公开(公告)号：EP3216608A1

公开(公告)日：2017-09-13

申请号：EP17159234.8

申请日：2017-03-03

申请人： Ricoh Company, Ltd.

发明人： MASUI, Naruhiro

IPC分类号： B41J2/045

CPC分类号： B41J2/04588 ,  B41J2/04525 ,  B41J2/04536 ,  B41J2/04541 ,  B41J2/04581 ,  B41J2/04586 ,  B41J2/0459 ,  B41J2/04591 ,  B41J2/04593

摘要： A head driving device (31) drives a liquid ejection head (3, 14). The liquid ejection head (3, 14) includes a plurality of nozzles (104) and a plurality of pressure generating devices (112) provided respectively corresponding to the nozzles (104). The head driving device (31) includes a driving-waveform correcting unit (38) configured to correct driving waveform data that defines ejection characteristics of liquid to be ejected from the nozzle (104) based on interference patterns (FP1 to FP4, Xpl to XP6) expressing variations in the ejection characteristics caused by an interference occurring in the nozzle (104).

摘要翻译： 头驱动装置（31）驱动液体喷射头（3,14）。 液体喷射头（3,14）包括多个喷嘴（104）和分别对应于喷嘴（104）设置的多个压力产生装置（112）。 头驱动装置（31）包括驱动波形校正单元（38），该驱动波形校正单元被配置为基于干涉图案（FP1至FP4，Xpl至XP6）来校正定义从喷嘴（104）喷射的液体的喷射特性的驱动波形数据 ）表示由喷嘴（104）中发生的干涉引起的喷射特性的变化。

公开(公告)号：EP2326511B1

公开(公告)日：2018-08-29

申请号：EP09814706.9

申请日：2009-09-15

申请人： Ricoh Company, Ltd.

发明人： MASUI, Naruhiro

IPC分类号： G03G15/043 ,  G06K15/12 ,  H04N1/12 ,  H04N1/053 ,  G02B26/12 ,  H04N1/113

CPC分类号： H04N1/053 ,  G02B26/127 ,  G03G15/043 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/0082 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04772 ,  H04N2201/04784 ,  H04N2201/04786 ,  H04N2201/04794

摘要： A pixel clock generator includes a frequency divider 4 that generates a pixel clock PCLK based on a high frequency clock VCLK, a comparator 5 that calculates an error Lerr in the time obtained by integrating a cycle of the pixel clock PCLK for a target number RefN from a time when synchronization signals SPSYNC and EPSYNC are detected, a filter 6, and a frequency calculating unit 7 that sets a frequency dividing value M of the frequency divider 4. The filter 6 and the frequency calculating unit 7 calculate an average of a frequency of the pixel clock PCLK based on the error Lerr, determine a reference error value from the error Lerr in N-cycles, calculate offset values of the frequencies of N pieces of pixel clocks PCLK based on a difference between the reference error value and the error Lerr, and calculate the frequency dividing value M based on a result obtained by adding the circularly selected offset values and the average of the frequency of the pixel clock PCLK.

公开(公告)号：EP1635338A1

公开(公告)日：2006-03-15

申请号：EP04717829.8

申请日：2004-03-05

申请人： Ricoh Company, Ltd.

发明人： MASUI, Naruhiro

IPC分类号： G11B7/0045 ,  G11B7/125

CPC分类号： G11B7/126 ,  G11B7/0062 ,  G11B7/1267

摘要： In a method of transforming a recording power level into multi-levels by using an extra recording power level, the optimum value of each recording power level is obtained, thereby achieving recording with good accuracy.
By including a first test writing step (S1-S3) of performing test writing of predetermined first test data while varying the recording power in stages, and calculating an optimum recording power from the reproduction signal, and a second test writing step (S4-S6) of setting the recording power to the calculated optimum recording power and performing test writing of predetermined second test data while varying in stages the extra recording power applied in a part of a time period in which the optimum recording power is applied, and calculating an optimum extra recording power from the reproduction signal, the recording power and the extra recording power are separately calculated by test writing, and with which information is recorded, hence, it is possible to form the shape of a recording mark and the mark position with good accuracy, and recording can be performed with good accuracy.

