Backboard, backlight module and display device

Abstract

The embodiment of the utility model provides a back plate, a backlight module and a display device. The back plate comprises a bottom plate and a side plate which are connected, the side plate comprises a first side part and a first supporting part, the two ends of the first side part are connected with the bottom plate and the first supporting part respectively, the first supporting part comprises a concave part and a convex part, and the distance between the bottom surface of the concave part and the bottom plate is smaller than the distance between the top surface of the convex part and the bottom plate. According to the back plate provided by the embodiment of the invention, the concave part and the convex part are arranged in the first supporting part, so that when the edge of the diffusion plate is supported by the bottom surface of the concave part, the light mixing distance between the diffusion plate and the bottom plate is relatively small, and when the edge of the diffusion plate is supported by the top surface of the convex part, the light mixing distance between the diffusion plate and the bottom plate is relatively large; therefore, the diffusion plate can be supported by using different positions of the same back plate to realize adjustment of the light mixing distance of the backlight module, so that the development cost of a mold can be reduced, and the production cost of the back plate is further reduced.

Description

Technical Field

[0001] This application relates to the field of display, and in particular to a backplate, a backlight module, and a display device. Background Technology

[0002] The backlight module is one of the important components of an LCD display. Since liquid crystals themselves do not emit light, the function of the backlight module is to provide sufficient brightness and a uniformly distributed light source so that the LCD display can display images normally. Currently, backlight modules can generally be divided into two types: edge-lit and direct-lit.

[0003] A direct-lit backlight module (D-LED, Direct LED) has a matrix-style light source assembly. Several LEDs provide point light sources from bottom to top when powered. The light is homogenized by a diffuser plate and optical film, and finally provides a uniform surface light source. The uniform surface light source then enters the LCD panel to present the visible picture of the TV.

[0004] The optical distance (OD) of a direct-lit backlight module is the distance between the diffuser plate and the upper surface of the lamp plate. The size of the optical distance directly affects the optical mixing effect of the LED beam, and thus affects the visual effect. Since different display devices have different requirements for the optical distance of the backlight module, different backplates need to be replaced to change the optical distance of the backlight module. This requires the development of multiple backplate molds, resulting in high mold development costs for the backplates, and consequently, high production costs for the backlight module. Utility Model Content

[0005] Based on this, embodiments of this application provide a back panel, a backlight module, and a display device.

[0006] In a first aspect, embodiments of this application provide a back plate, including a connected bottom plate and a side plate. The side plate includes a first side portion and a first support portion. The two ends of the first side portion are respectively connected to the bottom plate and the first support portion. The first support portion includes a recessed portion and a protruding portion. The distance between the bottom surface of the recessed portion and the bottom plate is less than the distance between the top surface of the protruding portion and the bottom plate.

[0007] In some embodiments, the first support portion includes a plurality of recesses and a plurality of protrusions that are alternately arranged, and the plurality of recesses and protrusions are alternately arranged sequentially along the extending direction of the first support portion.

[0008] In some embodiments, the first support portion is disposed on the outer side of the first side portion; and / or,

[0009] The end of the first side portion that is connected to the first support portion is located on the periphery of the end of the first side portion that is connected to the bottom plate.

[0010] In some embodiments, the bottom surface of the recess and the top surface of the protrusion are parallel to each other.

[0011] In some embodiments, the side plate further includes a second side portion and a second support portion connected together, the second support portion being connected to the end of the second side portion away from the first support portion, and the second support portion and the first support portion being disposed on the same side of the second side portion.

[0012] Secondly, embodiments of this application provide a backlight module, including a back plate and a diffuser plate as described above, wherein the edge of the diffuser plate is supported by the bottom surface of the recessed portion, or the edge of the diffuser plate is supported by the top surface of the protrusion.

[0013] In some embodiments, when the edge of the diffuser plate is supported by the bottom surface of the recess, the diffuser plate includes a body and a plurality of engaging portions connected to the edge of the body, the spacing between the plurality of engaging portions forming a plurality of notches, the bottom surface of the recess supporting the engaging portions, and the notches corresponding to the protrusions; and / or,

[0014] The backlight module also includes a light source, which is disposed on the side of the base plate facing the diffuser plate.

