An upper substrate 300 may be located on the lower substrate 100 to face the lower substrate 100. A seal 400 may be located between the lower substrate 100 and the upper substrate 300. The seal 400 may surround the display unit 10 in the plan view of FIG. 1. A space defined by the lower substrate 100, the upper substrate 300, and the seal 400 may be separated from an external space to prevent penetration of external moisture or impurities. The seal 400 may include, for example, an inorganic material such as fit. In some implementations, the seal 400 may include epoxy.

Referring to FIG. 1, the seal 400 may entirely surround the display unit 10 and the first and second scan driving circuits 20 and 22. The display unit 10 and the first and second scan driving circuits 20 and 22 may be located in a space, for example, an inner space, defined by the lower substrate 100, the upper substrate 300, and the seal 400.

The seal 400 may be located such that at least a part of the seal 400 and the common power supply line 70 overlap each other in the z direction. The first and second light-emitting driving circuits 30 and 32 may be located under the common power supply line 70 to overlap the common power supply line 70 in the z direction, and may also overlap the seal 400 in the z direction.