Backlight module, display module and display device

Abstract

The disclosed embodiment provides a backlight module, a display module and a display device, the backlight module comprising: a glass back plate, the glass back plate having a first surface and a second surface arranged opposite to each other; a plastic frame surrounding the glass back plate, the plastic frame having a first pasting surface and a second pasting surface parallel to each other, the first pasting surface and the second pasting surface both facing the glass back plate, the first pasting surface and the second pasting surface forming a stepped structure, the edge of the first surface of the glass back plate being pasted to the first pasting surface; a light-emitting board, the light-emitting board being located on one side of the first surface of the glass back plate, and the edge of the light-emitting surface of the light-emitting board being pasted to the second pasting surface. It is used to ensure that the light-emitting board is firmly pasted while reducing the overall thickness and cost of the backlight module.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of display, and more particularly to a backlight module, a display module and a display device. Background Art

[0002] Passive display devices, such as liquid crystal display devices, require a backlight module to provide backlight for them; the backlight module includes a plurality of micro inorganic light emitting diodes with a size of hundreds of microns or less. Summary of the invention

[0003] The embodiments of the present disclosure provide a backlight module, a display module and a display device, which are used to ensure that the light-emitting panel is firmly adhered while reducing the overall thickness and cost of the backlight module.

[0004] In a first aspect, an embodiment of the present disclosure provides a backlight module, comprising:

[0005] A glass back plate, the glass back plate having a first surface and a second surface arranged opposite to each other;

[0006] A plastic frame surrounding the glass back plate, the plastic frame having a first pasting surface and a second pasting surface parallel to each other, the first pasting surface and the second pasting surface both facing the glass back plate, the first pasting surface and the second pasting surface forming a stepped structure, and an edge of the first surface of the glass back plate being pasted to the first pasting surface;

[0007] A light-emitting board is located on one side of the first surface of the glass back plate, and an edge of a light-emitting surface of the light-emitting board is adhered to the second adhesive surface.

[0008] A glue frame is arranged around the glass back plate. The glass back plate has a first surface and a second surface that are arranged opposite to each other. The glue frame has a first adhesive surface and a second adhesive surface that are parallel to each other. The first adhesive surface and the second adhesive surface both face the glass back plate. The first adhesive surface is adhered to the edge of the first surface of the glass back plate, and the second adhesive surface is adhered to the edge of the light-emitting surface of the light-emitting board, so that the second adhesive surface of the glue frame is adhered to the edge of the light-emitting board, reducing the adhesive area of ​​the second adhesive surface and the light-emitting board, thereby reducing bubbles. The fixing of the glass back plate to the glue frame and the light-emitting board to the glue frame is achieved only by adhesively bonding on the first adhesive surface and the second adhesive surface of the glue frame. On the one hand, the structure of the backlight module provided by the embodiment of the present disclosure is simplified. On the other hand, the area of ​​the first adhesive surface 2a and the second adhesive surface 2b is reduced, so that the amount of adhesive used for bonding is reduced, thereby reducing the cost of connecting the glue frame to the glass back plate and the cost of connecting the glue frame to the light-emitting board. The edge of one side of the light-emitting surface of the light-emitting board is adhered to the second adhesive surface, so that the adhesive area between the light-emitting board and the second adhesive surface is reduced, which effectively reduces the bubbles generated when the light-emitting board and the second adhesive surface are adhered, and can ensure that the thickness of the light-emitting board is more stable when it is adhered to the adhesive frame; in addition, the glass back panel and the light-emitting board are both connected to the adhesive frame, so that in the direction perpendicular to the glass back panel, the light-emitting board and the glass back panel will not exceed the thickness of the adhesive frame, that is, the thickness of the adhesive frame is equivalent to the thickness of the backlight module provided in the embodiment of the present disclosure, and will not increase the thickness of the glass back panel, thereby effectively compressing the thickness of the backlight module provided in the embodiment of the present disclosure.

[0009] Optionally, the area shape of the orthographic projection of the first adhesive surface on the glass back plate is annular.

[0010] Optionally, the area shape of the orthographic projection of the second adhesive surface on the glass back plate is annular.

[0011] Optionally, from the edge of the glass back plate to the center direction, the width of the first adhesive surface is greater than the width of the second adhesive surface.