[0015] Thirdly, embodiments of this application provide a display device including the backlight module as described above.

[0016] In some embodiments, the display device further includes a mid-frame, the mid-frame including a connected third side portion and a third support portion, the third support portion being supported by the second support portion, and the third side portion being disposed outside the second side portion.

[0017] In some embodiments, the display device further includes a display panel, the edges of which are supported by the third support portion.

[0018] The backplate provided in this application embodiment has a recessed portion and a protruding portion in the first support portion, such that the distance between the bottom surface of the recessed portion and the base plate is smaller than the distance between the top surface of the protruding portion and the base plate. Therefore, when the edge of the diffuser plate is supported by the bottom surface of the recessed portion, the light mixing distance between the diffuser plate and the base plate is small, and when the edge of the diffuser plate is supported by the top surface of the protruding portion, the light mixing distance between the diffuser plate and the base plate is large. That is to say, the light mixing distance of the backlight module can be adjusted by using different positions of the same backplate to support the diffuser plate. Since only one set of molds is needed to manufacture the same backplate, the development cost of the mold can be reduced, thereby reducing the production cost of the backplate and thus reducing the production cost of the backlight module. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0020] Figure 1 This is a cross-sectional structural diagram of a partial area of ​​the backplate provided in an embodiment of this application.

[0021] Figure 2 This is a first-view structural schematic diagram of the backplate provided in an embodiment of this application.

[0022] Figure 3 for Figure 2 A magnified view of region A in the middle.

[0023] Figure 4 This is a structural schematic diagram of the backplate provided in an embodiment of this application from a second perspective.

[0024] Figure 5 for Figure 4 A magnified view of region B in the middle.

[0025] Figure 6 This is a schematic diagram of the structure of the first embodiment of the backlight module provided in this application.

[0026] Figure 7 for Figure 6 A magnified view of region C in the middle.

[0027] Figure 8 This is a schematic diagram of the structure of a first embodiment of the diffuser plate provided in this application.

[0028] Figure 9 for Figure 6 A cross-sectional view of a portion of the backlight module is shown.

[0029] Figure 10 This is a schematic diagram of the structure of a second embodiment of the backlight module provided in this application.

[0030] Figure 11 for Figure 10 A magnified schematic diagram of region D in the middle.

[0031] Figure 12 This is a schematic diagram of the structure of a second embodiment of the diffuser plate provided in this application.

[0032] Figure 13 for Figure 10 A cross-sectional view of a portion of the backlight module shown.

[0033] Figure 14 This is a schematic diagram of the structure of a first embodiment of the display device provided in this application.

[0034] Figure 15 This is a schematic diagram of the structure of a second embodiment of the display device provided in this application.

[0035] Component symbol explanation:

[0036] 100. Back panel; 20. Bottom panel; 30. Side panel; 31. First side; 32. First support; 321. Recess; 322. Protrusion; 33. Second side; 34. Second support; 200. Backlight module; 40. Diffuser plate; 41. Body; 42. Engaging part; 43. Notch; 300. Display device; 50. Middle frame; 51. Third side; 52. Third support; 60. Display panel. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] Please see Figures 1 to 5 This application provides a back plate 100, including a bottom plate 20 and a side plate 30 connected together. The side plate 30 includes a first side portion 31 and a first support portion 32. The two ends of the first side portion 31 are respectively connected to the bottom plate 20 and the first support portion 32. The first support portion 32 includes a recessed portion 321 and a protruding portion 322. The distance between the bottom surface of the recessed portion 321 and the bottom plate 20 is less than the distance between the top surface of the protruding portion 322 and the bottom plate 20.

