How to choose smart TV
With the rapid popularization of smart phones, the traditional TV industry, an indirect promoter, has been transformed into smart TV. Like mobile phones, smart TV can install software, carry processors and operating systems, and can watch videos and play games online. How can consumers choose when facing so many options? Let's take a look at the smart TV shopping skills.
Clear your needs first
The author needs to remind consumers that color TV, as a traditional household appliance, has a long service life. When consumers purchase color TV, they need to purchase according to their actual needs. For example, if there is a large demand for Internet functions, they can purchase intelligent color TV with internet quick browsing function. If there are special requirements for entertainment functions, you can choose smart color TV with rich games or full multimedia functions.
Family advice is also important
Before we consumers buy smart TV, we should first understand the needs of the family. It is important that 'everyone in the family is satisfied', because TV can really promote family communication and communication to a large extent. Before you buy it, you must buy it according to your needs, and think about how to maximize the value of smart TV.
Select products according to actual distance
In addition to the above needs, we should also make reasonable purchase according to our viewing distance and the number of family living population. For example, if the viewing distance is 2.5m-3.5m, it is more appropriate to buy 42 inch and 46 inch color TV sets; if the viewing distance is 4m-6m, it is suitable to buy 55 inch and 60 inch color TV sets, so as to achieve better visual effect.
Can we upgrade or not
In addition, when purchasing smart TV, the strength of the brand, whether the TV can be upgraded, whether the operation is humanized and so on are also factors that can not be ignored.
Purchasing parameters of smart TV
1、4k
Reference factor: important
4K TV refers to the 3840 & times; 2160 pixel resolution TV. Its resolution is four times that of 2K TV. At this resolution, the audience can see every detail and close-up in the picture.
Whether a TV supports 4K depends on three factors: the resolution of the monitor itself, the processing power of the TV or TV box, and whether the content itself is 4K. Now 4K content is more and more abundant. It is recommended to only consider 4K when buying TV.
2. Curved surface
Reference factor: General
Theoretically, the plane is still not the most suitable shape for the physiological structure of the human eye, because the lens of the human eye is a convex lens, and the focal plane formed by the focal point is a spherical arc. The picture of watching plane TV lacks the sense of three-dimensional and presence. The larger the screen, the more obvious the distortion. Curved surface TV means that the TV screen has a certain radian, which is more in line with the visual habits of human eyes, and has a stronger sense of presence when watching programs. Just like the difference between IMAX 3D movie screen and ordinary 3D movie screen, curved surface technology is divided into original curved screen and physical curved screen technology, and physical curved screen will be the mainstream in the future.
3. Quantum dots
Reference factor: General
Quantum dots are nano materials made up of a small number of atoms. They have unique photoelectric properties. When stimulated by electricity or light, they will emit a variety of pure and high-quality monochromatic light of different colors according to the diameter of quantum dots. The back light source using quantum dots is the most pure back light source. Quantum dot TV has been improved in gamut value, brightness and true bright color.
4、HDR
Reference coefficient: weak
Is the word HDR familiar? Many mobile phones can choose to turn on HDR, that is, high dynamic range. HDR technology is applied to TV with high contrast, clear light and shade and bright color. This autumn, the high-end TV models of Samsung, LG and Sony are all equipped with HDR technology. 4K TV affects resolution, curved TV affects telepresence, quantum dot TV affects color, and HDR optimizes the overall picture. But to be honest, the perception of whether HDR is on or not is not so obvious.
It is worth noting that HDR technology is the same as 4K, and HDR technology is adopted when content shooting is needed, otherwise it is still useless. There are not many such content now, and almost none in China.
5、OLED
Reference factor: General
OLED has been publicized as "next generation display technology" by some manufacturers in recent years, claiming to be more advanced than LCD. LCD (liquid crystal display) is a boundary light-emitting technology, through a large number of light-emitting diodes distributed around the screen, light is transmitted to the center of the screen by independent wires. The OLED (organic light-emitting display) screen is composed of organic materials that can emit light when there is current passing through, and the pure color is obtained through the filter.
OLED screen has many advantages: the backlight is removed, so it is lighter and more flexible; the self illumination technology, at the same time, the black pixel does not need to be lit, which is more energy-saving; the viewing angle is larger, which is suitable for the multi angle viewing scene such as the living room; because there is no liquid crystal molecule and glass, it is all solid-state components, so it is more durable and earthquake resistant than the mainstream liquid crystal screen; the filter technology can produce Very pure color, high saturation. Because it has the advantages of low energy consumption and strong seismic resistance, OLED screen is also available in equipment other than TV.
