Display apparatus

1. A display apparatus comprising:

a display panel having a display surface and a rear surface;

a substrate that faces the rear surface of the display panel, and having an outer circumference end face, a first groove, and a second groove, the outer circumference end face including a first end face part extending in a first direction and a second end face part extending in a second direction and intersecting the first end face part at a first intersection, the first groove being formed on the first end face part and extending in the first direction, the second groove being formed on the second end face part and extending in the second direction; and

a frame structure that holds the display panel and the substrate, and having a frame part, a first rib, and a second rib, the frame part having a cyclic shape, extending along the outer circumference end face, and surrounding the substrate and the display panel, the first rib being erected on a first part, of the frame part, that is other than a first corner part corresponding to the first intersection and being fitted with the first groove, the second rib being erected on a second part, of the frame part, that is other than the first corner part corresponding to the first intersection and being fitted with the second groove.

2. The display apparatus according to claim 1 , wherein the frame structure further includes a light shielding part that is disposed at the frame part and covers the first corner part.

3. The display apparatus according to claim 1 , wherein

the first end face part further includes a first reference surface and a first recessed surface recessed inwardly than the first reference surface,

the second end face part further includes a second reference surface and a second recessed surface recessed inwardly than the second reference surface, and

the frame structure further includes a first step part that is in contact with the first recessed surface and extends along the first rib, and a second step part that is in contact with the second recessed surface and extends along the second rib.

4. The display apparatus according to claim 1 , wherein

the substrate has a substantially rectangular planar shape extending in both the first direction and the second direction,

the outer circumference end face further includes

a third end face part provided at a position that faces the first end face part and intersecting the second end face part at a second intersection, and

a fourth end face part provided at a position that faces the second end face part and intersecting the third end face part at a third intersection and intersecting the first end face part at a fourth intersection,

the substrate further has

a third groove formed on the third end face part and extending in the first direction, and

a fourth groove formed on the fourth end face part and extending in the second direction,

the frame structure includes

a third rib erected on a third part, of the frame part, that is other than a second corner part corresponding to the second intersection and that is other than a third corner part corresponding to the third intersection, and fitted with the third groove, and

a fourth rib erected on a fourth part, of the frame part, that is other than the third corner part and that is other than a fourth corner part corresponding to the fourth intersection, and fitted with the fourth groove, and

the second part is a part, of the frame part, that is other than the fourth corner part.

5. The display apparatus according to claim 4 , wherein the third rib has a concavo-convex shape in which a size that is parallel to the display surface and that is in a direction orthogonal to the third end face part varies cyclically in the first direction.