Backlight module and display device

Abstract

The utility model provides a backlight module and a display device. The backlight module comprises a protective shell, a back plate and a plurality of reinforcing structures. The protective shell is provided with a test surface, and the test surface comprises a test pressure area. The backboard is located on the side, away from the testing face, of the protection shell. The multiple reinforcing structures are located on the side, close to the protective shell, of the back plate, and the reinforcing structures protrude in the direction away from the back plate. The plurality of reinforcing structures comprise at least one first reinforcing part arranged corresponding to the test pressure area, the first reinforcing part has a first height in the thickness direction of the back plate, the first reinforcing part has a first maximum deflection in the deformation process, and the deflection ratio of the first maximum deflection to the first height is 0.8-1. The deflection ratio of the first maximum deflection to the first height is 0.8-1, so that the first reinforcing part can be basically flattened, other reinforcing structures around the test pressure area can be in contact with the protective shell, the pressure is dispersed to the periphery of the test pressure area, and the purpose of dispersing the stress of the back plate is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a backlight module and a display device. BACKGROUND

[0002] In the mechanical test of the whole machine, the pressure of the pressure head is too concentrated, which causes the force received by the back plate and the panel to be too concentrated, thereby causing the back plate to be easily deformed, the panel to generate red and blue spots, bright spots, and broken pieces.

[0003] Therefore, how to disperse the stress of the back plate during testing to reduce the abnormal situation of the panel is a problem to be solved at present. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a backlight module and a display device, which aims to disperse the stress of the back plate during testing to reduce the abnormal situation of the panel.

[0005] The backlight module provided by the embodiments of the present application comprises a protective shell having a test surface, wherein the test surface comprises a test pressure area; a back plate located on the side of the protective shell away from the test surface; and a plurality of reinforcing structures located on the side of the back plate close to the protective shell and protruding away from the back plate; wherein the plurality of reinforcing structures comprises at least one first reinforcing part corresponding to the test pressure area, the first reinforcing part has a first height in the thickness direction of the back plate, the first reinforcing part has a first maximum deflection in the deformation process, and the deflection ratio of the first maximum deflection to the first height is 0.8-1.

[0006] In some embodiments, the first maximum deflection is equal to the first height in the deformation process of the at least one first reinforcing part.

[0007] In some embodiments, the back plate comprises a first pressure range area, the orthographic projection of the test pressure area on the back plate is located in the first pressure range area, and the area of the first pressure range area is greater than the area of the test pressure area; the plurality of reinforcing structures further comprises a second reinforcing part, the second reinforcing part is located in the first pressure range area, and is arranged around the at least one first reinforcing part.

[0008] In some embodiments, the second reinforcing part has a second height in the thickness direction of the back plate, and the second height is greater than or equal to the first height.

[0009] In some embodiments, the second reinforcing part has a second height in the thickness direction of the back plate, the second reinforcing part has a second maximum deflection in the deformation process, and the second height is greater than the second maximum deflection.

[0010] In some embodiments, the backlight module further comprises a light guide plate located on the side of the back plate facing away from the protective shell and comprising a second pressure range area; wherein the orthographic projection of the first pressure range area on the light guide plate is located in the second pressure range area, and the area of the second pressure range area is greater than the area of the first pressure range area.

[0011] In some embodiments, the protective shell comprises a plurality of spaced test pressure areas, one of which has an orthographic projection on the back plate, and one of which has 1-3 first reinforcing portions in the orthographic projection.

[0012] In some embodiments, the cross-sectional area of the reinforcing structure gradually increases in the thickness direction of the back plate away from the protective shell, and the cross-section is parallel to the test surface.

[0013] In some embodiments, the cross-section of the reinforcing structure is circular or regular hexagonal.

[0014] Embodiments of the present application also provide a display device comprising:

[0015] The backlight module in any of the above embodiments; a display panel located on the side of the back plate away from the protective shell, and the edge of the back plate is connected to the display panel.

[0016] In the display panel provided by the embodiments of the present application, a plurality of reinforcing structures are arranged on the side of the back plate close to the protective shell, which can increase the strength of the back plate. When a test pressure is applied to the test pressure area, the reinforcing structure can transmit the pressure downward during deformation, thereby playing a buffering role. Moreover, the first reinforcing portion corresponding to the test pressure area has a first height and a first maximum deflection during deformation, and since the deflection ratio of the first maximum deflection to the first height is 0.8-1, the first reinforcing portion can be basically flattened, so that other reinforcing structures around the test pressure area can contact the protective shell, so that the pressure is dispersed to the surrounding of the test pressure area, the stress range of the back plate is expanded, the purpose of dispersing the stress of the back plate is achieved, and thus the abnormal situation of the panel is reduced, the quality and yield of the product are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The technical solutions and other beneficial effects of the present application will become apparent from the following detailed description of specific embodiments of the present application, combined with the accompanying drawings.

