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Energy-saving Light Emitting Diodes (LEDs) could help meet demand for wireless communications without affecting the quality of light or environmental benefits they deliver, new research funded by the Engineering and Physical Sciences Research Council (EPSRC) has shown.
A University of Edinburgh team has found that transmitting digital data via LEDs at the same time as using them to generate light does not make the light dimmer or change its colour. Nor does it make the LED more energy-hungry. Dr Wasiu Popoola of the University of Edinburgh, who led the research, says these concerns have held back the more widespread adoption of Light Fidelity, or LiFi, which uses household LEDs to enable data transfer.
But these findings help eliminate key hurdles to using LEDs to help satisfy the increasing global thirst for wireless communications. Preserving the quality of lighting is, in particular, a vital consideration as it can have a major effect on the physical and mental wellbeing of people in both their homes and their workplaces. LEDs have secured a huge increase in their share of the worldwide lighting market in recent years, as well as being used extensively in TV and other displays.
Uh huh. That's the same technology they use to keep the rest of you from seeing what I see.
(Score: 1) by anubi on Friday October 13 2017, @09:11AM (2 children)
Just thinking about what I just typed... should I try that today, I think I would be sending up entire HTML pages and loading them into the browser.
But the main problem is the way our browsers are coded these days, this technique would be ripe for malware.
TCP not involved. Just a streaming transfer of HTML and image files for a page to be displayed using high speed manchester or QAM. The links in page would be active, as the browser would be invoked pointing to a file:/// . If its not online, the links are dead, but you still get the page text and images. Just have a standard place this particular app stores the incoming stream of files, and when it gets 'em all, invokes the browser. That way no one has to have connection to the internet to make this thing work.
At LED speeds in the MHz, I would imagine I should be able to transfer the whole page with images in less than a second.
The filesets could be saved off for later viewing much like saving photos.
I think this would be a boon for merchants' display windows and cases... interested passerby can get a lot more info on the featured item.
"Prove all things; hold fast that which is good." [KJV: I Thessalonians 5:21]
(Score: 3, Interesting) by GreatAuntAnesthesia on Friday October 13 2017, @09:38AM
The unidirectional nature of it makes me think of the old teletext systems we used to have on TV.
(Score: 0) by Anonymous Coward on Friday October 13 2017, @03:50PM
so like you mean ti display test via a udp stream or something like that using a broadcast?
isn't that what that was designed for originally? it doesnt have to be tcp or html. it can be text in an icmp payload for all that it matters.