Dynamic range extension of an active pixel sensor by combining output signals from photodiodes with different sensitivities

Jae-Sung Kong; Sung-Hyun Jo; Kyung-Hwa Choi; Sang-Ho Seo; Pyung Choi; Jang-Kyoo Shin

doi:10.1117/12.847994

25 January 2010 Dynamic range extension of an active pixel sensor by combining output signals from photodiodes with different sensitivities

Jae-Sung Kong, Sung-Hyun Jo, Kyung-Hwa Choi, Sang-Ho Seo, Pyung Choi, Jang-Kyoo Shin

Author Affiliations +

Proceedings Volume 7536, Sensors, Cameras, and Systems for Industrial/Scientific Applications XI; 75360T (2010) https://doi.org/10.1117/12.847994
Event: IS&T/SPIE Electronic Imaging, 2010, San Jose, California, United States

Abstract

A dynamic range (DR) extension technique based on a 3-transistor (3-Tr.) active pixel sensor (APS) and dual image sampling has been proposed. The feature of the proposed APS was that the APS used two photodiodes with different sensitivities, a high-sensitivity photodiode and a low-sensitivity photodiode. Operation of the proposed APS was simulated by using a 128×128 pixel array. Compared with previously proposed wide DR (WDR) APS, the proposed approach has several advantages; no-external equipments or signal processing for combining images, no-additional timerequirement for additional charge accumulation, adjustable DR extension and no temporal disparity.

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Jae-Sung Kong, Sung-Hyun Jo, Kyung-Hwa Choi, Sang-Ho Seo, Pyung Choi, and Jang-Kyoo Shin "Dynamic range extension of an active pixel sensor by combining output signals from photodiodes with different sensitivities", Proc. SPIE 7536, Sensors, Cameras, and Systems for Industrial/Scientific Applications XI, 75360T (25 January 2010); https://doi.org/10.1117/12.847994

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