[0043] The backplate 100 provided in this embodiment of the application provides a recessed portion 321 and a protrusion 322 in the first support portion 32, such that the distance between the bottom surface of the recessed portion 321 and the base plate 20 is smaller than the distance between the top surface of the protrusion 322 and the base plate 20. Therefore, when the edge of the diffuser plate 40 is supported by the bottom surface of the recessed portion 321, the light mixing distance between the diffuser plate 40 and the base plate 20 is smaller, and when the edge of the diffuser plate 40 is supported by the top surface of the protrusion 322, the light mixing distance between the diffuser plate 40 and the base plate 20 is larger. That is to say, the light mixing distance of the backlight module 200 can be adjusted by using different positions of the same backplate 100 to support the diffuser plate 40. Since only one set of molds is needed to manufacture the same backplate 100, the development cost of the mold can be reduced, thereby reducing the production cost of the backplate 100, and thus reducing the production cost of the backlight module 200.

[0044] Figure 2 and Figure 3 The back structure of backplate 100 is shown. Figure 4 and Figure 5 The front structure of the back panel 100 is shown, such as... Figures 2 to 5 As shown, the first support portion 32 includes a plurality of recessed portions 321 and a plurality of protrusions 322 that are alternately arranged, and the plurality of recessed portions 321 and the plurality of protrusions 322 are alternately arranged in sequence along the extending direction of the first support portion 32.

[0045] Please see Figure 1 For example, the first support portion 32 is disposed on the outside of the first side portion 31.

[0046] Please see Figure 1 For example, one end of the first side portion 31 that is connected to the first support portion 32 is located around the end of the first side portion 31 that is connected to the bottom plate 20.

[0047] It is understandable that when the end of the first side portion 31 connected to the first support portion 32 is located outside the end of the first side portion 31 connected to the bottom plate 20, it indicates that the first side portion 31 is inclined at an angle, the angle between the first side portion 31 and the bottom plate 20 is obtuse, and the angle between the first side portion 31 and the first support portion 32 is obtuse.

[0048] Please see Figure 1 In some embodiments, the bottom surface of the recess 321 and the top surface of the protrusion 322 are parallel to each other.

[0049] Please see Figure 1In some embodiments, the bottom surface of the recess 321, the top surface of the protrusion 322, and the side surface of the base plate 20 facing the diffuser plate 40 are parallel to each other.

[0050] Please see Figure 1 In some embodiments, the side plate 30 further includes a second side portion 33 and a second support portion 34 connected together. The second support portion 34 is connected to the end of the second side portion 33 away from the first support portion 32, and the second support portion 34 and the first support portion 32 are disposed on the same side of the second side portion 33.

[0051] It should be noted that the second support part 34 is used to support the middle frame 50.

[0052] Please see Figures 6 to 13 This application provides a backlight module 200, including a back plate 100 and a diffuser plate 40 as described in any of the above embodiments. The edge of the diffuser plate 40 is supported by the bottom surface of the recessed portion 321, or the edge of the diffuser plate 40 is supported by the top surface of the protrusion 322.

[0053] Please see Figure 6 and Figure 9 The edge of the diffuser plate 40 can be supported by the bottom surface of the recess 321. At this time, the light mixing distance H1 between the diffuser plate 40 and the base plate 20 is small.

[0054] Please see Figure 7 and Figure 8 When the edge of the diffuser plate 40 is supported by the bottom surface of the recess 321, the diffuser plate 40 includes a body 41 and a plurality of engaging portions 42 connected to the edge of the body 41. The space between the plurality of engaging portions 42 forms a plurality of notches 43. The bottom surface of the recess 321 supports the engaging portions 42. The notches 43 are provided corresponding to the protrusions 322.

[0055] Please see Figure 10 and Figure 13 The edge of the diffuser plate 40 can be supported by the top surface of the protrusion 322. At this time, the light mixing distance H2 between the diffuser plate 40 and the base plate 20 is relatively large.

[0056] Please see Figure 11 and Figure 12 When the edge of the diffuser plate 40 is supported by the top surface of the protrusion 322, the diffuser plate 40 can have a neat edge.

[0057] Please see Figure 9 and Figure 13The base plate 20 and the diffuser plate 40 are disposed opposite to each other, and for example, the base plate 20 and the diffuser plate 40 are parallel to each other.

