Backlight module and display device

Abstract

A backlight module (20) and a display device. The backlight module (20) comprises a backplate body (21), a limiting member (22), and a plurality of light strips (23), wherein the plurality of light strips (23) and the limiting member (22) are arranged on the same side of the backplate body (21), and the limiting member (22) is fixed to the light strips (23).

Description

Backlight module and display device

[0001] The present application claims priority to the Chinese patent application No. 202422382586.4, filed on September 27, 2024, and entitled "Backlight module and display device", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of display, in particular to a backlight module and a display device. BACKGROUND

[0003] Display devices have the advantages of lightness, thinness, low power consumption, etc., and are widely used in modern information equipment. Since the display panel itself does not have the light emitting characteristic, it needs to rely on the backlight module to supply sufficient and uniformly distributed light source to achieve the display function. Therefore, the performance of the backlight module directly affects the quality of the liquid crystal display.

[0004] At present, in order to perfectly present the picture level details, the backlight module needs to use the zoning light control technology. However, there are many optical schemes that meet the zoning light control, and the positioning and fixing methods of the light bar and the backboard main body under different optical schemes are also different. TECHNICAL PROBLEM

[0005] In the prior art, the design of adding a positioning bump on the backboard main body can only be applied to one optical scheme of zoning light control, and the compatibility is poor. When applied to other optical schemes of zoning light control, the whole backboard main body often needs to be re-molded to match other designs, or re-molded, which will cause the extension of the construction period and the increase of the cost. TECHNICAL SOLUTION

[0006] In a first aspect, the embodiments of the present application provide a backlight module, comprising:

[0007] a backboard main body;

[0008] a limiting piece;

[0009] a light bar, the light bar and the limiting piece are arranged on the same side of the backboard main body, and the limiting piece is fixed with the light bar.

[0010] In a second aspect, the embodiments of the present application also provide a display device, comprising:

[0011] a backlight module, the backlight module comprising: a backboard main body; a limiting piece; and a light bar, the light bar and the limiting piece are arranged on the same side of the backboard main body, and the limiting piece is fixed with the light bar; BENEFICIAL EFFECTS

[0012] The backlight module and the display device provided by the embodiments of the present application, the backlight module comprises a backboard body, a limiting piece and a plurality of lamp strips, the limiting piece and the plurality of lamp strips are arranged on the backboard body, the limiting piece is fixed with the lamp strips, so as to fix the relative position of the lamp strips and the backboard body or the relative position between the lamp strips, and then maintain the stability of the backlight module. One backboard body provided by the embodiments of the present application can be applied to a plurality of partitioned light control optical schemes, only the position of the limiting piece needs to be changed to adapt to different lamp strip distribution, so as to meet different partitioned light control optical schemes. BRIEF DESCRIPTION OF DRAWINGS

[0013] FIG. 1 is a structural schematic diagram of a backlight module in the prior art.

[0014] FIG. 2 is a first structural schematic diagram of a backlight module provided by the embodiments of the present application.

[0015] FIG. 3 is a second structural schematic diagram of a backlight module provided by the embodiments of the present application.

[0016] Embodiments of the present application

[0017] 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. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0018] Please refer to FIG. 1, which is a structural schematic diagram of a backlight module in the prior art. The display device has the advantages of lightness, thinness, low power consumption and the like, and is widely used in modern information equipment. Since the display panel itself does not have the light emitting characteristic, it needs to rely on the backlight module 10 to supply sufficient and uniformly distributed light source to achieve the display function, and therefore the performance of the backlight module 10 directly affects the quality of the liquid crystal display.

[0019] At present, in order to perfectly present the picture level details, the backlight module 10 needs to use the partitioned light control optical scheme. However, there are many optical schemes that meet the partitioned light control, and the positioning and fixing mode of the lamp strip 12 and the backboard body 11 under different optical schemes are also different. In the prior art, the design of adding the positioning convex 111 on the backboard body 11 can only be applied to one partitioned light control optical scheme, and the compatibility is poor. When applied to other partitioned light control optical schemes, the whole backboard body 11 often needs to be re-molded to match other designs, or to be re-molded, which will cause the extension of the construction period and the increase of the cost.

