Light bar, backlight assembly and display device

Patent metadata

Field	Value
Publication number	US-11608947-B2
Application number	US-201916961033-A
Country	US
Kind code	B2
Filing date	Sep 19, 2019
Priority date	Sep 19, 2019
Publication date	Mar 21, 2023
Grant date	Mar 21, 2023

Abstract

The present disclosure provides a light bar, a backlight assembly and a display device. The light bar includes a substrate; a first metal layer disposed on a first side of the substrate and comprising a plurality of first metal segments disposed at intervals along a length direction of the light bar; a second metal layer disposed on a second side opposite to the first side of the substrate and comprising a plurality of second metal segments disposed at intervals along the length direction of the light bar, a projection of the interval between two adjacent first metal segments on the substrate falls into projections of the second metal segments on the substrate, and a projection of the interval between two adjacent second metal segments on the substrate falls into projections of the first metal segments on the substrate.

First claim

What is claimed is:

1. A light bar, comprising:
a substrate;
a first metal layer disposed on a first side of the substrate, the first metal layer comprising a plurality of first metal segments disposed at intervals along a length direction of the light bar;
a second metal layer disposed on a second side opposite to the first side of the substrate, the second metal layer comprising a plurality of second metal segments disposed at intervals along the length direction of the light bar, wherein a projection of an interval between two adjacent first metal segments on the substrate falls into projections of the second metal segments on the substrate, and a projection of an interval between two adjacent second metal segments on the substrate falls into projections of the first metal segments on the substrate; and
a plurality of light-emitting circuits disposed on one side of the first metal layer away from the substrate and disposed at intervals along the length direction of the light bar, wherein a projection of each of the light-emitting circuits on the substrate is partially overlapped with a projection of two adjacent first metal segments on the substrate, a first electrode of the each of the light-emitting circuits is electrically connected with one metal segment of the two adjacent first metal segments, and a second electrode of the each of the light-emitting circuits is electrically connected with the other metal segment of the two adjacent first metal segments,
wherein the plurality of light-emitting circuits are divided into a plurality of light-emitting circuit groups disposed at intervals along the length direction of the light bar, each of the light-emitting circuit groups comprises a plurality of light-emitting circuit subgroups disposed at intervals along the length direction of the light bar, each of the light-emitting circuit subgroups comprises at least two light-emitting circuits disposed at intervals along the length direction of the light bar; and
the at least two light-emitting circuits in each of the light-emitting circuit subgroups are connected in series, and different light-emitting circuit subgroups are connected in parallel.

2. The light bar according to claim 1 , wherein in the each of the light-emitting circuit subgroups, a first metal segment electrically connected only to a first electrode of one light-emitting circuit is taken as a first terminal of the each of the light-emitting circuit subgroups, and a first metal segment electrically connected only to a second electrode of one light-emitting circuit is taken as a second terminal of the each of the light-emitting circuit subgroups.

3. The light bar according to claim 2 , further comprising:
a plurality of first metal wires disposed on the first side of the substrate, the plurality of the first metal wires are in one-to-one correspondence with the plurality of the light-emitting circuit groups, each of the first metal wires is electrically connected with the first terminal of each of the light-emitting circuit subgroups in the corresponding light-emitting circuit group; and
a plurality of second metal wires disposed on the second side of the substrate, the plurality of second metal wires are in one-to-one correspondence with the plurality of light-emitting circuit subgroups, each of the second metal wires is electrically connected to a third terminal of the corresponding light-emitting circuit subgroup, wherein the third terminal of the light-emitting circuit subgroup is a second metal segment electrically connected to the second terminal of the light-emitting circuit subgroup,
wherein a first voltage applied to the plurality of first metal wires is different from a second voltage applied to the plurality of second metal wires.

4. The light bar according to claim 3 , further comprising:
a plurality of first through holes, each of the first through holes penetrates through one first metal segment, the substrate and one second metal segment, wherein the first metal segment penetrated by the first through hole is not taken as the second terminal of any of the plurality of light-emitting circuit subgroups, and the second metal segment penetrated by the first through hole is not taken as the third terminal of any of the plurality of light-emitting circuit subgroups.

5. The light bar according to claim 3 , further comprising:
a plurality of second through holes, each of the second through holes penetrates through one first metal segment, the substrate and one second metal segment, wherein the first metal segment penetrated by the second through hole is the second terminal of each of the plurality of light-emitting circuit subgroups, and the second metal segment penetrated by the second through hole is the third terminal of each of the plurality of light-emitting circuit subgroups.

6. The light bar according to claim 5 , wherein
the second terminal of the light-emitting circuit subgroup is electrically connected to the third terminal of the light-emitting circuit subgroup through at least one second through hole penetrating through the second terminal of the light-emitting circuit subgroup, the substrate, and the third terminal of the light-emitting circuit subgroup.

7. The light bar according to claim 1 , wherein
the projection of the interval between two adjacent second metal segments on the substrate is not overlapped with the projection of the light-emitting circuit on the substrate.

8. The light bar according to claim 1 , wherein a material of the substrate comprises a flexible insulating material.

9. The light bar according to claim 1 , wherein a material of the first and a material of the second metal segments comprise copper.

10. The light bar according to claim 1 , wherein the lighting circuit is an LED circuit.

11. A backlight assembly, comprising a light bar, the light bar comprising:
a substrate;
a first metal layer disposed on a first side of the substrate, the first metal layer comprising a plurality of first metal segments disposed at intervals along a length direction of the light bar;
a second metal layer disposed on a second side opposite to the first side of the substrate, the second metal layer comprising a plurality of second metal segments disposed at intervals along the length direction of the light bar, wherein a projection of an interval between two adjacent first metal segments on the substrate falls into projections of the second metal segments on the substrate, and a projection of an interval between two adjacent second metal segments on the substrate falls into projections of the first metal segments on the substrate; and
a plurality of light-emitting circuits disposed on one side of the first metal layer away from the substrate and disposed at intervals along the length direction of the light bar, wherein a projection of each of the light-emitting circuits on the substrate is partially overlapped with a projection of two adjacent first metal segments on the substrate, a first electrode of the each of the light-emitting circuits is electrically connected with one metal segment of the two adjacent first metal segments, and a second electrode of the each of the light-emitting circuits is electrically connected with the other metal segment of the two adjacent first metal segments,
the plurality of light-emitting circuits are divided into a plurality of light-emitting circuit groups disposed at intervals along the length direction of the light bar, each of the light-emitting circuit groups comprises a plurality of light-emitting circuit subgroups disposed at intervals along the length direction of the light bar, each of the light-emitting circuit subgroups comprises at least two light-emitting ci

Assignees

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

Inventors

• Leng Shouyang
• Li Wenyang
• Han Rui
• Tong Zeyuan
• Cui Dong
• Zhang Zhipeng
• Long Bin
• Zhang Zan
• Zhai Yue
• Guan Dong
• Chi Weining
• Wang Fengping

Classifications

• H05K1/0281 Primary

  Reinforcement details thereof · CPC title

• H05K1/0206

  by printed thermal vias · CPC title

• H05K1/111

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

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21Y2103/10

  comprising a linear array of point-like light-generating elements · CPC title