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Column-based high dynamic range imaging systems

  • US 9,338,372 B2
  • Filed: 07/11/2013
  • Issued: 05/10/2016
  • Est. Priority Date: 09/19/2012
  • Status: Active Grant
First Claim
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1. An image sensor, comprising:

  • an array of image pixels arranged in pixel rows and pixel columns;

    a conductive column line coupled to each pixel column;

    column readout circuitry coupled to the pixel columns through the conductive column lines; and

    row control circuitry configured to operate the array of image pixels to capture a column-interleaved image with short-exposure pixel values and long-exposure pixel values that are interleaved in a column-based pattern, wherein the row control circuity comprises first and second reset lines coupled to each pixel row, wherein the first reset lines are coupled to a first set of pixels in each pixel row that capture the long-exposure pixel values and the second reset lines are coupled to a second set of pixels in each pixel row that capture the short-exposure pixel values, and wherein the row control circuitry is configured to provide reset control signals over the first and second reset lines to perform at least two resets of both the first and second sets of pixels between consecutive readouts of the long and short-exposure pixel values from the array of image pixels.

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