Organic light-emitting display apparatus having differently spaced pixel openings

Patent metadata

Field	Value
Publication number	US-11594580-B2
Application number	US-202016945469-A
Country	US
Kind code	B2
Filing date	Jul 31, 2020
Priority date	Jan 16, 2019
Publication date	Feb 28, 2023
Grant date	Feb 28, 2023

Abstract

An organic light-emitting display apparatus implemented by using a plurality of organic light-emitting diodes on a substrate and including a first pixel and a second pixel respectively emitting light of different colors, includes: a pixel-defining layer including a first opening and a second opening, the first opening defining an emission area of the first pixel, and the second opening defining an emission area of the second pixel; a total reflective layer over the pixel-defining layer, the total reflective layer including a first upper opening corresponding to the first pixel and a second upper opening corresponding to the second pixel; and a planarization layer covering the total reflective layer and having a refractive index greater than a refractive index of the total reflective layer, wherein an area of the first upper opening is different from an area of the second upper opening.

First claim

What is claimed is:

1. A display apparatus comprising:
a first pixel and a second pixel to respectively emit light of different colors on a substrate;
a pixel-defining layer including a first opening and a second opening, the first opening defining an emission area of the first pixel, and the second opening defining an emission area of the second pixel;
a first layer over the pixel-defining layer, the first layer including a body, a first upper opening corresponding to the first pixel, and a second upper opening corresponding to the second pixel; and
a second layer covering the first layer and having a refractive index different from a refractive index of the first layer,
wherein a portion of the body surrounding the first upper opening is connected to a portion of the body surrounding the second upper opening, and
wherein an area of the first upper opening is different from an area of the second upper opening.

2. The display apparatus of claim 1 , wherein a horizontal spaced distance along a top surface of the substrate between an edge of the first opening of the pixel-defining layer and an inner edge of the first upper opening is different from a horizontal spaced distance between an edge of the second pixel and an inner edge of the second upper opening.

3. The display apparatus of claim 1 , wherein the first upper opening and the second upper opening have a quadrangular shape in which corners thereof are rounded.

4. The display apparatus of claim 1 , wherein a cross-sectional shape of the first upper opening has a tapered main inclination, and an angle θ of the tapered main inclination satisfies:

θ
>

sin

-
1

⁡

(

n
⁢
1

n
⁢
2

)

where n1 is a refractive index of the first layer, and n2 is a refractive index of the second layer.

5. The display apparatus of claim 1 , further comprising:
a thin-film encapsulation layer located between the pixel-defining layer and the first layer, the thin-film encapsulation layer comprising a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer.

6. The display apparatus of claim 5 , wherein a horizontal spaced distance ‘d’ along a top surface of the substrate between an edge of the first opening and an inner edge of the first upper opening satisfies Conditions 1 and 2 below:

0
<
d
≤

d
⁢

⁢
max

Condition
⁢

⁢
1

d
⁢

⁢
max

=

t
⁢

⁢
2
⁢

⁢

tan
⁡

(

sin

-
1

⁡

(

n
⁢
2

n
⁢
3

⁢

sin
⁡

(

π
-

2
⁢
θ

)

)

)

Condition
⁢

⁢
2

where t2 is a thickness of the organic encapsulation layer, n3 is a refractive index of the organic encapsulation layer, and n2 is a refractive index of the second layer.

7. The display apparatus of claim 1 , wherein a cross-sectional shape of the first upper opening and the second upper opening has a tapered main inclination and an inclined structure having an angle different from that of the tapered main inclination, and an angle θ of the tapered main inclination satisfies:

θ
>

sin

-
1

⁡

(

n
⁢
1

n
⁢
2

)

where n1 is a refractive index of the first layer, and n2 is a refractive i

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Geebum
• Son Jungha
• Yoo Byunghan
• Choi Chaungi
• Kim Sangwoo
• Ahn Taekyung
• Lee Kijune
• Lim Jaeik

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/879

  comprising refractive means, e.g. lenses · CPC title

• H10K59/35

  comprising red-green-blue [RGB] subpixels · CPC title

• H10K59/878 Primary

  comprising reflective means · CPC title