Display device
A display device includes a substrate, a light-emitting element disposed on the substrate, a capping layer disposed on the light-emitting element, and a light control pattern disposed on the capping layer, including an inclined outer side surface and defining an air layer having a thickness which is variable.
1 . A display device comprising:
a substrate;
a light-emitting element disposed on the substrate;
a capping layer disposed on the light-emitting element; and
a light control pattern disposed on the capping layer, including an inclined outer side surface and defining an air layer having a thickness which is variable,
wherein the light control pattern includes:
an inclined structure including an inclined side surface;
an electrode pattern disposed on the inclined side surface of the inclined structure;
a reflective layer disposed on the electrode pattern; and
a semi-transmissive layer disposed on the reflective layer and having a position which is variable.
2 . The display device of claim 1 , wherein the reflective layer contacts at least a portion of the electrode pattern.
3 . The display device of claim 1 , wherein the air layer is defined between the reflective layer and the semi-transmissive layer.
4 . The display device of claim 1 , wherein the thickness of the air layer varies according to a voltage applied to the electrode pattern.
5 . The display device of claim 1 , wherein the thickness of the air layer varies according to the position of the semi-transmissive layer.
6 . The display device of claim 1 , wherein the light control pattern further includes:
an insulating layer disposed between the inclined structure and the reflective layer and covering at least a portion of the electrode pattern.
7 . The display device of claim 1 , wherein the light control pattern further includes:
a support pattern disposed between the capping layer and the semi-transmissive layer and supporting the semi-transmissive layer.
8 . The display device of claim 1 , wherein the semi-transmissive layer covers the inclined structure.
9 . The display device of claim 1 , further comprising:
an encapsulation substrate disposed on the light control pattern.
10 . The display device of claim 9 , wherein the encapsulation substrate includes glass.
11 . The display device of claim 9 , further comprising:
a sealing member disposed between the substrate and the encapsulation substrate.
12 . The display device of claim 1 , wherein the light control pattern is switched between a wide viewing angle mode and a narrow viewing angle mode.
13 . The display device of claim 12 , wherein in the narrow viewing angle mode, the light control pattern destructively interferes with at least a portion of visible light emitted by the light-emitting element.
14 . The display device of claim 12 , wherein
in the wide viewing angle mode, the electrode pattern is applied with a first voltage and the air layer has a first thickness, and
in the narrow viewing angle mode, the electrode pattern is applied with a second voltage and the air layer has a second thickness different from the first thickness.
15 . The display device of claim 14 , wherein the first thickness is greater than the second thickness.
16 . The display device of claim 12 , wherein in the wide viewing angle mode, the light control pattern constructively interferes with at least a portion of visible light emitted by the light-emitting element.
17 . The display device of claim 16 , wherein in the narrow viewing angle mode, the light control pattern constructively interferes with at least a portion of ultraviolet light emitted by the light-emitting element.
18 . A display device, comprising:
a substrate;
a light-emitting element disposed on the substrate;
a capping layer disposed on the light-emitting element;
a light control pattern disposed on the capping layer, including an inclined outer side surface and defining an air layer having a thickness which is variable; and
a pixel defining layer disposed on the substrate,
wherein the pixel defining layer defines an opening overlapping the light-emitting element.
19 . The display device of claim 18 , wherein the light control pattern overlaps the pixel defining layer.