[0018] Figure 1 is a schematic diagram of the cross-sectional structure of the backlight module provided by the embodiments of the present application;

[0019] Figure 2 is a schematic diagram of the cross-sectional structure of the backlight module in the mechanical test process provided by some embodiments of the present application;

[0020] Figure 3 is a perspective view of a backplane and reinforcing structure according to some embodiments of the present application;

[0021] Figure 4 is a perspective view of a backplane and reinforcing structure according to some embodiments of the present application; Figure 3 is a cross-sectional view of a backplane and reinforcing structure according to some embodiments of the present application;

[0022] Figure 5 is a perspective view of a backplane and reinforcing structure according to some embodiments of the present application;

[0023] Figure 6 is a perspective view of a backplane and reinforcing structure according to some embodiments of the present application; Figure 5 is a cross-sectional view of a backplane and reinforcing structure according to some embodiments of the present application;

[0024] Figure 7 is a cross-sectional view of a display device according to some embodiments of the present application. DETAILED DESCRIPTION

[0025] 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, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] In the description of the present application, it should be understood that the terms "first", "second" are used 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 as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0027] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "under" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0028] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0029] In the mechanical test of the whole machine, because the pressure of the pressure head is too concentrated, the force on the back plate is too concentrated, so that the back plate is easily deformed and cannot provide effective support and protection for the display panel.

[0030] Based on this, the embodiment of the present application provides a backlight module, comprising: a protective shell having a test surface, and the test surface comprising a test pressure area; a back plate located on the side of the protective shell away from the test surface; a plurality of reinforcing structures located on the side of the back plate close to the protective shell, and the reinforcing structures protrude away from the back plate; wherein the plurality of reinforcing structures comprise at least one first reinforcing part corresponding to the test pressure area, the first reinforcing part has a first height in the thickness direction of the back plate, the first reinforcing part has a first maximum deflection in the deformation process, and the deflection ratio of the first maximum deflection to the first height is 0.8-1.

[0031] In the display panel provided by the embodiment of the present application, a plurality of reinforcing structures are arranged on the side of the back plate close to the protective shell, which can increase the strength of the back plate. When the test pressure is applied in the test pressure area, the reinforcing structure can transmit the pressure downward in the deformation process, which plays a buffering role. And the first reinforcing part corresponding to the test pressure area has a first height and a first maximum deflection in the deformation process, because the deflection ratio of the first maximum deflection to the first height is 0.8-1, the first reinforcing part can be basically flattened, so that the other reinforcing structures around the test pressure area can contact the protective shell, so that the pressure is dispersed around the test pressure area, the stress range of the back plate is expanded, the purpose of dispersing the stress of the back plate is achieved, and then the abnormal situation of the panel is reduced, the quality and yield of the product are improved.

[0032] The structure of the backlight module provided by the embodiment of the present application is described below in combination with the drawings.

[0033] Please refer to Figure 1 , Figure 1 is a cross-sectional structure schematic diagram of the backlight module provided by the embodiment of the present application.

[0034] The backlight module 100 comprises a protective shell 10, a back plate 20 and a plurality of reinforcing structures 30. The protective shell 10 has a test surface 11, and the test surface 11 comprises a test pressure area 111. The back plate 20 is located on the side of the protective shell 10 away from the test surface 11. The plurality of reinforcing structures 30 are located on the side of the back plate 20 close to the protective shell 10, and the reinforcing structures 30 protrude away from the back plate 20. Among them, the plurality of reinforcing structures 30 comprise at least one first reinforcing part 31 corresponding to the test pressure area 111. The first reinforcing part 31 has a first height h1 in the thickness direction of the back plate 20. The first reinforcing part 31 has a first maximum deflection in the deformation process, and the deflection ratio of the first maximum deflection to the first height h1 is 0.8-1.

[0035] It should be noted that the "maximum deflection" refers to the maximum vertical displacement of the first reinforcing part 31 in the deformation process. In the embodiments of the present application, the "vertical displacement" refers to the displacement in the thickness direction of the back plate 20, and the "maximum vertical displacement" refers to the maximum vertical displacement of a certain point of the first reinforcing part 31 in the deformation process. For example, when the first reinforcing part 31 is in the shape of a dome, the maximum vertical displacement is the vertical displacement of the apex of the dome in the deformation process, because the vertical displacement of the apex is the maximum.

