This is a normal phenomenon of oled, and there will be a blue phenomenon at a certain angle, but ips will not have this phenomenon, which is caused by the screen structure, so don't worry.

Organic light emitting diode (OLED), also known as organic laser display and organic electroluminescent display (OLED). Organic light-emitting diode (OLED) is a current-mode organic light-emitting device. Through carrier injection and composite luminescence, the luminous intensity is proportional to the injection current. Under the action of electric field, the holes generated by the anode and the electrons generated by the cathode of the organic light-emitting diode will move, inject into the hole transport layer and the electron transport layer respectively, and migrate to the light-emitting layer. When they meet in the luminescent layer, energy excitons are generated, thus exciting luminescent molecules to finally generate visible light.