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Smart spatial light modulators using liquid crystals on silicon

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3 Author(s)
Johnson, Kristina M. ; Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA ; McKnight, D.J. ; Underwood, I.

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

Published in:

Quantum Electronics, IEEE Journal of  (Volume:29 ,  Issue: 2 )

Date of Publication:

Feb 1993

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