New Delhi, Sept. 8 -- Noticing a purple dot or blotch on your phone's display can be worrying, especially if there's no big crack or obvious impact. While it might look like a small blemish, this mark is a real signal from your device that something deeper is going on. Keep reading to understand what may have gone wrong.

Smartphone screens are made up of more than just a tough piece of glass. Underneath, they contain sensitive layers that create the image you see and sense your touch. There's the digitiser, which responds to your finger movements, and the actual display layer - either OLED or LCD. Each type has its own way of showing colours and lighting up pixels.

When a purple spot appears, it usually means these hidden layers have ta...