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91. 发明专利

JP2004237663A Pixel clock producing circuit and image forming apparatus 有权
公开(公告)号：JP2004237663A
公开(公告)日：2004-08-26
申请号：JP2003031057
申请日：2003-02-07
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NIHEI YASUHIRO , ISHIDA MASAAKI , OMORI JUNJI , KOZASA MADOKA
IPC分类号： B41J2/44 , G02B26/10 , G02B26/12 , H03L7/06 , H03L7/07 , H03L7/08 , H03L7/091
CPC分类号： H03L7/08 , G02B26/127 , H03L7/07 , H03L7/091 , H03L2207/50
摘要： PROBLEM TO BE SOLVED: To perform the phase control of a pixel clock synchronized in phase by a simple constitution.
SOLUTION: This pixel clock producing circuit is equipped with a means 11 for producing a high periodic clock VCLK, a means 15 for outputting a horizontal synchronizing signal which shows the output start timing of the pixel clock as a phase synchronizing signal synchronized with VCLK, a means 12 for detecting the rising or falling of the phase synchronizing signal or the pixel clock PCLK and outputting a pulse signal with one clock width of UCLK as a detection signal, a means 13 for producing control signals (a) and (b) based on phase data for indicating the transition timing of the detection signal and PCLK, and a means 14 for performing the transition of the pixel clock based on the control signals (a) and (b).
COPYRIGHT: (C)2004,JPO&NCIPI

92. 发明专利

JP2004114318A Device for generating pixel clock and pulse modulation signal, optical scanning device, and image formation apparatus 有权
标题翻译：用于产生像素时钟和脉冲调制信号，光学扫描装置和图像形成装置的装置
公开(公告)号：JP2004114318A
公开(公告)日：2004-04-15
申请号：JP2002276712
申请日：2002-09-24
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NIHEI YASUHIRO , ISHIDA MASAAKI
IPC分类号： B41J2/44 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To realize generation and highly precise phase control of pixel clocks, and moreover generation of pulse modulation signals optimum in the case of modulating optical outputs of a laser light source or the like. SOLUTION: The device for generating pixel clocks and pulse modulation signals includes a high frequency clock generating means 10 for generating high frequency clocks, a pixel clock generating means 11 for generating pixel clocks by changing a cycle of pixel clocks on the basis of phase data which indicate a transition timing of high frequency clocks and pixel clocks, a modulation data generating means 12 for inputting image data and generating modulation data which represent a desired bit pattern by the image data, and a serial modulation signal generating means 13 for inputting modulation data and outputting pulse modulation signals of a serial pulse train on the basis of high frequency clocks. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了实现像素时钟的生成和高度精确的相位控制，并且在调制激光光源的光学输出等的情况下产生最佳的脉冲调制信号。解决方案：用于产生像素时钟和脉冲调制信号的装置包括用于产生高频时钟的高频时钟产生装置10，用于通过基于以下方式改变像素时钟的周期来产生像素时钟的像素时钟产生装置11：指示高频时钟和像素时钟的转换定时的相位数据，用于输入图像数据并生成表示图像数据的期望比特模式的调制数据的调制数据产生装置12，以及用于输入图像数据的串行调制信号发生装置13 调制数据，并根据高频时钟输出串行脉冲串的脉冲调制信号。版权所有（C）2004，JPO

93. 发明专利

JP2004074518A Image forming apparatus 审中-公开
公开(公告)号：JP2004074518A
公开(公告)日：2004-03-11
申请号：JP2002236279
申请日：2002-08-14
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： HAYASHI YOSHIAKI , SUZUKI SEIZO , NAKAJIMA TOMOHIRO , SUZUKI MITSUO , ISHIDA MASAAKI
IPC分类号： B41J2/44 , G03G15/01 , G03G15/04 , G03G21/14 , H04N1/036 , H04N1/113 , H04N1/23
摘要： PROBLEM TO BE SOLVED: To obtain an image forming apparatus in which a dot position can be corrected with high precision even if the dot position is shifted on a recording medium due to aging. SOLUTION: The image forming apparatus comprises a means 17 for measuring the position of a measurement pattern image 15 formed on a recording medium 9, and light receiving means 10 and 11 for measuring a beam in an optical scanner. The light receiving means 10, 11 measures the beam when the optical scanner performs exposure in order to form the measurement pattern image 15. The imaging apparatus further comprises a means for storing correlation information of measurement data of the pattern image 15 and measurement data of the beam from the light receiving means 10, 11, and a means for correcting the dot position based on the correlation information thus stored and the measurement data measure only by the light receiving means 10, 11. COPYRIGHT: (C)2004,JPO

