White light emitting device and display device using the same

Patent metadata

Field	Value
Publication number	US-11112648-B2
Application number	US-201916723520-A
Country	US
Kind code	B2
Filing date	Dec 20, 2019
Priority date	Dec 3, 2014
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

A white light emitting device, including a circuit board; a plurality of light sources mounted on the circuit board, each light source of the plurality of light sources configured to emit monochromatic light; a light converter spaced apart from the circuit board, the light converter configured to convert the monochromatic light emitted from the light sources to white light; and a compensator provided between the circuit board and the light converter, the compensator configured to convert the emitted monochromatic light to white light.

First claim

What is claimed is:

1. A light emitting device comprising:
a board;
a plurality of light sources disposed on the board, each light source of the plurality of light sources including a lens and a light emitting diode configured to emit blue light;
a light converter apart from the board and configured to emit approximately white light in response to the blue light being incident on the light converter; and
a plurality of yellow phosphor members provided on the board to surround the light emitting diode,
wherein the plurality of yellow phosphor members includes a plurality of first yellow phosphor members arranged at intervals on a circumference of a first circle surrounding the light emitting diode and a plurality of second yellow phosphor members arranged at intervals on a circumference of a second circle surrounding the light emitting diode, and
wherein each of the plurality of first yellow phosphor members is disposed inside an outermost line of the lens and spaced apart from the lens.

2. The light emitting device according to claim 1 , wherein part of the plurality of yellow phosphor members is disposed outside the outermost line of the lens.

3. The light emitting device according to claim 1 , wherein the plurality of second yellow phosphor members are disposed outside the outermost line of the lens.

4. The light emitting device according to claim 1 , wherein each of the plurality of yellow phosphor members is arranged at an interval corresponding to a predetermined angle around the light emitting diode.

5. The light emitting device according to claim 1 , wherein the plurality of first yellow phosphor members are arranged substantially equidistant from the light emitting diode, and the plurality of second yellow phosphor members are arranged substantially equidistant from the light emitting diode.

6. The light emitting device according to claim 1 , wherein the plurality of yellow phosphor members include a first group of yellow phosphor members disposed on an edge of the board, and a second group of yellow phosphor members disposed at a center of the board, and the first group is more densely arranged than the second group.

7. The light emitting device according to claim 1 , wherein the plurality of yellow phosphor members have different sizes according to different levels of a color mura of white light converted from the light converter.

8. The light emitting device according to claim 1 , wherein the plurality of yellow phosphor members includes a third yellow phosphor member having first size and located on an edge of the board and a fourth yellow phosphor member having a second size and located on a center of the board, and the first size is greater than the second size.

9. The light emitting device according to claim 1 , wherein the lens does not include phosphor members.

10. A display apparatus, comprising:
a display panel; and
a light emitting device configured to emit light on the display panel,
wherein the light emitting device comprises:
a board,
a plurality of light sources disposed on the board, each light source of the plurality of light sources including a lens and a light emitting diode configured to emit blue light,
a light converter apart from the board and configured to emit approximately white light in response to the blue light being incident on the light converter, and
a plurality of yellow phosphor members provided on the board to surround the light emitting diode,

wherein the plurality of yellow phosphor members includes a plurality of first yellow phosphor members arranged at intervals on a circumference of a first circle surrounding the light emitting diode and a plurality of second yellow phosphor members arranged at intervals on a circumference of a second circle surrounding the light emitting diode, and
wherein each of the plurality of first yellow phosphor members is disposed inside an outermost line of the lens and spaced apart from the lens.

11. The display apparatus according to claim 10 , wherein part of the plurality of yellow phosphor members is disposed outside the outermost line of the lens.

12. The display apparatus according to claim 10 , wherein the plurality of second yellow phosphor members are disposed outside the outermost line of the lens.

13. The display apparatus according to claim 10 , wherein each of the plurality of yellow phosphor members is arranged at an interval corresponding to a predetermined angle around the light emitting diode.

14. The display apparatus according to claim 10 , wherein the plurality of first yellow phosphor members are arranged substantially equidistant from the light emitting diode, and the plurality of second yellow phosphor members are arranged substantially equidistant from the light emitting diode.

15. The display apparatus according to claim 10 , wherein the plurality of yellow phosphor members include a first group of yellow phosphor members disposed on an edge of the board, and a second group of yellow phosphor members disposed at a center of the board, and the first group is more densely arranged than the second group.

16. The display apparatus according to claim 10 , wherein the plurality of yellow phosphor members have different sizes according to different levels of a color mura of white light converted from the light converter.

17. The display apparatus according to claim 10 , wherein the plurality of yellow phosphor members includes a third yellow phosphor member having first size and located on an edge of the board and a fourth yellow phosphor member having a second size and located on a center of the board, and the first size is greater than the second size.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Jeon Jong Pil
• Kim Jong-Hoi
• Lee Kye Hoon
• Lee Dae-Hee
• Cho Byoung-Jin
• Choi Suk-Ju

Classifications

• H10W90/724

  between a chip and a stacked insulating package substrate, interposer or RDL · CPC title

• H10W72/227

  Multiple bumps having different sizes · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• G02F1/133606

  including a specially adapted diffusing, scattering or light controlling members · CPC title

• F21K9/64

  using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer · CPC title