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1. 发明专利

JP2017090805A 光走査装置审中-公开
公开(公告)号：JP2017090805A
公开(公告)日：2017-05-25
申请号：JP2015223931
申请日：2015-11-16
申请人：キヤノン株式会社 , Canon Inc
发明人： SEKI YUICHI
IPC分类号： G02B26/10 , B41J2/47 , H04N1/113
CPC分类号： G03G15/043 , H04N1/0057 , H04N1/00904 , H04N1/06 , H04N1/113 , H04N2201/0081
摘要：【課題】光走査装置の光源への電流の供給を停止する。【解決手段】光走査装置2は、光ビームを出射する光源12と、光ビームの光量を検出する光量検出部14bと、光量検出部の検出結果に基づいて光ビームの光量を制御する光量制御部30と、を備え、光量制御部は、光源が光ビームの出射を開始する閾値電流より小さいバイアス電流を予め光源へ供給するとともに、画像信号に従って光源の発光を制御するために変調されたスイッチング電流をバイアス電流に重畳させた駆動電流の光源への供給を制御し、光量制御部は、光源へのバイアス電流および駆動電流の供給を停止させる電流停止手段54を有する。【選択図】図2

2. 发明专利

JP2008292685A Correction value determination device, correction value determination method and optical scanner 有权
标题翻译：校正值确定装置，校正值确定方法和光学扫描仪
公开(公告)号：JP2008292685A
公开(公告)日：2008-12-04
申请号：JP2007137013
申请日：2007-05-23
申请人： Canon Inc , キヤノン株式会社
发明人： SUGANO TAKASHI , SEKI YUICHI , KOGA KATSUHIDE
IPC分类号： G03G15/04 , B41J2/44 , G01J1/02 , G03G15/043 , H04N1/036
摘要： PROBLEM TO BE SOLVED: To provide a correction value determination device for correcting supply current of a semiconductor laser by using a correction value determined based on a plurality of measured illuminance distributions to output desired amount of light; a correction value determination method; and an optical scanner. SOLUTION: The correction value determination device includes: a measurement unit for measuring an illuminance of the laser exposure-scanning an image carrier; a first measurement means performing the measurement based on first supply current; a second measurement means performing the measurement based on second supply current; and a correction value determination means. The correction value determination means calibrates a value obtained by quantizing a difference between a first measurement value and a reference value based on a difference between the first measurement value and an expectation illuminance to be measured in a notice point when performing drive by the second supply current, and stores the calibrated value as the correction value in the notice point. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决的问题：提供一种校正值确定装置，用于通过使用基于多个测量的照度分布确定的校正值来校正半导体激光器的电源电流，以输出期望的光量; 校正值确定方法; 和光学扫描器。解决方案：校正值确定装置包括：测量单元，用于测量激光曝光扫描图像载体的照度; 第一测量装置基于第一电源电流进行测量; 第二测量装置，基于第二电源电流进行测量; 和校正值确定装置。校正值确定装置，通过基于第一测量值和在通过第二电源电流进行驱动时的通知点中待测量的期望照度之间的差量量化第一测量值和参考值之间的差而获得的值并将校准值作为校正值存储在通知点中。版权所有（C）2009，JPO＆INPIT

3. 发明专利

JP2004341419A Rotary polygon mirror driver 审中-公开
公开(公告)号：JP2004341419A
公开(公告)日：2004-12-02
申请号：JP2003140461
申请日：2003-05-19
申请人： Canon Inc , キヤノン株式会社
发明人： SEKI YUICHI , OTAKA KOICHI , TAKAZAWA HIROSHI , WADA ATSUSHI , SEKIGUCHI TAKASHI , NAKAHARA TAKASHI
IPC分类号： B41J2/44 , G02B26/10 , G02B26/12 , H02P6/08 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To prevent noise wcaused by electromagnetic vibration due to sudden current fluctuation at start up/synchronization lead-in in rotary polygon mirror driving method of an image forming device. SOLUTION: In a motor driving circuit, a scanner motor starts rotation by a rotation start signal and a rotation permit signal which is outputted when the rotation start signal of the scanner motor and the number of rotations of the motor are within a range set in advance. When the rotation permit signal is not outputted, a driving stop signal of the scanner motor is invalidated. When the scanner motor starts rotating by the rotation start signal and the rotation permit signal is outputted, the driving stop signal is validated. COPYRIGHT: (C)2005,JPO&NCIPI

