公开(公告)号：US07193957B2

公开(公告)日：2007-03-20

申请号：US11213829

申请日：2005-08-30

申请人： Naruhiro Masui ,  Hidetoshi Ema

发明人： Naruhiro Masui ,  Hidetoshi Ema

IPC分类号： G11B7/00

CPC分类号： G11B7/126 ,  G11B7/0062 ,  G11B7/1263 ,  G11B11/1053 ,  H01S5/0427 ,  H01S5/0683

摘要： A light source drive which modulates a light source so as to cause the same to emit a light, includes: a superposition current generation part which generates a superposition current approximately corresponding to a charging/discharging current needed for a capacitance occurring in parallel to the light source for a predetermined time period near at least one of a rising-up part and a decaying-down part of a waveform of a drive current for the light source; and an addition/subtraction part which adds to or subtracts from the drive current the superposition current generated by the superposition current generation part.

摘要翻译： 调制光源以使其发光的光源驱动器包括：叠加电流产生部分，其产生大致对应于与光并行发生的电容所需的充电/放电电流的叠加电流 源于光源的驱动电流的波形的上升部分和衰减部分中的至少一个附近的预定时间段; 以及加法/减法部分，其从驱动电流增加或减去由叠加电流产生部分产生的叠加电流。

公开(公告)号：US5325160A

公开(公告)日：1994-06-28

申请号：US935561

申请日：1992-08-26

申请人： Susumu Imakawa ,  Hidetoshi Ema

发明人： Susumu Imakawa ,  Hidetoshi Ema

IPC分类号： H04N1/40 ,  H04N1/405 ,  G03G15/048 ,  G03G15/32

CPC分类号： H04N1/40025 ,  H04N1/4056

摘要： A half tone recording method has the steps of representing one picture element of image information including inputted density information by a matrix composed of K.times.L small pixels where K designates the number of small pixels in a main scanning direction and L designates the number of small pixels in a sub-scanning direction and numbers K and L are integers equal to or greater than one and are not simultaneously set to one; freely selecting a light emitting pulse width of a light source within the one pixel in a divisional pulse unit obtained by dividing a pulse width T with respect to one micro pixel; freely selecting the light intensity of the light source about the divisional pulse at plural values of m kinds; increasing the light intensity about the divisional pulse in a certain micro pixel from a minimum intensity value to a maximum intensity value; and increasing the light intensity from the minimum intensity value about a divisional pulse in the micro pixel adjacent in the sub-scanning direction to the divisional pulse providing the maximum light intensity. A light source device for writing is used in execution of the half tone recording method.

摘要翻译： 半色调记录方法具有如下步骤：通过由K×L个小像素组成的矩阵表示包括输入的浓度信息的图像信息的一个像素，其中K表示主扫描方向上的小像素的数量，L表示小像素的数量 子扫描方向和数字K和L是等于或大于1的整数，并不同时设置为1; 通过将脉冲宽度T相对于一个微像素分割而得到的分割脉冲单位自由选择一个像素内的光源的发光脉冲宽度; 以多种m种方式自由选择关于分割脉冲的光源的光强度; 将某个微像素中的分割脉冲的光强度从最小强度值增加到最大强度值; 并且将从副扫描方向相邻的微像素中的分割脉冲的最小强度值增加到提供最大光强度的分割脉冲的光强度。 在执行半色调记录方法时使用用于写入的光源装置。

公开(公告)号：US08243865B2

公开(公告)日：2012-08-14

申请号：US11763663

申请日：2007-06-15

申请人： Nobunari Tsukamoto ,  Hidetoshi Ema

发明人： Nobunari Tsukamoto ,  Hidetoshi Ema

IPC分类号： H04L7/00

CPC分类号： H03M7/3048

摘要： A disclosed data processing apparatus includes: a binarization unit binarizing input data based on a threshold voltage; a capture unit capturing data from a binary output binarized by the binarization unit; a duty cycle detection unit detecting a duty cycle of the binary output; and a control unit controlling a level of the input data based on the duty cycle detected by the duty cycle detection unit.

