The development of science and technology has made people's lives simple and rich, and the way to get video entertainment information is even more varied. I am afraid that the younger generation will be more inclined to flip through their favorite programs on the tablet or mobile phone, except for the grandparents who will watch TV on the TV. This change came so suddenly, it almost made the TV exit the historical stage and became the "background wall" of the living room.

But this kind of stimulus is not a bad thing. It accelerates the iteration of TV display technology. Major manufacturers are also trying to promote the birth of new technology, trying to make consumers see the irreplaceability of TV in the living room entertainment. Therefore, OLED TV, a strong competitor of the new generation of display technology, came into being.

Since 2013, OLED panel technology has gradually matured. From the beginning of positioning high-end, to the current price of people close to the people, the advantages of OLED TV has become more and more obvious. When I defeated the traditional CRT and continued to occupy the TV market for nearly 20 years, the LCD TV (LCD TV) is now really going to be escaping from the altar?

OLED TVs are getting cheaper and cheaper. Is it worth buying LCD TVs?

Coincidentally, there are also many friends who call themselves "middle class" want to change a good TV, but they are still confused about the emerging display technologies. Given that many people are currently confused on the choice of traditional LCD TVs or OLED TVs, where is the best OLED TV, do I have to spend more on these new technologies?

Although many people seem to have a clear understanding of the differences between LCD and OLED technologies, the difference between these two technologies is not as simple as imagined. Considering that more and more people are still struggling to buy OLED or LCD, I am from 1. Lightness, 2. Color, 3. Black field performance, 4. Response time, 5. HDR effect, 6. Viewing angle, 7. The price and other technical dimensions are analyzed one by one, the purpose is to let everyone really understand what their needs are, and make the most suitable decision for themselves when purchasing.

Technology is the bottom, what is the difference between LCD and OLED?

First, we need to know that LCD and OLED are two completely different display technologies. There are essential differences between the two in the principle of illuminating, and the differentiation of these "innate" leads to the mutual complementarity between the two types of TV products.

In a literal sense, LCD (Liquid Crystal Display) is the "liquid crystal display" technology, LCD TV is also known as the LCD TV, is a liquid crystal display technology TV using LED (light-emitting diode) as the backlight source.

OLED (Organic Light-EmitTIng Diode), literally understood as "organic light-emitting diode", and its biggest difference with LCD is the "self-illumination" property, the components of organic light-emitting semiconductor can "self-illuminate", do not need "backlight Source" support.

Literally, many people may still not understand: What does "self-illumination" mean? How is OLED technology specifically implemented? It doesn't matter, there have been people in the industry who made a very vivid metaphor for the difference between OLED and LCD: "OLED and LCD, one is like the sun, and the other is like the moon."

Of course, OLED is the sun, because all stars are "self-illuminating", so no matter which angle you look at it is bright. The LCD is more like the moon, because the planet itself does not emit light, it needs an auxiliary light source, and it illuminates by reflecting light. The LCD light source is the backlight behind the screen, which illuminates the display through refraction.

Streamlined module architecture makes OLEDs have obvious advantages in terms of lightness and thinness

Compared with the complicated liquid crystal technology, OLED display technology eliminates the need of backlight support, so the liquid crystal and backlight module are omitted, the structure is very simple, and the body can naturally reach the ultra-thin, which can probably be the traditional LCD 1 /3 thickness. The world's thinnest wallpaper TV, currently only OLED display technology can be achieved, the thickness of 2.57mm is enough to make people stunned. In addition to being thinner and lighter, OLED display technology is also reflected in the product form.

The flexible and bendable nature of OLEDs can be applied not only to televisions, but also to the imaginative space of smart devices in the future. Combined with the thin characteristics of the OLED, the screen can be made as thin as a piece of paper, and can be folded and folded at will, which is unthinkable in the LCD era.

Because of the thin and light "screen sound", this black technology can only be realized by OLED.

Last year, OLED TVs realized black technology such as “sound on the screen” that we never heard of. The technology comes from Sony's 2017 flagship product, the XBR-A1E Bravia 4K OLED TV. The magic of it is that the product can be sounded without relying on the sounding unit, but by the vibration of the screen; in other words, the TV screen is equivalent to the speaker. This technology can save space inside the TV and give full play to the ultra-thin advantages of OLED without backlight.

Since the structure of the liquid crystal screen is relatively complicated, the backlight layer and the liquid crystal material layer are separated, and the vibration affects the deflection of the liquid crystal molecules. Therefore, the technology of generating sound by screen vibration can only be applied to OLED TVs with relatively simple structure and light weight. Therefore, on the degree of lightness: OLED wins.

Black field performance: OLED wins

The black field performance can also be called the black level: it refers to the extent to which the picture can be "black" when displaying the darkest color. To give a simple example in reality: students who often play games should be more clear. In the game reading stage, they are generally black screen, and the white word “Now Loading” will appear at the bottom of the screen. This is the best time to test the performance of LCD and OLED black field.

