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公开(公告)号：US20190082125A1
公开(公告)日：2019-03-14
申请号：US16140862
申请日：2018-09-25
Applicant: Rambus Inc.
Inventor： Craig M. Smith , Frank Armstrong , Jay Endsley , Thomas Vogelsang , James E. Harris , John Ladd , Michael Guidash
Abstract: A pixel array within an integrated-circuit image sensor is exposed to light representative of a scene during a first frame interval and then oversampled a first number of times within the first frame interval to generate a corresponding first number of frames of image data from which a first output image may be constructed. One or more of the first number of frames of image data are evaluated to determine whether a range of luminances in the scene warrants adjustment of an oversampling factor from the first number to a second number, if so, the oversampling factor is adjusted such that the pixel array is oversampled the second number of times within a second frame interval to generate a corresponding second number of frames of image data from which a second output image may be constructed.
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公开(公告)号：US10154220B2
公开(公告)日：2018-12-11
申请号：US15563875
申请日：2016-03-31
Applicant: Rambus Inc.
Inventor： Thomas Vogelsang , Jay Endsley , Michael Guidash , Craig M. Smith
Abstract: Multiple image data subframes corresponding to respective portions of an exposure interval are generated within a sensor device of an image system. Depending on whether the exposure interval exceeds one or more exposure time thresholds, data representative multiple image data subframes are output from the image sensor device in one of at least two formats, including a first format in which each of the subframes of image data is output in its entirety, and a second format in which a logical combination of at least two of the subframes of image data is output instead of the at least two of the subframes of image data such that the total volume of image data output from the image sensor device is reduced relative to the first format.
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公开(公告)号：US10070084B2
公开(公告)日：2018-09-04
申请号：US14989580
申请日：2016-01-06
Applicant: Rambus Inc.
Inventor： Michael Guidash , Jay Endsley , John Ladd , Thomas Vogelsang , Craig M. Smith
Abstract: A pixel within a pixel array of an integrated-circuit image sensor outputs an analog signal representative of accumulated photocharge. First and second analog-to-digital conversions of the analog signal are initiated while the pixel is outputting the analog signal, the first analog-to-digital conversion corresponding to a low-light range of photocharge accumulation within the pixel and the second analog-to-digital conversion corresponding to a brighter-light range of photocharge accumulation within the pixel.
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公开(公告)号：US09883130B2
公开(公告)日：2018-01-30
申请号：US15059229
申请日：2016-03-02
Applicant: Rambus Inc.
Inventor： Michael Guidash
CPC classification number: H04N5/378 , H04N5/23245 , H04N5/347 , H04N5/3745 , H04N5/3765
Abstract: In an integrated-circuit image sensor having a pixel array, first and second control pulses that enable photocharge transfer from respective first and second photosensitive elements to a shared floating diffusion node are staggered in time such that capacitive feedthrough to the shared floating diffusion node from a trailing edge of the first control pulse is counteracted by capacitive feedthrough to the shared floating diffusion node from a leading edge of the second control pulse.
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公开(公告)号：US20170310910A1
公开(公告)日：2017-10-26
申请号：US15589149
申请日：2017-05-08
Applicant: Rambus Inc.
Inventor： Craig M. Smith , Michael Guidash , Jay Endsley , Thomas Vogelsang , James E. Harris
IPC: H04N5/355 , H04N5/3745 , H04N5/347 , H01L27/146 , H04N5/378 , H04N5/374
CPC classification number: H04N5/3559 , H01L27/14621 , H01L27/14627 , H01L27/14641 , H01L27/14643 , H01L27/14645 , H04N5/347 , H04N5/355 , H04N5/3741 , H04N5/37455 , H04N5/378
Abstract: In a pixel array within an integrated-circuit image sensor, each of a plurality of pixels is evaluated to determine whether charge integrated within the pixel in response to incident light exceeds a first threshold. N-bit digital samples corresponding to the charge integrated within at least a subset of the plurality of pixels are generated, and then applied to a lookup table to retrieve respective M-bit digital values (M being less than N), wherein a stepwise range of charge integration levels represented by possible states of the M-bit digital values extends upward from a starting charge integration level that is determined based on the first threshold.
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Patent Agency Ranking
公开(公告)号：US09521349B2
公开(公告)日：2016-12-13
申请号：US14727869
申请日：2015-06-02
Applicant: Rambus Inc.
Inventor： Thomas Vogelsang , Jay Endsley , Michael Guidash
CPC classification number: H04N5/378 , H04N5/3454 , H04N5/3698 , H04N5/376
Abstract: Pixels within an image sensor pixel array are sampled by corresponding conditional read circuitry. A zero pixel value is outputted for each pixel associated with a sample less than a conversion threshold, and a saturated pixel value is outputted for each pixel associated with a sample greater than or equal to a saturation threshold. Samples greater than or equal to the conversion threshold and less than the saturation threshold are converted by an ADC, and a converted pixel value is output for each associated above threshold pixel. The ADC (along with any corresponding amplifiers) are powered on for a variable period depending on the number of pixels needing conversion during the conversion of such samples during a read period, and are powered off for the remainder of the read period.
