Smart TVs Are Divided Into 4K, 4S, And 4A

4K, 4S, and 4A are not the same concept.
1. 4K resolution is a pixel resolution of 4096×2160, which is four times the resolution of 2K projectors and high-definition TVs. It is an ultra-high-definition resolution. At this resolution, viewers will be able to clearly see every detail and every close-up in the picture.
2. The difference between 4S and 4A is the different models of a certain TV brand.