Rewrite the Technological Landscape

On August 5, the ZTE press conference came.

ZTE is known as a model madman. As a brand with a large number of historical models, ZTE did not disappoint this time. A press conference directly launched five ZTE V series, Q series, X series, Blade series, and open series. series mobile phones.

This is also the style that ZTE has always maintained. It is as if it is sorry for users if it does not present three series of guarantees in a press conference.

Up to now, ZTE has launched 15 series, which is the most series among all smartphone brands. At first, everyone thought it was very messy, but gradually began to accept ZTE’s "personality". Looking forward to how many new models ZTE can come up with this time.

The prices of the five series of mobile phones this time range from 599 to 1999, basically covering the main price ranges of low-end to mid-to-high-end mobile phones.

Among them, the Blade series and the open series use Hongmeng processors, one is M3 and the other is M2, and the rest are Qualcomm processors.

The system is all Vientiane, and the Samsung next door is most concerned about the screen. As a result, the screens are all LCD screens, and even mid-to-high-end phones do not use AMOLED screens.

But Samsung is not without discovering something special, that is, ZTE's mid-range and mid-to-high-end phones use LCD screens from Dafeng Sony Optoelectronics.

Dafeng Sony Optoelectronics is a very mysterious company jointly established by Dafeng Group and Sony in 2008. Both parties hold 50% of the shares of this company. It was very low-key when it was established. It was simply interviewed that it was to further promote the screen. Technological development.

After that, it almost never appeared again, as if there had never been such a company in this world. Until today, 2 years later, everyone finally heard the name of this company again, and many people said they had forgotten it.

At this time, Li Runyu was already sensitively aware of something.

In the next period of time, companies such as Meizu, Coolpad, and Gionee held their own press conferences one after another, basically launching three mobile phones with prices ranging from five to six hundred to two thousand.

The common point of this batch of mobile phones is that the low-end phones are basically LCD screens of Dafeng Group, and the mid-to-high-end phones are basically LCD screens of Dafeng Sony Optoelectronics.

Another thing they have in common is that Chinese mobile phone manufacturers are starting to rush out at an accelerated pace. This time, the new mobile phones are not for the Chinese market, but for the global market.

As time went by, when more and more users from all over the world used these phones, a topic gradually became hotter.

Especially at the Huawei press conference at the end of August, Huawei directly opened up this topic in the friend business link.

Huawei has launched three series of mobile phones, Honor Changxiang, Honor Youth and nova this time, and in the friend business link, Huawei directly named Samsung's Super AMOLED screen.

"We can see that the Samsung Galaxy S will have uneven white display and color cast. Recently, many Samsung users have been discussing this issue on the Internet.

In fact, in principle, it is because the Samsung galaxy S uses DC dimming, but in fact, the OLED screen and DC dimming are not completely compatible.

DC dimming is suitable for matching LCD screen. "

Huawei directly named Samsung, which made the issue of Samsung's screen problems immediately exploded after the press conference.

In fact, the Samsung Galaxy S used to have this screen problem, but Samsung’s brand power was there at that time, and Samsung was the leader in AMOLED, and it didn’t even have a decent competitor. Although the screen had flaws, it was not so obvious. Users I can't figure it out either.

After two years, when AMOLED screens become popular and users pay more and more attention to screens, this problem has been solved.

But in this life, Samsung has the Dafeng Group as a competitor, and even became a follower of the Dafeng Group. At this time, if you have a problem with your product, it is not easy to fool around.

After all, in order to compete with Dafeng Group, Samsung spends money every day to promote that Super AMOLED is better than the ultimate screen, and every day it is said that Super AMOLED is the top screen.

Samsung Electronics called an emergency meeting.

"Why doesn't Super AMOLED have an extreme screen?" When Li Runyu saw that netizens were pointing out Samsung's screen problems, his first reaction was naturally to see everyone's views on the extreme screen.

It turned out that everyone said that the extreme screen did not have this problem.

"We saw the introduction of the extreme screen, and the PWM dimming used by the extreme screen."

"PWM dimming?"

"Theoretically, because OLED has the characteristic of self-luminescence, if the voltage is lowered, there will be color cast, and it may even fail to light up, so the most practical way may be PWM dimming."

