7.2 A 48 ×4013.5 mm Depth Resolution Flash LiDAR Sensor with In-Pixel Zoom Histogramming Time-to-Digital Converter
- Authors
- Kim, B.[Kim, B.]; Park, S.[Park, S.]; Chun, J.-H.[Chun, J.-H.]; Choi, J.[Choi, J.]; Kim, S.-J.[Kim, S.-J.]
- Issue Date
- 2021
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Citation
- Digest of Technical Papers - IEEE International Solid-State Circuits Conference, v.64, pp.108 - 110
- Indexed
- SCOPUS
- Journal Title
- Digest of Technical Papers - IEEE International Solid-State Circuits Conference
- Volume
- 64
- Start Page
- 108
- End Page
- 110
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/1649
- DOI
- 10.1109/ISSCC42613.2021.9366022
- ISSN
- 0193-6530
- Abstract
- 3D imaging technologies have become prevalent for diverse applications such as user identification, interactive user interfaces with AR/VR devices, and self-driving cars. Direct time-of-flight (D-ToF) systems, LiDAR sensors, are desirable for long-distance measurements in outdoor environments because they offer high sensitivity to weak reflected light and high immunity to background light thanks to the spatiotemporal correlation of SPADs [1], [2]. SPAD-based LiDAR sensors suffer from a large amount of ToF data generated by complicated time-to-digital converters (TDC), resulting in limited spatial resolution and frame rate compared with indirect ToF (I-ToF) sensors. Recently, LiDAR sensors embedding histogramming TDCs have been reported to generate depth information to reduce the required output bandwidth [3]-[6]. However, they still adopt a large number of memories in pixel, a complicated signal processor, or a column-parallel TDC scheme with scanning optics. © 2021 IEEE.
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