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1. 发明专利

JP2003315707A Multi-beam laser printer and horizontal step-out detection method for multi-beam laser scanning optical system 审中-公开
标题翻译：多波束激光扫描光学系统的多光束激光打印机和水平步进检测方法
公开(公告)号：JP2003315707A
公开(公告)日：2003-11-06
申请号：JP2002118660
申请日：2002-04-22
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YAMAMOTO YUKIO , SUMIYOSHI MICHIO , SHOJI JUNICHI , MATSUO KAZUYOSHI , OTAKA MAKOTO , TAKEYA MASAHARU , SHIBUYA TAKESHI
IPC分类号： B41J2/44 , G02B26/10 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide a method of detecting a horizontal step-out of a multi-beam laser scanning system with high accuracy by using simple constitution and processing.
SOLUTION: The horizontal step-out Td is detected from the difference between a beam detect signal pulse with T2 obtained when a 1st light emitting element is continuously driven and a pulse with Tw+Td when the driving is switched halfway from the 1st light emitting element to a 2nd light emitting element. Only one light emitting element is always driven before and after a rise and a fall of the beam detect signal, so that the influence of a difference in laser power is eliminated.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种通过简单的结构和处理以高精度检测多光束激光扫描系统的水平逐步退出的方法。解决方案：从第1发光元件连续驱动时获得的光束检测信号脉冲与第1发光元件连续驱动时的T2检测信号脉冲与当从第1发光元件的中途切换时的Tw + Td的脉冲之间的差检测出水平失步Td 发光元件连接到第二发光元件。始终在光束检测信号的上升和下降之前和之后驱动一个发光元件，从而消除了激光功率差的影响。版权所有（C）2004，JPO

2. 发明专利

JP2003205640A DRIVER OF LIGHT EMITTING ELEMENT 审中-公开
公开(公告)号：JP2003205640A
公开(公告)日：2003-07-22
申请号：JP2002004829
申请日：2002-01-11
申请人： HITACHI LTD
发明人： YAMAMOTO YUKIO , SUMIYOSHI MICHIO , SHOJI JUNICHI , MATSUO KAZUYOSHI
IPC分类号： B41J2/44 , G02B26/10 , H01S5/042 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To reduce thermal interference while suppressing lowering of lifetime or variation of driving current characteristics for a plurality of light emitting elements. SOLUTION: When driving currents are fed to light emitting elements 11 and 12 constituting a multibeam diode according to driving signals D1 and D2, bias currents are fed to the light emitting elements 11 and 12 by applying bias signals B1 and B2 during a specified interval T1 before rising of the driving signals D1 and D2 and a specified interval T2 after falling thereof in order to arrange the rising and falling characteristics of the driving currents of the light emitting elements 11 and 12 thus preventing deterioration of image quality. COPYRIGHT: (C)2003,JPO

3. 发明专利

JP2002214858A ELECTROPHOTOGRAPHIC IMAGE FORMING DEVICE 失效
公开(公告)号：JP2002214858A
公开(公告)日：2002-07-31
申请号：JP2001012597
申请日：2001-01-22
申请人： HITACHI LTD
发明人： ONOSE ATSUSHI , SUMIYOSHI MICHIO , MATSUO KAZUYOSHI , TAKANO YUICHI
IPC分类号： G03G15/00 , G03G21/00
摘要： PROBLEM TO BE SOLVED: To provide an electrophotographic image forming device in which state of environment, such as the outdoor air temperature, can e detected without being influenced by peripheral parts, proper environmental control is carried out and proper image can be obtained. SOLUTION: In the electrophotographic image forming device 1, a sensor 2 detecting the temperature imparting influence on the amount of control applied to various constituting parts is installed beside a storing container 3 storing the media. The temperature information from the sensor is inputted to a control substrate 5, and image quality control is carried out. It is recommended that the temperature detection sensor be especially installed on a substrate of a media detection sensor which carries out the media detection.