[0012] Optionally, an orthographic projection of the first adhesive surface on the glass back panel has no overlap with an orthographic projection of the second adhesive surface on the glass back panel.

[0013] Optionally, the first adhesive surface is adhered to the first surface of the glass back plate via a first adhesive layer; and the second adhesive surface is adhered to the light-emitting panel via a second adhesive layer.

[0014] Optionally, the first adhesive layer and the second adhesive layer are made of the same material.

[0015] Optionally, the orthographic projection of the light-emitting panel on the glass back panel is located within the first surface range of the glass back panel.

[0016] Optionally, the glass back panel is made of glass.

[0017] Optionally, the plastic frame is an integrated structure.

[0018] Optionally, a diffusion plate is further included, and a third adhesive surface for supporting the diffusion plate is formed on a side of the plastic frame away from the glass back plate, and an edge of the diffusion plate is adhered to the third adhesive surface.

[0019] Optionally, the orthographic projection of the third adhesive surface on the glass back plate is located within the orthographic projection of the second adhesive surface on the glass back plate.

[0020] Optionally, it further comprises a film material structure layer, wherein the film material structure layer is located on a side of the diffuser plate away from the glass back plate;

[0021] The orthographic projection of the film material structure layer on the glass back plate covers the orthographic projection of the diffusion plate on the glass back plate.

[0022] In a second aspect, the present disclosure provides a display module, comprising a liquid crystal display screen and the backlight module according to any one of the first aspects, wherein the backlight module comprises: a film material structure layer and a diffusion plate;

[0023] The liquid crystal display screen is located on a side of the film material structure layer away from the diffusion plate;

[0024] The edge of the liquid crystal display screen is bonded to the glue frame.

[0025] Optionally, in a direction perpendicular to the liquid crystal display screen, the sum of the thicknesses of the liquid crystal display screen, the film material structure layer, the diffusion plate, the light-emitting plate and the glass back plate is less than or equal to the thickness of the rubber frame.

[0026] In a third aspect, the present disclosure provides a display device, including a metal shielding cover and the display module of the second aspect;

[0027] The metal shielding cover is arranged on the second surface of the glass back plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a partial cross-sectional view of a backlight module in the prior art;

[0030] Figure 2A partial cross-sectional view of a backlight module provided by an embodiment of the present disclosure;

[0031] Figure 3 A schematic diagram of the structure of a plastic frame provided in an embodiment of the present disclosure;

[0032] Figure 4 A top view of the pasting position of a glue frame and a light-emitting panel provided in an embodiment of the present disclosure;

[0033] Figure 5 A partial cross-sectional view of a display module provided by an embodiment of the present disclosure;

[0034] Figure 6 An exploded diagram of a display device provided by an embodiment of the present disclosure;

[0035] Figure 7 For the corresponding Figure 6 A local enlarged schematic diagram of point A in FIG.

[0036] Figure 8 A front view of a display device provided by an embodiment of the present disclosure;

[0037] Fig. 9 A side view of a display device provided by an embodiment of the present disclosure;

[0038] Fig.10 A three-dimensional diagram of a display device provided in an embodiment of the present disclosure.

[0039] Icon: 1'-metal glass back panel; 21'-inner plastic frame; 22'-outer plastic frame; 3'-light-emitting board; 31'-light-emitting unit; 4'-easy-pull adhesive; 6'-diffuser plate; 7'-membrane material structure layer; 81'-foam tape;

