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    • 3. 发明申请
    • OPTICAL BLACK PIXEL READOUT FOR IMAGE SENSOR DATA CORRECTION
    • 用于图像传感器数据校正的光学黑色像素读数
    • US20140027611A1
    • 2014-01-30
    • US13558988
    • 2012-07-26
    • Gaurang Patel
    • Gaurang Patel
    • H01L27/146
    • H04N5/361H04N5/3655H04N5/378
    • Providing for analog averaging of optical black pixels of an image sensor is described herein. By way of example, optical black pixel signals can be output by a row of pixels and provided in a parallel manner to a readout circuit. The readout circuit can include an averaging circuit that, when activated, generates an analog average of signals received at the readout circuit. The analog average can be sampled at any suitable signal output of the readout circuit, or multiple samples can be acquired to mitigate temporal noise, improve yield, and so on. By utilizing analog averaging, optical black pixel information can be obtained much more quickly than with digital counterparts, and optical black pixels can be fully utilized, as well as utilized more flexibly, in generating the black pixel output. Further sensor die size can be reduced, by replacing digital adders, dividers or shifters with the averaging circuit.
    • 本文描述了提供图像传感器的光学黑色像素的模拟平均。 作为示例,光学黑色像素信号可以由一行像素输出并且以并行方式提供给读出电路。 读出电路可以包括平均电路,其在被激活时产生在读出电路处接收的信号的模拟平均值。 可以在读出电路的任何合适的信号输出端采样模拟平均值,或者可以采集多个采样以减轻时间噪声,提高产量等。 通过利用模拟平均,可以比数字对应物更快地获得光学黑色像素信息,并且可以充分利用光学黑色像素并且更灵活地利用它们来生成黑色像素输出。 通过用平均电路代替数字加法器,分频器或移位器,可以减小进一步的传感器管芯尺寸。
    • 7. 发明授权
    • Optical black pixel readout for image sensor data correction
    • 用于图像传感器数据校正的光学黑色像素读数
    • US09124829B2
    • 2015-09-01
    • US13558988
    • 2012-07-26
    • Gaurang Patel
    • Gaurang Patel
    • H01L27/00H04N5/361H04N5/365H04N5/378
    • H04N5/361H04N5/3655H04N5/378
    • Providing for analog averaging of optical black pixels of an image sensor is described herein. By way of example, optical black pixel signals can be output by a row of pixels and provided in a parallel manner to a readout circuit. The readout circuit can include an averaging circuit that, when activated, generates an analog average of signals received at the readout circuit. The analog average can be sampled at any suitable signal output of the readout circuit, or multiple samples can be acquired to mitigate temporal noise, improve yield, and so on. By utilizing analog averaging, optical black pixel information can be obtained much more quickly than with digital counterparts, and optical black pixels can be fully utilized, as well as utilized more flexibly, in generating the black pixel output. Further sensor die size can be reduced, by replacing digital adders, dividers or shifters with the averaging circuit.
    • 本文描述了提供图像传感器的光学黑色像素的模拟平均。 作为示例,光学黑色像素信号可以由一行像素输出并且以并行方式提供给读出电路。 读出电路可以包括平均电路,其在被激活时产生在读出电路处接收的信号的模拟平均值。 可以在读出电路的任何合适的信号输出端采样模拟平均值,或者可以采集多个采样以减轻时间噪声,提高产量等。 通过利用模拟平均,可以比数字对应物更快地获得光学黑色像素信息,并且可以充分利用光学黑色像素并且更灵活地利用它们来生成黑色像素输出。 通过用平均电路替换数字加法器,分频器或移位器,可以减小进一步的传感器管芯尺寸。
    • 8. 发明申请
    • Apparatus and methods for multi-sensor synchronization
    • 多传感器同步的装置和方法
    • US20090278951A1
    • 2009-11-12
    • US12151917
    • 2008-05-08
    • Markus LooseYing HuangGiuseppe RossiRoberto MarchesiniGaurang PatelQianjiang (Bob) MaoGregory ChowJohn Wallner
    • Markus LooseYing HuangGiuseppe RossiRoberto MarchesiniGaurang PatelQianjiang (Bob) MaoGregory ChowJohn Wallner
    • H04N5/228H04N5/225H04N5/04H03L7/00
    • H04N5/247H04N5/04
    • Apparatus and methods for synchronizing a plurality of image sensors in a video camera system. In one embodiment, a method includes generating a video sync signal, and resetting at least one internal clock divider in each image sensor in synchronization with the video sync signal at the beginning of each video frame. Another embodiment of a method of synchronizing a plurality of image sensors in a video camera system includes detecting a phase state of a signal of at least one internal clock divider in each sensor, wherein the phase state is relative to a system sync signal, and selecting a video output signal for each sensor based on the detected phase state of the at least one internal divider. In a third embodiment, the method includes asserting an asynchronous reset signal, stopping the system clocks in the system, de-asserting the asynchronous reset signal, while the system clocks are stopped, and restarting the system clocks. Each method may be used individually, or the methods can be combined in any combination. A video camera apparatus is also described.
    • 用于在摄像机系统中同步多个图像传感器的装置和方法。 在一个实施例中,一种方法包括在每个视频帧的开始处与视频同步信号同步地生成视频同步信号,并且在每个图像传感器中复位至少一个内部时钟分频器。 在摄像机系统中同步多个图像传感器的方法的另一实施例包括检测每个传感器中的至少一个内部时钟分频器的信号的相位状态,其中相位状态相对于系统同步信号,并且选择 基于所述至少一个内部分配器的检测到的相位状态的每个传感器的视频输出信号。 在第三实施例中,该方法包括断言异步复位信号,停止系统中的系统时钟,在系统时钟停止时取消断言异步复位信号,并重启系统时钟。 每种方法可以单独使用,也可以以任何组合的方式组合。 还描述了摄像机装置。