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公开(公告)号：US09521351B1
公开(公告)日：2016-12-13
申请号：US14995138
申请日：2016-01-13
Applicant: Rambus Inc.
Inventor： Jay Endsley , Thomas Vogelsang , Craig M. Smith , Michael Guidash , Alexander C. Schneider
CPC classification number: H04N5/378 , H04N5/2355 , H04N5/3532 , H04N5/35536
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.
Abstract translation: 在构成帧间隔的第一分数的第一曝光间隔之后，从像素中读出代表在相应图像传感器像素内的总光电荷的代表信号。 在构成帧间隔的第二部分的随后的第二曝光间隔之后，从像素中读出超过阈值电平的信号，在像素内留下残余光电荷。 在构成帧间隔的第三分数的第三曝光间隔之后，从像素中读出表示在第三曝光间隔期间集成在像素内的至少残留光电荷和光电荷的组合的信号。
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公开(公告)号：US09491391B2
公开(公告)日：2016-11-08
申请号：US14638161
申请日：2015-03-04
Applicant: Rambus Inc.
Inventor： Craig M. Smith , Michael Guidash , Jay Endsley , Thomas Vogelsang , James E. Harris
IPC: H04N3/14 , H04N5/335 , H04N5/378 , H04N5/347 , H04N5/355 , H04N5/3745 , H01L31/062 , H01L31/113 , H01L27/146
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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公开(公告)号：US20160323524A1
公开(公告)日：2016-11-03
申请号：US15100976
申请日：2014-12-03
Applicant: RAMBUS INC.
Inventor： Craig M. Smith , Frank Armstrong , Jay Endsley , Thomas Vogelsang , James E. Harris , John Ladd , Michael Guidash
CPC classification number: H04N5/355 , H04N5/23245 , H04N5/2355 , H04N5/347 , H04N5/35536 , H04N5/361 , H04N5/37457 , H04N9/045
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.
Abstract translation: 集成电路图像传感器内的像素阵列在第一帧间隔期间暴露于表示场景的光，然后在第一帧间隔内对第一次数进行过采样，以生成对应的第一数量的图像数据帧， 可以构造第一输出图像。 对图像数据的第一数量帧中的一个或多个进行评估，以确定场景中的亮度范围是否需要将过采样因子从第一数量调整到第二数量，如果是，则调整过采样因子，使得 像素阵列在第二帧间隔内对第二次数进行过采样，以生成可以从其构造第二输出图像的图像数据的对应的第二数量帧。
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公开(公告)号：US09001251B2
公开(公告)日：2015-04-07
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: H04N3/14 , H04N5/335 , H04N5/378 , H01L31/062 , H01L31/113
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：US10652493B2
公开(公告)日：2020-05-12
申请号：US16197270
申请日：2018-11-20
Applicant: Rambus Inc.
Inventor： John Ladd , Michael Guidash , Craig M. Smith , Thomas Vogelsang , Jay Endsley , Michael T. Ching , James E. Harris
Abstract: A sequence of control voltage levels are applied to a control signal line capacitively coupled to a floating diffusion node of a pixel to sequentially adjust a voltage level of the floating diffusion node. A pixel output signal representative of the voltage level of the floating diffusion node is compared with a reference voltage to identify a first control voltage level of the sequence of control voltage levels for which the voltage level of the floating diffusion node exceeds the reference voltage.
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Patent Agency Ranking
公开(公告)号：US10356350B2
公开(公告)日：2019-07-16
申请号：US16051344
申请日：2018-07-31
Applicant: Rambus Inc.
Inventor： Michael Guidash , Jay Endsley , John Ladd , Thomas Vogelsang , Craig M. Smith
Abstract: Photocharge is accumulated within an image sensor pixel array during a first exposure interval. At conclusion of the first exposure interval, accumulated photocharge is discarded from a first subset of the pixels to emulate absence of incident light with respect to those pixels. After discarding accumulated photocharge from the first subset of the pixels, first and second readout signals are generated, the first readout signals corresponding to respective pixels not included in the first subset and indicative of photocharge accumulated therein, and the second readout signals corresponding to respective pixels included in the first subset.
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公开(公告)号：US20190045149A1
公开(公告)日：2019-02-07
申请号：US16051344
申请日：2018-07-31
Applicant: Rambus Inc.
Inventor： Michael Guidash , Jay Endsley , John Ladd , Thomas Vogelsang , Craig M. Smith
CPC classification number: H04N5/374 , H01L27/14643 , H04N5/35554 , H04N5/3577 , H04N5/365 , H04N5/3765 , H04N5/378
Abstract: Photocharge is accumulated within an image sensor pixel array during a first exposure interval. At conclusion of the first exposure interval, accumulated photocharge is discarded from a first subset of the pixels to emulate absence of incident light with respect to those pixels. After discarding accumulated photocharge from the first subset of the pixels, first and second readout signals are generated, the first readout signals corresponding to respective pixels not included in the first subset and indicative of photocharge accumulated therein, and the second readout signals corresponding to respective pixels included in the first subset.
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公开(公告)号：US10165209B2
公开(公告)日：2018-12-25
申请号：US15328207
申请日：2015-07-23
Applicant: Rambus Inc.
Inventor： John Ladd , Michael Guidash , Craig M. Smith , Thomas Vogelsang , Jay Endsley , Michael T. Ching , James E. Harris
Abstract: A sequence of control voltage levels are applied to a control signal line capacitively coupled to a floating diffusion node of a pixel to sequentially adjust a voltage level of the floating diffusion node. A pixel output signal representative of the voltage level of the floating diffusion node is compared with a reference voltage to identify a first control voltage level of the sequence of control voltage levels for which the voltage level of the floating diffusion node exceeds the reference voltage.
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公开(公告)号：US10136090B2
公开(公告)日：2018-11-20
申请号：US14772311
申请日：2014-03-14
Applicant: Rambus Inc.
Inventor： Thomas Vogelsang , Michael Guidash , Song Xue , Maxim Smirnov , Craig M. Smith , Jay Endsley , James E. Harris
IPC: H04N5/225 , H04N5/3745 , H01L27/146 , H04N5/347 , H04N5/376
Abstract: An image sensor architecture with multi-bit sampling is implemented within an image sensor system. A pixel signal produced in response to light incident upon a photosensitive element is converted to a multiple-bit digital value representative of the pixel signal. If the pixel signal exceeds a sampling threshold, the photosensitive element is reset. During an image capture period, digital values associated with pixel signals that exceed a sampling threshold are accumulated into image data.
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公开(公告)号：US10104318B2
公开(公告)日：2018-10-16
申请号：US15100976
申请日：2014-12-03
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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