DISPLAY DEVICE
According to one embodiment, a display device comprises a substrate, a first display element provided above the substrate, a sealing layer covering the first display element, and an optical control element overlapping the sealing layer. The optical control element comprises a plurality of partitions including a pair of first partitions sandwiching the first display element in plan view, and an optical layer located between the pair of the first partitions, in contact with a side surface of the first partition, and overlapping the first display element. A refractive index of each of the partitions is smaller than a refractive index of the optical layer.
1 . A display device, comprising:
a substrate;
a first display element provided above the substrate;
a sealing layer covering the first display element; and
an optical control element overlapping the sealing layer, wherein
the optical control element includes:
a plurality of partitions including a pair of first partitions sandwiching the first display element in plan view; and
an optical layer located between the pair of the first partitions, in contact with a side surface of the first partition, and overlapping the first display element, and
a refractive index of each of the partitions is smaller than a refractive index of the optical layer.
2 . The display device of claim 1 , wherein
the first display element includes:
a lower electrode;
an organic layer including a light emitting layer overlapping the lower electrode; and
an upper electrode overlapping the organic layer, wherein
the display device further comprises a rib surrounding the lower electrode and the light emitting layer in plan view, and
the first partition overlaps the rib.
3 . The display device of claim 1 , wherein
each of the partitions has a tapered cross section whose width decreases as being farther from the sealing layer, and
the side surface is inclined with respect to a normal of the substrate.
4 . The display device of claim 1 , further comprising:
a polarizer bonded to the optical control element.
5 . The display device of claim 1 , further comprising:
a color filter overlapping the first display element.
6 . The display device of claim 1 , wherein
the refractive index of the optical layer and a refractive index of the sealing layer are equivalent to each other.
7 . The display device of claim 1 , wherein
each of the partitions includes a bottom surface facing the sealing layer, and
the optical control element further comprises a first light-shielding layer covering the bottom surface.
8 . The display device of claim 1 , wherein
the plurality of partitions further include a second partition located between the pair of the first partitions in plan view and overlapping the first display element.
9 . The display device of claim 1 , wherein
the plurality of partitions further include a pair of third partitions intersecting the pair of the first partitions in plan view and sandwiching the first display element.
10 . The display device of claim 1 , further comprising:
a second display element adjacent to the first display element, wherein
the plurality of partitions include no partitions sandwiching the second display element in plan view, and
the optical layer overlaps the second display element.
11 . A display device, comprising:
a first transparent substrate;
a second transparent substrate facing the first transparent substrate;
a liquid crystal layer located between the first transparent substrate and the second transparent substrate;
a first pixel electrode provided between the first transparent substrate and the liquid crystal layer; and
an optical control element provided between the second transparent substrate and the liquid crystal layer, wherein
the optical control element includes:
a plurality of partitions including a pair of first partitions sandwiching the first pixel electrode in plan view; and
an optical layer located between the pair of the first partitions, in contact with a side surface of the first partition, and overlapping the first pixel electrode, and
a refractive index of each of the partitions is smaller than a refractive index of the optical layer.
12 . The display device of claim 11 , wherein
each of the partitions has a tapered cross section whose width decreases as being farther from the liquid crystal layer, and
the side surface is inclined with respect to a normal of the first transparent substrate.
13 . The display device of claim 11 , further comprising:
a color filter provided between the liquid crystal layer and the optical layer and overlapping the first pixel electrode.
14 . The display device of claim 13 , further comprising:
an overcoat layer covering the color filter and provided between the color filter layer and the liquid crystal layer.
15 . The display device of claim 13 , wherein
the optical control element further comprises an overcoat layer covering the plurality of partitions and the optical layer and located between the optical layer and the color filter.
16 . The display device of claim 12 , wherein
each of the partitions includes a bottom surface facing the liquid crystal layer, and
the optical control element further comprises a first light-shielding layer covering the bottom surface.
17 . The display device of claim 11 , further comprising:
a second pixel electrode adjacent to the first pixel electrode, wherein
the plurality of partitions include no partitions sandwiching the second pixel electrode in plan view, and
the optical layer overlaps the second pixel electrode.
18 . The display device of claim 7 , wherein
each of the partitions further includes an upper surface located on a side opposite to the bottom surface, and
the optical control element further comprises a second light-shielding layer covering the upper surface of the partition.
19 . The display device of claim 1 , wherein
a refractive index difference between the refractive index of the partition and the refractive index of the optical layer is 0.2 or more.
20 . The display device of claim 1 , wherein
the partition is a light absorbing body.