Abstract translation: 图像传感器像素阵列内的像素通过相应的条件读取电路进行采样。 对于与小于转换阈值的样本相关联的每个像素输出零像素值，并且对于与大于或等于饱和阈值的样本相关联的每个像素输出饱和像素值。 通过ADC转换大于或等于转换阈值且小于饱和阈值的样本，并为每个相关联的上述阈值像素输出转换的像素值。 取决于在读取周期期间这样的样本的转换期间需要转换的像素的数量，ADC（以及任何相应的放大器）以及可变周期被加电，并且在读取周期的其余部分中断电。
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公开(公告)号：US20150373290A1
公开(公告)日：2015-12-24
申请号：US14727869
申请日：2015-06-02
Applicant: Rambus Inc.
Inventor： Thomas Vogelsang , Jay Endsley , Michael Guidash
CPC classification number: H04N5/378 , H04N5/3454 , H04N5/3698 , H04N5/376
Abstract: Pixels within an image sensor pixel array are sampled by corresponding conditional read circuitry. A zero pixel value is outputted for each pixel associated with a sample less than a conversion threshold, and a saturated pixel value is outputted for each pixel associated with a sample greater than or equal to a saturation threshold. Samples greater than or equal to the conversion threshold and less than the saturation threshold are converted by an ADC, and a converted pixel value is output for each associated above threshold pixel. The ADC (along with any corresponding amplifiers) are powered on for a variable period depending on the number of pixels needing conversion during the conversion of such samples during a read period, and are powered off for the remainder of the read period.
Abstract translation: 图像传感器像素阵列内的像素通过相应的条件读取电路进行采样。 对于与小于转换阈值的样本相关联的每个像素输出零像素值，并且对于与大于或等于饱和阈值的样本相关联的每个像素输出饱和像素值。 通过ADC转换大于或等于转换阈值且小于饱和阈值的样本，并为每个相关联的上述阈值像素输出转换的像素值。 取决于在读取周期期间这样的样本的转换期间需要转换的像素的数量，ADC（以及任何相应的放大器）以及可变周期被加电，并且在读取周期的其余部分中断电。
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公开(公告)号：US20150070544A1
公开(公告)日：2015-03-12
申请号：US14482065
申请日：2014-09-10
Applicant: Rambus Inc.
Inventor： Craig M. Smith , Michael Guidash , Jay Endsley , Thomas Vogelsang , James E. Harris
IPC: H04N5/378
CPC classification number: H04N5/3559 , H01L27/14621 , H01L27/14627 , H01L27/14641 , H01L27/14643 , H01L27/14645 , H04N5/347 , H04N5/355 , H04N5/3741 , H04N5/37455 , H04N5/378
Abstract: In a pixel array within an integrated-circuit image sensor, each of a plurality of pixels is evaluated to determine whether charge integrated within the pixel in response to incident light exceeds a first threshold. N-bit digital samples corresponding to the charge integrated within at least a subset of the plurality of pixels are generated, and then applied to a lookup table to retrieve respective M-bit digital values (M being less than N), wherein a stepwise range of charge integration levels represented by possible states of the M-bit digital values extends upward from a starting charge integration level that is determined based on the first threshold.
Abstract translation: 在集成电路图像传感器内的像素阵列中，评估多个像素中的每一个以确定响应于入射光在像素内积分的电荷是否超过第一阈值。 产生与集成在多个像素的至少一个子集中的电荷相对应的N位数字样本，然后将其应用于查找表以检索相应的M位数字值（M小于N），其中步长范围 由M位数字值的可能状态表示的电荷积分电平从基于第一阈值确定的起始电荷积分电平向上延伸。
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公开(公告)号：US11284034B2
公开(公告)日：2022-03-22
申请号：US16859243
申请日：2020-04-27
Applicant: Rambus Inc.
Inventor： Jay Endsley , Thomas Vogelsang , Craig M. Smith , Michael Guidash , Alexander C. Schneider
Abstract: Signals representative of total photocharge integrated within respective image-sensor pixels are read out of the pixels after a first exposure interval that constitutes a first fraction of a frame interval. Signals in excess of a threshold level are read out of the pixels after an ensuing second exposure interval that constitutes a second fraction of the frame interval, leaving residual photocharge within the pixels. After a third exposure interval that constitutes a third fraction of the frame interval, signals representative of a combination of at least the residual photocharge and photocharge integrated within the pixels during the third exposure interval are read out of the pixels.
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公开(公告)号：US10798322B2
公开(公告)日：2020-10-06
申请号：US16140862
申请日：2018-09-25
Applicant: Rambus Inc.
Inventor： Craig M. Smith , Frank Armstrong , Jay Endsley , Thomas Vogelsang , James E. Harris , John Ladd , Michael Guidash
Abstract: A pixel array within an integrated-circuit image sensor is exposed to light representative of a scene during a first frame interval and then oversampled a first number of times within the first frame interval to generate a corresponding first number of frames of image data from which a first output image may be constructed. One or more of the first number of frames of image data are evaluated to determine whether a range of luminances in the scene warrants adjustment of an oversampling factor from the first number to a second number, if so, the oversampling factor is adjusted such that the pixel array is oversampled the second number of times within a second frame interval to generate a corresponding second number of frames of image data from which a second output image may be constructed.
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