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1. 发明授权

US11223790B2 Pipelined row decoder topology for faster imager row decoding 有权
公开(公告)号：US11223790B2
公开(公告)日：2022-01-11
申请号：US16891031
申请日：2020-06-02
申请人： Foveon, Inc.
发明人： Ram Sena Bojja , Glenn Jay Keller , Alex Shiuh Wang
IPC分类号： H04N5/376 , H04N5/353 , H04N5/374 , H04N5/378 , H04N5/3745
摘要： An imaging array includes a plurality of rows of pixel sensors. A timing pattern generator generates timing pattern control signals and provide the timing pattern control signals to every row in the array. Timing pattern control signals generated during a timing pattern period directed to operate the pixel sensors in a selected row. A latched row driver circuit includes an enable latch in each row of the array responsive to a row address enable signal provided prior to the timing pattern period to gate the timing pattern control signals to the pixel sensors in the selected row at the start of the timing pattern period. A row address generator circuit is coupled to the timing pattern generator and to the enable latches in each row of the array to generate the row address enable signal for each selected row prior to the timing pattern period.

2. 发明申请

US20180324372A1 ELECTRONICALLY CONTROLLED GRADUATED DENSITY FILTERS IN STACKED IMAGE SENSORS 审中-公开
公开(公告)号：US20180324372A1
公开(公告)日：2018-11-08
申请号：US16024346
申请日：2018-06-29
申请人： Foveon, Inc.
发明人： Shrinath Ramaswami , Glenn J. Keller
IPC分类号： H04N5/355 , H04N5/353 , H04N5/235
CPC分类号： H04N5/35509 , H04N5/2353 , H04N5/3532 , H04N5/3535
摘要： A method for performing color density filtering of images captured in a digital camera having a mechanical shutter and an imaging array including a plurality of pixels each including different color sensors aligned with each other, including opening the mechanical shutter, resetting all of the color sensors in each pixel by asserting a row reset signal, separately asserting color-select signals for each color after the mechanical shutter is opened, independently starting exposure for each different color sensor at a color sensor exposure start time by de-asserting its color select signal, the exposure start time for each different color sensor being a function of a color density filter function, closing the mechanical shutter, and reading color exposure values from the color sensors by separately asserting color-select signals after the mechanical shutter has closed, the reading being unrelated to the start times for the color sensors.

3. 发明授权

US09530194B2 Method for processing highlights and saturated regions in a digital image 有权
公开(公告)号：US09530194B2
公开(公告)日：2016-12-27
申请号：US14168155
申请日：2014-01-30
申请人： Foveon, Inc.
发明人： Rastislav Lukac , Ken Doyle
IPC分类号： G06K9/00 , G06T5/00 , G06K9/40 , H04N9/64 , H04N9/68
CPC分类号： G06T5/008 , G06K9/40 , G06T5/001 , G06T2207/10024 , G06T2207/20172 , H04N9/646 , H04N9/68
摘要： A method for performing highlight restoration on a digital image includes comparing the pixels in the image with a saturation level value to identify saturated pixels. A saturation map of saturated pixels is generated. Each selected saturated pixel is identified as a restorable pixel only if at least one color channel of the pixel is unsaturated. For each restorable pixel, a group of the closest unsaturated pixels above, below, to the left, and to the right of the select saturated pixel is identified. A replacement pixel value is generated for each saturated color channel of the restorable pixel, using a combination of the pixel values of the unsaturated color channels of the restorable pixel and the pixel values of the corresponding color channels of the nearby unsaturated pixels.

