Display device

1 . A display device comprising:

a display panel including:

a base substrate layer,

a thin film transistor layer provided on the base substrate layer, and formed by a first wiring line layer, a first flattening film, an inorganic insulating film, a second wiring line layer, and a second flattening film, sequentially layered in this stated order,

a light-emitting element layer provided on the thin film transistor layer, and formed by a plurality of first electrodes, a plurality of light-emitting function layers, and a common second electrode, sequentially layered in this stated order, so as to correspond to a plurality of subpixels that forms a display region, and

a sealing film provided on the light-emitting element layer,

wherein:

the plurality of subpixels is divided into a group of normal subpixels, and a group of thinned-out subpixels that is surrounded by the group of normal pixels and that is thinned out compared to the group of normal subpixels,

in the inorganic insulating film, an opening that passes through the inorganic insulating film is provided in a region overlapping corresponding to the group of thinned-out subpixels, and

in an entirety of the opening, the first flattening film and the second flattening film directly contact each other.

2 . The display device according to claim 1 ,

wherein a plurality of the openings, including the opening, is provided, each of the plurality of openings having a dot-like shape.

3 . The display device according to claim 2 ,

wherein the plurality of the openings includes a plurality of first openings provided along a boundary between the group of normal subpixels and the group of thinned-out subpixels, and a plurality of second openings provided around each of the group of thinned-out subpixels.

4 . The display device according to claim 3 ,

wherein the thin film transistor layer includes a terminal electrode of a thin film transistor provided as the first wiring line layer, and a relay electrode provided as the second wiring line layer, and

the relay electrode is electrically connected to a corresponding first electrode of the plurality of first electrodes in each of the plurality of subpixels.

5 . The display device according to claim 4 ,

wherein, in each of the group of normal subpixels, a contact hole is formed in the first flattening film and the inorganic insulating film to electrically connect the terminal electrode and the relay electrode to each other, and

a center-to-center distance in a plan view between each of the plurality of first openings and a contact hole of a respective normal subpixel of the group of normal subpixels closest to each of the plurality of first openings is 50 μm or less.

6 . The display device according to claim 4 ,

wherein, in each of the group of thinned-out subpixels, a contact hole is formed in the first flattening film and the inorganic insulating film to electrically connect the terminal electrode and the relay electrode to each other, and

a center-to-center distance in a plan view between each of the plurality of second openings and a contact hole of a respective thinned-out subpixel of the group of thinned-out subpixels corresponding to each of the plurality of second openings is 50 μm or less.

7 . The display device according to claim 1 ,

wherein the opening is provided in a belt-like shape.

8 . The display device according to claim 7 ,

wherein the display panel further includes a plurality of openings, including the opening, and includes a first opening provided in a U-shape along a boundary between the group of normal subpixels and the group of thinned-out subpixels, and a set of second openings provided in a frame-like shape around each of the thinned-out subpixels.

9 . The display device according to claim 1 ,

wherein the opening is a single opening integrally provided in the region corresponding to the group of thinned-out subpixels.

10 . The display device according to claim 1 ,

wherein the thin film transistor layer includes, on a base substrate layer side of the first wiring line layer, a semiconductor layer, a gate insulating film, a third wiring line layer, a first interlayer insulating film, a fourth wiring line layer, and a second interlayer insulating film sequentially layered, in this stated order, from the base substrate layer side toward a first wiring line layer side.

11 . The display device according to claim 1 ,

wherein the display region is provided in a rectangular shape, and

the region corresponding to the group of thinned-out subpixels is provided in an intermediate portion along one side of the display region.

12 . The display device according to claim 1 ,

wherein each of the plurality of light-emitting function layers comprises an organic electroluminescence layer.