Backlight module and display device

The present disclosure relates to a backlight module and a display device. The backlight module includes a connection portion to be connected to a middle casing of a display device or a side frame of a display device, and the connection portion is located on a side of the backlight module adjacent to the middle casing of the display device.

CROSS-REFERENCE TO RELATED APPLICATION

The present application is the national phase of PCT application PCT/CN2018/104403 filed on Sep. 6, 2018, and claims the benefit of Chinese Patent Application No. 201810002982.6 filed on Jan. 2, 2018 in the State Intellectual Property Office of China, the whole disclosure of which is incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to a field of display technologies, and in particular, to a backlight module and a display device.

BACKGROUND

With the development of science and technology, a narrow frame design of mobile terminals, such as a mobile phone, has prevailed over the current design trend. A mobile phone of the related art includes a display module, a cover glass fixed to a front side of the display module, and a side frame that is bonded to the cover glass with glue dispensing. In order to ensure a bonding strength between the side frame and the cover glass, a width l of the dispensed glue is usually not less than 0.8 mm. In order to avoid assembly interference between the display module and the side frame, a gap c between the display module and the side frame should be at least 0.3 mm. In this regard, in the related art, a distance between the display module and the edge of the cover glass is at least above 1.1 mm, which results in a relatively large size of the frame of the mobile phone, thereby affecting the screen-to-body ratio of the mobile phone.

SUMMARY

According to an aspect of the present disclosure, there is provided a backlight module, comprising a connection portion to be connected to a middle casing of a display device or a side frame of a display device, and the connection portion is located on a side of the backlight module adjacent to the middle casing of the display device.

In an embodiment of the present disclosure, the orthographic projection of the connection portion on a surface of one side of the display device on which the display panel is disposed falls within an effective display range.

In an embodiment of the present disclosure, the backlight module comprises a plurality of connection portions which are respectively disposed on one or more edges of four edges on the side of the backlight module adjacent to the middle casing of the display device.

In an embodiment of the present disclosure, the backlight module further comprises a backing plate, on which the connection portion is disposed.

In an embodiment of the present disclosure, the backlight module further comprises a plastic frame, on which the connection portion is disposed.

In an embodiment of the present disclosure, the connection portion and the back plate are of a unitary structure.

In an embodiment of the present disclosure, the connection portion and the plastic frame are of a unitary structure.

In an embodiment of the present disclosure, the middle casing is connected to the side frame.

According to another aspect of the present disclosure, there is provided a display device, comprising a side frame and a middle casing in the side frame; and the backlight module above mentioned, wherein the backlight module is connected to the middle casing or the side frame via the connection portion.

In an embodiment of the present disclosure, the backlight module is connected to the middle casing via the connection portion, and a first snap button is disposed on one end of the middle casing close to the side frame; the connection portion is interposed between the side frame and the end of the middle casing and comprises a first snap hole to be fitted with the first snap button.

In an embodiment of the present disclosure, the backlight module is connected to the side frame via the connection portion, and a second snap button is disposed on a side of the side frame close to the end of the middle casing; the connection portion is interposed between the side frame and the end of the middle casing and comprises a second snap hole to be fitted with the second snap button.

In an embodiment of the present disclosure, the backlight module is connected to the middle casing via the connection portion, and a first snap groove is disposed on one end of the middle casing close to the side frame; the connection portion is interposed between the side frame and the end of the middle casing and comprises a first snap hook to be fitted with the first snap groove.

In an embodiment of the present disclosure, the backlight module is connected to the side frame via the connection portion, and a second snap groove is disposed on a side of the side frame close to the end of the middle casing; the connection portion is interposed between the side frame and the end of the middle casing and comprises a second snap hook to be fitted with the second snap groove.

In an embodiment of the present disclosure, the backlight module is connected to the middle casing via the connection portion, and a first magnetic adsorption portion is disposed on a side of the middle casing close to the backlight module; the connection portion comprises a first magnet to be attracted to the first magnetic adsorption portion.

In an embodiment of the present disclosure, the backlight module is connected to the side frame via the connection portion, and a second magnetic adsorption portion is disposed on a side of the side frame close to the end of the middle casing; the connection portion is interposed between the side frame and the end of the middle casing and comprises a second magnet to be magnetically attracted to the second magnetic adsorption portion.

In an embodiment of the present disclosure, the side frame includes a fixing plate portion extending to a side of the middle casing away from the backlight module, and the fixing plate portion is connected to the middle casing via a fastener.

In an embodiment of the present disclosure, the display device further comprises a display panel on a side of the backlight module away from the middle casing, and a protective cover plate which is disposed on a side of the display panel away from the backlight module and is connected to the display panel.