"Then why did you choose to use DC dimming?"

"Theories are just theories." The R\u0026D staff also expressed helplessness, "Many theories have to be tested by the market to know whether they are right or wrong.

Except for Dafeng Group, there is no company in this world that seems to know the direction of the market without market inspection.

And when we were studying PWM dimming, we also found problems. "

"what is the problem?"

"Although theoretically, we can control the PWM dimming flicker frequency within 400Hz, it should be harmless to the human body.

However, during our experiments, we noticed that the actual feeling of the human eye is somewhat uncomfortable, especially for people with visual sensitivity, and although there is no theoretical basis to prove that such a frequency will be harmful to the human body, the phenomenon of eye fatigue can be used. Not uncommon.

So we gave up the direction of PWM dimming at that time. "

After Li Runyu understood it, he immediately asked, "Then there should be some users who feel uncomfortable in their eyes after using the extreme screen?"

"Yes, you can indeed see people talking about this on the Internet."

Li Runyu couldn't help frowning, "So the direction of PWM dimming is also wrong?"

"Well, it depends on how the company handles it."

"What do you mean?" Li Runyu was puzzled.

"Although some people on the Internet are talking about the eye fatigue caused by the extreme screen, more people don't really mind it, because Dafeng Group has done a very important thing and said it first.

This problem is directly mentioned in the instruction manual of Hongmeng 4 and the user rules of Hongmeng 4. According to the description of IEEE PAR1789, the flicker frequency of PWM dimming with low risk of affecting human health should be at least above 1250Hz, which will basically not affect human health. The PWM dimming flicker frequency should be above 3000Hz.

However, the PWM dimming flicker frequency of the OLED screen of the Hongmeng mobile phone is only 300Hz, which is far below the health allowable range described in the IEEE literature.

However, IEEE PAR1789 refers to the lighting source, but whether it is a lighting source or a screen light source, they are essentially the same thing, so this matter itself is really difficult to explain clearly.

It can only be said that there is currently no accurate theory to support that OLED screens are harmful to human eyes. Even so, Dafeng Group took the initiative to propose that some sensitive people would experience discomfort on the OLED screen during the experiment, reminding users that if they feel uncomfortable, they can choose to return the product within the return period.

In addition, in order to avoid the damage of the mobile phone to the eyes, Hongmeng 4 has many reminder functions. For example, if the mobile phone is used for more than 2 hours, the mobile phone will pop up a rest reminder. When the user uses the mobile phone in a dark environment, the mobile phone will remind the user that it is best to turn on the light. , In addition, when the user lowers the brightness, Hongmeng 4 will also remind you to avoid using the phone with low brightness for a long time, because PWM dimming will cause more serious flickering at low brightness.

You know, most users are actually not sensitive to this thing. If you don’t tell them, they don’t feel it at all, but Dafeng Group still chooses to tell everyone about an unconfirmed risk but a hidden danger. One point is very smart. "

At this time, people in Samsung felt that Dafeng Group was smart in doing so, but in the past, Samsung, as the leader of OLED, could have done the same, but it just didn't do it.

In the past, Samsung relied on the theory that it was harmless and only pretended not to know about it. As this person said, it is only a small number of users who are sensitive to the screen. He can't feel any difference between the OLED screen and the OLED screen in front of him.

Therefore, for such a small-scale matter with no theoretical support, taking the initiative to say this matter has become widely known. There must be some users who choose LCD screen phones because they are worried that OLED screens will hurt their eyes. what to do.

But Meng Qian is willing to do this, because Meng Qian always believes that users have brains and judgment. If you make things clear from the beginning, they will judge.

And even if this is a defect of OLED, the advantages of OLED are obvious. Give the rights to users and let them make their own choices.

After all, the most important reason why mobile phones hurt your eyes is because you play for too long.

In the face of Meng Qian's "self-explosion" behavior, Samsung has nothing to do with the ultimate screen at the moment, but can only find a way how to deal with the public relations problem of Super AMOLED.

And at this time, Dafeng Sony Optoelectronics suddenly said that it would hold a press conference.

Thanks to Mr. Lan for the reward! Thanks to the gods who are the authority dogs for their rewards!