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1. 发明专利

JP2012240319A Light source drive device and image forming apparatus 有权
标题翻译：光源驱动装置和图像形成装置
公开(公告)号：JP2012240319A
公开(公告)日：2012-12-10
申请号：JP2011113138
申请日：2011-05-20
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ISHIDA MASAAKI , OMORI JUNJI , FUJITA ISATO
IPC分类号： B41J2/44 , G11B7/0045
CPC分类号： H05B33/0824 , G02B26/127 , G03B27/54 , H04N1/053 , H04N1/1135 , H04N2201/0471 , H04N2201/04729 , H04N2201/04732 , H04N2201/04744 , H04N2201/04774 , H04N2201/04789 , H05B33/0851
摘要： PROBLEM TO BE SOLVED: To provide a light source drive device and an image forming apparatus, which are able to improve response characteristic of light output by overshoot of a drive current while restraining deterioration of a light emitting element.SOLUTION: The light source drive device comprises: overshoot period setting means for calculating and setting an overshoot period in which overshoot current is added; and overshoot current setting means for calculating and setting a current value for the overshoot current. The overshoot period is set so as to be shorter than the period required from the rise up of the drive current to the detection of the light emission of the light source.
摘要翻译：解决的问题：提供一种光源驱动装置和图像形成装置，其能够通过抑制发光元件的劣化来改善驱动电流的超调的光输出的响应特性。解决方案：光源驱动装置包括：过冲周期设定装置，用于计算和设定相加过冲电流的过冲周期; 并且用于计算和设定过冲电流的当前值的过冲设定装置。将过冲时段设定为短于从驱动电流上升到光源的发光检测所需的时间。版权所有（C）2013，JPO＆INPIT

2. 发明专利

JP2012187811A Semiconductor laser drive device and image forming apparatus with the same 审中-公开
标题翻译：半导体激光器驱动器件和图像形成装置
公开(公告)号：JP2012187811A
公开(公告)日：2012-10-04
申请号：JP2011053186
申请日：2011-03-10
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： FUJITA ISATO , ISHIDA MASAAKI , AKATSU KAZUHIRO , OMORI JUNJI , IWATA MUNEO
IPC分类号： B41J2/44 , G03G15/04 , G03G15/043 , H01S5/062
摘要： PROBLEM TO BE SOLVED: To provide a semiconductor laser drive device having gradation reproducibility at low density, and to provide an image forming apparatus with the same.SOLUTION: The semiconductor laser drive device for driving the semiconductor laser includes: a drive current generation unit that generates a drive current for causing the semiconductor laser to emit light according to an input signal; a drive support current generating unit that generates a drive support current for supporting the drive current during an initial period when the drive current the drive current generating unit generates is on; a storage unit that stores an application time of the drive auxiliary current for controlling the ratio between an integral light quantity obtained from output characteristics of the semiconductor laser and a target value of the integral light quantity, or drive data indicative of a current amount; and a drive unit that drives the drive auxiliary current generating unit based on the drive data stored in the storage unit.
摘要翻译：要解决的问题：提供一种具有低密度灰度再现性的半导体激光驱动装置，并提供具有该半导体激光器的图像形成装置。解决方案：用于驱动半导体激光器的半导体激光器驱动装置包括：驱动电流产生单元，其根据输入信号产生使半导体激光器发光的驱动电流; 驱动支持电流产生单元，其在驱动电流产生单元产生的驱动电流开始的初始时段期间产生用于支持驱动电流的驱动支持电流; 存储单元，其存储用于控制从半导体激光器的输出特性获得的积分光量与积分光量的目标值之间的比率的驱动辅助电流的施加时间，或表示当前量的驱动数据; 以及驱动单元，其基于存储在存储单元中的驱动数据来驱动驱动辅助电流产生单元。版权所有（C）2013，JPO＆INPIT

