How much do you know about the cold knowledge of the mobile phone screen?

- Aug 15, 2018-

In fact, for mobile phone screens, very few people care about its specific parameters, the most is to look at the size, but more or less understand the mobile phone screen is still good, otherwise you may buy the phone to find the color display is poor or the brightness is not high, etc. Wait, then let's share the cold knowledge of the mobile phone screen today.



The mainstream mobile phone screen materials are LCD and OLED. The LCD needs a backlight, so the brightness and color will be a little worse. In LCD, TFT/TFT-LCD (IPS) is a display technology of LCD. The OLED does not require a backlight, and it can emit light by itself, so the viewing angle is wide, the contrast is high, the energy consumption is low, and the color is rich. In short, there are many advantages, and it is also the mainstream trend of the mobile phone screen in the future.


LCD (TFT/IPS)


Sometimes some mobile phone parameters will be written in the screen material column TFT or IPS, in fact, this is not a screen material, it is mentioned above, they are just a display technology, basically the LCD screen, but their characteristics different.


The advantage of TFT is that the saturation and color reproduction are still good. The sensitivity is also very good when sliding, but it is easy to whiten. Sometimes the color looks a little light and the power consumption is relatively high. Compared with TFT, IPS is the opposite, the display capability is excellent, but the sensitivity is not good, and the screen response speed is slow.



OLED (AMOLED, etc.)


OLED is the most common one on mobile phones. AMOLED is the meaning of active OLED. I won't go into details here. At present, AMOLED screens have three generations, AMOLED, Super AMOLED and Super AMOLED Plus, and the response speed, display effect and resolution are getting higher and higher.


For OLED, the words that people often see are “burning the screen” and “spicy eyes”. So what is going on?


First of all, talking about spicy eyes is actually hurting the eyes. Why does OLED hurt your eyes? The screen is not always bright, it is always flashing, but the flashing is very fast, the human eye can't see it (the camera can capture it), the strobe will cause visual fatigue related diseases, so if you don't want the strobe to hurt the eyes It is necessary to adjust the stroboscopic frequency to a very high value. For the human eye, 1250HZ or more is more suitable than the above, but the current mobile phone can only be around 200HZ, so some people will I will feel the discomfort of my eyes. Of course, this varies from person to person. Not everyone will do this.



In addition, the brightness of OLED is too high, even the lowest brightness, it looks very bright in the dark, so for the OLED screen, it is not high-brightness, it is stroboscopic.


So what is burnt screen? Because the OLED will emit light by itself, but the illumination time of each pixel is different, the attenuation speed is not the same, thus causing the phenomenon of afterimage, which is the burn-in. However, there is no way to avoid the problem of burning the screen, but it is not so easy to appear, so if the mobile phone encounters the problem of residual image is very serious, you can only find after-sales maintenance.



In the past, OLED screens used less, generally Samsung is in use, but now the mobile phone screen is getting bigger and bigger, the full screen is already the mainstream design, and OLED is the most suitable for making large screens and making full screens, so the future mobile phone screen materials will With OLED as the mainstay, the problem of burn-in is definitely not solved in a short period of time. Only manufacturers are expected to continuously develop new technologies to reduce the probability of occurrence.



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