Basem Shihada, an associate professor of Computer Science at the King Abdullah University of Sciences and Technology (KAUST), had been exploring data encoding into an artificial light source when he wondered if the same could be done with sunshine.
The devised system comprises two parts - a light modulator that can be embedded in a glass surface and an in-room receiver.
"The modulator is an array of our proposed smart glass elements known as Dual-cell Liquid Crystal Shutters ," Osama Amin, a research scientist in Shihada's labs, said. The liquid shutter array would require only one Watt of power to operate, its function being to encode signals into the light as it passes, acting like a filter. The power would be supplied using a small solar panel.
is imperceptible to the eye, eliminating the flicker problem," Ammar said. "The communication system works by changing the polarization of the incoming sunlight at the modulator side. The receiver can detect this change to decode the transmitted data." According to the team, the designed setup can transmit data at 16 kilobits per second. "We are now ordering the necessary hardware for a testbed prototype implementation. We would like to increase the data rates from kilobits to mega- and gigabits per second," Shihada added.Solar energy is widely used for electricity generation, heating systems, and indoor environment daytime illumination. Indeed, large amounts of sunlight energy remain insufficiently used.
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