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1. 发明专利

JP2013182031A Power source device, charger, developing device, and image forming apparatus 审中-公开
标题翻译：电源装置，充电器，开发装置和图像形成装置
公开(公告)号：JP2013182031A
公开(公告)日：2013-09-12
申请号：JP2012043951
申请日：2012-02-29
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOZASA MADOKA
IPC分类号： G03G21/00 , G03G15/02 , G03G15/06
摘要： PROBLEM TO BE SOLVED: To suppress incorrect output generated in output voltage at the start or completion of operation of a power source device.SOLUTION: AC signal generation units 2a and 2b, and comparators 4a and 4b generate signals having a phase reverse to each other. If the DC level of a triangular wave 25 is deviated from the DC level of an AC signal 24a and an AC signal 24b, the DC voltage applied between terminals of an AC transformer 9 becomes 0 V as long as the AC signal 24a and the AC signal 24b have the same DC level, and thereby incorrect output is suppressed.
摘要翻译：要解决的问题：抑制在电源装置的开始或完成操作时输出电压中产生的不正确的输出。解决方案：交流信号产生单元2a和2b以及比较器4a和4b产生具有彼此相反的信号。如果三角波25的直流电平偏离交流信号24a和交流信号24b的直流电平，则交流变压器9的端子之间施加的直流电压只要是AC信号24a和AC 信号24b具有相同的DC电平，从而抑制不正确的输出。

2. 发明专利

JP2009160812A Optical source driver, optical scanner, and image forming apparatus 有权
标题翻译：光源驱动器，光学扫描仪和图像形成装置
公开(公告)号：JP2009160812A
公开(公告)日：2009-07-23
申请号：JP2008000238
申请日：2008-01-07
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NIHEI YASUHIRO , ISHIDA MASAAKI , OMORI JUNJI , KOZASA MADOKA , TANABE JUN
IPC分类号： B41J2/44 , G02B26/10 , G03G15/04 , H04N1/113
CPC分类号： H04N1/053 , H04N2201/0471 , H04N2201/04729 , H04N2201/04732 , H04N2201/04744 , H04N2201/04784 , H04N2201/04789
摘要： PROBLEM TO BE SOLVED: To provide an optical source driver superior in versatility, an optical scanner performing high density optical scanning without incurring a high cost, and an image forming apparatus forming a high quality image without incurring a higher cost.
SOLUTION: A write control circuit has: a first data switching circuit 219a for setting a correspondence relation between signals (S218
1 to S218
16 ) from respective line buffers and input signals (In1 to In16) of a delay circuit group 219b from a signal Ssw1 from a CPU210; and a second data switching circuit 219d for setting a correspondence relation between output signals (Out1 to Out16) of the delay circuit group 219b and drive signals (Dr1 to Dr16) from a signal Ssw2 from the CPU210. A plurality of emission sections are properly driven thereby, even if a main scanning direction in the optical scanner and an arrangement of a plurality of optical spots are any of CASE-1 to CASE-4.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了提供多功能性优异的光源驱动器，执行高密度光学扫描而不产生高成本的光学扫描仪，以及形成高质量图像的图像形成装置，而不会导致更高的成本。写控制电路具有：第一数据切换电路219a，用于设置来自各行缓冲器的信号（S218 1 至S218 16 ）之间的对应关系，以及来自CPU210的信号Ssw1的延迟电路组219b的输入信号（In1〜In16）以及第二数据切换电路219d，用于根据来自CPU210的信号Ssw2设置延迟电路组219b的输出信号（Out1至Out16）与驱动信号（Dr1至Dr16）之间的对应关系。即使在光扫描器中的主扫描方向和多个光点的布置是CASE-1至CASE-4中的任何一个，也可以适当地驱动多个发光部。版权所有（C）2009，JPO＆INPIT

