CN216561308U - Backlight plate, backlight module and display device - Google Patents

Abstract

The embodiment of the application provides a backlight plate, including backplate, center support and center, the center includes first framework and second framework, and the second framework is connected in the edge of first framework to relative first framework is buckled. The center support includes connecting plate, first mounting panel, second mounting panel, supporting part, limiting plate and transparency, and first mounting panel is connected in the connecting plate. The second mounting panel is located the same side of connecting plate with first mounting panel. The transparent piece is including the first transparent and the second transparent that are connected, and first transparent sets up in the surface of limiting plate, and the second transparent sets up in the surface of first mounting panel. Through setting up the transparency, make the light of light source transmission can get into in the transparency to carry out the diffusion outgoing along the transparency, make the light at display area edge can improve display area edge luminance via the complete outgoing of transparency, avoid the local bright spot phenomenon at display area edge. In addition, the embodiment of the application also provides a backlight module and a display device.

Description

Backlight plate, backlight module and display device

Technical Field

The application relates to the field of consumer electronics, in particular to a backlight plate, a backlight module and a display device.

Background

In related art direct type display devices, a light source is mounted on a backlight plate, and after the light source is driven, light is homogenized through an optical module, and the homogenized light enters a display panel to present various images.

In the related art, because the light source has a certain light-emitting angle when emitting light, the brightness is diffused outwards from the center, the brightness is gradually reduced, and in order to make the display picture of the display device more uniform, the light source arrangement is in a certain gap, the light rays between adjacent light sources are overlapped, the brightness is improved, and the brightness of the display picture is uniform. However, the light emitted from the light source near the edge of the display device is less overlapped with other light sources, so that the brightness is low and uneven, and part of the light is shielded by the middle frame and cannot be emitted outwards, so that the display image of the display device shows a local bright spot phenomenon, and the display image is not favorable for a user to watch.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a backlight plate, a backlight module and a display device, so as to improve the above technical problems.

In a first aspect, an embodiment of the present application provides a backlight panel, which includes a back plate for mounting a light source assembly, a middle frame support, and a middle frame, where the middle frame includes a first frame body and a second frame body, and the second frame body is connected to an edge of the first frame body and is bent relative to the first frame body. The center support comprises a connecting plate, a first mounting plate, a second mounting plate, a supporting part, a limiting plate and a transparent part, wherein the first mounting plate is used for bearing the optical module and is connected to the connecting plate. The second mounting panel is used for bearing the weight of display panel and is located the homonymy of connecting plate with first mounting panel, forms the clearance that supplies to set up optical module between first mounting panel and the second mounting panel. The supporting part is connected to the surface of the first mounting plate far away from the second mounting plate and is supported on the middle frame. The limiting plate is used for pressing against the light source assembly, is connected to the end, far away from the connecting plate, of the second mounting plate and bends towards the direction of the back plate. The transparent piece is including the first transparent and the second transparent that are connected, and first transparent sets up in the surface that deviates from the backplate of limiting plate, and the second transparent sets up in the surface of the orientation second mounting panel of at least partial first mounting panel, and the surface parallel and level of the orientation second mounting panel of second transparent and second mounting panel.

In a second aspect, an embodiment of the present application further provides a backlight module, which includes the above-mentioned backlight panel and an optical module, wherein a portion of the optical module is embedded in the gap and supported by the first mounting plate.

In a third aspect, an embodiment of the present application further provides a display device, which includes a display panel and the backlight module, where the display panel is mounted on the second mounting board and is located on a side of the optical module, which is far away from the backplane.

The utility model provides a board and backlight unit in a poor light, center support are used for supporting optical module and display panel, through setting up the transparency at limiting plate and first mounting panel for be close to in the light of the light source transmission at display area edge can get into the transparency, and spread the outgoing along the transparency, make the light at display area edge can improve display area edge luminance via the complete outgoing of transparency, avoid the local bright spot phenomenon at display area edge. The display device using the backlight plate can enable the display brightness of the display panel to be more uniform.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a partial structural schematic diagram of a display device shown in an embodiment of the present application at a viewing angle.

