Xiaomi has shown that it is not afraid of innovation and in the new flagship smartphone Mi MIX 4 brought a front camera under the display, which at first glance may seem "invisible" until you use it when shooting. This is how the Chinese manufacturer did it.
Mi MIX 4: The secret of the "invisible" front camera revealed
Flag smartphone Xiaomi Mi MIX 4 offers a great attraction of the technological world. This integrates the front camera under the surface of the display. The technology we've been waiting for for is finally here, and the manufacturer even explains in detail how this innovation was implemented.
I took some MIX4 photos, this is the most perfect UDC display effect. pic.twitter.com/EyUNlCP0Md
- Ice universe (@UniverseIce) August 11, 2021
Mi MIX 4 is the first smartphone from Xiaomi to offer a front camera under the display. The manufacturer thus achieved undisturbed display lines even without motorized sensors or cutouts and spaces in the display.
To make this front camera "invisible" under the display, the manufacturer used a flexible one OLED panel with technology CUP (CUP = Camera under panel). This panel is practically a kind of second display integrated into the primary one, but its function is somewhat different in this case.
Xiaomi algorithms are also available
The mentioned OLED panel is practically a small semi-transparent circle, which contains various pixels with the ability to reorganize. Their movement will allow light to flow through the panel as needed, to the lens itself, which is located below it.
In addition, this pixel lacks a TFT circuit and has a much lower RGB spectrum ratio than other pixels, ensuring access to as much light as possible. In addition, the manufacturer left nothing to chance. He added various image processing algorithms that are able to correct colors, brightness and contrast in the resulting "selfie" photo.
To summarize, Mi MIX 4 offers a specific OLED panel that is able to move its pixels. It can then let in ambient light as needed up to the front camera sensor, which is hidden below the level of this panel.
The movement of these pixels then reveals the front camera so you can take a photo. This is then further modified by special algorithms that are integrated within the MIUI system.
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