公开(公告)号：US20080106748A1

公开(公告)日：2008-05-08

申请号：US11932168

申请日：2007-10-31

申请人： Hajime TSUKAHARA ,  Tohru Kanno

发明人： Hajime TSUKAHARA ,  Tohru Kanno

IPC分类号： H04N1/40 ,  G06F3/12

CPC分类号： H04N1/40056

摘要： An image reading apparatus and an image forming apparatus including the image reading apparatus. The image reading apparatus includes a photoelectric converter to convert incident light into an analog image signal, a drive unit to drive the photoelectric converter by a frequency modulated clock signal, an overlapping circuit to overlap an anti-phase analog signal to the analog image signal fluctuating according to the frequency modulated clock signal with a same amount of fluctuation as that of the analog image signal, and an analog digital converter to convert the overlapped analog image signal into a digital output.

摘要翻译： 一种图像读取装置和包括图像读取装置的图像形成装置。 图像读取装置包括将入射光转换为模拟图像信号的光电转换器，通过调频时钟信号驱动光电变换器的驱动单元，将反相模拟信号与反相模拟信号重叠至模拟图像信号波动的重叠电路 根据与模拟图像信号相同量的波动的调频时钟信号，以及将重叠的模拟图像信号转换为数字输出的模拟数字转换器。

公开(公告)号：US20080024842A1

公开(公告)日：2008-01-31

申请号：US11776132

申请日：2007-07-11

申请人： Hajime Tsukahara ,  Tohru Kanno

发明人： Hajime Tsukahara ,  Tohru Kanno

IPC分类号： H04N1/46

CPC分类号： H04N1/00002 ,  H04N1/00013 ,  H04N1/00018 ,  H04N1/00031 ,  H04N1/00045 ,  H04N1/00063 ,  H04N1/00087 ,  H04N1/193

摘要： An image reading signal processing IC is disclosed which includes three circuits to which corresponding analog image signals of three primary colors of a document read by a CCD are input. In each of the three circuits, a test pattern generating circuit is disposed between an ADC and an LVDS processing circuit. Further, the image reading signal processing IC includes an operational mode determination information input unit formed of a TG & I/F and an OR gate. An operational mode of the test pattern generating circuit is switched between a normal mode for outputting digital image data output from the ADC and a test pattern output mode for outputting digital data of a test pattern generated by the test pattern generating circuit based on operational mode determination information input from the operational mode determination information input unit.

摘要翻译： 公开了一种图像读取信号处理IC，其包括三个电路，由CCD输入的文件的三原色对应的模拟图像信号被输入。 在三个电路中的每一个中，测试图形发生电路设置在ADC和LVDS处理电路之间。 此外，图像读取信号处理IC包括由TG＆I / F和OR门形成的操作模式确定信息输入单元。 测试图形生成电路的操作模式在用于输出从ADC输出的数字图像数据的正常模式和用于输出由测试图形生成电路基于操作模式确定产生的测试图案的数字数据的测试图案输出模式之间切换 从操作模式确定信息输入单元输入的信息。

公开(公告)号：US08395830B2

公开(公告)日：2013-03-12

申请号：US11776132

申请日：2007-07-11

申请人： Hajime Tsukahara ,  Tohru Kanno

发明人： Hajime Tsukahara ,  Tohru Kanno

IPC分类号： H04N1/46

CPC分类号： H04N1/00002 ,  H04N1/00013 ,  H04N1/00018 ,  H04N1/00031 ,  H04N1/00045 ,  H04N1/00063 ,  H04N1/00087 ,  H04N1/193

摘要： An image reading signal processing IC includes three circuits which independently process input analog image signals of three primary colors. Each circuit includes an ADC which converts amplified analog image signals into digital image data. Each circuit also includes an LVDS processing circuit which outputs the digital image data in a low voltage differential signaling level. Each circuit further includes a test pattern generating circuit connected between the ADC and the LVDS processing circuit for generating digital data of a test pattern. The image reading signal processing IC additionally includes an operational mode determination information input unit which inputs operational mode determination information to the test pattern generating circuit. Further, the image reading signal processing IC includes a switching unit which switches one of the digital data of the test patterns to any one or more of main scanning direction gradation pattern data and sub scanning direction gradation pattern data.

