Display panel, manufacturing method thereof, and display apparatus

A display panel comprising a display area, the display area comprising:

• a substrate having a third opening;
• a thin film transistor layer on a side of the substrate, the thin film transistor layer having a first opening to expose the third opening;
• a light emitting layer on a side of the thin film transistor layer opposite from the substrate;
• and
• an encapsulation layer on a side of the light emitting layer opposite from the substrate, the encapsulation layer having a second opening to expose the third opening,
• wherein the encapsulation layer covers side surfaces of the thin film transistor layer facing the second opening;
• orthographic projection of the first opening on the substrate covers the orthographic projection of the second opening on the substrate, and an area of the orthographic projection of the first opening on the substrate is greater than an area of the orthographic projection of the second opening on the substrate;
• and
• the orthographic projection of the second opening on the substrate covers orthographic projection of the third opening on the substrate and an area of the orthographic projection of the second opening on the substrate is greater than an area of the orthographic projection of the third opening on the substrate.