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公开(公告)号：US08466991B2
公开(公告)日：2013-06-18
申请号：US12838705
申请日：2010-07-19
申请人： Yaowu Mo , Chen Xu , Yandong Chen
发明人： Yaowu Mo , Chen Xu , Yandong Chen
摘要： This is generally directed to systems and methods for reading optical black pixel cells. For example, in some embodiments, the columns of a pixel array can be shunted together during an optical black pixel readout phase of the imaging system. This may, for example, help improve correction of column fixed pattern noise or other noise. In some embodiments, the column may be shunted together during the optical black pixel readout phase of the imaging system and not shunted during other phases of the imaging system (e.g., when reading values from active pixel cells, barrier pixel cells, etc). In some embodiments, circuitry for providing the column shunting can be implemented as an independent block of the imaging system. In other embodiments, this circuitry can be implemented within other blocks of the imaging system. As an illustration, the shunting circuitry can be implemented within a VLN block of the imaging system.
摘要翻译： 这通常涉及用于读取光学黑色像素单元的系统和方法。 例如，在一些实施例中，像素阵列的列可以在成像系统的光学黑色像素读出阶段期间被分流在一起。 这可以例如有助于改进列固定模式噪声或其他噪声的校正。 在一些实施例中，在成像系统的光学黑色像素读出阶段期间，列可以被分流在一起，并且在成像系统的其它阶段（例如当从有源像素单元，障碍像素单元等读取值时）不被分流。 在一些实施例中，用于提供列分流的电路可以被实现为成像系统的独立块。 在其他实施例中，该电路可以在成像系统的其他块内实现。 作为说明，分流电路可以在成像系统的VLN块内实现。
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公开(公告)号：US20120013780A1
公开(公告)日：2012-01-19
申请号：US12838705
申请日：2010-07-19
申请人： Yaowu Mo , Chen Xu , Yandong Chen
发明人： Yaowu Mo , Chen Xu , Yandong Chen
IPC分类号： H04N5/335
摘要： This is generally directed to systems and methods for reading optical black pixel cells. For example, in some embodiments, the columns of a pixel array can be shunted together during an optical black pixel readout phase of the imaging system. This may, for example, help improve correction of column fixed pattern noise or other noise. In some embodiments, the column may be shunted together during the optical black pixel readout phase of the imaging system and not shunted during other phases of the imaging system (e.g., when reading values from active pixel cells, barrier pixel cells, etc). In some embodiments, circuitry for providing the column shunting can be implemented as an independent block of the imaging system. In other embodiments, this circuitry can be implemented within other blocks of the imaging system. As an illustration, the shunting circuitry can be implemented within a VLN block of the imaging system.
摘要翻译： 这通常涉及用于读取光学黑色像素单元的系统和方法。 例如，在一些实施例中，像素阵列的列可以在成像系统的光学黑色像素读出阶段期间被分流在一起。 这可以例如有助于改进列固定模式噪声或其他噪声的校正。 在一些实施例中，在成像系统的光学黑色像素读出阶段期间，列可以被分流在一起，并且在成像系统的其它阶段（例如当从有源像素单元，障碍像素单元等读取值时）不被分流。 在一些实施例中，用于提供列分流的电路可以被实现为成像系统的独立块。 在其他实施例中，该电路可以在成像系统的其他块内实现。 作为说明，分流电路可以在成像系统的VLN块内实现。
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公开(公告)号：US08405747B2
公开(公告)日：2013-03-26
申请号：US13029905
申请日：2011-02-17
CPC分类号： H04N5/361 , H04N5/3658 , H04N5/378
摘要： A CMOS image sensor includes an image pixel array, a dark pixel array, data bit liens, reference bit lines, a driver, comparators, and analog-to-digital converter (“ADC”) circuits. The image pixel array generates analog image signals in response to incident light. The dark pixel array generates analog black reference signals for analog black level calibration of the analog image signals. In one embodiment, the data bit lines each coupled to a different column of image pixels of the image pixel array and the reference bit lines each coupled to a different column of black reference pixels within the dark pixel array. The driver is coupled to the reference bit lines to drive an analog black reference signal. The comparators each couple to one of the data bit lines and each coupled to an output of the driver and offset the analog image signals with the analog black reference signals in an analog domain. The ADC circuits each coupled to an output of a comparator.