4. 发明专利

JP2004268503A Frequency modulation device 审中-公开
公开(公告)号：JP2004268503A
公开(公告)日：2004-09-30
申请号：JP2003064996
申请日：2003-03-11
申请人： Canon Inc , キヤノン株式会社
发明人： SEKI YUICHI
IPC分类号： B41J2/44 , G02B26/10 , G02B26/12 , G03G15/04 , G03G15/043
摘要： PROBLEM TO BE SOLVED: To provide a frequency modulation device capable of accurately correcting a printing rate and obtaining high printing quality. SOLUTION: A main scanning magnification correction circuit reads a reference image (shown in Fig. 9) and distances between pixels (a main scanning distance signal 4) corresponding to respective divided segments in the read reference image are measured. Error rates γk of each of the measured distances between pixels (the main scanning distance signal 4) and an ideal distance between pixels are calculated, and then magnification coefficients αk of the segments respectively corresponding to the calculated error rates γk are changed. COPYRIGHT: (C)2004,JPO&NCIPI

5. 发明专利

JP2004103839A Semiconductor multiple beam laser device and image forming device 审中-公开
公开(公告)号：JP2004103839A
公开(公告)日：2004-04-02
申请号：JP2002263992
申请日：2002-09-10
申请人： Canon Inc , キヤノン株式会社
发明人： SEKI YUICHI
IPC分类号： B41J2/44 , G02B26/10 , G03G15/04 , H01S5/00 , H01S5/022 , H01S5/026 , H01S5/0683 , H01S5/40
CPC分类号： B41J2/442 , H01L2224/48091 , H01S5/02212 , H01S5/02248 , H01S5/0683 , H01S5/4025 , H01L2924/00014
摘要： PROBLEM TO BE SOLVED: To provide a semiconductor multibeam laser which reduces the heat interference of a laser diode and can obtain stable light output.
SOLUTION: Laser diode chips made from the same wafer lot of semiconductors, and a plurality of laser diode chips whose relative difference in optical/electric characteristics is within the value previously set in the laser diode chips, are arranged. One photodiode receiving back beams of a plurality of the laser diode chips is mounted in the same package.
COPYRIGHT: (C)2004,JPO

6. 发明专利

JP2004058313A Imaging apparatus 有权
公开(公告)号：JP2004058313A
公开(公告)日：2004-02-26
申请号：JP2002216631
申请日：2002-07-25
申请人： Canon Inc , キヤノン株式会社
发明人： SEKI YUICHI
IPC分类号： B41J2/44 , G03G15/04 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To obtain an imaging apparatus in which a decision can be made that the scanning positions of a plurality of laser beams are arranged at a specified interval when the output signals from a scanning position sensor consisting of a plurality of light receiving sensors for detecting the scanning light of the plurality of laser beams coincide with each other.
SOLUTION: An optical scanner is arranged to form a latent image on an image carrier using a multibeam being emitted from a semiconductor laser as a light source. The optical scanner includes a plurality of light receiving parts for receiving the multibeam not smaller in number than that of the beams. The plurality of light receiving parts are arranged not to overlap each other while being shifted by a specified interval in the subscanning direction. The light receiving part is shaped such that the edges on the starting side in the main scanning direction are parallel with each other, the edges on the ending side in the main scanning direction are parallel with each other, and the edges on the starting side are not parallel with the edges on the ending side in the main scanning direction.
COPYRIGHT: (C)2004,JPO