[0040] M-display module; 1-glass back panel; 1a-first surface; 1b-second surface; 2-glue frame; 2a-first adhesive surface; 2b-second adhesive surface; 2c-third adhesive surface; 2d-fourth adhesive surface; 2e-connecting surface; 21-fixing part; 22-adhesive part; 23-edge part; 3-light-emitting board; 31-light-emitting unit; 4-first adhesive layer; 5-second adhesive layer; 6-diffuser plate; 7-membrane material structure layer; 8-liquid crystal display screen; 81-foam tape; 82-liquid crystal layer; 83-upper polarizer; 84-lower polarizer; 9-metal shielding cover; 10-decorative strip; 11-fixing tape; 12-back shell; 13-screws; 14-base. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0042] like Figure 1 The conventional backlight module is mainly assembled by a metal glass back panel 1' and an inner glue frame 21'. An outer glue frame 22' is arranged on the periphery of the metal glass back panel 1'. A foam tape 81' is arranged on the upper surface of the outer glue frame 22'. The foam tape 81' is used to stick the liquid crystal display screen (not shown in the figure) to the outer glue frame 22'. The metal glass back panel 1' and the light-emitting panel 3' are fixed in a manner combining sticking and connecting parts. A plurality of light-emitting units 31' are arranged on the light-emitting surface of the light-emitting panel 3'. The sticking manner of the metal glass back panel 1' and the light-emitting panel 3' is to stick a large area of ​​easy-pull adhesive 4' on the side of the metal glass back panel 1' facing the light-emitting panel 3', so that the glass back panel 1' and the light-emitting panel 3' are relatively fixed; the connecting means of the metal glass back panel 1' and the light-emitting panel 3' is to use screws and buckles (not shown in the figure) on other parts where the easy-pull adhesive is not stuck, so that the glass back panel 1' and the light-emitting panel 3' are relatively fixed. Furthermore, the film material structure layer 7' and the diffusion plate 6' are arranged on the light emitting side of the light emitting plate 3'.

[0043] The mold cost for making the metal glass back plate 1', the mold cost for making the inner plastic frame 2', the material cost of the metal glass back plate 1' and the inner plastic frame 21', the material cost of screws or buckles, and the extra manual assembly time will greatly affect the cost of the backlight module.

[0044] The traditional fixing method of the metal glass back panel 1' and the light-emitting panel 3' is pasting. Pasting requires attaching a large area of ​​easy-to-pull adhesive 4' to the metal glass back panel 1', and pasting the light-emitting panel 3' to the metal glass back panel 1'. The attachment area of ​​the easy-to-pull adhesive 4' is required to account for more than 70% of the area of ​​the light-emitting panel 3'. Due to the attachment precision, bubbles exist in some areas between the easy-to-pull adhesive and the metal glass back panel, resulting in unstable overall thickness.

[0045] To solve the above problems, Figure 2 As shown, combined Figure 3 , a backlight module provided by an embodiment of the present disclosure includes:

[0046] A glass back plate 1, wherein the glass back plate 1 has a first surface 1a and a second surface 1b which are arranged opposite to each other;

[0047] A plastic frame 2 surrounding the glass back plate 1, the plastic frame 2 having a first pasting surface 2a and a second pasting surface 2b parallel to each other, the first pasting surface 2a and the second pasting surface 2b are not coplanar, that is, the first pasting surface 2a and the second pasting surface 2b are skew surfaces, the first pasting surface 2a and the second pasting surface 2b both face the glass back plate 1, the first pasting surface 2a and the second pasting surface 2b form a stepped structure, and the edge of the first surface 1a of the glass back plate 1 is pasted to the first pasting surface 2a;

[0048] The light-emitting board 3 is located on one side of the first surface 1 a of the glass back plate 1 , and the edge of the light-emitting surface of the light-emitting board 3 is adhered to the second adhesive surface 2 b .

[0049] It should be noted that a glue frame 2 is arranged around the glass back panel 1, and the glass back panel 1 has a first surface 1a and a second surface 1b arranged opposite to each other. The glue frame 2 has a first pasting surface 2a and a second pasting surface 2b which are parallel to each other. The first pasting surface 2a and the second pasting surface 2b are both facing the glass back panel 1, and the first pasting surface 2a is pasted to the edge of the first surface 1a of the glass back panel 1, and the second pasting surface 2b is pasted to the edge of the light emitting surface of the light-emitting board 3, so that the second pasting surface 2b of the glue frame 2 is pasted to the edge of the light-emitting board 3, and the area of ​​the second pasting surface 2b accounts for 2% of the area of ​​the light-emitting board 3. Compared with the existing easy-pull adhesive 4' whose pasting area accounts for more than 70% of the area of ​​the light-emitting board 3', the pasting area of ​​the second pasting surface 2b and the light-emitting board 3 is reduced, thereby reducing bubbles. The glass back panel 1 and the glue frame 2, and the light-emitting panel 3 and the glue frame 2 are fixed only by pasting on the first pasting surface 2a and the second pasting surface 2b of the glue frame 2. The fixing of the glue frame 2 and the glass back panel 1, on the one hand, simplifies the structure of the backlight module provided by the embodiment of the present disclosure, and on the other hand, reduces the area of ​​the first pasting surface 2a and the second pasting surface 2b, so that the amount of adhesive used for pasting is reduced, thereby reducing the cost of connecting the glue frame 2 and the glass back panel 1, and the cost of connecting the glue frame 2 and the light-emitting panel 3. The edge of one side of the light-emitting surface of the light-emitting panel 3 is adhered to the second adhesive surface 2b, so that the adhesive area between the light-emitting panel 3 and the second adhesive surface 2b is reduced, and the bubbles generated when the light-emitting panel 3 and the second adhesive surface 2b are adhered are effectively reduced, so as to ensure that the thickness of the light-emitting panel 3 is more stable when it is adhered to the adhesive frame 2; in addition, the glass back panel 1 and the light-emitting panel 3 are both connected to the adhesive frame 2, so that in the direction perpendicular to the glass back panel 1, the light-emitting panel 3 and the glass back panel 1 will not exceed the thickness of the adhesive frame 2, that is, the thickness of the adhesive frame 2 is equivalent to the thickness of the backlight module provided in the embodiment of the present disclosure, and will not increase the thickness of the glass back panel 1, thereby effectively compressing the thickness of the backlight module provided in the embodiment of the present disclosure.

