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1. 发明申请

WO2011030842A1 DEAD-TIME GENERATING CIRCUIT AND MOTOR CONTROL APPARATUS 审中-公开
标题翻译：死机发电电路和电机控制装置
公开(公告)号：WO2011030842A1
公开(公告)日：2011-03-17
申请号：PCT/JP2010/065570
申请日：2010-09-03
申请人： RICOH COMPANY, LTD. , UEDA, Yasuo , TOKUDA, Masashi , TSUKAGOSHI, Toshihiro
发明人： UEDA, Yasuo , TOKUDA, Masashi , TSUKAGOSHI, Toshihiro
IPC分类号： H02M7/537
CPC分类号： H02M1/38 , H03K5/1515 , H03K17/16
摘要： A dead-time generating circuit includes a constant current circuit; a current generating circuit generating a capacitor-charge current; and a control circuit receiving a dead time control signal and a comparator signal. The control circuit generates a dead time generating signal based on the dead time control signal and the comparator signal, and a charge/discharge signal based on the dead time generating signal. Charging or discharging of a capacitor is controlled by the capacitor-charge current in accordance with the charge/discharge signal. A voltage of the capacitor is compared with a threshold voltage in order to generate a comparator signal when the voltage of the capacitor exceeds the threshold voltage. The control circuit generates the charge/discharge signal for a duration starting from a time when the delay time has elapsed from the rise or fall timing of the dead time control signal until the control circuit receives the comparator signal.
摘要翻译：死时间发生电路包括恒流电路; 产生电容器充电电流的电流产生电路; 以及接收死区时间控制信号和比较器信号的控制电路。控制电路基于死区时间控制信号和比较器信号产生死区时间产生信号，并且基于死区时间产生信号产生充电/放电信号。电容器的充电或放电根据充电/放电信号由电容器充电电流控制。将电容器的电压与阈值电压进行比较，以便当电容器的电压超过阈值电压时产生比较器信号。控制电路在从死区时间控制信号的上升或下降定时经过延迟时间直到控制电路接收到比较器信号为止的时间开始产生充电/放电信号。

2. 发明公开

EP0776569A1 METHOD AND SYSTEM FOR ENCODING AND DECODING IMAGE DATA 失效
标题翻译：方法和系统编码和解码的影像数据
公开(公告)号：EP0776569A1
公开(公告)日：1997-06-04
申请号：EP96917705.0
申请日：1996-06-17
申请人： Ricoh Company, Ltd
发明人： RYU, Tadanori , TOKUDA, Masashi
IPC分类号： H04N1 , G06T9 , H03M7
CPC分类号： H03M7/48 , G06T9/005 , H04N1/41
摘要： Image data which is to be compressed (to-be-compressed image data) is encoded repeatedly using a respective one of a plurality of templates. The compression rates of encoded data of each template are compared with each other. The encoded data with the highest compression rate is used and the corresponding template identification is output with the encoded data. The encoding comprises entropy coding. To-be-compressed data comprises video game software programs.

3. 发明公开

EP3209009A1 OPTICAL WRITING DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME 有权
标题翻译：光学写入装置和包含该装置的图像形成装置
公开(公告)号：EP3209009A1
公开(公告)日：2017-08-23
申请号：EP17156074.1
申请日：2017-02-14
申请人： Ricoh Company, Ltd.
发明人： TOKUDA, Masashi
IPC分类号： H04N1/047 , H04N1/053
CPC分类号： G03G15/04036 , H04N1/047 , H04N1/053 , H04N1/06 , H04N1/295 , H04N2201/0091 , H04N2201/047 , H04N2201/0471
摘要： An optical writing device (3) and an image forming apparatus (1, 5) incorporating the optical writing device (3). The optical writing device (3) includes two or more light sources (31a), a pixel clock generator (323) to measure a scanning speed of one of the two or more light sources (31a) and generate a pixel clock of a cycle corrected according to the measured scanning speed, a pulse data generation and output unit (324) to generate pulse width data and shift data for the pixel clock generated by the pixel clock generator (323) to output the generated pulse width data and the generated shift data for each one of the two or more light sources (31a), and a plurality of image pulse generation and output units (325) to generate an image pulse. In the optical writing device (3), the plurality of image pulse generation and output units (325) are supplied with the pixel clock in common.
摘要翻译：一种光学写入装置（3）和包含该光学写入装置（3）的图像形成装置（1,5）。光学写入装置（3）包括两个或更多个光源（31a），像素时钟发生器（323），用于测量两个或更多个光源（31a）中的一个光源的扫描速度并产生校正周期的像素时钟根据所测量的扫描速度产生脉冲数据产生和输出单元（324），以产生由像素时钟发生器（323）产生的像素时钟的脉冲宽度数据和移位数据，以输出产生的脉冲宽度数据和产生的移位数据对于两个或更多个光源（31a）中的每一个，以及多个图像脉冲产生和输出单元（325）以产生图像脉冲。在光学写入装置（3）中，多个图像脉冲产生和输出单元（325）被共同提供有像素时钟。

4. 发明授权

EP0776569B1 METHOD AND SYSTEM FOR ENCODING AND DECODING IMAGE DATA 失效
标题翻译：方法和系统编码和解码的影像数据
公开(公告)号：EP0776569B1
公开(公告)日：2002-10-30
申请号：EP96917705.4
申请日：1996-06-17
申请人： Ricoh Company Ltd.
发明人： RYU, Tadanori , TOKUDA, Masashi
IPC分类号： H04N1/41 , H03M7/40
CPC分类号： H03M7/48 , G06T9/005 , H04N1/41
摘要： Image data which is to be compressed (to-be-compressed image data) is encoded repeatedly using a respective one of a plurality of templates. The compression rates of encoded data of each template are compared with each other. The encoded data with the highest compression rate is used and the corresponding template identification is output with the encoded data. The encoding comprises entropy coding. To-be-compressed data comprises video game software programs.

5. 发明授权

EP2476195B8 DEAD-TIME GENERATING CIRCUIT AND MOTOR CONTROL APPARATUS 有权
标题翻译：死时间发生电路和电机控制装置
公开(公告)号：EP2476195B8
公开(公告)日：2018-03-28
申请号：EP10815437.8
申请日：2010-09-03
申请人： Ricoh Company, Ltd.
发明人： UEDA, Yasuo , TOKUDA, Masashi , TSUKAGOSHI, Toshihiro
IPC分类号： H02M1/38 , H03K5/151 , H03K17/16 , H02M7/537
CPC分类号： H02M1/38 , H03K5/1515 , H03K17/16
摘要： A dead-time generating circuit includes a constant current circuit; a current generating circuit generating a capacitor-charge current; and a control circuit receiving a dead time control signal and a comparator signal. The control circuit generates a dead time generating signal based on the dead time control signal and the comparator signal, and a charge/discharge signal based on the dead time generating signal. Charging or discharging of a capacitor is controlled by the capacitor-charge current in accordance with the charge/discharge signal. A voltage of the capacitor is compared with a threshold voltage in order to generate a comparator signal when the voltage of the capacitor exceeds the threshold voltage. The control circuit generates the charge/discharge signal for a duration starting from a time when the delay time has elapsed from the rise or fall timing of the dead time control signal until the control circuit receives the comparator signal.

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