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1. 发明授权

US08674282B2 Pumped pinned photodiode pixel array 有权
标题翻译：泵浦光电二极管像素阵列
公开(公告)号：US08674282B2
公开(公告)日：2014-03-18
申请号：US13242865
申请日：2011-09-23
申请人： Chung Chun Wan , Xiangli Li
发明人： Chung Chun Wan , Xiangli Li
IPC分类号： H01L27/00
CPC分类号： H01L27/14887 , H01L27/1461 , H01L27/14612 , H01L27/14654 , H04N5/3532 , H04N5/37452
摘要： The present invention relates to a pumped pixel that includes a first photo-diode accumulating charge in response to impinging photons, a second photo-diode and a floating diffusion positioned on a substrate of the pixel. The pixel also includes a charge barrier positioned on the substrate between the first photo-diode and the second photo-diode, where the charge barrier temporarily blocks charge transfer between the first photo-diode and the second photo-diode. Also included is a pump gate positioned on the substrate adjacent to the charge barrier. The pump gate pumps the accumulated charge from the first photo-diode to the second photo-diode through the charge barrier in response to a pump voltage applied by a controller. Also included is a transfer gate positioned on the substrate between the second photo-diode and the floating diffusion. The transfer gate transfers the pumped charge from the second photo-diode to the floating diffusion in response to a transfer voltage applied by a controller.
摘要翻译：本发明涉及一种泵浦像素，其包括响应于入射光子的第一光电二极管累积电荷，位于像素的衬底上的第二光电二极管和浮动扩散。像素还包括位于第一光电二极管和第二光电二极管之间的衬底上的电荷势垒，其中电荷势垒暂时阻止第一光电二极管和第二光电二极管之间的电荷转移。还包括位于基板上的与栅极相邻的泵浦门。泵控制器响应于由控制器施加的泵浦电压，将累积的电荷从第一光电二极管泵送到第二光电二极管。还包括位于第二光电二极管和浮动扩散之间的衬底上的传输门。转移栅极响应于由控制器施加的转印电压将泵送的电荷从第二光电二极管传送到浮动扩散。

2. 发明授权

US08466402B2 Imaging pixels with shielded floating diffusions 有权
标题翻译：具有屏蔽浮动扩散的成像像素
公开(公告)号：US08466402B2
公开(公告)日：2013-06-18
申请号：US12911702
申请日：2010-10-25
申请人： Chung Chun Wan , Xiangli Li
发明人： Chung Chun Wan , Xiangli Li
IPC分类号： H01L27/00
CPC分类号： H01L27/14609 , G01J1/44 , H01L27/14603 , H01L27/14623
摘要： An imaging system may include imaging pixels. Each imaging pixel may include floating diffusion metal lines associated with a floating diffusion node in that imaging pixel, pixel output metal lines associated with a pixel output, and additional metal lines. The floating diffusion metal lines node may be at least partially surrounded by the pixel output metal lines. Because the floating diffusion metal lines are at least partially surrounded by the pixel output metal lines, the parasitic capacitance between the floating diffusion metal lines and the additional metal lines may be reduced. A source-follower transistor in each imaging pixel may provide a gain between the floating diffusion metal lines and the pixel output metal lines. Due to the Miller effect, the gain induced by the source-follower transistor may reduce the parasitic capacitance between the floating diffusion metal lines and the pixel output metal lines.
摘要翻译：成像系统可以包括成像像素。每个成像像素可以包括与该成像像素中的浮动扩散节点相关联的浮动扩散金属线，与像素输出相关联的像素输出金属线以及附加金属线。浮动扩散金属线节点可以至少部分地被像素输出金属线包围。由于浮动扩散金属线至少部分地被像素输出金属线包围，所以可以减小浮动扩散金属线与附加金属线之间的寄生电容。每个成像像素中的源极 - 跟随器晶体管可以在浮动扩散金属线和像素输出金属线之间提供增益。由于米勒效应，由源极 - 跟随器晶体管感应的增益可以减小浮动扩散金属线与像素输出金属线之间的寄生电容。