3. 发明专利

JP2012153142A Optical scanner, optical scanning method, image forming apparatus, color image forming apparatus, program and recording medium 有权
标题翻译：光学扫描仪，光学扫描方法，图像形成装置，彩色图像形成装置，程序和记录介质
公开(公告)号：JP2012153142A
公开(公告)日：2012-08-16
申请号：JP2012045057
申请日：2012-03-01
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： TANABE JUN , ISHIDA MASAAKI , NIHEI YASUHIRO , OMORI JUNJI
IPC分类号： B41J2/44 , G03G15/04 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide an optical scanner capable of matching the sizes of images on both sides to each other in duplex printing.SOLUTION: The optical scanner has a light source driving and control means 50 to drive and control a plurality of light sources. The light source driving and controlling means 50 drives and controls a plurality of light sources so as to form a pixel by making an N number of light sources (N≥2) capable of scanning different positions in a subsidiary scanning direction emit light and scan. When subpixels correspond to a light source and a pixel is formed of a plurality of subpixels, deletes the data of the subpixels from image data in accordance with prescribed correction data in the subsidiary scanning direction and shifts the image data in the subsidiary scanning direction (reduction).
摘要翻译：要解决的问题：提供一种能够在双面打印中将两侧的图像尺寸彼此匹配的光学扫描仪。解决方案：光学扫描器具有驱动和控制多个光源的光源驱动和控制装置50。光源驱动和控制装置50通过使辅助扫描方向上能够扫描不同位置的N个光源（N≥2）发光和扫描来驱动和控制多个光源以便形成像素。当子像素对应于光源并且像素由多个子像素形成时，根据副扫描方向上的规定的校正数据从图像数据中删除子像素的数据，并且沿辅助扫描方向移动图像数据（缩小）。版权所有（C）2012，JPO＆INPIT

4. 发明专利

JP2012078849A Optical scanner, image forming apparatus, and color image forming apparatus 审中-公开
标题翻译：光学扫描仪，图像形成装置和彩色图像形成装置
公开(公告)号：JP2012078849A
公开(公告)日：2012-04-19
申请号：JP2011253705
申请日：2011-11-21
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ISHIDA MASAAKI , NIHEI YASUHIRO , OMORI JUNJI , TANABE JUN
IPC分类号： G02B26/10 , B41J2/44 , G02B26/12
摘要： PROBLEM TO BE SOLVED: To perform a positional correction of pixels in a sub-scanning direction with higher accuracy, and to correct bending of a scanning line at an optical system and a mechanical part with high accuracy, in an optical scanner having a plurality of light sources.SOLUTION: One pixel is formed by the whole m (n≥m≥2) light sources out of n (n≥2) light sources arranged at different positions at least in a sub-scanning direction.
摘要翻译：要解决的问题：为了以更高的精度执行副扫描方向的像素的位置校正，并且在具有高精度的光学系统和机械部件上校正扫描线的弯曲，在具有多个光源。解决方案：至少沿副扫描方向布置在不同位置的n（n≥2）个光源中，整个m（n≥m≥2）个光源形成一个像素。版权所有（C）2012，JPO＆INPIT

5. 发明专利

JP2011167898A Laser driving device, optical scanning device, image forming device, and laser driving method 有权
标题翻译：激光驱动装置，光学扫描装置，图像形成装置和激光驱动方法
公开(公告)号：JP2011167898A
公开(公告)日：2011-09-01
申请号：JP2010033088
申请日：2010-02-18
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ISHIDA MASAAKI , OMORI JUNJI
IPC分类号： B41J2/44 , G02B26/10 , H01S5/062 , H04N1/113
CPC分类号： H04N1/113 , G02B26/127 , H01S5/0428 , H01S5/06216 , H01S5/4025 , H04N1/02865
摘要： PROBLEM TO BE SOLVED: To provide a laser driving device capable of accurately performing pulse emission of a semiconductor laser without shortening the service life.
SOLUTION: A writing control circuit generates a select signal for expanding a pulse width of a light-emitting signal based on a difference between the pulse width of the light-emitting signal and a lighting pulse width of a laser chip 100. A light source driving circuit 221 includes an expand circuit 221d for expanding the pulse width based on the select signal, and a driver outputting a driving signal in correspondence with the light-emitting signal having the widened pulse width. In this case, thinning of the pulse in an optical waveform of light emitted from the laser chip 100 can be reduced without shortening the service life.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供能够在不缩短使用寿命的情况下能够精确地执行半导体激光器的脉冲发射的激光驱动装置。解决方案：写入控制电路基于发光信号的脉冲宽度和激光芯片100的点亮脉冲宽度之间的差产生用于扩展发光信号的脉冲宽度的选择信号。光源驱动电路221包括用于基于选择信号扩展脉冲宽度的扩展电路221d和与具有加宽的脉冲宽度的发光信号相对应地驱动驱动信号的驱动器。在这种情况下，可以减少从激光芯片100发射的光的光学波形中的脉冲的稀化，而不会缩短使用寿命。版权所有（C）2011，JPO＆INPIT