3. 发明专利

JP2006289949A Pixel clock generating apparatus, optical scanner and image forming device 审中-公开
标题翻译：像素钟产生装置，光学扫描仪和图像形成装置
公开(公告)号：JP2006289949A
公开(公告)日：2006-10-26
申请号：JP2005356410
申请日：2005-12-09
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NIHEI YASUHIRO , ISHIDA MASAAKI , OMORI JUNJI , KOZASA MADOKA
IPC分类号： B41J2/44 , G02B26/10
摘要： PROBLEM TO BE SOLVED: To provide a pixel clock generating apparatus which makes the phase control of a pixel clock with a simple constitution and operates normally even when the pixel clock reaches a higher speed.
SOLUTION: The pixel clock generating apparatus includes a means for generating a high-frequency clock used as a criterion of the pixel clock, a means for detecting the state transition of the pixel clock and outputting a detected signal at the detected timing, a means for holding the phase data which indicates the transition timing of the pixel clock, a means for generating the control signal from the detected signal and the held phase data, a means for making the integrity of the pixel clock transit from the above control signal, a means for generating a delayed pixel clock by which the above pixel clock is delayed, and a pixel clock selecting means which selects any of the pixel clock and the above delayed pixel clock and uses it to latch the above phase data.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决的问题：提供一种像素时钟产生装置，其以简单的结构进行像素时钟的相位控制，即使当像素时钟达到更高的速度时也能正常工作。解决方案：像素时钟产生装置包括用于产生用作像素时钟的标准的高频时钟的装置，用于检测像素时钟的状态转换并在检测到的定时输出检测信号的装置，用于保持表示像素时钟的转换定时的相位数据的装置，用于从检测信号和保持的相位数据产生控制信号的装置，用于使像素时钟的完整性从上述控制信号传送的装置产生用于延迟上述像素时钟的延迟像素时钟的装置;以及像素时钟选择装置，其选择像素时钟和上述延迟像素时钟中的任何一个并使用其来锁存上述相位数据。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2006060751A Output device, differential output device, semiconductor laser modulation driving apparatus, image forming apparatus and electronic equipment 审中-公开
标题翻译：输出装置，差分输出装置，半导体激光调制驱动装置，图像形成装置和电子装置
公开(公告)号：JP2006060751A
公开(公告)日：2006-03-02
申请号：JP2004243447
申请日：2004-08-24
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOZASA MADOKA , ISHIDA MASAAKI , NIHEI YASUHIRO , OMORI JUNJI
IPC分类号： H03K19/0175 , H01S5/042 , H04L25/02
摘要： PROBLEM TO BE SOLVED: To adjust output impedance to a desired value in simple configuration regardless of element dispersion, and further to deal with high-speed signal transmission. SOLUTION: There is provided an impedance matching unit 3P or 3N which includes an impedance adjusting section and a dummy circuit section including the same configuration as the impedance adjusting section for determining an adjustment value matched to characteristic impedance of a transmission line and sets the determined adjustment value to the impedance adjusting section to adjust output impedance to be matched to the characteristic impedance, so that the output impedance of an output unit can be properly adjusted and matched to the characteristic impedance of the transmission line. At the same time, there are provided a switch transistor 2P, 2N of which ON/OFF is controlled for the purpose of switching an output to H level or L level and a constant current driving unit 4P, 4N for superimposing a constant current on the output, thereby accelerating the output and also dealing with the high-speed signal transmission. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：无论元件分散如何，都以简单的配置将输出阻抗调整到所需值，并进一步处理高速信号传输。解决方案：提供了一种阻抗匹配单元3P或3N，其包括阻抗调节部分和虚拟电路部分，该虚拟电路部分包括与阻抗调节部分相同的配置，用于确定与传输线路的特性阻抗匹配的调整值，并设置确定的调整值到阻抗调节部分，以调节与特性阻抗匹配的输出阻抗，使得可以适当地调节输出单元的输出阻抗并匹配传输线的特性阻抗。同时，为了将输出切换为H电平或L电平，设置有ON / OFF被控制的开关晶体管2P，2N，以及用于将恒定电流叠加在恒定电流上的恒流驱动单元4P，4N 输出，从而加速输出并处理高速信号传输。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2005268659A Semiconductor laser modulating driving device and image forming apparatus 有权
