Link to home
Start Free TrialLog in
Avatar of ItsChad
ItsChad

asked on

LCD Monitor - Why is a 17" Dot Pitch less than that of a 15" monitor?

I am confused by a few things with LCD monitors, and I really only need to know the answer of this because I am puzzled by this.  Why is it that a 17" LCD monitor has a dot pitch that is less than a 15" monitor? I thought because of the screen size the dot pitch would be larger instead of smaller?

Also I am confused because then 19" Monitors jump back up: Below is an example of their dot pitch, could you please help me figure it out ?


15" Monitor, .297mm dot pitch
17" Monitor,  .264mm dot pitch
18.1" Monitor, .2805mm dot pitch
19" Monitor, .294mm dot pitch
20.1" Monitor, .255mm dot pitch
23" Monitor,  .294mm dot pitch

I just dont understand why the 15" has the worst dot pitch of all, and the best dot pitch is a 20.1" monitor.

I am working on building computer systems for a medical office that use digital imaging x-rays, and a requirement is a dot pitch under .27. This is how I came across this.

Thanks,
Chad

I am sure it is a simple explanation but 500 points for saving my mind.
Avatar of cooljai1
cooljai1

Hi ItsChad,
Talking about dot pitch, smaller the dot pitch, sharper the image. so thats the reason why newer 17" monitors have a smaller dot pitch

Cheers!
CoolJai
If your Physician is going to be reading x-rays, then the best thing to do is to use a diagnostic monitor.  We use Barco monitors.  You can read up on them here: http://www.barco.com/medical/
think of the dot pitch in terms of DPI (dots per inch), as cooljai1  said, the smaller the dots (dot pitch) the more dots can fit on the screen and therefore give you more resolution and better picture
Avatar of ItsChad

ASKER

right I understand that the image will be sharper, however I dont understand why an image would be sharper on a 17" than a 15". The only thing I can think of is that it is based on resolution, so the 17" has a higher resolution and a smaller dot pitch, the 19" has the same resolution so the screen is actually stretched and the image isnt actually bigger the dot pitch is just spread out further? Does this sound correct?
an added note, the size of the monitor (actual screen size) doesn't make much of a difference in the dot pitch, as you can have a very small screen with high dot pitch, and a very large screen with a very small dot pitch, it all depends on the brand/manufacturer
I wouldn't say it's "stretched" more like less clear.  less refined edges. more distortion, etc
Avatar of ItsChad

ASKER

Well I am going by the common ground I have found, for example we originally wanted to go with 15" monitors, however his program requires under .27 for the dot pitch. Well all the 15" s I found were.297. The only monitors I found with the small enough dot pitch were 17"(and everyone I looked at was the same pitch) and 20.1".
Avatar of ItsChad

ASKER

"I wouldn't say it's "stretched" more like less clear.  less refined edges. more distortion, etc"

But that is due to having less pixels on the screen, basically the same amount of pixels have to cover a larger area?
"But that is due to having less pixels on the screen, basically the same amount of pixels have to cover a larger area?"

--yes
ASKER CERTIFIED SOLUTION
Avatar of jfolliot
jfolliot

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of ItsChad

ASKER

Ok thanks alot, I guess I understood it but didnt know for sure if I was right.

For looking at images like x-ray's then he is best off with a smaller dot pitch monitor correct? I know sometimes the less dot pitch the harder the text is to read because it becomes to sharp for some people. But for images the lower the dot pitch the better correct?
"For looking at images like x-ray's then he is best off with a smaller dot pitch monitor correct?"
- I would assume so, unfortunately, I don' know much about x-rays


"I know sometimes the less dot pitch the harder the text is to read because it becomes to sharp for some people. But for images the lower the dot pitch the better correct?"

- if the image ever became "too sharp" I believe you could just turn down the res., but yes, lower dot pitch = better image generally.