94. 发明专利

JP2003341125A Pixel clock generator, laser scanner and imaging apparatus 有权
标题翻译：像素时钟发生器，激光扫描仪和成像装置
公开(公告)号：JP2003341125A
公开(公告)日：2003-12-03
申请号：JP2002152029
申请日：2002-05-27
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NIHEI YASUHIRO , ISHIDA MASAAKI
IPC分类号： B41J2/44
摘要： PROBLEM TO BE SOLVED: To provide a pixel clock generator in which phase control of a pixel clock can be carried out in detail through a simple arrangement, a laser scanner mounting the pixel clock generator, and an imaging apparatus.
SOLUTION: From control data 1 and 2 created based on phase data indicative of the amount of phase shift of the pixel clock (PCLK) and the state of the pixel clock (PCLK), a first clock making a state transition in synchronism with the rising timing of a high frequency clock (VCLK), and a second clock making a state transition in synchronism with the falling timing are generated. Any one of them is selected based on bit 0 of the phase data and state transition of the pixel clock (PCLK) and outputted as the pixel clock (PCLK).
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种像素时钟发生器，其中可以通过简单的布置详细地执行像素时钟的相位控制，安装像素时钟发生器的激光扫描仪和成像装置。解决方案：从基于指示像素时钟（PCLK）的相移量和像素时钟（PCLK）的状态）的相位数据创建的控制数据1和2，同步地进行状态转换的第一时钟产生高频时钟（VCLK）的上升定时，并产生与下降定时同步的状态转换的第二时钟。它们中的任何一个基于相位数据的位0和像素时钟（PCLK）的状态转换被选择并被输出作为像素时钟（PCLK）。版权所有（C）2004，JPO

95. 发明专利

JP2003322810A Pixel clock generator, optical scanner, image forming apparatus, and method for correcting displacement of main scan dot 审中-公开
标题翻译：像素时钟发生器，光学扫描仪，图像形成装置和校正主扫描位移的方法
公开(公告)号：JP2003322810A
公开(公告)日：2003-11-14
申请号：JP2002129493
申请日：2002-05-01
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ATSUMI HIROMICHI , ISHIDA MASAAKI , AOKI MASAKANE , OMORI JUNJI , SUZUKI SEIZO
IPC分类号： B41J2/44 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To set a control value when phases of the respective signals of a pixel clock for forming an image are shifted on the basis of phase data at the timing of a clock signal from a high frequency clock generation means, and to correct the displacement of a main scan dot based on the control value. SOLUTION: The pixel clock generator circuit is provided with a high frequency clock generator circuit 1 and clock generation circuits 4, 7. The pixel clock generator circuit sets the control value with respect to the data to be subjected to a phase shift so that the displacement of the main scan dot due to a work error and an assembly error, etc., of an optical element constituting an optical scanner is corrected when the phases of the respective signals of the pixel clock for forming the image are shifted on the basis of the phase data at the timing of a high frequency clock signal VCLK, and outputs a pixel clock PCLK subjected to the phase shift by selecting either one of a clock 1 or a clock 2 on the basis of the control value, then the displacement of the main scan dot is corrected by the outputted pixel clock PCLK. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了在来自高频时钟产生装置的时钟信号的定时基于相位数据偏移用于形成图像的像素时钟的相应信号的相位来设置控制值，并且基于控制值来校正主扫描点的位移。解决方案：像素时钟发生器电路设置有高频时钟发生器电路1和时钟发生电路4,7。像素时钟发生器电路相对于要进行相移的数据设置控制值，因此当构成光学扫描器的光学元件的各个信号的相位在第一个像素时钟的相位被移位时，校正由于工作误差导致的主扫描点的位移和构成光学扫描器的光学元件的组装误差等在高频时钟信号VCLK的定时处的相位数据的基础，并且基于控制值选择经受相移的像素时钟PCLK，时钟1或时钟2中的任一个，然后移位的主扫描点由输出的像素时钟PCLK校正。版权所有（C）2004，JPO

96. 发明专利

JP2003159540A MILL FOR COARSE AGGREGATE 审中-公开
公开(公告)号：JP2003159540A
公开(公告)日：2003-06-03
申请号：JP2001361199
申请日：2001-11-27
申请人： MITSUBISHI MATERIALS CORP
发明人： HASHIMOTO KOICHI , TAKASAKI MICHIO , NISHIMURA YUSUKE , SATO SHINICHIRO , ISHIDA MASAAKI
IPC分类号： B09B5/00 , B02C17/02 , B02C17/18 , B02C17/22 , B02C19/00 , B09B3/00 , C04B18/16 , B02C19/12
摘要： PROBLEM TO BE SOLVED: To improve the durability of a screen. SOLUTION: This mill 5 for coarse aggregate is constructed so that an inner cylinder 51 containing grinding/kneading media 53 is pivotably rotated to grind/ knead a concrete mass B fed into the inner cylinder 51 and coarse aggregate E is separated from the concrete mass B. A plurality of through-holes 51a having such a size that does not permit passage of the grinding/kneading media 53 therethrough is provided in the inner cylinder 51, and a wire gauze (a screen) 54, which permits the passage of mortar (concrete material) D having a predetermined size or smaller produced by grinding/kneading of the concrete mass B therethrough, is provided on the outer wall surface of the inner cylinder 51. COPYRIGHT: (C)2003,JPO