3. 发明申请

US20120274744A1 STRUCTURED LIGHT IMAGING SYSTEM 有权
标题翻译：结构光成像系统
公开(公告)号：US20120274744A1
公开(公告)日：2012-11-01
申请号：US13353593
申请日：2012-01-19
申请人： CHUNG CHUN WAN , Xiangli Li , Gennadiy Agranov
发明人： CHUNG CHUN WAN , Xiangli Li , Gennadiy Agranov
IPC分类号： H04N13/02 , H04N5/335
CPC分类号： H04N13/296 , G01S17/10 , G01S17/89 , H04N5/2354 , H04N5/37452 , H04N5/378 , H04N13/254
摘要： Structured light imaging method and systems are described. An imaging method generates a stream of light pulses, converts the stream after reflection by a scene to charge, stores charge converted during the light pulses to a first storage element, and stores charge converted between light pulses to a second storage element. A structured light image system includes an illumination source that generates a stream of light pulses and an image sensor. The image sensor includes a photodiode, first and second storage elements, first and second switches, and a controller that synchronizes the image sensor to the illumination source and actuates the first and second switches to couple the first storage element to the photodiode to store charge converted during the light pulses and to couple the second storage element to the photodiode to store charge converted between the light pulses.
摘要翻译：描述了结构光成像方法和系统。成像方法产生光脉冲流，通过场景反射后的流转换为电荷，将在光脉冲期间转换的电荷存储到第一存储元件，并将在光脉冲之间转换的电荷存储到第二存储元件。结构化光图像系统包括产生光脉冲流的照明源和图像传感器。图像传感器包括光电二极管，第一和第二存储元件，第一和第二开关以及使图像传感器与照明源同步并且致动第一和第二开关以将第一存储元件耦合到光电二极管以存储电荷转换的控制器并且将第二存储元件耦合到光电二极管以存储在光脉冲之间转换的电荷。

4. 发明申请

US20120097842A1 IMAGING PIXELS WITH SHIELDED FLOATING DIFFUSIONS 有权
标题翻译：具有屏蔽浮动扩散的成像像素
公开(公告)号：US20120097842A1
公开(公告)日：2012-04-26
申请号：US12911702
申请日：2010-10-25
申请人： Chung Chun Wan , Xiangli Li
发明人： Chung Chun Wan , Xiangli Li
IPC分类号： G01J1/44
CPC分类号： H01L27/14609 , G01J1/44 , H01L27/14603 , H01L27/14623
摘要： An imaging system may include imaging pixels. Each imaging pixel may include floating diffusion metal lines associated with a floating diffusion node in that imaging pixel, pixel output metal lines associated with a pixel output, and additional metal lines. The floating diffusion metal lines node may be at least partially surrounded by the pixel output metal lines. Because the floating diffusion metal lines are at least partially surrounded by the pixel output metal lines, the parasitic capacitance between the floating diffusion metal lines and the additional metal lines may be reduced. A source-follower transistor in each imaging pixel may provide a gain between the floating diffusion metal lines and the pixel output metal lines. Due to the Miller effect, the gain induced by the source-follower transistor may reduce the parasitic capacitance between the floating diffusion metal lines and the pixel output metal lines.
摘要翻译：成像系统可以包括成像像素。每个成像像素可以包括与该成像像素中的浮动扩散节点相关联的浮动扩散金属线，与像素输出相关联的像素输出金属线以及附加金属线。浮动扩散金属线节点可以至少部分地被像素输出金属线包围。由于浮动扩散金属线至少部分地被像素输出金属线包围，所以可以减小浮动扩散金属线与附加金属线之间的寄生电容。每个成像像素中的源极 - 跟随器晶体管可以在浮动扩散金属线和像素输出金属线之间提供增益。由于米勒效应，由源极 - 跟随器晶体管感应的增益可以减小浮动扩散金属线与像素输出金属线之间的寄生电容。

