Question:

I think a stain is shown on the right side of the front camera, the around part of front camera, or fingerprint sensor part. Or, there is a slight difference in brightness on the right side of the front camera, the around part of front camera, or fingerprint sensor part compared to the entire screen.

Answer:

The AMOLED display has a film that acts as an external light shield and absorption, and the area where the proximity/light sensor and fingerprint sensor are attached has no film for sensor operation.

As a result, the brightness of areas attached the sensor may look different when the screen is left on for a long time, but the symptom disappears after a certain period of time after turning off the screen. Also using a bright wallpaper can reduce this phenomenon.

Due to the fine characteristics difference of the semiconductor that makes up AMOLED, the brightness may vary slightly depending on the device and this is according to the characteristics of the parts. This is not a device defect and doesn�t affect to device performance.