公开(公告)号：JP2013045095A

公开(公告)日：2013-03-04

申请号：JP2011185325

申请日：2011-08-26

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TOMITA SHOJI

IPC: G03G15/00 ,  G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide an image forming apparatus, even when there is deviation in an average printing rate, capable of suppressing a change in an image density.SOLUTION: When an average printing rate is lower than a predetermined threshold TH1, a forming condition is so determined as to form a toner patch image having a relatively high toner target density C1. When the average printing rate is higher than the predetermined threshold TH2 (>TH1), a forming condition is so determined as to form a toner patch image having a relatively low toner target density C2 (

Abstract translation: 解决的问题：为了提供能够抑制图像浓度变化的平均打印速度的偏差的图像形成装置。 解决方案：当平均打印率低于预定阈值TH1时，确定形成条件以形成具有较高调色剂目标密度C1的调色剂贴片图像。 当平均打印率高于预定阈值TH2（> TH1）时，确定形成条件以形成具有较低调色剂目标密度C2（

公开(公告)号：JP2008197179A

公开(公告)日：2008-08-28

申请号：JP2007029790

申请日：2007-02-08

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： MORIKUNI SHUICHI ,  TOMITA SHOJI ,  YOSHIOKA TORU ,  OSADA TSUTOMU ,  HIROTA TAKASHI

IPC: G03G15/08 ,  G03G21/00 ,  G03G21/14

Abstract: PROBLEM TO BE SOLVED: To provide a developing device and a developing method, wherein more accurate preliminary stirring time can be decided. SOLUTION: A humidity sensor 5 detects humidity in a developing tank, and a toner replenishment control part 44 calculates replenishing time when the developing device 1 is replenished with developer for replenishment from a replenishing device 2 based on input image data. A cumulative dot count time arithmetic calculation part 46 calculates developing time required for developing an electrostatic latent image based on input image data, and a part 47 measuring the time elapsed from the previous stirring time. A control part 40 decides the preliminary stirring time based on the detected humidity, the calculated replenishing time, the calculated developing time and the measured time. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种可以确定更准确的初步搅拌时间的显影装置和显影方法。 湿度传感器5检测显影槽中的湿度，并且调色剂补充控制部分44基于输入的图像数据计算补充显影装置1从补充装置2补充显影剂的补充时间。 累积点计数时间运算运算部46计算基于输入图像数据显影静电潜像所需的显影时间，以及测量从前一搅拌时间起经过的时间的部分47。 控制部40基于检测到的湿度，计算出的补充时间，计算出的显影时间和测定时间来决定初步搅拌时间。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2008102293A

公开(公告)日：2008-05-01

申请号：JP2006284362

申请日：2006-10-18

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TOMITA SHOJI ,  YOSHIOKA TORU ,  MORIKUNI SHUICHI ,  OSADA TSUTOMU ,  HIROTA TAKASHI

IPC: G03G15/00 ,  G03G21/00

CPC classification number: G03G15/0849 ,  G03G15/5041 ,  G03G2215/00033

Abstract: PROBLEM TO BE SOLVED: To form a toner image having toner density substantially approximate to a designed value, without causing stoppage of image forming operation, even when a toner density detection means breaks down in an image forming apparatus, having a mechanism for automatically adjusting the toner density of the toner image based on toner patch. SOLUTION: The image forming apparatus 1 includes a document feed means 30, a document reading means 31, an image forming means 32, a paper ejection means 33, a paper supply means 34, a patch density detection means (not shown), and a toner density adjusting means for adjusting the density of the toner image according to the result of detection by the patch density detection means. The image forming apparatus 1 is provided with a patch forming means for forming the toner patch, an operation detection means for detecting the operation state of the patch density detection means, and a patch printing means for obtaining the patch image by printing the toner patch, according to the result of the detection that the patch density detection means is not operating normally by the operation detection means, and adjusts the toner density based on the patch image. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：为了形成具有基本上接近设计值的调色剂浓度的调色剂图像，而不会导致图像形成操作的停止，即使当调色剂浓度检测装置在图像形成装置中发生故障时，具有用于 根据墨粉贴片自动调节墨粉图像的墨粉密度。 图像形成装置1包括原稿输入装置30，原稿读取装置31，图像形成装置32，纸张排出装置33，供纸装置34，贴片浓度检测装置（未示出） 以及调色剂浓度调节装置，用于根据贴片浓度检测装置的检测结果来调节调色剂图像的浓度。 图像形成装置1设置有用于形成调色剂贴片的贴片形成装置，用于检测贴片浓度检测装置的操作状态的操作检测装置和用于通过印刷调色剂贴片获得贴片图像的贴片印刷装置， 根据检测结果，斑块浓度检测装置不能由操作检测装置正常地操作，并且基于斑块图像调节调色剂浓度。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2008026574A

