Light emitting module and display device

A light-emitting module, comprising a substrate, a plurality of light-emitting elements disposed in an array on the substrate, and a protective sealant covering the plurality of light-emitting elements;

• wherein the protective sealant has a thermal expansion rate that is greater than a thermal expansion of the substrate;
• wherein there is defined a plurality of grooves in a side of the substrate facing the protective sealant, and wherein each groove is arranged between adjacent light-emitting elements;
• wherein the plurality of grooves are divided into a first groove group and a second groove group, wherein a plurality of grooves in the first groove group are disposed alone a first orientation, and wherein a plurality of grooves in the second groove group are disposed along a second orientation;
• wherein the first orientation and the second orientation are respectively parallel to two vertical sides of the substrate;
• wherein of the first groove group, both ends of each groove extend in the second orientation, and wherein the two ends of the groove are respectively flush with two opposite sides of the substrate;
• wherein of the second groove group, both ends of the groove extend in the first orientation, and wherein the two ends of the groove are respectively flush with another two opposite sides of the substrate;
• wherein in the first groove group, a depth of each groove gradually decreases in a direction from a middle to both ends thereof, wherein in the second groove group, a depth of each groove gradually decreases from a middle to both ends thereof;
• wherein the light-emitting module further comprises a backplate on which the substrate is disposed, wherein the plurality of grooves in the first groove group meet with the plurality of grooves in the second groove group to form an intersection, and wherein there is defined a through hole corresponding to the intersection;
• wherein the backplate comprises a plurality of positioning posts disposed on the side of the backplate facing the substrate;
• wherein the plurality of positioning posts are integrally formed with the backplate, and wherein the plurality of positioning posts are disposed in one-to-one correspondence with the respective through holes;
• wherein each of the plurality of positioning posts penetrates the respective through hole to be in contact with the protective sealant.