many newer Technologies really try to push the boundaries of what can be done
and bring the world something that it's never seen before but sometimes some of
the most useful stuff can just be a rehash of something that's actually very
old sometimes thousands of years old as
is the case with electronic ink although we've had paper and ink for a millennia
and can read just about anything we want on smartphones or tablets e-readers that
use electronic ink or e in instead of fully-fledged LCD screens are a very
popular choice but Luke why do people
even buy these things I mean your Android or iOS device can display ebooks
just fine so what's the point well to understand the advantages eink devices
have it helps to know a little bit about how they work a standard black and white
eink display is made up of millions of very small spheres called micro capsules
and are filled with black and white particles of pigment suspended in a
fluid white particles carry a positive electrical charge while black ones carry
a negative charge when you want to display something like that copy of 50
Shades that you only read after everyone's gone to bed your e-reader
applies different electrical fields to each micro capsule which in turn makes
either the white or black particles rise to the top creating text or an image
e-readers can also apply different charges to different sides of a single
micro capsu giving capsules a half white half black
or gray appearance which can be very useful in increasing resolution by
giving the edges to letters and other objects a smoother look the nice thing
about this ink suspended and goop system is that once the ink is pushed to the
top it stays there without needing any kind of power input the display only
draws power when you have to change something on the screen such as going to
the next page because simply leaving a page on the screen while you're reading
it uses no power on unlike an LCD display battery life for e-readers is
often measured in like days or even weeks instead of hours the downside to
this of course is just like with real paper you'll need some sort of external
light so you can actually read what's on the page some e-readers like the popular
Amazon Kindle paper white have included built-in LED lights for reading after
dark which works with a light guide to direct light evenly across the screen so
that it's easy for your eyes and convenient but also harder on your
battery even so the need for a light source is a worthwhile trade-off for
people who want easy portability less eye strain than a typical LCD screen and
the same awesome viewing angles you'd get from a gas station paperback and if
you want to do more than just read in black and white there's even color e in
technology that uses other color pigment particles and additional electrodes or
color filters on top of the display though it hasn't achieved widespread
adoption in in the consumer market yet thanks to its ability to hold images for
a long time without using electricity electronic ink is starting to find its
application in other things other than just e-readers even flash drives with
external eink displays that uh are able to display how much capacity is still
left inside iink SmartWatches that don't need to be charged nearly as often as an
Apple Watch or say Galaxy Gear there are lots of cool Concepts that may become a
reality as well such as e in credit cards that show your balance on the card
in real time and even large scale displays that can even change the
appearance of walls or Furniture pretty cool maybe one day you'll have an
electronic ink couch that can display scenes from your favorite Comics but
quickly switch off when it's time to bring a date
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