公开(公告)号：US20150145007A1

公开(公告)日：2015-05-28

申请号：US14089557

申请日：2013-11-25

申请人： APTINA IMAGING CORPORATION

发明人： Shung Chieh ,  BRIAN KEELAN

IPC分类号： H01L27/146

CPC分类号： H01L27/1461 ,  H01L27/14612 ,  H01L27/1464

摘要： An imaging system may include an image sensor having an array of image pixels. Some image pixels in the array may be provided with responsivity adjustment structures. For example, broadband pixels in a pixel array may include responsivity adjustment circuitry. The responsivity adjustment circuitry may be configured to narrow the spectral response or to reduce the conversion gain of the broadband pixels in high light conditions. For example, a deep photodiode may divert charge away from a signal photodiode during an integration period. The deep photodiode may divert charge to a power supply or the charge may be transferred to a storage node and used in image processing, if desired. The responsivity adjustment circuitry may include channel-dependent conversion circuitry that is formed in pixels corresponding to a first color channel, while the conversion gains of pixels corresponding to a second color channel may remain fixed.

摘要翻译： 成像系统可以包括具有图像像素阵列的图像传感器。 阵列中的一些图像像素可以具有响应度调整结构。 例如，像素阵列中的宽带像素可以包括响应度调整电路。 响应度调整电路可以被配置为在高光条件下缩小光谱响应或减小宽带像素的转换增益。 例如，深度光电二极管可以在积分期间将电荷从信号光电二极管转移。 深光电二极管可以将电荷转移到电源，或者如果需要，电荷可以被传送到存储节点并用于图像处理。 响应度调整电路可以包括以对应于第一颜色通道的像素形成的依赖于频道的转换电路，而对应于第二颜色通道的像素的转换增益可以保持固定。