Originally Posted by turts85
Clear action introduces flicker and is suggested that it should be off for gaming. GLL is on. Its not the 120hz vs 60hz that's an issue, its the fact the tv has motion blur with games or a duplication/ghosting effect. I should have expected this issue since it was an issue with last years 2015 M series, had great input lag but gaming suffered from a ghosting effect and long blur trails. I don't notice long blur trails on the P50 but it appears that some sort of blur is going on. The main reason I chose the P50 was because I am not a PC gamer so 120hz wasn't necessary for gaming, I wanted 120hz for my 24p Blu Rays since it would handle it better, which the P50 does pretty darn well with them anyway.
I recommended the x810c to that guy because it comes with a 120hz panel and IMO is better for gaming. He doesn't sound like he needs all the frills and thrills of HDR and DV, just wants a set that can perform very well with movies and games. The X810c has great upscaling and displays 4k content very crisp and nice. I prefer a TV that can perform well all around, I thought the P50 was the clear winner, but its gaming performance is killing it for me.
Anyway, back to Vizio
I own the P50.
Ok this is long overdue. This just needs to be said. So many people are getting this wrong and it is mostly because reviewers are mislabeling what is actually happening.
First off the picture below shows what “Motion Blur” looks like. This is where the backlight is held on continuously and the inherent latency in all LCD based TVs causes the outlines of objects to “Blur” with motion.
Almost all Sony TVs exhibit this “Sample and Hold” type of backlight. With the X810c image below you can see that there is a maximum amount of “blurring” possible. The outlines of the words are blurred across the screen but there is virtually no ghosting.
RTINGS.com incorrectly refers to this as “Minimum Motion Blur” when what they actually mean is this is “Minimum Ghosting”.
The OLED TVs also use the “Sample and Hold” type of backlight but they have virtually instantaneous pixel response so they have very minimal “Motion Blurring”. However, it is still there as the picture below shows.
A lot of people have become accustomed to the Blurring that Sample and Hold produces and almost all reviewers promote it as a good thing. For regular TV it really isn’t a bad thing because the longer camera shutter durations that are used produce a blurring effect anyway. That means that those TVs can get very bright and you don’t notice the motion blur because it is inherently there in the footage anyway.
However, with games and computer generated content this Motion Blurring is VERY detrimental. As you can see from the picture above it will blur scrolling text that is produced by a computer. The computer generated content is produced with discreet frames that were not filmed. Therefore, that content has very well defined object outlines unless they add additional blurring to mimic the film look.
For computer games “Motion Blur” is the worst thing possible. It will cause scrolling words to become unreadable and it will cause motion of objects to become blurred across the screen.
That is why OLED TVs really aren’t the best choice for Games. They use Sample and Hold and they generally don’t have anything like the “pulse-width modulation”(PWM) features that some LCD based TVs use. The beauty of PWM is that it can flicker the backlight to prevent the motion blur that Sample and Hold produces.
Now that isn’t to say that PWM is the end all be all. It isn’t. It has some severe drawbacks. For instance PWM flickers the backlight and that literally can produce a “flickering” effect on the TV. Sometimes this Flickering is so apparent that it can actually be nauseating. If that is the case then it obviously would be useless to that user.
It doesn’t end there either. PWM doesn’t hold the backlight on continuously so the light output of the display is reduced. This is why the Sample and Hold Sony TVs can get so bright. However, Samsung and Vizio will both switch to Sample and Hold if their backlights are maxed out so they can get very bright as well. See the pictures below for examples of how their backlights react at different levels.
Samsung KS9500 backlight response
2016 Vizio P-series backlight response
Like I said before Sample and Hold is fine for regular TV or movie content. However, it is a falsehood that PWM can improve sports. It won’t because of the inherent Motion Blur that the cameras produce.
Therefore, for regular TV and movies it actually doesn’t matter whether it is PWM or Sample Hold. Instead what matters there is if your pixel response time is absurdly long. So far there really haven’t been many TVs that have pixel response values that long. However, there is one 2016 display that really stands out as HORRIBLE for motion Blur. That is the 2016 Vizio E-series.
Vizio should be ashamed of the 2016 E-series motion performance as the image below demonstrates. This is enough pixel latency to effect even regular TV content and cause excessive motion blurring even above and beyond what is in the regular camera based content.
I wouldn’t accept a 2016 Vizio E-series if you offered it to me for free. Pixel latency like it has is unacceptable in all cases. Even turning on its Clear Action feature which enables aggressive PWM won’t help much. That is one TV I would avoid altogether as the reviewers correctly identified.
Also another issue that PWM can produce is the appearance of a double image or Ghosting. Instead of blurring the outlines of objects it will produce a well-defined image that is duplicated 1 or more times. This ghosting is often incorrectly referred to as “Motion Blur”.
Vizio P-series "Ghosting" without Clear Action enabled
The Ghosting is a big issue as well. However, it can be reduced significantly with aggressive PWM. That is why you should enable “Clear Action” with games even if you also have Game Latency Enabled as well. This will greatly reduce the ghosting effect and also give you exceptional input lag response time.
The motion interpolation controls can also be utilized to reduce if not eliminate Ghosting. However, those controls cannot be enabled with GLL so Clear Action is the better choice there.
With clear action enabled the Screen will dim and some flicker will be noticeable especially with all white backgrounds like web browsers. However, during video games the flickering should not be very noticeable at all.
I hope this helps clear up some of the misconceptions about “Ghosting” and “Motion Blur”.