Tft Lcd Displays In Medical Fiels.Which is better, LCD or OLED? It is often heard that LCD and OLED are compared, although the two representations are somewhat similar.
LCD, also known as liquid crystal display, is a display that uses liquid crystal control transmittance technology to achieve color. From the structure of the liquid crystal display, the LCD consists of two parallel glass plates with a thickness of about 1 mm, which is evenly spaced by 5 μ m containing liquid crystal material, because the liquid crystal material itself does not emit light, so there will be a lamp tube as a light source on both sides of the display screen, while there is generally a backlight plate on the back of the LCD screen, which mainly provides a uniform background light source.
Because 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 a full white picture, they are likely to see black or color distortion. And because each person’s vision range is different, if you do not stand in the best angle, the color you see will have the possibility of error.
Although watching the LCD display screen in a certain environment will appear the phenomenon of color distortion, but this does not mean that LCD has no advantages, the existence is reasonable, LCD still has a lot of advantages. For example, consumers are most concerned about the problem of power consumption, LCD power consumption is relatively small, and the general LCD display screen will use a digital interface, it is also very convenient to use.
In addition to the LCD display, OLED is even more high-end. The working principle of OLED is to use ITO glass transparent electrode and metal electrode as the anode and cathode, respectively. Driven by a certain voltage, electrons and holes are injected from the cathode and anode to the electron transport layer and hole transport layer, and then migrate to the luminous layer to emit visible light after excitation.
Compared with LCD, OLED is relatively expensive, but its fast response time can be reduced to a subtle level, because it does not need backlight, so it has a wide viewing angle, up and down the viewing angle width can be as high as 170degrees. In addition, because OLED can theoretically display infinite colors, even if it shows black, it can achieve a full black picture, which has a great advantage in contrast.
However, the biggest advantage of OLED is more than a little contrast. OLED has ultra-thin panels and light weight. It is worth mentioning that the OLED screen can be bent, folded, and even hung on the wall, put in a pocket and inlaid on clothes like a piece of paper. So OLED is more popular with the public.
Generally speaking, OLED has a slight advantage in image quality and ultra-thin characteristics, and OLED will also be in the leading trend in the future display industry.