摘要翻译： 公开的数据处理装置包括：二值化单元，基于阈值电压二值化输入数据; 捕获单元，从由二值化单元二值化的二进制输出中获取数据; 占空比检测单元，检测二进制输出的占空比; 以及控制单元，其基于由占空比检测单元检测到的占空比来控制输入数据的电平。

公开(公告)号：US20070297548A1

公开(公告)日：2007-12-27

申请号：US11763663

申请日：2007-06-15

申请人： Nobunari Tsukamoto ,  Hidetoshi Ema

发明人： Nobunari Tsukamoto ,  Hidetoshi Ema

IPC分类号： H04L7/00

CPC分类号： H03M7/3048

摘要： A disclosed data processing apparatus includes: a binarization unit binarizing input data based on a threshold voltage; a capture unit capturing data from a binary output binarized by the binarization unit; a duty cycle detection unit detecting a duty cycle of the binary output; and a control unit controlling a level of the input data based on the duty cycle detected by the duty cycle detection unit.

摘要翻译： 公开的数据处理装置包括：二值化单元，基于阈值电压二值化输入数据; 捕获单元，从由二值化单元二值化的二进制输出中获取数据; 占空比检测单元，检测二进制输出的占空比; 以及控制单元，其基于由占空比检测单元检测到的占空比来控制输入数据的电平。

公开(公告)号：US07050080B2

公开(公告)日：2006-05-23

申请号：US09873256

申请日：2001-06-05

申请人： Hidetoshi Ema ,  Akihisa Itabashi

发明人： Hidetoshi Ema ,  Akihisa Itabashi

IPC分类号： B41J2/435

CPC分类号： H04N1/053 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04772 ,  H04N2201/04781 ,  H04N2201/04794

摘要： In an image forming apparatus which uses a semiconductor laser as a light source, a semiconductor laser is controlled by adjustment of an image write-in clock, and a highly accurate scanning position alignment is performed with a simple structure. An optical unit scans a rotational photo conductor by a laser light output by a semiconductor laser. A photodetector detects the laser light output by the semiconductor laser at a predetermined position. An electrostatic latent image is formed by scanning the rotational photo conductor based on the laser light detected by the photodetector. By dividing a clock output from a high-frequency clock generation circuit, an image clock which synchronized with the output of the photodetector is generated, and the phase of the image clock is changed.

公开(公告)号：US5784091A

公开(公告)日：1998-07-21

申请号：US862326

申请日：1997-05-23

申请人： Hidetoshi Ema ,  Masaaki Ishida

发明人： Hidetoshi Ema ,  Masaaki Ishida

IPC分类号： B41J2/44 ,  G02F3/00 ,  G06K15/12 ,  H01S5/042 ,  H01S5/068 ,  H04N1/40 ,  B41J2/385 ,  G03G13/04 ,  H04N1/21

CPC分类号： G06K15/1209 ,  H04N1/40037 ,  H04N1/40043

摘要： A digital ASIC inputs pixel data thereto and an analog ASIC inputs the output signal of the digital ASIC thereto. A combination of the digital ASIC and the analog ASIC controls a semiconductor laser so as to pulse-width-modulate and amplitude-modulate the light emitted by the semiconductor laser that may be pulse-width-modulated and amplitude-modulated. The digital ASIC comprises a reference pulse generator having delay time control unit and a pulse width generator for generating a plurality of different pulse widths using pulses having a plurality of phases generated by the reference pulse generator. The analog ASIC comprises control/modulation unit for controlling the semiconductor laser so as to pulse-width-modulate and amplitude-modulate the light emitted by the semiconductor laser using the plurality of different pulse widths generated by the pulse width generator. The reference pulse generator comprises an oscillator comprising combined multiple delay-time control unit, and control unit for controlling the oscillator so as to make the frequency supplied by the oscillator identical to the clock of the pixel data.

