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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：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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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：US10178329B2
公开(公告)日：2019-01-08
申请号：US15312778
申请日：2015-05-21
Applicant: Rambus Inc.
Inventor： Thomas Vogelsang , Craig M. Smith
IPC: H04N5/355 , H04N5/347 , H04N5/3745 , H04N5/378 , H04N9/04 , G06T7/246 , H04N5/232 , H04N5/235 , H04N5/343
Abstract: In an integrated-circuit image sensor having a pixel array, a first subframe readout policy is selected from among a plurality of subframe readout policies, each of the subframe readout policies specifying a first number of subframes of image data to be readout from the pixel array for each output image frame and respective exposure durations for each of the first number of subframes of image data, wherein a shortest one of the exposure durations is uniform for each of the subframe readout policies. Each of the first number of subframes of image data is read out from the pixel array following the respective exposure durations thereof while applying a respective analog readout gain. The analog readout gain applied during readout of at least a first subframe of the first number of subframes is scaled according to a ratio of the shortest one of the exposure durations to the exposure duration of the first subframe.
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Patent Agency Ranking
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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公开(公告)号：US09894304B1
公开(公告)日：2018-02-13
申请号：US14827838
申请日：2015-08-17
Applicant: Rambus Inc.
Inventor： Craig M. Smith , Michael Guidash , Thomas Vogelsang , Jay Endsley , Michael T. Ching
CPC classification number: G06T3/4015 , H04N5/35554 , H04N5/35581 , H04N5/378 , H04N9/045 , H04N2209/046
Abstract: Photocharge is integrated within a first plurality of pixels of an integrated-circuit image sensor during a first exposure interval. A read-out signal is output from each pixel of the first plurality of pixels upon conclusion of the first exposure interval, each read-out signal indicating a respective level of photocharge integrated within the corresponding pixel during the first exposure interval. Photocharge is also integrated within a second plurality of pixels during a second exposure interval that transpires concurrently with the first exposure interval and has a duration not more than half the duration of the first exposure interval. A read-out signal is output from each pixel of the second plurality of pixels at least twice with respect to the second exposure interval, with each such read-out signal indicating a respective level of photocharge integrated within the corresponding pixel during at least a portion of the second exposure interval.
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公开(公告)号：US20160198108A1
公开(公告)日：2016-07-07
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
CPC classification number: H04N5/374 , H01L27/14643 , H04N5/3577 , H04N5/365 , H04N5/3765 , H04N5/378
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.
Abstract translation: 集成电路图像传感器的像素阵列内的像素输出表示累积光电荷的模拟信号。 当像素输出模拟信号时，开始模拟信号的第一和第二模拟 - 数字转换，第一模数转换对应于像素内的光电荷累积的低光范围和第二模拟 - 数字转换， 对应于像素内的光电荷累积的较亮光范围的数字转换。
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