However, the disadvantages are obvious: the biggest restriction of OLED is the high cost caused by low yield.
6、MEMC
Reference factor: General
MEMC: motion estimation and motion compensation, motion picture quality compensation technology used in LCD TV. The principle is to use a dynamic imaging system, add a motion compensation frame between the traditional two frames, and increase the 50 / 60Hz refresh rate of the ordinary flat-panel TV to 100 / 120Hz. To put it bluntly, it is to use the special chip and software technology to solve the high requirements of some special images on the refresh rate, for example, in football, it must be refreshed quickly, or there will be a "drag" phenomenon.
If you are a sports enthusiast, you can consider whether there is MEMC technology support when you buy TV.
7. Split TV
Reference coefficient: weak
Its essence is to make the traditional TV only play the role of display, not to be responsible for image processing, exchange platform interaction and other work, only the power chip and MEMC chips with display, so the screen can be ultra-thin. The "chip" of traditional TV is put behind the "host".
8、3D
Reference factor: General
What 3D means is that everyone who has been to the cinema must have an intuitive impression. 3D TV wants to achieve similar viewing experience. It uses people's eyes to observe objects with slightly different angles. Therefore, it can distinguish objects far and near and produce three-dimensional vision, separating the images seen by the left and right eyes, so that users can experience three-dimensional feeling. 3D TV is divided into naked eye 3D and glasses 3D. The former does not need to wear special 3D glasses, and the naked eye 3D technology is not mature enough. There are problems such as less viewing angles, damaged resolution, and unsatisfactory experience effect.
However, like 4K TV and HDR TV, 3D TV needs the content itself to be 3D. Now, the growth rate of 3D programs and 3D TV channels is far behind the 3D process of movies. So although the price of 3D TV is acceptable, it doesn't need to be considered. If you want to watch 3D TV, you should go to the cinema.
Analysis of the advantages and disadvantages of intelligent TV
advantage
1. Intelligent TV has various application services such as network search, IP TV, video on demand (VOD), digital music, network news, network video phone, etc;
2. After becoming the third information access terminal after computer and mobile phone, users can access the information they need at any time;
3. TV will also become an intelligent device to realize cross platform search among TV, network and program;
4. Smart TV will also be an 'entertainment center', where users can search TV channels, record TV programs, broadcast satellite and cable TV programs and network videos.
shortcoming
1. Nowadays, most smart TVs on the market use Android operating system. Android is an operating system launched for mobile terminals. If it is to be applied on the TV platform, it needs to be transplanted. However, because of the targeted problems, it is still difficult to make Android system perfectly support the product form of flat TV;
2. The interaction between users and digital home devices is realized by remote control. Many complex projects can not be realized only by an old TV remote control;
3. The distinctive feature of smart TV is that it has an open TV application store, which provides rich application software and allows users to download and build their own personalized TV freely. At present, there are few application stores for smart TV to choose from, and the number of programs in most domestic brand application stores is no more than 10, which needs to be expanded.
Shutter type technical defect:
First of all, glasses need to be equipped with batteries, but glasses must be carried to enjoy TV programs. When batteries generate current, electromagnetic waves emitted by batteries generate radiation, which will cause unexpected lesions.
Two: the problem of picture flicker and 3D glasses flicker is mainly reflected in the active shutter 3D glasses. At present, the frequency of opening and closing of the left and right sides of 3D glasses is 50 / 60Hz, that is to say, the two glasses need to be opened and closed 50 / 60 times per second, even if it is so fast, the user's glasses can still feel it. If you watch for a long time, the burden of the eyeballs will increase.
Third: the brightness is greatly reduced. After wearing this kind of 3D glasses with black film, each eye can only get half of the light, so the active shutter can see that it is like wearing sunglasses to watch TV, and the glasses are easy to fatigue.
Non flickering 3D technology: non flickering 3D TV is the closest way to our actual experience of three-dimensional feeling, the most natural way. Just like enjoying a lively 3D image in the cinema, you can watch two images at the same time, and paste the special film separating the left image and the right image on the 3D TV surface and glasses. The left and right images are separated by TV and sent to glasses at the same time. Through glasses filtering, the left and right images are separated and sent to each eye. The brain then synthesizes these two images to make people feel 3D stereoscopic.