In an embodiment of the present disclosure, the protective cover plate extends to an inner side wall of the side frame.

In an embodiment of the present disclosure, the middle casing is connected to the side frame.

DETAILED DESCRIPTION OF EMBODIMENTS

In order to reduce the size of the frame of the display device and increase the screen-to-body ratio of the display device, the embodiment of the present disclosure provides a backlight module and a display device. The present disclosure will be further described in detail in the following embodiments so as to clarify the objects, technical solutions and advantages of the present disclosure.

FIG. 1shows a cross-sectional structure of a mobile phone of the related art. The mobile phone of the related art includes: a display module105, a cover glass104fixed to a front side of the display module105, and a side frame102bonded to the cover glass104via the dispensed glue103. In order to ensure a bonding strength between the side frame102and the cover glass104, a width l of the dispensed glue103is usually not less than 0.8 mm. In order to avoid assembly interference between the display module105and the side frame102, a gap c between the display module105and the side frame102should be at least 0.3 mm. In this regard, the distance between the display module105and the edge of the cover glass104is at least above 1.1 mm, which results in a relatively large size of the frame of the mobile phone, thereby affecting the screen-to-body ratio of the mobile phone.

As shown inFIG. 2andFIG. 3, the backlight module31of the embodiment of the present disclosure comprises a connection portion30to be connected to a middle casing2and/or a side frame1of the display device, and the connection portion30is located on a side of the backlight module31adjacent to the middle casing2of the display device.

The structure of the backlight module generally includes a back plate311as well as a reflective sheet, a light guide plate, an optical film, and a light source on a back side of the back plate311. The backlight module31may further include a plastic frame connected to the back plate311. In some forms of backlight modules, a design having no back plate may also be used, and the plastic frame provides installation and support for internal components. There is no limitation to the specific arrangement of the connection portion30on the backlight module31, and the connection portion30may be disposed on the back plate311or the plastic frame of the backlight module31.

In a condition that the connection portion30is disposed on the back plate311, the connection portion30and the back plate311may be of a unitary structure, which may be integrally formed at the time of fabrication, thereby simplifying the process. In addition, in a condition that the connection portion is disposed on the plastic frame, the connection portion and the plastic frame may also be of a unitary structure, thereby being integrally formed at the time of fabrication, thereby simplifying the process.

In the technical solution of the above-mentioned embodiments of the present disclosure, the backlight module31may be connected to the middle casing2and/or the side frame1of the display device via the connection portion30. Because the connection portion30is located on a side of the backlight module31adjacent to the middle casing of the display device and it does not occupy the area of the frame. Therefore, the frame of the display device including such a backlight module31has a small frame size and a relatively large screen-to-body ratio.

As shown inFIG. 3toFIG. 10, the display device provided by the embodiment of the present disclosure includes a side frame1, as well as a middle casing2and the backlight module31of the foregoing embodiment which are disposed in the side frame1sequentially. The middle casing2is connected to the side frame1and the backlight module31is connected to the middle casing2or the side frame1via the connection portion30.

In the embodiment of the present disclosure, there is no limitation to the specific product type of the display device, it could be, for example, a mobile phone, a tablet computer, a smart wearable device, or the like.

Referring to the embodiment shown inFIG. 3, in addition to the above components, the display device further includes a display panel32on a side of the backlight module31away from the middle casing2, a protective cover plate4on a side of the display panel32away from the backlight module31, an appearance rear casing5on a side of the middle casing2away from the backlight module31, as well as a main board12, a camera module, an antenna module and the like which are disposed between the appearance rear casing5and the middle casing2. The middle casing2and the side frame1serve to support, limit and fix these components.

In the technical solution of the above embodiment of the present disclosure, the backlight module31is provided with the connection portion30on a side close to the middle casing2, and the backlight module31is connected to the middle casing2or the side frame1via the connection portion30. As may be seen fromFIG. 3, the orthographic projection of the connection portion30on the front side of the display device, that is, on a surface on a side of the display device on which the display panel32is disposed, falls within an effective display range of the display device. Therefore, the connection portion30does not need to occupy the area of the frame and the frame size of the display device may be designed to be small, and the screen-to-body ratio of the display device is relatively high. Compared with the prior art, the technical solutions provided by the foregoing embodiments of the present disclosure effectively improve the appearance and display quality of the product, and provide a better user experience.

In the embodiment of the present disclosure, the specific number and arrangement of the connection portions30may be correspondingly designed according to the specific product type of the display device and the required structural strength. For example, these connection portions30may be distributed on four edges, or two opposite edges, or three of the four edges of the side of the backlight module31adjacent to the middle casing2, to which there is no specific limitation.