标题翻译：半导体激光调制驱动器件和图像形成装置
公开(公告)号：JP2005268659A
公开(公告)日：2005-09-29
申请号：JP2004081468
申请日：2004-03-19
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOZASA MADOKA , ISHIDA MASAAKI , NIHEI YASUHIRO , OMORI JUNJI
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： PROBLEM TO BE SOLVED: To realize the accelerating of an operation speed, improving of an EMI property or the like by transmitting at high speed an LD modulated signal for driving semiconductor laser (LD) to an LD driving portion.
SOLUTION: There is provided a small amplitude differential signal output unit 130 at an output side of an LD modulated signal generating portion 120 for generating the LD modulated signal from image data. There is provided a small amplitude differential signal input unit 160 at an input side of an LD driving portion 170 for driving a semiconductor (LD) 190 on the basis of the LD modulated signal. The LD modulated signal is converted to a small amplitude differential signal and is transmitted from the LD modulated signal generating portion 120 side to the LD driving portion 170 side. Furthermore, there is taken an impedance matching including the small amplitude differential signal output unit 130, the small amplitude differential signal input unit 160 and a transmission path.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：通过高速传输用于驱动半导体激光器（LD）的LD调制信号到LD驱动部分，实现加速操作速度，提高EMI特性等。解决方案：在LD调制信号产生部分120的输出侧提供一个小幅度差分信号输出单元130，用于从图像数据产生LD调制信号。在LD驱动部分170的输入侧设置有用于基于LD调制信号驱动半导体（LD）190的小幅度差分信号输入单元160。 LD调制信号被转换为小幅度差分信号，并从LD调制信号产生部分120侧发送到LD驱动部分170侧。此外，采取包括小幅度差分信号输出单元130，小振幅差分信号输入单元160和传输路径的阻抗匹配。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JP2005020704A Voltage controlled oscillator, pll circuit, pulse modulation signal generating circuit, semiconductor laser modulation device and image forming apparatus 有权
标题翻译：电压控制振荡器，PLL电路，脉冲调制信号发生电路，半导体激光器调制装置和图像形成装置
公开(公告)号：JP2005020704A
公开(公告)日：2005-01-20
申请号：JP2004075842
申请日：2004-03-17
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ISHIDA MASAAKI , NIHEI YASUHIRO , OMORI JUNJI , KOZASA MADOKA
IPC分类号： H03K3/354 , H03K3/0231 , H03K3/03 , H03L7/00 , H03L7/081 , H03L7/089 , H03L7/099 , H03L7/18
CPC分类号： H03L7/0812 , H03K3/0315 , H03K3/0322 , H03L7/0891 , H03L7/0995 , H03L7/18
摘要： PROBLEM TO BE SOLVED: To provide a voltage controlled oscillator having a low gain and a wide oscillation frequency range. SOLUTION: An oscillation frequency control part 100 includes a voltage-to-current converting circuit composed of an operational amplifier 101 of a rail-to-rail input/output and has linear voltage-to-current conversion characteristics in a range of input voltages from a ground potential GND to a power supply voltage Vcc thereby taking a dynamic range wider than conventional even in the low power supply voltage Vcc. An oscillating circuit part 200 includes a ring oscillator, wherein inverters are ring-connected and in each of the inverters, the same current as an output current of the oscillation frequency control part 100 flows. The voltage controlled oscillator has linear input voltage-oscillation frequency characteristics all over the range of input voltages from the ground potential to the power supply voltage Vcc. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供具有低增益和宽振荡频率范围的压控振荡器。解决方案：振荡频率控制部分100包括由轨到轨输入/输出的运算放大器101组成的电压 - 电流转换电路，并且具有在一定范围内的线性电压 - 电流转换特性输入电压从地电位GND到电源电压Vcc，从而即使在低电源电压Vcc中也比常规的动态范围宽。振荡电路部分200包括环形振荡器，其中反相器环形连接，并且在每个反相器中，与振荡频率控制部分100的输出电流相同的电流流动。压控振荡器在从地电位到电源电压Vcc的输入电压范围内具有线性输入电压 - 振荡频率特性。版权所有（C）2005，JPO＆NCIPI