4. 发明授权

US09147235B2 Method for processing highlights and saturated regions in a digital image 有权
标题翻译：在数字图像中处理高光和饱和区域的方法
公开(公告)号：US09147235B2
公开(公告)日：2015-09-29
申请号：US14168189
申请日：2014-01-30
申请人： Foveon, Inc.
发明人： Rastislav Lukac , Ken Doyle
IPC分类号： G06K9/00 , G06T5/00 , G06K9/40 , H04N9/64 , H04N9/68
CPC分类号： G06T5/008 , G06K9/40 , G06T5/001 , G06T2207/10024 , G06T2207/20172 , H04N9/646 , H04N9/68
摘要： A method for performing highlight restoration on a digital image includes comparing the pixels in the image with a saturation level value to identify saturated pixels. A saturation map of saturated pixels is generated. Each selected saturated pixel is identified as a restorable pixel only if at least one color channel of the pixel is unsaturated. For each restorable pixel, a group of the closest unsaturated pixels above, below, to the left, and to the right of the select saturated pixel is identified. A replacement pixel value is generated for each saturated color channel of the restorable pixel, using a combination of the pixel values of the unsaturated color channels of the restorable pixel and the pixel values of the corresponding color channels of the nearby unsaturated pixels.
摘要翻译：用于在数字图像上进行高光恢复的方法包括将图像中的像素与饱和度电平值进行比较以识别饱和像素。产生饱和像素的饱和度图。只有当像素的至少一个颜色通道不饱和时，每个选定的饱和像素被识别为可恢复的像素。对于每个可恢复像素，识别出选择饱和像素的上方，下方，左侧和右侧的一组最近的不饱和像素。使用可恢复像素的不饱和色彩通道的像素值与附近不饱和像素的相应颜色通道的像素值的组合，为可恢复像素的每个饱和色彩通道生成替换像素值。

5. 发明申请

US20040178466A1 Vertical color filter sensor group and semiconductor integrated circuit fabrication method for fabricating same 有权
标题翻译：垂直滤色器传感器组和半导体集成电路制造方法
公开(公告)号：US20040178466A1
公开(公告)日：2004-09-16
申请号：US10355950
申请日：2003-01-31
申请人： FOVEON, INC.
发明人： Richard B. Merrill , Russel A. Martin
IPC分类号： H01L031/00
CPC分类号： H01L27/14685 , H01L27/14621 , H01L27/14647 , H01L31/1075
摘要： A vertical color filter sensor group, formed on a substrate (preferably a semiconductor substrate) by a semiconductor integrated circuit fabrication process, and including at least two vertically stacked, photosensitive sensors. Other aspects of the invention are arrays of such vertical color filter sensor groups, and methods for fabricating such vertical color filter sensor groups and arrays thereof. In some embodiments, the sensor group is a block of solid material having a readout surface. At least two vertically stacked sensors are formed in the block and a trench contact is provided between one of the sensors and the readout surface.
摘要翻译：一种垂直滤色器传感器组，通过半导体集成电路制造工艺在基板（优选半导体基板）上形成，并且包括至少两个垂直堆叠的光敏传感器。本发明的其他方面是这种垂直滤色器传感器组的阵列，以及用于制造这种垂直滤色器传感器组及其阵列的方法。在一些实施例中，传感器组是具有读出表面的固体材料块。在块中形成至少两个垂直堆叠的传感器，并且在传感器之一和读出表面之间提供沟槽接触。

6. 发明申请

US20020058353A1 Vertical color filter detector group and array 有权
标题翻译：垂直滤色片检测器组和阵列
公开(公告)号：US20020058353A1
公开(公告)日：2002-05-16
申请号：US09884863
申请日：2001-06-18
申请人： Foveon, Inc.
发明人： Richard B. Merrill
IPC分类号： H01L021/00 , H01L021/66 , G01R031/26
CPC分类号： H01L27/14647 , H01L27/14621
摘要： A vertical color filter detector group according to the present invention is formed on a semiconductor substrate and comprises at least six layers of alternating p-type and n-typed doped regions. PN junctions between the layers operate as photodiodes with spectral sensitivities that depend on the absorption depth versus wavelength of light in the semiconductor. Alternate layers, preferably the n-type layers, are detector layers to collect photo-generated carriers, while the intervening layers, preferably p-type, are reference layers and are connected in common to a reference potential referred to as ground. Each detector group includes a blue-sensitive detector layer at an n-type layer at the surface of the semiconductor, a green-sensitive detector layer at an n-type layer deeper in the semiconductor, and a red-sensitive detector layer at the n-type layer deepest in the semiconductor. The blue-sensitive detector layer at the surface of the semiconductor may have a reference layer only below it, while the red- and green-sensitive detector layers have reference layers above and below them. Three sets of active pixel sensor circuitry are coupled to the three detector layers, such that three active pixel sensors are formed using the group of three co-located detectors of the vertical color filter detector group.
摘要翻译：根据本发明的垂直滤色器检测器组形成在半导体衬底上并且包括至少六层交替的p型和n型掺杂区域。层之间的PN结作为具有光谱灵敏度的光电二极管起作用，其依赖于半导体中的光的吸收深度与波长的关系。交替的层，优选n型层，是收集光生载流子的检测器层，而中间层，优选p型是参考层，并且共同连接到被称为接地的参考电位。每个检测器组包括在半导体表面处的n型层处的蓝色敏感检测器层，在半导体中较深的n型层处的绿色敏感检测器层和在n处的红色敏感检测器层型层最深的半导体。在半导体表面处的蓝色敏感检测器层可以仅在其下方具有参考层，而红色和绿色敏感检测器层在其上方和下方具有参考层。三组有源像素传感器电路耦合到三个检测器层，使得使用垂直滤色器检测器组的三个共位检测器的组来形成三个有源像素传感器。