As shown inFIG. 3, in an optional embodiment of the present disclosure, the backlight module31is connected to the middle casing2via the connection portion30. The specific construction is that, a first snap button2ais disposed on one end of the middle casing2close to the side frame1; the connection portion30is interposed between the side frame1and the end of the middle casing2, and comprises a first snap hole30ato be fitted with the first snap button2a.

As shown inFIG. 4, in another optional embodiment of the present disclosure, the backlight module31is connected to the middle casing2via the connection portion30. The specific construction is that, a first snap groove2bis disposed on one end of the middle casing2close to the side frame1; the connection portion30is interposed between the side frame1and the end of the middle casing2, and comprises a first snap hook30cto be fitted with the first snap groove2b.

As shown inFIG. 5, in yet another optional embodiment of the present disclosure, the backlight module31is connected to the side frame1via the connection portion30. The specific construction is that, a second snap button1ais disposed on a side of the side frame1close to the end of the middle casing2; the connection portion30is interposed between the side frame1and the end of the middle casing2, and comprises a second snap hole30bto be fitted with the second snap button1a.

As shown inFIG. 6, in yet another optional embodiment of the present disclosure, the backlight module31is connected to the side frame1via the connection portion30. The specific construction is that, a second snap groove1bis disposed on a side of the side frame1close to the end of the middle casing2; the connection portion30is interposed between the side frame1and the end of the middle casing2, and comprises a second snap hook30dto be fitted with the second snap groove1b.

As shown inFIG. 7, in an optional embodiment of the present disclosure, the backlight module31is connected to the middle casing2via the connection portion30. The specific construction is that, a first magnetic adsorption portion2cis disposed on a side of the middle casing2close to the backlight module31; the connection portion30comprises a first magnet30eto be magnetically attracted to the first magnetic adsorption portion2c.

The first magnetic adsorption portion2cis a magnet or a magnetic adsorption metal, and may protrude from a side surface of the middle casing2adjacent to the backlight module31. As shown inFIG. 7, the first magnetic adsorption portion2cis optionally embedded in the middle casing2and is flush with the side surface of the middle casing2close to the backlight module31, which contributes to reduce the thickness dimension of the display device. Further, as shown inFIG. 8, the middle casing2may be entirely made of a magnetic adsorbing material such as iron, and the first magnetic adsorption portion2cis specifically a region of the middle casing2to be attracted to the first magnet30e.

As shown inFIG. 9, in another optional embodiment of the present disclosure, the backlight module31is connected to the side frame1via the connection portion30. The specific construction is that, a second magnetic adsorption portion1cis disposed on a side of the side frame1close to the end of the middle casing2; the connection portion30may be interposed between the side frame1and the end of the middle casing2, and comprises a second magnet30fto be magnetically attracted to the second magnetic adsorption portion1c.

Similarly, the second magnetic adsorption portion1cmay also be a magnet or a magnetic adsorption metal. Optionally, the second magnetic adsorption portion1cis embedded in an inner wall of the side frame1and is flush with the inner wall of the side frame1so that it is not needed to occupy the area of the frame and the frame size of the display device may be designed to be relatively smaller. The side frame1may be entirely made of a magnetic adsorption material such as iron, and the second magnetic adsorption portion1cis specifically a region of the side frame1to be magnetically adsorbed/attracted to the second magnet30f.

As shown inFIG. 10, in an alternative embodiment of the present disclosure, the backlight module31further includes a plastic frame312. The connection portion30is disposed on the plastic frame312, the plastic frame312is connected to the back plate311via the connection portion30, and the connection portion30may be implemented in any structural form of the foregoing embodiments. It is noted that, in the design solution of some embodiments, the structure of the backlight module may only include a plastic frame, not including the back plate, and the connection portion is disposed on the plastic frame. For example, the connection portion and the plastic frame are of a unitary structure.

The specific connection manner of the side frame1and the middle casing2is not limited, as shown inFIGS. 3-10. In these embodiment, the side frame1includes a fixing plate portion11extending to the side of the middle casing2away from the backlight module31. The fixing plate portion11and the middle casing2are connected with a fastener6, and the fastener6may be a conventional screw or the like. In addition, the fixing plate portion11of the side frame1and the middle casing2may be fixed by other means such as snap-fit.

It will be apparent to those skilled in the art that variations and modifications may be made in the present disclosure without departing from the spirit and scope of the disclosure. Thus, the present disclosure is also intended to cover such modifications and variations, if such modifications and variations are within the scope of the appended claims and their equivalents.