Backlight source and manufacture method thereof, display device

Patent metadata

Field	Value
Publication number	US-11004382-B2
Application number	US-201916423620-A
Country	US
Kind code	B2
Filing date	May 28, 2019
Priority date	Sep 4, 2018
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

A backlight source and a manufacture method thereof, a display device are provided. The backlight source includes a base substrate, the base substrate is divided into a plurality of light emitting regions, and at least one of the plurality of light emitting regions comprises a plurality of light emitting elements, a first common polar line, and a second common polar line. Light emitting brightness of at least one of the light emitting regions is adjustable independently.

First claim

What is claimed is:

1. A backlight source, comprising:
a base substrate, the base substrate being divided into a plurality of light emitting regions, and
at least one of the plurality of light emitting regions comprising:
a plurality of light emitting elements, a first common polar line, and a second common polar line,
wherein light emitting brightness of at least one of the plurality of light emitting regions is adjustable independently;
in an identical light emitting region, first poles of the plurality of light emitting elements are electrically connected to an identical first common polar line, and second poles of the plurality of light emitting elements are electrically connected to an identical second common polar line.

2. The backlight source according to claim 1 , further comprising a plurality of first wires and a plurality of second wires on the base substrate,
wherein the first common polar lines of at least two of the plurality of light emitting regions are electrically connected to different first wires, and the second common polar lines of at least two of the plurality of light emitting regions are electrically connected to an identical second wire.

3. The backlight source according to claim 2 , wherein the first common polar lines of any two of the plurality of light emitting regions are electrically connected to different first wires, and the second common polar lines of at least two of the plurality of light emitting regions are electrically connected to an identical second wire.

4. The backlight source according to claim 2 , wherein each of the plurality of light emitting regions is provided with i×j light emitting elements arranged in an array;
where i≥2, j≥1, i and j are positive integers,
i light emitting elements in an identical row are connected in series, and first poles of the plurality of light emitting elements connected in series of j rows are electrically connected to the first common polar line, and second poles of the plurality of light emitting elements connected in series of j rows are electrically connected to the second common polar line.

5. The backlight source according to claim 2 , wherein the backlight source comprises n×m light emitting regions arranged in an array;
where n≥2, m≥1; n and m are positive integers,
the first common polar lines of m light emitting regions in an identical column are electrically connected to m different first wires, respectively; and
the second common polar lines of n light emitting regions in different columns and in an identical row are electrically connected to n different second wires, respectively;
wherein the second common polar lines of the m light emitting regions in the identical column are electrically connected to an identical second wire.

6. The backlight source according to claim 2 , wherein the backlight source comprises n×m light emitting regions arranged in an array;
where n≥2, m≥1; n and m are positive integers,
the first common polar lines of m light emitting regions in an identical column are electrically connected to m different first wires, respectively; and
the second common polar lines of n light emitting regions in different columns and in an identical row are electrically connected to n different second wires, respectively;
for the m light emitting regions in the identical column, the second common polar lines of the light emitting regions in odd-numbered rows are electrically connected to an identical second wire; the second common polar lines of the light emitting regions in even-numbered rows are electrically connected to an identical second wire; and the second wire connected to the second common polar lines of the light emitting regions in the odd-numbered row and the second wire connected to the second common polar lines of the light emitting regions in the even-numbered rows are different.

7. The backlight source according to claim 2 , wherein the backlight source comprises n×m light emitting regions arranged in an array;
where n≥2, m≥1; n and m are positive integers,
the first common polar lines of m light emitting regions in an identical column are electrically connected to L different first wires, respectively, and L is a positive integer greater than 0 and less than or equal to m−1;
the second common polar lines of n light emitting regions in different columns and in an identical row are electrically connected to p different second wires, respectively, and p is a positive integer greater than 0 and less than or equal to n−1;
wherein at least two of the m light emitting regions in the identical column are connected to an identical first wire, and at least two of the n light emitting regions in the identical row are connected to an identical second wire.

8. The backlight source according to claim 6 , further comprising a plurality of lead pins provided on the base substrate and electrically connected to the first wires, and the lead pins are connected to a first driving circuit for providing a driving voltage to the first pole of the light emitting element.

9. The backlight source according to claim 2 , wherein a line width of the first wire is proportional to a length of the first wire; and
a ratio of the line width to the length of any two of the first wires is identical.

10. The backlight source according to claim 2 , wherein the first common polar line and the second common polar line are in an identical layer, and are made of an identical material.

11. The backlight source according to claim 10 , wherein the first common polar line and the first wire are in different layers;
the backlight source further comprises an insulating layer on the base substrate, and the insulating layer is between the first common polar line and the first wire;
the insulating layer is provided with a plurality of first via holes; and the first wire is electrically connected to the first common polar line through the first via hole.

12. The backlight source according to claim 11 , wherein the second wire and the first wire are in an identical layer and are made of an identical material;
the insulating layer is provided with a plurality of second via holes; and the second wire is electrically connected to the second common polar line through the second via hole.

13. The backlight source according to claim 12 , further comprising a solder resist white oil on a side, that is away from the base substrate, of the first wire or the second wire.

14. The backlight source according to claim 10 , further comprising an adhesive layer between the base substrate and the first common polar line.

15. The backlight source according to claim 1 , wherein the base substrate is a glass substrate, a sapphire substrate, a ceramic substrate or an organic resin substrate.

16. A display device, comprising a display panel and a backlight assembly, wherein the backlight assembly comprises the backlight source according to claim 1 ; and
the base substrate of the backlight source is parallel to a light emitting surface of the display panel.

Assignees

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

Inventors

• Li Yafei
• Gao Bo
• Li Pei
• Wang Guangquan
• Sun Haiwei
• Chen Ming
• Dong Xue
• Sun Wenjia
• Liu Jinxing

Classifications

• G09G3/22 Primary

  using controlled light sources · CPC title

• G02F1/133603 Primary

  with LEDs · CPC title

• G02F1/133612

  Electrical details · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G3/3426

  the different display panel areas being distributed in two dimensions, e.g. matrix · CPC title