Display module including a light diffusion agent and display apparatus having the same

Patent metadata

Field	Value
Publication number	US-11048460-B2
Application number	US-201916539363-A
Country	US
Kind code	B2
Filing date	Aug 13, 2019
Priority date	May 28, 2015
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A display module and a display apparatus having the same are provided. The display module including a circuit board, a plurality of light emitting device packages disposed on the circuit board and electrically coupled to the circuit board, and a coating unit coated with coating solution containing a light diffusion agent covers the plurality of light emitting device packages and fills in a gap between the plurality of light emitting device packages, wherein the coating unit further includes at least one first light diffusion part that is curvedly formed on a surface of the coating unit onto which light emitted from the light emitting device packages is incident.

First claim

What is claimed is:

1. A display module comprising:
a circuit board;
a plurality of light emitting device packages disposed on the circuit board and electrically coupled to the circuit board; and
a coating unit coated with coating solution containing a light diffusion agent covers the plurality of light emitting device packages and fills in a gap between the plurality of light emitting device packages,
wherein the coating unit further comprises at least one first light diffusion part that is curvedly formed on a surface of the coating unit onto which light emitted from the plurality of light emitting device packages is incident, and
wherein the at least one first light diffusion part is concavely formed to face a corresponding light emitting device package among the plurality of light emitting device packages, has a length equivalent to a length of the corresponding light emitting device package, and a distance between a center region of the at least one first light diffusion part and the corresponding light emitting device package is less than a distance between an edge region of the at least one first light diffusion part and the corresponding light emitting device package.

2. The display module as claimed in claim 1 , wherein the display module further comprises at least one second light diffusion part that is curvedly formed on a surface of the at least one first light diffusion part and diffuses the light that is emitted from the corresponding light emitting device package among the plurality of light emitting device packages and passes through the at least one first light diffusion part.

3. The display module as claimed in claim 2 , wherein the at least one second light diffusion part is a convex lens formed through dropping of a coating ink in a preset position on the at least one first light diffusion part.

4. The display module as claimed in claim 2 , wherein the at least one second light diffusion part is a convex lens formed through a nano imprinting process using a mold.

5. The display module as claimed in claim 1 , wherein an amount of the light diffusion agent contained in a portion of the coating unit in which the at least one first light diffusion part is formed is greater than an amount of the light diffusion agent contained in a remainder portion of the coating unit excluding the portion in which the at least one first light diffusion part is formed.

6. The display module as claimed in claim 1 , wherein the corresponding light emitting device package among the plurality of light emitting device packages comprises a third light diffusion part that faces the at least one first light diffusion part and diffuses the light emitted from the corresponding light emitting device package among the plurality of light emitting device packages before the light reaches the surface of the coating unit.

7. The display module as claimed in claim 6 , wherein the third light diffusion part is concavely formed.

8. The display module as claimed in claim 6 , wherein the corresponding light emitting device package among the plurality of light emitting device packages further comprises at least one fourth light diffusion part disposed close to an edge of the third light diffusion part.

9. The display module as claimed in claim 8 , wherein the at least one fourth light diffusion part is formed to be inclined downward toward the edge of the corresponding light emitting device package.

10. The display module as claimed in claim 9 , wherein the at least one fourth light diffusion part is curvedly formed.

11. The display module as claimed in claim 10 , wherein the at least one fourth light diffusion part is concavely or convexly formed.

12. The display module as claimed in claim 1 , wherein the light diffusion agent in the coating unit contains at least one of a waterproof agent, a silicon agent, or an antistatic agent.

13. The display module as claimed in claim 1 , wherein the at least one first light diffusion part is formed by pressing the coating solution using a mold before the coating solution is cured.

14. The display module as claimed in claim 1 , wherein the corresponding light emitting device package comprises a plurality of light emitting devices which emit lights of different wavelengths, and the center region of the at least one first light diffusion part is aligned with a center of the corresponding light emitting device package.

15. The display module as claimed in claim 1 , wherein the corresponding light emitting device package comprises a plurality of light emitting devices which emit lights of different wavelengths, and entirely encloses the plurality of light emitting devices within the corresponding light emitting device package.

16. A display apparatus comprising:
a plurality of display modules, each of the plurality of display modules comprising a plurality of light emitting device packages and a coating unit, the plurality of light emitting device packages being disposed on a circuit board and electrically coupled to the circuit board, and the coating unit coated with coating solution containing a light diffusion agent covers the plurality of light emitting device packages and fills in a gap between the plurality of light emitting device packages; and
a controller configured to electrically couple the plurality of display modules and control the plurality of display modules,
wherein the coating unit further comprises at least one first light diffusion part that is curvedly formed on a surface of the coating unit onto which light emitted from the plurality of light emitting device packages is incident, and
wherein the at least one first light diffusion part is concavely formed to face a corresponding light emitting device package among the plurality of light emitting device packages, has a length equivalent to a length of the corresponding light emitting device package, and a distance between a center region of the at least one first light diffusion part and the corresponding light emitting device package is less than a distance between an edge region of the at least one first light diffusion part and the corresponding light emitting device package.

17. The display apparatus as claimed in claim 16 , wherein the display apparatus further comprises at least one convex lens as a second light diffusion part formed on a surface of the at least one first light diffusion part.

18. The display apparatus as claimed in claim 16 , wherein an amount of the light diffusion agent contained in a portion of the coating unit in which the at least one first light diffusion part is formed is greater than an amount of the light diffusion agent contained in a remainder portion of the coating unit excluding the portion in which the at least one first light diffusion part is formed.

19. The display apparatus as claimed in claim 16 , wherein the light emitted from the corresponding light emitting device package among the plurality of light emitting device packages comprises a third light diffusion part that faces the at least one first light diffusion part and diffuses the light emitted from the corresponding light emitting device package among the plurality of light emitting device packages before the light reaches the surface of the coating unit.

20. The display apparatus as claimed in claim 19 , wherein the corresponding light emitting device package among the plurality of light emitting device packages further comprises at least one fourth light diffusion part disposed close to an edge of the third light diffusion part.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Jae-Sang
• Park Jee-Su
• Lee Eun-Lai
• Lee Jae-Min
• Ha Tae-Hyeun
• Hyun Suk
• Kim Cheoul-Young
• Lee Seung-Jae

Classifications

• H10K59/879

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

• H10K59/873

  Encapsulations · CPC title

• G09G2300/026

  Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions · CPC title

• G06F3/1446 Primary

  display composed of modules, e.g. video walls · CPC title

• G09F9/30

  in which the desired character or characters are formed by combining individual elements (panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00) · CPC title