RELATED APPLICATIONS

This application claims priority to Taiwan Application Serial Number 110142274, filed Nov. 12, 2021, the disclosure of which is incorporated herein by reference in its entirety.

BACKGROUND

Technical Field

The present disclosure relates to a display device, a backlight module, and a method for assembling display device.

Description of Related Art

A backlight module of a display device typically includes at least one optical film to distribute the light emitted by the light source evenly across a display panel. A recent trend in the design of backlight module is to use mini-LED as the light source, which can not only achieve higher brightness but also reduce the thickness of the optical cavity, so direct lit type display devices can be overall slimmer with mini-LED backlight modules. However, the internal structures of current direct lit type mini-LED backlight modules are not simplified. Most designs of such backlight modules requires additional supporting members or extruded aluminum frames to clamp and hold the optical film. Assembling backlight modules having such designs requires laterally inserting the optical film into a groove structure manually. Therefore, such designs make assembling the backlight modules more difficult, and increase the risk of damaging the optical film as well.

SUMMARY

In view of the foregoing, one of the objects of the present disclosure is to provide a backlight module that has a simple structure and is easy to assemble.

To achieve the objective stated above, in accordance with an embodiment of the present disclosure, a backlight module includes a backplate, a light source, a diffuser plate, an optical film and at least one frame. The backplate includes a base plate, a sidewall and a bent portion. The sidewall is connected to the base plate and the bent portion. The bent portion has a first surface and a second surface. The first surface faces the base plate. The second surface is opposite to the first surface. The light source is disposed on the base plate. The diffuser plate is disposed on the second surface of the bent portion. The optical film is stacked on the diffuser plate and has a third surface away from the bent portion. The frame covers the sidewall of the backplate and covers a peripheral portion of the third surface of the optical film.

In one or more embodiments of the present disclosure, the sidewall extends along a periphery of the base plate and defines a chamber with the base plate. The sidewall has an outer surface facing away from the chamber. The bent portion extends in a direction away from the outer surface of the sidewall.

In one or more embodiments of the present disclosure, the bent portion is provided along at least two edges of the backplate.

In one or more embodiments of the present disclosure, the at least one frame includes a first frame and a second frame. The first frame is affixed to the backplate. The second frame covers the first frame.

In one or more embodiments of the present disclosure, the second frame includes a fixing portion. The fixing portion is located on a side of the base plate away from the diffuser plate and is secured to the base plate.

In one or more embodiments of the present disclosure, the base plate has an indented portion. The indented portion is located at an edge of the base plate. The fixing portion of the second frame is secured to the indented portion of the base plate.

In one or more embodiments of the present disclosure, the light source, the diffuser plate and the optical film are arranged in a direction. The sidewall of the backplate includes at least one protrusion portion extending in the direction and abutting against the at least one frame.

In one or more embodiments of the present disclosure, the optical film has a thru-hole. The backplate further includes a hanger. The hanger extends from the bent portion in a direction away from the base plate, and the thru-hole of the optical film is passed through by the hanger.

In accordance with an embodiment of the present disclosure, a display device includes the aforementioned backlight module and a display panel. The display panel is disposed on a side of the at least one frame away from the optical film.

In one or more embodiments of the present disclosure, the display panel is not covered by the at least one frame.

In accordance with an embodiment of the present disclosure, a method for assembling a display device includes: providing a backplate, the backplate including a base plate, a sidewall and a bent portion, the sidewall being connected to the base plate and the bent portion, wherein the bent portion has a first surface and a second surface, the first surface faces the base plate, and the second surface is opposite to the first surface; mounting a light source on the base plate in a way that the light source faces a first direction; moving a diffuser plate in an opposite direction of the first direction onto the second surface of the bent portion; moving an optical film in the opposite direction of the first direction onto the diffuser plate, the optical film having a third surface away from the bent portion; and covering the sidewall of the backplate and a peripheral portion of the third surface of the optical film with a first frame.

In one or more embodiments of the present disclosure, the method further includes: causing a thru-hole of the optical film to be passed through by a hanger of the backplate, wherein the hanger extends from the bent portion in a direction away from the base plate.

In one or more embodiments of the present disclosure, the method further includes: causing a thru-hole of the diffuser plate to be passed through by a hanger of the backplate, wherein the hanger extends from the bent portion in a direction away from the base plate.

In one or more embodiments of the present disclosure, the step of covering the sidewall of the backplate and the peripheral portion of the third surface of the optical film with the first frame includes: making the first frame abut against a hanger of the backplate, wherein the hanger extends from the bent portion in a direction away from the base plate.

In one or more embodiments of the present disclosure, the method further includes: moving a display panel in the opposite direction of the first direction onto the first frame.

In one or more embodiments of the present disclosure, the display panel is not covered by the first frame.

In one or more embodiments of the present disclosure, the method further includes: covering the first frame with a second frame and securing the second frame to an indented portion of the base plate.

In one or more embodiments of the present disclosure, the indented portion is located at an edge of the base plate.

In one or more embodiments of the present disclosure, the method further includes: moving a display panel in the opposite direction of the first direction onto the second frame.

In one or more embodiments of the present disclosure, the display panel is not covered by the second frame.

In summary, the backplate of the backlight module in the present disclosure is formed with a bent portion to support the diffuser plate and the optical film. By this arrangement, the diffuser plate and the optical film can be assembled into the backlight module by moving the diffuser plate and the optical film along a straight path. The assembly process of the backlight module does not involve bending or laterally inserting the diffuser plate and the optical film into any lateral slot. Accordingly, the assembly of the backlight module can be carried out more efficiently, and the assembly process would not cause damage to the diffuser plate and the optical film within the backlight module. Furthermore, a simplified structure for the backlight module is provided with the bent portion formed on the backplate to support the diffuser plate and the optical film. Consequently, the production cost of the display device can be reduced with the backlight module of the present disclosure, and the backlight module can be slimmer as well.