摘要翻译： 在通过使用额外的记录功率电平将记录功率电平变换为多电平的方法中，获得每个记录功率电平的最佳值，从而以高精度实现记录。 通过包括在分级地改变记录功率的同时执行预定的第一测试数据的测试写入并根据再现信号计算最佳记录功率的第一测试写入步骤（S1-S3）和第二测试写入步骤（S4-S6 ）将记录功率设定为所计算的最佳记录功率，并且在分级施加了最佳记录功率的时间段的一部分中的额外记录功率的同时进行预定的第二测试数据的测试写入，并且计算最佳记录功率 通过测试写入分别计算来自再现信号的额外记录功率，记录功率和额外记录功率，并记录信息，因此，可以以良好的精度形成记录标记的形状和标记位置 ，并且可以以高精度执行记录。

公开(公告)号：EP2326511A1

公开(公告)日：2011-06-01

申请号：EP09814706.9

申请日：2009-09-15

申请人： Ricoh Company, Ltd.

发明人： MASUI, Naruhiro

IPC分类号： B41J2/44 ,  G02B26/12 ,  H04N1/113

CPC分类号： H04N1/053 ,  G02B26/127 ,  G03G15/043 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/0082 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04772 ,  H04N2201/04784 ,  H04N2201/04786 ,  H04N2201/04794

摘要： A pixel clock generator includes a frequency divider 4 that generates a pixel clock PCLK based on a high frequency clock VCLK, a comparator 5 that calculates an error Lerr in the time obtained by integrating a cycle of the pixel clock PCLK for a target number RefN from a time when synchronization signals SPSYNC and EPSYNC are detected, a filter 6, and a frequency calculating unit 7 that sets a frequency dividing value M of the frequency divider 4. The filter 6 and the frequency calculating unit 7 calculate an average of a frequency of the pixel clock PCLK based on the error Lerr, determine a reference error value from the error Lerr in N-cycles, calculate offset values of the frequencies of N pieces of pixel clocks PCLK based on a difference between the reference error value and the error Lerr, and calculate the frequency dividing value M based on a result obtained by adding the circularly selected offset values and the average of the frequency of the pixel clock PCLK.

公开(公告)号：EP2616887B1

公开(公告)日：2019-02-20

申请号：EP11825076.0

申请日：2011-09-02

申请人： Ricoh Company, Ltd.

发明人： MASUI, Naruhiro

IPC分类号： G03G15/01 ,  B41J2/525 ,  G03G15/16 ,  G03G21/14 ,  G06T1/00 ,  H04N1/46 ,  H04N1/60

公开(公告)号：EP1684269A1

公开(公告)日：2006-07-26

申请号：EP04792500.3

申请日：2004-10-15

申请人： Ricoh Company, Ltd.

发明人： YOKOI, Kenya ,  MASUI, Naruhiro

IPC分类号： G11B7/0045 ,  G11B7/125

CPC分类号： G11B7/1267 ,  G11B7/0062 ,  G11B7/00736

摘要： [Problem to be Solved]
Accurate recording is achieved by obtaining each optimum pulse width and pulse edge position in a recording method that performs recording according to the rules of recording waveform using different pulse widths and pulse edge positions for individual data length sets with respect to the data length sets having the different relationship between the number of pulses and the data length.
[Means for Solving the Problem]
The first trial write process obtains an optimum recording power of a test pattern (S1 through S3) even with respect to data having different rules for the recording waveforms corresponding n type data length sets, and the second trial write process using this optimum recording power obtains optimum pulse width or optimum pulse edge position separately for each data length set (S4 through S6). Based on the optimum recording power and optimum recording waveform obtained by these trial write processes, recording operation is performed so as to form all the data lengths with satisfactory accuracy, thereby making it possible to obtain a proper reproduced signal.

摘要翻译： [待解决的问题]通过在记录方法中获得每个最佳脉冲宽度和脉冲边缘位置来实现准确的记录，所述记录方法根据记录波形的规则，使用不同的脉冲宽度和脉冲边缘位置对于各个数据长度集相对于 数据长度集具有脉冲数与数据长度之间的不同关系。 [解决问题的手段]即使对于与n种数据长度集相对应的记录波形的规则不同的数据，第一试写法也能够获得测试图形（S1至S3）的最佳记录功率，而第二试写 使用该最佳记录功率的处理针对每个数据长度集（S4至S6）分别获得最佳脉冲宽度或最佳脉冲边缘位置。 基于通过这些试写步骤获得的最佳记录功率和最佳记录波形，执行记录操作以便以令人满意的精度形成所有数据长度，从而可以获得适当的再现信号。