Smart spatial light modulators using liquid crystals on silicon
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 mu s, 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.
- Publication:
-
IEEE Journal of Quantum Electronics
- Pub Date:
- February 1993
- DOI:
- Bibcode:
- 1993IJQE...29..699J
- Keywords:
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- Light Modulation;
- Liquid Crystals;
- Modulators;
- Optical Data Processing;
- Optoelectronic Devices;
- Pixels;
- Very Large Scale Integration;
- Arrays;
- Silicon;
- Optics;
- Optical modulation;
- Liquid crystal on silicon;
- Liquid crystals;
- Optical sensors;
- Smart pixels;
- Very large scale integration;
- Intelligent sensors;
- Electronic circuits;
- Delay;
- Time measurement