Samsung wanted to announce and explain the operation of the first AMOLED panel with variable refresh rate. This technology has been incorporated for the first time in the history of the smartphone (with AMOLED technology) in the Samsung Galaxy Note 20 Ultra, and represents significant energy savings, at least on paper, compared to the current technology used in other models.
So let’s explain how variable refresh rate works, the differences it has compared to the usual one and why there is this promise that the battery will last considerably longer using this technology.
This is how the variable refresh rate works
Currently, with the rise of high refresh rates, we have mobiles with 90 and 120Hz panels. The main problem with these phones is that they use a fixed refresh rate, that is, whatever the screen content, they refresh at the highest possible rate. This is very energy inefficient, as there are many situations where we do not need the screen to refresh at a high rate. If a game runs at 60 FPS, no more refreshment is needed, if we are watching a video, neither, if we are seeing static content in Chrome or social networks, more of the same.
Although some of these terminals can disable or enable high rate based on content, this is not really a dynamic refresh rate, as it is simply oscillating between 60Hz mode and maximum refresh rate mode. With the Samsung Galaxy Note 20 Ultra, Samsung has achieved a different implementation. Specific, we have three modes: 120Hz, 90Hz, 60Hz, 30Hz and 10Hz.
Different refresh rate values for the mobile to choose the most appropriate in each situation: this is Samsung’s solution to save battery
Thus, the software decides which refresh rate is the right one at the right time. According to Samsung, this technology can save up to 22% energy compared to current panels. If you look at it, the values chosen by Samsung make a lot of sense from a technical point of view. 120Hz as maximum frame rate, 90Hz for some compatible games, 60Hz for videos and games at FPS (most of them), 30Hz for video playback at a maximum of 30 FPS and 10Hz for static content, to give some examples.
As always, it remains to be seen for practical purposes whether Samsung’s technology has hit the key or not, but it certainly represents a technical advance over the not very efficient panels of the Galaxy S20, whose energy consumption is higher than expected.
Via | AnandTech
More information | BusinessWire
Samsung announces the first AMOLED screen with variable refresh rate: this is how the Note 20 Ultra manages to be more efficient