7. 发明专利

JP2014115419A Optical scanner and image forming apparatus 审中-公开
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2014115419A
公开(公告)日：2014-06-26
申请号：JP2012268715
申请日：2012-12-07
申请人： Canon Inc , キヤノン株式会社
发明人： SEKI YUICHI
IPC分类号： G02B26/10 , B41J2/44 , G03G15/00 , G03G15/04 , G03G15/043
摘要： PROBLEM TO BE SOLVED: To provide an optical scanner which prevents increase in circuit scale and power consumption, and controls quantity of light with high accuracy.SOLUTION: An optical scanner includes: a semiconductor laser 11 which emits a plurality of laser beams; a PD 14b which detects a laser beam emitted from the semiconductor laser 11 and outputs monitor current value 15 corresponding to the quantity of the light beam; and a laser control part 12 which controls the light quantity of the laser beams. The laser control part 12 compares monitor current values to be obtained when the laser beams are driven with the same current value and emitted, to specify a reference laser beam from among the laser beams. The laser control part 12 generates a first drive value for emitting the reference laser beam with a predetermined light quantity, and generates a second drive value for driving laser beams other than the reference laser beam on the basis of the first drive value.
摘要翻译：要解决的问题：提供一种防止电路规模和功耗增加并且以高精度控制光量的光学扫描器。解决方案：光学扫描器包括：发射多个激光束的半导体激光器11; PD 14b，其检测从半导体激光器11发射的激光束，并输出与光束量对应的监视电流值15; 以及控制激光束的光量的激光控制部12。激光控制部分12比较当激光束以相同的电流值被驱动并且发射时获得的监视电流值，以指定激光束中的参考激光束。激光控制部分12产生用于以预定光量发射参考激光束的第一驱动值，并且基于第一驱动值产生用于驱动除参考激光束之外的激光束的第二驱动值。

8. 发明专利

JP2013218100A Image formation apparatus 有权
标题翻译：图像形成装置
公开(公告)号：JP2013218100A
公开(公告)日：2013-10-24
申请号：JP2012088425
申请日：2012-04-09
申请人： Canon Inc , キヤノン株式会社
发明人： SEKI YUICHI
IPC分类号： G03G21/00 , B41J2/44 , B41J29/13 , B41J29/38 , B41J29/46 , G03G15/04 , H04N1/00
摘要： PROBLEM TO BE SOLVED: To provide an image formation apparatus that can surely block the current to a light-emitting element and surely prevent breakage of the light-emitting element when electric power supply to the apparatus is stopped by an opened door or the like.SOLUTION: In the image formation apparatus, power sources Vcc1 and Vcc2 individually supply power to a controlling unit 30 and a drive unit 31 which are included in a laser driving device 12. In this case, the image formation apparatus is provided with a power source monitoring unit 32 which detects that voltage values of the power sources Vcc1 and Vcc2 are equal to or lower than first and second detection voltage values respectively. When the power source monitoring unit 32 outputs a monitoring signal by voltage drop of the power source Vcc1, a first switch 48 is turned off to cut off the connection between the controlling unit 30 and the drive unit 31. When the power source monitoring unit 32 outputs the monitoring signal by voltage drop of the power source Vcc2, the first switch 48 is turned off and a second switch 49 is turned on, thereby initializing the controlling unit 30.
摘要翻译：要解决的问题：提供一种能够确实地将电流阻挡到发光元件的图像形成装置，并且当通过打开的门等停止对设备的电力供应时，可靠地防止发光元件的破损。解决方案：在图像形成装置中，电源Vcc1和Vcc2分别向包括在激光驱动装置12中的控制单元30和驱动单元31供电。在这种情况下，图像形成装置设置有电源检测电源Vcc1和Vcc2的电压值分别等于或低于第一和第二检测电压值的监视单元32。当电源监视单元32通过电源Vcc1的电压降输出监视信号时，关闭第一开关48以切断控制单元30和驱动单元31之间的连接。当电源监视单元32 通过电源Vcc2的电压降输出监视信号，第一开关48断开，第二开关49导通，由此初始化控制单元30。