[0036] The "first height h1" refers to the overall height of the first reinforcing part 31 in the thickness direction of the back plate 20, that is, the maximum height of the first reinforcing part 31.

[0037] The test surface 11 of the protective shell 10 is used to receive the pressure of the pressure piece 40, and specifically the test pressure area 111 of the test surface 11 receives the pressure of the pressure piece 40.

[0038] In some embodiments, the pressure piece 40 is a pressure head, and the orthographic projection area of the pressure head on the protective shell 10 is the test pressure area 111. Alternatively, the contact surface of the pressure head and the protective shell 10 forms the test pressure area 111, so the test pressure area 111 is the area where the pressure is most concentrated.

[0039] In some embodiments, the protective shell 10 forms a first accommodating groove 12 on the side away from the test surface 11, and the back plate 20 and the reinforcing structures 30 are located in the first accommodating groove 12.

[0040] The backlight module 100 can further comprise a fixing piece 50 located between the back plate 20 and the protective shell 10. The fixing piece 50 can be located at the edge of the back plate 20 to fix the edge of the back plate 20 and the protective shell 10 together.

[0041] The back plate 20 can be integrally formed with the plurality of reinforcing structures 30, or can be fixedly arranged on the upper surface of the back plate 20.

[0042] At least one first reinforcing portion 31 can be arranged on the back plate 20 corresponding to the test pressure area 111, that is, the reinforcing structure 30 includes at least one first reinforcing portion 31 located directly below the test pressure area 111. Therefore, directly below the test pressure area 111, the deflection ratio of the first maximum deflection of the at least one first reinforcing portion to the first height h1 is 0.8-1.

[0043] When the deflection ratio of the first maximum deflection to the first height h1 is 0.8, it means that in the area where the pressure is most concentrated (directly below the pressure head), the first reinforcing portion 31 can be deformed to 80% of the original height (i.e., the first height h1) during deformation under pressure.

[0044] When the deflection ratio of the first maximum deflection to the first height h1 is 1, it means that in the area where the pressure is most concentrated (directly below the pressure head), the first reinforcing portion 31 can be deformed to 0, i.e., contact with the material of the back plate 20 or be completely flattened, during deformation under pressure. In other words, after deformation, the first maximum deflection of the at least one first reinforcing portion 31 is equal to the first height h1.

[0045] The deflection ratio of the first maximum deflection of the at least one first reinforcing portion 31 to the first height h1 is 0.8-1, which means that the first reinforcing portion 31 can produce a larger deformation during pressure by the pressure head, so that other reinforcing structures 30 around the test pressure area 111 can contact the protective shell 10, thereby dispersing the pressure to the surrounding area of the test pressure area 111 to expand the pressure range.

[0046] For example, under the condition that the size and weight of the pressure head, the material of the back plate 20, and the material, size, and thickness of the first reinforcing portion 31 are fixed, through calculation by the deflection formula, 1-3 first reinforcing portions 31 can be arranged corresponding to the test pressure area 111, so that these first reinforcing portions 31 can be deformed to 80%-100% of their original height.

[0047] In some embodiments, the material of the back plate 20 and the reinforcing structure 30 can be an aluminum alloy, the height of the first reinforcing portion can be 0.1-0.5 mm, for example, 0.3 mm. The thickness of the reinforcing structure can be 0.3 mm.

[0048] The back plate 20 can further include a first pressure range area 21, and a normal projection of the test pressure area 111 on the back plate 20 is located in the first pressure range area 21. It should be noted that the "pressure range area" referred to in the present application can be determined according to the range of pressure generated on the back plate 20 during mechanical testing. The "pressure range area" can be regarded as a virtual area, which is actually formed during mechanical testing; or the "pressure range area" can be understood as a range that needs to be tested for pressure.

[0049] The plurality of reinforcing structures 30 can further include a second reinforcing portion 32, which is located in the first pressure range area 21 and is arranged around the at least one first reinforcing portion 31. It can be understood that when the range of the test pressure area 111 is greater than the range of all the first reinforcing portions 31, part of the second reinforcing portion 32 can be arranged in the range of the test pressure area 111, and the other second reinforcing portion 32 is arranged outside the range of the test pressure area 111. When the range of the test pressure area 111 is fully arranged with the first reinforcing portion 31, the second reinforcing portion 32 is arranged around the test pressure area 111, and at this time, the second reinforcing structure 30 is the other reinforcing structure 30 around the test pressure area 111.

