Title :
100000-pixel, 120-dB imager in TFA technology
Author :
Lulé, Tarek ; Wagner, Michael ; Verhoeven, Marcus ; Keller, Holger ; Böhm, Markus
Author_Institution :
Silicon Vision GmbH, Siegen, Germany
fDate :
5/1/2000 12:00:00 AM
Abstract :
A locally autoadaptive image sensor LARS II (Lokal-AutoadaptiveR Sensor) with 368/spl times/256 pixels was designed and fabricated in thin film on ASIC (TFA) technology. Every pixel contains an automatic shutter, made of 17 transistors and two capacitors on an area of 40/spl times/38.3 /spl mu/m/sup 2/, that adapts the integration time to the local intensity. This allows the capture and processing of scenes with extremely high dynamic range. For the amorphous detector system, local contrast and temperature stability are demonstrated to be excellent while the transient response is sufficient for imaging applications. Sample images shown in this paper verify the total dynamic range of 120 dB.
Keywords :
CMOS image sensors; adaptive systems; amorphous semiconductors; application specific integrated circuits; circuit stability; semiconductor thin films; silicon; smart pixels; thin film devices; transient response; 0.8 micron; 100000 pixel; 256 pixel; 368 pixel; 5 V; CMOS process; LARS II; Lokal-AutoadaptiveR Sensor; Si:H; amorphous detector system; automatic shutter; high dynamic range; integration time; local contrast; local intensity; locally autoadaptive image sensor; temperature stability; thin film on ASIC technology; transient response; Amorphous materials; Application specific integrated circuits; Capacitors; Detectors; Dynamic range; Image sensors; Layout; Pixel; Temperature; Thin film sensors;
Journal_Title :
Solid-State Circuits, IEEE Journal of