4. 发明专利

JP2001042696A IMAGE FORMING DEVICE 失效
公开(公告)号：JP2001042696A
公开(公告)日：2001-02-16
申请号：JP21635499
申请日：1999-07-30
申请人： HITACHI LTD
发明人： ISHII MIEKO , ONOSE KATSUYOSHI , FUKAZAWA NOBUAKI , MATSUO KAZUYOSHI
IPC分类号： G03G15/20 , G05D23/19
摘要： PROBLEM TO BE SOLVED: To shorten the time required for warming up of an image forming device and to prevent the deterioration of an image and troubles such as jam ming of transfer sheets from occurring by deciding the temperature of a fixing roller at the start time rotation of the fixing roller, according to temperature at the point of time, when heating the fixing roller is started. SOLUTION: When the power source of a printer is turned on or when an output signal is outputted to the image forming device such as printer, warming-up is started. The temperature of the surface of a fixing roller 18 at a time when the warming-up is started is measured. The temperature of the surface is sent to a controller 12, and roller rotation starting temperature is calculated and set by the controller 12. Thereafter, when the temperature of the surface of he roller 18 attains the roller rotation start temperature, the roller 18 is rotated. The rotation of the roller 18 is finished, if it is decided the temperature of the surface of the roller 18 attained the fixing temperature, or when the time taken until the temperature in the fixing device 8 no longer changes by the rotation of the roller 18 is elapsed.

5. 发明专利

JPH08292623A COLOR ELEECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH08292623A
公开(公告)日：1996-11-05
申请号：JP9477195
申请日：1995-04-20
申请人： HITACHI LTD
发明人： MATSUO KAZUYOSHI , SASAKI AKIRA , YAMAMOTO MASASHI
IPC分类号： G03G15/01 , G03G15/08 , G03G15/16
摘要： PURPOSE: To provide a high-performance cleaning device completely removing toner remaining on an intermediate transfer body in accordance with the use environment of a color electrophotographic device, and to obtain high-quality image output without an afterimage or faulty cleaning. CONSTITUTION: This device is provided with a cleaning means 2 for removing the toner remaining on the intermediate transfer body, a toner recovering means 8 recovering the toner adhering to the cleaning means 2, and a bias setting means 5 setting bias required for cleaning. It is also equipped with a bias control means 7 variably controling the bias and an environment detection means 3 detecting the environmental state, and the cleaning bias is variably controlled by the control means 7 based on the detected result by the detection means 8.

6. 发明专利

JPH07175288A COLOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH07175288A
公开(公告)日：1995-07-14
申请号：JP31770693
申请日：1993-12-17
申请人： HITACHI LTD
发明人： SUMIYOSHI MICHIO , SASAKI AKIRA , MATSUO KAZUYOSHI , KOGORI JUNJI , AKIMARU SUSUMU
IPC分类号： B41J2/52 , G03G15/00 , G03G15/01 , G03G15/08 , H04N1/29
摘要： PURPOSE:To obtain an excellent color image by preventing the image density from changing due to the change of the toner static charge quantity corresponding to the change of the ambient environmental condition, particularly the change of the humidity. CONSTITUTION:The device is provided with a CPU 1 by which the toner density control target value is corrected basing on the detection signal obtained from an environment detecting means 5 and the developer color information under development of the electrostatic latent image obtained basing on the information from a host 100, and the control property of the toner feeding means is corrected basing on the toner density detection signal obtained from the toner density detecting units 12c, 13c, 14c and 15c. Basing on the toner density control target value at a normal temp./a normal humidity as reference value, the toner density control target value is corrected so as to be lowered when the humidity is high and the toner density control target value is raised when the humidity is low, and moreover, these target value is respectively corrected by each color, thus the excellent color image can be obtained by preventing the image density from changing by correcting the change of the toner sticking quantity to the electrostatic latent image due to the change of the environment.

7. 发明专利

JPH11133795A PRINTER 失效
公开(公告)号：JPH11133795A
公开(公告)日：1999-05-21
申请号：JP29818397
申请日：1997-10-30
申请人： HITACHI LTD
发明人： OUCHI YOSHIO , KUMADA KATSUMI , FUKAZAWA NOBUAKI , MATSUO KAZUYOSHI , ONOSE KATSUYOSHI
IPC分类号： G03G15/20 , H05B3/00
摘要： PROBLEM TO BE SOLVED: To improve the fixing performance of a printer by enhancing the temperature detecting accuracy of a fixing roller. SOLUTION: A temperature detecting element for detecting the temp. of a fixing device is attached to a attaching plate which is installed in the fixing device and provided with both functions of mechanical strength and heat dissipativity, a temperature sensor 132 vertically approaches the fixing roller, to make the heat dissipation of the attaching part excellent and plural vents are provided in the attaching plate of the temperature sensor 132, to make the flowing of heat excellent. Thus, the temperature detecting accuracy of the fixing roller can be enhanced to improve the fixing performance of the printer.

