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A 240x180 120dB 10mW 12us‐latency sparse output vision sensor for mobile applications


Berner, Raphael; Brandli, Christian; Yang, Minhao; Liu, Shih-Chii; Delbruck, Tobi (2013). A 240x180 120dB 10mW 12us‐latency sparse output vision sensor for mobile applications. In: Intl. Image Sensors Workshop, Snowbird Resort, UT, USA, 12 June 2013 - 16 June 2013, 1-4.

Abstract

This paper proposes a CMOS vision sensor that combines event-driven asynchronous readout of temporal contrast with synchronous frame-based active pixel sensor (APS) readout of intensity. The image frames can be used for scene content analysis and the temporal contrast events can be used to track fast moving objects, to adjust the frame rate, or to guide a region of interest readout. Therefore the sensor is suitable for mobile applications because it allows low latency at low data rate and low system-level power consumption. Sharing the photodiode for both readout types allows a compact pixel design that is 60% smaller than a comparable design. The 240x180 sensor has a power consumption of 10mW. It is built in 0.18um technology with 18.5um pixels. The temporal contrast pathway has a minimum latency of 12us, a dynamic range of 120dB, 12% contrast detection threshold and 3.5% contrast matching. The APS readout has 55dB dynamic range with 1% FPN.

Abstract

This paper proposes a CMOS vision sensor that combines event-driven asynchronous readout of temporal contrast with synchronous frame-based active pixel sensor (APS) readout of intensity. The image frames can be used for scene content analysis and the temporal contrast events can be used to track fast moving objects, to adjust the frame rate, or to guide a region of interest readout. Therefore the sensor is suitable for mobile applications because it allows low latency at low data rate and low system-level power consumption. Sharing the photodiode for both readout types allows a compact pixel design that is 60% smaller than a comparable design. The 240x180 sensor has a power consumption of 10mW. It is built in 0.18um technology with 18.5um pixels. The temporal contrast pathway has a minimum latency of 12us, a dynamic range of 120dB, 12% contrast detection threshold and 3.5% contrast matching. The APS readout has 55dB dynamic range with 1% FPN.

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Additional indexing

Item Type:Conference or Workshop Item (Speech), refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Neuroinformatics
Dewey Decimal Classification:570 Life sciences; biology
Language:English
Event End Date:16 June 2013
Deposited On:12 Feb 2014 17:06
Last Modified:05 Apr 2016 17:33
Publisher:Proceedings of the International image sensor workshop 2013
Series Name:IISW 2013
Official URL:http://www.imagesensors.org/

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