公开(公告)日：2008-02-07

申请号：JP2006198694

申请日：2006-07-20

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： YOSHIOKA TORU ,  MORIKUNI SHUICHI ,  TOMITA SHOJI ,  NAKAMURA SHOJI

IPC: G03G21/10 ,  G03G21/00

Abstract: PROBLEM TO BE SOLVED: To provide a position adjusting device for a cleaning member capable of disposing the cleaning member to the appropriate position not causing uneven wear of a photoreceptor. SOLUTION: A light emitting means emits light to the cleaning member held by a hold means 2, and light reflected by the cleaning member is detected by a reflected-light detection means 6. A calculating means 8 calculates information about the position of the cleaning member from the result of the detection by the reflected-light detection means. The operation of a drive means 9 controlled based on the result of the calculation drives the cleaning member to the appropriate position not causing uneven wear of the photoreceptor. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种能够将清洁部件设置到不会导致感光体不均匀磨损的适当位置的清洁部件的位置调节装置。 解决方案：发光装置向由保持装置2保持的清洁部件发光，并且由反射光检测装置6检测由清洁部件反射的光。计算装置8计算关于 清洁部件由反射光检测装置检测的结果。 基于计算结果控制的驱动装置9的操作将清洁构件驱动到适当的位置，而不会导致感光体的不均匀磨损。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2008015269A

公开(公告)日：2008-01-24

申请号：JP2006186999

申请日：2006-07-06

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： YOSHIOKA TORU ,  MORIKUNI SHUICHI ,  TOMITA SHOJI ,  NAKAMURA SHOJI

IPC: G03G15/08 ,  G03G15/00

Abstract: PROBLEM TO BE SOLVED: To suppress periodical density unevenness caused by eccentricity regarding a development roller without increasing cost. SOLUTION: The image forming apparatus is provided with: a latent image forming section where a latent image of a pattern for measurement is formed on a photoreceptor: a development unit having a development roller for feeding a toner to the surface of the photoreceptor and developing the latent image; a density measurement section where the density of the developed pattern for measurement is measured; a compensated signal creating section where the periodic density unevenness component corresponding to the period in the rotation of the development roller is extracted from the measured result of the density, and a compensated signal for development roller driving is created so as to suppress the extracted density unevenness component; and a development roller driving compensation section where, based on the compensated signal for development roller driving, the rotation speed in one rotation of the development roller is compensated. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：抑制由显影辊偏心引起的周期性浓度不均匀性而不增加成本。 解决方案：图像形成装置设置有：潜像形成部，其中在感光体上形成用于测量的图案的潜像;显影单元，具有用于将调色剂供给到感光体的表面的显影辊 并展现潜像; 测量显影图形的密度的密度测量部分; 补偿信号产生部分，其中从显影辊的旋转周期中对应的周期性浓度不均匀分量从密度的测量结果中提取，并且产生用于显影辊驱动的补偿信号，以便抑制提取的浓度不均匀性 零件; 以及显影辊驱动补偿部，其中，基于用于显影辊驱动的补偿信号，补偿显影辊的一圈旋转的转速。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2007279586A

