What does Refresh Rate meant for LED TVs.
Refresh rate is the number of times your TV can display images in a span of a second. Its unit measurement is Hertz, creating your labels 60Hz, 120Hz, and your 240Hz.
It is the standard refresh rate for your average TV. While a 60Hz is already proven to be a good refresh rate, it still has to show 24fps and 30fps videos at 60 times per second. This means that it has to be evenly distributed, and at 24fps and 30fps this can now result in some artifacts (display may have blurred images).
(-)3D content incapable
(-)May have motion blur and motion artifacts
All the low-end models like TCL, Micromax, Mitashi, Sansui, etc.. come with 60Hz.
At a 120Hz refresh rate, this would now mean that your TV can display 120 frames per second. It may seem a lot of frames but with a method called MEMC, it’s basically a 60Hz that’s tweaked.
3D content capable & Smooth motion with the probability of motion artifacts.
Most of the Sony, Samsung, LG and Panasonic comes with 100Hz
A 240Hz TV is supposed to display 240 frames per second, and it does in a way. With methods like the MEMC and Scanning Backlight, it doubles the rate of a 120Hz. With MEMC, instead of producing a single extra frame, it now produces three extra frames. Scanning backlight on the other hand, uses a backlight that’s rapidly flashed to produce extra frames.
-Expensive, 3D content capable & Smoother motion with the probability of motion artifacts
-Some Panasonic models comes with >240Hz
In the same way as your 120Hz, it syncs well with 24 and 30 fps with no trouble. It would also mean that your display would show less blur and be smoother.