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Shaky screen on grey background

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Could you guys please check if this image : http://emaculation.com/minivmac/minivmac1.jpg makes your display flicker on the grey background of that window? It is actually quite noticeable here. (checking it on Windows would also be appreciated)
 
Joined
Mar 12, 2013
Messages
283
Motherboard
HP ProBook 4530s
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Intel Core i3 2330m
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Intel HD 3000
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I did some research on this matter and found this: http://www.lagom.nl/lcd-test/inversion.php
There is an interestic section called "Background", which basically states that the flickering which we see is a result of "polarity inversion".

TL;DR:
In liquid crystal pixel cells, it is only the magnitude of the applied voltage which determines the light transmission (the transmission vs. voltage function is symmetrical about 0V). To prevent polarisation (and rapid permanent damage) of the liquid crystal material, the polarity of the cell voltage is reversed on alternate video frames. Unfortunately it is very difficult to get exactly the same voltage on the cell in both polarities, so the pixel-cell brightness will tend to flicker to some extent at half the frame-rate. If the polarity of the whole screen were inverted at once then the flicker would be highly objectionable. Instead, it is usual to have the polarity of nearby pixels in anti-phase, thus cancelling out the flicker over areas of any significant size. In this way the flicker can be made imperceptible for most "natural" images.
(...)
The inversion pattern for any given screen will inevitably flicker to some extent and is not a fault. If it really flickers a great deal then it may indicate that the common-electrode voltage has not been set up properly. In that case you might also perceive a "dot crawl" effect on plain colours of medium brightness. A grossly mis-set common-voltage will also make your screen more susceptible to temporary 'image sticking' problems.
(...)
Laptop LCD screens tend to be optimised for lower power, with some relaxation of image-quality criterion. As well as (often) lower brightness and less saturated colours, laptop screens usually use a 'row inversion' (aka 'line inversion') scheme rather than the dot inversion now universal in desktop screens. If you look closely at a row-inversion LCD, particularly if it is showing a fairly plain, mid-brightness colour, you may see a slight horizontal line interference pattern on alternate lines, which may appear to drift up or down the screen. This is also not uncommon on colour mobile-phone displays, or personal DVD players.
( from http://www.techmind.org/lcd/ )
 
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I have this issue as well, i think it's been the same with SL, Lion and ML. Don't remember having the problem on Windows though, but i'll examine that when i get a second hdd installed.
mr-andrek, I get slight flickering in that picture. Not as bad as on solid white and grey backgrounds.
 
Joined
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(...)Don't remember having the problem on Windows though, but i'll examine that when i get a second hdd installed.(...)
Please do and do it thoroughly. The explaination I provided before seems to be precisely saying that this is an OS-independent issue and rather something to do with electricity/display.
I guess you could boot up Windows and go to http://www.lagom.nl/lcd-test/inversion.php and see whether any of the 11 (1-7b) boxes flickers for you (also check out the bigger preview below them - cycle through each of them). Mine is flickering at 7a and 7b the worst, slight at 1, 3 and 5.
 
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Could you guys please check if this image : http://emaculation.com/minivmac/minivmac1.jpg makes your display flicker on the grey background of that window? It is actually quite noticeable here. (checking it on Windows would also be appreciated)

None at all for me on that image, is it possible that certain models have different displays?

I know mine is a 4530s, but there are varying models, is it just related to the cpu or other components too?

If we're suggesting it is OS related, why is mine ok?

edit* tested on chrome, and now safari

*edit 2

I just installed blackmagic disk tester (assuming thats the app Rm is mentioning) there is a very slight flicker at the bottom of that where the boxes/ sections are.
 
Joined
Mar 12, 2013
Messages
283
Motherboard
HP ProBook 4530s
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Intel Core i3 2330m
Graphics
Intel HD 3000
Mac
  1. MacBook Pro
Mobile Phone
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None at all for me on that image, is it possible that certain models have different displays?

I know mine is a 4530s, but there are varying models, is it just related to the cpu or other components too?

If we're suggesting it is OS related, why is mine ok?

edit* tested on chrome, and now safari

*edit 2

I just installed blackmagic disk tester (assuming thats the app Rm is mentioning) there is a very slight flicker at the bottom of that where the boxes/ sections are.

It certainly is possible that stock (with not having changed to a full hd display) 4530s could have different types of screens. You can check yours in OSX by using the following command:
Code:
[COLOR=#000000][FONT=verdana]ioreg -lw0 | grep IODisplayEDID | sed "/[^<]*</s///" | xxd -p -r | strings -6[/FONT][/COLOR]
(in Terminal, obviously)

Mine is SAMSUNG 156AT05-307.

Also, check the pictures on http://www.lagom.nl/lcd-test/inversion.php
 
Joined
Jul 23, 2012
Messages
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Motherboard
HP Probook 4530s QJ763AV
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Intel i5 2430m 2.40 GHz
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Intel HD3000 / Radeon 7470M
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Classic Mac
Mobile Phone
  1. Android
Please do and do it thoroughly. The explaination I provided before seems to be precisely saying that this is an OS-independent issue and rather something to do with electricity/display.
I guess you could boot up Windows and go to http://www.lagom.nl/lcd-test/inversion.php and see whether any of the 11 (1-7b) boxes flickers for you (also check out the bigger preview below them - cycle through each of them). Mine is flickering at 7a and 7b the worst, slight at 1, 3 and 5.

I have tried this link through the Windows 7 virtual machine and the boxes 1 and 7b are flickering very bad, also anything that flickers through Mac OS X flickers there too, but I don't know if it's because it's a virtual machine. Because recently when I removed Mac OS X completely and installed Windows 7 I didn't have this problem, or it wasn't noticeable. Now back in Mac again it's so bad, I get dizzy after some time just browsing this forum. lol

The Terminal command shows that I have this LCD model: B156XW02 V2. A Google search shows that it's an AU Optronics screen.
 
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