LCD Question

[dsorrent]

Hey all... I bought a 2005FPW and I am loving it. I can play pretty much any games on it and everything looks beautiful, except for one thing I noticed today.

I happened to surf over to GamerGod website and noticed when I scroll down, the image they use on the sides flickers like crazy! I guess it has something to so with the number of lines they are showing or something?

Is this normal for an LCD? Can this be corrected somehow? I was just curious.

Thanks!

 

[Nextman916]

i dont get flickering on that site.

 

[dsorrent]

Hmmm.. odd... for me, on the sides it flickers like crazy when I scroll up and down. Any idea what would cause that?

 

[Nextman916]

hmm well there are alot of horizontal lines on the side, but beats me

 

[mrkun]

Hmm... I thought Horizons got killed years ago. Guess not.

 

[gorcorps]

Well the little lines look to be 1 maybe 2 pixels high on my 19" CRT here in. You're probably using a higher res meaning they'll barely be 1 pixel high. You also have the little screendoor effect on LCDs so a mixture of the tiny lines and the screen door could give you that effect on your display. The good news: I don't think it's a monitor problem. It's the site making the lines too thin for such a high res.

 

[Unkno]

yup gorcorps is correct....


I am using a Dell 2005FPW and i have the same effect on my monitor. It's just that the space inbetween the lines are so small that it makes it look like it's flickering. Diffenitely not a monitor problem and/or a ghosting problem.

 

[xtknight]

It is a ghosting problem and it will happen on CRTs too. Interlocked lines don't go good with transitioning pixels. The speed at which you scroll the page greatly outpaces even the CRT's phosphors. Try it on a CRT and it will happen a lot less but it will still happen. Well I've seen it on a CRT anyway. Since I still see it on a DVI connection it's not interference either.

 

[xtknight]

LOL, you guys will feel like eating me alive after your eyes have to go through this, but here's how bad it can look on an LCD:

http://home.comcast.net/~asmatte/barcode.htm
Load that and move your browser window around. You'll see it on a CRT too (I think).

Report back, if you can still see afterwards. :laugh:

Basically as one crystals goes from 0->255, the other is still stuck in its fall state and they get overlapped. One falling and one rising and they combine in to almost a brown on my LCD. This is how dithering works, it's just not quite as, let's say, painful. Frame Rate Control (to emulate 16.2m colors on a 262K color LCD) is used in terms of the pixel subtlely flickering, but it's nothing like white to black flickering.

Edit: made that test a little harder for LCDs. Now they have to go from 0->255 and from 255->128...even worse. Try that test here:
http://home.comcast.net/~asmatte/barcode2.htm

Here's something else interesting. It's not purple and black interleaved, it's red and blue. Good convergence test.

http://home.comcast.net/~asmatte/barcode3.htm

 

[dsorrent]

Ahh, thanks all... well, I'm glad to know it's not just me.