Substrate and photoelectric display device

A substrate for a display device, comprising a display region and a peripheral region,

• wherein the substrate further comprises a plurality of grooves which are disposed in the peripheral region, the plurality of grooves are spaced from each other and disconnected from each other and at least one of the plurality of grooves has a closed opening in a plane parallel to the substrate;
• the substrate further comprises a protection layer, the protection layer comprises a first portion and a second portion, and the first portion is in the display region and the second portion is in the peripheral region;
• the grooves are disposed in the second portion of the protection layer, and
• wherein the substrate further comprises a plurality of thin film transistors disposed in an array and in the display region, the plurality of thin film transistors are at least partially overlapped with the first portion of the protection layer in a direction perpendicular to the substrate, and the protection layer is a transparent conductive layer.