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US 8,947,570 B2Granted
Method, apparatus, and system providing a rectilinear pixel grid with radially scaled pixels
AssigneeMicron Technology, Inc.
InventorAmnon Silverstein
Life of this patent
Estimating the term…
Abstract
Pixels in an imaging device pixel array are sized according to their geographic location in the pixel array to compensate for various optical characteristics/issues. In one example, pixel size is increased according to the distance of the pixel from the x-axis and/or the y-axis of the pixel array to correct for lens shading.
Claims20
An imaging device, comprising:
- a pixel array comprising imaging pixels in which pixels located farther from an optical axis of the pixel array have a larger photosensitive area than a photosensitive area of pixels located closer to the optical axis of the pixel array, wherein the photosensitive area of the pixels increases with distance from the optical axis according to a normal distribution curve configured to correct pixel signal loss imposed on the pixel array by an associated lens.
An imaging processing system comprising:
- a processor;
- a pixel array;
- and
- an optical system for delivering an image to said pixel array, said optical system providing less light to photosensors of pixels near a periphery of said array than to photosensors of pixels near a center of said array;
- wherein said photosensors of said pixels near a periphery of said array are larger than photosensors of said pixels near a center of said array and the photosensitive area of the pixels increases with distance from the optical axis according to a normal distribution curve configured to correct pixel signal loss imposed on the pixel array by an associated lens.
2 more elements
A method of manufacturing an imaging device comprising:
- forming a pixel array comprising imaging pixels in which pixels located farther from an optical axis of the pixel array have a larger photosensitive area than a photosensitive area of pixels located closer to the optical axis of the pixel array, wherein the photosensitive areas of the pixels are formed so that they increase with distance from the optical axis according to a normal distribution curve configured to correct pixel signal loss imposed on the pixel array by an associated lens.
Dependencies are inferred from the claim text.