Samsung Electronics Co., Ltd.

Jin-Kyeong Heo

Tae-Chan Kim

Seog-Heon Ham

Hyeok Jong Lee

Se-jun Kim

Su-Hun Lim

Yong-in Han

Myoung-Su Lee

Tomotasu Tate

Disclosed are an image sensor having a light-emitting diode (LED) flicker mitigation function and an image processing system including the image sensor. The image processing system includes an image sensor including a plurality of pixels, the plurality of pixels configured to respectively generate pixel signals corresponding to photocharges, and configured to perform analog-to-digital conversion (ADC) on the pixel signals to generate digital pixel signals; and an image signal processor configured to process the digital pixel signals to generate image data. The image sensor operates in a first operating mode in a situation in which a light-emitting diode (LED) light is provided, and operates in a second operating mode in a general situation in which the LED light is not provided.

Image sensor having LED flicker mitigation function and image processing system including the image sensor

An apparatus for canceling a fixed pattern noise in a CMOS image sensor includes a storage device, a fixed pattern noise operation circuit, and a fixed pattern noise canceling circuit. The storage device stores first reference fixed pattern noises operated in a vertical blank section of an (n&#x2212;1)th frame. The fixed pattern noise operation circuit calculates second reference fixed pattern noises based on the first reference fixed pattern noises stored in the storage device and blank fixed pattern noises output in a vertical blank section of an n-th frame and outputs the second reference fixed pattern noises to the storage device to update the first reference fixed pattern noises to the second reference fixed pattern noises. The fixed pattern noise canceling circuit cancels active fixed pattern noises in combination signals based on the combination signals output in an active section of an (n+1)th frame and including the active fixed pattern noises and pixel signals and the second reference fixed pattern noises output from the storage device.

Method and apparatus for canceling fixed pattern noise in CMOS image sensor

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Hwaseong-si, South Korea

Jin-Kyeong Heo