the driving signal for a rotation period of the photoconductor drum.

摘要翻译： 一种成像设备包括：感光鼓; 光学扫描装置，其驱动光源以扫描感光鼓的表面并在表面上形成潜像; 显影装置，用于显影潜像; 以及密度检测器，用于检测感光鼓的旋转方向上的图像的浓度变化，该图像由显影装置显影。 光学扫描装置包括处理装置，该处理装置能够根据密度检测器的输出信号校正用于驱动光源的驱动信号，以调整校正周期和校正数据的校正强度中的至少一个， 感光鼓的旋转周期的驱动信号。

公开(公告)号：US08995486B2

公开(公告)日：2015-03-31

申请号：US12881482

申请日：2010-09-14

申请人： Atsufumi Omori ,  Masaaki Ishida

发明人： Atsufumi Omori ,  Masaaki Ishida

IPC分类号： H01S3/00 ,  H01S5/042 ,  H01S5/40

CPC分类号： H01S5/0427 ,  H01S5/4025

摘要： There provided is a semiconductor laser control device which including plural light sources that are configured with eight or more semiconductor laser elements, a one detecting section that detects a light power of the light sources, a light power control unit that compares a signal according to a light power detected by the detecting section with a control signal corresponding to a predetermined light power to control a current supplied to the light sources, and a voltage clamp circuit that functions as an overvoltage preventing means for the detecting section when turning on each of the light sources to perform light power control.

摘要翻译： 提供了一种半导体激光控制装置，其包括配置有八个或更多个半导体激光元件的多个光源，检测光源的光功率的一个检测部分，将功率控制单元 由检测部分检测到的光功率具有对应于预定光功率的控制信号以控制提供给光源的电流;以及电压钳位电路，其用作当开启每个光时用于检测部分的过电压防止装置 来源进行光功率控制。

公开(公告)号：US08982422B2

公开(公告)日：2015-03-17

申请号：US14269332

申请日：2014-05-05

申请人： Muneaki Iwata ,  Masaaki Ishida ,  Atsufumi Omori ,  Hayato Fujita

发明人： Muneaki Iwata ,  Masaaki Ishida ,  Atsufumi Omori ,  Hayato Fujita

IPC分类号： H04N1/407 ,  G03G15/04

CPC分类号： G03G15/04027 ,  H04N1/40037 ,  H04N1/4058 ,  H04N1/4092

摘要： An image forming apparatus for forming an image in accordance with light to be emitted from a light source includes: a digital half-toning unit configured to convert a uniform-pixel-value region of image data to a parallel-line pattern formed with a plurality of parallel lines extending obliquely with respect to a direction, in which pixels are arrayed, thereby expressing each gray level of the image data as an area percentage; a modulated-signal generating unit configured to generate a modulated signal by modulating the converted image data with a clock signal; a light-source driving unit configured to drive the light source according to the modulated signal; and an edge control unit configured to narrow a to-be-illuminated region, which is to be illuminated by the light from the light source, in each of edge neighborhoods of the lines constituting the parallel-line pattern, while increasing intensity of the light.

摘要翻译： 根据从光源发出的光形成图像的图像形成装置包括：数字半色调单元，被配置为将图像数据的均匀像素值区域转换为形成有多个的平行线图案 相对于其中排列像素的方向倾斜地延伸的平行线，从而将图像数据的每个灰度级表示为面积百分比; 调制信号生成单元，被配置为通过用时钟信号调制转换的图像数据来生成调制信号; 光源驱动单元，被配置为根据调制信号驱动光源; 以及边缘控制单元，被配置为在构成平行线图案的线的每个边缘邻域中缩小要被来自光源的光照明的被照明区域，同时增加光的强度 。

公开(公告)号：US20140347708A1

公开(公告)日：2014-11-27

申请号：US14262902

申请日：2014-04-28

申请人： Atsufumi OMORI ,  Muneaki IWATA ,  Hayato FUJITA

发明人： Atsufumi OMORI ,  Muneaki IWATA ,  Hayato FUJITA

IPC分类号： H04N1/00 ,  H04N1/113

CPC分类号： H04N1/00819 ,  H04N1/113 ,  H04N1/40056 ,  H04N2201/0458

摘要： A light source driving circuit that drives a light source includes a driving electric current generator that generates a driving electric current including a predetermined electric current, a first auxiliary current, and a second auxiliary current; and a controller that sets values of the first and second auxiliary currents by using first and second lighting pattern signals, wherein each of the first and second lighting pattern signals is for controlling supply of the predetermined electric current to the light source. After setting a first value of the first auxiliary current, a second value of the second auxiliary current is set by using the second lighting pattern signal that defines a time period for stopping supply of the predetermined electric current to be shorter than a time period for stopping the supply of the predetermined electric current that is defined by the first lighting pattern signal.

摘要翻译： 驱动光源的光源驱动电路包括产生包括预定电流，第一辅助电流和第二辅助电流的驱动电流的驱动电流发生器; 以及控制器，其通过使用第一和第二照明模式信号来设定第一和第二辅助电流的值，其中第一和第二照明模式信号中的每一个用于控制向光源的预定电流的供应。 在设置了第一辅助电流的第一值之后，通过使用限定用于停止预定电流的供给的时间段的第二点亮模式信号来设定第二辅助电流的第二值短于停止的时间段 提供由第一照明模式信号限定的预定电流。