[0020] Therefore, it is necessary to provide a backlight module and a display device to solve the above technical problems.

[0021] Please refer to FIG. 2 and FIG. 3, FIG. 2 is a first structure schematic diagram of the backlight module provided by the embodiment of the application, and FIG. 3 is a second structure schematic diagram of the backlight module provided by the embodiment of the application. The embodiment of the application provides a backlight module and a display device, which can be compatible with different partition light control schemes.

[0022] The embodiment of the application provides a backlight module 20, which comprises a backboard body 21, a limiting piece 22 and a lamp strip 23. The lamp strip 23 and the limiting piece 22 are arranged on the same side of the backboard body 21, and the limiting piece 22 is fixed with the lamp strip 23.

[0023] Please continue to refer to FIG. 3. The backboard body 21 should have certain strength and fireproof characteristics as a large-area support structure. The material of the backboard can be metal or plastic.

[0024] In the optical scheme of partition light control, the backboard body 21 is divided into a plurality of light-emitting areas with different shapes or equal shapes, and the brightness and contrast of the light-emitting structure in each light-emitting area are also different, thereby improving the level of the picture and the detail performance.

[0025] A plurality of lamp strips 23 can be arranged in each light-emitting area, and the lamp strip 23 is a carrier of a light-emitting unit 231. The light-emitting unit 231 can be a mini LED, a micro LED or a general LED. Please refer to FIG. 2, which takes two adjacent lamp strips 23 as an example. In fact, the number of lamp strips is more than two, and the adjacent lamp strips 23 can have a fixed distance to improve the light-emitting uniformity of the backlight module 20. The lamp strip 23 can be divided into straight lamp strips, U-shaped lamp strips, lamp plates, fishhook-shaped lamp strips and the like according to shapes.

[0026] However, in different optical schemes of partition light control, the positions of the lamp strips 23 on the backboard body 21 are different with respect to the same backboard body 21, and the positions of the lamp strips 23 and the lamp strips 23 are also different. Therefore, the limiting piece 22 and the lamp strip 23 are fixed in the application, which can limit the relative positions of the lamp strip 23 and the backboard body 21 or the relative positions of the lamp strip 23 and the lamp strip 23, and meet the needs of different optical schemes of partition light control.

[0027] When the backlight module 20 is suitable for the first sub-area light control optical scheme, the placement position of the limiting piece 22 on the backboard body 21 is the first position, which can limit the arrangement of the lamp strip 23 according to the first sub-area light control optical scheme; when the backlight module 20 is suitable for the second sub-area light control optical scheme, the placement position of the limiting piece 22 on the backboard body 21 is the second position, which can limit the arrangement of the lamp strip 23 according to the second sub-area light control optical scheme. It can be understood that according to different sub-area light control optical schemes, only the arrangement of the limiting piece 22 on the backboard body 21 needs to be changed, and the relative position of the plurality of lamp strips 23 can be limited, that is, the backboard body 21 does not need to be replaced.

[0028] The fixing mode of the limiting piece 22 and the backboard body 21 can adopt a detachable mode such as adhesion, screwing, riveting, etc., so as to facilitate the replacement of the relative position of the limiting piece 22 and the backboard body 21. The material of the limiting piece 22 can be plastic or metal. When the material of the limiting piece 22 is plastic, the limiting piece 22 can be prepared by suction molding or injection molding; when the material of the limiting piece 22 is metal, the limiting piece 22 can be prepared by stamping.

[0029] In this way, one backboard body 21 can be suitable for a plurality of sub-area light control optical schemes, only the limiting piece 22 needs to be replaced, and the backlight module 20 can be re-adapted to different lamp strip 23 distributions under the premise of ensuring that the OD value of the backlight module 20 does not change, so as to meet different sub-area light control optical schemes, that is, the backlight module 20 provided in the application embodiment can be compatible with different sub-area light control optical schemes. The material of the backboard body 21 is a metal material with high strength and fireproof property, that is, the cost is relatively high, and if one backboard body 21 can be suitable for a plurality of sub-area light control optical schemes, the multiplexing rate of the backboard body 21 is improved, and there is no need to modify or re-mold, which greatly saves the cost.

