Welding device, light-emitting element welding method, and display device

A light-emitting element welding method, comprising:

• providing a fixing component, wherein the fixing component comprises a first fixing member and a second fixing member that are spaced apart from each other along a first direction, at least one of the first fixing member or the second fixing member is movably disposed along the first direction, the first fixing member and the second fixing member are capable of approaching or being separated from each other, and a first work plane is comprised between the first fixing member and the second fixing member along the first direction;
• fixing a device group to be welded by the fixing component, wherein the device group to be welded comprises a light-emitting element to be welded;
• providing a welding part that emits energy in a direction of a current light-emitting element to be welded in the device group to be welded;
• and
• providing a pressure application component, wherein an orthographic projection of the pressure application component on the first work plane at least partially surrounds an orthographic projection of the welding part on the first work plane, and the pressure application component emits gas to at least the device group to be welded at a position of the current light-emitting element to be welded to apply pressure.

A display device, comprising a light-emitting element and a second substrate, wherein the second substrate comprises a signal line and a pad, and the light-emitting element and the pad are welded by using a welding device, wherein the welding device comprises:

• a fixing component configured to fix a device group to be welded and comprising a first fixing member and a second fixing member that are spaced apart from each other along a first direction, wherein at least one of the first fixing member or the second fixing member is movably disposed along the first direction, and the first fixing member and the second fixing member are capable of approaching or being separated from each other;
• a welding part disposed on a side of the fixing component along the first direction and movably disposed relative to the fixing component, wherein the welding part is configured to be capable of emitting energy in a direction of a current element to be welded in the device group to be welded;
• and
• a pressure application component disposed on the side of the fixing component along the first direction and movably disposed relative to the fixing component;
• wherein in a case where the welding device is in operation, a first work plane is comprised between the first fixing member and the second fixing member along the first direction, an orthographic projection of the pressure application component on the first work plane at least partially surrounds an orthographic projection of the welding part on the first work plane, and the pressure application component is configured to emit gas to at least the device group to be welded at a position of the current element to be welded to apply pressure.