公开(公告)号：JP2011044603A

公开(公告)日：2011-03-03

申请号：JP2009192349

申请日：2009-08-21

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： KAMAYA TOMOHIKO

IPC: H01S5/0683 ,  H01S5/062

CPC classification number: H01S5/4025 ,  H01S5/0427 ,  H01S5/06832 ,  H04N9/3129

Abstract: PROBLEM TO BE SOLVED: To provide a multibeam laser light quantity control circuit for accurate APC for a long time. SOLUTION: The multibeam laser light quantity control circuit includes multibeam laser light quantity control circuits 15, 16, ..., which include: a light receiving element for receiving a light quantity output from each semiconductor laser to control a light quantity of semiconductor laser arrays 5, including a plurality of semiconductor lasers LD1, LD2; an automatic light quantity control circuit (APC control circuit) for controlling, in response to automatic light quantity control execution signals (APC execution signals) which are input, to set a light emission quantity output from the corresponding laser to be a predetermined light emission quantity according to the output of the light receiving element; and each APC execution signal input terminal to which a number of the automatic light quantity control execution signals depending on the automatic light quantity control circuit are correspondingly input. When the plurality of APC execution signals input to the respective APC signal input terminals overlap in time, one of the automatic light quantity control circuits is determined to preferentially operate depending on the input timing. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种用于长时间精确APC的多光束激光量控制电路。 解决方案：多光束激光量控制电路包括多光束激光量控制电路15,16，...，其包括：光接收元件，用于接收从每个半导体激光器输出的光量，以控制光量 包括多个半导体激光器LD1，LD2的半导体激光器阵列5; 一种自动光量控制电路（APC控制电路），用于响应于输入的自动光量控制执行信号（APC执行信号），将从相应的激光器输出的发光量设定为预定的发光量 根据光接收元件的输出; 并且相应地输入根据自动光量控制电路的多个自动光量控制执行信号的每个APC执行信号输入端。 当输入到各个APC信号输入端子的多个APC执行信号及时重叠时，根据输入定时，自动光量控制电路之一被确定为优先操作。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2009135281A

公开(公告)日：2009-06-18

申请号：JP2007310418

申请日：2007-11-30

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： KAMAYA TOMOHIKO

IPC: H01S5/062

CPC classification number: H01S5/042

Abstract: PROBLEM TO BE SOLVED: To provide a semiconductor device capable of changing the circuit configuration in accordance with independent characteristic of semiconductor laser, and to provide a semiconductor laser driving device using the semiconductor device, and an image forming apparatus.
SOLUTION: The semiconductor device includes a switching current setting terminal RSW; a switching current control terminal VSW; a switching current generator circuit 10 which generates a switching current Isw such that voltages input to the terminals RSW and VSW are equal to each other; a bias current setting terminal RBI; a bias current control terminal VBI; a bias current generator circuit 20 which generates a bias current Ibi such that voltages input to the terminals RBI and VBI equal to each other; a memory circuit 30 which stores a drive current value corresponding to a predetermined amount of light; an APC output terminal APCO; and a current adding circuit 52 which adds the switching current Isw and the bias current Ibi to generate a drive current.
COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 解决的问题：提供能够根据半导体激光器的独立特性改变电路结构的半导体器件，并提供使用半导体器件的半导体激光器驱动器件和图像形成设备。

解决方案：半导体器件包括开关电流设置端子RSW; 开关电流控制端子VSW; 开关电流产生电路10，其产生开关电流Isw，使得输入到端子RSW和VSW的电压彼此相等; 偏置电流设定端子RBI; 偏置电流控制端子VBI; 偏置电流发生器电路20，其产生偏置电流Ibi，使得输入到端子RBI和VBI的电压彼此相等; 存储与预定量的光对应的驱动电流值的存储电路30; APC输出端子APCO; 以及将开关电流Isw和偏置电流Ibi相加以产生驱动电流的电流加法电路52。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2013099165A

公开(公告)日：2013-05-20

申请号：JP2011241333

申请日：2011-11-02

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： SUZUKI HARUYUKI ,  SHIMIZU FUMIHIRO ,  KAMAYA TOMOHIKO ,  FURUSE KATSUHISA

IPC: H02P6/16 ,  G01D5/244

Abstract: PROBLEM TO BE SOLVED: To provide a detection device and a drive device capable of being downsized.SOLUTION: A detection device has: generation means generating L (L is an integer of two or more) first sinusoidal wave signals with different phases from each other depending on a rotation angle of a motor; calculation means performing an arithmetic operation using the respective L first sinusoidal wave signals to generate M (M is an integer satisfying M>L) second sinusoidal wave signals; comparison means compares respective amplitude values of the M second sinusoidal wave signals with a preliminarily-defined threshold to generate N (N is an integer satisfying N≥M) comparison result signals indicating comparison results; and detection means generating a detection signal for detecting at least one of a rotation position of the motor and a rotation speed of the motor, on the basis of the N comparison result signals generated by the comparison means.