Fig. 2 is a schematic structural diagram of a middle frame in a display device according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a second middle frame in a first viewing angle according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a second middle frame at a second viewing angle according to an embodiment of the present application.

Fig. 5 is a schematic view of a partial installation structure of a light source according to an embodiment of the present application.

Fig. 6 is a schematic distribution diagram of transparent bumps according to an embodiment of the present application.

Fig. 7 is a partial structural schematic diagram of a display device shown in an embodiment of the present application at another viewing angle.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The existing display device, in order to reduce the problem of low edge brightness of the display area and local bright spots, generally, a reflecting sheet is arranged at the position of the backlight plate close to the edge of the display area, and part of light is reflected by the reflecting sheet so as to achieve the purpose of improving the edge brightness and uniformity of the display area.

Based on this, the inventors of the present application have proposed the backlight plate, the backlight module and the display device of the embodiments of the present application in order to improve the above-mentioned defects. Embodiments of the present application are described in detail below with reference to the accompanying drawings.

The plane direction mentioned in this embodiment refers to a plane direction along a plane where the display panel is located, and the thickness direction refers to a thickness direction of the display device and is perpendicular to the plane direction where the display panel is located, which is not described in detail below.

As shown in fig. 1, the present embodiment provides a display device 10, the display device 10 includes a backlight module 40 and a display panel 20, and the display panel 20 is assembled on the backlight module 40. The display panel 20 may be a liquid crystal panel, or may be a panel of another form, which is not limited herein. It is understood that the display device 10 may be configured as a television, display, or the like.

In one embodiment, the backlight module 40 may include a backlight plate 100, an optical module 150, and a light source 170, wherein the optical module 150 and the light source 170 are mounted on the backlight plate 100 and are used for providing an excitation light for the display panel 20.

Specifically, in the embodiment, as shown in fig. 1, the backlight panel 100 includes a back panel 300, a middle frame bracket 400 and a middle frame 200, the back panel 300 is assembled to the middle frame 200 and connected to the middle frame 200, the back panel 300 forms an accommodating cavity, and the middle frame bracket 400 is supported on the back panel 300.

Referring to fig. 1 and fig. 2, the middle frame 200 includes a first frame 210 and a second frame 230, the first frame 210 has a mounting hole 250, the first frame 210 substantially encloses a ring structure, and the mounting hole 250 is located in the middle of the first frame 210. The second frame 230 is connected to an outer edge of the first frame 210, and is bent toward one side of the first frame 210 with respect to the first frame 210 to form a substantially L-shaped structure, and the second frame 230 also encloses a ring-shaped structure as a side frame of the display device 10. As shown in fig. 2, the second frame body 230 includes a first side 231 and a second side 232 having a long side direction (X direction in fig. 2), and a third side 233 and a fourth side 234 having a short side direction (Y direction in fig. 2), the first side 231 and the second side 232 are disposed opposite to each other, the third side 233 and the fourth side 234 are disposed opposite to each other, the third side 233 is connected between the first side 231 and the second side 232, the fourth side 234 is connected between the first side 231 and the second side 232, and the first side 231, the second side 232, the third side 233 and the fourth side 234 enclose a substantially rectangular shape. It is understood that the connection of the first side 231, the second side 232, the third side 233 and the fourth side 234 may be designed as a rounded corner or an arc transition. Similarly, the structure of the first frame 210 is substantially the same as that of the second frame 230, and is not described herein again.

As just one example, the aspect ratio of the first frame body 210 may be, for example, 16: 9. 4: an equal ratio of 3, i.e. the approximate ratio of the first side 231 and the second side 232 in the length direction to the third side 233 and the fourth side 234 in the width direction, may be 16: 9. 4: 3, etc.

