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HDTV shopping guide!

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When buying LCD TV, ordinary consumers are easily confused by 4K, HDR, color gamut, contrast and so on. They don’t know what to buy!

In fact, LCD TV purchase is nothing more than these points:

Size: related to the display and viewing experience.

Resolution: related to TV definition.

Image quality: it is related to the restoration of the real scene.

Intelligence: it is related to whether the operation of your TV is stuck or not, and whether the expansion function is rich or not.

1、 First, size.

First point of view: don’t buy small size, as far as possible in the budget to buy large size, 55 inch start!

Large screen telepresence will be very strong. It’s cool to watch. Many people choose TV according to the so-called best viewing distance meter. The smaller they buy home, the smaller they regret not buying a large size.

Why do you suggest starting at 55 inches?

This is about the nearest viewing distance. LCD TV will have a nearest viewing distance according to different resolutions. Within this distance, the picture will have a sense of grain. Beyond this distance, you can enjoy the best viewing experience of this size.

Here is a formula: the closest viewing distance (CM) = the screen width ➗ Horizontal resolution ✖️ three thousand and four hundred

For a 55 inch 4K LCD TV, the nearest viewing distance calculated by this formula is 1.1 meters. That is to say, if you watch beyond this distance, you can get the best viewing experience. No matter in the living room or bedroom of a family, the viewing distance above 1.1 meters is absolutely guaranteed. Therefore, it is recommended that you buy at least 55 inches, and the budget is enough to directly use the 65 inch model. The nearest viewing distance of 65 inches is 1.3 meters, The telepresence effect of watching video and audio will be better.

Someone will ask, won’t 1.1 meters close distance hurt eyes?

No, now LCD TV has no short-range X-ray radiation problem, there is no staging problem.

There is no need to worry about the problem of eye fatigue. The American eye Association’s suggestion is: choose a comfortable distance for your eyes to watch TV. Even if it causes eye fatigue, a good night sleep can usually solve the problem.

2、 Let’s move on to resolution.

Preferred 4K, because the resolution is high, the definition is good.

Many people will say that now there is no 4K source, you buy 4K is useless, I want to say pure bullshit!

The picture we see is formed by many pixels. There is a dot distance between each pixel. The smaller the dot distance is, the more delicate the image is. The calculation method of point distance is directly related to the resolution. For the same size screen, the higher the resolution, the smaller the point distance.

Point distance calculation formula example, a LCD TV screen size of 300 mm × 190mm, resolution 1280 × 800, then its point distance is 300 / 1280 = 0.2344mm or 190 / 800 = 0.2375mm.

I don’t understand that the point distance is OK. We use the nearest viewing distance just now for example, the same is 55 inch TV. The closest viewing distance of 4K TV is 1.1m, and the closest viewing distance of 1080p TV is 2.24m. If it is less than the nearest viewing distance, you will feel the grainy of the picture. I asked, who do you buy when the price is similar?

A friend of mine bought 1080p TV, and said the closer and the more paste it was, it was OK to be far away. I said who would let you not buy 4K!

Of course, if you say you watch TV more than 3 meters, you can choose it at will.

3、 Talk about the quality of the painting.

The quality of TV painting is determined by color range, contrast and dynamic processing technology. The color you see with good quality has layers. The contrast between light and dark will be good, and the high-speed moving picture will not be confused.

Many of them choose and purchase popular science color domain, contrast and dynamic processing technology. When users buy, they find no eggs, and they will be more confused to choose according to popular science knowledge.

When buying, the quality of TV pictures depends on whether there are independent image processing chips. Why can Sony have no rival in quality? It is because the image processing chip is oxfork, and most TV manufacturers have no ability to develop image processing chips.

At present, besides Sony’s x1, there are Samsung 8K AI image processing chips, LG A9 image processing chips and Hisense hi view Pro TV chips, but there is still a certain gap with Sony.

In addition to the above-mentioned image processing chips, most LCD TV on the market only have ARM chip, which is mainly used to serve Android system and video decoding. Although some arm chips integrate the image quality engine technology (this is the case with Sony low-end products), there is no qualitative leap in the improvement of picture quality.

A summary of the quality of the painting.

The company pursues the quality of painting and chooses the model with image processing chip with high budget. Sony, LG and Samsung are all good.

If the low budget also pursues the quality of painting, choose the HDR model, and users of the ball game or automobile events should pay attention to whether there is dynamic compensation of MEMC, which can solve the phenomenon of high-speed sports drag.

HDR is a high dynamic range. In short, HDR increases brightness, contrast and color, improves the contrast between the brightest and darkest pictures in the picture, making black more profound, bright and hierarchical.

Although HDR and HDR content can show the best results, compared with the TV without HDR technology, the contrast and color of the TV will be better.

Pay attention to the current mainstream HDR specifications are hdr10, dobby horizon and HLG.

