Light emitting diode package structure, backlight module and display device

Patent metadata

Field	Value
Publication number	US-9917233-B2
Application number	US-201414422141-A
Country	US
Kind code	B2
Filing date	Aug 1, 2014
Priority date	Dec 13, 2013
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

The present disclosure provides a light emitting diode (LED) package structure, a backlight module and a display device, and relates to the field of display technologies. The LED package structure includes an encapsulation housing and an LED chip encapsulated in the encapsulation housing. The encapsulation housing is a polyhedron which includes at least one inclined plane. One inclined plane of the encapsulation housing is a light exiting surface of the LED package structure.

First claim

What is claimed is:

1. A backlight module comprising:
a light emitting diode (LED) package structure, the LED package structure comprising an encapsulation housing and an LED chip encapsulated in the encapsulation housing, wherein:
the encapsulation housing is a polyhedron which comprises at least one inclined plane, one inclined plane of the encapsulation housing is a light exiting surface of the LED package structure,
the backlight module further comprises a light guide plate, a light incident surface of the light guide plate matches with the light exiting surface of the LED package structure, and
the light guide plate comprises a top surface and a bottom surface parallel to the top surface, as well as four lateral surfaces, at least one lateral surface of the light guide plate is an inclined plane,
wherein an angle defined between the inclined plane of the light guide plate and the bottom surface of the light guide plate is an acute angle; the inclined plane of the light guide plate is the light incident surface of the light guide plate; the top surface of the light guide plate is a light exiting surface of the light guide plate; the LED package structure is provided on the inclined plane of the light guide plate; the light exiting direction of the LED package structure is perpendicular to the light incident surface of the light guide plate.

2. A display device comprising the backlight module according to claim 1 .

3. The backlight module according to claim 1 , wherein the encapsulation housing comprises a first surface and a second surface which are triangular and arranged parallel to each other, as well as a first side surface, a second side surface and a third side surface connecting the first surface to the second surface; the first side surface, the second side surface or the third side surface is the light exiting surface of the LED package structure.

4. The backlight module according to claim 3 , wherein the first surface and the second surface of the encapsulation housing have isosceles right triangle shapes;
a surface, where a hypotenuse of the isosceles right triangle is located, is the light exiting surface of the LED package structure.

5. The backlight module according to claim 4 , wherein a light exiting direction of the LED chip is perpendicular to the light exiting surface of the LED package structure.

6. The backlight module according to claim 5 , wherein the encapsulation housing further comprises a strengthening portion provided in a plane where at least one right-angle side of the isosceles right triangle is located.

7. The backlight module according to claim 6 , wherein the strengthening portion and the encapsulation housing are an integral structure.

8. A display device including a backlight module, the backlight module comprising:
a light emitting diode (LED) package structure, the LED package structure comprising an encapsulation housing and an LED chip encapsulated in the encapsulation housing, wherein:
the encapsulation housing is a polyhedron which comprises at least one inclined plane, one inclined plane of the encapsulation housing is a light exiting surface of the LED package structure,
the backlight module further comprises a light guide plate, a light incident surface of the light guide plate matches with the light exiting surface of the LED package structure, and
the light guide plate comprises a top surface and a bottom surface parallel to the top surface, as well as four lateral surfaces, at least one lateral surface of the light guide plate is an inclined plane,
wherein the encapsulation housing comprises a first surface and a second surface which are triangular and arranged parallel to each other, as well as a first side surface, a second side surface and a third side surface connecting the first surface to the second surface; the first side surface, the second side surface or the third side surface is the light exiting surface of the LED package structure,
wherein the first surface and the second surface of the encapsulation housing have isosceles right triangle shapes; a surface, where a hypotenuse of the isosceles right triangle is located, is the light exiting surface of the LED package structure, and
wherein a light exiting direction of the LED chip is perpendicular to the light exiting surface of the LED package structure.

9. The display device according to claim 8 , wherein the encapsulation housing further comprises a strengthening portion provided in a plane where at least one right-angle side of the isosceles right triangle is located.

10. The display device according to claim 9 , wherein the strengthening portion and the encapsulation housing are an integral structure.

11. The display device according to claim 8 , wherein an angle defined between the inclined plane of the light guide plate and the bottom surface of the light guide plate is an acute angle.

12. The display device according to claim 11 , wherein the inclined plane of the light guide plate is the light incident surface of the light guide plate.

13. The display device according to claim 12 , wherein the top surface of the light guide plate is a light exiting surface of the light guide plate.

14. The display device according to claim 13 , wherein the LED package structure is provided on the inclined plane of the light guide plate.

15. The display device according to claim 13 , the light exiting direction of the LED package structure is perpendicular to the light incident surface of the light guide plate.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Display Tech Co

Inventors

• Bai Ling
• Bu Zhanchang
• Wang Hetao
• Lu Kun
• Yan Kai

Classifications

• G02B6/002

  by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces · CPC title

• G02B6/0073

  Light emitting diode [LED] · CPC title

• G02F1/133603

  with LEDs · CPC title

• G02B6/0091 Primary

  of the light source relative to the light guide (G02B6/0021 takes precedence) · CPC title

• F21S8/00

  Lighting devices intended for fixed installation (F21S9/00, F21S10/00 take precedence; using a string or strip of light sources F21S4/00) · CPC title