Referring to fig. 1 again, the back plate 300 includes a bottom plate 310 and a side plate 330, the side plate 330 is connected to an edge of the bottom plate 310 and is bent relative to the bottom plate 310, the bottom plate 310 and the side plate 330 enclose an accommodating cavity, the bottom plate 310 is overlapped on the first frame 210 and closes the mounting hole 250, the side plate 330 and the second frame 230 are disposed substantially parallel to each other, and a space may be provided between the side plate 330 and the second frame 230. In other embodiments, the side plate 330 may be abutted against the second frame 230.

In one embodiment, the back plate 300 and the middle frame 200 may be fixed by an adhesive, and in this case, an adhesive layer may be disposed on the first frame 210, and the bottom plate 310 may be fixed to the middle frame 200 by an adhesive. In some embodiments, the first frame body 210 of the middle frame 200 may also be provided with a plurality of screw holes, and the screw holes are fixedly connected with the back plate 300 through screws to form a fixing, and the plurality of screw holes may be distributed in the entire circumference of the first frame body 210 to ensure the connection stability between the middle frame 200 and the back plate 300.

Referring to fig. 1 and fig. 3 together, in the present embodiment, the middle frame support 400 includes a first middle frame 401 and a second middle frame 405, wherein the first middle frame 401 includes a connection plate 450 and a second installation plate 430, the second installation plate 430 is used for carrying the display panel 20 and is connected to the connection plate 450, the second installation plate 430 is located at one side of the connection plate 450, the first middle frame 401 forms a substantially inverted "L" shaped structure, and the connection plate 450 and the second frame are attached to each other to form a fixed structure. The middle frame bracket 400 may also be an integrated structure, for example, the first middle frame 401 and the second middle frame 405 may be integrally formed, and in this case, the first mounting plate 410 may be directly connected to the connecting plate 450, which is not particularly limited herein.

The second middle frame 405 includes a first mounting plate 410, a limiting plate 490, a transparent member 480 and a supporting portion 470, wherein the first mounting plate 410 is used for carrying the optical module 150 and is connected to the supporting portion 470. And is located on the same side of the connection plate 450 as the first mounting plate 410, and a gap 411 for disposing the optical module 150 is formed between the first mounting plate 410 and the second mounting plate 430. The first mounting board 410 and the second mounting board 430 are substantially parallel to each other, so that the optical module 150 and the display panel 20 are substantially parallel to the optical module 150 after being assembled, and thus the light emitted from the light source 170 when being disposed on the fixed surface can be directly incident on the display panel 20. The support portion 470 and the connection plate 450 are attached to each other to form a support. The first middle frame 401 and the second middle frame 405 may be fixed to each other by adhesion, or may be connected and fixed by a connector such as a screw or a clip.

As an embodiment, for more stable fixing of the optical module 150, an end of the first mounting board 410 away from the connecting board 450 may protrude from an end of the second mounting board 430 away from the connecting board 450, so that the optical module 150 may have a larger carrying area.

Referring to fig. 1, a surface of the connecting plate 450 away from the second middle frame 405 abuts against the second frame 230 and can be completely attached to the second frame 230. In order to improve the sealing performance of the display device 10 and avoid light leakage from the gap between the second frame 230 and the middle frame 400, in some embodiments, a sealing member may be disposed on a surface of the second frame 230 facing the accommodating cavity, the sealing member is disposed on a portion of the second frame 230 protruding from the side plate 330, and the connecting plate 450 abuts against the sealing member. The sealing member may be a resilient object such as a foam or rubber ring, and may interfere with the connection plate 450 to enhance the sealing performance, and the interference range may be about 0.15mm, for example. Through setting up the sealing member, the light of the light source 170 who holds the intracavity can not leak from the clearance 411 between connecting plate 450 and the second frame body 230, avoids the light leak phenomenon, also can play waterproof dirt-proof effect simultaneously.

