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1. 发明专利

JP2008182751A Method for converting input waveform into output waveform 审中-公开
标题翻译：将输入波形转换为输出波形的方法
公开(公告)号：JP2008182751A
公开(公告)日：2008-08-07
申请号：JP2008064336
申请日：2008-03-13
申请人： Texas Instr Inc , テキサスインスツルメンツインコーポレイテツド
发明人： MOZIO FRANK J , MUSALL EDWARD C , WAND MARTIN A , JENKINS STEVE T
IPC分类号： B41J29/46 , H04N1/40 , G01R23/02 , G06T3/40 , H03L7/00 , H04N1/047
CPC分类号： H03L7/00 , H04N1/047 , H04N1/40068 , H04N2201/02439 , H04N2201/0471 , H04N2201/04724 , H04N2201/04731 , H04N2201/04734 , H04N2201/04775 , H04N2201/04794
摘要： PROBLEM TO BE SOLVED: To make an output frequency non-integer relation to an input frequency. SOLUTION: A method and system for digital resolution translation is described. An input frequency is received, as is a desired output frequency. The desired output frequency is measured directly and compared with the input frequency. After that, the output frequency is adjusted to compensate for variations in the input frequency. This can be performed by using an optional relation between the input and the output frequencies as necessary. When a system sets an execution loop (54) and a loop count reaches a pre-arranged threshold, an adjusted output frequency is sent as an operating signal to the system. Then, the system resets the count to zero and resumes the execution of the loop. The system continues this cycle until it can no longer accept an input frequency. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：与输入频率进行输出频率非整数关系。解决方案：描述了用于数字分辨率转换的方法和系统。接收输入频率，如期望的输出频率。所需的输出频率直接测量并与输入频率进行比较。之后，调整输出频率以补偿输入频率的变化。这可以通过在必要时使用输入和输出频率之间的可选关系来执行。当系统设置执行循环（54）并且循环计数达到预先设置的阈值时，将调整的输出频率作为操作信号发送到系统。然后，系统将计数重置为零，并恢复循环的执行。系统继续此循环，直到它不再接受输入频率。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JP5593749B2 Pixel clock generation apparatus, an image forming apparatus 有权
公开(公告)号：JP5593749B2
公开(公告)日：2014-09-24
申请号：JP2010055009
申请日：2010-03-11
申请人：株式会社リコー
发明人：成博増井
IPC分类号： B41J2/47 , G02B26/10 , H04N1/113 , H04N1/23
CPC分类号： H04N1/053 , G02B26/123 , G02B26/127 , G03G15/04072 , G06K15/1219 , H04N1/1135 , H04N1/506 , H04N2201/0471 , H04N2201/04729 , H04N2201/04734 , H04N2201/04744 , H04N2201/04768 , H04N2201/04772 , H04N2201/04774 , H04N2201/04775 , H04N2201/04784 , H04N2201/04789 , H04N2201/04793 , H04N2201/04794 , H04N2201/04798
摘要： A pixel clock generating device includes a time interval detection unit detecting a time interval between a first signal and a second signal in each of cyclically repeating N (‰§ 2) time periods; a comparing unit cyclically selecting a target value from N target values corresponding to the N time periods and outputting an error indicating a difference between the detected time interval and the selected target value for each of the N time periods; a frequency calculation unit correcting a frequency of the pixel clock signal based on the error and cyclically generating a frequency specification signal indicating the corrected frequency for each of the N time periods; a high-frequency clock generating unit generating a high-frequency clock signal; and a pixel clock generating unit generating a pixel clock signal based on the frequency specification signal and the high-frequency clock signal.

3. 发明专利

JP5078836B2 Optical scanning device and an image forming apparatus 有权
公开(公告)号：JP5078836B2
公开(公告)日：2012-11-21
申请号：JP2008266817
申请日：2008-10-15
申请人：株式会社リコー
发明人：忠司仲村
IPC分类号： G02B26/10 , B41J2/44 , H04N1/036 , H04N1/113
CPC分类号： H04N1/053 , H04N1/1135 , H04N1/12 , H04N2201/0082 , H04N2201/02443 , H04N2201/0471 , H04N2201/04732 , H04N2201/04744 , H04N2201/04775 , H04N2201/04798
摘要： A first main-scanning-position correction unit divides a surface to be scanned into first areas in a main scanning direction into areas, sets a separate clock-pulse timing for first area, and corrects a main-scanning position error. A second main-scanning-position correction unit divides the surface into second areas in the main scanning direction based on first-scanning-position correction data, sets a separate clock-pulse timing for each second area, and corrects the main-scanning position error.

