IPS vs VA pixel structure sharpness.

Joined
Jul 2, 2016
Messages
21
So I am curious which one has the superior native sharpess since IPS and VA use different pixel structures. I've read some reviews about VA monitors having interlacing or traces of other flaws. Do you guys have any education you can on me on this subject so I can make a well informed decision on my next purchase. Thanks
No fanboy stuff please, just facts. "All LCD technologies suck equally."
 

NoxTek

The Geek Redneck
Joined
May 27, 2002
Messages
9,299
So I am curious which one has the superior native sharpess since IPS and VA use different pixel structures. I've read some reviews about VA monitors having interlacing or traces of other flaws. Do you guys have any education you can on me on this subject so I can make a well informed decision on my next purchase. Thanks
No fanboy stuff please, just facts. "All LCD technologies suck equally."

I don't think there is a difference in sharpness between panel types per-say. They're all pretty much square pixels although some IPS panels are chevron shaped, but they're all pretty sharp pixel for pixel. The largest differentiator (is that a word?) between all of the types is viewing angle and to a lesser degree contrast and pixel response. For instance IPS panels have the best viewing angles and color uniformity across viewing angles, but have relatively poor contrast resulting in less than stellar blacks. VA panels have great blacks but poorer viewing angles and color uniformity, especially viewed up close like you would when using a display on a computer.

The one possible instance I can say where a panel type has an effect on sharpness would be with panels that have a staggered pixel arrangement. Take the LG 43UF6430 that all of us had high hopes for as a possible PC monitor when it came out with competitive pricing last year. Turns out it had a staggered RGBW panel (it had an extra white subpixel too). The staggered pixel arrangement results in slightly fuzzy edges because the pixels aren't vertically aligned down the screen. Made it great for watching video content but horrible for general computing. But thankfully there aren't a lot of panels like that especially in the PC display space...
 

igluk

Gawd
Joined
Nov 1, 2014
Messages
718
The subpixels of current VA (both Samsung and AUO) work in a different fashion than other panel types.
Instead of dimming the whole subpixel, they are made up of 2x4 domain sections and when displaying darker halftones they can dim or turn off only one section (half subpixel)
http://i.imgur.com/6NsJuVV.jpg

White
http://www.ixbt.com/monitor/samsung/s27d590cs/px-100.jpg
Mid grey
http://www.ixbt.com/monitor/samsung/s27d590cs/px-50.jpg
Dark grey
http://www.ixbt.com/monitor/samsung/s27d590cs/px-25.jpg

Some VA's - especially the 34'' SVA - have squat subpixels that's where the reported sharpness problems come from.
How much of black space/pixel gap (-> interlacing patterns) is between the rows of pixels, whether it is enough to become noticeable, that can differ wildly from panel to panel. (and also depends on ppi)
For darker content the gap is indistinguishable from the content itself.
e.g.
http://www.prad.de/images/monitore/hp_envy_34c/coating.jpg
http://www.prad.de/images/monitore/samsung_s32e590c_led/coating.jpg
https://pcmonitors.info/wp-content/uploads/2015/03/S34E790C-subpixels.jpg
https://pcmonitors.info/wp-content/uploads/2015/11/S27E650C-subpixels.jpg
https://pcmonitors.info/wp-content/uploads/2015/08/EW2750ZL-subpixels.jpg
 
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