WORKSHOP PAPER
Real-time Crosstalk Mitigation Method Using On-Chip ISP in iToF System
Daeho Kim1, Hogyun Kim, Minsik Kim, Seong-Won Jo, Sangil Lee, Taemin An, Jaewon Choi, Jaeil An, Yundong Chang, Sunhwa Lee, Amit Eisenberg, Zviel Halachmi, Yaron Ukrainitz, Eli Balta, Omri Amrani, Chen Rimoch, Taeer Weiss, Shai Shamir, Maya Vishnevsky, Yonathan Munwes, Il-Pyeong Hwang, Youngkyun Jeong, Juhyun Ko, Jesuk Lee
1System LSI Division, Samsung Electronics Co., Ltd., Hwaseong, Gyeonggi-do, Korea

Abstract

We propose a real-time crosstalk mitigation method for iToF system by using on-chip ISP. We design the crosstalk mitigation block on the on-chip ISP to mitigate the crosstalk signal caused by a device cover glass. By considering temperature drift and exposure time of the sensor, the crosstalk is mitigated effectively in real time up to the frame rate of 30 fps. This paper also introduces a simple method of the crosstalk-pattern acquisition in the limited space.
Year: 2025
Workshop: IISW
URL: https://doi.org/10.60928/t9tl-slu8
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Keywords

iToF system, crosstalk mitigation, on-chip ISP, sensor, image signal processor, device cover glass,

References

1) C. Bamji et al., "A review of indirect time-of-flight technologies", IEEE Trans. Electron Devices, 2022. https://doi.org/10.1109/ted.2022.3145762
2) STMicroelectronics, "VL53L0X ranging module cover window guidelines", AN4907 application note, 2020
3) J. Park et al., "An indirect time-of-flight CMOS image sensor achieving sub-ms motion lagging and 60fps depth image from on-chip ISP", Proc. IEEE Symp. VLSI Technol. Circuits, 2023. https://doi.org/10.23919/vlsitechnologyandcir57934.2023.10185418
4) M. S. Keel et al., "Wiggling error self-calibration for indirect ToF image sensors", Proc. IISW, 2021