[0030] In order to further improve the stability of the connection between the limiting piece 22 and the backboard body 21 and quickly fix the limiting piece 22 on the backboard body 21, the backboard body 21 is provided with a positioning groove 211, and the limiting piece 22 is arranged in the positioning groove 211 and protrudes from the slot of the positioning groove 211.

[0031] It can be understood that when the limiting piece 22 moves along the plane where the backboard body 21 is located, the groove wall of the positioning groove 211 can abut against the limiting piece 22, which can not only limit the movement or shaking of the limiting piece 22 during the fixing process of the limiting piece 22 and the backboard body 21, but also limit the movement of the lamp strip 23 when the lamp strip 23 abuts against the limiting piece 22, and further limit the limiting piece 22 from falling off from the backboard due to carrying or gravity during the use process of the backlight module 20. Above, the backboard body 21 is provided with the positioning groove 211, which can improve the stability of the fixing of the limiting piece 22 on the backboard body 21.

[0032] In further embodiments, in order to further ensure that the limiting member 22 is fixed in the positioning groove 211, avoiding the limiting member 22 from shaking and affecting the positioning of the light bar 23 on the backboard body 21, the backlight module 20 further comprises a filling member, which is arranged between the positioning groove 211 and the circumferential side of the limiting member 22. The filling member can be elastic and can be foam. By arranging the filling member, when the limiting member 22 is inserted into the positioning groove 211 for fixation, the filling member can press and fix the limiting member 22 from the circumferential side of the limiting member 22, further limiting the movement of the limiting member 22 in the positioning groove 211, and also avoiding the limiting member 22 from colliding with the groove wall of the positioning groove 211 to cause damage.

[0033] It can be understood that the size of the light bar 23 is small, the distance between the light bars 23 is small, but the slot of the positioning groove 211 is relatively wide. If the size of the limiting member 22 only matches the positioning groove 211, it is not suitable for the arrangement of the light bar 23. If the size of the limiting member 22 only meets the structure and distance arrangement of the light bar 23, the size of the positioning groove 211 does not match, or the positioning groove 211 needs to be arranged in a long and narrow shape, but this is not convenient for preparation.

[0034] In order to solve the above technical problems, the limiting member 22 comprises a limiting body 221 and a limiting protrusion 222, the projection of the limiting protrusion 222 on the backboard body 21 is smaller than the projection of the limiting body 221 on the backboard body 21, the limiting body 221 is arranged in the positioning groove 211, the volume of the limiting body 221 corresponds to the size of the positioning groove 211, and the limiting protrusion 222 protrudes from the slot of the positioning groove 211. The size of the limiting protrusion 222 corresponds to the structure of the light bar 23 or the distance between adjacent light bars 23.

[0035] The height of the limiting protrusion 222 protruding from the slot can be less than or equal to the thickness of the light bar 23, thereby avoiding the limiting member 22 from blocking the light of the light bar 23.

[0036] The depth of the positioning groove 211 is greater than or equal to the thickness of the limiting body 221, so that the limiting body 221 does not protrude from the surface of the backboard body 21, only the limiting protrusion 222 protrudes from the surface of the backboard body 21 for fixing the light bar 23, ensuring that the backboard body 21 is overall flat and beautiful, avoiding the limiting member 22 from interfering with the combination and fixation between the light bar 23 and the backboard body 21, and also reducing the overall structure height of the backlight module 20 and having a uniform OD value (distance between the light emitting unit 231 and the diffusion plate).

[0037] In some cases, the limiting protrusion 222 includes a first limiting protrusion connected with the limiting body 221, and the lamp strip 23 is provided with a limiting hole, and the first limiting protrusion is arranged in the limiting hole. Through the cooperation of the first limiting protrusion and the limiting hole, the lamp strip 23 can be quickly positioned on the back plate body 21, and the assembly efficiency is improved.

[0038] In other cases, the limiting protrusion 222 includes a second limiting protrusion connected with the limiting body 221, and the second limiting protrusion is arranged between adjacent lamp strips 23 to fix the distance between the adjacent lamp strips 23.

