Method of capturing an image with an image sensor

摘要

A method may include a cycle of reading a current pixel including connecting the capacitive node of the pixel to a capacitive node of a previous pixel already read, connecting the capacitive node of the current pixel and the capacitive node of a previous pixel to an output line, reading a first voltage of the capacitive node of the pixel through the output line, transferring charges from the accumulation node to the capacitive node of the pixel, reading a second voltage of the capacitive node of the pixel through the output line, and disconnecting the capacitive node from the capacitive node of a previous pixel, and a cycle of reading a next pixel. This cycle may include accumulating charges in the accumulation node of the next pixel while the capacitive node of the current pixel is connected to a capacitive node of a previous pixel.

主权项

1. A method for capturing an image with an array of pixels, each pixel comprising a photosensitive accumulation node, and a capacitive node coupled thereto, the method comprising:
capturing a first image without connecting a capacitive node of a current pixel to at least one capacitive node of previous pixels; analyzing the first image; and based upon a result of the analysis of the first image, capturing a second image by performing at least:
a cycle of reading the current pixel comprising
connecting the capacitive node of the current pixel to the at least one capacitive node of the previous pixels already read,coupling the capacitive node of the current pixel to an output line,coupling the at least one capacitive node of the previous pixels to the output line,reading a first voltage of the capacitive node of the current pixel through the output line,transferring charge from an accumulation node to the capacitive node of the current pixel,reading a second voltage of the capacitive node of the current pixel through the output line, anddisconnecting the capacitive node of the current pixel from the at least one capacitive node of the previous pixels; anda cycle of reading a next pixel overlapping the cycle of reading the current pixel and comprising accumulating charge in an accumulation node of the next pixel while the capacitive node of the current pixel is connected to the at least one capacitive node of the previous pixels.