Granted Patent B2

US 12,256,596 · App. 18/472,797 · Granted Mar 18, 2025

Inventors: Taeyong Eom (Suwon-si, KR); Yeri Jeong (Suwon-si, KR); Youngbae Jung (Cheonan-si, KR)

Assignee: Samsung Display Co., Ltd.

H10K50/858H10K50/84H10K50/868

Abstract

Claims (43)

1. A display apparatus comprising a display module configured to define a display surface on a plane,

the display module comprising:

a plurality of light emitting elements configured to display an image on the display surface;

a cover layer configured to cover the plurality of light emitting elements; and

a pattern layer on the cover layer and having a same refractive index as the cover layer,

wherein the pattern layer comprises a plurality of diffraction patterns,

the plurality of diffraction patterns comprises:

first patterns, each of which has a first width; and

second patterns, each of which has a second width greater than the first width,

each of the first patterns and the second patterns has a plurality of hole shapes passing through the pattern layer, and the first patterns and the second patterns have a constant interval configured to constructively interfere with at least a portion of incident light generated by the plurality of light emitting elements, and

light from a light emitting element of the plurality of light emitting elements comprises a first sub light incident on a first pattern of the first patterns and a second sub light incident on a second pattern of the second patterns, and a difference in light paths of the first sub light and the second sub light is proportional to a wavelength of the light, such that the first sub light and the second sub light are constructively interfered.

2. The display apparatus of claim 1 , wherein the at least the portion of incident light diffracted by the plurality of diffraction patterns is constructively interfered.

3. The display apparatus of claim 2 , wherein each of the plurality of light emitting elements is configured to display pixel unit images on the display surface,

constructively interfered incident light displays duplicate pixel unit images between adjacent light emitting elements, and

the image is defined by the pixel unit images and the duplicate pixel unit images.

4. The display apparatus of claim 1 , wherein a ratio of the second patterns to the first patterns on the pattern layer is in a range of about 20% to about 80%.

5. The display apparatus of claim 1 , wherein a number of the first patterns is the same as that of the second patterns on the pattern layer.

6. The display apparatus of claim 1 , wherein a ratio of the width of each of the plurality of diffraction patterns to an interval of the plurality of diffraction patterns is in a range of about 5% to about 95%.

7. The display apparatus of claim 1 , wherein the plurality of diffraction patterns further comprises third patterns, each of which has a third width that is less than the first width.

8. The display apparatus of claim 1 , wherein first columns of the first patterns and second columns of the second patterns are alternately arranged.

9. The display apparatus of claim 1 , wherein the first patterns and the second patterns are alternately arranged on the plane in a first direction and a second direction perpendicular to the first direction.

10. The display apparatus of claim 1 , wherein the display module further comprises:

a base layer; and

a circuit layer on the base layer and comprising the plurality of light emitting elements, and

the cover layer is disposed on the circuit layer and has a same refractive index as the pattern layer.

11. The display apparatus of claim 10 , wherein the cover layer comprises a same material as the pattern layer.

12. The display apparatus of claim 1 , wherein each of the plurality of diffraction patterns has a shape that protrudes upward from a top surface of the display module.

13. The display apparatus of claim 1 , wherein each of the plurality of diffraction patterns has a circular shape on the plane.

14. The display apparatus of claim 1 , wherein each of the plurality of diffraction patterns has a polygonal shape on the plane.

15. The display apparatus of claim 1 , further comprising an antireflection layer on the display module,

wherein the antireflection layer comprises:

a phase retardation layer configured to retard a phase of one component of the incident light; and

a polarizing layer on the phase retardation layer.

16. A display apparatus comprising:

a base layer;

a display layer on the base layer and comprising a plurality of light emitting elements;

a cover layer on the display layer; and

a pattern layer comprising a same material as the cover layer,

wherein the pattern layer comprises a plurality of diffraction patterns comprising:

first patterns, each of which has a first width; and

second patterns, each of which has a second width greater than the first width,

wherein each of the first patterns and the second patterns has a plurality of hole shapes passing through the pattern layer, and the first patterns and the second patterns have a constant interval such that the first patterns are configured to cause constructive light interference with the second patterns, and

light from a light emitting element of the plurality of light emitting elements comprises a first sub light incident on a first pattern of the first patterns and a second sub light incident on a second pattern of the second patterns, and a difference in light paths of the first sub light and the second sub light is proportional to a wavelength of the light, such that the first sub light and the second sub light are constructively interfered.

Assignments (1)

Priority Claims (1)

Continuity (3)

References Cited (24)