7. 发明授权

US10897592B1 Combined programmable gain amplifier and comparator for low power and low area readout in image sensor 有权
公开(公告)号：US10897592B1
公开(公告)日：2021-01-19
申请号：US16572580
申请日：2019-09-16
申请人： Foveon, Inc.
发明人： SundaraSiva Rao Giduturi , Glenn Jay Keller
IPC分类号： H04N5/378 , H03F3/45 , H03G3/30
摘要： A switchable amplifier and comparator circuit includes an operational amplifier having an inverting input, a non-inverting input, a first differential output and a second differential output, the first differential output switchably coupled to the inverting input and the second differential output switchably coupled to the non-inverting input. A first feedback capacitor is coupled to the inverting input and switchably coupled to the first differential output, a second feedback capacitor is coupled to the non-inverting input and switchably coupled to the second differential output. A capacitive load is switchably coupled between the first differential output and the second differential output. A diode clamp circuit is switchably coupled between the first differential output and the second differential output. A resistive load is switchably coupled between the first differential output and the second differential output.

8. 发明授权

US10616535B1 Sub-sampled color channel readout wiring for vertical detector pixel sensors 有权
公开(公告)号：US10616535B1
公开(公告)日：2020-04-07
申请号：US16148951
申请日：2018-10-01
申请人： Foveon, Inc.
发明人： Shrinath Ramaswami , Tatsuya Inui , Shigemi Yamazaki , Jonathan Yu , Glenn Keller
IPC分类号： H04N9/04 , H01L27/146 , H04N5/378 , H04N5/376 , H04N5/374
CPC分类号： H04N9/04511 , H01L27/14645 , H04N5/376 , H04N5/378 , H04N9/04557 , H04N5/374
摘要： In an array containing rows and columns of multi-color vertical detector color pixel sensors disposed in a rows and columns of the array, a readout wiring architecture includes a plurality of row-select lines for each row of the array, equal to the number of colors in the vertical detector color pixel sensors, an individual column line for each column, a transfer transistor for each individual color detector coupled between a color detector and a column line associated with the column in which the color detector is disposed. Each transfer transistor has a gate coupled to one of the plurality of row-select lines in a row in which the vertical detector color pixel sensor is disposed. The gates of at least some of the transfer transistors in each row for each color detector in adjacent columns of the array are coupled to different ones of the row-select lines for that row.

9. 发明授权

US10523885B2 Column line clamp circuit for imaging array 有权
公开(公告)号：US10523885B2
公开(公告)日：2019-12-31
申请号：US15492951
申请日：2017-04-20
申请人： Foveon, Inc.
发明人： Sudipta Saha , Shivani Gupta
IPC分类号： H04N5/378 , H04N5/16 , H04N5/18 , H04N5/359
摘要： In an imaging array having a plurality of pixel sensors arranged in a plurality of rows and columns, pixel data being read out on column lines of the array, a column line voltage clamp circuit for column lines of the array includes a master voltage clamp circuit coupled to provide a reference voltage clamp level on a reference node, and a slave voltage clamp circuit coupled to each column line in the imaging array, each slave voltage clamp circuit configured to clamp voltage on the column line to a column voltage clamp level derived from the reference voltage level.

10. 发明授权

US10178322B2 Method of adjusting digital camera image processing parameters 有权
公开(公告)号：US10178322B2
公开(公告)日：2019-01-08
申请号：US15097619
申请日：2016-04-13
申请人： Foveon, Inc.
发明人： Rastislav Lukac
IPC分类号： H04N5/235 , G06T1/20
摘要： A method for adjusting predetermined ISO-dependent image processing parameters for images captured by a digital camera includes measuring the exposure deviation in exposure units from an optimal exposure as determined by the camera during an image capture process, deriving an estimated camera sensitivity from the exposure deviation, and adjusting the ISO-dependent image processing parameters for images captured by the camera as a function of the derived estimated camera sensitivity.

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