Positioning member, backlight module, and display device

Abstract

A limiting member, a backlight module, and a display device are disclosed. The limiting member has at least two side arms that extend in two non-parallel directions. A first protrusion extends outward from the connection between the two side arms. Each side arm has at least one second protrusion on its outer surface. The second protrusions are spaced apart from the first protrusion and are compressed by the outermost of a first frame and a second frame, forming at least two interference positions on the outer surface of each side arm.

Claims

1. A limiting member having at least two side arms extending in two non-parallel directions, a first protrusion extending outward from the connection of the two side arms, and at least one second protrusion on the outer surface of each side arm, the second protrusions being spaced apart from the first protrusion and compressed by the outermost of a first frame and a second frame, and at least two interference positions being formed on the outer surface of each side arm; wherein a V-groove is provided between the first protrusion and the adjacent second protrusions, and a baffle extending from each side arm, the outer surface of the baffle being coplanar with the outer surface of the body portion of the side arm.

2. The limiting member as claimed in claim 1, wherein the outer surface of each of the side arms has two second protrusions, and a V-groove is provided between adjacent second protrusions.

3. The limiting member as described in claim 1, wherein the limiting member is white.

4. A backlight module comprising: a first frame having a bearing surface; a reflective sheet disposed on the bearing surface; a light guide plate disposed on the reflective sheet; a second frame mounted on the outside of the first frame and located on the light guide plate; and at least one limiting member as described in any one of claims 1 to 3, the at least one limiting member being located between the light guide plate and the second frame, the at least one limiting member interfering with the second frame and / or the light guide plate; wherein the reflective sheet has a bottom and a plurality of upright portions, the bottom being disposed on the bearing surface, the upright portions extending upward from the bottom, the first frame having a plurality of inner walls, and each of the plurality of side arms of the at least one limiting member having a body portion and a baffle extending from the body portion, each baffle being disposed between each inner wall and each upright portion.

5. The backlight module as claimed in claim 4, wherein the second frame has a plurality of outer walls, at least one of which interferes with a first protrusion and a plurality of second protrusions of the at least one limiting member.

6. The backlight module as described in claim 4, wherein each of the main body portions and each of the baffles have different thicknesses to form a clearance notch, and each of the upright portions is correspondingly disposed in each of the clearance notches.

7. The backlight module as described in claim 6, wherein the reflectivity of each of the baffles is greater than the reflectivity of the first frame.

8. The backlight module as described in claim 7, wherein the reflectivity difference between each of the baffles and the reflective sheet is less than the reflectivity difference between the first frame and the reflective sheet.

9. The backlight module as claimed in claim 4, wherein the at least one limiting member further has a protrusion disposed on one of the side arms and extending toward the bearing surface, and inserted into one of the fixing portions of the reflector.

10. The backlight module as claimed in claim 9, wherein the fixing portion is a hole whose outline is non-rotationally symmetric or non-mirror symmetric about a reference axis, the reference axis extending in the same direction as one of the side arms on which the protrusion is provided.

11. A display device comprising: a backlight module as described in any one of claims 4 to 10; and a display panel disposed on the backlight module.

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