Image capture device, pixel, and method providing improved phase detection auto-focus performance
First Claim
1. An image capture device, comprising:
- an imaging area comprising a plurality of color-filtered pixels arranged in Bayer pattern rows and Bayer pattern columns, wherein;
each color-filtered pixel comprises a two-dimensional array of photodetectors;
each photodetector in an array of photodetectors is electrically isolated from each other photodetector in the array of photodetectors; and
a different microlens is disposed over each array of photodetectors;
a pixel readout circuit comprising, for each color-filtered pixel;
a shared readout circuit associated with the array of photodetectors for the color-filtered pixel; and
a set of charge transfer transistors, each charge transfer transistor operable to connect a photodetector in the array of photodetectors to the shared readout circuit; and
a processor configured to;
operate the sets of charge transfer transistors for the color-filtered pixels in a first Bayer pattern row to detect a first phase difference in a first set of edges of an image; and
operate the sets of charge transfer transistors for the color-filtered pixels in a second Bayer pattern row to detect a second phase difference in a second set of edges of the image, the first set of edges orthogonal to the second set of edges.
1 Assignment
0 Petitions
Accused Products
Abstract
An image capture device, pixel, and method of determining a focus setting for an image capture device are described. The image capture device includes an imaging area and a pixel readout circuit. The imaging area includes a plurality of pixels. The plurality of pixels includes multiple pixels in which each pixel of the multiple pixels includes a two-dimensional array of photodetectors and a microlens. Each photodetector in the array of photodetectors for a pixel is electrically isolated from each other photodetector in the array of photodetectors. A microlens is disposed over the array of photodetectors for the pixel. The pixel readout circuit includes, per pixel, a shared readout circuit associated with the array of photodetectors for the pixel and a set of charge transfer transistors. Each charge transfer transistor is operable to connect a photodetector in the array of photodetectors to the shared readout circuit.
275 Citations
20 Claims
-
1. An image capture device, comprising:
-
an imaging area comprising a plurality of color-filtered pixels arranged in Bayer pattern rows and Bayer pattern columns, wherein; each color-filtered pixel comprises a two-dimensional array of photodetectors; each photodetector in an array of photodetectors is electrically isolated from each other photodetector in the array of photodetectors; and a different microlens is disposed over each array of photodetectors; a pixel readout circuit comprising, for each color-filtered pixel; a shared readout circuit associated with the array of photodetectors for the color-filtered pixel; and a set of charge transfer transistors, each charge transfer transistor operable to connect a photodetector in the array of photodetectors to the shared readout circuit; and a processor configured to; operate the sets of charge transfer transistors for the color-filtered pixels in a first Bayer pattern row to detect a first phase difference in a first set of edges of an image; and operate the sets of charge transfer transistors for the color-filtered pixels in a second Bayer pattern row to detect a second phase difference in a second set of edges of the image, the first set of edges orthogonal to the second set of edges. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. An image capture device, comprising:
-
an imaging area comprising a plurality of color-filtered pixels arranged in Bayer pattern rows and Bayer pattern columns, wherein; each color-filtered pixel comprises a two-dimensional array of photodetectors; each photodetector in an array of photodetectors is electrically isolated from each other photodetector in the array of photodetectors; and a different microlens is disposed over each array of photodetectors; a pixel readout circuit comprising, for each color-filtered pixel; a shared readout circuit associated with the array of photodetectors for the color-filtered pixel; and a set of charge transfer transistors, each charge transfer transistor operable to connect a photodetector in the array of photodetectors to the shared readout circuit; and a processor configured to; operate the sets of charge transfer transistors for the color-filtered pixels in a first Bayer pattern column to detect a first phase difference in a first set of edges of an image; and operate the sets of charge transfer transistors for the color-filtered pixels in a second Bayer pattern column to detect a second phase difference in a second set of edges of the image, the first set of edges orthogonal to the second set of edges. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. An image capture device, comprising:
-
an imaging area comprising a plurality of color-filtered pixels arranged in Bayer pattern rows and Bayer pattern columns, wherein; each color-filtered pixel comprises a two-dimensional array of photodetectors; each photodetector in an array of photodetectors is electrically isolated from each other photodetector in the array of photodetectors; and a different microlens is disposed over each array of photodetectors; a pixel readout circuit comprising, for each color-filtered pixel; a shared readout circuit associated with the array of photodetectors for the color-filtered pixel; and a set of charge transfer transistors, each charge transfer transistor operable to connect a photodetector in the array of photodetectors to the shared readout circuit; and a processor configured to; operate the sets of charge transfer transistors for a first set of color-filtered pixels in a first Bayer pattern column to detect a first phase difference in a first set of edges of an image; operate the sets of charge transfer transistors for a second set of color-filtered pixels in the first Bayer pattern column to detect a second phase difference in a second set of edges of the image, the first set of edges orthogonal to the second set of edges; operate the sets of charge transfer transistors for a third set of color-filtered pixels in a second Bayer pattern column to detect the first phase difference in the first set of edges of the image; and operate the sets of charge transfer transistors for a fourth set of color-filtered pixels in the second Bayer pattern column to detect the second phase difference in the second set of edges of the image. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification