I am not suggesting that an LG OLED RGBW TV has a reduced resolution. There are
as many pixels as on an RGB TV, but they are composed of 4 square sub-pixels in
a larger square pixel. LG do this to improve the efficiency. Because of the RGB
color filters the white sub-pixel is three times as efficient in making white
light as the R+G+B together. They simply send MIN(R,G,B) to W and the remainder
to 0 to 2 of the R,G,B. But this gives a funny positioning of the information,
also depending on the color saturation, something for which ClearView cannot
compensate. Small text looks jagged. TVs are not required to display small
text, monitors are. ClearView is a form of sub-pixel sampling. Drs
Klompenhouwer and van Heesch have written extensively about this in their PhD
thesis'. There IS gain to be had from proper sampling, but not after the signal
has already been sampled for another resolution. Judging the quality of the
Nyquist frequency (0,1,0,1,..) is nonsense, this is what your reference seems
to be doing. Properly anti-aliased content looks okay at any (re-sampled)
resolution, but this is something that TVs are supposed to be good at, not
monitors. "Fuzzy" is not appreciated up close.
Cheers, Jeroen's left hand
________________________________
From: cooleman@xxxxxx <cooleman@xxxxxx>
Sent: Monday, June 19, 2017 5:47:50 PM
To: opendtv@xxxxxxxxxxxxx
Cc: opendtv-bounce@xxxxxxxxxxxxx; Stessen, Jeroen
Subject: Re: [opendtv] Re: Use your TV as a computer monitor: Everything you
need to know
Stessen, Jeroen schreef op 19-06-2017 17:39:
Hi,
Watch what happens if you connect an LG OLED TV with RGBW sub-pixels.
Windows ClearView will fail on rendered text in interesting ways.
Re-tuning ClearView won't help, as the TV itself is responsible for
shifting grey from RGB to (the position of) W.
Greetings,
Jeroen