5. 发明授权

US09083905B2 Structured light imaging system 有权
标题翻译：结构光成像系统
公开(公告)号：US09083905B2
公开(公告)日：2015-07-14
申请号：US13353593
申请日：2012-01-19
申请人： Chung Chun Wan , Xiangli Li , Gennadiy Agranov
发明人： Chung Chun Wan , Xiangli Li , Gennadiy Agranov
IPC分类号： H04N5/235 , H04N9/73 , G03B7/00 , H04N5/3745 , G01S17/10 , G01S17/89
CPC分类号： H04N13/296 , G01S17/10 , G01S17/89 , H04N5/2354 , H04N5/37452 , H04N5/378 , H04N13/254
摘要： Structured light imaging method and systems are described. An imaging method generates a stream of light pulses, converts the stream after reflection by a scene to charge, stores charge converted during the light pulses to a first storage element, and stores charge converted between light pulses to a second storage element. A structured light image system includes an illumination source that generates a stream of light pulses and an image sensor. The image sensor includes a photodiode, first and second storage elements, first and second switches, and a controller that synchronizes the image sensor to the illumination source and actuates the first and second switches to couple the first storage element to the photodiode to store charge converted during the light pulses and to couple the second storage element to the photodiode to store charge converted between the light pulses.
摘要翻译：描述了结构光成像方法和系统。成像方法产生光脉冲流，通过场景反射后的流转换为电荷，将在光脉冲期间转换的电荷存储到第一存储元件，并将在光脉冲之间转换的电荷存储到第二存储元件。结构化光图像系统包括产生光脉冲流的照明源和图像传感器。图像传感器包括光电二极管，第一和第二存储元件，第一和第二开关以及使图像传感器与照明源同步并且致动第一和第二开关以将第一存储元件耦合到光电二极管以存储电荷转换的控制器并且将第二存储元件耦合到光电二极管以存储在光脉冲之间转换的电荷。

6. 发明授权

US08928792B1 CMOS image sensor with global shutter, rolling shutter, and a variable conversion gain, having pixels employing several BCMD transistors coupled to a single photodiode and dual gate BCMD transistors for charge storage and sensing 有权
标题翻译：具有全局快门，滚动快门和可变转换增益的CMOS图像传感器，具有使用耦合到单个光电二极管的多个BCMD晶体管的像素和用于电荷存储和感测的双栅极BCMD晶体管
公开(公告)号：US08928792B1
公开(公告)日：2015-01-06
申请号：US13153369
申请日：2011-06-03
申请人： Jaroslav Hynecek , Gennadiy Agranov , Xiangli Li , Hirofumi Komori , Xia Zhao , Chung Chun Wan
发明人： Jaroslav Hynecek , Gennadiy Agranov , Xiangli Li , Hirofumi Komori , Xia Zhao , Chung Chun Wan
IPC分类号： H04N5/335 , H04N5/359 , H04N5/3745
CPC分类号： H01L27/14612 , H01L27/14605 , H01L27/14614 , H01L27/14645 , H01L27/14656 , H01L27/14679 , H04N5/3591 , H04N5/3745
摘要： The invention describes a solid-state CMOS image sensor array and discloses image sensor array pixels with global and rolling shutter capabilities that utilize multiple BCMD transistors for a single photodiode, for charge storage and sensing. Thus, the valuable pixel area saved by employing the BCMD transistor for charge storage and sensing is used by placing several BCMD transistors coupled to one photodiode. This increases the Dynamic Range (DR) of the sensor, since the same photodiode can integrate charge for different integration times, both long and short. This allows sensing of two different image signals from a single pixel without saturation, a low level signal with long integration time followed by a high level signal with short integration time. The signal processing circuits located at the periphery of the array can then process these signals into a single Wide Dynamic Range (WDR) output. Further disclosed is an image sensor array with pixels that use BCMD transistors for charge storage and sensing having multiple concentric gates, which allows changing the conversion gain of the BCMD transistors by applying various biases to the gates. Variable conversion gain is a useful feature when building WDR sensors since low conversion gain and high well capacity allows detection of high level signals and the same structure can be used to detect, at the same time, low level signals with high conversion gain and thus low noise.
摘要翻译：本发明描述了一种固态CMOS图像传感器阵列，并公开了具有全局和滚动快门功能的图像传感器阵列像素，其利用用于单个光电二极管的多个BCMD晶体管用于电荷存储和感测。因此，通过使用耦合到一个光电二极管的几个BCMD晶体管来使用通过使用用于电荷存储和感测的BCMD晶体管节省的有价值的像素区域。这增加了传感器的动态范围（DR），因为相同的光电二极管可以集成不同集成时间的电荷，包括长和短。这允许感测来自不饱和的单个像素的两个不同图像信号，具有长积分时间的低电平信号，随后是具有短积分时间的高电平信号。位于阵列外围的信号处理电路然后可以将这些信号处理成单个宽动态范围（WDR）输出。进一步公开的是具有使用BCMD晶体管的像素的图像传感器阵列，用于具有多个同心门的电荷存储和感测，这允许通过向栅极应用各种偏压来改变BCMD晶体管的转换增益。可变转换增益是构建WDR传感器的有用特征，因为低转换增益和高容量能够允许检测高电平信号，并且可以使用相同的结构同时检测具有高转换增益的低电平信号，从而低噪声。