Abstract translation: 要解决的问题：提供能够被小型化的检测装置和驱动装置。 检测装置具有：产生装置，根据电动机的旋转角度，产生具有彼此不同相位的L（L为2以上的整数）的第一正弦波信号; 计算装置使用各自的L个第一正弦波信号执行算术运算，以产生M（M是满足M> L的整数）第二正弦波信号; 比较装置将M个第二正弦波信号的各个振幅值与预先定义的阈值进行比较，以产生指示比较结果的N（N是满足N≥M的整数）比较结果信号; 以及检测装置，根据比较装置生成的N个比较结果信号，生成用于检测电动机的旋转位置和电动机的转速中的至少一个的检测信号。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2013099023A

公开(公告)日：2013-05-20

申请号：JP2011237171

申请日：2011-10-28

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： KAMAYA TOMOHIKO ,  SUZUKI HARUYUKI ,  SHIMIZU FUMIHIRO ,  FURUSE KATSUHISA

IPC: H02P6/16 ,  G01D5/244

CPC classification number: H02P6/16

Abstract: PROBLEM TO BE SOLVED: To make use of a motor commutation drive magnetic sensor to perform more phase detection than otherwise possible, without using an expensive optical encoder.SOLUTION: In a motor drive control device, a phase information signal to control motor drive is generated on the basis of a plurality of sensor signals having a signal level corresponding to the rotation position of the rotor of a motor. The plurality of sensor signals are compared with a plurality of prescribed threshold levels to detect a phase, and a first phase information signal indicating the detected phase is output. The plurality of sensor signals are compared with each other to detect a phase, and a second phase information signal indicating the detected signal is output. The detected phases included in the first and the second phase information signals are divided into a plurality of prescribed phase sections. In the plurality of prescribed phase sections, one of a plurality of sensor signals is selected, and detection is made to see that the signal level of the selected sensor signal has reached a prescribed threshold level corresponding to a prescribed phase of the rotor, whereby a phase information signal indicating the detected phase is output.

Abstract translation: 要解决的问题：为了利用电动机换向驱动磁传感器来执行比其他可能的更多的相位检测，而不使用昂贵的光学编码器。 解决方案：在电动机驱动控制装置中，基于具有与电动机的转子的旋转位置对应的信号电平的多个传感器信号，生成用于控制电动机驱动的相位信息信号。 将多个传感器信号与多个规定的阈值电平进行比较以检测相位，并且输出指示检测到的相位的第一相位信息信号。 将多个传感器信号彼此进行比较以检测相位，并输出指示检测信号的第二相位信息信号。 包括在第一和第二相位信息信号中的检测相被分成多个规定的相位部分。 在多个规定的相位段中，选择多个传感器信号中的一个，并且检测出所选择的传感器信号的信号电平已经达到与转子的规定相位对应的规定阈值电平，由此 输出指示检测相位的相位信息信号。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2011181682A

公开(公告)日：2011-09-15

申请号：JP2010044411

申请日：2010-03-01

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： KAMAYA TOMOHIKO

IPC: H01S5/0683 ,  B41J2/44 ,  H04N1/113

CPC classification number: H01S5/4025 ,  H01S5/0683

Abstract: PROBLEM TO BE SOLVED: To provide a semiconductor laser drive circuit that can easily switch between a single-beam laser driving mode and a multi-beam laser driving mode.
SOLUTION: In the semiconductor laser drive circuit driven by automatic light quantity control APC (Automatic Power Control) each laser diode of a multi-beam laser system in which one photodiode is provided for a plurality of the laser diodes, when a detecting means detects the photodiode for the multi-beam laser system being not connected, a detecting means turns off the switches and connects the photodiode for a single-beam laser system to individual photodiode connection terminals to constitute the single-beam laser driving mode.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供能够容易地在单束激光驱动模式和多​​光束激光驱动模式之间切换的半导体激光器驱动电路。 解决方案：在通过自动光量控制APC（自动功率控制）驱动的半导体激光驱动电路中，对于多个激光二极管提供一个光电二极管的多光束激光系统的每个激光二极管，当检测 装置检测多光束激光器系统未连接的光电二极管，检测装置关闭开关并将用于单束激光系统的光电二极管连接到各个光电二极管连接端，构成单光束激光驱动模式。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2009164193A

