Display device
A display device includes a pixel defining layer on a first electrode and including a pixel opening overlapping the first electrode, an encapsulation layer on the pixel defining layer and the first electrode, a sensing electrode on the encapsulation layer, a second sensing insulating layer on the sensing electrode and overlapping the pixel opening, and a third sensing insulating layer on the second sensing insulating layer and the sensing electrode. The second sensing insulating layer includes a first sub-sensing insulating layer including an inorganic material and having a first refractive index, and a second sub-sensing insulating layer including an organic material and having a second refractive index, the first refractive index being greater than the second refractive index.
1 . A display device, comprising:
a substrate;
a transistor positioned on the substrate;
a first electrode electrically connected to the transistor;
a light emission layer disposed on the first electrode;
a pixel defining layer positioned on the first electrode and including a pixel opening overlapping the first electrode;
an encapsulation layer positioned on the pixel defining layer and the first electrode;
a sensing electrode positioned on the encapsulation layer;
a second sensing insulating layer positioned on the sensing electrode and overlapping the pixel opening; and
a third sensing insulating layer disposed on the second sensing insulating layer and the sensing electrode,
wherein the second sensing insulating layer comprises:
a first sub-sensing insulating layer having a first refractive index and including an inorganic material; and
a second sub-sensing insulating layer having a second refractive index and including an organic material,
wherein the first refractive index is greater than the second refractive index, and
wherein the first sub-sensing insulating layer and the second sub-sensing insulating layer have an island pattern overlapping a center portion of the light emission layer and separated from the sensing electrode.
2 . The display device of claim 1 , wherein
the first refractive index is in a range from about 1.8 to about 1.9.
3 . The display device of claim 1 , wherein
the second refractive index is about 1.6 to about 1.7.
4 . The display device of claim 1 , wherein
a thickness of the first sub-sensing insulating layer is greater than or equal to about 1 micrometer and less than about 4 micrometers.
5 . The display device of claim 1 , wherein
a thickness of the second sensing insulating layer is greater than or equal to about 2 micrometers and less than about 8 micrometers.
6 . The display device of claim 1 , wherein
the second sensing insulating layer has a taper angle in a range from 60 degrees to 90 degrees.
7 . A display device, comprising:
a substrate;
a transistor positioned on the substrate;
a first electrode electrically connected to the transistor;
a pixel defining layer positioned on the first electrode and including a pixel opening overlapping the first electrode;
an encapsulation layer positioned on the pixel defining layer and the first electrode;
a sensing electrode positioned on the encapsulation layer;
a second sensing insulating layer positioned on the sensing electrode and overlapping the pixel opening; and
a third sensing insulating layer disposed on the second sensing insulating layer and the sensing electrode,
wherein the second sensing insulating layer comprises:
a first sub-sensing insulating layer having a first refractive index and including an inorganic material; and
a second sub-sensing insulating layer having a second refractive index and including an organic material,
wherein the first refractive index is greater than the second refractive index, and
wherein a lateral distance between an edge of the pixel opening and an edge of the second sensing insulating layer is in a range from about 1.45 micrometers to about 9 micrometers.
8 . The display device of claim 1 , wherein
a refractive index of the third sensing insulating layer is about 1.6 or less.
9 . The display device of claim 1 , further comprising:
a first sensing insulating layer positioned between the encapsulation layer and the second sensing insulating layer.
10 . The display device of claim 9 , wherein
the first sensing insulating layer comprises:
a first portion having a first thickness; and
a second portion having a second thickness,
wherein the first thickness is greater than the second thickness.
11 . The display device of claim 10 , wherein
the first portion overlaps the sensing electrode.
12 . The display device of claim 10 , wherein
the first thickness of the first portion is equal to a sum of the second thickness of the second portion and a thickness of the first sub-sensing insulating layer.
13 . The display device of claim 9 , wherein
the first sub-sensing insulating layer and the first sensing insulating layer include the same material.
14 . A display device, comprising:
a substrate;
a transistor positioned on the substrate;
a first electrode electrically connected to the transistor;
a light emission layer disposed on the first electrode;
a pixel defining layer disposed on the first electrode and including a pixel opening overlapping the first electrode;
an encapsulation layer positioned on the pixel defining layer and the first electrode;
a sensing electrode positioned on the encapsulation layer;
a first sub-sensing insulating layer positioned on the sensing electrode and overlapping the pixel opening;
a second sub-sensing insulating layer positioned on the first sub-sensing insulating layer and
a third sensing insulating layer covering side surfaces of the first sub-sensing insulating layer and side surfaces and an upper surface of the second sub-sensing insulating layer,
wherein a refractive index decreases in order of the first sub-sensing insulating layer, the second sub-sensing insulating layer, and the third sensing insulating layer, and
wherein the first sub-sensing insulating layer and the second sub-sensing insulating layer have an island pattern overlapping a center portion of the light emission layer and separated from the sensing electrode.
15 . The display device of claim 14 , wherein
the first sub-sensing insulating layer and the second sub-sensing insulating layer overlap the pixel opening and a portion of the pixel defining layer.
16 . The display device of claim 14 , wherein
the first sub-sensing insulating layer includes an inorganic material, and
the second sub-sensing insulating layer and the third sensing insulating layer include an organic material.
17 . The display device of claim 14 , wherein
the refractive index of the first sub-sensing insulating layer is in a range from about 1.8 to about 1.9,
the refractive index of the second sub-sensing insulating layer is in a range from about 1.6 to about 1.7, and
the refractive index of the second sensing insulating layer is less than about 1.6.
18 . The display device of claim 14 , wherein
a thickness of each of the first sub-sensing insulating layer and the second sub-sensing insulating layer is in a range from about 1 micrometer to about 4 micrometers.
19 . The display device of claim 14 , further comprising a first sensing insulating layer positioned under the first sub-sensing insulating layer.
20 . The display device of claim 19 , wherein
the first sensing insulating layer and the first sub-sensing insulating layer include the same material.