公开(公告)日：2007-10-25

申请号：JP2006108752

申请日：2006-04-11

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： YOSHIOKA TORU ,  MORIKUNI SHUICHI ,  TOMITA SHOJI ,  NAKAMURA SHOJI

IPC: G03G15/00 ,  G03G15/08 ,  G03G21/14

CPC classification number: G03G15/0806 ,  G03G15/5062

Abstract: PROBLEM TO BE SOLVED: To form images at high speed without interrupting image forming operation while maintaining image quality even when consecutively forming the image at a high printing rate. SOLUTION: The image forming apparatus 100 includes a developing device 109, a photoreceptor drum 106 and a control part 50. The developing device 109 has a stirring blade 109A stirring toner and carrier stored inside, and supplies the stirred toner to the surface of the photoreceptor drum 106. The control part 50 acquires a printing rate from image information to be formed as an image, acquires necessary toner amount from the acquired printing rate when consecutively forming the image on paper whose number of sheets is equal to or above a predetermined number (100), and sets optimum image forming processing speed from the necessary toner amount and a mode set at present. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：即使在以高打印率连续地形成图像的同时，也可以在不中断图像形成操作的同时保持图像质量而高速地形成图像。 图像形成装置100包括显影装置109，感光鼓106和控制部50.显影装置109具有搅拌叶片109A，搅拌调色剂和载体储存在内部，并将搅拌的调色剂供给到表面 控制部分50从要形成为图像的图像信息中获取打印率，从连续形成图像的图像的所获得的打印率中获取必要的调色剂量，其中纸张的数量等于或大于 预定数量（100），并根据目前设定的必要调色剂量和模式设定最佳图像形成处理速度。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2004264503A

公开(公告)日：2004-09-24

申请号：JP2003053905

申请日：2003-02-28

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： MUKAI TAKASHI ,  TOMITA SHOJI ,  ONDA YUTAKA ,  ISHII HIROSHI

IPC: G03G21/00 ,  G03G15/02

Abstract: PROBLEM TO BE SOLVED: To provide an image forming apparatus that obtains a satisfactory image by preventing dielectric breakdown of the surface of a photoreceptor drum even when a high voltage electrifying bias is directly applied to the photoreceptor drum.
SOLUTION: The electrifying bias is uniformly applied to the surface of the photoreceptor drum by aerial discharge of the electrifying roller 121 of an electrifying device 12 of a non-contact system. The electrifying bias is such that an AC voltage with the positive polarity whose inter-peak voltage is 1.8 kVpp overlaps a discharge initiation voltage of -600 V with the negative polarity which is the same as the polarity used for electrifying the photoreceptor drum 11. Before the application of the electrifying bias, the photoreceptor drum is preliminarily electrified with the electrifying bias of a stir brush 16, which is set to the negative polarity that is lower than the electrifying bias used for electrifying the photoreceptor drum by the electrifying roller and that is the same polarity as the polarity used for electrifying the photoreceptor drum.
COPYRIGHT: (C)2004,JPO&NCIPI

公开(公告)号：JP2003015440A

公开(公告)日：2003-01-17

申请号：JP2001199469

申请日：2001-06-29

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TOMITA SHOJI ,  ISHII HIROSHI

IPC: G03G15/00 ,  G03G15/16

Abstract: PROBLEM TO BE SOLVED: To provide an image forming device which obtains a high picture quality regardless of variance of the resistance value of a transfer means at the time of continuous both-face printing. SOLUTION: An image forming device 1 is provided with a printing condition generation means 11 which generates a printing condition related to variance of the resistance value of a transfer roll 7, a resistance value estimation part 26 which estimates the resistance value of the transfer roll 7, and a control means 10 which corrects the resistance value of the transfer roll 7 on the basis of information given from the printing condition generation means 11 and the resistance value estimation part 26. The control means 10 updates a transfer bias on the basis of the resistance value of the transfer roll 7, so that the image forming device 1 can apply the most suitable transfer bias to the transfer roll 7 at any time in each transfer. Since the control means 10 updates the applied transfer bias in accordance with variance of the resistance value of the transfer roll 7, the image forming device 1 prevents a transfer defect to keep a satisfactory picture quality.