7. 发明授权

US08462250B2 Imager pixel architecture with enhanced column discharge and method of operation 有权
标题翻译：具有增强色谱柱放电和操作方法的成像器像素架构
公开(公告)号：US08462250B2
公开(公告)日：2013-06-11
申请号：US13073158
申请日：2011-03-28
申请人： Chung Chun Wan , Xiangli Li
发明人： Chung Chun Wan , Xiangli Li
IPC分类号： H04N5/335
CPC分类号： H04N5/376 , H04N5/378
摘要： A pixel circuit includes a photosensor and a floating diffusion node. A circuit is coupled to the floating diffusion node, for selectively providing a pixel output signal to a column line. A reset circuit, which resets the floating diffusion node, is configured to be activated by the column line. A pullup circuit is included for controlling the reset circuit through a signal on the column line. A discharge circuit, which is separate from the reset circuit, is used for discharging the pixel output signal on the column line. The discharge circuit includes a transistor having a first source/drain terminal coupled to the column line and a second source/drain terminal coupled to a fixed voltage level. The gate of the transistor activates the discharging of the column line.
摘要翻译：像素电路包括光电传感器和浮动扩散节点。电路耦合到浮动扩散节点，用于选择性地向列线提供像素输出信号。将浮动扩散节点复位的复位电路配置为由列线激活。包括上拉电路，用于通过列线上的信号来控制复位电路。与复位电路分离的放电电路用于对列线上的像素输出信号进行放电。放电电路包括具有耦合到列线的第一源极/漏极端子和耦合到固定电压电平的第二源极/漏极端子的晶体管。晶体管的栅极激活列线的放电。

8. 发明申请

US20120188430A1 IMAGER PIXEL ARCHITECTURE WITH ENHANCED COLUMN DISCHARGE AND METHOD OF OPERATION 有权
标题翻译：具有增强柱排放的图像像素架构和操作方法
公开(公告)号：US20120188430A1
公开(公告)日：2012-07-26
申请号：US13073158
申请日：2011-03-28
申请人： CHUNG CHUN WAN , Xiangli Li
发明人： CHUNG CHUN WAN , Xiangli Li
IPC分类号： H04N5/335
CPC分类号： H04N5/376 , H04N5/378
摘要： A pixel circuit includes a photosensor and a floating diffusion node. A circuit is coupled to the floating diffusion node, for selectively providing a pixel output signal to a column line. A reset circuit, which resets the floating diffusion node, is configured to be activated by the column line. A pullup circuit is included for controlling the reset circuit through a signal on the column line. A discharge circuit, which is separate from the reset circuit, is used for discharging the pixel output signal on the column line. The discharge circuit includes a transistor having a first source/drain terminal coupled to the column line and a second source/drain terminal coupled to a fixed voltage level. The gate of the transistor activates the discharging of the column line.
摘要翻译：像素电路包括光电传感器和浮动扩散节点。电路耦合到浮动扩散节点，用于选择性地向列线提供像素输出信号。将浮动扩散节点复位的复位电路配置为由列线激活。包括上拉电路，用于通过列线上的信号来控制复位电路。与复位电路分离的放电电路用于对列线上的像素输出信号进行放电。放电电路包括具有耦合到列线的第一源极/漏极端子和耦合到固定电压电平的第二源极/漏极端子的晶体管。晶体管的栅极激活列线的放电。