4. 发明专利

JP2010096926A Optical scanning device and image forming apparatus 有权
标题翻译：光学扫描装置和图像形成装置
公开(公告)号：JP2010096926A
公开(公告)日：2010-04-30
申请号：JP2008266817
申请日：2008-10-15
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NAKAMURA TADASHI
IPC分类号： G02B26/10 , B41J2/44 , H04N1/036 , H04N1/113
CPC分类号： H04N1/053 , H04N1/1135 , H04N1/12 , H04N2201/0082 , H04N2201/02443 , H04N2201/0471 , H04N2201/04732 , H04N2201/04744 , H04N2201/04775 , H04N2201/04798
摘要： PROBLEM TO BE SOLVED: To obtain an optical scanning device in which the deterioration of image quality is prevented, by fixing a light source driving pattern having a large number of divisions for main-scanning-position error correction of a designed central value, and correcting only the main scanning positional error due to the variation in the tolerance, by referring to a variable table having a small number of divisions, and to provide an image forming apparatus.
SOLUTION: The optical scanning device includes: a deflection unit 106, which scanningly deflects a luminous flux from a light source by sine oscillation; a surface to be scanned by the deflected luminous flux; a first main-scanning-position error correction unit 402, which divides the face to be scanned by a first division number in a main scanning direction, individually setting a clock pulse timing for every divided region of the first division number, and corrects the main-scanning-position error; and a second main-scanning-position error correction unit 401, which divides the face to be scanned by a second division number in the main scanning direction, individually setting the clock pulse timing for each divided region of the second division number, and corrects the main-scanning position error, on the basis of the first main-scanning position correction data.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题为了获得防止图像质量劣化的光学扫描装置，通过将具有大数量的分割的光源驱动图案固定成用于设计的中心值的主扫描位置误差校正并且通过参考具有少量分割的可变表来仅校正由于公差的变化引起的主扫描位置误差，并提供图像形成装置。光学扫描装置包括：偏转单元106，其通过正弦振荡从光源扫描地偏转光束; 由偏转的光通量扫描的表面; 第一主扫描位置误差校正单元402，其将主扫描方向上的第一分割数除以待扫描的脸部，分别设置第一分割数的每个分割区域的时钟脉冲定时，并校正主扫描位置误差校正单元402。扫描位置误差; 以及第二主扫描位置误差校正单元401，其将主扫描方向上的第二分割数除以待扫描的脸部，分别设置第二分割数的每个分割区域的时钟脉冲定时，并校正主扫描位置误差，基于第一主扫描位置校正数据。版权所有（C）2010，JPO＆INPIT

5. 发明专利

JP2011189514A Pixel clock-generating device, and image forming apparatus 有权
标题翻译：像素时钟生成装置和图像形成装置
公开(公告)号：JP2011189514A
公开(公告)日：2011-09-29
申请号：JP2010055009
申请日：2010-03-11
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： MASUI NARIHIRO
IPC分类号： B41J2/44 , G02B26/10 , H04N1/113 , H04N1/23
CPC分类号： H04N1/053 , G02B26/123 , G02B26/127 , G03G15/04072 , G06K15/1219 , H04N1/1135 , H04N1/506 , H04N2201/0471 , H04N2201/04729 , H04N2201/04734 , H04N2201/04744 , H04N2201/04768 , H04N2201/04772 , H04N2201/04774 , H04N2201/04775 , H04N2201/04784 , H04N2201/04789 , H04N2201/04793 , H04N2201/04794 , H04N2201/04798
摘要： PROBLEM TO BE SOLVED: To provide a pixel clock-generating device which generates a pixel clock capable of highly accurately correcting each of errors even when the different errors of a scanning speed are generated at optical scan positions in an image forming apparatus in which one light source optically scans two or more plural optical scan positions shifting in time. SOLUTION: The pixel clock-generating device 111, which generates the pixel clock to be a processing timing of pixels, has: time interval-detecting means 2 and 3 which detect a time interval of signals cyclically detected by timing-detecting means 108 and 109; a comparing means 5 which cyclically changes N (≥2) target values, compares the time interval with the target value and outputs an error from the target value; a frequency operating means 7 which cyclically operates a frequency indication signal of a pixel clock frequency that suppresses the error for each of N target values outputted by the comparing means; a high-frequency clock-generating means 1 which generates a high-frequency clock; and a pixel clock-generating means 4 which generates the pixel clock in accordance with the frequency indication signal on the basis of the high-frequency clock. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：解决的问题：提供一种像素时钟生成装置，其生成能够高精度地校正每个错误的像素时钟，即使当在图像形成装置中的光学扫描位置处产生扫描速度的不同误差时该一个光源光学地扫描在时间上移动的两个或多个多个光学扫描位置。＆lt; P＆gt;解决方案：将像素时钟生成为像素的处理定时的像素时钟生成装置111具有：时间间隔检测装置2和3，其检测由定时检测装置循环检测的信号的时间间隔 108和109; 循环地改变N（≥2）个目标值的比较装置5将时间间隔与目标值进行比较，并从目标值输出误差; 频率操作装置7，循环地操作像素时钟频率的频率指示信号，该频率指示信号抑制由比较装置输出的N个目标值中的每一个的误差; 产生高频时钟的高频时钟发生装置1; 以及像素时钟生成单元4，根据高频时钟根据频率指示信号生成像素时钟。版权所有（C）2011，JPO＆INPIT

