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Performance Considerations for Automotive High Dynamic Range Image Sensors

Event: AutoSens Brussels
| Published: 5th October 2023
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Hear from:

Tomas Geurts
Sr. R&D Director, Europe,

OMNIVISION

The presentation focuses on the evolving landscape of image sensor technology for automotive applications, driven by the need for High Dynamic Range (HDR) and LED Flicker Mitigation (LFM) while maintaining smaller pixel sizes for enhanced spatial resolution. A notable solution that has emerged is the adoption of Lateral Overflow Integrating Capacitor (LOFIC) Pixels by major automotive image sensor suppliers. The implementation of LOFIC-based sensors requires careful consideration of design trade-offs to optimize Image Quality (IQ). Key challenges include maintaining Signal-to-Noise Ratio (SNR) at elevated temperatures and addressing the increasing demand for higher IQ with shrinking pixel dimensions. The presentation discusses the trade-offs between different pixel approaches, such as the Split-Diode Pixel and the single PD LOFIC, examining their impact on low-light performance, SNR, and color reproduction. By discussing these trade-offs and the presentation aims to show that the optimal solution shifts towards single PD LOFIC as the pixel sizes shrink and provides more insights into the advancements and considerations in automotive image sensor technology.

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