Why can I see equal stripes on the screen at certain angles and why can I feel the screen is grainy in low-brightness usage scenarios?

Question

Accepted Answer

Xiaomi Watch S3 uses an AMOLED screen. There is a very thin film material in the polarizer stack. The thinner the film material, the thin film material will shrink in the direction perpendicular to the stretching direction when it extends, and it will stick to the base material. The tendon-like traces left after closing are inevitable. Please feel free to use them. The luminous brightness of different pixels on the display screen is different, resulting in macroscopic differences in brightness at different locations. The human eye is more likely to detect the difference under low brightness. This phenomenon is inevitable, so please feel free to use it.