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Will the new iPhone use 120Hz high brush? The key depends on the screen

via:驱动之家     time:2021/2/8 15:23:53     readed:643

After the release of the iPhone 12 last year, the new generation of iPhones didn't use the high refresh rate, and the screen became a slot.

As we all know, the introduction of 5g chip into iPhone 12 has a certain impact on the battery life of mobile phones. Will the next generation of iPhone 13 (or maybe iPhone 12s) adopt it?

After all, in the last two years, the use of high refresh rate screen has become a selling point of smart phones, which has been highlighted by major manufacturers.

A higher screen refresh rate also brings a smoother experience to the phone. One of the reasons why the iPhone doesn't use high refresh rate screens so far is that it can't maintain its battery life.

An ideal solution for ltpo OLED screen to maintain high brush and endurance

One of the reasons why high refresh rate is not popular in smart phones is that improving the refresh rate of the screen will directly affect the battery life of the mobile phone.

So manufacturers are equipped with this function in flagship products with better performance and larger capacity batteries.

However, the progress of science and technology has achieved a balance between high refresh rate and endurance,At present, the OLED screen with ltpo is an ideal solution.

Apple has already used the ltpo screen on the apple watch 4 and apple watch 5 smart watches in order to increase the endurance.


The so-called ltpo technology is a new screen backplane technology. Compared with the ordinary OLED panel, the advantage of this technology is that it can dynamically adjust the refresh rate, so that the screen can be flexibly switched between 1Hz and 60Hz, so as to achieve the purpose of reducing the screen power consumption.

For OLED screen, the driving of LTPS is essential. As a current driver, high mobility TFT device must be realized to achieve better driving. At the same time, the capacitor must be small enough to ensure high refresh rate and resolution.

But power consumption is always a big problem in LTPS. Because of the self luminous characteristics of OLED, all OLED pixels will be turned on in all white environment, which increases the power consumption.

andLTPS needs constant charging to maintain the potential in the capacitor, so it can not achieve low-frequency driving, which leads to the problem of increasing power consumption at high refresh rate.

However, with the development of technology, the improved ltpo can solve this problem.

In this technology, LTPS and oxide are placed in one pixel, so that LTPS can be used for display driver and oxide for switch. In this way, two kinds of drivers can be inherited in one pixel. The new technology combines the advantages of strong LTPS driving ability and small leakage of oxide process.

In this way, the power consumption of the screen can be effectively controlled and the balance between the two can be achieved under the condition of improving the refresh rate.

I believe some people will ask, since it's such a good technology, why doesn't Apple use the iPhone?

One of the important reasons is that the previous ltpo technology screen has a disadvantage, that is, the larger the screen size, the worse the display effect. Therefore, for apple, which pays special attention to the user experience, it is not a wise choice to sacrifice the user experience for the refresh rate.

However, the problem of ltpo's poor display effect on large screen may have been solved. Samsung S21 ultra 5g, which is launched this year, has already used this screen.

After the evaluation of colleagues in the mobile phone department, they said that this screen has the top visual effect. Thus, the biggest shortcoming of ltpo has been solved.

From various perspectives, the ltpo screen, which can maintain a balance between endurance and high refresh rate, is indeed an ideal solution.

It's important to enhance the sense of experience

From the hardware point of view, it has been able to take into account the high refresh rate and endurance of the screen, but an important reason for whether a high refresh rate is needed is whether we can improve our sense of experience.

At present, there are more and more use scenarios of smart phones, including reading novels, browsing information, playing games, watching videos, brushing microblogs, circle of friends and so on.

Whether 90hz or 120Hz can bring better experience in these common scenarios of mobile phones is questionable.

For example, when we read novels on our mobile phones,Because the text presented in the novel needs the readers to read slowly, the advantage of high refresh rate and fluency can not be presented, which is the same effect on social apps such as microblog and wechat.

In addition, when watching the video, because the current video itself does not support 90hz and 120Hz, its effect can not be presented. And video in the high refresh rate is not necessarily able to improve the visual sensory effect.


Although 120Hz is clearer and smoother, it lacks texture

One of the reasons is that the picture is too smooth and clear after improving the frame rate, which leads to the lack of texture of the film. In addition, some viewers said that they would have dizziness, dizziness and other discomfort when watching.

Therefore, in the high frame rate environment, it is important to improve the user experience.

However, fluency is closely related to the number of frames. In the game field, the higher the number of frames, the smoother the picture.

In the next generation of games, 90hz and 120Hz bring smoother game experience. In racing, shooting and action games can play an advantage.


The performance of ltpo screen needs the support of hardware and software to play a reasonable effect. For example, the 60 Hz display can only be displayed in the form of 30 Hz. In this case, when the screen is stuck, it can not show the advantage of dynamic variable refresh rate.

Apple seems to have found a good solution to this problem. On the iPad pro of iPad pro, the self-adaptive refresh rate technology can be displayed at different refresh rates on one screen.

Foreign media once conducted an experiment to display an application and play a 24Hz movie on the main interface of iPad. Results there is no conflict between the sliding of video and interface, which ensures the smooth operation of each.

It can be seen from this case that Apple has designed an ideal solution for variable refresh rate, which may also achieve a good effect on ltpo OLED screen.

The high refresh rate of mobile phone screen is bound to become the norm in the future. In addition to the improvement of hardware performance, the supporting ecology also needs to be established.

Ecological building is very important

In order to give full play to the performance advantage of high refresh rate of mobile phone, based on the good experience of users, the most important problem to face is the supporting software ecology.

In addition to creativity, the huge software ecosystem that Apple has built is also the key to success.

There are not many applications of 90hz and 120Hz in mobile applications, so there is a reason why iPhone still insists on 60Hz.


In the game industry, it has gradually adapted to 90hz and 120Hz, but only "peace mission" and "QQ flying car" are supported, and most of them are still hovering on 60Hz or even 30Hz.

Another point is the restriction of mobile phone performance. Many mobile phones are currently running some large mobile games with the highest image quality, and the frame dropping problem will appear as soon as the running time is long. For high refresh rate, this kind of situation is more likely to occur.


However, in some applications that we use on weekdays, there are not many applications that support 90hz. One is that developers don't think it's necessary. In addition, it doesn't necessarily bring obvious advantages in experience.

So it is very important to establish a software ecosystem.

Of course, once Apple adopts a high refresh rate screen in the next generation of mobile phones, it can use its own appeal to let developers make adaptations and changes.

I believe that the two camps of IOS and Android will continue to invest in the future to promote the maturity and popularization of ecology.

If the next generation of iPhone supports high refresh rate, will you look forward to it?



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Link to the original text:Pacific computer network

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