[0050] In some embodiments, the second reinforcing portion 32 has a second height h2 in the thickness direction of the back plate 20, and the second height h2 is greater than or equal to the first height h1.

[0051] When the second height h2 is equal to the first height h1, it is beneficial to simplify the process. When the second height h2 is greater than the first height h1, the first reinforcing portion 31 can contact the protective shell 10 when it is pressed to a smaller degree of deformation (not completely flattened), that is, the second reinforcing structure 30 can more quickly or easily contact the protective shell 10 to provide support, and can more greatly share the pressure of the middle portion.

[0052] In some embodiments, the second reinforcing portion 32 has a second height h2 in the thickness direction of the back plate 20, and the second reinforcing portion 32 has a second maximum deflection during deformation, and the second height h2 is greater than the second maximum deflection. That is, the second reinforcing portion 32 of the surrounding area will not be completely flattened and can still provide a certain degree of support force.

[0053] Please combine Figure 2 , Figure 2 is a cross-sectional structure schematic diagram of the backlight module provided by some embodiments of the present application during mechanical testing. It should be noted that Figure 2Only the reinforcing structure 30 in the first pressure range area 21 generated by the pressure of one pressure piece 40 on the back plate 20 is shown, and other reinforcing structures 30 in the first pressure range area 21 generated by other pressure pieces 40 are not shown.

[0054] The back plate 20 generates a first pressure range when subjected to the pressure of the protective shell 10. Since the pressure is dispersed in the process of transmission, the area of the first pressure range area 21 is larger than the area of the test pressure area 111. The reinforcing structure 30 can play a role of buffering in the process of pressure transmission from the protective shell 10 to the back plate 20, and can play a role of increasing the strength of the back plate 20.

[0055] The backlight module 100 can further comprise a light guide plate 60 located on the side of the back plate 20 away from the protective shell 10, and the light guide plate 60 comprises a second pressure range area 61. The orthographic projection of the first pressure range area 21 on the light guide plate 60 is located in the second pressure range area 61. Since the pressure is dispersed in the process of transmission, the area of the second pressure range area 61 is larger than the area of the first pressure range area 21.

[0056] Compared with the case without the reinforcing structure 30 (including the first reinforcing part 31), the first pressure range area 21 of the back plate 20 in the embodiment of the present application is increased, that is, the area difference between the first pressure range area 21 and the test pressure area 111 is larger, so the area of the second pressure range area 61 is also increased. Similarly, when the pressure is transmitted to the display panel, the pressure range of the display panel is also increased, so the uneven stress of the display panel can be improved, and the quality of the display panel can be improved. The structure of the display panel is described in the display device below.

[0057] Please refer to Figure 3 and Figure 4 , Figure 3 is a schematic diagram of the back plate and the reinforcing structure in some embodiments of the present application, Figure 4 is Figure 3 a schematic diagram of the cross-sectional structure of the back plate and the reinforcing structure.

[0058] It should be noted that since the test pressure area 111 can be many, for example, 80-90 (corresponding to the number of pressure pieces 40), and the test pressure area 111 can also be uniformly distributed on the protective shell 10. Therefore, the reinforcing structure 30 can be provided on the entire surface of the back plate 20 to ensure that all test pressure areas 111 are provided with the reinforcing structure 30, and each test pressure area 111 is provided with at least one first reinforcing part 31.

[0059] Figure 3The back plate 20 is shown on the side near the reinforcing structure 30. Multiple reinforcing structures 30 can be evenly arranged on the back plate 20, and the reinforcing structures 30 protrude toward the protective shell 10.

[0060] like Figure 4 As shown, a cavity can be formed inside the reinforcing structure 30, which is formed by the space between the reinforcing structure 30 and the back plate 20.

[0061] Along the thickness direction of the back plate 20, away from the protective shell 10 (i.e., from top to bottom), the cross-sectional area of ​​the reinforcing structure 30 gradually increases, and the cross-section is parallel to the test surface 11. Compared to a structure with vertical sides, this reinforcing structure 30 with outwardly inclined sides is more conducive to improving support strength and is easier to deform to transmit pressure.

[0062] In some embodiments, the cross-sectional shape of the reinforcing structure 30 is circular. For example... Figure 4 As shown, the reinforcing structure 30 is dome-shaped, so its cross-section is circular. This makes it easier for pressure to be transmitted between the reinforcing structures 30, resulting in better pressure dispersion and further expanding the pressure range.

[0063] Please see Figure 5 and Figure 6 , Figure 5 This is a three-dimensional structural diagram of the back plate and reinforcing structure provided in some embodiments of this application. Figure 6 yes Figure 5 A cross-sectional schematic diagram of the back panel and reinforcing structure.