In a more specific embodiment, the supporting portion 470 is connected to a surface of the first mounting plate 410 away from the second mounting plate 430, and the supporting portion 470 is supported on the back plate 300. Specifically, in the present embodiment, referring to fig. 3 and fig. 4, the supporting portion 470 includes a first supporting plate 475 and a second supporting plate 476, the first supporting plate 475 is connected to a surface of the first mounting plate 410 away from the second mounting plate 430, the second supporting plate 476 is connected to a surface of the first mounting plate 410 away from the second mounting plate 430, and the second supporting plate 476 is spaced apart from the first supporting plate 475 and is located on a side of the first supporting plate 475 away from the connecting plate 450, that is, the first supporting plate 475 is closer to the connecting plate 450 than the second supporting plate 476. The first support plate 475 is supported by the first frame 210, and the second support plate 476 is supported by the bottom plate 310 and contacts with the bottom plate 310 to form a two-point support structure, which can improve the stability of the second middle frame 405. It is understood that in some other embodiments, only the first support plate 475 or the second support plate 476 may be provided, or in some embodiments, the support part 470 may be provided with three or more support plates, and when the number of the support plates is more than three, the plurality of support plates may be provided in parallel with each other at a distance.

Referring to fig. 1, the side plate 330 surrounds the edge of the bottom plate 310, the side plate 330 is embedded between the first supporting plate 475 and the second supporting plate 476, and the side plate 330 is limited by the first supporting plate 475 and the second supporting plate 476, so that the back plate 300 is completely fixed. The side plate 330 may further be provided with a connecting buckle cooperating with the first supporting plate 475 and/or the second supporting plate 476 to achieve relative fixation with the supporting portion 470. The end surface of the side plate 330 away from the bottom plate 310 may be supported by the first mounting plate 410, so as to support the first mounting plate 410.

In some embodiments, the supporting portion 470 may further include a connecting portion (not shown) for connecting with the back plate 300, and in particular, the connecting portion may be connected with the back plate 300 by a snap-fit manner. In one embodiment, the connection part may be connected to the bottom plate 310 to fix the middle frame bracket 400 and the back plate 300 to each other. At this time, since the connecting portion is connected to the bottom plate 310, and the first mounting plate 410 abuts against the surface of the side plate 330 away from the bottom plate 310, the degree of freedom of the middle frame bracket 400 in the thickness direction is bidirectionally fixed by the side plate 330 and the bottom plate 310, and the middle frame bracket 400 cannot be displaced in the thickness direction, thereby ensuring the mounting stability of the middle frame bracket 400.

The limiting plate 490 is connected to the end of the first mounting plate 410 away from the connecting plate 450, and is bent towards the bottom plate 310, an interval is formed between the end of the limiting plate 490 away from the first mounting plate 410 and the bottom plate 310, and the end of the limiting plate 490 away from the first mounting plate 410 can be abutted against the light source 170 to limit the light source 170, so that the light source 170 is prevented from being displaced in the thickness direction. The included angle between the limiting plate 490 and the first mounting plate 410 may be 135 ° to 165 °, for example, and in some embodiments, a reflective film may be further attached to the limiting plate 490, so as to reflect light toward the optical module 150, thereby improving the light efficiency. Through setting up limiting plate 490, can be so that light source 170 directly be pressed to fixed, consequently light source 170 need not to be connected with bottom plate 310 through the viscose, and the light source 170 that appears when can effectively preventing to adopt the viscose fixed connects unstablely like this, avoids the emergence of the marginal warpage phenomenon of light source 170.

The limiting plate 490, the first mounting plate 410, the supporting portion 470 and the like may be made of non-transparent materials and may be combined in an integrated manner.

