These days, almost all mid-range and flagship phones use high-refresh display displays. Such a feature looks great on paper, and this is another feature that manufacturers use to increase the distinction between phones. But when buying a phone, should you prioritize refreshing the display? In answer to this question, we must say that it depends.
Many users are not very familiar with how the screen refresh rate works and its benefits. Although more content and games are displayed more smoothly as refresh rates increase, this smoother leads to reduced battery life. Here's everything you need to know about screen refresh rates.
What is refresh rate?
All pixels on the display are constantly updated to display the latest content provided by the processor. But this is not done by chance. Panels update their content at regular intervals, known as refresh rates. refresh rate or refresh rate is the number of times a monitor image can change per second and is used to measure that unit of Hz.
This means if the monitor is based on a 60Hz refresh rate Yes, it can be updated 60 times per second, and 90 Hz means 90 updates per second, and so on. Also, as the refresh rate increases, the latency decreases. For example, it takes 16.6 milliseconds to fully update a 60 Hz display, and this time is 11.1 and 8.3 milliseconds for 90 and 120 Hz displays, respectively. It should be noted that the refresh rate display is not the only factor in the delay, but it plays the most important role.
Many users think that all pixels are updated at the same time, but this is not the case. Instead, each horizontal row of pixels does so individually, so if you shoot in slow motion from the phone screen, you can see it. Also, when you look at the screen through the phone's camera, you will see an image jump, which is also due to the same update of the horizontal strips of pixels.
In this regard, we should also mention the touch sampling rate, which is a The criterion is relevant but different. Hertz is also used to measure this characteristic, and is simply the number of times the user's touch is detected by the display per second. The higher this number, the faster the touch detection speed, resulting in a shorter distance between the touch and the task at hand. This feature is especially important in games with fast rhythms.
What do the numbers 60, 90 and 120Hz mean?
High-refresh-based displays make content types smoother and more attractive overall. Even simple tasks like checking emails and browsing Instagram are more fun with high-refresh screens. Although for everyday tasks such features do not change the user experience, in any case we can not hide its benefits, especially for tasks such as watching videos and playing various games.
However, we should note that most Videos play at 24 frames per second, which means 24 Hz. For this reason, the monitor must either adjust its pixel update speed to this number or increase the firmware. Currently, almost all 120Hz displays can adjust the pixel refresh rate to 60, 30, and 24Hz, which is well-matched to 24fps.
As we said, high-refresh screens are also very attractive in gaming because they reduce the visual latency of games and display them more smoothly. Gamers who use computers are usually very interested in using 120 and 144 Hz monitors. Now most smartphone users can experience the same advantage with their phones. However, in order for the game's firmware to match the screen refresh rate, a powerful chipset must be used. In this regard, we must point out the difference between the concept of refresh rate and firmware. refresh rate is the number of times the images displayed on the screen can be changed; But a firmware is the number of frames or images that reach the monitor per second.
However, a high display refresh rate increases battery consumption. When answering The faster the display, the more pressure the CPU and GPU will put, and all of these factors will reduce battery life. In this regard, we can mention the OnePlus 7 Pro, which if the 90 Hz display mode is active, the battery life is about 200 minutes less than the 60 Hz display mode. On the other hand, we should mention the 9% difference in battery life of the Galaxy S20 Ultra in the 60 and 120 Hz display mode. However, some newer phones feature variable rate refresh, which plays a significant role in reducing battery pressure.
Variable rate refresh
Due to the negative impact of high refresh rate on battery life, a useful technology to answer this problem it is developed. Some phones now use LTPO displays, which enable variable rate refresh. Although there are differences between LTPO displays, in general, different companies in their advertisements claim refresh rates ranging from 120 Hz to 1 Hz. But in reality, almost all of these monitors can reach a minimum refresh rate of 10 Hz.
Simply put, these types of monitors change their refresh rate according to the content being displayed. For example, if a user is viewing a photo, the screen refresh rate is minimized, and when you swipe on the screen, the refresh rate increases rapidly to take advantage of this feature.
Among the phones that use LTPO displays, we can mention the Galaxy S22 Ultra and Oppo Find X3 Pro. Samsung has also taken a new approach to the Galaxy S22 and S22 Plus. The minimum refresh rate of the display of these two phones is 48 Hz, but the connection speed between the processor and the display is also reduced to 10 Hz, which to some extent leads to a reduction in battery consumption.
Should a Buy a phone with this feature?
90 and 120 Hz displays now They are no longer used only for flagship phones, and many low-end and mid-range phones also have such displays. However, refresh rate is only one of the features of the display. Therefore, if your screen is using high refresh rate, this does not necessarily mean high quality. When buying a phone and reviewing the features of the display, you should pay attention to such things as color gamut, contrast, maximum brightness, HDR capabilities and resolution.
However, users who have used displays based on high refresh rate, Usually they can no longer use screens that do not have this feature. But as we said when looking at the phone screen, pay attention to other features besides refresh rate.
- Everything you need to know about the phone screen; Panel type, refresh rate and
Source: Android Authority