Display module and manufacturing method thereof

A manufacturing method of a display module, comprising:

• providing a display panel, wherein the display panel has a display region, the display region has peripheral sides and a back surface, and at least two alignment marks are disposed on the peripheral sides of the display region in a direction towards the peripheral sides of the protective layer;
• providing a protective layer, wherein the protective layer has peripheral sides, and at least two alignment grooves are defined on the peripheral sides of the protective layer, the peripheral sides of the protective layer being disposed within the peripheral sides of the display region;
• attaching the protective layer to the back surface of the display region, and corresponding the alignment grooves to the alignment marks one-to-one, respectively;
• obtaining distances between the first lateral surface of the alignment marks and the opening of the alignment grooves, or obtaining distances between the second lateral surface of the alignment marks and the correspondingly disposed bottom section of the alignment grooves to act as the dimensions of confirmed accuracy of the protective layer attached to the back surface of the display region;
• adjusting an attaching position of the protective layer according to the dimensions of confirmed accuracy to align and attach the protective layer to the back surface of the display region;
• wherein the alignment marks have a first lateral surface and a second lateral surface disposed oppositely, and the alignment grooves have an opening and a bottom section;
• and
• the first lateral surface is located on a side away from the opening of the alignment grooves in a direction towards the peripheral sides of the display region and is spaced a first distance from the opening, and the second lateral surface is located within the opening of one of the alignment grooves in a direction towards the bottom section and is spaced a second distance from the bottom section.