Abstract translation: 要解决的问题：提供一种图像形成装置，其在连续双面打印时获得高图像质量，而不管传送装置的电阻值的变化。 解决方案：图像形成装置1设置有产生与转印辊7的电阻值的变化相关的打印条件的打印条件生成装置11，估计转印辊7的电阻值的电阻值估计部26 ，以及根据从打印条件产生装置11和电阻值估计部分26给出的信息来校正转印辊7的电阻值的控制装置10.控制装置10基于 转印辊7的电阻值，使得图像形成装置1可以在每次转印中的任何时间向转印辊7施加最合适的转印偏压。 由于控制装置10根据转印辊7的电阻值的变化来更新施加的转印偏压，所以图像形成装置1防止转印缺陷以保持令人满意的图像质量。

公开(公告)号：JP2009186815A

公开(公告)日：2009-08-20

申请号：JP2008027683

申请日：2008-02-07

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： MORIKUNI SHUICHI ,  TOMITA SHOJI

IPC: G03G15/00 ,  G03G15/08

CPC classification number: G03G15/5041 ,  G03G15/065 ,  G03G15/0849 ,  G03G2215/00037

Abstract: PROBLEM TO BE SOLVED: To provide an image forming apparatus and an image forming method, capable of regularly providing, in a developing device using two-component developer, a developed image of a predetermined level or more according to the environment and change with time of the developing device. SOLUTION: The image forming apparatus 100 includes a charging device 22 which charges a photoreceptor drum 21, a developing device 24 which develops an electrostatic latent image formed on the drum 21, a developing bias application device 244 which applies a developing bias voltage to the developing device 24, a toner image density sensor 50 which detects an image density of a toner image formed on the drum 21, and a control part 200 which controls the output value of the application device 244. The developing bias voltage is adjusted by the control part 200 based on an average document printing rate in previous print jobs. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：为了提供一种图像形成装置和图像形成方法，能够在使用双组分显影剂的显影装置中定期提供根据环境和变化的预定级别或更多级的显影图像 随着显影装置的时间。 图像形成装置100包括对感光鼓21充电的充电装置22，形成在鼓21上的静电潜像的显影装置24，显影偏压施加装置244，其施加显影偏压 向显影装置24提供检测形成在鼓21上的调色剂图像的图像浓度的调色剂图像浓度传感器50以及控制施加装置244的输出值的控制部200.显影偏压由 控制部分200基于在先前打印作业中的平均文档打印率。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2009115855A

公开(公告)日：2009-05-28

申请号：JP2007285516

申请日：2007-11-01

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TOMITA SHOJI

IPC: G03G15/08

CPC classification number: G03G21/203 ,  G03G15/0848 ,  G03G15/0853

Abstract: PROBLEM TO BE SOLVED: To provide a developing device capable of adjusting to an appropriate toner density just after replacement of developer regardless of a humidity environment, and to provide an image forming apparatus including the same. SOLUTION: In the developing device 200, when developer is replaced, an initial toner density of developer for replacement is set so as to be equal to a toner density in its life or lower, and after replacement of the developer for replacement, a control section 40 determines whether toner replenishment is necessary or not, based on a detection value of a humidity sensor 26 prior to a development operation. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：提供一种能够在更换显影剂之后立即调节适当的调色剂浓度的显影装置，而不管湿度环境如何，并且提供包括该显影装置的图像形成装置。 解决方案：在显影装置200中，当更换显影剂时，将用于更换的显影剂的初始调色剂浓度设定为等于寿命或更低的调色剂浓度，并且在更换用于更换的显影剂之后， 基于在显影操作之前的湿度传感器26的检测值，控制部分40确定是否需要调色剂补充。 版权所有（C）2009，JPO＆INPIT