6. 发明专利

JP2007118279A Optical device and image forming apparatus 有权
标题翻译：光学装置和图像形成装置
公开(公告)号：JP2007118279A
公开(公告)日：2007-05-17
申请号：JP2005311139
申请日：2005-10-26
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SHUKUTANI YUICHIRO
IPC分类号： B41J2/44 , G02B26/10 , H04N1/113 , H04N1/23
CPC分类号： H04N1/053 , H04N1/1135 , H04N1/12 , H04N1/506 , H04N2201/0471 , H04N2201/04732 , H04N2201/04744 , H04N2201/04768 , H04N2201/04775 , H04N2201/04781 , H04N2201/04786
摘要： PROBLEM TO BE SOLVED: To provide an optical device which performs color matching correction in the writing of an image, and an image forming apparatus.
SOLUTION: When a counter is cleared by a detection signal DETP_N of a synchronization detecting plate 31b, a measurement clock ICLK is counted by the counter 71. The count number N of the counter 71 is output to a control part 72 according to a detection signal EDETP_N of a back-end synchronization detecting plate 61 (step S1301). Next, the control part 72 compares the measured count number N with a preset reference count number N0 (step S1302). Subsequently, a count number N' for use in the correction of a main scanning magnification is computed by the expression: N'=N-3/4 (step S1303). A writing clock frequency f' after the correction is computed by the expression: f'=f×N0/N' (step S1304). This can avoid an influence exerted on the main scanning magnification by the correction brought about by a phase-variable function.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种在写入图像时执行颜色匹配校正的光学装置和图像形成装置。解决方案：当计数器被同步检测板31b的检测信号DETP_N清零时，计数器71对测量时钟ICLK进行计数。计数器71的计数N根据后端同步检测板61的检测信号EDETP_N（步骤S1301）。接下来，控制部分72将测量的计数N与预设的参考计数数N0进行比较（步骤S1302）。随后，通过以下表达式计算用于校正主扫描倍率的计数数N'：N'= N-3/4（步骤S1303）。校正后的写入时钟频率f'由以下表达式计算：f'= f×N0 / N'（步骤S1304）。这可以通过由相变功能引起的校正来避免对主扫描放大率的影响。版权所有（C）2007，JPO＆INPIT

7. 发明专利

JP3744301B2 Image reading device 有权
公开(公告)号：JP3744301B2
公开(公告)日：2006-02-08
申请号：JP2000035038
申请日：2000-02-14
申请人：コニカミノルタビジネステクノロジーズ株式会社
发明人：孝二塚田
IPC分类号： H04N1/028 , H04N1/053 , H04N1/19 , H04N1/193 , H04N5/335 , H04N5/341 , H04N5/372 , H04N5/376 , H04N5/378
CPC分类号： H04N1/053 , H04N1/193 , H04N2201/04772 , H04N2201/04774 , H04N2201/04775
摘要： An image reading apparatus according to the present invention allows the period of generation of a load signal NRD, the load value in counter circuits 21 and 31 , and the comparative value in pulse generator circuits 22 and 32 to be changed corresponding to the multiplication rate of a PLL circuit 14 . Accordingly, the pulse width and the phase length of the signals generated in signal generator circuits 12 A and 12 B are enhanced in the controllable accuracy by increasing the multiplication rate of the PLL circuit 14 . Hence, even if the driving frequency is lowered, the pulse width and the phase length of the signals generated in signal generator circuits 12 A and 12 B can favorably be maintained in the controllable accuracy.

8. 发明专利

JP4808004B2 Optical device, and an image forming apparatus 有权
公开(公告)号：JP4808004B2
公开(公告)日：2011-11-02
申请号：JP2005311139
申请日：2005-10-26
申请人：株式会社リコー
发明人：祐一郎宿谷
IPC分类号： B41J2/44 , G02B26/10
CPC分类号： H04N1/053 , H04N1/1135 , H04N1/12 , H04N1/506 , H04N2201/0471 , H04N2201/04732 , H04N2201/04744 , H04N2201/04768 , H04N2201/04775 , H04N2201/04781 , H04N2201/04786
摘要： An image forming apparatus includes a light source, a deflector, beam detectors, a clock generator, a measurement mechanism, a frequency corrector, and a phase corrector. The light source illuminates in response to image data. The deflector deflects an optical beam into a scanning beam. The beam detectors including first and second beam detectors detect the scanning beam. The clock generator generates writing clock signals. The measurement mechanism measures a count number of the writing clock signals generated during a period between the scanning beam is detected by the first and second beam detectors. The frequency corrector corrects a frequency of the writing clock signals such that the count number measured becomes substantially equivalent to a predetermined number. The phase corrector varies a phase of the writing clock signals such that the count number is substantially constant before and after the phase of the writing clock signals is varied.

