Why does the screen of the POCO F6 Pro show scrolling black bars?
The scrolling black bars are seen on the screen of the POCO F6 Pro when photographed with other devices and the width of the black bars changes if the screen is idle for a period of time. It is due to the interaction between the refresh rate of the screen and the camera's shutter speed.
For your reference, here is why this phenomenon occurs:
1. The POCO F6 Pro is equipped with a high-end 2K screen with a high refresh rate of up to 120Hz. When the screen refresh rate is higher than the camera's shutter speed, it will cause interference patterns or flickering when the screen is captured in photos or videos. This interference manifests as scrolling black bars or distortions;
2. The width of the black bars changing when the screen is idle for a period of time is related to how the screen manages its refresh rate dynamically. The POCO F6 Pro adjusts the refresh rate based on the content displayed to conserve battery when idle. This dynamic adjustment can affect the interference patterns seen through a camera lens;
3. Modern cameras use an electronic rolling shutter to capture images. This means the camera sensor scans the image from top to bottom (or vice versa) over a brief period. If this scanning rate is out of sync with the screen's refresh rate, it can capture partial refresh cycles, resulting in the appearance of black bars or distortions.
The POCO F6 Pro undergoes strict professional inspection before leaving the factory. The screen undergoes rigorous research, debugging, and optimization for the screen eye protection function. Therefore, this is a normal phenomenon and will not cause any problems such as increased eye fatigue. Please feel free to use it.
For your reference, here is why this phenomenon occurs:
1. The POCO F6 Pro is equipped with a high-end 2K screen with a high refresh rate of up to 120Hz. When the screen refresh rate is higher than the camera's shutter speed, it will cause interference patterns or flickering when the screen is captured in photos or videos. This interference manifests as scrolling black bars or distortions;
2. The width of the black bars changing when the screen is idle for a period of time is related to how the screen manages its refresh rate dynamically. The POCO F6 Pro adjusts the refresh rate based on the content displayed to conserve battery when idle. This dynamic adjustment can affect the interference patterns seen through a camera lens;
3. Modern cameras use an electronic rolling shutter to capture images. This means the camera sensor scans the image from top to bottom (or vice versa) over a brief period. If this scanning rate is out of sync with the screen's refresh rate, it can capture partial refresh cycles, resulting in the appearance of black bars or distortions.
The POCO F6 Pro undergoes strict professional inspection before leaving the factory. The screen undergoes rigorous research, debugging, and optimization for the screen eye protection function. Therefore, this is a normal phenomenon and will not cause any problems such as increased eye fatigue. Please feel free to use it.
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