It could be China "Panda" panel...
I just found a Russia review
ПРЯМО В ЦЕЛЬ! ОБЗОР И ТЕСТИРОВАНИЕ WQHD МОНИТОРА LG 32GK850G-B
"The Internet is full of rumors about the alleged matrix in the LG 32GK850G and confirmation of the use of the panel from Samsung or AUO has not yet.
Most likely, the Koreans used the development of a little-known company Panda, which manufactures * VA-matrices,
which can be found on some models from AOC and Philips."
"Comparing the novelty with competitors based on SVA-panels from Samsung, it should be noted that the difference for the end user will not be fundamental.
On some transitions faster * VA-panel from the alleged company Panda, on others - SVA from Samsung.
If you have a principle based on this technology and require a high speed, then choose according to the capabilities and requirements for adaptive synchronization systems."
And I check PCmonitors review,
AOC Q3279VWF review include a pixel picture.
It looks like... also 6 sub-pixel system too..
Maybe it is the most possible answer..
Even I believe...
And like you said,
"text inversion" even because LG use "Panda" panel, so got better result..
How you think about this theory?