97. 发明专利

JP2003110189A SEMICONDUCTOR LASER CONTROLLER 审中-公开
公开(公告)号：JP2003110189A
公开(公告)日：2003-04-11
申请号：JP2001305303
申请日：2001-10-01
申请人： RICOH KK
发明人： OMORI JUNJI , ISHIDA MASAAKI
IPC分类号： B41J2/44 , G03G15/04 , G03G15/043 , H01S5/0683
摘要： PROBLEM TO BE SOLVED: To provide a structure capable of preventing the formation of an electrostatic latent image due to offset light emission in an non-image area and substrate contamination due to the attachment of toner, in an image forming apparatus. SOLUTION: A means 34 is provided which sets an offset level control signal for determining an offset current at the time of offset light emission of a semiconductor laser PD to a desired value according to the characteristics, types, individual differences or the like of a semiconductor laser.

98. 发明专利

JP2002252411A ELECTRONIC DEVICE, OPTICAL OUTPUT CONTROL DEVICE AND ELECTRONIC APPARATUS 失效
公开(公告)号：JP2002252411A
公开(公告)日：2002-09-06
申请号：JP2001051134
申请日：2001-02-26
申请人： RICOH KK
发明人： ISHIDA MASAAKI , EMA HIDETOSHI
IPC分类号： B41J2/44 , G11B7/125 , H01S5/062 , H01S5/0683
摘要： PROBLEM TO BE SOLVED: To provide an electronic device which can constitute a high precision and high-speed feedback loop; an optical output control circuit using the same, and an electronic apparatus in the electronic device which controls output lights of a light-emitting device to output; the optical output control circuit using the same; and the electronic apparatus. SOLUTION: In the optical output control circuit 1 which control the output lights from the light-emitting device 12, there are provided a light-receiving part 21 for outputting a detection signal in correspondence to incident light; a compensation part 22 for compensating the detection signal so as to change linearly the detection signal for the incident light; and a control circuit part 23 which controls the detection signal obtained by compensating an input signal by the compensation part 22 in correspondence to the detection signal to output.

99. 发明专利

JP2002120352A LIQUID SUPPLY APPARATUS 失效
公开(公告)号：JP2002120352A
公开(公告)日：2002-04-23
申请号：JP2000312976
申请日：2000-10-13
申请人： KOMORI PRINTING MACH
发明人： ISHIDA MASAAKI , EBINA TOSHIHIKO
IPC分类号： B41F21/04 , B41F15/08 , B41F15/22
摘要： PROBLEM TO BE SOLVED: To provide a liquid supply apparatus capable of well supplying a liquid to the sheetlike article held to an impression cylinder from a liquid supply cylinder. SOLUTION: A support bar 110 having a pawl stand 111 is arranged in the notch part 101a of a cylinder main body 101 of an impression cylinder 100 so as to movable in the diameter direction of the cylinder main body, and the fixed cam 112 fixed to the main body frame 2 and a movable cam 113 revolvable in a peripheral direction with respect to the main body frame 2 through the fixed cam 112 are provided while a cam follower 120 is provided on the leading end side of the support rod 110a of the support bar 110 projected from the cylinder main body 101. The support rod 110a and the locking pin 119 provided to the end surface of the cylinder main body 101 are connected by a tensile coil spring 118 and the cam follower 120 is always brought into contact with the cam surfaces 112a and 113a of the fixed cam 112 and the movable cam 113.

100. 发明专利

JP2001284703A SEMICONDUCTOR LASER CONTROL DEVICE, IMAGE FORMING DEVICE AND OPTICAL DISK DEVICE 失效
公开(公告)号：JP2001284703A
公开(公告)日：2001-10-12
申请号：JP2000097521
申请日：2000-03-31
申请人： RICOH KK
发明人： ISHIDA MASAAKI , EMA HIDETOSHI
IPC分类号： B41J2/44 , G11B7/125 , H01S5/026 , H01S5/0683 , H04N1/113 , H04N1/23
摘要： PROBLEM TO BE SOLVED: To provide a semiconductor laser control device wherein influence of arrangement from a light receiving part to an optical/electrical negative feedback loop is eliminated and the optical/electrical negative feedback loop of high speed and high precision can be realized at a low cost. SOLUTION: The light receiving part 3 and a comparison amplifying part 4 as a control part of the optical/electrical negative feedback loop 5 are constituted on the same integrated circuit 6. Consequently, influence such as deterioration of speed due to a wiring between the light receiving part 3 and the comparison amplifying part 4, deterioration of frequency characteristic due to impedance component and parasitic capacitance and noise mixed in the wiring is excluded, and influence of arrangement from the light receiving part 3 to the comparison amplifying part 4 can be eliminated.

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