Screen resolution query...

[giprabu]

A 21.5" full hd screen has a resolution 1920x1080.
A 32" or even 40" full hd screen also has the same resolution..

Which means, in all those screens, the pixel count remains the same.
but that should ultimately decrease the "pixel density" resulting in poor image quality.
But that doesn't happen . . why ?

Can some one make it clear for me ?

[lywyre]

Thats because you are as near to a 32" inch or a 40" screen as a 22" screen. In fact the pixel density in a 22" screen with a 1920x1080 resolution is far less than a decade old 17" CRT that manages 1280x1024 (Some older LCD monitor did have matching pixel density).

[NainO]

Resolution actually means "pixel density" not "pixel count".
Full HD resolution means 1920*1080 pixels per square inch. Irrespective of screen size the pixel density remains same for two displays with same resolution...

[lywyre]

Hmm. I thought it was dpi.

[NainO]

en.wikipedia.org Display Resolution

en.wikipedia.org Dots Per Inch

[desiibond]

Originally Posted by NainO

Resolution actually means "pixel density" not "pixel count".
Full HD resolution means 1920*1080 pixels per square inch. Irrespective of screen size the pixel density remains same for two displays with same resolution...

Didn't you get a request not to post just to increase post count? And please do not spread false information. What makes you think that FullHD resolution means 1920x1080 pixels per square inch? Am not going to explain in detail for you. Please read some books/docs and come back.

Originally Posted by lywyre

Hmm. I thought it was dpi.

yes. dpi (dots per inch) is what naino is trying to mention and he got confused between resolution and dpi.

[kalpik]

Originally Posted by NainO

Resolution actually means "pixel density" not "pixel count".
Full HD resolution means 1920*1080 pixels per square inch. Irrespective of screen size the pixel density remains same for two displays with same resolution...

Resolution = Pixel Count.. And I don't need wikipedia links to say this..

[desiibond]

@giprabhu

frankly speaking, 1920x1080 resolution was earlier meant for 24"+ displays. It suits really well for a 32" display.

It was the competition that had resulted in jampacking 2million pixels (1920x1080) into a 21.5" display.

one need not keep on increasing the pixel count for increase in display size. Another simple example is that the laptop's 14" display and 19" desktop monitor usually have same resolution. If you observe carefully, the laptop display looks too sharp (due to heavy amount of pixels) while desktop's display looks a bit soft.

For each resolution, there is an upper limit.

for ex, 1440x900 resolution won't look good on a 21.5" or higher size displays but it looks similar on 19" or lower resolution displays. Similarly, a 1920x1080 too will have a limit. It can fit and look similar on any size that is inside that limit.

[SunnyChahal]

Is it just me or this thread is really a noobfest?

[Zangetsu]

@giprabu: 1920x1080p means 1920pixels vertically drawn & 1080pixels horizontally drawn.....

picture quality is looks same for both 22" & 32"...only difference is hugeness......its like zooming the picture area preserving the details & quality.......

[giprabu]

Originally Posted by KaranTh85

@giprabu: 1920x1080p means 1920pixels vertically drawn & 1080pixels horizontally drawn.....

thats a very basic thing and i hope everyone knws that.

Originally Posted by KaranTh85

picture quality is looks same for both 22" & 32"...only difference is hugeness......its like zooming the picture area preserving the details & quality.......

thts wat i'm askin abt. how is it possible ? hope the pixels are of same size in all displays .

Originally Posted by desiibond

@giprabhu

frankly speaking, 1920x1080 resolution was earlier meant for 24"+ displays. It suits really well for a 32" display.

It was the competition that had resulted in jampacking 2million pixels (1920x1080) into a 21.5" display.

one need not keep on increasing the pixel count for increase in display size. Another simple example is that the laptop's 14" display and 19" desktop monitor usually have same resolution. If you observe carefully, the laptop display looks too sharp (due to heavy amount of pixels) while desktop's display looks a bit soft.

For each resolution, there is an upper limit.

for ex, 1440x900 resolution won't look good on a 21.5" or higher size displays but it looks similar on 19" or lower resolution displays. Similarly, a 1920x1080 too will have a limit. It can fit and look similar on any size that is inside that limit.

as per ur words, full hd resolution suites well for 32" and so what wud be its upper limit ? (approx 40" ??)
Then, our normal monitors shud appear sharper than those large TVs rite ? but thats not the situation here.

