Which one should I buy, quantum dot TV or OLED TV?
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I want to buy a TV recently, but some people say that quantum dots have better picture quality, while others say that OLED is better. What is the difference between the two? Which one should I buy? Before comparing which one is better, you have to understand that quantum dots are not a new screen panel. To put it more generally, it is actually an upgraded version of the LCD panel. Where is the upgrade? In fact, quantum dots are a kind of inorganic nano-scale material. Particles of different sizes can emit light of different colors when stimulated by photoelectric stimulation. The quantum dot TV is to add this material to the backlight layer of the LCD TV, thereby increasing the brightness and color gamut of the LCD TV. OLED TV is different from the double-layer structure of the LCD screen, which has a layer of liquid crystal molecules deflecting to control the color and a layer of backlight to provide light source. It is composed of small LED bulbs of the three primary colors of red, green and blue. The single-layer structure means that it is difficult for the LCD panel to be thinner than OLED. In addition, people often say that the color gamut of OLED screens is much higher than that of liquid crystals, and the contrast is also higher. In layman's terms, OLED can show more colors and the black part of the screen is darker. It is well known that color is a mixture of red, green and blue light. OLED controls the proportion of the three colors of light by controlling the brightness of the three-color LED bulbs, thereby achieving color control. The LCD TV uses the backlight to provide white light source, and the liquid crystal molecules rotate to filter different wavelengths of light (different wavelengths of light are different colors of light in real life) to control the color. However, the ideal is beautiful, but the reality is very skinny. In fact, the blocked part of the liquid crystal molecules cannot completely isolate the backlight, and a small amount of white light will pass through, thus affecting the final color. For example, if you take a piece of black paper and turn on a flashlight behind it, you can see that the part illuminated by the flashlight is actually not the same color as the other parts. This also leads to the color gamut and black purity of the LCD screen being lower than that of OLED. So how can quantum dot TV achieve a color gamut comparable to OLED? First of all, quantum dots are placed in the backlight layer as backlight. But its material has the characteristic of emitting pure monochromatic light when stimulated, so as long as red light is used, it will only stimulate particles that can emit red light, so that the backlight will emit red light, and there will be relatively less stray light. Then filtered by liquid crystal molecules, the red color produced is purer than that of ordinary LCD screens. But in terms of black purity, quantum dot TVs still perform worse than OLED. So far, the color performance is not as good as OLED, and the thickness can never be better than OLED. In addition, since OLED is pure solid, it is not only resistant to falling, but also can operate at low temperatures. Liquid crystal is liquid, and the liquid freezes at low temperatures. In addition, OLED is more flexible than liquid crystal. So are quantum dots beaten by OLED? Of course not! Let's start to criticize OLED. The above explains that OLED is composed of red, green and blue LED bulbs, but the lifespan of the three color bulbs is different. Generally, the green bulb has the longest lifespan, while the blue bulb has the shortest lifespan. This will cause the picture to become greener and greener as you watch TV. Although it is said that if you want to have a good life, you have to have more green in life. But Lao Yang still can't accept this problem. This is what people often say about the short lifespan of OLED. In addition, the manufacturing of large-size LCD panels is very mature, and OLED is currently only developed by LG Display. The production capacity and cost are not as good as LCD TVs. Finally, let's go back to the original question, how to choose between quantum dots and liquid crystals. Well, choose the one with the right price. As ordinary users, for us, there is no difference between a 3mm thick TV and an 8mm thick TV, both are very thin. Moreover, even if you have two TVs at home, as long as they are not placed side by side, most people will not be able to tell much difference between TVs of the same price. So, if the price is right, just choose the appearance and size. As a winner of Toutiao's Qingyun Plan and Baijiahao's Bai+ Plan, the 2019 Baidu Digital Author of the Year, the Baijiahao's Most Popular Author in the Technology Field, the 2019 Sogou Technology and Culture Author, and the 2021 Baijiahao Quarterly Influential Creator, he has won many awards, including the 2013 Sohu Best Industry Media Person, the 2015 China New Media Entrepreneurship Competition Beijing Third Place, the 2015 Guangmang Experience Award, the 2015 China New Media Entrepreneurship Competition Finals Third Place, and the 2018 Baidu Dynamic Annual Powerful Celebrity. |
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