Display device

Patent metadata

Field	Value
Publication number	US-12245489-B2
Application number	US-202318142241-A
Country	US
Kind code	B2
Filing date	May 2, 2023
Priority date	Oct 6, 2022
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

A display device includes: a pixel defining layer defining openings arranged in first and second directions, the openings forming emission areas in which light emitting elements are disposed to emit light of different colors; a light blocking layer disposed on the pixel defining layer, and defining holes, each overlapping the opening and having a larger diameter than the opening; and color filters disposed on the light blocking layer to overlap the holes and overlap the emission areas. The opening has an opening interval, which is defined as a difference in diameter between the overlapping hole and the opening, in the openings, among homogeneous openings in which the light emitting elements for emitting light of the same color are disposed, the homogeneous openings adjacent in the first or second direction have different opening intervals, and among the homogeneous openings, openings having different opening intervals are at least three types.

First claim

What is claimed is:

1. A display device comprising:
a plurality of pixels comprising a plurality of emission areas in which light emitting elements for emitting light are disposed and arranged in a first direction and a second direction crossing the first direction;
a light blocking layer disposed between the emission areas adjacent to each other, and defining a plurality of holes, wherein each of the holes overlaps a corresponding emission area of the emission areas and has a different diameter from the corresponding emission area; and
a plurality of color filters disposed in the holes of the light blocking layer and overlapping the emission areas,
wherein the emission areas comprise a plurality of first emission areas for emitting light of a first color, a plurality of second emission areas for emitting light of a second color having a shorter wavelength band than the light of the first color, a plurality of third emission areas for emitting light of a third color having a wavelength band between the light of the first color and the light of the second color, and a plurality of fourth emission areas for emitting light of the third color,
the plurality of holes comprises first holes overlapping the first emission areas, second holes overlapping the second emission areas, third holes overlapping the third emission areas, and fourth holes overlapping the fourth emission areas,
in one of the pixels in a plan view, a first opening interval between a corresponding first emission area of the first emission areas and a corresponding first hole of the first holes, a second opening interval between a corresponding second emission area of the second emission areas and a corresponding second hole of the second holes, and a third opening interval between a corresponding third emission area of the third emission areas and a corresponding third hole of the third holes are different from each other, and
a corresponding fourth emission area of the fourth emission areas is differently sized from the corresponding third emission area of the third emission areas and a corresponding fourth hole of the fourth holes is differently sized from the corresponding third hole of the third holes such that a fourth opening interval between the corresponding fourth emission area and the corresponding fourth hole is different from the third opening interval.

2. The display device of claim 1 , wherein in the plurality of pixels, the emission areas for emitting light of a same color have different opening intervals, and among the emission areas for emitting light of the same color, the emission areas having different opening intervals are at least three types of emission areas.

3. The display device of claim 2 , wherein in the plurality of emission areas arranged in the first direction or the second direction,
the emission areas adjacent to each other in the first direction or the second direction and for emitting light of the same color have different opening intervals.

4. The display device of claim 1 , wherein diameters of the first emission area, the second emission area, and the third emission area are different from each other.

5. The display device of claim 1 , wherein the first opening interval, the second opening interval, and the third opening interval each are in a range of about 3 micrometers (μm) to about 10 μm.

6. The display device of claim 1 , wherein a difference in opening intervals of the emission areas for emitting light of a same color is in a range of about 0.5 μm to about 1 μm.

7. The display device of claim 6 , wherein a difference in the opening intervals of the emission areas for emitting light of the same color is constant.

8. The display device of claim 6 , wherein a difference between a minimum opening interval and an intermediate opening interval among the opening intervals of the emission areas for emitting light of the same color is different from a difference between the intermediate opening interval and a maximum opening interval among the opening intervals of the emission areas for emitting light of the same color.

9. The display device of claim 1 , wherein a minimum opening interval among first opening intervals of the first emission areas is equal to each of a minimum opening interval among second opening intervals of the second emission areas and a minimum opening interval among third opening intervals of the third emission areas.

10. The display device of claim 9 , wherein an opening interval deviation of the first opening intervals is equal to each of an opening interval deviation of the second opening intervals and an opening interval deviation of the third opening intervals.

11. The display device of claim 9 , wherein an opening interval deviation of the first opening intervals is different from each of an opening interval deviation of the second opening intervals and an opening interval deviation of the third opening intervals.

12. The display device of claim 11 , wherein a ratio of the opening interval deviation of the first opening intervals, the opening interval deviation of the second opening intervals, and the opening interval deviation of the third opening intervals is 1:0.73:0.86.

13. The display device of claim 1 , wherein a polarization layer is not disposed on the plurality of pixels.

14. The display device of claim 6 , wherein the plurality of color filters are disposed to overlap the emission areas which emit light of the same color, but have different opening intervals, and
the plurality of color filters overlapping the emission areas having different opening intervals comprise middle portions having different thicknesses.

15. A display device comprising:
a pixel defining layer defining a plurality of openings therein arranged in a first direction and a second direction crossing the first direction, the plurality of openings forming a plurality of emission areas in which a plurality of light emitting elements are disposed to emit light of different colors;
a light blocking layer disposed on the pixel defining layer, and defining a plurality of holes therein, wherein each of the holes overlaps a corresponding opening of the openings and has a larger diameter than the corresponding opening; and
a plurality of color filters disposed on the light blocking layer to overlap the holes and overlap the emission areas,
wherein the corresponding opening has an opening interval, which is defined as a difference in diameter between the overlapping hole and the corresponding opening,
in the plurality of openings, among homogeneous openings in which the light emitting elements for emitting light of a same color are disposed, the homogeneous openings adjacent in the first direction or the second direction are differently sized and have different opening intervals, and
among the homogeneous openings, openings having different opening intervals are at least three types.

16. The display device of claim 15 , wherein a difference in the opening intervals between the openings having the different opening intervals among the homogeneous openings is in a range of about 0.5 μm to about 1 μm.

17. The display device of claim 16 , wherein a difference in the opening intervals between the openings having the different opening intervals among the homogeneous openings is constant.

18. The display device of claim 15 , wherein the plurality of openings comprises a plurality of first openings in each of which a first light emitting element for emitting light of a first color is disposed, and a plurality of second openings in each of which a second light emitting

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Chan Young
• Lee Yeong Ho
• Jeon Ha Seok
• Lee Jun Hee
• Im Choong Youl
• Cho Hyun Duck
• Choi Kook Hyun

Classifications

• H10K59/8792 Primary

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K2102/311

  Flexible OLED · CPC title

• H10K59/38 Primary

  comprising colour filters or colour changing media [CCM] · CPC title

• H10K2102/351

  Thickness · CPC title