Backlight module and method for manufacturing same, and display device

Patent metadata

Field	Value
Publication number	US-12085809-B2
Application number	US-202118271037-A
Country	US
Kind code	B2
Filing date	Oct 25, 2021
Priority date	Mar 5, 2021
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

A backlight module includes: a first optical element and a fixing frame arranged around the first optical element. The fixing frame includes a first edge frame and a second edge frame that are oppositely arranged, and a third edge frame and a fourth edge frame that are oppositely arranged. The side of each edge frame of the fixing frame facing the first optical element is provided with a plurality of adhesive tapes that are independent of each other and extend in an extension direction of the each edge frame. The first optical element is fixed to the fixing frame through the adhesive tapes.

First claim

What is claimed is:

1. A backlight module, comprising:
a first optical element;
a second optical element and a third optical element that sequentially face away from the first optical element; and
a fixing frame arranged around the first optical element;
wherein the second optical element and the third optical element are both provided with a plurality of hanging lug holes; and the first optical element is not provided with a hanging lug hole;
the fixing frame comprises:
a first edge frame and a second edge frame that are oppositely arranged, and
a third edge frame and a fourth edge frame that are oppositely arranged,
wherein a side of each edge frame of the fixing frame facing the first optical element is provided with a plurality of adhesive tapes that are independent of each other and extend in an extension direction of the each edge frame, the first optical element is fixed to the fixing frame through the adhesive tapes, and the fixing frame is made of metal;

wherein with a plurality of hanging lugs arranged on the fixing frame passing through the corresponding hanging lug holes, the second optical element and the third optical element are fixed to the fixing frame;
recess regions for the hanging lugs to be fixed are reserved on each edge frame; on any edge frame, there are at least a first recess region and a second recess region that are arranged at two ends of the edge frame respectively; at least one adhesive tape is arranged in space between the first recess region and the second recess region; and at least part of the adhesive tape is attached to the first recess region, and at least part of the adhesive tape is attached to the second recess region.

2. The backlight module according to claim 1 , wherein:
an extension length of the first edge frame and an extension length of the second edge frame are both a first extension length;
an extension length of the third edge frame and an extension length of the fourth edge frame are both a second extension length;
wherein the first extension length is greater than the second extension length;
the recess regions on the first edge frame and the second edge frame are both provided with the hanging lugs; and
the recess regions on at least one of the third edge frame or the fourth edge frame are not provided with the hanging lugs.

3. The backlight module according to claim 2 , wherein sizes of the hanging lug holes corresponding to any edge frame in a length direction of the edge frame gradually increase in a direction away from a center of the fixing frame.

4. The backlight module according to claim 2 , wherein:
an extension length of any recess region along the edge frame on which the recess region is reserved is a preset length; and
a distance between any two adjacent recess regions on the edge frame on which the two adjacent recess regions are reserved is within a range of (100 mm, 300 mm).

5. The backlight module according to claim 2 , wherein:
on the first edge frame, a distance between any two adjacent recess regions is a first preset distance; and
on the second edge frame, a distance between any two adjacent recess regions is a second preset distance different from the first preset distance.

6. The backlight module according to claim 2 , wherein:
on the first edge frame, a distance between two adjacent recess regions away from a center of the fixing frame is greater than a distance between two adjacent recess regions close to the center of the fixing frame; and
on the second edge frame, a distance between any two adjacent recess regions is a same preset distance.

7. The backlight module according to claim 2 , wherein:
on any edge frame, a length of any adhesive tape is within a range of [a, 2a+d];
wherein ‘a’ represents a distance between any two adjacent recess regions, and ‘d’ represents an extension length of the recess region along the edge frame.

8. The backlight module according to claim 2 , wherein:
on any edge frame, a distance between any two adjacent adhesive tapes is within a range of [a+2d, 2a+3d];
wherein ‘a’ represents a distance between any two adjacent recess regions, and ‘d’ represents an extension length of the recess region along the edge frame.

9. The backlight module according to claim 2 , wherein:
on the fixing frame, the recess region that corresponds to the adhesive tape and is not provided with the hanging lug is filled with rubber;
wherein a thickness of the rubber is equal to a depth of the recess region.

10. A display device, comprising: the backlight module according to claim 1 .

11. A manufacturing method for the backlight module according to claim 1 , comprising:
arranging the fixing frame around the first optical element;
arranging the plurality of adhesive tapes independent of each other on the side of each edge frame of the fixing frame facing the first optical element; and
fixing the first optical element to the fixing frame through the adhesive tapes.

12. The manufacturing method according to claim 11 , further comprising:
with the plurality of hanging lugs arranged on the fixing frame passing through the plurality of hanging lug holes provided on the second optical element and the third optical element, fixing the second optical element and the third optical element to the fixing frame;
wherein the second optical element and the third optical element sequentially face away from the first optical element.

13. The manufacturing method according to claim 12 , further comprising:
providing the recess regions for the hanging lugs to be fixed on each edge frame of the fixing frame; and
fixing the hanging lugs in the recess regions on the first edge frame and the second edge frame;
wherein the recess regions on at least one of the third edge frame or the fourth edge frame is not provided with the hanging lugs; an extension length of the first edge frame and an extension length of the second edge frame are both a first extension length, an extension length of the third edge frame and an extension length of the fourth edge frame are both a second extension length, and the first extension length is greater than the second extension length.

14. The manufacturing method according to claim 13 , wherein said arranging the plurality of adhesive tapes independent of each other on the side of each edge frame of the fixing frame facing the first optical element comprises:
arranging at least one adhesive tape in space between the first recess region and the second recess region at two ends of any edge frame;
wherein the adhesive tape is arranged on a side of the fixing frame facing the first optical element.

15. The manufacturing method according to claim 14 , wherein said arranging the plurality of adhesive tapes independent of each other on the side of each edge frame of the fixing frame facing the first optical element further comprises:
attaching at least part of the adhesive tape to the first recess region, and attaching at least part of the adhesive tape to the second recess region.

16. The manufacturing method according to claim 13 , further comprising:
filling the recess regions on the third edge frame and/or the fourth edge frame not provided with the hanging lugs with rubber;
wherein a thickness of the rubber is equal to a depth of the recess region.

Assignees

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

Inventors

• Pan Wanping
• Wu Enlong
• Fu Changjia
• Huang Jianming
• Yu Hailong
• Lin Yabin
• Su Xuezhen
• Jia Xiaobo
• Jing Chuanhe

Classifications

• G09F13/04

  Signs, boards or panels, illuminated from behind the insignia · CPC title

• G09F13/0445

  Frames · CPC title

• G06F1/1601

  Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays (constructional details related to flat displays integrated in a portable computer, e.g. laptop, handheld computer G06F1/1637; constructional details related to television receivers H04N5/64) · CPC title

• G02F1/133322

  Mechanical guidance or alignment of LCD panel support components · CPC title

• G02F1/133325

  Assembling processes · CPC title