9. 发明申请

US20110310278A1 SYSTEMS AND METHODS FOR ADAPTIVE CONTROL AND DYNAMIC RANGE EXTENSION OF IMAGE SENSORS 有权
标题翻译：自适应控制和动态范围扩展图像传感器的系统和方法
公开(公告)号：US20110310278A1
公开(公告)日：2011-12-22
申请号：US12816575
申请日：2010-06-16
申请人： Yingjun Bai , Xiangli Li
发明人： Yingjun Bai , Xiangli Li
IPC分类号： H04N5/335 , H04N5/235
CPC分类号： H04N9/045 , H04N5/35554 , H04N5/35563 , H04N5/3745
摘要： Systems and methods are provided for obtaining adaptive exposure control and dynamic range extension of image sensors. In some embodiments, an image sensor of an image system can include a pixel array with one or more clear pixels. The image system can separately control the amount of time that pixels in different lines of the pixel array are exposed to light. As a result, the image system can adjust the exposure times to prevent over-saturation of the clear pixels, while also allowing color pixels of the pixel array to be exposed to light for a longer period of time. In some embodiments, the dynamic range of the image system can be extended through a reconstruction and interpolation process. For example, a signal reconstruction module can extend the dynamic range of one or more green pixels by combining signals associated with green pixels in different lines of the pixel array.
摘要翻译：提供了用于获得图像传感器的自适应曝光控制和动态范围扩展的系统和方法。在一些实施例中，图像系统的图像传感器可以包括具有一个或多个透明像素的像素阵列。图像系统可以分别控制像素阵列的不同行中的像素暴露于光的时间量。结果，图像系统可以调整曝光时间以防止透明像素的过度饱和，同时还允许像素阵列的彩色像素暴露于较长时间的光。在一些实施例中，图像系统的动态范围可以通过重建和内插处理来扩展。例如，信号重建模块可以通过组合与像素阵列的不同行中的绿色像素相关联的信号来扩展一个或多个绿色像素的动态范围。

10. 发明授权

US07858914B2 Method and apparatus for reducing dark current and hot pixels in CMOS image sensors 有权
标题翻译：用于减少CMOS图像传感器中的暗电流和热像素的方法和装置
公开(公告)号：US07858914B2
公开(公告)日：2010-12-28
申请号：US11942847
申请日：2007-11-20
申请人： Xiangli Li , Richard Mauritzson , Xiaofeng Fan , John Ladd
发明人： Xiangli Li , Richard Mauritzson , Xiaofeng Fan , John Ladd
IPC分类号： H04N3/14 , H04N5/335 , H04N5/217
CPC分类号： H04N5/361 , H01L27/14609 , H01L27/14643
摘要： Methods and apparatuses for reducing dark current and hot pixels in CMOS image sensors. A pixel apparatus includes a photosensor capable of generating dark current, a floating diffusion region coupled to the photosensor by way of a charge transfer transistor, a rest transistor connected between the floating diffusion region and an array pixel supply voltage. The array supply voltage varies between first and second voltages when sampling pixel signals from the pixel.
摘要翻译：降低CMOS图像传感器中的暗电流和热像素的方法和装置。像素装置包括能够产生暗电流的光电传感器，通过电荷转移晶体管耦合到光传感器的浮动扩散区域，连接在浮置扩散区域和阵列像素电源电压之间的静止晶体管。当从像素采样像素信号时，阵列电源电压在第一和第二电压之间变化。

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