At present, most brands use hdr10, because this specification is free, no need for white, and there is also a selling point.

Some manufacturers do not specify which specifications to use, only write that those who support HDR do not buy. This generally only supports the input and decoding of HDR signals, but does not support HDR video screen output at all.

Once, users have feedback that HDR TV bought for Xbox one s hdr10 screen, after buying a TV, it was found that only the input and decoding of HDR signal was supported, and the individual died.

4、 Finally, I will talk about intelligence.

Although intelligent TV is all being said now, the choice of intelligence is only suitable for low and medium-end TV. Because the quality of pictures is not good for all at this price, we have to fight intelligence. Sony and LG are the main selling points of the first-line brands in the quality of painting. Sony’s smart chips are customized from the joint development department, and the performance is not different from the domestic 3000 yuan model, but this does not hinder the excellent performance of Sony LCD TV.

1. processor architecture.

At present, the intelligent TV processor is mainly dual core A73 and four core A53, the performance of both is basically the same, the single core performance of A73 is stronger, while A53 is more energy saving, which is enough for intelligent TV.

In the field of smart TV, Qualcomm does not take the same place as a mobile phone. At present, the brands of TV chips with strong hardware decoding performance include Morningstar, Jingchen, Ruixin micro, etc. Among them, Morningstar MSTAR is the mainstream brand of smart TV chip, which has advanced processing foundation for the quality of intelligent TV.

Businesses often advertise dozens of cores to attract users. This is calculated by adding various video, audio, image, multimedia, floating point, energy saving and screen control processors together. You should look at whether the CPU is a four core or dual core.

2. memory

TV memory is also divided into running memory and body content. The running memory determines the speed of data delivery, and the memory of the fuselage determines the storage amount.

If you only watch video, 1g of running memory is enough. If you like to run multiple apps with TV, 2G is recommended for running memory.

The same is true for the fuselage content. The minimum download requirements are 8g, the bigger the better, it doesn’t matter to watch video alone.

3. video resources

Many people think that they can watch a large amount of video when they buy smart TV. In fact, smart TV content services mainly include Tencent, iqiyi, LETV, mango TV and other video license providers. Most videos need members to watch, and mobile app members are not common to members on TV.

When buying, pay attention to the introduction of network resources in the details, will be written free or need to open members.

4. expansion port

Ports need to be aware of USB and HDMI interfaces.

USB focuses on whether there is a 3.0 interface. If only 2.0 is behind, the transmission speed of files and videos is slow.

It is particularly important for gamers to pay attention to whether HDMI has 2.0 interface. Hdmi1.4 interface only supports 24Hz 4K picture refresh rate, and 30 frames per second of picture quality output can not play games. However, the 2.0 interface can support 60Hz 4K resolution output and the transmission speed supports 18gbps 32 channel output.

After the introduction of the purchase, share some hot issues about TV.

1. do not over pursue the import screen.

Because the good screen quality is not necessarily good, there are LG, Samsung, sharp, Qimei, Youda, Huaxing photoelectric, Beijing Oriental and other LCD panel manufacturers in the market.

LG can say that no one has any opinion about the top two, but it doesn’t mean that LG screen is better than the quality of the picture with the Qimei screen.

For example, Sony is now recognized as the best quality of TV painting. Sony uses several panels of Qimei, Youda and Huaxing photoelectric. While millet uses LG panel. Is the quality of Xiaomi comparable to Sony?

2. where is Sony TV?

Sony’s black technology is mainly on image processing chip, which can process and repair image signals and images in signals. It plays an important role in clarity, noise reduction, color enhancement, contrast enhancement, motion compensation and so on.

At present, Sony flagship TV products are equipped with the advanced version of X1 image processing chip. The chips have three core technologies, namely, HDR dynamic item by item reconstruction technology, dual image database, 4K HDR 14 bit smooth gradient technology, which can precisely repair and optimize the color, clarity and HDR of TV.

3. is hard school better than soft screen?

There is no good or bad difference between the soft and hard screens. The physical properties of the hard screen and the soft screen are the same. As long as the impact of gravity is not used or the sharp objects are used to mark, it is not easy to damage.

Soft screen will be pressed on the screen body by hand, and the “water wave pattern” will disappear in a while, but it does not affect the imaging quality. The hard screen does not have this phenomenon.

The advantages of hard screen are wide viewing angle, fast response, no tailing of moving picture and accurate color restoration; The disadvantages are poor heat dissipation, easy reflection, color depth of field performance is not in place, adhesion is not in place, light leakage is serious.

The advantages of soft screen are good color performance, strong sense of hierarchy and good heat dissipation; The disadvantage is that the touch will be distorted, and the high-speed motion picture is not satisfactory.

So there are no pros and cons. If you like to watch high-speed sports pictures, such as ball games, car rallies and so on, it will be better to choose hardliners. There is little difference in other actual viewing.




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