how to check tv size in settings

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r/4kTV on Reddit: How can I check the resolution of my TV so I know the box isn't lying

September 21, 2022 -

I have owned a few lower res TVs with basic HD, FHD and 4K. I am trying to see if there is a way I can run a test to check to make sure the resolution on the box isn't a lie. I've seen TVs advertised as "True 4K" and 4K. Some TVs I had look cleaner than others or accept a higher res signal and still look the same. Mainly 762p TV's advertised as 720p sets that accept a 1080p signal and TVs advertised as 1080p that look the same.

One that's baffling me right now is a 1080p set I just got that has real bad button lag at 1080 but hardly any at 720p. I read that this could be because it is Downscaling and it can cause lag. Seeing if techies out there know a way to check a true resolution of any tv vs BS advertising methods.

Top answer

1 of 5

Just google the model number.

2 of 5

All modern 4K screens should truly be 3840x2160 4K and not some odd resolution, unless some of the trash tier cheap as shit 4K screens from obscure manufacturers use some weird panels? I had to refresh my memory on this, but there is a reason for why 768p existed in the 720p, 1080i and 1080p era, and it was down to manufacturing cost cutting and trickery. Apparently at the time the most common LCD PC monitor display resolution was 1024x768, so it was easier to retool the manufacturing lines for 1366x768, just stretching the panel dimensions horizontally to "close enough" widescreen aspect ratio, than redefine horizontal and vertical dimensions of the panels for true 720p. On the other hand, other competing TV technologies like Plasma were almost always true 720p because they had to build brand new manufacturing lines for these new technologies, while LCD just adapted the existing market based on the PC monitor market. 1080p panels on the other hand should have often been true 1080p. I'm assuming 1080p downscaling came to being just because 720p and 1080p were the two common competing HD standards, so it was seen as a useful feature to be able to accept and downscale 1080p signals. Some 1080p TVs few years back and current PC monitors do offer 4K downscaling as well. Although, the side effects of 1080p scaling were a bit varied. My friend has a "720p" Panasonic LCD screen which still looks surprisingly decent, although it's not too bright. It can downscale 1080p, but for some reason that makes the picture look much darker, kind of like it's crushing blacks or something. When 4K started becoming a thing, PC monitors were more focused on ultrawide and such, or 1440p at most, so the manufacturing of 4K LCD panels probably experienced something kind of similar to what Plasma experienced, so new tooling had to be made which ensured that the panel resolutions are exactly as advertised and not some close approximation. There are sharpness differences between modern 4K TVs based on a few factors. If watching non native resolution content, upscaling is obviously one factor, but panel pixel structure can affect clarity a bit, and some higher end TVs with wide viewing angles layer stuff (used by Sony and Samsung in their high end VA LCDs at least) can also affect the apparent sharpness of the picture. The classic pixel structure of LCDs would be reasonably square sub pixels next to each other in a Red Green Blue order, while a lot of the more recent 4K TVs tend to use Blue Green Red, which can affect the clarity of text and finer detail in desktop use for example. I don't think many modern TVs use any weird sub pixel structures aside from the order of the sub pixels being different. I know Samsung's current QD-OLEDs use a triangle formation, and I recall one of my old Android tablets from 2012 also used some sort of triangle formation with an LCD screen, but I haven't heard of recent 4K LCD TVs having stuff like that. I have a hunch that LG's LCDs also used to use WRGB panels some years ago, which has some ups and downs but could also affect clarity of the picture negatively. The idea was that the total number of pixels on those WRGB LCD 4K panels should be the same as on RGB/BGR LCD 4K panels, but the extra white pixels would take extra space away from other sub pixels and limited the amount of full color pixels you could have, making approximation of well defined lines and colors hard. Some people were flipping their shit over that, saying these TVs weren't "true 4K", since if you just counted how many full color pixels you would get from all the red green and blue sub pixels, the resolution would be more like 2.7K or something, but a black and white image could technically be 4K. Or, you have 4K worth of pixels but "color resolution" was lower and would smudge the overall picture sharpness to some degree. Thankfully LG dropped those panels from their LCDs last I heard, and other mainstream manufacturers never used them, or used them very briefly. I think the OLEDs with WRGB have the white pixels in addition to all other sub pixels, not in place of another sub pixel like with the older LCDs.

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samsung.com › home › tvs › tv buying guide › what size tv should i get

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