摘要翻译： CMOS图像传感器包括图像像素阵列，暗像素阵列，数据位留置，参考位线，驱动器，比较器和模数转换器（ADC）电路。 图像像素阵列响应于入射光产生模拟图像信号。 暗像素阵列产生用于模拟图像信号的模拟黑电平校准的模拟黑参考信号。 在一个实施例中，每个耦合到图像像素阵列的不同列的图像像素的数据位线和每个耦合到暗像素阵列内的不同列的黑色参考像素的参考位线。 驱动器耦合到参考位线以驱动模拟黑色参考信号。 比较器每个耦合到数据位线中的一个，并且每个耦合到驱动器的输出，并且以模拟域中的模拟黑色参考信号偏移模拟图像信号。 ADC电路各自耦合到比较器的输出端。
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公开(公告)号：US08390712B2
公开(公告)日：2013-03-05
申请号：US12963525
申请日：2010-12-08
CPC分类号： H04N5/3745 , H01L27/14609
摘要： An imaging system may include an image sensor array formed from imaging pixels with feedback loops. Each imaging pixel may include an amplifier transistor that is controlled by a voltage on a floating diffusion node and may include a feedback transistor connected between the floating diffusion node and column readout circuitry. The amplifier transistor, together with a current source in the image sensor array, may form a common-source amplifier that inversely amplifies the voltage on the floating diffusion node and provides control signals to the feedback transistor. The common-source amplifier and the feedback transistor may create a feedback loop during image readout operations and during image reset operations that clamps the voltage on the floating diffusion node.
摘要翻译： 成像系统可以包括由具有反馈回路的成像像素形成的图像传感器阵列。 每个成像像素可以包括由浮动扩散节点上的电压控制的放大器晶体管，并且可以包括连接在浮动扩散节点和列读出电路之间的反馈晶体管。 放大器晶体管与图像传感器阵列中的电流源一起可以形成公共源放大器，其反向放大浮动扩散节点上的电压并向反馈晶体管提供控制信号。 共源放大器和反馈晶体管可以在图像读出操作期间和在将浮动扩散节点上的电压钳位的图像复位操作期间产生反馈回路。
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公开(公告)号：US20120212657A1
公开(公告)日：2012-08-23
申请号：US13029905
申请日：2011-02-17
IPC分类号： H04N5/335
CPC分类号： H04N5/361 , H04N5/3658 , H04N5/378
摘要： A CMOS image sensor includes an image pixel array, a dark pixel array, data bit liens, reference bit lines, a driver, comparators, and analog-to-digital converter (“ADC”) circuits. The image pixel array generates analog image signals in response to incident light. The dark pixel array generates analog black reference signals for analog black level calibration of the analog image signals. In one embodiment, the data bit lines each coupled to a different column of image pixels of the image pixel array and the reference bit lines each coupled to a different column of black reference pixels within the dark pixel array. The driver is coupled to the reference bit lines to drive an analog black reference signal. The comparators each couple to one of the data bit lines and each coupled to an output of the driver and offset the analog image signals with the analog black reference signals in an analog domain. The ADC circuits each coupled to an output of a comparator.
摘要翻译： CMOS图像传感器包括图像像素阵列，暗像素阵列，数据位留置，参考位线，驱动器，比较器和模数转换器（“ADC”）电路。 图像像素阵列响应于入射光产生模拟图像信号。 暗像素阵列产生用于模拟图像信号的模拟黑电平校准的模拟黑参考信号。 在一个实施例中，每个耦合到图像像素阵列的不同列的图像像素的数据位线和每个耦合到暗像素阵列内的不同列的黑色参考像素的参考位线。 驱动器耦合到参考位线以驱动模拟黑色参考信号。 比较器每个耦合到数据位线中的一个，并且每个耦合到驱动器的输出，并且以模拟域中的模拟黑色参考信号偏移模拟图像信号。 ADC电路各自耦合到比较器的输出端。
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6.发明授权Method and apparatus providing analog row noise correction and hot pixel filtering 有权提供模拟行噪声校正和热像素滤波的方法和装置公开(公告)号：US08077227B2
公开(公告)日：2011-12-13
申请号：US12114354
申请日：2008-05-02
CPC分类号： H04N5/37457 , H04N5/3559 , H04N5/361 , H04N5/367
摘要： An imaging device and method for operating the device. The imaging device comprises a pixel array that comprises a plurality of imaging pixels and dark reference pixels arranged in columns and rows. The dark reference pixels produce a noise signal that is subtracted from a pixel signal produced by the imaging pixels to correct row noise. In addition, the imaging device may comprise a hot pixel filtering circuit that blocks the output from hot pixels.