[0058] For example, the backlight module 200 further includes a light source (not shown) disposed on the base plate 20 on the side facing the diffuser plate 40.

[0059] Please see Figure 14 and Figure 15 This application provides a display device 300, which includes the backlight module 200 in any of the above embodiments.

[0060] Please see Figure 14 and Figure 15 The display device 300 further includes a middle frame 50, which includes a third side portion 51 and a third support portion 52 connected together. The third support portion 52 is supported by the second support portion 34, and the third side portion 51 is disposed on the outside of the second side portion 33.

[0061] It should be noted that the third support portion 52 of the middle frame 50 is used to support the display panel 60.

[0062] Please see Figure 14 and Figure 15 A first adhesive layer may be provided between the third support portion 52 and the second support portion 34. For example, the first adhesive layer is foam double-sided tape.

[0063] Please see Figure 14 and Figure 15 The display device 300 further includes a display panel 60, the edge of which is supported by the third support portion 52.

[0064] Please see Figure 14 and Figure 15 A second adhesive layer may be provided between the third support portion 52 and the display panel 60. For example, the second adhesive layer is foam double-sided tape.

[0065] For example, the display panel 60 is a liquid crystal display panel.

[0066] For example, the display device 300 can be a terminal such as a television, computer monitor, mobile phone, or tablet computer, or it can be a device with a display screen such as a game device, augmented reality (AR) device, virtual reality (VR) device, data storage device, audio playback device, video playback device, or wearable device. Wearable devices can be smart bracelets, smart glasses, smartwatches, smart decorations, etc.

[0067] The backplane, backlight module, and display device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application, and the descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A backplate, characterized in that, It includes a connected base plate and a side plate. The side plate includes a first side portion and a first support portion. The two ends of the first side portion are respectively connected to the base plate and the first support portion. The first support portion includes a recessed portion and a protruding portion. The distance between the bottom surface of the recessed portion and the base plate is less than the distance between the top surface of the protruding portion and the base plate.

2. The backplate according to claim 1, characterized in that, The first support portion includes a plurality of recessed portions and a plurality of protrusions that are alternately arranged, and the plurality of recessed portions and the plurality of protrusions are alternately arranged in sequence along the extending direction of the first support portion.

3. The backplate according to claim 1, characterized in that, The first support portion is disposed on the outer side of the first side portion; and / or, The end of the first side portion that is connected to the first support portion is located on the periphery of the end of the first side portion that is connected to the bottom plate.

4. The backplate according to claim 1, characterized in that, The bottom surface of the recess and the top surface of the protrusion are parallel to each other.

5. The backplate according to any one of claims 1-4, characterized in that, The side plate also includes a second side portion and a second support portion connected together. The second support portion is connected to the end of the second side portion away from the first support portion, and the second support portion and the first support portion are disposed on the same side of the second side portion.

6. A backlight module, characterized in that, Includes the back plate and diffuser plate as described in claim 1, wherein the edge of the diffuser plate is supported by the bottom surface of the recess, or the edge of the diffuser plate is supported by the top surface of the protrusion.

7. The backlight module according to claim 6, characterized in that, When the edge of the diffuser plate is supported by the bottom surface of the recess, the diffuser plate includes a body and a plurality of engaging portions connected to the edge of the body. The spacer regions between the engaging portions form a plurality of notches. The bottom surface of the recess supports the engaging portions, and the notches correspond to the protrusions; and / or, The backlight module also includes a light source, which is disposed on the side of the base plate facing the diffuser plate.

8. A display device, characterized in that, Includes the backlight module as described in any one of claims 6-7.

9. The display device according to claim 8, characterized in that, The side plate also includes a second side portion and a second support portion connected together. The second support portion is connected to the end of the second side portion away from the first support portion, and the second support portion and the first support portion are disposed on the same side of the second side portion. The display device further includes a middle frame, which includes a third side portion and a third support portion connected together. The third support portion is supported by the second support portion, and the third side portion is disposed on the outside of the second side portion.

10. The display device according to claim 9, characterized in that, The display device further includes a display panel, the edge of which is supported by the third support portion.

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