The smallest visual element in an electric display or visual data file is a single "dot" known as a Pixel.
Most contemporary electric displays are collection
of a grid of pixels. Each pixel can be turned on or off or - in the case of
full-colour displays - reduced or made a definite colour. In this way, pixels are
independently controlled to make the whole display to show data and graphics.
Pixels per inch (PPI) or pixels
per centimetre (PPCM)
is a measurement of pixel density (resolution) of devices in many
frameworks: typically displays of computer , scanners of image, and sensors of
digital camera image. It can be defined as the horizontal or vertical
density (for square pixels) as those are the equal but the density on along the
diagonal is lower. Square pixels are the norms (else those densities would be diverse).
Smartphones use small displays, but today, smartphone displays have a larger PPI
rating, such as the Fujitsu F-02G with a quad HD display at 564 PPI, the LG G3 with quad HD display at 534
PPI or iPhone which is branded by Apple as a Retina display with maximum 401 PPI - XHDPI or Oppo Find 7 with 534 PPI on 5.5"
display - XXHDPI.
The PPI of a computer display is related to the size of the display in inches and the total number of pixels in the two basic directions i.e. Horizontal and
vertical. This type of measurement is frequently referred to as dots per inch, though these measurements actually refer to the
resolution of a computer printer
more accurately.
Check out the Phones and their PPI metric:
You may be thinking that does PPI
matter a lot while buying phones. Because some phone manufacturers boast a
higher PPI that can’t be seen with naked eyes. Your naked eyes can see PPI up
to 399. But if your smartphone is having PPI more than 399 it’s of no use.
Sometimes our friends boast that
my display is full HD, but it will matter only if your phone screen is 5.7 or
bigger. Because in that screen size, pixels become bigger and they are bigger.
But recently Sharp has developed
the display which will double the number of pixels. Check Out the recent
Technology developed by Sharp, which will blow your mind.