Originally Posted by gwimmel
Originally Posted by tgm1024
This TV will not display 1080p/120 via 120Hz input if what you want is frame-for-frame displayed what the PC is sending. The TV will say 1080p/120Hz in the upper left corner, but that's only the receiving rate. You need to run one of the various utilities to see if the TV is performing frame-dropping (AKA frame-discarding). The R550A's will display 720p/120 however.
That's what i was doing, i got the tv to successfully display 720p120 input from my TV and confirmed via frameskipping test on testufo that it was displaying all 120 frames.
As far as the burn-in goes, i was told it was just image retention and it will go away after watching something. I can also confirm retention like this doesn't happen in normal conditions, otherwise my desktop would be quite burned in by now, it only took 2 minutes of the black frame insertion to leave that SCORE on my tv.
LCD's don't have "image retention" in the normal sense though. I wonder what's happening. In LCD's, the color of any subpixel is totally fixed as a filter (the backlight shines through it). (Note: except for the weird quantum-dot/LCD hybrids like the higher end sonys). The light shining through it is metered by the (essentially grayscale) LCD element. The only way for image retention to happen is for the LCD crystal itself to remain oddly less responsive to change. That's peculiar. It's only something that very very few people ever see.
My old-ish (circa 2006) laptop is an LCD and it's using what I'm sure is among the cheapest screens around, especially by today's standards. And I've left it on a static image overnight several times full blast (which only means the crystal is wide open...there's no burning from it) without screensaver or power-off, and I've *never* had image retention of any kind.
I think the TV is defective in some way. And I'd like to know what's actually happening underneath it all to cause that on an LCD these days. The LCD elements must become less responsive to change when left in one state for too long or something.
Edited by tgm1024 - 11/27/13 at 1:01pm