Display device

1. A display device, comprising: a display panel and a module at the back side of the display panel, the module comprising a back plate and a mold frame, wherein, the mold frame is provided between the back plate and the display panel, wherein,

the display device further comprises a magnetic device, and the display panel and the mold frame are attached to each other and detached from each other through the magnetic device,

wherein the magnetic device comprises a magnetic force adjustable member for adjusting attraction between the display panel and the mold frame,

wherein the magnetic force adjustable member comprises one or more electromagnetic coils formed at corresponding positions on the display panel, wherein,

when the electromagnetic coils are powered on, they generate magnetic force to allow the display panel and the mold frame to attract mutually; and

when the electromagnetic coils are powered off, they stop generating magnetic force to allow the display panel and the mold frame to separate from each other,

wherein each of the electromagnetic coils comprises a plurality of layers of metal pattern, a passivation layer is formed between two adjacent layers of metal pattern, two adjacent layers of metal pattern are interconnected through a via hole formed in the passivation layer, and among the plurality of layers of metal pattern, a first layer of metal pattern and a last layer of metal pattern are connected with two electrodes of a power supply through leads respectively,

wherein the display panel is a liquid crystal display panel which comprises a first substrate and a second substrate arranged opposite to each other,

wherein the plurality of layers of metal pattern are formed in the first substrate and/or the second substrate, and

wherein the magnetic device comprises one or more magnets which are fixedly attached to the display panel, overlapping with the plurality of layers of metal pattern of the electromagnetic coils and provided between the display panel and the mold frame, and the magnets are attracted to the mold frame through a magnetic field they generate so that the display panel is fixedly attached to the mold frame through the magnets.

2. The display device according to claim 1 , wherein the mold frame has polarity opposite to that of the magnets, at positions corresponding to the magnets, or the mold frame is provided with metal sheets which can be attracted to the magnet, at the positions corresponding to the magnets.

3. The display device according to claim 1 , wherein the magnetic device comprises one or more magnets which are fixedly attached to the mold frame and provided between the display panel and the mold frame, and the magnets are attracted to the display panel through the magnetic field they generate so that the display panel is fixedly attached to the mold frame through the magnets.

4. The display device according to claim 3 , wherein the display panel has a polarity opposite to that of the magnet at positions corresponding to the magnets, or the display panel are provided with metal sheets which can he attracted to the magnet at the positions corresponding to the magnets.

5. The display device according to claim 3 , wherein the magnetic force adjustable member comprises one or more electromagnetic coils formed at positions on the display panel corresponding to the magnets, wherein,

when detaching the display panel from the mold frame, the electromagnetic coils are powered on so as to generate magnetic force with which the display panel and the mold frame are separated from each other, wherein the magnetic force is larger than that of the magnet which allows the display panel and the mold frame to attract mutually.

6. The display device according to claim 3 , wherein the magnetic force adjustable member comprises one or more electromagnetic coils formed at positions on the display panel corresponding to the magnets, wherein,

during normal operation of the display device, the electromagnetic coils are powered on so as to generate magnetic force with which the display panel and the mold frame are attracted mutually.

7. The display device according to claim 3 , wherein the magnets re adhered to the mold frame through a. double-sided adhesive tape.

8. The display device according to claim 1 , wherein the mold frame has a polarity opposite to that generated when the electromagnetic coils are powered on at a position corresponding to the electromagnetic coils, or the mold frame is provided with metal sheets which can be attracted by magnetic force generated when the electromagnetic coils are powered on at positions corresponding to the electromagnetic coils.

9. The display device according to claim 1 , wherein the magnets are adhered to the display panel through a double-sided adhesive tape.

10. The display device according to claim 1 , wherein the magnets are permanent soft. magnets.

11. The display device according to claim 1 , wherein the first substrate is an array substrate and the second substrate is a color filter substrate.

12. The display device according to claim 1 , wherein the display device farther comprises one or more buffer pads located between the display panel and the mold frame.

13. The display device according to claim 1 , wherein the module is a backlight module which further comprises a backlight unit, and the back plate is located outside the backlight unit.