I don’t know if my friends have noticed that in recent years, mobile phone manufacturers have become more and more interested in releasing new products together. New phones are either not released. Once released, several phones are often squeezed together to send out, extremely involuntary.
Many new mobile phones have been released in the past March.
Meizu 18 series, OPPO Find X3 series, OnePlus 9 series, Black Shark 4 and ROG 5 gaming phone series, plus the 11 Pro and 11 Ultra that Xiaomi just released a while ago, there are more than a dozen models.
It’s a greedy look at Shi Chao, and the urge to change the phone comes every day.
Fortunately, at this time, the benefits of the negative review work are reflected.
The mobile phones mentioned by Shichao have been touched by me more or less the first time, and some of them were even used by Shichao as the main machine for a few days. They really let me pass the addiction. for free!
u1s1, OnePlus 9 Pro takes pictures really well ▼
However, I don’t know if I don’t experience it. I discovered such a strange phenomenon when I experienced it. The “DC dimming” that was often used as a selling point in the past two years has now been cancelled by many manufacturers.
Regarding what is DC dimming, I believe you have more or less understood before. Simply put, there are two common dimming methods for mobile phones to control the screen brightness, namely DC dimming and PWM dimming.
The former is to change the brightness of the screen by increasing or reducing the circuit power; while the latter is to change the brightness of the screen by turning the screen on and off, so the screen will have stroboscopic flicker, which may cause discomfort to the eyes after viewing it for a long time.
This kind of stroboscopic can deceive the naked eye, so the screen is still bright visually ▼
OnePlus 9 and 9 Pro, there is no DC dimming option in the settings:
For Meizu 18 and 18 Pro, there is no option to open DC dimming in the screen settings, but you must enter the developer mode to enable it:
OPPO Find X3 and X3 Pro, the screen does not support DC dimming:
Redmi K40 and K40 Pro, there is no DC dimming in the settings:
Looking at it all the way, among the five mobile phones that the World Super League found this time, only the Mi 11 series directly put the DC dimming in the screen settings:
You know, in 2019, when OLED screens have just replaced LCD and become standard equipment for more and more flagship phones, if there is a mobile phone that does not support DC dimming, it is likely to attract criticism from netizens.
Shichao remembers that at the time, Liu Zuohu, the founder of OnePlus Mobile, replied to a netizen on Weibo that you were marketed, which caused dissatisfaction among fans:
Later, I had to come out to explain that the DC dimming was already in progress, and then I gave up.
The mobile phone screen supports DC dimming, which was undoubtedly something worth spending time focusing on at the press conference at the time.
First, the Black Shark 2 Pro used a two-page PPT at the press conference to come to the benefit of popular science DC dimming at ultra-low brightness;
Then Redmi K20 Pro also announced the use of DC dimming:
Soon OPPO Reno followed suit and made a DC-like solution:
Vivo, Huawei, Honor and other mobile phone manufacturers have not been idle, and have successively added DC dimming mode to their mobile phone settings.
It can be said that if an Android machine with an OLED screen did not have DC dimming at the time, it could not be regarded as a flagship; many people also took DC dimming into consideration when buying a mobile phone.
So why several of the recently launched new machines have canceled the DC dimming by coincidence. After all, when the manufacturer was promoting the DC dimming, they claimed that it has an eye protection function. Isn’t it canceled now?
The reason is that Shichao believes that the reason why mobile phone manufacturers cancel DC dimming has to be attributed to the light-emitting characteristics of the OLED screen itself.
Shichao said earlier that OLED’s PWM dimming changes the brightness by alternating the on and off of the screen, during which the screen actually flickers all the time.
The longer the duration of the off-screen state, the lower the brightness; on the contrary, the longer the duration of the on-screen state, the brighter the screen will be.
If manufacturers want to achieve DC dimming without strobe, they need to keep the screen always bright and control the brightness of each pixel to be consistent.
This is easy to do for LCD screens, because LCD has a whole piece of backlight to provide the overall brightness of the screen. As long as the brightness of the backlight is controlled, the brightness of each pixel on the screen can be controlled.
And each pixel of the OLED screen emits light separately, just a 1080P resolution screen, its pixels as many as 2400*1080, you can imagine how difficult it will be to control.
If the pixel brightness of a certain area on the screen is not consistent with other areas, it is easy to have a color cast problem. As shown below, the screen is bright and dark, looking like a rag:
In addition, the OLED screen has been bright for a long time, and the attenuation speed of the RGB sub-pixels in each pixel is different.
It is precisely because of the inconsistency of attenuation that it may in turn further cause the color shift or even burn-in of the screen.
Even the product manager of OnePlus also confessed on Weibo that the opening of DC has brought many new problems to the manufacturer’s screen after-sales and quality reputation. This is an important reason why the manufacturer has removed this switch.
Although a mobile phone such as Black Shark that uses an independent display chip to achieve DC dimming can solve the color cast that the world said earlier, this solution also invisibly increases the manufacturing cost of the mobile phone.
In such a comparison, of course, it is more appropriate to directly cancel the DC dimming. Anyway, removing the DC dimming will not have any impact on the use of the mobile phone. The existence of the DC dimming mode will bring a series of problems.
The Nut R2 released by Hammer last year is a good example. At that time, after many people turned on the DC dimming mode of R2, the screen had the problem of blurring not long after. The key point is that this is not a single case.
However, DC dimming can’t be blamed for the appearance of the flower screen. Other mobile phones that implement DC dimming through software such as Xiaomi, Huawei, and OPPO have not experienced this problem. At most, it is just a deviation in the display.
World Super can only say that the screen quality of the JMGO R2 itself is not very good, and then the original shape is revealed after the dimming by DC.
In short, if a friend is concerned that the existence of OLED strobe may cause damage to the eyes, then when choosing a mobile phone, you have to pay attention to whether it supports DC dimming. If you don’t care at all, just treat it as I didn’t say.
If you have bought a new phone, but your phone does not support DC dimming, you can also download an app called “Screen Filter”, which can realize DC dimming by masking the screen.
Shi Chao tried it, and the effect is still good:
However, whether it is hardware DC dimming or software DC dimming is a temporary solution in the final analysis. If the OLED screen supports the overall situation, that is, DC dimming at any brightness, it will be perfect.
From now on, the phrase “LCD will never be a slave” can still linger in our ears for a long time~