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-   -   Back to monitors (https://www.pprune.org/computer-internet-issues-troubleshooting/438735-back-monitors.html)

Loose rivets 5th January 2011 21:01

Back to monitors
 
Back to monitors. After the last discussion on here, I really put some thought into my 75hz v new-ish 60 hz 24" The latter is a Samsung, and pictures take on a new meaning - even some I'd looked at for years, but the flicker!!!

The Samsung is sitting unused in a bedroom while I use a restful LG W1952. at 75hz


I know I'm prone, but surely I can't be the only one that suffers this problem.

AnthonyGA 5th January 2011 23:28


I know I'm prone, but surely I can't be the only one that suffers this problem.
Problems with perceptible flicker are rare above 40-50 Hz, which is why motion pictures have been able to get away with 48 fps (24 images per second, each projected twice) for decades. Conventional television also gets away with 50 or 60 Hz, with two interlaced half images projected at half this frame rate.

I've never had any problems with 60 Hz and in fact I'm using it now. A small minority of people might still see flicker at that rate under some conditions. Bad conditions include high brightness images, seen in peripheral vision, in a dark room. The effect diminishes very rapidly at the high end with increases in refresh rate, so even a small increase might make the flicker "go away."

The type of display makes a difference. CRTs with their flying dots are much more prone to produce perceptible flicker than flat panels, since the latter are more or less continuously lit. The only problem with flat panels is possible slight smearing of motion with fast animation, but that problem is rapidly disappearing as flat panels advance.

What really used to irritate even me (and I'm not very sensitive to flicker) was low refresh rates on a CRT with interlace. Thank goodness that's history now. I was surprised by how many people weren't bothered by it at all, which shows how much individual variation there is. In fact, I'm surprised by the truly terrible images that people are willing to tolerate sometimes. I guess they don't care how much eyestrain they get.

green granite 6th January 2011 15:24

LR, found this in a forum, might help with you flickering problem.


've now determined that it's a driver incompatibility between the ATI catalyst drivers and my viewsonic monitor. I have tested every scenario of monitor and card combinations with a friend's peripherals. All ATI cards cause my Viewsonic monitor to flicker. All versions of the catalyst drivers do this. Are there other versions of the ATI drivers that don't involve this catalyst garbage? And I know that you can download the display driver only, but that doesn't solve the problem. Are there other third-party ATI drivers that aren't omega that anyone here has used? Thanks.
Plus


Well, after doing more research for about 3 more hours today, i found a site that gave me some glimmer of hope. They also made me realize why i REALLY hate ATI. So, it appears that the ATI drivers for the new graphics cards seem to be bad with different monitors, so you have to downgrade your card.

Catalyst Control Center
All the way to the bottom click on ATI Overdrive
Click the lock to turn on Overdrive
Where is says GPU Clock: (leave this alone)
Where is says Memory Clock: Default is like 950, you need to bring it down to 900.That removes all the flickers and gives you a glimmer of hope. Only downfall to this, you spent $300+ to get a graphics card that can be overclocked and because ATI sucks &#$@, you now have to downgrade your expensive graphics card. Your best opinion to repair this, is RETURN the card in question, get your money back, get the xfx GeForce GTX 285 or 295. Suggest going with 285 till you are 100% sure that the newest GTX 295 doesn't have any flaws. Hope this helps you.
Also have a look at: LCD monitor technology and tests

Loose rivets 6th January 2011 16:17

That's very interesting. Thanks.


Mr Mixture. This is the one.

TFT Central - LCD Monitor Information, Reviews, Guides and News


This may be ultimate thread-drift, but good visual interpretation of what we see is the final goal I suppose.


As mentioned above, off retinal center is worse - especially around the 'blind spot.'


Looking at Windoze on my 50" telly is a misery of flickering. Although not too bad with films. I run it at dark-ish levels, almost always in a dimly lit room. It is capable of 120hz, but my DVD Up Converter or computer output never go higher than 60. I wish I could find a way to force it to be recognized by the computer, but it just shows it as a generic PnP. albeit, at full 1080p


Film: I know we used to say 16 then later, 18 FPS for movies, but for some reason it doesn't seem the same.

I was able to read the label on DC3 props at tick-over. Flying, and driving quick kit all seemed to be happening in slow motion, but ask me how many bars was on a colleague's arm, and I could only tell it was four by not being able to tell - if you see what I mean. 3 fine, 4, they would jazz.

I like to spread the word on this in case other youngsters have the same problem. I can't stress this enough, but in my study of classical migraine in aircrew, I learned about Tryptophan

copy protected, but it shows how some people can have differing chemistry involving tryptophan. Tryptophan Food Sources, Tryptophan Side Effects, Benefits, Deficiency

My son protested that it takes a combination of chemicals to get the stuff through the blood-brain barrier, but I'll have to show him this link.


...when I eat cheese scanning text on screen or page is difficult. If I don't eat it, reading etc is much, much better.


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