Maintain the battery life after the screen is enlarged.

LTPO is a new screen backplane technology in the industry. Compared with another OLED backplane technology, IGZO, it can dynamically adjust the refresh rate of the screen, and can even flexibly change between 1Hz and 60 Hz, thereby reducing screen power. Consumption.

And the real maturity of this technology on Apple Watch will have to wait until Apple Watch 5. In the previous evaluation, we mentioned the answer of Apple engineers:

In addition to LTPO itself, this function also requires the cooperation of subsystems, including the driver and power manager, which have been redesigned on Apple Watch Series 5.

This is the “Always On” function on Apple Watch 5, and the battery life will not crash.

The reason why Apple did not apply this technology to the iPhone as soon as possible is not due to Apple. In Samsung, as a new technology, the effect and yield of LTPO on large screens were not very good before, even if Apple wanted to use it. no way.

Here you might think of the iPad Pro, which also has a high 120Hz refresh rate and a dynamically variable refresh rate, even with a larger screen. But don’t forget, use on iPhoneElec reported that Apple will apply LTPO technology to two Pro models in the 2021 iPhone series.

The entire series of applications will have to wait until 2022, when LG may also participate as one of the screen suppliers. The LTPO OLED screen is used on the iPhone. With Apple’s consistent style, the iPad series is also very likely to be used.


The screen is an important part of flagship products

At present, the biggest significance of LTPO screen applications on mobile phones is to reduce power consumption and improve battery life, so that high resolution and other qualities can coexist with high refresh rate on the same screen, which improves the user experience.

So how does it reduce power consumption? This also starts from the meaning of the high refresh rate screen itself. Whether it is a 90Hz or 120Hz refresh rate screen, it is compared with a common 60Hz refresh rate screen.

In unit time, 60Hz screen can display 60 frames of pictures, while 90Hz and 120Hz refresh rate screens can show 90 frames and 120 frames respectively. The amount of content displayed per unit time increases, and the pause decreases, so it looks smoother.

Swiping is one of the application scenarios that best reflects the advantages of high refresh rate screens. Picture from: Sharp

But obviously there are many application scenarios in addition to sliding in the process of using mobile phones. Do they all require a 90Hz or even 120Hz refresh rate? The answer is obviously no.

For example, when watching a video, the video content itself does not support 90Hz or even48672.jpg?imageView2/2/w/1000/format/jpg/interlace/1/q/85″ data-w=”1000″ data-h=”707″>

Another problem is the limitation of mobile phone performance. As we pointed out in our previous article on the Xiaomi Mi 11 game test, it is inevitable that we will encounter frame drop if we run “Yuan Shen” at the highest quality for a long time. High 90 or even 120 frames.

This is not to deny the experience improvement brought by the high refresh rate, but its customized meaning is stronger than the universal meaning, which requires the support of more developers.

Of course, the Android camp has a certain first-mover advantage compared to iOS. After all, the Android mobile phone application has an earlier high refresh rate screen. As the ecological controller, Google has also launched a series of supporting documents.

For example, the common frame synchronization technology in games refers to the synchronization of the operation logic in the game with the operating system and display hardware. Android’s display design can avoid jitter when the display hardware switches new frame content.

At the same time, the document also mentions that a dynamically variable high refresh rate screen can further enhance the experience.

Picture from: Tech talk