Backlight module and display device

Patent metadata

Field	Value
Publication number	US-11112650-B2
Application number	US-201916961100-A
Country	US
Kind code	B2
Filing date	Nov 25, 2019
Priority date	Feb 2, 2019
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

Disclosed are a backlight module and a display device. The backlight module includes a substrate; a first circuit board and a second circuit board thereon, a gap portion is between the two circuit boards; a blocking member for blocking the gap portion; and an optical sheet on a side of the blocking member facing away from the substrate, wherein the blocking member includes a blocking portion, a space is provided between the blocking portion and the optical sheet, an orthographic projection of the blocking portion on the substrate covers that of the gap portion, and wherein the blocking portion includes a first inclined surface inclined with respect to the first circuit board and a second inclined surface inclined with respect to the second circuit board, and the two inclined surface converge in a direction toward a light exit side to reflect light incident thereon toward the light exit side.

First claim

What is claimed is:

1. A backlight module, comprising:
a substrate;
a first circuit board and a second circuit board provided on the substrate, a gap portion is provided between the first circuit board and the second circuit board;
a blocking member for blocking the gap portion; and
an optical sheet on a side of the blocking member facing away from the substrate,
wherein the blocking member comprises a blocking portion, the optical sheet comprises a diffusion plate, a space is provided between the blocking portion and the optical sheet, an orthographic projection of the blocking portion on the substrate covers an orthographic projection of the gap portion on the substrate,
wherein the blocking portion comprises a first inclined surface inclined with respect to the first circuit board and a second inclined surface inclined with respect to the second circuit board, and the first inclined surface and the second inclined surface converge in a direction toward a light exit side to reflect light incident thereon toward the light exit side, and
wherein the backlight module further comprises: a transparent portion provided on a side of the blocking portion facing away from the substrate, the transparent portion comprises a supporting portion on a side of the transparent portion away from the blocking portion, and the supporting portion contacts the optical sheet.

2. The backlight module according to claim 1 , wherein a light diffusion structure is provided on a surface of the blocking portion facing the transparent portion.

3. The backlight module according to claim 2 , wherein the light diffusion structure comprises a plurality of protrusions.

4. The backlight module according to claim 3 , wherein a plurality of recesses are provided on a surface of the transparent portion facing the blocking portion, and the plurality of recesses cooperate with the plurality of protrusions, respectively.

5. The backlight module according to claim 1 , wherein the transparent portion comprises a third inclined surface inclined with respect to the first circuit board and a fourth inclined surface inclined with respect to the second circuit board, and the third inclined surface and the fourth inclined surface converge in the direction toward the light exit side.

6. The backlight module according to claim 1 , wherein the blocking portion comprises a first surface facing the first circuit board and the second circuit board, the first surface contacting a part of a surface of the first circuit board and the second circuit board facing the optical sheet.

7. The backlight module according to claim 6 , wherein the blocking portion further comprises a second surface facing the substrate, and a connection portion provided on the second surface; and wherein a mating connection portion is formed on the substrate, the connection portion and the mating connection portion cooperate to connect the blocking member to the substrate.

8. The backlight module according to claim 6 , wherein the blocking portion further comprises a second surface facing the substrate, and the backlight module further comprises an adhesive layer arranged between the second surface and the substrate.

9. The backlight module according to claim 6 , wherein in a direction perpendicular to a surface of the substrate facing the first circuit board, a distance between the first surface and the supporting portion is equal to a distance between the first circuit board and the optical sheet.

10. The backlight module according to claim 6 , wherein in a direction perpendicular to a surface of the substrate facing the first circuit board, a distance between the first surface and the surface of the substrate facing the first circuit board is equal to a thickness of the first circuit board.

11. The backlight module according to claim 6 , wherein the backlight module further comprises an adhesive layer arranged between the first surface and the first circuit board and/or arranged between the first surface and the second circuit board.

12. The backlight module according to claim 1 , wherein the blocking portion comprises a white material.

13. The backlight module according to claim 1 , wherein the blocking member comprises the blocking portion and the transparent portion formed as an integral structure.

14. The backlight module according to claim 1 , further comprising:
a plurality of first light sources provided on the first circuit board; and
a plurality of second light sources provided on the second circuit board,
wherein each of the plurality of first light sources and the plurality of second light sources is a mini-LED.

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

Assignees

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

Inventors

• Zhu Hongli
• Jia Lili
• Wang Bochang
• Sun Haiwei

Classifications

• G02F1/133603

  with LEDs · CPC title

• G02F1/133606 Primary

  including a specially adapted diffusing, scattering or light controlling members · CPC title

• G02F1/133612

  Electrical details · CPC title

• G02F1/133611 Primary

  including means for improving the brightness uniformity · CPC title

• G02F1/1336 Primary

  Illuminating devices · CPC title