The transparent member 480 is made of a transparent material, such as glass, transparent plastic, etc. The transparent member 480 includes a first transparent member 481 and a second transparent member 482 connected to each other, the first transparent member 481 is disposed on a surface of the position-limiting plate 490 facing away from the bottom plate 310 of the backplate 300, and is adjacent to the bottom plate 310 and the light source 170 disposed on the bottom plate 310, and the first transparent member 481 may partially protrude from an end of the position-limiting plate 490 away from the first mounting plate 410. The second transparent member 482 is disposed on at least a portion of a surface of the first mounting board 410 facing the second mounting board 430, and a portion of the surface of the first mounting board 410 away from the connection plate 450 is provided with a step 412, and the second transparent member 482 is embedded at the step 412 such that the second transparent member 482 is flush with the surface of the second mounting board 430 facing the second mounting board 430. The first mounting board 410 and the second transparent member 482 can be used for carrying the optical module 150.

In this embodiment, the optical module 150 is disposed in the accommodating cavity, at least partially embedded in the gap 411 between the first mounting board 410 and the second mounting board 430, and supported by the first mounting board 410, and in some embodiments, the distance between the first mounting board 410 and the second mounting board 430 may be approximately 1-3mm to adapt to the thickness of the optical module 150. The width of the second mounting plate 430 may be, for example, 5.5-6 mm.

In this embodiment, the optical module 150 includes an optical film 153 and a diffusion plate 151, the diffusion plate 151 is supported on the first mounting board 410 and the second transparent member 482, and the optical film 153 is disposed on a side surface of the diffusion plate 151 facing away from the bottom plate 310. The diffusion plate 151 can transmit light and mainly plays a role of diffusing and homogenizing light, and the optical film 153 can be one or more and can play a role of filtering and limiting light with specified wavelength, for example, only red light, green light or blue light can pass through. It is understood that the optical film 153 may also be disposed on the side of the diffusion plate 151 near the bottom plate 310, and the optical film 153 is supported on the first mounting plate 410. In other embodiments, the optical module 150 may include only the optical film 153 or more components, which are not limited herein.

The optical module 150 may be fixed to the first mounting plate 410 and the second transparent member 482 by an adhesive method, or a separate fixing member may be provided for fixing the optical module 150, at this time, a through hole may be formed in the optical module 150, and the fixing member passes through the through hole to fix the optical module 150 to the first mounting plate 410, where the number of the fixing members may be one or more, and is not limited herein.

Referring to fig. 1 and 3 again, the light source 170 may be a dot-matrix light source 170, and is formed by a plurality of light beads 171 integrated on the lamp panel, and the plurality of light beads 171 may be laser light beads, LED light beads, or the like. The light sources 170 may be fixed to the base plate 310 by bonding, screwing, etc., and the light sources 170 may be integrated on a PCB, and integrally assembled on the base plate 310 of the back plate 300, and emit light toward the optical module 150. In this embodiment, the light source 170 is disposed on the first bottom plate 311 of the bottom plate 310 and disposed toward the display panel 20, that is, the direct-type light source 170 is adopted, light emitted from the light source 170 is incident on the optical module 150 along the optical axis direction, and after being uniformly expanded by the optical module 150, the light passes through the optical module 150 to form excitation light and is incident on the display panel 20, so that the display panel 20 performs image display. The optical axis of the light source 170 is substantially perpendicular to the plane of the optical module 150. When the light source 170 emits light, the light emitted from the light source 170 adjacent to the limiting plate 490 and the first transparent member 481 may enter the first transparent member 481 and the second transparent member 482 and exit through the surface of the first transparent member 481 and the surface of the second transparent member 482, and since the light is transmitted isotropically when being transmitted in the first transparent member 481 and the second transparent member 482, the uniformity of the light is better, and the bright and dark spots at the edge of the display area 21 may be avoided.