公开(公告)日：2009-07-23

申请号：JP2007339677

申请日：2007-12-28

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： KAMAYA TOMOHIKO

IPC: H01S5/042

CPC classification number: H01S5/042 ,  H01S5/0021 ,  H01S5/0683

Abstract: PROBLEM TO BE SOLVED: To provide a semiconductor laser drive unit which has a small circuit scale only by having the minimum necessary number of circuits added, also has small variance according to individual semiconductor lasers or conditions wherein semiconductor lasers are used, and can precisely detect deterioration of a semiconductor laser.
SOLUTION: An output voltage that an operational amplifier circuit 11 outputs by amplifying the voltage difference between a monitor voltage Vm and a predetermined reference voltage Vref, is output as a bias current set voltage Vbi to a bias current generating circuit unit 3 through a sample holding circuit comprising a switch SW1 and a sample holding capacitor Csh, and when the bias current set voltage Vbi exceeds a set voltage, a deterioration detection circuit 5 decides that a semiconductor laser LD deteriorates and outputs a predetermined deterioration detection signal Err.
COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：为了仅通过添加最少必需的电路来提供具有小电路规模的半导体激光器驱动单元，根据各个半导体激光器或使用半导体激光器的条件也具有小的变化，以及 可以精确地检测半导体激光器的劣化。 解决方案：通过放大监视电压Vm和预定参考电压Vref之间的电压差输出运算放大器电路11的输出电压作为偏置电流设定电压Vbi输出到偏置电流产生电路单元3，通过 包括开关SW1和采样保持电容器Csh的采样保持电路，并且当偏置电流设定电压Vbi超过设定电压时，劣化检测电路5判定半导体激光器LD劣化并输出预定的劣化检测信号Err。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2011061024A

公开(公告)日：2011-03-24

申请号：JP2009209486

申请日：2009-09-10

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： KAMAYA TOMOHIKO

IPC: H01S5/0683

CPC classification number: H03K5/084 ,  G06F1/3296 ,  Y02D10/172

Abstract: PROBLEM TO BE SOLVED: To provide a semiconductor device that can operate always suitably even when used in a plurality of power supply voltage regions, and can suppress an increase in chip area by reducing unused circuits as much as possible. SOLUTION: The semiconductor device includes: an internal circuit 5 to perform a predetermined function in the plurality of different supply power voltage regions; a power supply voltage region-detecting circuit 2 to detect a voltage region of an input supply power voltage to generate and output a signal indicating a detection result; a latch circuit 3 to store the output signal Scmp of the power supply voltage region-detecting circuit 2 and output the stored signal as a power supply voltage region signal S1; and a reset circuit 4 to generate and output a reset signal RES for the internal circuit 5 when the power source is turned on. The latch circuit 3 stores the output signal Scmp just after a reset operation for the internal circuit 5 is released, and the internal circuit 5 changes an internal setting according to the power supply voltage region signal S1. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供即使在多个电源电压区域中使用时也能够始终适当地操作的半导体器件，并且可以通过尽可能多地减少未使用的电路来抑制芯片面积的增加。 解决方案：半导体器件包括：在多个不同电源电压区域中执行预定功能的内部电路5; 电源电压区域检测电路2，用于检测输入电源电压的电压区域以产生并输出表示检测结果的信号; 锁存电路3，用于存储电源电压区域检测电路2的输出信号Scmp，并输出存储的信号作为电源电压区域信号S1; 以及复位电路4，用于在电源接通时产生并输出内部电路5的复位信号RES。 锁存电路3在内部电路5的复位操作刚刚解除之后存储输出信号Scmp，内部电路5根据电源电压区域信号S1改变内部设定。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011054765A