摘要翻译： 一种用于操作该装置的成像装置和方法。 成像装置包括像素阵列，其包括以列和行排列的多个成像像素和暗参考像素。 暗参考像素产生从由成像像素产生的像素信号中减去的噪声信号，以校正行噪声。 此外，成像装置可以包括阻止热像素的输出的热像素滤波电路。
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7.发明申请Methods and apparatuses for double sided dark reference pixel row-wise dark level non-uniformity compensation in image signals 有权图像信号中双面暗参考像素行方向暗电平不均匀补偿的方法和装置公开(公告)号：US20090160979A1
公开(公告)日：2009-06-25
申请号：US12004035
申请日：2007-12-20
IPC分类号： H04N9/64
摘要： Methods and apparatuses for row-wise dark level non-uniformity compensation of imaging sensor pixel signals. A column dependent dark reference value is determined as one of a linear and parabolic function of signal values from two areas of dark reference pixels and a column location and then used for dark level non-uniformity compensation of signal values from imaging pixels.
摘要翻译： 成像传感器像素信号的逐行暗电平不均匀补偿的方法和装置。 列依赖暗参考值被确定为来自暗参考像素和列位置的两个区域的信号值的线性和抛物线函数之一，然后用于来自成像像素的信号值的暗电平非均匀性补偿。
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8.发明授权Reducing noise in image sensors by concurrently reading reset and image signal levels from active and reference pixels 有权通过同时从有源和参考像素读取复位和图像信号电平，从而降低图像传感器中的噪声公开(公告)号：US08643750B2
公开(公告)日：2014-02-04
申请号：US12930015
申请日：2010-12-22
CPC分类号： H04N5/3575 , H04N5/2176 , H04N5/365
摘要： A method of one aspect includes reading a reset level of an active pixel, and concurrently, reading a reset level of a reference pixel. The method also includes reading an image signal level of the active pixel, and concurrently, reading an image signal level of the reference pixel. A reduced noise image signal level of the active pixel is generated based on the reset levels and the image signal levels of the active and reference pixels. Other methods are disclosed as well as apparatus and systems.
摘要翻译： 一个方面的方法包括读取有源像素的复位电平，同时读取参考像素的复位电平。 该方法还包括读取有源像素的图像信号电平，同时读取参考像素的图像信号电平。 基于有效和参考像素的复位电平和图像信号电平，生成有源像素的降低噪声图像信号电平。 公开了其它方法以及装置和系统。
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9.发明申请MULTIPLE-ROW CONCURRENT READOUT SCHEME FOR HIGH-SPEED CMOS IMAGE SENSOR WITH BACKSIDE ILLUMINATION 有权具有背光照明功能的高速CMOS图像传感器的多路并流读出方案公开(公告)号：US20130087683A1
公开(公告)日：2013-04-11
申请号：US13365746
申请日：2012-02-03
IPC分类号： H01L27/148 , H01L27/146
CPC分类号： H04N5/347 , H04N5/3532 , H04N5/355 , H04N5/3745 , H04N5/378
摘要： A system, method and apparatus implementing a multiple-row concurrent readout scheme for high-speed CMOS image sensor with backside illumination are described herein. In one embodiment, the method of operating an image sensor starts acquiring image data within a color pixel array and the image data from a first set of multiple rows in the color pixel array is then concurrently readout. Concurrently reading out the image data from the first set of multiple rows includes concurrently selecting a first portion of the image data from the first set by first readout circuitry and a second portion of the image data from the first set by second readout circuitry. The first and second portions of the image data from the first set are different and the first and second readout circuitries are also different. Other embodiments are also described.
摘要翻译： 这里描述了实现具有背面照明的高速CMOS图像传感器的多行并行读出方案的系统，方法和装置。 在一个实施例中，操作图像传感器的方法开始获取彩色像素阵列内的图像数据，然后同时读出来自彩色像素阵列中的第一组多行的图像数据。 同时从第一组多行读出图像数据包括由第一读出电路同时从第一组中选择图像数据的第一部分，以及通过第二读出电路从第一组中选择图像数据的第二部分。 来自第一组的图像数据的第一和第二部分是不同的，并且第一和第二读出电路也不同。 还描述了其它实施例。
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公开(公告)号：US20090190005A1
公开(公告)日：2009-07-30
申请号：US12010538
申请日：2008-01-25
CPC分类号： H04N5/363 , H04N5/3575 , H04N5/361 , H04N5/374
摘要： Methods and apparatuses providing pixel-wise noise correction using pixels to provide reference values during pixel readout operations.
摘要翻译： 使用像素提供像素级噪声校正以在像素读出操作期间提供参考值的方法和装置。
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