Backlight source and display device

Patent metadata

Field	Value
Publication number	US-11540385-B2
Application number	US-202117485155-A
Country	US
Kind code	B2
Filing date	Sep 24, 2021
Priority date	Dec 25, 2020
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

The disclosure relates to the technical field of backlight structures, and discloses a backlight source and a display device. The backlight source includes a light bar and a metal frame; the side, containing the light bar, of the metal frame has a notch; the light bar includes a light-emitting unit; the light-emitting unit includes a plurality of light-emitting groups; each light-emitting group includes at least one first light-emitting group and at least one second light-emitting group, the first light-emitting group includes N light-emitting elements, the light-emitting element numbered n is connected in series with the light-emitting element numbered n+1 successively, the light-emitting element numbered 1 and the light-emitting element numbered N are arranged adjacently, and the light-emitting element numbered 1 and the light-emitting element numbered 2 are the farthest apart.

First claim

What is claimed is:

1. A backlight source, comprising a light bar and a metal frame; wherein
the light bar is arranged on one side of the metal frame, wherein the side, comprising the light bar, of the metal frame has a notch;
the light bar comprises a light-emitting unit;
the light-emitting unit comprises a plurality of light-emitting groups; and
each of the plurality of light-emitting groups comprises at least one first light-emitting group and at least one second light-emitting group;
wherein the first light-emitting group comprises N light-emitting elements; the light-emitting element numbered n is connected in series with the light-emitting element numbered n+1 successively, wherein 1≤n≤N−1; the light-emitting element numbered 1 and the light-emitting element numbered N are arranged adjacently; and the light-emitting element numbered 1 and the light-emitting element numbered 2 are farthest apart; and
the second light-emitting group comprises M light-emitting elements; the light-emitting element numbered m is connected in series with the light-emitting element numbered m+1 successively, wherein 1≤m≤M−1; and the light-emitting element numbered 1 and the light-emitting element numbered M are farthest apart.

2. The backlight source according to claim 1 , wherein an orthographic projection of the first light-emitting group on the metal frame at least partially covers the notch; and
an orthographic projection of the second light-emitting group on the metal frame and the notch are non-overlapped.

3. The backlight source according to claim 1 , wherein the light bar further comprises a circuit board, the circuit board comprises a first circuit board and a second circuit board that are connected to each other, and the light-emitting unit is arranged on the first circuit board.

4. The backlight source according to claim 3 , wherein an orthographic projection of the second circuit board on the metal frame is at least partially arranged in the notch, and the second circuit board and the metal frame are non-overlapped.

5. The backlight source according to claim 4 , wherein the first circuit board has middle pads, a first pole and a second pole of each of the light-emitting elements are respectively fixed to two adjacent middle pads, and the each light-emitting group has at least one positive pad.

6. The backlight source according to claim 5 , wherein the second circuit board has at least one positive input terminal and at least one negative input terminal;
one of the light-emitting groups is arranged between the positive input terminal and the negative input terminal;
the positive input terminal is electrically connected to a positive pole of the light-emitting element numbered 1 in the one light-emitting group through the positive pad; and
the negative input terminal is electrically connected to a negative pole of the light-emitting element numbered N or M in the one light-emitting group.

7. The backlight source according to claim 6 , wherein each of the light-emitting groups comprise one first light-emitting group and multiple second light-emitting groups; and
the one first light-emitting group and the multiple second light-emitting groups share a same positive input terminal.

8. The backlight source according to claim 5 , wherein the middle pads arranged on a same side of the first circuit board have a via hole.

9. The backlight source according to claim 5 , wherein a structure of the middle pad only welded to one light-emitting element is half of that of the middle pad welded to two light-emitting elements.

10. The backlight source according to claim 2 , wherein an orthographic projection of the light-emitting element numbered 1 in the first light-emitting group on the metal frame is at least partially arranged in the notch.

11. The backlight source according to claim 3 , wherein a width of the notch is one time or above a width of the second circuit board.

12. A display device, comprising a display panel and the backlight source according to claim 1 .

13. The display device according to claim 12 , wherein an orthographic projection of the first light-emitting group on the metal frame at least partially covers the notch; and
an orthographic projection of the second light-emitting group on the metal frame and the notch are non-overlapped.

14. The display device according to claim 12 , wherein the light bar further comprises a circuit board, the circuit board comprises a first circuit board and a second circuit board that are connected to each other, and the light-emitting unit is arranged on the first circuit board.

15. The display device according to claim 14 , wherein an orthographic projection of the second circuit board on the metal frame is at least partially arranged in the notch, and the second circuit board and the metal frame are non-overlapped.

16. The display device according to claim 15 , wherein the first circuit board has middle pads, a first pole and a second pole of each of the light-emitting elements are respectively fixed to two adjacent middle pads, and the each light-emitting group has at least one positive pad.

17. The display device according to claim 16 , wherein the second circuit board has at least one positive input terminal and at least one negative input terminal;
one of the light-emitting groups is arranged between the positive input terminal and the negative input terminal;
the positive input terminal is electrically connected to a positive pole of the light-emitting element numbered 1 in the one light-emitting group through the positive pad; and
the negative input terminal is electrically connected to a negative pole of the light-emitting element numbered N or M in the one light-emitting group.

18. The display device according to claim 16 , wherein a structure of the middle pad only welded to one light-emitting element is half of that of the middle pad welded to two light-emitting elements.

19. The display device according to claim 13 , wherein an orthographic projection of the light-emitting element numbered 1 in the first light-emitting group on the metal frame is at least partially arranged in the notch.

20. The display device according to claim 14 , wherein a width of the notch is one time or above a width of the second circuit board.

Assignees

• Beijing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd
• Beijing Boe Technology Dev Co Ltd

Inventors

• Li Sa
• Shu Xingjun
• Cai Xiujun
• Lan Wenli
• An Yue
• Zhu Fuan
• Zhang Yadong
• Zhu Zuocheng
• Du Runfei
• Wang Jiaqiang
• Sun Xingpan
• Zhao Tingting
• Wu Jianwu

Classifications

• G02F1/133613

  characterized by the sequence of light sources · CPC title

• H05K1/111

  Pads for surface mounting, e.g. lay-out · CPC title

• H05K1/0259 Primary

  Electrostatic discharge [ESD] protection · CPC title

• H05K2201/10106

  Light emitting diode [LED] · CPC title

• H05K1/14

  Structural association of two or more printed circuits (providing electric connection to or between printed circuits H05K1/11, H01R12/00) · CPC title