Due to structural limitations, LCDs typically achieve black performance by shielding white light, so it is very difficult to display true black. Strictly speaking, LCD TVs can't bring true black. After all, the shadowing effect is good, there will still be some light leakage, and even the QLED quantum dot backlight system in recent years can not guarantee complete leakage.

The OLED has the characteristics of electro-luminescence, each pixel can emit light independently, and the light source can be controlled spontaneously. As long as the illumination mechanism is turned off, the real black can be brought. Therefore, it is impossible to cause light leakage under the black field, thereby improving contrast and image quality. Therefore, for those gamers who are pursuing the ultimate experience and substitution, I am afraid that only OLED TVs can meet their needs.

In addition, it is worth noting that because the OLED is self-illuminating, the wavelength is closer to the natural light, and the damage to the human eye is less; and the LCD display technology will inevitably cause blue light damage to the eyes, although the short-term viewing effect is not large, But if you have children aged 1-10 in your home, you need to control the time your child watches TV.

Response time: OLED wins

When we buy computer monitors, we may often hear the word response time. In fact, the TV industry also has this parameter, but manufacturers generally do not advertise, so they are ignored by the public. When we usually watch sports games, we will inevitably encounter the phenomenon of “afterimages”, which will frequently appear on high-speed moving objects. The response time of the screen usually refers to the speed at which each pixel of the TV reacts to the input signal, that is, the time required for the pixel to turn from dark to bright or from bright to dark. The shorter the time, the faster the screen response time, and the less likely it is to cause smear.

Due to the "innate difference" in the construction of LCD TVs and OLED TVs, LCD TVs cannot fundamentally solve the image sticking phenomenon by any means or technology. If we want to change the brightness of LCD pixels, we must deflect the liquid crystal molecules. The liquid crystal molecules need a certain time from accepting the driver chip command to changing the state, which is what we often call "response time". . We can use technical means to minimize the response time of LCD TVs. The response time of the best LCD TVs is about 2ms. Therefore, the image sticking phenomenon of the LCD screen is destined to "cannot be eradicated" and can only be avoided as much as possible.

In contrast, OLED TVs, because of the "self-illumination" property, can directly control the brightness and darkness of the pixel, without the need to deflect the liquid crystal molecules like the LCD. This has made OLED TVs far better than LCD products in response speed, even more than 1,000 times faster than plasma TVs. Therefore, it is basically impossible for the naked eye to see the phenomenon of image sticking. In the performance of high-speed dynamic pictures, OLED has a relatively large advantage.

Therefore, for those who love to watch sports games and play video games, this parameter of response time must pay more attention. To choose an LCD TV, it is recommended to buy a product with a response time of 4ms or higher. If you choose an OLED TV, you can ignore the residual image problem.

HDR effect: no matter what

The concept of HDR We first heard that it should be taken from a camera or a mobile phone. The full name of HDR is High Dynamic Range, which is the high dynamic range; the dynamic range refers to the range and contrast of brightness, the high dynamic range has a wider range of brightness and darkness, and the higher contrast between light and dark, which is to make the picture brighter. Bright, and the dark part is darker, making the image more impactful.

And TV HDR is a completely different technology, the difference is in the way it changes the picture. The most important thing about TV HDR is to increase the brightness. The increase in brightness can make the picture more realistic, especially in outdoor scenes. In the TV display technology, the problem that HDR has to solve is to make the image with larger contrast between light and dark, and the dark place is clearer.

The LCD TV is mainly realized by changing the backlight and the liquid crystal molecular layer to work together, and the backlight of the bright place is turned up, and the backlight is turned down or simply turned off, thereby realizing the adjustment of the whole backlight to achieve the best. Display effect. In contrast, OLED TVs, thanks to the independent illumination characteristics of each pixel, each pixel can be closed to achieve pure black, which is the advantage of the aforementioned OLED TV in black field performance. Under the black background, the contrast between the picture will be more obvious.

In short, whether it is LCD or OLED, if you want to have a good HDR effect, you must buy high-end products to experience the "standard" HDR effect. HDR TV below 10,000 yuan can basically only be "listen to the sound" It is.

Viewing angle: OLED wins

Usually, we watch TV at home with our family. Because they are sitting in different corners of the sofa, and each person's viewing angle is not the same, the viewing angle of the TV is especially important.

In the viewing angle, the vertical polarizer structure of the LCD display technology limits its viewing angle. Since the light source that provides the liquid crystal display has a certain directivity when it is refracted and reflected, the color distortion occurs when viewed beyond this range. Although technologies such as IPS and curved screens can improve the viewing angle of LCD display technology, there are still some dead ends.

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