The root cause of iPhone's choice to be released in the fall

As we all know, Apple releases digital iPhones every fall. In fact, since the iPhone4 was released in the summer on June 8, 2010, all genuine iPhones have been released in the fall.

The author will tell you that the root cause of the flagship iPhone released in the fall

screen brightness reduction

iPhone12/12 mini full screen brightness can reach up to 625 nits, while iPhone12 Pro/12 Pro Max full screen brightness can reach up to 800 nits. But this maximum brightness can only be achieved when the machine temperature of is lower than that of . Under the condition of high body temperature, the screen brightness of the iPhone 12 series cannot reach 400 nits, which is why after the outdoor mobile phone is hot, the mobile phone screen is often too dark to see, and manual brightness adjustment cannot be improved.

This protection method to reduce the brightness of the screen is the setting of the bottom layer of the system. No matter how the brightness adjustment is set, the maximum brightness of the screen cannot be used under high temperature conditions.

In order to make the first purchase iPhone users do not use the screen brightness as the reason to return and exchange after sale, the iPhone must be released in the autumn, and the cold winter can ensure the normal use of the iPhone. The performance of

deteriorates as soon as it heats up.

Every year, the iPhone is equipped with the A-series processor with the strongest performance of at the same time as , but can such powerful performance really be used? In fact, it is not. The performance release of iphone also requires high temperature. .

iPhone's performance scheduling strategy is relatively aggressive. Even in daily sliding screen, playing system transition animations, etc., iPhone will unreservedly schedule the processor's peak performance, which is why the transition animation of iOS is so smooth one.But also because of this, in order to protect the components in the mobile phone whose service life is greatly affected by temperature, such as the battery and the screen, the temperature protection strategy of the iPhone will be activated when the body temperature is high.

When the body temperature becomes high, iPhone will forcibly limit the peak performance of the processor , that is, "frequency reduction", in order to protect the service life of the phone. This is also because once the iPhone plays games for a long time or uses it with high intensity, the mobile will become stuck, and the background application will be more likely to be forced to quit.

Also, in order to prevent first-time iPhone users from returning after-sale due to poor mobile phone performance and frequent freezes, iPhones need to be released in season when the temperature is lower.

Body heating video recording pulls the hip

The iPhone's video recording specification is extremely powerful , capable of recording 4k60fps HDR video, in fact, the HDR recorded by the iPhone is through the exposure time different two frame picture algorithm stacks, respectively take the highlight part Combining it with the dark light part can achieve such an excellent dynamic range. Therefore, video recording requires extremely high performance. .

And in the summer, there will be many user feedbacks, recording a video for a while, the iPhone starts to report that the temperature is too high , and there are problems such as dropping frames and . This problem of limited recording video performance due to heat is less likely to occur in cooler seasons.

This is also the reason why the iPhone is released in the low temperature season. Whether it is the evaluation machine sent to the media or the machine purchased by the first user, it can achieve the video shooting performance announced at the conference, so as to ensure the reputation of the iPhone.

The purple iphone released in spring has many bad reviews related to fever

So people often say that my iPhone is good when I buy it, because the flagship iPhone is basically released in autumn, and it can help the phone to maintain a low temperature throughout the winter. In the summer of the second year, there are many after-sales mobile phones, and there are many people who say that the charging is hot, there are many people who say that it is very hot to wear the case, and there are even many other problems.

chose to release in the fall, precisely because the current iPhone does not have enough heat.