When the smart projector was born with the visual impact of a 100-inch screen, the entire home entertainment display market was excited and excited. Compared with televisions, smart projectors have many innate advantages. The innate big-screen giant screen, rich entertainment content resources, more kinds of application scenarios, coupled with the very close to the people's prices, these advantages make the smart projector is like a "pig on the wind."

Since 2014, the smart projection industry has become bustling. First, there was a pole meter that received A round of 100 million yuan in financing, followed by a nut-projection to obtain A round of financing, which was jointly funded by Li Bingbing, Huang Xiaoming and Ren Quan. By 2015 and 2016, the financing of rice and nuts also went to the C round, and both claimed that the financing amount totaled several hundred million yuan.

Let's look at the sales growth of smart projection. From 500,000 units in 2015 to 1.5 million units in 2016, the average growth rate has remained above 45% for consecutive years (data source: Zhongguancun Online). Many emerging brands have mushroomed. Sensitive Internet brands also entered the market. Following Lenovo and the Little Whale, Ali also launched the “Tmall Magic Screen” in August this year.

For a time, the smart projector won the limelight.

As a senior digital control and intelligent projection enthusiast, Xiao Bian also started with a certain meter of 1080P smart projector. The products I received at the weekend just brightened me up. The 100-inch giant screen was accompanied by the sound of Harman Kardon. The living room immediately became a movie theater. Xiao Bian could not help but excited and found a blockbuster "Braveheart" that had been trying to revisit. Turn the lights off and plan to enjoy a pleasant weekend.

What I never thought of was that after watching for about half an hour, the projection screen did not even know when it became obscure. It was necessary to refocus to restore clarity. Reluctantly I was trying to figure out whether it was a machine problem or a problem I played myself. I watched and dunked for 2 hours, but each time I turned on my computer, my screen became blurred again after about half an hour, and I had to refocus more than once. In the course of the next few days, Xiao Bian found that when playing PPT, the situation was even more pronounced. The text on the document was like a long hair, and it also had ghosting. It felt like the eyes were covered by a mist.

Xiao Bian first read the product manual, but did not mention this phenomenon. After consulting the after-sales customer service several times and getting a reply that “this is a 'normal' phenomenon that cannot be resolved”, I had to apply for a return. However, in the interpretation of the customer service customer's flashing words, what is hidden behind it? During the investigation, the author discovered that several of my peers and friends also bought several brands of smart projections. During the process of use, they all had this “normal phenomenon”, and often the merchants did not give returns based on the “normal phenomenon”. As a born digital madman, Xiao Bian wants to break the casserole in the end and find the reason behind this.

Fortunately, Xiao Bian had friends inside the projection circle. After consulting with several experts in the intelligent projection industry and consulting a large number of technical documents, it became clear that this phenomenon was called “thermal defocusing” in the smart investment instrument. .

"Thermal out of focus" refers to a slight offset of the focal length of the lens caused by the heat generated by the light engine during the operation of the projector, resulting in the original clear picture being blurred due to the focal distance deviation. This is a congenital defect and cannot be avoided. As long as it is a projector, there must be a phenomenon of thermal defocus, but the degree is different. Traditional projectors have a relatively long distance between the light engine and the lens, and they have a large body and a large cooling fan, so the thermal defocusing is not so obvious; while the smart projector is smaller, the lens and the light source are closer, and the thermal defocusing This malady has become very prominent, especially with the lens of the resin lens, which is almost non-thermal defocused.

After discovering this terrifying flaw behind the smart projector, Xiao Bian’s enthusiasm for scientific research rose up. He intends to expose the industry's ills of the smart projector and also the consumer’s right to know so that this “flying pig” is also awake. Calm down.

As a result, Xiao Bian found the mainstream smart projector products available in the market, and made pro-tests on a section-by-section basis.

Method: All connected to the power, open the highlight mode, within 2 hours, play the same Word document (this method or the industry told me, said that this can be more to find the virtual focus of the screen severity), waiting About half an hour, record the sharpness of the document projection screen, become blurred, and then adjust the observation record.

Let's talk about a certain 1S of a certain meter. When the project plays a document for 20 minutes, the picture begins to blur, but it can also be seen clearly. The impact is certain and not too large. I restart the focusing and play for 15 minutes. Left and right, the screen is blurred again.

A certain MI 1S played 20 minutes later

A certain meters 1S reboot and then played 15 minutes later screen

The second machine is a certain C of a meter, and the projection of the above test comes from the same company. When I played the document for about 16 minutes, the picture began to blur, and what surprised me was that the degree of ambiguity was beyond my imagination. I couldn’t watch it without focusing.

A screen of a certain meter after being switched on is adjusted

When a C of a certain meter plays for about 16 minutes

The third part of the machine is J6 of a certain fruit. In 20 minutes, the picture becomes blurred, and the blur degree is similar to that of a certain 1S above.

J6 of a certain fruit, 20 minutes, the picture becomes blurred

The fourth part of the machine is S3, which is a cool view. Similarly, when watching about 16 minutes, the picture begins to blur, and it has been severely obscured to reach 20 minutes. It is impossible to watch without refocusing the remote control.

Somehow, when S3 watched as cool for about 16 minutes, the screen began to blur

Somehow, watching S3 in S3 was severely blurred for 20 minutes

Xiaobian also tested other micro-projection products from well-known major brands in the industry, including Taiwan and Japan and South Korea, and found that there are almost all kinds of “heat defocus” phenomenon. It seems that this is really a problem in the micro-projection industry. However, when Xiao Bian tested the product of a painting, it was found to be different. A painting is currently the main push in the market are two TT and Dawei series, just a few minutes after the start there are signs of defocus. At this moment, the screen flickers. There are four words “focus adjustment” in the lower left and upper right corners of the screen. They appear instantly and disappear. You can't see almost no time. The time does not exceed 2 seconds. At this time, the screen is restored again. .

A picture of TT, after 20 minutes of playback

TT "focus adjustment" screen of a picture captured

The picture began to blur after 20 minutes of a painting of Dawei

After a picture of Dawei's "focus adjustment" appears, the picture automatically recovers instantly.

Xiao Bian tries to contact a painting to understand this "focus adjustment". The replies received belong to one of the many projection black technologies in the picture, called “dynamic focus adjustment”, and the small editors are not aware of it.

In the many smart micro-projections pro-tested by Xiao Bian, there are “thermal defocusing” phenomenon in which the projection screen is blurred after watching from 5 minutes to 20 minutes. It is necessary to manually adjust the focus several times to maintain a clear picture. This is definitely a pain point for micro-investment pit fathers, and must be resolved. Think about who is willing to spend a few thousand dollars to buy a projection to watch large movies, and then you have to constantly focus to see! From this point of view, the dynamic focus adjustment technology of a painting cannot but be said to be another major highlight of the projection industry, completely eradicating the inherent defects of the smart projector.

I wonder if other big names in the projection industry will create the atmosphere in the industry just like the auto focus technology of a painting. We must know that today's smart phones are a group of mobile phone manufacturers who have imitated Apple and pushed it to today's scale!

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