In order to make the light beam emit toward the optical module 150 after entering the transparent member 480, the utilization rate of the light beam is increased. In some embodiments, referring to fig. 4 and 5, a plurality of transparent bumps 483 are spaced apart from the surface of the transparent member 480 facing away from the bottom plate 310, the plurality of transparent bumps 483 can also transmit light, and during the light exiting process, the transparent bumps 483 can deflect the light exiting angle, so that the light is deflected toward the optical module 150, and further, most of the light can be emitted to the optical module 150 and finally enter the display panel 20. In addition, the transparent bumps 483 can make the light uniform in all directions during the process of deflecting the light, so that the display brightness at the edge of the display area 21 is more uniform. Transparent bump 483 may be made of the same material as transparent member 480 so that an interface is not formed therebetween. In one embodiment, transparent bump 483 can be a bump with a radius of 0.5-3 mm. Transparent bumps 483 are provided on both the first transparent member 481 and the second transparent member 482.

Since the second transparent member 482 is farther from the light source 170 than the first transparent member 481, the light entering the transparent member 480 is gradually deflected by the transparent bumps 483 toward the optical module 150, and the light reaching the second transparent member 482 is gradually reduced, so that the display brightness in this area is lower. In order to further improve the display brightness and the light utilization rate of the transparent member 480 in the area away from the light source 170, in some embodiments, as shown in fig. 6, the distribution density of the transparent bumps 483 disposed on the second transparent member 482 may be greater than the distribution density of the transparent bumps 483 disposed on the first transparent member 481, so that when light enters the second transparent member 482, most of the light can be deflected toward the optical module by the transparent bumps 483 disposed on the second transparent member 482. In particular, the distribution density of the transparent bumps 483 may be set to be reduced as the distance between the transparent member 480 and the base plate 310 increases. In this way, the entire transparent member 480 can be made to have uniform display brightness at any position during the process of reflecting light. It is understood that the distribution density of the transparent bumps 483 may be varied linearly or non-linearly, which is not limited herein.

In the process of emitting light from the lamp beads 171, because a certain gap is always formed between the edges of the lamp beads 171 and the limiting plate, the light emitted from the lamp beads 171 located at the edges may still form an edge bright line phenomenon. For this reason, as an implementation manner, one end of the first transparent member 481 far from the second transparent member 482 is provided with a plurality of accommodating grooves 487, an opening of each accommodating groove 487 faces a direction far from the connecting plate, and the number of the accommodating grooves 487 may be the same as the number of the lamp beads 171 near the edge of the limiting plate. The lamp pearl that is close to the edge can the one-to-one set up in storage tank 487, and the benefit of this kind of mode of setting lies in: most of the light emitted from the lamp beads in the accommodating groove 487 can directly enter the first transparent member 481 and exit through the first transparent member 481 and the second transparent member 482, so that the brightness of the edge of the display area can be further improved, and the display brightness difference with other display areas can be reduced. The receiving groove 487 may be configured to cooperate with the structure of the lamp bead, for example, a strip-shaped groove, a rectangular groove, etc., which is not limited herein. In this embodiment, the accommodating groove 487 is an arc-shaped groove, and the arrangement manner of the arc-shaped groove is adopted, so that when the lamp bead emits light, the distance between the light emitted from each direction and the first transparent part 481 is approximately equal, and therefore, the light emitted from the lamp bead can enter the first transparent part 481 in equal proportion in each direction, and it is ensured that the display brightness in the edge region of the display area is more uniform.

In order to avoid the phenomenon that the light is too concentrated at the position of the first transparent member 481 close to the light source 170, and the display area 21 of the display panel 20 corresponding to this area appears bright spots, an edge of the first transparent member 481 adjacent to the accommodating groove 487 may be provided with an oblique angle 488, the oblique angle 488 is inclined relative to the plane where the bottom plate of the back plate is located, and the oblique angle 488 has an oblique surface, so that the light may also be deflected. The angle of inclination 488 may be, for example, 15-75 °, and is not limited thereto. By providing the bevel 488, when the light emitted from the light source enters the first transparent member 481, a part of the light is directly deflected outwards by the bevel 488, and therefore, the light is not excessively concentrated at the position of the first transparent member 481 close to the light source, and the bright spot phenomenon in the display area of the display panel corresponding to the area is avoided.

