Display device

1. A display device comprising:

a display region arranged with a plurality of pixels;

a common electrode layer covering the display region; and

a sealing layer covering the common electrode layer;

wherein

the plurality of pixels are arranged along a first direction and a second direction intersecting the first direction;

the sealing layer includes at least a first insulation layer, a second insulation layer and a third insulation layer;

the first insulating layer, the second insulating layer and the third insulating layer are provided in this order from the side provided with the common electrode layer;

the third insulation layer includes a density pattern;

the density pattern includes a plurality of low density regions and a plurality of high density regions;

each of the plurality of low density regions is a sparse region and each of the plurality of high density regions is a dense region;

each of the plurality of low density regions has the third insulation layer with a lower density than an average density within the display region;

each of the plurality of high density regions has the third insulation layer with a higher density than an average density within the display region;

the plurality of low density regions is comprised of a region other than the plurality of high density regions in a plan view of the display region;

the plurality of high density regions and the plurality of low density regions are comprised of the same layer; and

both a surface of the plurality of high density regions on the common electrode layer side and a surface of the plurality of low density regions on the common electrode layer side are in direct contact on a surface opposite to a surface of the second insulating layer provided with the common electrode layer.

2. The display device according to claim 1 , wherein both the plurality of high density regions and the plurality of low density regions are arranged along the first direction or the second direction.

3. The display device according to claim 2 , wherein at least one of the plurality of high density regions and the plurality of low density regions have a limited repeating cycle in the arrangement direction of the first direction or the second direction.

4. The display device according to claim 2 , wherein both the plurality of high density regions and the plurality of low density regions have a limited repeating cycle in the arrangement direction of the first direction and the second direction; and

the limited repeating cycles are substantially equal between the plurality of high density regions and the plurality of low density regions.

5. The display device according to claim 1 , wherein at least one of the plurality of high density regions and the plurality of low density regions is a plurality of punctuated regions.

6. The display device according to claim 1 , wherein a hydrogen content in the third insulation layer within the high density region is 5 at % or more and 15 at % or less and a hydrogen content in the third insulation layer within the low density region is 30 at % or more.

7. The display device according to claim 1 , wherein the third insulation layer is a silicon nitride layer.