摘要翻译： 数字ASIC输入像素数据，模拟ASIC输入数字ASIC的输出信号。 数字ASIC和模拟ASIC的组合控制半导体激光器，以对脉冲宽度调制和幅度调制的半导体激光器发射的光进行脉宽调制和幅度调制。 数字ASIC包括具有延迟时间控制单元的参考脉冲发生器和脉冲宽度发生器，用于使用具有由参考脉冲发生器产生的多个相位的脉冲来产生多个不同的脉冲宽度。 模拟ASIC包括用于控制半导体激光器的控制/调制单元，以便利用由脉冲宽度发生器产生的多个不同的脉冲宽度来对半导体激光器发射的光进行脉宽调制和幅度调制。 参考脉冲发生器包括一个振荡器，它包括组合的多个延迟时间控制单元，以及控制单元，用于控制振荡器，以使由振荡器提供的频率与像素数据的时钟相同。

公开(公告)号：US5138623A

公开(公告)日：1992-08-11

申请号：US663158

申请日：1991-03-01

申请人： Hidetoshi Ema ,  Masaaki Ishida

发明人： Hidetoshi Ema ,  Masaaki Ishida

IPC分类号： H01S5/042 ,  H01S5/0683

CPC分类号： H01S5/0683 ,  H01S5/042

摘要： A semiconductor laser control device that comprises a light receiving photodiode for detecting light emitted from a semiconductor laser element to be controlled and a current amplifier circuit. To the amplifier circuit, the light receiving photodiode and a light emitting command signal are connected so as to apply first forward current to the laser element in response to difference between the light detection signal and an input signal corresponding to the light emitting command signal so that a negative feed back circuit is constituted from the light receiving photodiode and the amplifier circuit. The device further comprises a current applying circuit for applying second forward current to the laser element in conjunction with said first forward current and a correction circuit for correcting the second forward current.

摘要翻译： 一种半导体激光器控制装置，包括用于检测从要被控制的半导体激光元件发射的光的光接收光电二极管和电流放大器电路。 对于放大器电路，光接收光电二极管和发光指令信号被连接，以响应于光检测信号和对应于发光指令信号的输入信号之间的差异，向激光元件施加第一正向电流，使得 负反馈电路由光接收光电二极管和放大电路构成。 该装置还包括电流施加电路，用于结合所述第一正向电流向激光元件施加第二正向电流，以及用于校正第二正向电流的校正电路。

公开(公告)号：US08194780B2

公开(公告)日：2012-06-05

申请号：US12222523

申请日：2008-08-11

申请人： Nobunari Tsukamoto ,  Hidetoshi Ema

发明人： Nobunari Tsukamoto ,  Hidetoshi Ema

IPC分类号： H04B14/06

CPC分类号： G06F13/4291

摘要： A differential signal output device is disclosed that outputs transmission data as a differential signal. The device includes a first differential signal generation circuit that amplifies a signal representing the transmission data and generates the differential signal from the amplified signal; a dummy data generation circuit that is synchronized with a reference clock of the transmission data and generates dummy data that change only in a bit where the transmission data do not change; and a second differential signal generation circuit that amplifies a signal representing the dummy data and generates another differential signal from the amplified signal.

摘要翻译： 公开了一种输出传输数据作为差分信号的差分信号输出装置。 该装置包括：第一差分信号生成电路，其放大表示发送数据的信号，并从放大信号生成差分信号; 与发送数据的基准时钟同步的伪数据生成电路，生成仅在发送数据不发生变化的比特中变化的伪数据; 以及第二差分信号生成电路，其对表示所述虚拟数据的信号进行放大，并从所述放大信号生成另一差分信号。

公开(公告)号：US08023605B2

公开(公告)日：2011-09-20

申请号：US11845416

申请日：2007-08-27

申请人： Nobunari Tsukamoto ,  Hidetoshi Ema

发明人： Nobunari Tsukamoto ,  Hidetoshi Ema

IPC分类号： H04L7/00

CPC分类号： H04L7/0338

摘要： A multiphase delay unit causes different delay times to a reference clock to generate a multiphase clock with different phases. A multiphase sampling unit samples the input signal using the multiphase clock, and outputs multiphase sampling data. A phase selecting unit detects a phase relation of the multiphase clock using the multiphase sampling data, and selects output data from the multiphase sampling data based on a result of detecting the phase relation.

摘要翻译： 多相延迟单元对参考时钟产生不同的延迟时间以产生具有不同相位的多相时钟。 多相采样单元使用多相时钟采样输入信号，并输出多相采样数据。 相位选择单元使用多相采样数据检测多相时钟的相位关系，并且基于检测相位关系的结果从多相采样数据中选择输出数据。

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。