7. 发明专利

JP2004304146A Device for driving light source and image forming apparatus 审中-公开
公开(公告)号：JP2004304146A
公开(公告)日：2004-10-28
申请号：JP2003307554
申请日：2003-08-29
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOZASA MADOKA , ISHIDA MASAAKI , NIHEI YASUHIRO , OMORI JUNJI
IPC分类号： B41J2/44 , H01S5/042
摘要： PROBLEM TO BE SOLVED: To provide a device for driving a light source which can easily respond to an increase in the number of semiconductor lasers in a laser printer or an increase in the numbers of signals of image data.
SOLUTION: A modulated signal generation part 120 generates modulated signals on the basis of the data (image data) generated by a data generation part 100. A driving part 200 drives a semiconductor laser (light source) 300 according to the modulated signals. The modulated signal generation part 120 has a configuration which outputs the modulated signals as differential signals with small amplitude. The driving part 200 and the modulated signal generation part 120 are separated and the modulated signal generation part 120 and the data generation part 100 are mounted on the same circuit board or made as the same integrated circuit.
COPYRIGHT: (C)2005,JPO&NCIPI

8. 发明专利

JP2004288791A Semiconductor laser modulation driving device and image forming apparatus 有权
公开(公告)号：JP2004288791A
公开(公告)日：2004-10-14
申请号：JP2003077459
申请日：2003-03-20
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ISHIDA MASAAKI , NIHEI YASUHIRO , OMORI JUNJI , KOZASA MADOKA
IPC分类号： B41J2/44 , G02B26/10 , H01S5/06 , H04N1/036
摘要： PROBLEM TO BE SOLVED: To simultaneously achieve generation of a high speed LD modulation signal, high speed transmission of an LD modulation signal and high speed driving of a semiconductor laser (LD). SOLUTION: An image data generation part 110 and an LD modulation signal generation part 120 are constituted on the same substrate (PCB) or the same ASIC 10. A LD driving part 170 is constituted on a substrate different from the above substrate or an ASIC 20 and arranged approaching a semiconductor laser (LD) 190. A small amplitude differential signal output 130 is arranged at the output side of the LD modulation signal generation part 120, a small amplitude differential signal input 160 is arranged at the input side of the LD driving part 170, and an LD modulation signal is transmitted between the PCB/the ASI 10, 20 by a differential signal of small amplitude. COPYRIGHT: (C)2005,JPO&NCIPI

9. 发明专利

JP2012186987A Switching power supply device, ac power supply device and image forming apparatus 审中-公开
标题翻译：切换电源装置，交流电源装置和图像形成装置
公开(公告)号：JP2012186987A
公开(公告)日：2012-09-27
申请号：JP2011199532
申请日：2011-09-13
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOZASA MADOKA
IPC分类号： H02M7/48 , G03G15/02
CPC分类号： G03G15/80
摘要： PROBLEM TO BE SOLVED: To provide a switching power supply device that reduces the amount of heat generation of an integrated circuit incorporating drivers FETs.SOLUTION: A switching power supply device 50 has, outside an integrated circuit 9, a diode (first diode) 14 having a cathode connected to a power terminal 7 of a high side switch element 12 and an anode connected to an output terminal 6, and a diode (second diode) 13 having an anode connected to a ground terminal 5 of a low side switch element 11 and a cathode connected to the output terminal 6. Either the diode 14 or the diode 13 becomes conductive in a period when both high side switch element 12 and low side switch element 11 are off. A drive signal generation section 2 generates PWM_H for making the high side switch element 12 conductive when the diode 13 turns off, and generates PWM_L for making the low side switch element 11 conductive when the diode 14 turns off.
摘要翻译：要解决的问题：提供一种减少包含驱动器FET的集成电路的发热量的开关电源装置。解决方案：开关电源装置50在集成电路9外部具有二极管（第一二极管）14，二极管（第一二极管）14具有连接到高侧开关元件12的电源端子7的阴极和连接到输出端子的阳极 6，以及具有与低侧开关元件11的接地端子5连接的阳极和连接到输出端子6的阴极的二极管（第二二极管）13。二极管14或二极管13中的任何一个都可以在高侧开关元件12和低侧开关元件11均断开。驱动信号生成部分2产生PWM_H，用于当二极管13断开时使高侧开关元件12导通，并且当二极管14断开时，产生用于使低侧开关元件11导通的PWM_L。版权所有（C）2012，JPO＆INPIT

10. 发明专利

JP2009196226A Pulse modulation signal generation unit, light source unit, optical scanner, and image formation apparatus 审中-公开
标题翻译：脉冲调制信号发生单元，光源单元，光学扫描仪和图像形成装置
公开(公告)号：JP2009196226A
公开(公告)日：2009-09-03
申请号：JP2008040766
申请日：2008-02-22
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOZASA MADOKA
IPC分类号： B41J2/44 , H04N1/113
CPC分类号： B41J2/471
摘要： PROBLEM TO BE SOLVED: To provide a unit for generating a pulse modulation signal without causing any increase in power consumption.
SOLUTION: A pulse modulation signal generation unit has: a circuit 219A for generating a plurality of high-frequency clock signals having phases different from each other; an image data conversion circuit 219B for determining transition timing data including information about a lighting timing at which the light emitting section of a light source transits from a lights-out state to a lighting state and an lights-out timing at which a transition is made from a lighting state to a lights-out state from external image data; and a circuit 219C for generating a pulse modulation signal from transition timing data by receiving any one of the plurality of high-frequency clock signals only during a predetermined period including the lighting timing and the lights-out timing.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供用于产生脉冲调制信号的单元，而不引起功率消耗的任何增加。解决方案：脉冲调制信号产生单元具有：电路219A，用于产生具有彼此不同相位的多个高频时钟信号; 用于确定转移定时数据的图像数据转换电路219B，包括关于光源从熄灯状态转变为点亮状态的发光部分的点亮时间和进行转变的熄灭时间的信息从照明状态到外部图像数据的熄灭状态; 以及电路219C，用于仅在包括点亮定时和熄灭定时的预定周期期间接收多个高频时钟信号中的任何一个，从转换定时数据生成脉冲调制信号。版权所有（C）2009，JPO＆INPIT

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