9. 发明专利

JP2012198482A Optical scanning device, light quantity control method therefor, and image forming apparatus 有权
标题翻译：光学扫描装置，其光量控制方法及图像形成装置
公开(公告)号：JP2012198482A
公开(公告)日：2012-10-18
申请号：JP2011064198
申请日：2011-03-23
申请人： Canon Inc , キヤノン株式会社
发明人： SEKI YUICHI
IPC分类号： G02B26/10 , B41J2/44 , H01S5/0683 , H04N1/113
CPC分类号： G06K15/1214 , H04N1/1135 , H04N1/40031 , H04N2201/0471 , H04N2201/04729 , H04N2201/04732 , H04N2201/04744
摘要： PROBLEM TO BE SOLVED: To provide an optical scanning device capable of correcting nonlinearity of current-light quantity characteristics of a multi-beam to a semiconductor laser, while simplifying a circuit configuration.SOLUTION: An optical scanning device 2 includes a laser control device 12 that controls a light intensity detected by a PD unit 14 for making the light quantity of a semiconductor laser 11 a predetermined light quantity. The laser control device 12 includes: an approximate expression calculating circuit 48 that calculates n-order approximate expression (n≥2) of the current-light quantity characteristics based on a light quantity value obtained by emitting predetermined laser beam out of LD1-LD4 of the semiconductor laser 11, by a plurality of constant currents generated by a constant current generating circuit 46, and calculating a light emission starting current of the semiconductor laser 11 from the n-order approximate expression: and bias current calculating circuits a55-d85 for generating a bias current from the current value obtained by the light quantity control other than the predetermined laser beam and the n-order approximate expression obtained by the approximate expression calculating circuit 48.
摘要翻译：要解决的问题：提供一种能够将半波束的电流 - 光量特性的非线性校正到半导体激光器的光学扫描装置，同时简化电路配置。解决方案：光学扫描装置2包括激光控制装置12，其控制由PD单元14检测的用于使半导体激光器11的光量达到预定光量的光强度。激光控制装置12包括：近似表达式计算电路48，其计算当前光量特性的n次近似表达式（n≥2），其基于通过从由LD1-LD4中的预定激光束发射的光量值半导体激光器11通过由恒定电流发生电路46产生的多个恒定电流，并根据n次近似表达式计算半导体激光器11的发光启动电流;以及偏置电流计算电路a55-d85，用于产生来自通过除了预定激光束之外的光量控制获得的电流值的偏置电流和由近似表达式计算电路48获得的n阶近似表达式。（C）2013，JPO和INPIT

10. 发明专利

JP2011020282A Optical scanning apparatus and image forming apparatus 有权
标题翻译：光学扫描装置和图像形成装置
公开(公告)号：JP2011020282A
公开(公告)日：2011-02-03
申请号：JP2009164948
申请日：2009-07-13
申请人： Canon Inc , キヤノン株式会社
发明人： SEKI YUICHI
IPC分类号： B41J2/44 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide an optical scanning apparatus capable of suppressing deterioration in accuracy in controlling a light amount of a laser beam caused by a relative output error generated between electric current sources.
SOLUTION: A switching correction value 72 and a bias correction value 73 for correcting a sensitivity variation of a photosensitive drum 13 are calculated. A correction factor 81 for correcting a relative output error between a switching DAC (digital analog converter) 59 and a bias DAC 61 is calculated. The switching correction value 72 is subtracted from a switching electric current code value 55, and an electric current corresponding to the subtracted value 75 is formed as a switching electric current 60. The correction factor 81 and the bias correction value 73 are multiplied. The multiplied value 79 is added with the bias electric current code value 57, and an electric current corresponding to the added value 77 is formed as a bias electric current 62. Then, the switching electric current 60 and the bias electric current 62 are added, and supplied to a light emitting part 4a as a drive electric current 64a.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：解决的问题：提供一种能够抑制由电流源之间产生的相对输出误差而导致的控制激光束的光量的精度降低的光学扫描装置。解决方案：计算用于校正感光鼓13的灵敏度变化的开关校正值72和偏置校正值73。计算用于校正开关DAC（数字模拟转换器）59和偏置DAC 61之间的相对输出误差的校正系数81。从切换电流代码值55中减去切换校正值72，并且将与减法值75相对应的电流形成为开关电流60.校正因子81和偏差校正值73相乘。相加值79加上偏置电流代码值57，并且将与加法值77相对应的电流形成为偏置电流62.然后，添加开关电流60和偏置电流62，并作为驱动电流64a供给到发光部4a。版权所有（C）2011，JPO＆INPIT

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