[0050] For the convenience of explanation, the light emitting surface of the light emitting board 3 is taken as the top, and the backlight surface of the light emitting board 3 is taken as the bottom, then the first pasting surface 2a is at the bottom, and the second pasting surface 2b is at the top relative to the first pasting surface 2a. A plurality of light emitting units 31 are arranged on one side of the light emitting board 3, and the light emitting units 31 can be one or more to form a group, and the brightness of each group can be controlled separately.

[0051] The light-emitting unit 31 may include a light-emitting element and a protective structure. For example, the light-emitting element is a micro inorganic light-emitting diode of hundreds of micrometers or less; the protective structure may be made of transparent silicone and may have the ability to adjust the light type of the light-emitting element, for example, the surface of the protective structure away from the light-emitting board may be a curved surface.

[0052] exist Figure 2 and Figure 3 In the embodiment, the edge of the first surface 1a of the glass back panel 1 is fixed to the first adhesive surface 2a of the glue frame 2 by the first adhesive layer 4, and in order to ensure the firmness of the adhesion, the first adhesive surface 2a is surrounded, that is, the area of ​​the positive projection of the first adhesive surface 2a on the glass back panel 1 is in the shape of a ring; the second surface 1b of the glass back panel 1 is basically flush with the bottom of the glue frame 2, that is, the second surface 1b of the glass back panel 1 will not exceed the size range of the glue frame 2, that is, the upper and lower thicknesses of the glue frame 2 are the maximum thickness of the backlight module disclosed in the present invention, thereby effectively reducing the thickness of the backlight module provided by the embodiment of the present invention.

[0053] The edge of the light-emitting board 3 is fixed to the second adhesive surface 2b of the glue frame 2 through the second adhesive layer 5, and in order to ensure the firmness of the adhesive, the second adhesive surface 2b is set to be surrounded, that is, the area of ​​the orthographic projection of the second adhesive surface 2b on the glass back plate 1 is in the shape of a ring. Of course, the light-emitting units 31 of the light-emitting board 3 are located inside the ring area formed by the second adhesive surface 2b, that is, all the light-emitting units 31 on the light-emitting board 3 will not be blocked by the glue frame 2; the light-emitting board 3 is connected to the glue frame 2 to achieve fixation, rather than connecting the light-emitting board 3 and the glass back plate 1. Since the light-emitting board 3 is only fixed to the second adhesive surface 2b of the glue frame 2 at the edge, the area of ​​the second adhesive layer 5 is greatly reduced compared to the large-area easy-to-pull adhesive in the prior art, thereby reducing the cost of adhesive.

[0054] Since the overall structure of the glass back plate 1 is larger than that of the light-emitting board 3, in order to ensure the stability of the connection between the glass back plate 1 and the plastic frame 2, the width of the first adhesive surface 2a is greater than the width of the second adhesive surface 2b from the edge of the glass back plate 1 to the center. Of course, according to actual needs, in the direction perpendicular to the plane where the glass back plate 1 is located, that is, in the up and down direction, the thickness of the first adhesive surface 2a and the thickness of the second adhesive surface 2b can also be adjusted according to actual needs of adhesive bonding.