摘要翻译： 图像读取信号处理IC包括独立地处理三原色输入模拟图像信号的三个电路。 每个电路包括将放大的模拟图像信号转换成数字图像数据的ADC。 每个电路还包括一个LVDS处理电路，它以低电压差分信号电平输出数字图像数据。 每个电路还包括连接在ADC和LVDS处理电路之间以产生测试图案的数字数据的测试图形发生电路。 图像读取信号处理IC另外包括向测试图案生成电路输入操作模式确定信息的操作模式确定信息输入单元。 此外，图像读取信号处理IC包括将测试图案的数字数据中的一个切换到主扫描方向灰度图案数据和副扫描方向灰度图案数据中的一个或多个的切换单元。

公开(公告)号：US08395821B2

公开(公告)日：2013-03-12

申请号：US12624582

申请日：2009-11-24

申请人： Hajime Tsukahara ,  Tohru Kanno

发明人： Hajime Tsukahara ,  Tohru Kanno

IPC分类号： H04N1/407 ,  H04N1/40 ,  H04N1/04 ,  H04N5/228 ,  H04N9/73 ,  G06K1/00 ,  G06K9/00

CPC分类号： H04N1/4076 ,  H04N1/4072 ,  H04N2201/0081

摘要： When a light source is in off state, a gray level of image data on a pixel-by-pixel basis is generated as a first black level and an average of gray levels of a portion of the image data corresponding to optical black image portions of sensor chips is generated as a second black level. After that, when an image of an original is read, an average of gray levels of the black image data on a line-by-line basis is generated as a third black level. The first black level is subtracted from a gray level of the image data on a line-by-line basis (an offset correction), and a difference between the third black level and the second black level is added to a gray level of the image data after being subjected to the subtraction on a line-by-line basis.

摘要翻译： 当光源处于关闭状态时，以像素为单位的图像数据的灰度级被生成为第一黑色电平，并且对应于图像数据的一部分的光学黑色图像部分的灰度级的平均值 生成传感器芯片作为第二黑电平。 之后，当读取原稿的图像时，生成黑色图像数据在逐行基础上的灰度级的平均值作为第三黑色电平。 逐行地从图像数据的灰度级（偏移校正）中减去第一黑色电平，并且将第三黑电平和第二黑电平之间的差加到图像的灰度级 经过逐行减法后的数据。

公开(公告)号：US20100142009A1

公开(公告)日：2010-06-10

申请号：US12624582

申请日：2009-11-24

申请人： Hajime TSUKAHARA ,  Tohru Kanno

发明人： Hajime TSUKAHARA ,  Tohru Kanno

IPC分类号： H04N1/04

CPC分类号： H04N1/4076 ,  H04N1/4072 ,  H04N2201/0081

摘要： When a light source is in off state, a gray level of image data on a pixel-by-pixel basis is generated as a first black level and an average of gray levels of a portion of the image data corresponding to optical black image portions of sensor chips is generated as a second black level. After that, when an image of an original is read, an average of gray levels of the black image data on a line-by-line basis is generated as a third black level. The first black level is subtracted from a gray level of the image data on a line-by-line basis (an offset correction), and a difference between the third black level and the second black level is added to a gray level of the image data after being subjected to the subtraction on a line-by-line basis.

摘要翻译： 当光源处于关闭状态时，以像素为单位的图像数据的灰度级被生成为第一黑色电平，并且对应于图像数据的一部分的光学黑色图像部分的灰度级的平均值 生成传感器芯片作为第二黑电平。 之后，当读取原稿的图像时，生成黑色图像数据在逐行基础上的灰度级的平均值作为第三黑色电平。 逐行地从图像数据的灰度级（偏移校正）中减去第一黑色电平，并且将第三黑电平和第二黑电平之间的差加到图像的灰度级 经过逐行减法后的数据。

公开(公告)号：US07948661B2

公开(公告)日：2011-05-24

申请号：US11932168

申请日：2007-10-31

申请人： Hajime Tsukahara ,  Tohru Kanno

发明人： Hajime Tsukahara ,  Tohru Kanno

IPC分类号： H04N1/04 ,  H04N1/40

CPC分类号： H04N1/40056

摘要： An image reading apparatus and an image forming apparatus including the image reading apparatus. The image reading apparatus includes a photoelectric converter to convert incident light into an analog image signal, a drive unit to drive the photoelectric converter by a frequency modulated clock signal, an overlapping circuit to overlap an anti-phase analog signal to the analog image signal fluctuating according to the frequency modulated clock signal with a same amount of fluctuation as that of the analog image signal, and an analog digital converter to convert the overlapped analog image signal into a digital output.

