Pixels, Display Resolution

[PRATAP]

Dear Experts,

i am confused with Pixels & Display Resolution..

 

I bought few monitors and TV's during last 10 years without knowing the concept of Pixels & Resolution.

I was searching for this on web but still confused.

 

1. are pixels having dimensions? like "1mm square" or "2mm square" something like this?

2. is it possible to have 4K resolution in 20" TV 22" TV 24" TV 26" TV......................43" TV so on? if yes, in this case the size of the pixel varies?

[Frankenburger]

Pixel size is different from resolution. There's a metric that is used to measure pixel density, or how many pixels occupy an area, called Pixels Per Inch (or PPI for short).

 

For example, a 24" 4k screen has approximately 183.5 pixels per square inch. A 40" 4k screen has about 110 pixels per square inch.

 

Also, take into consideration that some phones have a 4k display at 5" or so. The Sony Xperia Z5 Premium is one such phone, with a PPI of 801. So yes, pixel sizes vary.

Edited June 27, 2018 by Frankenburger
Fixed the measurement

[Glenwing]

27 minutes ago, Frankenburger said:

Pixel size is different from resolution. There's a metric that is used to measure pixel density, or how many pixels occupy an area, called Pixels Per Inch (or PPI for short).

 

For example, a 24" 4k screen has approximately 183.5 pixels per square inch. A 40" 4k screen has about 110 pixels per square inch.

 

Also, take into consideration that some phones have a 4k display at 5" or so. The Sony Xperia Z5 Premium is one such phone, with a PPI of 801. So yes, pixel sizes vary.

Just a note; Pixel density is per length, not per area. It's 183.5 pixels per inch, not per square inch.

[Frankenburger]

3 minutes ago, Glenwing said:

Just a note; Pixel density is per length, not per area. It's 183.5 pixels per inch, not per square inch.

That I did not know. Thank you for the clarification!