Comment by zinekeller
4 years ago
> You can "sense" with a lot more resolution if you use a camera and light bulb.
(Visible) Light has a frequency of around 400-790 THz, which explains why it has a inherently better resolution.
4 years ago
> You can "sense" with a lot more resolution if you use a camera and light bulb.
(Visible) Light has a frequency of around 400-790 THz, which explains why it has a inherently better resolution.
https://www.rtinsights.com/li-fi-a-new-wireless-alternative-...
> Li-Fi connections are broadcast over the air through a light-emitting diodes (LED) broadcaster and support rates up to 100Gbit/s ... Li-Fi can also serve to identify an object’s indoor position more accurately than Wi-Fi or GPS used today (less than 2cm and less than 3 degrees of orientation while it is providing real-time localization (less than 34ms). This accuracy is vital in multiple applications such as navigation In-Door Robots and Drones, Virtual Reality (VR), Augmented Reality (AR), and Gaming, among others ... it cannot go through walls, and thus a private local area network (LAN) can be created by lighting up a closed room ... Any organization that needs to keep information within the four walls, such as military bases and banks, can use the technology to keep data restricted to a single room.
There's potential for visible-light networking but the Li-Fi people in particular are complete garbage. They claim visible light travels faster than radio waves and say Li-Fi is a hundred times faster than wi-fi but their thousand dollar router can only do 100Mb/s. They also rip off the Wi-Fi Alliance logo.
Which Li-fi people? AFAICT there are several groups, and li-fi.co (which I'll assume you're talking about) is less advertising for one specific group, and more advocating for the technology as a whole.
> They claim visible light travels faster than radio waves
I wasn't able to find it on the lifi website but seems like some poor copywriter got something wrong
> their thousand dollar router can only do 100Mb/s
Who's they? In any case, since lifi.co is advocating Li-Fi as a whole so it makes sense they talk about theoretical speeds, whereas a specific router from some manufacturer might not be able to reach those speeds, considering how new the technology is
In the end, I imagine Li-Fi doesn't have much of a future outside of niche markets because it has to compete with wifi which is everywhere (and it can't supplant wifi because e.g. it doesn't work in your pocket)
1 reply →
That's disappointing, sounds like they need competition.
Oh, I have been dreaming about LiFi for some time, if what you're saying it's true, that's... disappointing. Do you have any sources about the current state of (real-world) LiFi ?
4 replies →
Yep!