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screen door effect?

M

morfinx

[H]ard|Gawd
Joined
Feb 18, 2005
Messages
1,105
Can someone enlighten me on what this "screen door effect" is on a LCD?
 
As far as I know, if it's the same as what I say on my V912b that I returned, it's basically every other row of pixels is darker or brighter than their neighbors, or perhaps the columns of pixels are slightly seperated, creating a visual effect just like looking out throw a screen door or a screened in pool area.

Side question though to anyone else reading this: 2001FPs that are shipping these days, do they still have it? I'm growing a little weary of waiting for 2005FP's to get it right with backlight and pixel issues..
 
I just got my 2001FP and I see no "screen door" effect. 'Course, I'm not exactly sure what I'm looking for.

But at 1600x1200 (on DVI) from a Radeon 9800 Pro, it is just beautiful.
 
shocksyde said:
oh my god, that's what it is?

and people return monitors for this? christ...
Click to expand...


LOL that is what I was thinking. I looked close at my 600m, like eyes touching the screen and I see the black lines. However, it hurts my eyes. Seriously though I can even notice that. I was fairly subutle with the black light issues on the 2005fpws but this. Wow.
 
Can You explain me clearly what i should looking for on this screenshots ?
Thx,

Peacemaker.
 
yeah, the owner (morgan humes) went to my highschool and i hung around with him a little bit, so i visit the site on occasion
 
Heh, I returned a Viewsonic 912b I believe it was last week, BUT, it was MUCH worse than that. I sit about two feet away from my screen I say and it was clearly visible, on everything but a black background. Ugh. I wasn't even sure thats what it was either, because I'd never even seen it on an LCD before.

But if someone would return it for those screen shots, then yeah, they're a little anal ;)

Edit: Oh, and thanks Rainman, I'll be feeding mine off a 9800 Pro as well, so good report. Thanks
 
Ugh! The screen door effect is on the Viewsonic 912B as well? I was planning to pick one soon...oh well...I looked at the Viewsonic 201B but the screen door effect really bothered me.

-Croyd
 
compslckr said:
http://slackerserver.com/uploaded/screendooreffec1123454566666t.jpg

that is a picture of what the screen door effect looks like. that is a pic of my monitor (advueu 17" 16ms response time)

while using the monitor it is not noticable at all, but if you take a pic of it up close you will see it.
Click to expand...

That doesn't look like the screendoor effect, that's just the space between the pixels, like every LCD has. The screendoor effect, like on a 2001fp, can be best described as every other row of pixels being darker. So it's much worse than what's in your pic. Or maybe the spacing is worse on certain monitors, creating a grainy look.

Here's a pic of my 2005fpw with a macro shot:
http://premium1.uploadit.org/TimothyB/new_2005_002.jpg

It might look bad there, but that's not the screendoor effect as you can't see those lines until your eyes are inches from the screen. 2005fpw has never been commented to have the screendoor effect.
 
wow, that does look alot different than mine. i dont think my cannon a60 can focus any closer than the pics that i took above even in macro mode.

your pic shows it much better than mine, thanks for posting it
 
compslckr said:
yeah, the owner (morgan humes) went to my highschool and i hung around with him a little bit, so i visit the site on occasion
Click to expand...

morgan went to rit for a year before he went on mission, and he spent a lot of his time hanging around with my roommate. do you know andrew durgin?
 
yeah, i knew andrew, he also went to my high school (granby memorial HS) I have not seen him in a long time, does he go to RIT too?
 
compslckr said:
wow, that does look alot different than mine. i dont think my cannon a60 can focus any closer than the pics that i took above even in macro mode.

your pic shows it much better than mine, thanks for posting it
Click to expand...

Yes, it shows what an LCD looks like upclose very well, but it's normal for any LCD too look like that and is different from the so called screendoor effect. Each dot represents one pixel built into the screen, that's why there are native resolutions on LCDs to match them and unfortunatly they having spacing between them.

And even though my pic makes it look bad, just look at how large that start button is, it's a huge closeup and in person you can hardly see the spaces until your too close to the screen.

Also, I did see a pic of the 2001fp and it did have a horrible screendoor effect, like it was a dithered or something. I would have posted a linke to the thread but the photos are now broken.
 
You guys realize that the space you see between the pixels is called the
dot pitch.
The lower the dot pitch, the less space between the pixels, the less of a
screen door effect.
19" LCD monitors have the worst dot pitch. They're basically running the same
amount of pixels as a 17" LCD (1280x1024), but on a larger screen.
More space between pixels.
That's why your Viewsonic 912B had it the worst.
A 20.1" running at 1600x1200 should have the best dot pitch you can get at this time.
17" LCD's at 1280x1024 also look good.
Too bad nobody makes a 19" that runs at 1600x1200.
LCD monitors have such razor sharp pictures though, you're going to see it no matter what.
Push your monitor back a little more. That helps.
 
I once had a 15inch laptop with 1600*1200, uxga I think, now there you'd have the best spacing, just an amazing picture.

On a 19nch LCD with 1600*1200. I bet that wouldn't sell well since it would cost the same as a 20inch with the same resolution, and I think most people would go for that extra inch. Thinking of that, with 17inch and 19inch having the same number of pixels, you'd think they cost near the same. And generally thinking making things smaller, the 17inch, it would cost more, or maybe less since the backlighting doesn't need to be as good.
 
compslckr said:
yeah, i knew andrew, he also went to my high school (granby memorial HS) I have not seen him in a long time, does he go to RIT too?
Click to expand...

he does. he's sitting behind me reading something about politics and technology. sounds pretty boring, but meh. poor bastard has a paper on it due tomorrow. might you be tekniq or teqnik or something?
 
Cygnus_X1 said:
You guys realize that the space you see between the pixels is called the
dot pitch.
The lower the dot pitch, the less space between the pixels, the less of a
screen door effect.
Click to expand...

I didn't think that dot pitch on an LCD monitor has any relationship to the space between the pixels. AFAIK, dot pitch on an LCD is simply the number of millimeters per pixel.

For example, the 2001fp has a dot pitch of .255 because it has 1600 pixels across and is exactly 408.0 mm wide. 408/1600 = 0.255. Similarly, the 2405fpw has a dot pitch of .270, because it has 1920 pixels across and is 518.4 mm wide. 518.4/1920 = 0.270.

Two monitors with identical dot pitch might have different amounts of space between pixels because on one the pixels are smaller and surrounded by more black space. At least that is my understanding of the issue.
 
Darth Bagel said:
he does. he's sitting behind me reading something about politics and technology. sounds pretty boring, but meh. poor bastard has a paper on it due tomorrow. might you be tekniq or teqnik or something?
Click to expand...
no, i am not tekniq, but i have him on my aim buddy list and i dont remember who he is. lol
 
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