Display apparatus and assembly method thereof

A display apparatus, comprising:

• a cover plate;
• a display film module, along a first direction, disposed on one side of the cover plate and containing a first through hole;
• a backlight module, disposed on a side of the display film module away from the cover plate, wherein the backlight module includes a backlight member, the backlight member contains a second through hole, the backlight member includes an inner end surface that forms a sidewall surface of the second through hole and an outer end surface away from the second through hole, and an orthogonal projection of the first through hole on the cover plate is referred to as a first projection and an orthogonal projection of the second through hole on the cover plate is referred to as a second projection, and the first projection is at least partially overlaps with the second projection;
• and
• a function module, wherein, along the first direction, the function module sequentially includes a first portion disposed in the first through hole, a second portion disposed in the second through hole and a third portion, and along a second direction substantially perpendicular to the first direction, the third portion extends outwardly relative to the second portion to form a first step, the backlight member is disposed on the first step, and a sidewall surface of the second portion adapts to the inner end surface to form an inner support structure surrounding the inner end surface.