This is the case only with this particular resolution.
1440x900 is seen only(mostly) on 19".
1024x768 on 15.1"
1366x768 on 15.6"
.
.
but 1920x1080 on 21.5",23",23.5",24",32",40"...

I still don understand.

[arpanmukherjee1]

IMO this discussion is lacking in one key point ::

Dot pitch - Wikipedia, the free encyclopedia
Display Dimensions Calculator

will explain in greater detail if u say so...

[Zangetsu]

I think dpi is for images...& not for video's

[Cool Buddy]

Originally Posted by SunnyChahal

Is it just me or this thread is really a noobfest?

you are right. And sorry but I have to say, 1920x1080 in 1 square inch.......

Basically if you sit at 18" distance from both 22" full HD screen and 32" full HD screen, you will be able to notice the difference. But as soon as the screen size increases we tend to sit farther, so we fail to notice the difference. Full HD resolution on 22" monitors is a bit too much and not much use if you are surfing the web or working with text. It only looks better if you are watching Full HD movies or large photos.

Higher pixel density allows sharper pictures. if you look at screen resolution of mobile phones these days, they are much denser compared to computer monitors. for example, take the screen of my nokia 5230. it has a resolution of 640x360 on a 3.2" screen. If my 20" monitor has to have the same pixel density, it would have a resolution of 4000x2250. And I'm not even talking of the retina display on the iPhone.

1920x1080 is the most common resolution because it is the standard for 1080p video content. Most large screen are meant for viewing movies etc. and not for using with PCs. So if large screens were to have a higher resolution, it would ony distort the 1080p video content being played on it and the higher resolution would not be of any use. Hence the largest of monitors or TVs you see will have this resolution only.

There are monitors available from Dell, Apple etc. which have resolution of upto 2560x1600. higher than that is hard to find.

[giprabu]

^^convinced a little now.. thnks.

[NainO]

@desibond

Display Resolution (pixels) : Resolution refers to the number of pixels or dots present in one square inch of the screen.

- Guide to LCD & Plasma Televisions, Digit (2009)

The use of the word resolution is a
misnomer, though common. The term “display resolution ” is usually used to mean pixel dimensions , the number of pixels in each dimension ( e. g., 1920 × 1200) , which does not tell anything about the resolution of the display on which the image is actually formed : resolution properly refers to the pixel density , the number of pixels per unit distance or area, not total number of pixels . In digital measurement , the display
resolution would be given in pixels per inch. In analog measurement , if the screen is 10 inches high, then the horizontal resolution is measured across a square 10 inches wide.

- Display Resolution, Wikipedia

Dots per inch (DPI ) is a measure of spatial printing or video dot density , in particular the number of
individual dots that can be placed in a line within the
span of 1 inch (2 .54 cm) . The DPI value tends to
correlate with image resolution , but is related only indirectly.

- DPI, Wikipedia

Please explain!!! I'm the one who is in confusion now!!!

[Cool Buddy]

Resolution refers to the number of pixels or dots present in one square inch of the screen.

This is completely wrong

The confusion arises due to the fact that since LCDs became common we have come to assume that one display can work at only one resolution that is the native resolution of the screen. But if we recall, there was no concept of native resolution in the CRT era. For this reason while reading the definitions of display resolutions, the technical definitions do not match our pre=conceived ideas.

Simply put, resolution of an LCD display id it's native resolution. However if the input feed is of a different resolution, it would still work bu the picture quality would be distorted. For a CRT display, the resolution is whatever you set in windows (or whatever OS you are using).

[desiibond]

Originally Posted by NainO

@desibond


- Guide to LCD & Plasma Televisions, Digit (2009)


- Display Resolution, Wikipedia


- DPI, Wikipedia

Please explain!!! I'm the one who is in confusion now!!!

simple.

'Display Resolution', the term used to refer the resolution of LCDs is different from the term 'Resolution' that is used to refer 'digital measurement'.

a 1920x1080 resolution display simpley means 1920 horizonal pixels and 1080 vertical pixels.

if you remember the Bravia 2 television ad, Sony used to say '2 million bravia pixels'. 2 million is nothing but 1920 multiplied by 1080, resulting in total of 2 million pixels on the display.

[NainO]

@desibond & coolbuddy

Thnx
Third post in this thread (posted by me), was the result of confusion created by these statements. And you thought that was an attempt to increase my post count