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    • 5. 发明申请
    • Analog front-end circuit and electronic apparatus
    • 模拟前端电路和电子设备
    • US20060176525A1
    • 2006-08-10
    • US11347686
    • 2006-02-03
    • Masahiko MizutaKenji Kimura
    • Masahiko MizutaKenji Kimura
    • H04N1/04
    • H04N1/0473H04N1/1013H04N1/192H04N2201/0477H04N2201/04774
    • An analog front-end circuit that controls an imaging device and processes an analog image signal output from the imaging device comprises: an analog processor that receives an analog image signal from the imaging device, provides the image signal with predetermined processing, and outputs a resultant signal; an A/D converter that performs A/D conversion with the image signal output from the analog processor; a holding circuit that holds digital image data output from the A/D converter; a timing generator that, based on a first reference clock, generates a plurality of clocks and outputs the clocks to at least one of the analog processor and the A/D converter; and a spread spectrum modulation circuit that performs spread spectrum modulation with the first reference clock and outputs a resultant clock that has been subject to the spread spectrum modulation as a modulated clock to the holding circuit; wherein the holding circuit holds the digital image data from the A/D converter based on the modulated clock output from the spread spectrum modulation circuit.
    • 控制成像装置并处理从成像装置输出的模拟图像信号的模拟前端电路包括:模拟处理器,其从成像装置接收模拟图像信号,以预定的处理提供图像信号,并输出结果 信号; A / D转换器,利用从模拟处理器输出的图像信号进行A / D转换; 保持电路,其保持从A / D转换器输出的数字图像数据; 定时发生器,其基于第一参考时钟产生多个时钟,并且将所述时钟输出到所述模拟处理器和所述A / D转换器中的至少一个; 以及扩频调制电路,其利用所述第一参考时钟进行扩频调制,并将经过所述扩频调制的合成时钟作为调制时钟输出到所述保持电路; 其中保持电路基于从扩展频谱调制电路输出的调制时钟保持来自A / D转换器的数字图像数据。
    • 6. 发明授权
    • Optical writer, image forming apparatus, and method of controlling optical writer
    • 光学写入器,图像形成装置和控制光学写入器的方法
    • US08395648B2
    • 2013-03-12
    • US13046893
    • 2011-03-14
    • Tatsuya MiyaderaMasayuki HayashiYoshinori Shirasaki
    • Tatsuya MiyaderaMasayuki HayashiYoshinori Shirasaki
    • B41J2/435B41J2/47
    • B41J2/473G02B26/123G02B26/127G03G15/043G06K15/1219H04N1/113H04N2201/0477
    • An optical writer includes a scanning part causing a light beam from a light source to perform scanning on a photosensitive body; an image information obtaining part obtaining image information of an image; a dithering information obtaining part obtaining dithering information of the image; a pixel clock generating part generating a pixel clock signal; and a light emission control part to control the light source based on the image information in accordance with the pixel clock signal. The pixel clock generating part modulates the clock frequency of the pixel clock signal in accordance with phase shift information for correcting a change in the speed of the scanning on main scanning lines on the photosensitive body, and determines the timing of modulating the clock frequency based on the dithering information on a main scanning line basis so that the timing of modulating the clock frequency differs between the main scanning lines.
    • 光学写入器包括使来自光源的光束在感光体上进行扫描的扫描部分; 获取图像的图像信息的图像信息获取部分; 抖动信息获取部分获得图像的抖动信息; 产生像素时钟信号的像素时钟产生部分; 以及发光控制部,其根据像素时钟信号基于图像信息来控制光源。 像素时钟生成部根据用于校正感光体上的主扫描线上的扫描速度的变化的相移信息来调制像素时钟信号的时钟频率,并且基于 在主扫描线基础上的抖动信息,使得调制时钟频率的定时在主扫描线之间不同。
    • 10. 发明申请
    • SCANNING OPTICAL DEVICE, IMAGE FORMING DEVICE AND JITTER CORRECTION METHOD
    • 扫描光学装置,图像形成装置和抖动校正方法
    • US20080285095A1
    • 2008-11-20
    • US12117327
    • 2008-05-08
    • Kazuyuki Iwamoto
    • Kazuyuki Iwamoto
    • H04N1/04
    • B41J2/471G02B26/123G06K15/1219H04N1/053H04N1/1135H04N2201/0477
    • A scanning optical device includes a rotating polygonal mirror having a plurality of reflecting faces. A first light source emits a first light beam from one section obtained by sectioning the scanning optical device with a plane passing through the rotation axis of the rotating polygonal mirror. A second light source emits a second light beam from the other section. The first calculation unit calculates scan time of the first light source. The second calculation unit calculates scan time of the second light source. The jitter correction unit corrects jitter by controlling a pixel clock supplied to the first light source according to the scan time of the second light source. The jitter correction unit also corrects jitter by controlling a pixel clock supplied to the second light source according to the scan time of the first light source.
    • 扫描光学装置包括具有多个反射面的旋转多面镜。 第一光源从通过旋转多面镜的旋转轴的平面对扫描光学装置进行切片而获得的一个部分发射第一光束。 第二光源从另一部分发射第二光束。 第一计算单元计算第一光源的扫描时间。 第二计算单元计算第二光源的扫描时间。 抖动校正单元通过根据第二光源的扫描时间控制提供给第一光源的像素时钟来校正抖动。 抖动校正单元还通过根据第一光源的扫描时间控制提供给第二光源的像素时钟来校正抖动。