Mythbusters series？ AMOLED／IPS screen power consumption test

　　　　"Depend! I forgot to bring my mobile power when I went out today! " For today’s smart users, the importance of mobile power is almost flush with the mobile phone itself, and the battery life performance of the mobile phone is particularly important in such an "era". However, aside from these accessories, some mobile phone manufacturers preset a "super power saving" power mode for their mobile phones. In this mode, in addition to some connection functions being disabled, the screen of the mobile phone becomes black and white. Today, we are here to test whether the screen display color is dark or not.

Mythbusters series? AMOLED/IPS screen power consumption test

　　　　I believe many friends have seen it on the Internet or heard it from friends. Setting the screen to a dark or black background can help save electricity, and as mentioned at the beginning, manufacturers will also set some themes to extend battery life, mainly in black and white. This should be a more reliable statement, and the author should be more serious in a responsible attitude. Of course, the greeting in the title is also to add some suspense to the whole article, and the netizens in the province already know the answer before reading the article.

　　　　Of course, as a contrast, our article contains two screen types that occupy the mainstream market, namely AMOLED and IPS. As a screen, the display principles of their two screens are really very different, so let’s start with a little science on screen knowledge at the beginning of the article.

Arranged into a displayed picture by displaying pixels of three primary colors one by one (the picture comes from techeblog).

Liquid crystal screen structure (picture from Kisplay)

　　　　First of all, we should know that at present, all color display devices use the three primary colors of red, blue and green for synthesis, and another key point is the pixel, which is also the key to what we call the clarity of the mobile phone screen and so on. In fact, the IPS screen we are talking about is essentially the same as the TFT screen, both of which belong to the LCD screen, and the IPS panel is superior to the TFT in display characteristics because of the different technologies for controlling the deflection of the LCD, which has become the mainstream screen in the current mobile market (others are TN panel, MVA panel, etc.). Since the structure is the same, I can see from the above picture that it is the backlight that really makes us see the color clearly, which is also the root of the problem of light leakage that many people talk about.

OLED structure (picture from oledw.com)

　　　　On the other hand, AMOLED screens are very different in structure and lighting mode. In fact, OLED technology was rarely applied to civilian-grade products before the smart phone boom, and many AMOLED and Super AMOLED screens from Samsung made people slowly come into contact with OLED technology. Organic light-emitting diodes with dyes in OLED can emit by themselves.Colored light, undertakes the mission of "backlight+filter", which has a huge gap with LCD screen in the use of light.

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