[0039] In some cases, the number of limiting protrusions 222 is multiple, and the multiple limiting protrusions 222 include a first limiting protrusion connected with the limiting body 221, and the lamp strip 23 is provided with a limiting hole, and the first limiting protrusion is arranged in the limiting hole, and the second limiting protrusion connected with the limiting body 221 is arranged between adjacent lamp strips 23 to fix the distance between the adjacent lamp strips 23.

[0040] It can be understood that by arranging the first limiting protrusion and the first limiting protrusion, the distance between the adjacent lamp strips 23 can be fixed, and the relative position of the lamp strip 23 and the back plate body 21 can be fixed, so that the lamp strip 23 can be quickly positioned on the back plate body 21 in the later period, and the assembly efficiency is improved.

[0041] The limiting part 22 is recessed to form a limiting protrusion 222 away from the back plate body 21, that is, the limiting part 22 has a recess on the side close to the back plate body 21. For example, the limiting part 22 is provided with a first recess 223 on the side close to the back plate body 21, so that the limiting part 22 is formed with a limiting protrusion 222 away from the back plate body 21. The forming method of the limiting protrusion 222 is suitable for plastic suction process or metal stamping process, and the preparation method is relatively simple and efficient. In addition, no additional structure and material are needed, and no additional weight burden is increased.

[0042] The backlight module 20 further includes a colloid (denoted as a first colloid 24), which is arranged between the back plate body 21 and the lamp strip 23, and the first colloid 24 is used to fix the relative position of the back plate body 21 and the lamp strip 23.

[0043] In some cases, the lamp strip 23 also extends towards the limiting body 221 of the limiting part 22, so as to be lapped on the limiting body 221. The backlight module 20 further includes a second colloid 25 arranged between the limiting body 221 and the lamp strip 23, and the second colloid 25 is used to fix the relative position of the limiting part 22 and the lamp strip 23.

[0044] In addition, the backlight module 20 further comprises a third adhesive 26, which is arranged in the positioning groove 211 and between the groove bottom of the positioning groove 211 and the limiting body 221, and is used to fix the limiting piece 22 and the backboard body 21, so as to prevent the limiting piece 22 from being pulled out of the positioning groove 211.

[0045] It can be understood that the side surface of the limiting body 221 close to the groove bottom of the positioning groove 211 has a rough surface, which can increase the contact area of the third adhesive 26 and the limiting body 221, and further increase the fixing firmness of the limiting piece 22 and the backboard body 21 by the third adhesive 26.

[0046] Further, the limiting piece 22 is recessed to form a limiting protrusion 222 in the direction away from the backboard body 21, that is, the limiting piece 22 has a recess on the side close to the backboard body 21. For example, the limiting piece 22 is recessed in the direction away from the backboard body 21 to form the limiting protrusion 222 on the side of the limiting piece 22 away from the backboard body 21, and form the first recess 223 on the side of the limiting piece 22 close to the backboard body 21.

[0047] Since the third adhesive 26 is arranged between the groove bottom of the positioning groove 211 and the limiting body 221, the third adhesive 26 can fill the first recess 223, so as to increase the fixing firmness of the limiting piece 22 and the backboard body 21 by the third adhesive 26.

[0048] The display device can be a television or a display screen or other device with a display function. The display device comprises the backlight module 20 and a display panel, the display panel is arranged opposite to the backlight module 20, and the light generated by the backlight module 20 can illuminate the display panel.

[0049] The backlight module 20 and the display device provided by the embodiment of the present application, the backlight module 20 comprises a backboard body 21, a limiting piece 22 and a plurality of lamp strips 23, the backboard body 21 is provided with a positioning groove 211, the limiting piece 22 comprises a limiting body 221 and a limiting protrusion 222, the limiting body 221 is arranged in the positioning groove 211, and the limiting protrusion 222 protrudes from the groove opening of the positioning groove 211. The limiting piece 22 is connected with the lamp strips 23, which can limit the relative position of the lamp strips 23 and the backboard body 21 or the relative position of the lamp strips 23 and the lamp strips 23, so as to meet the requirements of different optical solutions of the partition light control. If the optical solution of the partition light control is changed, only the shape of the limiting piece 22 needs to be changed, so that the backlight module 20 can adapt to different distributions of the lamp strips 23 to meet the requirements of different optical solutions of the partition light control, that is, the backlight module 20 provided by the embodiment of the present application can be compatible with different optical solutions of the partition light control.