8. 发明专利

JPH113021A ELECTROPHOTOGRAPHIC RECORDING DEVICE AND ELECTROPHOTOGRAPHIC RECORDING SYSTEM 失效
公开(公告)号：JPH113021A
公开(公告)日：1999-01-06
申请号：JP15511997
申请日：1997-06-12
申请人： HITACHI LTD
发明人： FUKAZAWA NOBUAKI , SUMIYOSHI MICHIO , MATSUO KAZUYOSHI , FURUKAWA SHIGETAKA
IPC分类号： B41J29/38 , G03G21/14
摘要： PROBLEM TO BE SOLVED: To simplify a paper feeding mechanism for feeding a nonstandard size paper. SOLUTION: In the case of recording on the nonstandard-size paper, a nonstandard-size recording paper is fed from a paper feeding cassette by an engine controller 4, and also, such a horizontal synchronizing signal and a vertical synchronizing signal are generated that are suitable for a recording control state with reference to the maximum-sized recording paper capable of recording by an electrophotographic process executing means while disregarding the detection information on the size of the recording paper stored in the paper feeding cassette. Data on an image to be recorded is transferred by a master controller 3 in accordance with the horizontal synchronizing signal and the vertical synchronizing signal.

9. 发明专利

JPH07672A FULLY AUTOMATIC WASHING MACHINE 失效
公开(公告)号：JPH07672A
公开(公告)日：1995-01-06
申请号：JP14063993
申请日：1993-06-11
申请人： HITACHI LTD
发明人： MATSUO KAZUYOSHI , KOGORI JUNJI , TAWARA KAZUO , YASUJIMA TOSHIYUKI
IPC分类号： D06F13/02 , D06F39/00 , D06F39/12
摘要： PURPOSE:To reduce the enlargement of a fully automatic washing machine and the radiation of high frequency noise. CONSTITUTION:An auxiliary controller for driving a motor 3 and a clutch mechanism 110 is covered with a controller cover 1 and mounted on a center base 2 situated in a space on the lower side of a washing tub 103, whereby the enlargement of the whole washing machine can be prevented even when the auxiliary controller is enlarged. In the space, the wiring distance is short because the motor 3 and the clutch mechanism 110 are set near, and the radiation of high frequency noise is reduced even when a current containing a high frequency component is supplied.

10. 发明专利

JPH06134174A WASHING MACHINE 失效
公开(公告)号：JPH06134174A
公开(公告)日：1994-05-17
申请号：JP29138592
申请日：1992-10-29
申请人： HITACHI LTD
发明人： KOGORI JUNJI , MATSUO KAZUYOSHI , TAWARA KAZUO , YASUJIMA TOSHIYUKI , GOMITA HISAMITSU
IPC分类号： D06F33/02
摘要： PURPOSE:To improve washing power and to reduce the damage of clothes by changing the start/stop time of a motor and providing water currents corresponding to the quantity and quality of laundry. CONSTITUTION:An acceleration processing part 11 in a microcomputer 6 prepares a motor revolving speed internal command DELTAN* from a motor revolving speed external command N* in order to provide the start/stop time of motor revolving speed N of a motor 2 corresponding to the quantity/quality of laundry. A speed control processing part 7 calculates a motor driving current command value I* from revolving speed deviation epsilonN between the motor revolving speed N and the motor revolving speed internal command DELTAN* in comparison with this motor revolving speed internal command DELTAN*, a current control processing part 8 and a PWM processing part 9 performs the PWM of a motor driving signal from current deviation epsilonI between this motor driving current command value I* and a motor driving current value I, and the motor revolving speed N is controlled so as to be coincident with the motor revolving speed internal command value DELTAN*.

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