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Synchronous Driving Method for Stitching Pixel Arrays Based on an Adaptive Correction Technique.

Suiyang Liu1, Zhongjie Guo1, Xinqi Cheng1

  • 1Department of Electronic Engineering, Xi'an University of Technology, No. 5, Jinhua South Road, Xi'an 710048, China.

Sensors (Basel, Switzerland)
|March 28, 2024
PubMed
Summary
This summary is machine-generated.

This study addresses non-synchronized signals in large CMOS image sensors using stitching technology. A novel synchronous driving method ensures reliable, high-frame-rate imaging by detecting and correcting signal delays.

Keywords:
delay detectionrow drivingstitching CMOS image sensor

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Area of Science:

  • Electrical Engineering
  • Computer Engineering

Background:

  • Stitching technology in large-pixel-array CMOS image sensors exacerbates non-synchronized output signals from bilateral driver circuits.
  • Conventional clock tree synchronization is unsuitable for stitching technology, leading to DC perforation issues.

Purpose of the Study:

  • To analyze the causes of inconsistent output signals in bilateral driving circuits for stitching pixel arrays.
  • To propose and verify a novel synchronous driving method for large-pixel-array CMOS image sensors.

Main Methods:

  • Analysis of signal inconsistency in bilateral driver circuits.
  • Development of an on-chip output signal delay detection and calibration method.
  • Simulation of the proposed method on a 55 nm stitching process CMOS image sensor (77 mm × 84 mm).

Main Results:

  • The proposed method effectively detects and corrects non-synchrony in row driver output signals.
  • Simulations confirm the feasibility of the synchronous driving method.
  • The validated CMOS image sensor achieves a 150 M pixel array with a frame rate exceeding 10 FPS.

Conclusions:

  • The developed synchronous driving method is simple, reliable, and applicable to stitching pixel arrays.
  • This approach overcomes limitations of conventional synchronization techniques for large-format image sensors.
  • Enables high-performance imaging in large-pixel-array CMOS sensors utilizing stitching technology.