IPS (
In-plane switching)
IPS was designed to solve the main limitations of the twisted nematic field (TN) matrix LCDs in the late 1980s. These limitations included strong viewing angle dependence and low-quality colour reproduction. In-plane switching involves arranging and switching the orientation of the molecules of the
liquid crystal (LC) layer between the glass substrates. This is done, essentially, parallel to these glass plates.
The main advantages with IPS is that the technology offers excellent colour reproduction as well as much better viewing angles. The downside is a difficulty to emphasise blacks, which in turn can result in problems with the contrast, more so when viewing in a dark environment.
VA/MVA (Vertical Alignment/Multi-domain Vertical Alignment)
VA/MVA panels offer good viewing angles and generally better blacks and contrast than IPS panels. Their response times also look good on paper, but unfortunately not in the real world
Even if the response time for white to black is low, it is often considerably higher between two dark tones, leading to Ghosting effects.
VA panels use liquid crystals and electrical current to tilt polarized glass but have a slightly altered manufacturing process. The result is a deeper black background, better image quality, and a higher contrast ratio over IPS. They also offer better control of light and less light leakage. If you like great viewing angles and dark blacks, VA is the best option.