Light source, backlight module and manufacturing method thereof, and display device

Patent metadata

Field	Value
Publication number	US-11340395-B2
Application number	US-201916605631-A
Country	US
Kind code	B2
Filing date	Apr 9, 2019
Priority date	May 3, 2018
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

The present disclosure provides a light source, a backlight module and a manufacturing method thereof and a display device. The light source includes a light-emitting element and a circuit board supplying power for the light-emitting element, the circuit board includes a first bottom plate and a first side plate, the first bottom plate and the first side plate are connected to form a bent shape, and the light-emitting element is arranged on the first side plate and located on an identical side of the first side plate with the first bottom plate.

First claim

The invention claimed is:

1. A backlight module, comprising:
a light source, comprising:
a light-emitting element; and
a circuit board, supplying power for the light-emitting element, and being formed to have a bent shape;
wherein the circuit board includes a first bottom plate and a first side plate, the first bottom plate and the first side plate are connected to form the bent shape, and the light-emitting element is arranged on the first side plate and located on an identical side of the first side plate with the first bottom plate;
a backboard, the backboard including a second bottom plate and a second side plate, at least a portion of the backboard including a bent structure, and the second bottom plate and the second side plate being connected to form the bent structure;
a light guide plate, a light exiting surface of the light-emitting element and a light incoming surface of the light guide plate being oppositely arranged; and
a reflector plate, arranged on an opposite side of a light exiting surface of the light guide plate,
wherein the bent shape is connected to the bent structure, the first side plate is connected to the second side plate, and the first bottom plate is connected to the second bottom plate,
wherein the second bottom plate further includes a protrusion, and along a light exiting direction of the backlight module, the reflector plate and the light guide plate are sequentially arranged on the protrusion,
in a light exiting direction of the light source, the light exiting surface of the light-emitting element is flush with the light incoming surface of the light guide plate,
wherein the first bottom plate is located between the second bottom plate and the reflector plate, and a surface of the first bottom plate on which the reflector plate is arranged is flush with a surface of the protrusion facing the reflector plate, and
the protrusion and the backboard are of an integrated structure.

2. The backlight module according to claim 1 , wherein the protrusion includes a protrusion strip extending in a length direction of the light source; or the protrusion includes a plurality of protrusion segments, and the protrusion segments are arranged in the length direction of the light source.

3. The backlight module according to claim 1 , wherein the first bottom plate and the first side plate are fixed to the backboard through an adhesive tape.

4. The backlight module according to claim 3 , wherein the adhesive tape is a heat conduction adhesive tape.

5. The backlight module according to claim 1 , wherein the bent structure of the backboard is an integrated structure.

6. The backlight module according to claim 5 , wherein the bent structure is in an L shape.

7. The backlight module according to claim 1 , wherein the bent shape and the bent structure are identical in shape.

8. A display device, comprising:
a backlight module, according to claim 1 .

9. A manufacturing method of the backlight module according to claim 1 , comprising:
providing the light source, comprising:
a light-emitting element; and
a circuit board, supplying power for the light-emitting element, and being formed to have a bent shape;
wherein the circuit board includes a first bottom plate and a first side plate, the first bottom plate and the first side plate are connected to form the bent shape, and the light-emitting element is arranged on the first side plate and located on an identical side of the first side plate with the first bottom plate;
connecting the first side plate to the second side plate, connecting the first bottom plate to the second bottom plate, and making the bent shape connected with the bent structure;
arranging a light guide plate onto the backboard, and making the light exiting surface of the light-emitting element and the light incoming surface of the light guide plate oppositely arranged;
disposing the reflector plate on an opposite side of a light exiting surface of the light guide plate,
wherein the second bottom plate further includes a protrusion, and along a light exiting direction of the backlight module, the reflector plate and the light guide plate are sequentially arranged on the protrusion,
in a light exiting direction of the light source, the light exiting surface of the light-emitting element is flush with the light incoming surface of the light guide plate,
wherein the first bottom plate is located between the second bottom plate and the reflector plate, and a surface of the first bottom plate on which the reflector plate is arranged is flush with a surface of the protrusion facing the reflector plate, and
the protrusion and the backboard are of an integrated structure.

10. The manufacturing method of the backlight module according to claim 9 , wherein the backlight module further comprises a reflector plate arranged on an opposite side of a light exiting surface of the light guide plate,
the backboard further includes a protrusion,
in a light exiting direction of the backlight module, the reflector plate and the light guide plate are sequentially arranged on the protrusion;
before arranging the light guide plate onto the backboard, the manufacturing method further comprises:
arranging the reflector plate on a surface of the backboard including the protrusion, the protrusion supporting the reflector plate, so that in a light exiting direction of the light source, the light exiting surface of the light-emitting element is flush with the light incoming surface of the light guide plate.

11. The backlight module according to claim 1 , wherein the first bottom plate and the first side plate are of an integrated structure.

12. The backlight module according to claim 1 , wherein the circuit board includes:
at least one component and a plurality of leads, configured to supply power for the light-emitting element,
the at least one component and the plurality of leads are arranged on the first bottom plate.

13. The backlight module according to claim 1 , wherein the light-emitting element is an LED chip.

14. The backlight module according to claim 1 , wherein the circuit board is an aluminum substrate.

15. The backlight module according to claim 1 , wherein a groove is formed in a surface of the first side plate on an identical side with the first bottom plate, and the light-emitting element is arranged in the groove, and is electrically connected with the circuit board through an electrical connection member on a side wall of the groove.

16. The backlight module according to claim 1 , wherein the light-emitting element is fixed to a surface of the first side plate on an identical side with the first bottom plate, and is electrically connected with the circuit board through an electrical connection member on the surface.

17. The backlight module according to claim 1 , wherein the bent shape is an L shape.

Assignees

• Hefei Boe Display Lighting Co
• Boe Technology Group Co Ltd

Inventors

• Xu Yong
• Sun Wenbo
• Xia Jitai
• Ling Zungan
• Wang Xing

Classifications

• G02B6/0073 Primary

  Light emitting diode [LED] · CPC title

• G02B6/0088 Primary

  of the light guide or other optical sheets in the package · CPC title

• F21V23/00

  Arrangement of electric circuit elements in or on lighting devices {(characterised by cooling arrangements F21V29/508)} · CPC title

• G02B6/0068

  Arrangements of plural sources, e.g. multi-colour light sources · CPC title

• G02B6/0055

  Reflecting element, sheet or layer · CPC title