6. 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

7. 发明专利

JP2008292954A Pixel clock generator, optical scanner and image forming apparatus 有权
标题翻译：像素钟发生器，光学扫描仪和图像形成装置
公开(公告)号：JP2008292954A
公开(公告)日：2008-12-04
申请号：JP2007141013
申请日：2007-05-28
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ISHIDA MASAAKI , NIHEI YASUHIRO , OMORI JUNJI , TANABE JUN
IPC分类号： G02B26/10 , B41J2/44 , G03G21/14 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To output a pixel clock having a desired frequency. SOLUTION: An input signal f k ' having a desired magnitude and a stabilization time is generated by picking up the output signal f 2 of a first VCO 205e included in a PLL circuit and making a gain control amplifier 205g and a variable capacity 205h cooperate with each other. Thus, the frequency of the pixel clock PCLK output from a second VCO 205i is freely controlled. Further, a latent image is thus accurately formed on a photoreceptor, resulting in the formation of an image having neither noise nor color shift. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：输出具有期望频率的像素时钟。解决方案：通过拾取包含在第一VCO 205e中的第一VCO 205e的输出信号f SB SB2，产生具有期望幅度和稳定时间的输入信号f SB SB PLL电路并使增益控制放大器205g和可变容量205h相互配合。因此，从第二VCO 205i输出的像素时钟PCLK的频率被自由地控制。此外，因此，在感光体上精确地形成潜像，导致形成既没有噪声也没有色偏的图像。版权所有（C）2009，JPO＆INPIT

8. 发明专利

JP2008249980A Optical scanning device, optical scanning method, image forming apparatus, color image forming apparatus, program, and recording medium 审中-公开
标题翻译：光学扫描装置，光学扫描方法，图像形成装置，彩色图像形成装置，程序和记录介质
公开(公告)号：JP2008249980A
公开(公告)日：2008-10-16
申请号：JP2007090986
申请日：2007-03-30
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： TANABE JUN , ISHIDA MASAAKI , NIHEI YASUHIRO , OMORI JUNJI
IPC分类号： G02B26/10 , B41J2/44 , B41J3/60 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide an optical scanning device by which the sizes of images on both sides agree with each other when double-sided printing or the like is performed.
SOLUTION: The optical scanning device includes a light source driving control means 50 driving and controlling a plurality of light sources. The light source driving control means 50 drives and controls the plurality of light sources so that N light sources (N≥2) capable of scanning different positions in a sub scanning direction emit light and perform the scanning to form one pixel. When the subpixel corresponds to one light source, and one pixel is constituted of a plurality of sub pixels, the data of the subpixels are deleted in the sub scanning direction from the image data according to prescribed correction data to shift (reduce) the image data in the sub scanning direction.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种光学扫描装置，当进行双面打印等时，两侧的图像尺寸一致。解决方案：光学扫描装置包括驱动和控制多个光源的光源驱动控制装置50。光源驱动控制装置50驱动并控制多个光源，使得能够在副扫描方向扫描不同位置的N个光源（N≥2）发光并执行扫描以形成一个像素。当子像素对应于一个光源，并且一个像素由多个子像素构成时，子图像的数据沿副扫描方向从根据规定的校正数据的图像数据中删除以移位（减少）图像数据在副扫描方向。版权所有（C）2009，JPO＆INPIT

