Hi,

I bought P55-F1 and found out that any span of moderately lit color is filled with chessboard-like pattern instead of uniformly. I asked a question about this here https://electronics.stackexchange.com/questions/401617/lcd-pixels-how-chess-board-pixel-fill-patterns-are-called , you can see my images and explanations. My room is not very big, so I am frequently walk by working TV, and this chessboard pattern irritates me a lot. I tried all kinds of content, and it always there, except for bright-white spans or tiny details like computer text. I feel like I am being robbed of my 4k, as TV constantly tries to shut half of the pixels, at least locally.

Today I went to BestBuy again, and found that P65-F1 (the one that on display) doesn’t have this effect, P55-F1 on display does (it is mounted to high to be sure). Here are my photos from the store. They have different brights, that is because p55 is way up higher then P65. https://imgur.com/gallery/Bt3bQp4

all Samsungs I checked have this effect and all Sonys and LGs (both OLED and LED) don’t have. I am still in the range of returning it, but I am unclear on what to take instead. I need tv to play Nintendo Switch, Playstation 4 PRO, some streaming movies, possibly some blurays.

Can you comment on my concerns? How can it happen that P55 and P65 have significantly different matrices? What is that effect for, and what does its existence mean? Effect is not visible on edges and tiny sharp details, but if it is used to achieve wider color gamut, does it mean that if it is not used on sharp details, then those details are impaired in color gamut? If effect is used on big fills of the same color, am I right that this effectively lowers resolution of those big fills to 2k? What are true bitness of pixels of P55 and P65, is it different for them? You mention that you consider an 8bit panel with dithering a 10bit panel, as long as gradients look nice.

You labelled P-series as a good TV with specific score, did you reviewed specifically P65, or all 3? Would you still recommend P55 on the same level of certainty as P65?