Dynamic-Range Widening in a CMOS Image Sensor Through Exposure Control Over a Dual-Photodiode Pixel

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In this paper, we propose a technique for automatic-exposure control and synthesis for a wide-dynamic-range sensor based on dual-exposure method. Using the proposed technique, a sensor can adaptively adjust its exposure to widely varying illumination conditions and consequently accomplish an infinite dynamic range in theory. An artificial test bench consisting of a virtual illumination source and its imaging system is introduced to verify the performance of the proposed technique. Simulations show how a wider dynamic range can be achieved by the proposed technique. It is also shown that a VGA-resolution CMOS image sensor developed based on the proposed technique can support up to a 119-dB dynamic range.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2009-12
Language
English
Article Type
Article
Keywords

ADC

Citation

IEEE TRANSACTIONS ON ELECTRON DEVICES, v.56, no.12, pp.3000 - 3008

ISSN
0018-9383
DOI
10.1109/TED.2009.2033327
URI
http://hdl.handle.net/10203/99256
Appears in Collection
EE-Journal Papers(저널논문)
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