[0064] like Figure 5 As shown, the reinforcing structure 30 can be in the shape of a regular hexahedron, that is, the cross-section of the reinforcing structure 30 is a regular hexagon. The regular hexahedron can provide higher support strength compared to other unmentioned shapes.

[0065] like Figure 6 As shown, a support structure 70 can also be provided in the cavity between the reinforcing structure 30 and the back plate 20, thereby further improving the strength of the back plate 20.

[0066] This application also provides a display device; please refer to [link / reference]. Figure 7 , Figure 7 This is a cross-sectional structural schematic diagram of a display device provided in some embodiments of this application.

[0067] The display device 200 includes a backlight module 100 and a display panel 101 as described in any of the above embodiments. The display panel 101 is located on the side of the back plate 20 away from the protective shell 10, and the back plate 20 is connected to the edge of the display panel 101.

[0068] In some embodiments, the protective shell 10 forms a first accommodating groove 12 on the side away from the test surface 11, and the back plate 20 and the reinforcing structure 30 are located in the first accommodating groove 12. The back plate 20 forms a second accommodating groove 22 on the side away from the reinforcing structure 30, and the light guide plate 60, other optical film layers, and the display panel 101 can be located in the second accommodating groove 22.

[0069] The display device 200 can further include a first shell 102 connected with the protective shell 10 for sealing the first accommodating groove 12, and a second shell 103 located on the side of the first shell 102 away from the protective shell 10.

[0070] In some embodiments, the display device 200 can be applied to a notebook computer, the protective shell 10 is the uppermost layer of the notebook computer, the first shell 102 is a shell for fixing the keyboard, and the second shell 103 is a shell for fixing other components.

[0071] The display device 200 provided by the embodiments of the present application can also be applied to other types of electronic devices, such as mobile phones, televisions, etc., which are not limited herein.

[0072] The display device provided by the embodiments of the present application has the same technical effects as the backlight module in the above embodiments, which will not be repeated here.

[0073] The above embodiments are only used to help understand the technical solutions of the present application and its core ideas; those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A backlight module, characterized in that, include: A protective shell has a test surface, and the test surface includes a test pressure area; The backplate is located on the side of the protective shell that is away from the test surface; Multiple reinforcing structures are located on the side of the back plate near the protective shell, and the reinforcing structures protrude in a direction away from the back plate; The plurality of reinforcing structures include at least one first reinforcing part disposed corresponding to the test pressure zone. The first reinforcing part has a first height in the thickness direction of the back plate. The first reinforcing part has a first maximum deflection during deformation, and the deflection ratio of the first maximum deflection to the first height is 0.8 to 1.

2. The backlight module of claim 1, wherein, During deformation, at least one of the first reinforcing parts has a first maximum deflection equal to the first height.

3. The backlight module of claim 1, wherein, The backplate includes a first pressure range area, the orthographic projection of the test pressure area on the backplate is located within the first pressure range area, and the area of ​​the first pressure range area is larger than the area of ​​the test pressure area. The plurality of reinforcing structures further include a second reinforcing portion located within the first pressure range region and disposed around the at least one first reinforcing portion.

4. The backlight module of claim 3, wherein, The second reinforcing part has a second height in the thickness direction of the back plate, and the second height is greater than or equal to the first height.

5. The backlight module of claim 3, wherein, The second reinforcing part has a second height in the thickness direction of the back plate, the second reinforcing part has a second maximum deflection during deformation, and the second height is greater than the second maximum deflection.

6. The backlight module of claim 3, wherein, Also includes: A light guide plate is located on the side of the back plate away from the protective shell, and includes a second pressure range area; Wherein, the orthographic projection of the first pressure range region on the light guide plate is located within the second pressure range region, and the area of ​​the second pressure range region is larger than the area of ​​the first pressure range region.

7. The backlight module of claim 1, wherein, The protective shell includes a plurality of spaced-apart test pressure zones, one of which has an orthographic projection on the back plate, and one of the orthographic projections contains 1 to 3 of the first reinforcing parts.

8. The backlight module of claim 1, wherein, Along the thickness direction of the back plate, away from the protective shell, the cross-sectional area of ​​the reinforcing structure gradually increases, and the cross-section is parallel to the test surface.

9. The backlight module of claim 8, wherein, The cross-section of the reinforcing structure is circular or regular hexagonal.

10. A display device, characterized by comprising: include: The backlight module as described in any one of claims 1 to 9; The display panel is located on the side of the back panel away from the protective shell, and the back panel is connected to the edge of the display panel.

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