IMAGING SYSTEMS WITH IMAGE PIXELS HAVING ADJUSTABLE SPECTRAL RESPONSES
First Claim
1. An image sensor, comprising:
- an image pixel array having a first group of image pixels and a second group of image pixels; and
spectral response adjustment structures in the first group of image pixels, wherein the spectral response adjustment structures are configured to adjust a spectral response of each image pixel in the first group of image pixels during operation of the image sensor.
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Abstract
An imaging system may include an image sensor having an array of image pixels. Some image pixels in the array may be provided with spectral response adjustment structures. For example, a plurality of broadband pixels in the array may include spectral response adjustment structures. The spectral response adjustment structures may be configured to narrow the spectral response of the broadband pixels in high light conditions. For example, the spectral response of the broadband pixels may transition from clear to gray, from clear to green, or from yellow to green as the light level increases. The spectral response adjustment structures may, for example, be formed from photochromic materials or electrochromic elements. Processing circuitry in the imaging system may generate a color correction matrix for an image based at least partly on the state of the spectral response adjustment structures.
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Citations
23 Claims
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1. An image sensor, comprising:
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an image pixel array having a first group of image pixels and a second group of image pixels; and spectral response adjustment structures in the first group of image pixels, wherein the spectral response adjustment structures are configured to adjust a spectral response of each image pixel in the first group of image pixels during operation of the image sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An image sensor, comprising:
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a substrate; an array of image pixels formed in the substrate, wherein the array of image pixels includes first and second groups of image pixels and comprises a color filter array; and spectral response adjustment structures adjacent to the color filter array, wherein the spectral response adjustment structures are configured to adjust respective spectral responses of image pixels in the first group of image pixels. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A method for operating an imaging device having an image sensor and processing circuitry, wherein the image sensor comprises an image pixel array having spectral response adjustment structures that are configured to adjust a spectral response of at least one image pixel in the image pixel array, the method comprising:
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with the processing circuitry, determining illuminant information and light level information for an image; with the processing circuitry, determining a state of the spectral response adjustment structures; and with the processing circuitry, generating a color correction matrix for the image based on the illuminant information, the light level information, and the state of the spectral response adjustment structures. - View Dependent Claims (21, 22, 23)
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Specification