Specifications of Smartphones - Size, Resolution and Protection

SCREEN SIZE        

The industry standard way of representing display sizes is publishing their length in inches. 

The screen-to-body ratio is a measure which relates to the size of the screen bezels. 
The BIGGER the ratio, the SMALLER the bezels are, meaning the DISPLAY takes up a larger area on the device's front.
Having a smartphone said to be 5 inchs doesn't necessarily mean you have a full 5inch screen for usuage

The Display to body ratio is a simple data that tells you how much of the surface the screen represents when compared to the whole device. 

For example, a device with a ratio of 50% would have as much body surface visible from the front as it has screen surface.

On the other hand, a device with a 100 ratio would have no visible body when looked at from the front.

Calculate the screen size. Enter your smartphone details:

SCREEN RESOLUTION

The industry standard way of representing screen resolution is publishing the number of pixels that form the two sides of the display rectangle. 
Usually, the display side that sits at the bottom when you hold the device in your hand is cited first. 
For the older alphanumeric displays the screen resolution is shown in screen lines or characters per screen line instead. In this case since there will be more pixels per an inch-long line of pixels on the smaller display, the image will look subjectively clearer and more detailed. 
The pixel density which is measured in pixels-per-inch (ppi) is very important.

An increased pixel density allows for more detail to be shown. 
Displays with a higher pixel density will give clearer and sharper images.

When choosing your next smartphone, it’s important to look at the pixel density on the display. 

A smartphone with low pixel density may give poor-quality images. 

Text legibility will also be limited – particularly on webpages where text is small. 

On smartphones with a higher pixel density, the legibility of text improves and further details can be seen in a photo or video. A high-end smartphone should have a pixel density of at least 300ppi.

However, a higher resolution uses more battery power and more processing power.

Calculating PPI  or you can simply install CPU-Z and check the Device tab

resolution definitions

Resolution Definitions are also often referred to by the smaller number of the pixel measurement. Eg:

1    1)    HD is sometimes called 720p,

2    2)    Full HD gets called 1,080p

3    3)    QHD is called 2K or 1,440p

4    4)    Ultra HD is called 4K  or 2,160p

HD

HD stands for high definition. HD simply means a pixel measurement of 1,280 x 720 pixels.

No matter how large the screen is, as long as the pixel measurement remains at this measurement, it's an HD display.

As you can probably tell, the smaller the HD screen the higher the pixel density and, theoretically, the better the picture.

So simply having an HD display doesn't mean much, as it will produce a very different image on a 5-inch screen from a 10-inch screen and a 4.3-inch screen.

Full HD

Full HD measures 1,920 x 1,280 pixels.

Again, the pixel density will depend on how large the screen diagonal is.

With smartphones at the 5-inch mark, the pixel density sits around 440 ppi, while on a 5.5-inch screen that number drops to 400 ppi.

Quad HD or 2K

QHD stands for Quad HD, which is four times the definition of standard HD.

The pixel measurement for QHD is 2,560 x 1,440 pixels.

A 5.5-inch QHD display has a pixel density of 538 ppi.

4K or Ultra HD

4K comes from the larger of the two pixel measurements. 4,096 pixels in 4K and only 3,840 pixels in Ultra HD.

Ultra HD is 3,860 x 2,160 pixels and 4K is 4,096 x 2,160. Both definitions frequently get shortened to 2,160p and the pixel difference is relatively marginal.

SCREEN PROTECTION

As touchscreen displays are growing larger in recent years, the need for enhanced scratch resistance and protection of the screens created the demand for usage of screen covers of increased resistance including chemically hardened glass.

Corning's Gorilla Glass is a popular brand of hardened glass used for high-end handset in the mobile industry.

Additionally, manufacturers has started applying oleophobic coating on top of its screens to make finger smudges less of an issue.











Credit: wikipedia, gsmarena, Androidpit

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