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US 9,432,605 B2Granted
Image sensor, operating method thereof, and system including same
AssigneeSamsung Electronics Co., Ltd.
InventorsMoo Young Kim, Tae Chan Kim, Jae Cheol Yun, Seog Heon Ham
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Abstract
A method of operating an image processing system includes storing differences between first analog pixel signals and second analog pixel signals and converting the stored differences to one-bit digital signals, the first analog pixel signals being output from a plurality of pixels and corresponding to a previous frame, and the second analog pixel signals being output from the plurality of pixels and corresponding to a current frame.
Claims30
A method of operating an image processing system comprising:
- storing differences between a plurality of first analog pixel signals and a plurality of second analog pixel signals at respective ones of a plurality of pixel signal difference storage circuits such that each of the plurality of pixel difference storage circuits stores a difference between a respective one of the plurality of first analog pixel signals and a respective one of the plurality of second analog pixel signals, the plurality of first analog pixel signals being output from a plurality of pixels and corresponding to a previous frame, the plurality of second analog pixel signals being output from the plurality of pixels and corresponding to a current frame;
- and
- converting each of the stored differences to respective one-bit digital signals.
An image sensor comprising:
- a pixel array including a plurality of pixels;
- a plurality of pixel signal difference storage circuits configured to store differences between respective ones of a plurality of first analog pixel signals and a respective one of a plurality of second analog pixel signals such that each of the plurality of pixel difference storage circuits stores a difference between a respective one of the plurality of first analog pixel signals and a respective one of the plurality of second analog pixel signals, the plurality of first analog pixel signals being output from the plurality of pixels and corresponding to a previous frame, and the plurality of second analog pixel signals being output from the plurality of pixels and corresponding to a current frame;
- and
- a plurality of analog-to-digital conversion circuits each configured to convert a respective one of the stored differences to a respective one of one-bit digital signals.
1 more element
An image processing system comprising:
- an image sensor including,
- a pixel array including a plurality of pixels;
- a plurality of pixel signal difference storage circuits configured to store differences between respective ones of a plurality of first analog pixel signals and respective ones of a plurality of second analog pixel signals such that each of the plurality of pixel difference storage circuits stores a difference between a respective one of the plurality of first analog pixel signals and a respective one of the plurality of second analog pixel signals, the plurality of first analog pixel signals being output from the plurality of pixels and corresponding to a previous frame, and the plurality of second analog pixel signals being output from the plurality of pixels and corresponding to a current frame;
- a plurality of analog-to-digital conversion circuits each configured to convert a respective one of the stored differences to respective one of one-bit digital signals, and
- a latch block configured to output image data based on the converted one-bit digital signals;
- and
- an image signal processor (ISP) configured to recognize motion of an object between the previous frame and the current frame by processing the image data output from the image sensor.
4 more elements
An image sensor comprising:
- at least one pixel;
- and
- at least one readout circuit, the readout circuit configured to output a one-bit digital signal indicating whether a difference between a respective one of first analog signals and a respective one of second analog signals is greater than a reference voltage, the first analog signals representing a first frame sensed by the pixel, and the second analog signals representing a second frame sensed by the pixel, the readout circuit including,
- a plurality of storage devices each configured to store a respective one of the differences between the respective one of the first analog signals and the respective one of the second analog signals, and
- an analog-to-digital converter configured to convert the stored difference to the one-bit digital signal.
2 more elements
Dependencies are inferred from the claim text.