Help me minimize "moire"

[Greebe]

Moire is produced soley by a misalgnment between the electron gun(s) and screen/mask/grill depending on type of crt used. To minimize it's effects you must adjust at the source... the monitor.
Most higher quality monitors have at least a horizontal moire adj. (if not both H and V moire adjustments). This is achieved normally by inducing a horizonally and or vertically polarized guassian type blur into the beam.

Graphics cards resolution and output can effect the moire produced by inducing harmonics which may soften it's effect, but this also negatively impacts the overall output/screen quality.

Changing from rgb to bnc cables with their increased bandwidth and responce time could make it stand out even more... but again this isn't the fault of the cable... or the graphics card... it's the monitors fault.

Adjusting front porch/back porch, H and V sync will not effect moire.

[Raptor^]

My Samsung 900 series monitor has absolutely horrific moire below 1024, but at 1024 and higher it disappears completely.

I never really cared, seeing as the only time I switch below 1024 is for the odd game, but I'll fiddle with some settings and let you know what happens if you want.

I run at 1600x1200@75Hz normally btw, image is clear and sharp then

[joelau]

<font face="Verdana, Arial, Helvetica" size="2">Originally posted by ccoltas:
I just bought an AGP ATI All-in-Wonder Pro for $50.00 CAN for my Dads PC to replace his old 2MB trident chipped PCI video card. Perhaps I'll try the 19" monitor on that PC and see if there is a difference. It will certainly give me an idea anyways.
</font>

Have you tried it out yet ? Very interested to know the results.

Regards.

[ccoltas]

Yeah. I'm gonna try it. Maybe today or tommorrow. I'm just lazy because a 19" monitor is SO FRICKIN HEAVY!

I have the Samsung 900 IFT 19" monitor. Raptor^ ? Which 900 series monitor do you have? SL, DF, NF or IFT? or other?

I'm going to try the monitor on my father's PC. Then I'll try the BNC connector. Then if that doesn't solve it, I'll take a deep breath and relax, so that I don't get the urge to put the monitor in my car and drive to Samsung in Mississauga and try to CRUSH one of the employees there for making me wait 3 weeks for a replacement monitor. Then I'll call Samsung one more time and ask what the deal is. I may bring it to an authorized Samsung service center and see if they can't fine-tune or adjust it.

let you know what happens......

[FrankDC]

First a quick thank you to Randy for suggesting the 1400x1050 custom resolution. I tried 1440x1080 on my Mitsubishi 2040u and wow, what a difference. For some reason 1600x1200 is terribly dark but the new resolution looks fantastic.

Also, this may or may not be relevant but a few weeks ago I was switching between a Geforce 256 DDR and G400 Max. On certain screens (e.g. Win2K's shutdown screen) there was horrible moire with the Max but none with the GF. Both cards were tested at the same resolution and refresh rate, on the same monitor. So at least in my case the video card did make a difference.

[joelau]

ccoltas, I don't have a Samsung monitor. I use a Sony G500 for my tests. I gave up on Samsung after buying their horrible VCR.

FrankDC, I agree with your point that video card did make a difference. At which resolution did you run the tests ?

Regards.

[FrankDC]

It was 1600x1200x32bit. Same results at 75, 85 and 90Hz.

[ccoltas]

Tried the 19" Samsung 900 IFT on my fathers PC with the Ati All-in-wonder 8 MB Pro video card and it was about the same. Maybe a tiny bit more moire on the ATI PC.

I have re-installed it on my G400 max PC and frankly it doesn't look good to me. I don't know if I'm picky, but it looks poor on the left and right sides of the screen. I am not pleased. Maybe its just me. I have tried the Matrox screen settings and it didn't seem to make any difference that I could tell properly. I may try again. I might try a BNC cable, but I doubt that will help.


How in the world can you make your own custom screen resolutions? I would really like to try that. It may very well clear up my moire problem. How do you do it?????

I have "matrox's own tweak utility". How do I use this thing??

Please help me try that!!!!!!!!!!!!

[This message has been edited by ccoltas (edited 29 January 2001).]

[FrankDC]

The utility is called Powerdesk Resolution Manager, there's a link to it here:
http://forum.matrox.com/mgaforum/For...ML/000486.html

Read the included text file for instructions.

[ccoltas]

I received my replacement Samsung 900 IFT 19" monitor. I hooked it up. It hasn't the moire problem that the first 900 IFT monitor had. It is not as sharp, however. This makes sense I guess, since moire and sharpness are probably a trade-off with one another.

I'll have to wait and see after using it for a few days.

I got the Powerdesk resolution thingy and I'm going to try that. Thanks. It was able to let me delete the resolutions i couldn't use.

[Greebe]

Did any of you read my post???

[The PIT]

I would say not.

[joelau]

Glad i didn't exchange my Sony G500.
I rather have sharpness.
Anyway moire is only visible when using certain dimly colored backgrounds & shutting down windows.

Regards.

[ccoltas]

The moire I had on the other 900 IFT was visible any time you were using a word processor with a white background, or if your desktop was grey or the default torquoise. It was bad. Now this monitor seems blurry for some reason. I'm not too pleased. I may try to have a technician increase the sharpness by adjusting the focus (?). I am not thrilled with the performance of this monitor. I am very picky though, so I'll have to wait and see.

[joelau]

<font face="Verdana, Arial, Helvetica" size="2">Originally posted by ccoltas:
The moire I had on the other 900 IFT was visible any time you were using a word processor with a white background, or if your desktop was grey or the default torquoise. It was bad. Now this monitor seems blurry for some reason. I'm not too pleased. I may try to have a technician increase the sharpness by adjusting the focus (?). I am not thrilled with the performance of this monitor. I am very picky though, so I'll have to wait and see.</font>

Wow, the 1st one definately has a serious moire problem. But now the blurry picture will probably spoilt your eye sight.
You should get it fixed soon or prepare to buy super thick glasses...

BTW, the monitor warranty is on-site or carry-in ?

Regards.