A cmos image sensor and signal transmission method thereof

Abstract

The invention discloses a full-frame CMOS image sensor, which comprises: a plurality of effective pixels, each of which includes an imaging pixel array; a readout circuit for performing pixel analog signal amplification and analog-to-digital conversion, which includes a plurality of readout sub-circuits , corresponding to each column configuration of the imaging pixel array; the transmission module, including multiple transmission channels; the interface circuit, including multiple interface sub-circuits; the first control unit, controlling the exposure and signal sampling of each imaging pixel, and sequentially selecting each row of effective pixels , and control the analog signals of effective pixels in the selected row to be output to each readout sub-circuit at the same time; the second control unit makes each transmission channel of the transmission module transmit digital signals of a plurality of effective pixels in sequence and transmit multiple digital signals each time The channels are transmitted in parallel, and each interface sub-circuit is controlled to output multiple digital signals to the outside in sequence, and the multiple interface sub-circuits output in parallel for each output. The invention can effectively improve the frame rate of the CMOS image sensor.

Description

Technical field [0001] The invention relates to the field of image sensors, in particular to a CMOS image sensor and a signal transmission method thereof. Background technique [0002] The size of the traditional camera film is 35mm, 35mm is the width of the film (including the perforation part), and the photosensitive area of ​​the 35mm film is 36x 24mm. The size of the CMOS photosensitive imaging element of the SLR camera is the same as the size of the 135 film 36x24mm, which is called "full frame". Among SLR cameras, full-frame cameras are high-end cameras, such as Nikon D5, Sony Alpha 7RM2, Canon EOS 6D, etc., all use full-frame image sensors. Generally speaking, due to the large size of the full-frame sensor array, the pixel size under the same number of pixels is also large, so better image quality and color expression can be obtained. [0003] The camera's CMOS image sensor can use two exposure methods: rolling exposure (Rolling Shutter) and global exposure (Global Shutter...

AI Technical Summary

Problems solved by technology

This non-simultaneity is no problem for ordinary camera applications, but for full-frame cameras shooting images at high frame rates, it will cause obvious image distortion and deformation

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