9. 发明专利

JP2008107674A Optical scanner, method of optical scanning, image forming apparatus and color image forming apparatus 审中-公开
标题翻译：光学扫描仪，光学扫描方法，图像形成装置和彩色图像形成装置
公开(公告)号：JP2008107674A
公开(公告)日：2008-05-08
申请号：JP2006292070
申请日：2006-10-27
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： TANABE JUN , ISHIDA MASAAKI , NIHEI YASUHIRO , OMORI JUNJI
IPC分类号： G02B26/10 , B41J2/44 , G02B26/12 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To correct the positions of pixels in a subscanning direction more precisely in an optical scanner having a plurality of light sources. SOLUTION: The optical scanner for scanning a plurality of light beams from a plurality of light sources in a main scanning direction includes a light source driving control means 50 which controls to drive the plurality of light sources, wherein when a virtual light source line is defined as an arrangement of light beams in a subscanning direction in view of the possibility of that the light emitting positions of the plurality of light sources are different from the arrangement of the light beams from the plurality of light sources in the case of the plurality of light sources, the light source driving control means 50 controls to drive the plurality of light sources in a way that L (L≥2) virtual light source lines arranged in the subscanning direction form L pixels, wherein one virtual light source line forms one pixel by emitting and scanning the M ((N-1)≥M≥1) light sources out of N (N≥2) light sources which can scan different positions in the subscanning direction, and the arrangement gap of the light sources in the subscanning direction corresponding to the adjacent light beams in the virtual light source line is COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：在具有多个光源的光学扫描器中，更精确地校正副扫描方向上的像素的位置。解决方案：用于在主扫描方向上从多个光源扫描多个光束的光学扫描器包括控制驱动多个光源的光源驱动控制装置50，其中当虚拟光源考虑到在多个光源的发光位置与来自多个光源的光束的布置不同的可能性的情况下，将光线定义为副扫描方向上的光束的布置多个光源，光源驱动控制装置50控制以以副扫描方向布置的L（L≥2）个虚拟光源线形成L个像素的方式驱动多个光源，其中一个虚拟光源线形成通过从可扫描副扫描方向的不同位置的N（N≥2）个光源发射和扫描M（（N-1）≥M≥1）个光源，与虚拟光源线中的相邻光束对应的副扫描方向上的光源的排列间隙为<5μm。版权所有（C）2008，JPO＆INPIT

10. 发明专利

JP2007226129A Optical scanner and image forming apparatus 有权
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2007226129A
公开(公告)日：2007-09-06
申请号：JP2006050168
申请日：2006-02-27
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： OMORI JUNJI , ISHIDA MASAAKI , NIHEI YASUHIRO , TANABE JUN
IPC分类号： G02B26/10 , B41J2/44 , H04N1/04 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To reduce the shift of the positions of beam spots on a face to be scanned in a short time during a job.
SOLUTION: The light receiving face of photodetecting sensors 141A to 141D, which receive light beams scanned with a scanning optical system 100, has a shape that the width in a main scanning direction varies from the central part in a subscanning direction to the other parts. Thus, the time during which the light beams are made incident on the light receiving face for scanning the central part in the subscanning direction is different from the time for scanning the other parts, and the shift of the positions of the beam spots in the subscanning direction is detected from the difference in the time of scanning. Further, the detection of synchronization in a main scanning direction is also possible by the photodetecting sensors which can simultaneously serve as elements for detecting the shift of positions and as elements for detecting synchronization.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：在作业期间在短时间内减少要扫描的光束上的光斑的位置的偏移。解决方案：接收用扫描光学系统100扫描的光束的光电检测传感器141A至141D的光接收面具有主副扫描方向上的中心部分沿主扫描方向的宽度变化的形状其他部分。因此，光束入射到副扫描方向上的中央部的光接收面的时间与扫描其他部分的时间不同，并且副扫描中的光束位置的偏移根据扫描时间的差异来检测方向。此外，通过可以同时用作用于检测位置偏移的元件和作为用于检测同步的元件的元件的光检测传感器，也可以在主扫描方向上检测同步。版权所有（C）2007，JPO＆INPIT

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