First of all
e-IPS is not E-IPS and vice versa.
e-IPS is not H-IPS and vice versa.
e-IPS most often seen in vertical layout with simple, stripped subpixel structure.
H-IPS most often seen in horizontal layout with complex subpixel structure.
small "e"-IPS is often referred to as economic version.
e-IPS is most often seen in computer monitors, "Officially" it is a simplified version of S-IPS. e-IPS main advantage is cost reduction.
This is same as the Samsung SPVA vs Samsung cPVA. The small "c"PVA is a simplified version of SPVA. This is also aiming at low cost market and on computer monitors.
Don't compare LG's vs other manufacturer's (for example: Hitachi IPS Panel maker) IPS panels as they are developed by each of their own, so they can be a bit different.
Old documents don't mean anything anymore since they are based on Hitachi and Panasonic. And the document itself is old.
Panasonic is the only one that is making the IPS-a Panel.
Their TVs which use IPS-a panels are often seen in 32" and 37" only, and for larger sizes you will most likely to be getting LG Display S-IPS.
For LG Display, there are four types of IPS
AS-IPS, S-IPS, H-IPS, e-IPS
the first three types are used in TVs and the last one is used in computer monitors.
However no matter how advanced or how improved a IPS panel goes. LG Display still calls them S-IPS.
(pic = AS-IPS, used in my LG LH95)
(pic = S-IPS, can be found in LG LH30, LG LH50...etc)
(pic = H-IPS, can be found in LG LH20)
(pic = e-IPS, can be found in computer monitors)As you can tell from aboveAS
-IPS used in High-End LG TVsS
-IPS used in Mid-End LG TVsH
-IPS used in Low-End LG TVse
-IPS used in Computer Monitors