In other embodiments, the transparent bumps 483 may not be provided, and at this time, a rough surface may be provided on the surface of the transparent member 480 away from the backplane, and light is scattered outward by using a scattering effect of the rough surface, so as to improve the light uniformity in this area and avoid the occurrence of bright spots and dark spots.

The display panel 20 is mounted on the surface of the second mounting board 430 away from the first mounting board 410, and is disposed substantially parallel to the optical module 150, and the display panel 20 is located on a side of the optical module 150 away from the rear panel 300. The display panel 20 includes a display area 21 and a non-display area 22 adjacent to the display area 21, the non-display area 22 is located on a side of the display area 21 close to the middle frame, the non-display area 22 is disposed corresponding to the second mounting board, and in some embodiments, the display area 21 is at least partially disposed corresponding to the second mounting board, so that a display image of the display area 21 can block an edge of the second mounting board, and occurrence of an edge bright line phenomenon is reduced. The display panel 20 may be disposed on the second mounting plate 430 by bonding, and further, in order to better protect the display panel 20, foam 23 may be disposed between the display panel 20 and the second mounting plate 430 to serve as a buffer. The display panel may be an LED panel, an LCD panel, or the like, and is not limited herein.

As shown in fig. 7, in order to meet the expansion and contraction requirements of the diffuser 151 of the optical module 150, when the optical module 150 composed of the diffuser 151 and the optical film 152 is extended into the gap 411, at least a portion of the non-display area 22 of the display panel 30 is covered, i.e., the edge of the optical module 150 is closer to the middle frame 200 than the edge of the display area 21, so as to prevent the bright lines from appearing between the display area 21 and the non-display area 22, but at some specific viewing angles, the bright lines generated at the edge of the display area 21 may still be seen from the side of the display panel 20 by the user. To avoid this, in a more specific embodiment, the surface of the first mounting board 410 facing the second mounting board 430 is provided with an optical absorption glue 155, and the optical module 150 is adhered to the optical absorption glue 155, on the one hand, to fix the optical module 150; on the other hand, since the light-absorbing glue 155 has a certain function of absorbing light, when the light propagates to the second transparent member 482 and reaches the edge of the optical module 150, a part of the light is absorbed by the light-absorbing glue 155, so that the light does not escape toward the middle frame 200, thereby avoiding the bright line phenomenon. The light absorption adhesive 155 may be a black adhesive, a black double-sided adhesive, or the like, which is not limited herein. When the light absorbing glue 155 is disposed, the light absorbing glue 155 may be disposed corresponding to the non-display area 22, that is, the light absorbing glue 150 does not exceed a boundary between the display area 21 and the non-display area 22, and a distance a between an edge of the optical module 150 close to the middle frame 200 and an edge of the light absorbing glue 155 far from the middle frame 200 is smaller than a distance D between an edge of the optical module 150 close to the middle frame 200 and a boundary between the display area 21 and the non-display area 22, so that the light absorbing glue 155 does not affect the display brightness of the display area 21, the display brightness of the display area C corresponding to the second transparent body 482 is uniform, and the problem of bright lines at the boundary between the non-display area 22 and the display area 21 under certain viewing angles can be reduced.

The display device 10 provided in the present embodiment can be assembled as follows:

the back plate 300 is assembled and fixed with the middle frame 200, the light source 170 is installed on the bottom plate 310, then the middle frame support 400 is pressed down along the side plate 330, at this time, the side plate 330 is embedded between the first supporting plate 475 and the second supporting plate 476, and the middle frame support 400 is fixed with the middle frame 200 and the back plate 300. Then, the optical module 150 is assembled in the receiving cavity by a drawer-type assembly method, and partially extends into the gap 411 and is adhered to the light-absorbing adhesive 155, so that the optical module 150 is fixed in the plane direction. Finally, the double-sided tape is disposed on the second mounting board 430, and the display panel 20 is adhesively attached to the second mounting board 430, with the display panel 20 being supported by the second mounting board 430.

