Method for expanding dynamic range of time-delay integration-complementary metal oxide semiconductor (TDI-CMOS) image sensor
An image sensor and dynamic range technology, applied in image communication, color TV components, TV system components, etc., can solve problems such as high storage capacity, frame rate reduction, and complex structure
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[0018] In order to improve the dynamic range of the TDI-CMOS image sensor and overcome the deficiencies of the existing technologies, such as the complex structure and large noise of multiple exposures in the pixel, the high storage capacity of multiple exposures outside the chip, and the reduced frame rate, this paper The invention proposes a method for adjusting the exposure time of pixels in different rows to realize the dynamic range of the TDI-CMOS image sensor. By resetting the pixels during the pixel exposure period to change the effective exposure time of the pixels, some of the pixels in each row have a long exposure to the object, and some have a short exposure to the object, and these long exposure and short exposure signals are in the accumulator inside the chip The accumulation in the sensor is equivalent to the fusion operation. The image restored by the output signal of the accumulator will well retain the information of the strong light and low light components,...
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