C # application in OpenGL programming-Research on Moore's pattern

Moore's pattern is a large screen display that shows a large area of the same color of the screen, the color of the ripple striped. It will affect the visual effect, which can be seen on the Windows 98 shutdown screen (the Windows XP shutdown screen is gradually dimmed ). It is the interference between the scanning line pattern and the phosphor. The intensity is related to the dot distance, point size, resolution, screen size, and brightness.

Example:
No.1 normal display:

No. 2 when you prepare to shut down the system, the background gradually fades out and the Moore's pattern appears.

No. 3: the background is completely grayed out. After the cancellation, the molar pattern disappears and the status of Figure 1 is returned.

The above is the embodiment of the display's molar pattern. I believe everyone is familiar with it, but what is the principle of this phenomenon?