DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF

1 . A display device comprising:

a substrate;

a lower electrode provided above the substrate;

an organic layer provided on the lower electrode and including a light emitting layer;

an upper electrode provided on the organic layer;

an insulating layer provided above the upper electrode;

a color filter having a first surface which faces the insulating layer, and a second surface on a side opposite to the first surface;

a first lens provided on the first surface immediately above the lower electrode, formed into a convex shape and covered with the insulating layer; and

a second lens provided on the second surface immediately above the lower electrode and formed into a convex shape, wherein

the second lens comprises at least a first layer having a first refractive index and formed into a hemispherical shape, and a second layer having a second refractive index higher than the first refractive index and covering the first layer.

2 . The display device of claim 1 , wherein

the second lens further comprises a third layer having a third refractive index higher than the second refractive index and covering the second layer.

3 . The display device of claim 2 , wherein

an outer edge of the first layer, an outer edge of the second layer and an outer edge of the third layer are formed concentrically in plan view.

4 . The display device of claim 2 , wherein

the first layer is formed of an organic material, and

each of the second layer and the third layer is formed of an inorganic material or an organic material.

5 . The display device of claim 1 , wherein

the second lens overlaps at least part of the first lens in plan view.

6 . The display device of claim 1 , further comprising:

a cap layer provided on the upper electrode; and

a sealing layer provided on the cap layer and formed of an inorganic material, wherein

the insulating layer is provided on the sealing layer and is formed of an organic material, and

the first lens is formed of an organic material having a refractive index higher than a refractive index of the insulating layer.

7 . The display device of claim 1 , further comprising a rib which covers a peripheral portion of the lower electrode, wherein

the first lens and the second lens are surrounded by the rib in plan view.

8 . The display device of claim 7 , wherein

first lenses and second lenses are surrounded by the rib in plan view, and

the number of the first lenses is equal to the number of the second lenses.

9 . The display device of claim 7 , wherein

first lenses and second lenses are surrounded by the rib in plan view, and

the number of the first lenses is different from the number of the second lenses.

10 . The display device of claim 1 , further comprising a rib which covers a peripheral portion of the lower electrode, wherein

first lenses are surrounded by the rib in plan view and overlap the single second lens.

11 . The display device of claim 1 , further comprising a rib which covers a peripheral portion of the lower electrode, wherein

second lenses are surrounded by the rib in plan view and overlap the single first lens.

12 . A manufacturing method of a display device, comprising:

forming an insulating layer above a display element by using an organic material;

forming a patterned resist on the insulating layer;

forming a recess portion by removing part of the insulating layer using the resist as a mask;

forming a first lens with which the recess portion is filled;

forming a color filter on the first lens; and

forming a second lens having a convex shape on the color filter, wherein

the forming the second lens includes at least:

forming a hemispherical first layer by using a material having a first refractive index; and

forming a second layer which covers the first layer by using a material having a second refractive index higher than the first refractive index.

13 . The manufacturing method of claim 12 , wherein

the forming the second lens further includes forming a third layer which covers the second layer by using a material having a third refractive index higher than the second refractive index.

14 . The manufacturing method of claim 13 , wherein

the first layer is formed of an organic material, and

each of the second layer and the third layer is formed of an inorganic material or an organic material.

15 . The manufacturing method of claim 12 , wherein

the first lens is formed of an organic material having a refractive index higher than a refractive index of the insulating layer.