9. 发明专利

JP4343550B2 Image forming apparatus 有权
公开(公告)号：JP4343550B2
公开(公告)日：2009-10-14
申请号：JP2003046253
申请日：2003-02-24
申请人：キヤノン株式会社
发明人：治彦中津
IPC分类号： B41J2/44 , G03G21/14 , G03G15/00 , G03G15/04 , G03G15/043 , G03G15/16 , H04N1/053 , H04N1/113 , H04N1/12 , H04N1/23 , H04N1/29
CPC分类号： G03G15/326 , G03G15/0435 , H04N1/053 , H04N1/1135 , H04N1/12 , H04N1/506 , H04N2201/02439 , H04N2201/0471 , H04N2201/04712 , H04N2201/04717 , H04N2201/04722 , H04N2201/04732 , H04N2201/04744 , H04N2201/04767 , H04N2201/04774 , H04N2201/04775 , H04N2201/04786 , H04N2201/04794
摘要： A high-quality image forming apparatus that is capable of accurately adjusting the size and position of an image during image formation on a second surface of a transfer material, even when there has been expansion/contraction of the transfer material due to thermal fixing after image formation on a first surface thereof, to thereby avoid image displacement during two-sided image formation and multiple image formation. A pulse adjusting section sets a second number of pulses of the image clock corresponding to a distance from BD signal detector to the write start position of the latent image during image formation on the second surface, to a number of pulses different from a first number of pulses of the image clock corresponding to a distance from the horizontal synchronization signal detecting device to the write start position of the latent image during image formation on the first surface, based on the first number of pulses of the image clock during image formation on the first surface, in accordance with an expansion/contraction ratio of the transfer material after fixing of the image on the first surface.

10. 发明专利

JP2008092340A Apparatus and method for generating multiplied pulse, image forming device, and image reader 有权
标题翻译：用于产生多重脉冲，图像形成装置和图像读取器的装置和方法
公开(公告)号：JP2008092340A
公开(公告)日：2008-04-17
申请号：JP2006271791
申请日：2006-10-03
申请人： Brother Ind Ltd , ブラザー工業株式会社
发明人： AKIYAMA SHIGEKI
IPC分类号： H03K5/00 , B41J2/01 , H03B19/14 , H04N1/028
CPC分类号： H04N1/053 , H04N1/12 , H04N1/128 , H04N1/1911 , H04N2201/02443 , H04N2201/0471 , H04N2201/04727 , H04N2201/04734 , H04N2201/04775 , H04N2201/04798
摘要： PROBLEM TO BE SOLVED: To generate highly reliable multiplied pulse in which discontinuity of a multiplied pulse cycle before and after detecting a fixed amount of driving is suppressed, when generating and outputting the multiplied pulse each time the fixed amount of driving of an object to be driven is detected. SOLUTION: Each time an encoder edge is detected, R multiplied pulses are generated. When the encoder edge is detected, on the basis of (m) real cycles in the past including a real cycle between previous encoder edges, a time interval (prediction cycle Te) until next detecting the encoder edge is predicted. On the basis of the prediction cycle Te and a multiplication cycle t pR of the final multiplied pulse between the previous encoder terms, each of the multiplied pulses is then generated so as to linearly change the multiplication cycle from the multiplication cycle t pR to the multiplication cycle of the final multiplied pulse. Thus, the multiplied pulse can be obtained which is smoothly changed by suppressing discontinuity before and after edge detection. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了产生高度可靠的倍增脉冲，其中抑制了检测固定量的驱动之前和之后的相乘脉冲周期的不连续性，当每次固定的驱动量产生和输出相乘的脉冲时检测到被驱动物体。
解决方案：每次检测到编码器边沿时，都会产生R倍增脉冲。当检测到编码器边缘时，基于包括先前编码器边缘之间的实际周期的（m）实际周期，预测到下一次检测编码器边缘的时间间隔（预测周期Te）。基于先前编码器项之间的最后相乘脉冲的预测周期Te和乘法周期t SB SBR，然后生成每个相乘的脉冲，以便将乘法周期从乘法周期t pR 到最终相乘脉冲的乘法周期。因此，通过抑制边缘检测之前和之后的不连续性，可以获得平滑地改变的倍增脉冲。版权所有（C）2008，JPO＆INPIT

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