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Ambient‐light sensor system with wide dynamic range enhanced by adaptive sensitivity control
Author(s) -
Park HyunSang,
Ji SeonBeom,
Han MinKoo,
Lee JaeSic,
Kim ChiWoo,
Choi KwangSoo
Publication year - 2009
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/jsid17.8.681
Subject(s) - sensitivity (control systems) , computer science , dynamic range , wide dynamic range , light intensity , process (computing) , high dynamic range , adaptation (eye) , optics , electronic engineering , computer vision , physics , engineering , operating system
— A new digital ambient‐light sensor system is presented which employs two linear light sensors with different sensitivities and automatically adjusts the sensitivity based on the illumination condition. The adaptation mechanism allows a very wide range of light intensity to be detected, and the input dynamic range of the system is substantially improved from 22.5 to 45.1 dB. The proposed method does not require any additional precision bits for output data. Due to the small number of the output bits and the simple conversion process, the system can be easily integrated on the display panel.