[0055] In some specific embodiments, the first adhesive surface 2a is adhered to the first surface 1a of the glass back plate 1 through the first adhesive layer 4; the second adhesive surface 2b is adhered to the light-emitting panel 3 through the second adhesive layer 5. For example, the first adhesive layer 4 and the second adhesive layer 5 are made of the same material, and the material of the first adhesive layer 4 is a strong double-sided adhesive, and the material of the second adhesive layer 5 is also a strong double-sided adhesive. For example, the materials of the first adhesive layer 4 and the second adhesive layer 5 can also be different materials.

[0056] Continue to refer Figure 2 and Figure 3 The orthographic projection of the first pasting surface 2a on the glass back plate 1 does not overlap with the orthographic projection of the second pasting surface 2b on the glass back plate 1. The first pasting surface 2a and the second pasting surface 2b are arranged alternately up and down, that is, in the direction perpendicular to the glass back plate, there is a height difference of a step-like structure between the first pasting surface 2a and the second pasting surface 2b, which facilitates fixing the light-emitting panel 3 on the second pasting surface 2b.

[0057] In some specific embodiments, the orthographic projection of the light-emitting board 3 on the glass back plate 1 is located within the first surface 1a of the glass back plate 1. It can be seen that the area of ​​the light-emitting board 3 is smaller than that of the glass back plate 1, so the adhesion of the second adhesive layer 5 for attaching the light-emitting board 3 is less than the adhesion of the first adhesive layer 4 for attaching the glass back plate 1.

[0058] In order to reduce the cost of the backlight module provided in the embodiment of the present disclosure, the material of the glass back plate 1 is glass.

[0059] like Figure 3 As shown, the plastic frame 2 is an integrated structure; the plastic frame 2 is divided into a fixing portion 21, an adhesive portion 22 and an edge portion 23. The mold for making the plastic frame 2 is improved according to the needs of the adhesive surface, so that the plastic frame 2 in the backlight module provided by the embodiment of the present disclosure is integrally formed, the overall strength of the plastic frame 2 is improved, and the glass back plate 1 is fixed on the first adhesive surface 2a of the integrated plastic frame 2, and the light-emitting board 3 is fixed on the second adhesive surface 2b of the integrated plastic frame 2. The first adhesive surface 2a, the second adhesive surface 2b, the third adhesive surface 2c and the fourth adhesive surface 2d are formed by utilizing the stepped structure of the integrated plastic frame 2 itself.

[0060] Specifically, a diffusion plate 6 is pasted on the third pasting surface 2c, and a third pasting surface 2c for supporting the diffusion plate 6 is formed on the side of the plastic frame 2 facing away from the glass back plate 1, and the edge of the diffusion plate 6 is pasted to the third pasting surface 2c. The diffusion plate 6 is used to diverge the light of the light-emitting plate 3, so that the light emitted by the light-emitting plate 3 is more uniform, so as to improve the display effect of the display module M provided by the embodiment of the present disclosure. Figure 3 ,exist Figure 3The connecting surface 2e between the third adhesive surface 2c and the second adhesive surface 2b is an inclined surface, which can improve the light effect of the light emitted by the light-emitting board 3 at the inner edge of the glue frame; the inclination angle of the connecting surface 2e makes the orthographic projection of the third adhesive surface 2c on the glass back plate 1 located within the orthographic projection of the second adhesive surface 2b on the glass back plate 1.

[0061] like Figure 2 and Figure 3 As shown, Figure 2 There is a light mixing distance (OD) between the diffusion plate 6 and the light emitting plate 3, and the light mixing distance is realized by the edge portion 23 of the plastic frame 2. The edge portion 23 includes a second pasting surface 2b and a third pasting surface 2c that are parallel to each other, and a connecting surface 2e connecting the second pasting surface 2b and the third pasting surface 2c; specifically, the distance h between the second pasting surface 2b and the third pasting surface 2c is determined according to the OD corresponding to the application scenario of the backlight module. In some embodiments, the OD is 0.5 mm.

