Which is better, LCD or OLED?

by：Genyu     2019-11-21
I often hear people compare LCD screens with OLED. Although the two methods are similar, do you know? They represent two completely different fields respectively, and the difference between them is also very big. What are the differences between LCD and OLED? Let's take a look. 1. The characteristics of LCD is also called LCD, which is a display that uses liquid crystal to control transmittance technology to realize color. Judging from the structure of the liquid crystal display, the LCD consists of two parallel glass plates with a thickness of about 1mm, which are evenly separated by 5μm containing the liquid crystal material, because the liquid crystal material itself does not emit light, therefore, there will be lamps as light sources on both sides of the display screen, while there will generally be a backlight plate on the back of the LCD screen, which is mainly used to provide uniform background light sources. Since the liquid crystal display has the characteristic of a specific direction when outputting the light source, if people stand at a very oblique angle to watch an all-white picture, they are likely to see black or color distortion. And because each person's vision range is different, if you don't stand in the best angle, the color you see will have the possibility of error. Although there will be color distortion when watching LCD screen in a certain environment, this does not mean that LCD has no advantages at all. If it is reasonable, LCD still has many advantages. For example, the power consumption problem that consumers are most concerned about is that the power consumption of LCD is relatively small, and the general LCD display screen uses a digital interface, which is also very convenient to use. 2. OLED features, in addition to LCD display, OLED is more high-end. The working principle of OLED is to use ITO glass transparent electrode and metal electrode as the anode and cathode respectively during the period. Under a certain voltage drive, electrons and holes are injected into the electron transport layer and the hole transport layer from the cathode and anode respectively, and then migrate to the light emitting layer respectively to emit visible light after excitation. Compared with LCD, although the cost of OLED is relatively high, its fast response time can be shortened to a subtle level, because it does not need backlight, so it has the characteristic of wide viewing angle, the width of the viewing angle can be as high as 170 degrees. In addition, since OLED can theoretically display infinite colors, even if it displays black, it can reach all black pictures, which has great advantages in contrast. However, the biggest advantage of OLED is not only a little contrast. OLED has the characteristics of ultra-thin panel and light weight. It is worth mentioning that OLED screen can be bent and folded, you can even hang it on the wall like a piece of paper, put it in your pocket, and put it on your clothes. Therefore, OLED is more popular among the public. In general, OLED is slightly better in image quality and ultra-thin characteristics. OLED will also be in the leading trend in the future display industry. However, OLED is currently limited by production costs and has encountered bottlenecks in breaking through large-size display screens. Considering costs, OLED is expected to move to the small screen market in recent years, but in any case, OLED will remain a dark horse in the display line in the next few years.
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