[0050] In the above embodiments, the description of each embodiment is focused on, and the part not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0051] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features.

[0052] The backlight module and the display device provided by the embodiments of the present application are described in detail above. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above embodiment descriptions are only used to help understand the present application. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application, and the above description should not be understood as limiting the present application.

Claims

1. A backlight module, comprising: a backboard body; a limiting member; a light bar, the light bar and the limiting member being disposed on the same side of the backboard body, and the limiting member being fixed with the light bar.

2. The backlight module of claim 1, wherein, The backboard body is provided with a positioning groove, and the limiting member is disposed in the positioning groove and protrudes from a groove opening of the positioning groove.

3. The backlight module of claim 2, wherein, The limiting member comprises a limiting body and a limiting protrusion, a projection of the limiting protrusion on the backboard body is smaller than a projection of the limiting body on the backboard body, and the limiting protrusion protrudes from the groove opening of the positioning groove; the limiting protrusion is fixed with the light bar.

4. The backlight module of claim 3, wherein, A depth of the positioning groove is greater than or equal to a thickness of the limiting body.

5. The backlight module of claim 3, wherein, A side of the limiting member close to the backboard body is provided with a first recess, so that a side of the limiting member away from the backboard body forms the limiting protrusion.

6. The backlight module of claim 3, wherein, The limiting protrusion comprises a first limiting protrusion, the light bar is provided with a limiting hole, and the first limiting protrusion is disposed in the limiting hole.

7. The backlight module of claim 3, wherein, The number of the light bars is multiple, the limiting protrusion comprises a second limiting protrusion, and the second limiting protrusion is disposed between adjacent light bars.

8. The backlight module of claim 3, wherein, The number of the limiting protrusions is multiple, the multiple limiting protrusions comprise the first limiting protrusion and the second limiting protrusion, the light bar is provided with the limiting hole, the first limiting protrusion is disposed in the limiting hole, and the second limiting protrusion is disposed between adjacent light bars.

9. The backlight module of claim 3, wherein, The light bar extends towards the limiting body, and the light bar is overlapped on the limiting body.

10. The backlight module of claim 3, wherein, Further comprising a second adhesive, the second adhesive is disposed between the limiting body and the light bar.

11. The backlight module of claim 3, wherein, Further comprising a third adhesive, the third adhesive is disposed in the positioning groove, and the third adhesive is disposed between a groove bottom of the positioning groove and the limiting body.

12. The backlight module of claim 11, wherein, A side of the limiting body close to the groove bottom of the positioning groove is a rough surface.

13. The backlight module of claim 11, wherein, The limiting member is provided with the first recess on a side of the limiting member close to the backboard body, and the third adhesive is filled in the first recess.

14. The backlight module of claim 2, wherein, Further comprising a filling member, the filling member is disposed between the positioning groove and a peripheral side of the limiting member.

15. The backlight module of claim 14, wherein, The filling member is a foam.

16. The backlight module of claim 2, wherein, The limiting member is provided with the first recess on a side of the limiting member close to the backboard body, so that a side of the limiting member away from the backboard body forms the limiting protrusion, the limiting protrusion protrudes from the groove opening of the positioning groove; the backlight module further comprises a third adhesive, the third adhesive is disposed in the positioning groove, and the third adhesive fills the first recess.

17. The backlight module of claim 1, wherein, Further comprising a first adhesive, the first adhesive is disposed between the backboard body and the light bar.

18. The backlight module of claim 1, wherein, The light bar is a straight light bar or a U-shaped light bar.

19. The backlight module of claim 1, wherein, The limiting member and the backboard body are detachably connected. 20.A display device, comprising: a backlight module, the backlight module comprising: a backboard body, a limiting member, and a light bar, the light bar and the limiting member being disposed on the same side of the backboard body, and the limiting member being fixed with the light bar; a display panel, the display panel being disposed opposite to the backlight module.

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