[0062] The area where the second adhesive surface 2b overlaps with the light-emitting board 3 is located at the edge of the light-emitting board 3. If the surface of the light-emitting board 3 facing away from the glass back plate 1 is rectangular, the area where the second adhesive surface 2b overlaps with the light-emitting board 3 is a rectangular frame. Figure 4 As shown, L1=L2=L3, 1mm≤L1≤2mm, L4 is greater than L1, 4mm≤L4≤6mm, the size of the overlapping area between the third adhesive surface 2c and the diffuser 6 is L5, 1mm≤L5≤2mm, that is, the lengths of L1 and L5 can be the same, or L1 can be greater than L5, or L1 can be less than L5, as long as the connecting surface 2e can always be guaranteed to be an inclined surface, and the angle between the connecting surface 2e and the second adhesive surface 2b is less than 90°.

[0063] In some specific implementations, the embodiments of the present disclosure further include a film structure layer 7, which is located on the side of the diffuser 6 away from the glass back plate 1; the orthographic projection of the film structure layer 7 on the glass back plate 1 covers the orthographic projection of the diffuser 6 on the glass back plate 1. The base material of the diffuser 6 can be glass to reduce the thickness and achieve an ultra-thin effect.

[0064] like Figure 5 In the second aspect, a display module M provided by an embodiment of the present disclosure includes a liquid crystal display screen 8 and a backlight module according to any one of the first aspects, wherein the backlight module includes: a film material structure layer 7 and a diffusion plate 6;

[0065] The liquid crystal display screen 8 is located on the side of the film structure layer 7 away from the diffusion plate 6;

[0066] The edge of the LCD screen 8 is bonded to the plastic frame 2 , and the edge of the LCD screen 8 is fixed to the fourth adhesive surface 2 d of the plastic frame 2 . Specifically, the fourth adhesive surface 2 d and the edge of the LCD screen 8 are bonded by a foam tape 81 .

[0067] Specifically, the liquid crystal display screen 8 includes an upper polarizer 83, a lower polarizer 84 and a liquid crystal layer 82 located between the upper and lower polarizers; the lower polarizer 84 is used to convert the light beam generated by the light-emitting panel 3 into polarized light, and the upper polarizer 83 is used to analyze the polarized light after electrical modulation by the liquid crystal layer 82 to produce light and dark contrast, thereby producing a display image.

[0068] Continue to refer Figure 5 The distance d between the side of the light-emitting panel 3 and the plastic frame 2 is 0.3mm≤d≤0.6mm. In order to ensure no interference in assembly and the expansion of the glass back panel 1, the size of d cannot be less than 0.3mm.

[0069] In the direction perpendicular to the liquid crystal display screen 8, the sum of the thicknesses of the liquid crystal display screen 8, the film material structure layer 7, the diffusion plate 6, the light-emitting plate 3 and the glass back plate 1 is less than or equal to the thickness of the plastic frame 2. That is, in the direction perpendicular to the liquid crystal display screen 8, the overall thickness of the plastic frame 2 is the thickness of the display module M provided by the embodiment of the present disclosure, thereby effectively compressing the thickness of the entire display module M. Figure 4 As can be seen from the figure, the display surface of the liquid crystal display screen 8 does not exceed the uppermost surface of the plastic frame 2 .

[0070] like Figure 6-Figure 10 As shown, in the third aspect, an embodiment of the present disclosure provides a display device. The size range of the display device is 18.5 inches to 49 inches. For example, the size of the display device is 34 inches. 34 inches means that the diagonal length is 34 inches, 1 inch = 2.54 cm, the diagonal length is 34x2.54 = 86.36 cm, and the length-to-width ratio is 4:3. After calculation, the length is about 68 cm and the width is about 51 cm. For ease of understanding, Figure 6 An exploded view of the display device is shown in the figure, in which a metal shielding cover 9 is provided on the second surface 1b of the glass back plate 1 in the display module M, and the back of the metal shielding cover 9 is in contact with the fixing tape 11 attached to the glass back plate 1, that is, the side of the metal shielding cover 9 facing the glass back plate 1 is in contact with the fixing tape 11 attached to the glass back plate 1; the rear shell 12 is locked with the metal shielding cover 9 from the back by means of screws 13, and the bottom of the rear shell 12 is locked and fixed with the rubber frame 2. The decorative strip 10 is located on the display surface side of the liquid crystal display screen 8 of the display module M, and is located at the lower edge of the display surface. The base 14 is connected to the rear shell 12 in a detachable manner, for example, it can be connected by plugging or by screws 13.

