Li-Fi the New
transmission media ahead of Wi-Fi and Wi-Max
This post
introduces to a new technology which can be used to transfer data by using
light, Google Already ahead in this type of connection in USA which usually
gives 1 Gbps speed.
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Till now LED’s were
considered just as an illuminating device but this July HERALD HAAS, a
professor of engineering at Edinburgh university discovered how led’ s can
serve wireless transmitting data access point. From any led source available
like led bulbs, street lamps or any lightning object can be used for
communication.
Just think the
speed of light = 299 792 458 m / s
What if the rate of
data communication has the same value i.e. transmit data at the speed of the
light? Well what i think that it will be simply described in one word that is
“amazing”. Haas has done it. According to him communication is possible using
the principle of orthogonal frequency-division multiplexing which is used in 4G
also. In this the digital data is encoded on multiple carrier signals.
Various intensities
of light transfer different signals. It is just like working on Morse code
using a torch or a light source (here the light source is led). Led’s are used
to transmit data in a rapid stream of binary code which are invisible to the
naked eye, can then be detected by a light-sensitive receiver.
Although our very
own Wi-Fi transmits data through radio waves which work on small fraction of
electromagnetic spectrum. The bandwidth is low and we all have faced this
problem. In college hostels, coffee shops the limited bandwidth spoils our
entire mood’ when the number of people transmitting data increases and our
speed starts decreasing. Similarly 3G, where the system is getting increasingly
congested thereby turning from a high speed transmitting data scheme to a
silkworm speed accessing method.
With this
technology accessing or transmitting data in aircrafts, where radio waves could
be a bit dangerous this technology will come into aid, it is of great use in
underwater oil rigs where communication through radio waves is not possible.
The interference level of this technology is low. It can lead up to speeds as
high as 100 MB per second.
Although this
technology sounds like a replacement to Wi-Fi but this high speed data transferring
technology also has some limitations that is the inability of light to pass
through obstacles. It cannot pass through walls and can be blocked. If the
light signal is blocked, we can seamlessly switch back over to radio waves
(Wi-Fi).
Now when we have to
transmit data we got both light and radio waves to use accordingly as per the
environment around us. The conclusion is that there is no dead end when it
comes to technology, science always shows the path.
The new
portable keyboard that produces laser projection and motion detection
technologies, your excellent companion for tablets and laptops. That small
device can be quite amazing and practical. Connect this gadget via Bluetooth
for your iPhone, iPad tablet or any other Android gadgets, you can even utilize
it for Windows or even Mac OS computer via USB-connection. Celluon Magic Cube
Laser Projection Keyboard and Touch-pad operates as much as two hours constantly
whenever wireless, you may recharge this again via wired USB.
The actual eyeglasses may include a low-resolution digital
camera within the front side with regard to collecting info in order to relay
to some compact display constructed into 1 side of the lens. The eyeglasses may
allegedly function just like a wearable model from the Google Goggles app,
offering real-time info on the user’s location by GPS and also movement
sensors. The actual digital camera may also be in a position to get photos, and
also have the integrated flash. The display will never be transparent, but
actually will become situated on the side from the frame, in order to not ever
obscure a person’s view but offer a increased reality feel.
Wireless electricity has finally
shown the result I Nokia’s latest Lumia 920 phone, which is facilitate with
Wireless charging. This concept was brought to light by 19th century physicist
Nikola Tesla, who completely dedicated his life to. Now in 2007, US physicist
Marin Soljacic from MIT finally brought out the result by experimenting,
wireless electricity from electromagnet and resonance. The first success was
shown by him when his team WiTricity Corp powered a 60 Watt bulb from the power
source 7 feet away from the and all the wires too. After this in 2009 Intel has
also started showcase working project with the Team of MIT’s scientist. They
have found out the system that can transfer the electricity from distance of 1
m all with 80% efficiency.
This would be amazing technology when
will be in real life, well in 2008 researchers team at University of Arizona
developed a 3D display that can produce the real time display at the Refresh
rate of 2 second. After that great achievement made and this was reached at 15
frames per second now. They are confined that in next few years, these Displays
can be shown up-to 24 frames per second.
The much known Dr Stepehn Badylak, a
tissue culture expert have lots of patent on his name, and one of the most
amazing I like is the extracellular matrix for tissue regeneration. This
research is having the details that steam cell can have all the information
from existing cells and develop the more tissue with it.
Recently Research department of us
defense ministry have found out the result to protect Army vehicle from the
fires and similar interruption. According to this result, scientist claims that
it is possible to add some super capacitor vehicle to the military vehicle
which can quickly dump the stored energy to the upcoming fires or attacks. This
principle is based on electromagnetism; army vehicle will produce high electro
magnetism which can repel the fires. It will be lasting for few milliseconds
only but once timing is calibrated it can be great to deflect the projectiles.
Many technology lovers from a long
time had this dream to have flexible screens for their mobile devices, and this
dream is finally showing the result. Recently SONY has launched the flexible
organic screens that are capable of folding and it can bend up to radius of 5mm
and can give the Sharpe image of 1200x1600 pixels. Before this, in 2008
Flexible Display Center in Arizona State had shown the prototype of such
display. 
