Backlight module, display device and method of assembling display device

Patent metadata

Field	Value
Publication number	US-11892730-B2
Application number	US-202318218076-A
Country	US
Kind code	B2
Filing date	Jul 4, 2023
Priority date	Jul 5, 2022
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A backlight module, a display device, and a method of assembling a display device are disclosed. The backlight module includes a backplate, a middle frame, and a bonding adhesive. The middle frame is disposed on the backplate. A first adhesive holding slot is disposed between the backplate and the middle frame. At least one adhesive passage hole is defined in the middle frame. One end of the at least one adhesive passage hole is connected to the first adhesive holding slot, and another end of the at least one adhesive passage hole defines an opening at a top of the middle frame.

First claim

What is claimed is:

1. A backlight module, comprising:
a backplate;
a middle frame, arranged on the backplate; and
a bonding adhesive;
wherein a first adhesive holding slot is disposed between the backplate and the middle frame, and at least one adhesive passage hole is defined in the middle frame; wherein one end of the at least one adhesive passage hole is connected to the first adhesive holding slot, and another end of the at least one adhesive passage hole defines an opening at a top of the middle frame;
wherein the bonding adhesive is disposed in the first adhesive holding slot, the middle frame is placed on the backplate for pressing and bonding, and the bonding adhesive in the first adhesive holding slot in the backplate flows to the opening at the top of the middle frame through the at least one adhesive passage hole and continues to spread outward, so that the bonding adhesive fills the first adhesive holding slot and the at least one adhesive passage hole and further covers the opening at the top of the middle frame, and further protrudes from a top surface of the middle frame.

2. The backlight module as recited in claim 1 , wherein the backplate comprises a bottom plate and a side plate vertically connected to the bottom plate; wherein a first slot is defined in the bottom plate, and a second slot is defined in a side of the middle frame adjacent to the bottom plate, and wherein the first slot and the second slot are disposed corresponding to each other to constitute the first adhesive holding slot; or
wherein the backplate comprises a bottom plate and a side plate vertically connected to the bottom plate, wherein a first slot is defined in the bottom plate, and a second side is defined in the side of the middle frame adjacent to the bottom plate, wherein the first slot and the second slot are disposed corresponding to each other; wherein a third slot is defined in a side of the side plate corresponding to the second slot, and wherein the first slot, the second slot, and the third slot collectively constitute the first adhesive holding slot.

3. The backlight module as recited in claim 2 , further comprising an adhesive overflow slot disposed between the side plate and the middle frame.

4. The backlight module as recited in claim 3 , wherein the adhesive overflow slot is defined in the middle frame and is disposed opposite to the side plate; wherein a protrusion is disposed between the overflow adhesive slot and the first adhesive holding slot, and a gap is defined between the protrusion and the side plate, wherein the adhesive overflow slot is connected to the first adhesive holding slot through the gap between the protrusion and the side plate.

5. The backlight module as recited in claim 1 , wherein the at least one adhesive passage hole comprises a plurality of sub-adhesive passage holes, which are distributed along an edge of the middle frame and are disposed in a staggered manner.

6. The backlight module as recited in claim 1 , wherein an end of the middle frame facing away from the bottom plate defines a second adhesive-holding slot, which is connected with the first adhesive-holding slot through the at least one adhesive passage hole, and wherein the bonding adhesive is disposed in the second adhesive-holding slot.

7. The backlight module as recited in claim 1 , wherein conductive particles are mixed in the bonding adhesive, and wherein the bonding adhesive is used to be connected to a ground wire in the display panel.

8. The backlight module as recited in claim 2 , wherein the at least one adhesive passage hole is circular.

9. The backlight module as recited in claim 3 , wherein the adhesive overflow slot is defined in the side plate and is disposed opposite to the middle frame;
wherein a protrusion is disposed between the overflow adhesive slot and the first adhesive-holding slot, and a gap is defined between the protrusion and the middle frame, and wherein the adhesive overflow tank is connected with the first adhesive holding slot through the gap defined between the protrusion and the middle frame.

10. The backlight module as recited in claim 2 , wherein a side of the second slot facing away from the side plate is a slope, which is not perpendicular to a corresponding side of the first slot, and wherein a cavity having a triangular cross-section is defined between the slope and the bottom plate.

11. The backlight module as recited in claim 8 , wherein a diameter of the at least one adhesive passage hole lies in the range of 1-2 mm, and wherein a distance between every two adhesive passage holes lies in the range of 15 mm-30 mm.

12. The backlight module as recited in claim 2 , wherein the second adhesive-holding slot comprises a fourth slot and a fifth slot disposed above the fourth slot, wherein an area of a slot surface of the fifth slot is greater than an area of a slot surface of the fourth slot, and wherein an area of the slot surface of the fourth slot is greater than a cross-sectional area of the at least one adhesive passage hole.

13. The backlight module as recited in claim 12 , wherein the area of the slot surface of the fourth slot increases gradually in a direction of approaching the fifth slot.

14. The backlight module as recited in claim 1 , wherein a projection is disposed on a side of the middle frame adjacent to the backplate, wherein a cross section of the projection is triangular, and a third slot is defined in the side plate corresponding to the projection, and wherein a shape of the third slot is congruent with a shape of the projection.

15. A display device, comprising a display panel and a backlight module, the backlight module comprising:
a backplate;
a middle frame, arranged on the backplate; and
a bonding adhesive;
wherein a first adhesive holding slot is disposed between the backplate and the middle frame, and at least one adhesive passage hole is defined in the middle frame; wherein one end of the at least one adhesive passage hole is connected to the first adhesive holding slot, and another end of the at least one adhesive passage hole defines an opening at a top of the middle frame;
wherein the bonding adhesive is disposed in the first adhesive holding slot, the middle frame is placed on the backplate for pressing and bonding, and the bonding adhesive in the first adhesive holding slot in the backplate flows to the opening at the top of the middle frame through the at least one adhesive passage hole and continues to spread outward, so that the bonding adhesive fills the first adhesive holding slot and the adhesive passage hole and further covers the opening at the top of the middle frame, and further protrudes from a top surface of the middle frame;
wherein the display panel is arranged on the top of the middle frame of the backlight module, and is bonded and fixed to the middle frame by the bonding adhesive.

16. A method of assembling a display device, comprising:
injecting a sufficient amount of bonding adhesive into a position corresponding to a first adhesive holding slot defined in a backplate;
placing a middle frame on the backplate, squeezing the bonding adhesive to bond the middle frame and the backplate together, wherein when placing the middle frame on the backplate for pressing and bonding, the bonding adhesive in the first adhesive holding slot in the backplate flows to an opening in a top of the middle frame through at least one adhesive passage hole defined in the middle frame and continues to spread outward, so that the bonding adhesive fills the first adhesive holding slot and the at least one adhesive passage hole and further cov

Assignees

• Hkc Corp Ltd

Inventors

• Yang Xiaohui
• Yuan Haijiang

Classifications

• G02F1/133608 Primary

  including particular frames or supporting means · CPC title

• G02F1/133325

  Assembling processes · CPC title

• G02F1/133308 Primary

  Support structures for LCD panels, e.g. frames or bezels · CPC title

• G02F1/1303

  Apparatus specially adapted to the manufacture of LCDs · CPC title

• G02F2202/28

  Adhesive materials or arrangements · CPC title