[0071] In order to describe the structure of each adhesive surface in detail, Figure 5 Zoom in on point A in the figure, and the enlarged view is Figure 7 ,exist Figure 7 In the embodiment, the first adhesive layer 4 can be a ring structure with multiple sections around, and of course the first adhesive layer 4 can also be a ring structure with a whole circle around. The second adhesive layer 5 can be a ring structure with multiple sections around, and of course the second adhesive layer 5 can also be a ring structure with a whole circle around.

[0072] In some embodiments, the display device provided in the embodiments of the present disclosure may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame, a navigator, a smart watch, a fitness wristband, a personal digital assistant, etc. In addition, it can be understood by those skilled in the art that the above structure does not constitute a limitation on the display device provided in the embodiments of the present disclosure. In other words, the display device provided in the embodiments of the present disclosure may include more or fewer of the above components, or combine certain components, or arrange the components differently.

[0073] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of this application and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims

1. A backlight module, characterized in that: include: A glass back plate, the glass back plate having a first surface and a second surface arranged opposite to each other; A glue frame surrounding the glass back plate, the glue frame having a first pasting surface and a second pasting surface parallel to each other, the first pasting surface and the second pasting surface both facing the glass back plate, the orthographic projection of the first pasting surface on the glass back plate and the orthographic projection of the second pasting surface on the glass back plate having no overlap, and in a direction perpendicular to the glass back plate, there is a height difference between the first pasting surface and the second pasting surface, so that the first pasting surface and the second pasting surface form a stepped structure, and the edge of the first surface of the glass back plate is pasted to the first pasting surface; A light-emitting board is located on one side of the first surface of the glass back plate, and an edge of a light-emitting surface of the light-emitting board is adhered to the second adhesive surface.

2. The backlight module according to claim 1, characterized in that: The orthographic projection area of ​​the first adhesive surface on the glass back plate is in a ring shape.

3. The backlight module according to claim 2, characterized in that: The orthographic projection area of ​​the second adhesive surface on the glass back plate is in a ring shape.

4. The backlight module according to claim 3, characterized in that: From the edge of the glass back plate to the center direction, the width of the first adhesive surface is greater than the width of the second adhesive surface.

5. The backlight module according to claim 4, characterized in that: The first adhesive surface is adhered to the first surface of the glass back plate via a first adhesive layer; the second adhesive surface is adhered to the light emitting board via a second adhesive layer.

6. The backlight module according to claim 5, characterized in that: The first adhesive layer and the second adhesive layer are made of the same material.

7. The backlight module according to claim 1, characterized in that: The orthographic projection of the light emitting panel on the glass back plate is located within the first surface range of the glass back plate.

8. The backlight module according to any one of claims 1 to 7, characterized in that: The material of the glass back plate is glass.

9. The backlight module according to claim 8, characterized in that: The rubber frame is an integrated structure.

10. The backlight module according to claim 1, characterized in that: It also includes a diffusion plate. A third adhesive surface for supporting the diffusion plate is formed on one side of the plastic frame away from the glass back plate, and the edge of the diffusion plate is adhered to the third adhesive surface.

11. The backlight module according to claim 10, characterized in that: The orthographic projection of the third adhesive surface on the glass back plate is located within the orthographic projection of the second adhesive surface on the glass back plate.

12. The backlight module according to claim 11, characterized in that: It also includes a film material structure layer, and the film material structure layer is located on a side of the diffuser plate away from the glass back plate; The orthographic projection of the film material structure layer on the glass back plate covers the orthographic projection of the diffusion plate on the glass back plate.

13. A display module, characterized in that: A liquid crystal display and a backlight module according to any one of claims 1 to 12, wherein the backlight module comprises: a film material structure layer and a diffusion plate; The liquid crystal display screen is located on a side of the film material structure layer away from the diffusion plate; The edge of the liquid crystal display screen is bonded to the glue frame.

14. The display module according to claim 13, characterized in that: In a direction perpendicular to the liquid crystal display screen, the sum of the thicknesses of the liquid crystal display screen, the film material structure layer, the diffusion plate, the light-emitting plate and the glass back plate is less than or equal to the thickness of the plastic frame.

15. A display device, characterized in that: Comprising a metal shielding cover and the display module according to claim 13 or 14; The metal shielding cover is arranged on the second surface of the glass back plate.

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