摘要翻译： 一种图像读取装置和包括图像读取装置的图像形成装置。 图像读取装置包括将入射光转换为模拟图像信号的光电转换器，通过调频时钟信号驱动光电变换器的驱动单元，将反相模拟信号与反相模拟信号重叠至模拟图像信号波动的重叠电路 根据与模拟图像信号相同量的波动的调频时钟信号，以及将重叠的模拟图像信号转换为数字输出的模拟数字转换器。

公开(公告)号：US07782496B2

公开(公告)日：2010-08-24

申请号：US11723426

申请日：2007-03-20

申请人： Hajime Tsukahara ,  Tohru Kanno

发明人： Hajime Tsukahara ,  Tohru Kanno

IPC分类号： H04N1/04

CPC分类号： H04N1/40056 ,  H04N1/1013 ,  H04N1/193

摘要： An image signal processing circuit including a gain control circuit capable of performing gain control operation, and an image reading device or an image forming apparatus incorporating the image signal processing circuit.

摘要翻译： 包括能够执行增益控制操作的增益控制电路的图像信号处理电路以及并入有图像信号处理电路的图像读取装置或图像形成装置。

公开(公告)号：US20080212146A1

公开(公告)日：2008-09-04

申请号：US11723426

申请日：2007-03-20

申请人： Hajime Tsukahara ,  Tohru Kanno

发明人： Hajime Tsukahara ,  Tohru Kanno

IPC分类号： H04N1/40

CPC分类号： H04N1/40056 ,  H04N1/1013 ,  H04N1/193

摘要： An image signal processing circuit including a gain control circuit capable of performing gain control operation, and an image reading device or an image forming apparatus incorporating the image signal processing circuit.

摘要翻译： 包括能够执行增益控制操作的增益控制电路的图像信号处理电路以及并入有图像信号处理电路的图像读取装置或图像形成装置。

公开(公告)号：US20080068467A1

公开(公告)日：2008-03-20

申请号：US11851639

申请日：2007-09-07

申请人： Tohru Kanno ,  Hajime Tsukahara

发明人： Tohru Kanno ,  Hajime Tsukahara

IPC分类号： H04N5/228

CPC分类号： H04N1/401 ,  H04N1/486

摘要： A signal processing IC that receives analog signals each corresponding to one of three colors from a color linear image sensor includes two systems of input-signal processing for each color each including at least a sample-and-hold circuit, a multiplexer circuit, a variable gain amplifier, and an A/D converter circuit. The sample-and-hold circuit samples and holds an analog signal. The multiplexer circuit multiplexes analog signals of the two systems subjected to sampling and holding into a signal of one system. The variable gain amplifier amplifies the signal output from the multiplexer circuit. The A/D converter circuit converts the amplified signal to digital data.

摘要翻译： 从彩色线性图像传感器接收各自对应于三种颜色之一的模拟信号的信号处理IC包括两种系统的每种颜色的输入信号处理，每种颜色至少包括采样保持电路，多路复用器电路，变量 增益放大器和A / D转换电路。 采样和保持电路采样并保持模拟信号。 复用器电路将经过采样和保持的两个系统的模拟信号复用到一个系统的信号中。 可变增益放大器放大从多路复用器电路输出的信号。 A / D转换电路将放大的信号转换为数字数据。

公开(公告)号：US09781278B2

公开(公告)日：2017-10-03

申请号：US15411290

申请日：2017-01-20

申请人： Yuuya Miyoshi ,  Tohru Kanno

发明人： Yuuya Miyoshi ,  Tohru Kanno

IPC分类号： H04N1/04 ,  H04N1/00

CPC分类号： H04N1/00013 ,  H04N1/00907 ,  H04N1/0461 ,  H04N2201/0081 ,  H04N2201/0094

摘要： A solid-state imaging device includes a pixel circuit including a plurality of photoelectric conversion elements and configured to output a signal level and a reset level, an analog correlated double sampling (CDS) circuit connected to the pixel circuit and configured to perform correlated double sampling in an analog region based on the signal level and the reset level and output a result of the correlated double sampling, an analog-digital (AD) conversion circuit connected to the analog CDS circuit and configured to convert two different analog signals output from the analog CDS circuit into two digital signals, a signal processing circuit connected to the AD conversion circuit and configured to obtain a difference between the two different digital signals output from the AD conversion circuit; and a reference voltage generating circuit to output a first reference voltage that defines a clamp level of the analog CDS circuit.