Title :
Smart spatial light modulators using liquid crystals on silicon
Author :
Johnson, Kristina M. ; Mcknight, Douglas J. ; Underwood, Ian
Author_Institution :
Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA
fDate :
2/1/1993 12:00:00 AM
Abstract :
Smart pixels are discussed in terms of the following neurally inspired functions: memory, sensors, intrapixel circuitry, interpixel communication, and optical outputs. The types of liquid crystals and electronic circuits used in VLSI/liquid crystal arrays, and their electrooptic properties are reviewed. Examples of electrically addressed and optically addressed liquid crystal smart pixels, and results from a 128×128 VLSI/FLC SLM are presented. This device has a response time of 150 μs, a contrast ratio of 8:1 measured on a row containing more than 50 pixels, and a frame rate of 4.7 kHz. Improvements of these devices are discussed in terms of what the silicon technology can yield in the future. A few examples in which the liquid crystal on silicon technology has been applied are presented
Keywords :
VLSI; electro-optical devices; ferroelectric liquid crystals; integrated optoelectronics; liquid crystal devices; optical neural nets; reviews; spatial light modulators; 128 by 128; 128×128 VLSI/FLC SLM; 150 mus; Si; VLSI/liquid crystal arrays; contrast ratio; electrically addressed; electronic circuits; electrooptic properties; frame rate; interpixel communication; intrapixel circuitry; liquid crystals; memory; neurally inspired functions; optical outputs; optically addressed; response time; sensors; smart pixels; smart spatial light modulators; Delay; Electronic circuits; Intelligent sensors; Liquid crystal on silicon; Liquid crystals; Optical modulation; Optical sensors; Smart pixels; Time measurement; Very large scale integration;
Journal_Title :
Quantum Electronics, IEEE Journal of