公开(公告)日：2011-03-17

申请号：JP2009202473

申请日：2009-09-02

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： KAMAYA TOMOHIKO

IPC: H01S5/042 ,  G11B7/125

CPC classification number: H01S5/042 ,  H01S5/0428 ,  H01S5/0683

Abstract: PROBLEM TO BE SOLVED: To provide a laser diode drive device that suppresses power consumption when a laser diode is driven and raises an output voltage of a power supply circuit at high speed.
SOLUTION: The laser diode drive device includes: a drive-current control circuit 10 that is connected to a cathode of a laser diode LD so as to control a current flowing in the LD; and a power supply circuit 20 that is connected to an anode of the LD so as to generate a variable output voltage applied to the LD. The power supply circuit 20 generates an initial value Vo_init of an output voltage which is equal to the sum of the maximum drive voltage, larger than an assumed drive voltage of the LD and a prescribed first reference voltage Vr1, obtians the then cathode voltage of the LD, and generates a voltage reduced from the initial value Vo_init of the output voltage so as to reduce the difference between the obatained cathode voltage and the first reference voltage Vr1. The first reference voltage Vr1 is the minimum cathode voltage necessary to supply a prescribed current to the LD by the drive-current control circuit 10.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种激光二极管驱动装置，其在驱动激光二极管时抑制功耗，并以高速提高电源电路的输出电压。 解决方案：激光二极管驱动装置包括：驱动电流控制电路10，其连接到激光二极管LD的阴极，以控制在LD中流动的电流; 以及连接到LD的阳极以产生施加到LD的可变输出电压的电源电路20。 电源电路20产生的输出电压的初始值Vo_init等于最大驱动电压的和，该最大驱动电压大于LD的假定驱动电压和规定的第一参考电压Vr1， LD，并且产生从输出电压的初始值Vo_init减小的电压，以便减少被吸收的阴极电压和第一参考电压Vr1之间的差。 第一参考电压Vr1是由驱动电流控制电路10向LD提供规定电流所需的最小阴极电压。版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010157573A

公开(公告)日：2010-07-15

申请号：JP2008334200

申请日：2008-12-26

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： KAMAYA TOMOHIKO

IPC: H01S5/062

Abstract: PROBLEM TO BE SOLVED: To provide a semiconductor laser array light quantity control circuit capable of performing high-precision APC even when the number of semiconductor lasers increases without requiring an expensive control circuit, and to provide an image forming apparatus using the semiconductor laser array light quantity control circuit. SOLUTION: Semiconductor devices 100 and 200 including a photodiode 510 which receives the quantities of light outputted from respective semiconductor lasers 501 to 504 and automatic light quantity control circuits 110 and 120 which perform control to set the quantities of light outputted from the corresponding semiconductor lasers 501 to 504 to the prescribed quantity of light emission corresponding to the output of the photodiode 510 according to input APC1 to APC4 signals each includes: an APC1 terminal and an APC2 terminal constituting APC signal input terminals; an APCO terminal constituting an APC report signal output terminal; and an LDOFF terminal constituting an APC detection signal input terminal, wherein the APCO terminal is connected to the LDOFF terminal. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 解决的问题：为了提供即使当半导体激光器的数量增加而不需要昂贵的控制电路时也能够执行高精度APC的半导体激光器阵列光量控制电路，并且提供使用半导体的图像形成装置 激光阵列光量控制电路。 解决方案：包括接收从各个半导体激光器501至504输出的光量的光电二极管510和自动光量控制电路110和120的半导体器件100和200，其执行控制以设置从相应的半导体激光器501至504输出的光的量 半导体激光器501至504根据输入APC1至APC4信号对应于光电二极管510的输出的规定量的发光，每个包括：APC1端子和构成APC信号输入端子的APC2端子; 构成APC报告信号输出端子的APCO端子; 以及构成APC检测信号输入端子的LDOFF端子，其中APCO端子连接到LDOFF端子。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2007236065A

公开(公告)日：2007-09-13

申请号：JP2006052699

申请日：2006-02-28

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： KAMAYA TOMOHIKO

IPC: H02J7/10 ,  H01M10/44

CPC classification number: H02J7/0036

Abstract: PROBLEM TO BE SOLVED: To provide a semiconductor integrated circuit for charge control, which can detect the connection of a secondary battery, using a simple circuit which minimizes the increase in its mounting space and cost, charging equipment which uses the semiconductor integrated circuit for charge control, and to provide a secondary battery connection detecting method. SOLUTION: The connection of the secondary battery 6 is confirmed, by checking the voltage of a battery connecting terminal P5 or the charge current "ich", utilizing each waiting time at the five points of time of the charge start point of time, the point of time of switching from a precharge mode to a constant current charge mode (first quick charge mode), the point of time of switching from the constant current charge mode to a constant-voltage charging mode (second quick charge mode), the point of time of charge completion, and the point of time of recharge start. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：为了提供可以使用最小化其安装空间和成本增加的简单电路来检测二次电池的连接的用于充电控制的半导体集成电路，使用半导体集成的充电设备 电路用于充电控制，并提供二次电池连接检测方法。

解决方案：通过检查电池连接端子P5的电压或充电电流“ich”来确认二次电池6的连接，利用充电开始时间点的五个时间点的每个等待时间 ，从预充电模式切换到恒定充电模式（第一快速充电模式）的时间点，从恒定电流充电模式切换到恒定电压充电模式（第二快速充电模式）的时间点， 充电完成的时间点，以及充电启动的时间点。 版权所有（C）2007，JPO＆INPIT