In the display device 10 provided in this embodiment, the transparent member 480 is disposed, so that the light near the edge of the light source 170 can be guided to the optical module 150, thereby improving the utilization rate of the light source 170, and meanwhile, the bright spots or dark spots with different brightness are not easily formed near the edge of the light source 170, so as to improve the display brightness and the display uniformity of the display panel 20.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (14)

1. A backlight board is characterized by comprising a back board for mounting a light source assembly, a middle frame support and a middle frame, wherein the middle frame comprises a first frame body and a second frame body, and the second frame body is connected to the edge of the first frame body and is bent relative to the first frame body;

the center frame support includes:

a connecting plate;

the first mounting plate is used for bearing the optical module and is connected to the connecting plate;

the second mounting plate is used for bearing a display panel and is positioned on the same side of the connecting plate as the first mounting plate, and a gap for arranging an optical module is formed between the first mounting plate and the second mounting plate;

the supporting part is connected to the surface, far away from the second mounting plate, of the first mounting plate and is supported on the middle frame;

the limiting plate is used for pressing against the light source assembly, is connected to one end, far away from the connecting plate, of the second mounting plate and is bent towards the direction of the back plate; and

transparent, transparent including the first transparent and the second transparent that are connected, first transparent set up in deviating from of limiting plate the surface of backplate, the second transparent set up in at least part the orientation of first mounting panel the surface of second mounting panel, just the second transparent with the orientation of second mounting panel the surface parallel and level of second mounting panel.

2. The backlight panel of claim 1, wherein the surface of the transparent member facing away from the back plate is spaced apart by a plurality of transparent bumps.

3. The backlight panel of claim 2, wherein the distribution density of the transparent protrusions decreases with increasing distance from the back sheet.

4. The backlight panel of claim 1, wherein the first transparent member is provided with a plurality of receiving grooves at an end thereof remote from the second transparent member.

5. The backlight of claim 4, wherein the receiving groove is an arc-shaped groove.

6. The backlight panel of claim 4, wherein the edge of the first transparent member adjacent to the receiving groove is provided with a bevel.

7. The backlight panel according to claim 1, wherein the middle frame bracket comprises a first middle frame and a second middle frame, the first middle frame comprises the second mounting plate and the connecting plate, the second middle frame comprises the supporting portion, the first mounting plate, the limiting plate and the transparent member, and the supporting portion is attached to a surface of the connecting plate.

8. The backlight panel according to claim 1 or 7, wherein the support part comprises a first support plate and a second support plate, the first support plate is connected to a surface of the first mounting plate away from the second mounting plate, the second support plate is connected to a surface of the first mounting plate away from the second mounting plate, and the second support plate is spaced apart from the first support plate and located on a side of the first support plate away from the connecting plate.

9. The backlight panel of claim 8, wherein the back panel comprises a bottom panel and side panels surrounding edges of the bottom panel, the side panels being embedded between the first and second support panels.

10. A backlight module, comprising:

the backlight panel of any one of claims 1-9; and

an optical module partially embedded in the gap and supported by the first mounting plate.

11. A backlight module according to claim 10, wherein the optical module comprises:

a diffuser plate partially embedded in the gap and supported by the first mounting plate; and

an optical film disposed on a surface of the diffuser plate distal from the backplate.

12. A display device, comprising:

a display panel; and

the backlight module as claimed in claim 10 or 11, wherein the display panel is mounted on the second mounting board and located on a side of the optical module away from the back plate.

13. The display device according to claim 12, wherein a surface of the first mounting board facing the second mounting board is provided with an optical absorption glue, and the optical module is adhered to the optical absorption glue.

14. The display device according to claim 13, wherein the display panel includes a display area and a non-display area adjacent to the display area, the non-display area is located on a side of the display area close to the middle frame, and the light-absorbing glue is disposed corresponding to the non-display area.

Images