The core tip: there is no doubt that the screen is one of the components that can directly affect user experience, and the debate about whether the AMOLED screen is good or the LCD screen is good has never stopped. One of the biggest advantages of a AMOLED screen, compared with the LCD screen, is that it is more energy-efficient in displaying black or dark colors, but is it true? There is no doubt that the screen is one of the most directly affected parts of the user experience, and the debate about the good AMOLED screen or the LCD screen has never stopped. One of the biggest advantages of a AMOLED screen, compared with the LCD screen, is that it is more energy-efficient in displaying black or dark colors, but is it true?
In fact, the theory behind it is very simple. LED requires less power when it displays dark colors and is completely closed when it displays black, so it doesn't consume electricity at all. LCD needs backlight layer. When it shows black, the backlight layer is still lit. It only blocks the light emitted from the backlight. It also means that LCD still needs to consume electricity when it shows black. Therefore, it can be concluded that the AMOLED screen is more energy-efficient than the LED screen when it shows black.
为了验证AMOLED的这个优点，Greenhot使用了配备1080p AMOLED屏幕的新款Moto X进行了一次测试。测试方法主要是使用Reddit Sync应用程序分别以正常模式（界面以白色为主）和夜间模式（界面以黑色为主）来显示。
To verify this advantage of AMOLED, Greenhot uses a new Moto X equipped with a 1080p AMOLED screen for a test. The main way of testing is to use Reddit Sync applications, respectively, in normal mode (white with white interface) and night mode (the interface is mainly black).
Of course, although the power test cannot exclude other components in the mobile phone, but Greenhot in the test over all other background applications, adjusted to flight mode and adjust the brightness to 50%, to the maximum extent to reduce the influence of other factors may bring.
From the results given by Greenhot, the use of nocturnal mode can indeed reduce power consumption and prolong the duration of life. Compared with the normal mode, the power consumption of nocturnal mode dropped by 41%.
It is important to note that the actual use of each person may be different, and there is not much application to provide a night pattern designed for AMOLED screen design. But with most of the current applications in the night model, the duration of a AMOLED - screen model is expected to be extended by about one or two hours. At the same time, although the AMOLED screen is more energy efficient when it displays dark colors, it is also indicated that the LCD screen can achieve greater brightness with less power. That is to say, the power utilization efficiency of the AMOLED screen is lower than that of the LCD screen.