Backlight module and display device

Abstract

The utility model provides a backlight module and a display device, the backlight module comprises a light emitting unit and a light source support, the light source support comprises a first support inner wall and a second support inner wall which are oppositely arranged in a first direction, and a third support inner wall and a fourth support inner wall which are oppositely arranged in a second direction, a first containing cavity is defined by the first support inner wall, the second support inner wall, the third support inner wall and the fourth support inner wall, and the light-emitting unit is arranged in the first containing cavity. The included angle between the inner wall of the first support and the inner wall of the second support is larger than or equal to 90 degrees and smaller than 98 degrees, and the included angle between the inner wall of the third support and the inner wall of the fourth support is larger than or equal to 148 degrees and smaller than 154 degrees, so that the opening area of the light emitting side of the first containing cavity is increased, and meanwhile the light gathering effect of the light source support is improved; more light rays can be emitted from the opening of the first accommodating cavity, so that the light emitting efficiency of the light emitting unit is improved.

Description

Technical Field

[0001] The utility model belongs to the field of display technology, and in particular relates to a backlight module and a display device. Background Art

[0002] With the continuous development and improvement of display technology, people have put forward higher requirements for the display quality and effect of electronic devices. At present, when electronic devices are working normally, they need to be equipped with a light source to provide them with relevant light. As the product energy efficiency standards continue to improve, the light output efficiency of the light source will directly affect the performance of the equipment and its competitiveness.

[0003] For example, a common liquid crystal display device may include a display panel and a backlight module. The backlight module is an important part of the liquid crystal display device. The power consumption of the backlight module accounts for about 75% of the entire display device. Therefore, the development and research of backlight module power saving technology has always been a hot topic. Currently, a more commonly used method is to add a reflective polarized brightening film (Dual Brightness Enhancement Film, DBEF) to the backlight module, thereby improving the light efficiency of the backlight module, but its cost is increased, which is not conducive to large-scale promotion and application. Utility Model Content

[0004] The embodiments of the present invention provide a display module and a display device to alleviate the deficiencies in the related art.

[0005] To achieve the above functions, the technical solutions provided by the embodiments of the present invention are as follows:

[0006] The present invention provides a backlight module, comprising:

[0007] Light emitting unit;

[0008] A light source bracket, comprising a plurality of bracket inner walls, wherein the plurality of bracket inner walls enclose a first accommodating cavity, and the light emitting unit is disposed in the first accommodating cavity;

[0009] Among them, along the first direction, the angle between the two relative inner walls of the light source bracket is greater than or equal to 87 degrees and less than or equal to 92 degrees; along the second direction, the angle between the two relative inner walls of the light source bracket is greater than or equal to 148 degrees and less than or equal to 154 degrees, and the first direction and the second direction form a preset angle.

[0010] Optionally, in one embodiment, the light source bracket includes a first top surface and a first supporting surface that are arranged opposite to each other, the first top surface is located at the light emitting side of the first accommodating cavity, and the first supporting surfaces are respectively connected to the inner walls of the bracket on all sides;

[0011] Among them, along the first direction, the distance between the inner walls of the two brackets at the first top surface is greater than or equal to 2 mm and less than or equal to 2.1 mm, and the distance between the inner walls of the two brackets at the first supporting surface is greater than or equal to 0.9 mm and less than or equal to 1.4 mm.

[0012] Optionally, in one embodiment, along the second direction, a distance between the two inner walls of the bracket at the first supporting surface is greater than or equal to 3.83 mm and less than or equal to 3.9 mm.

[0013] Optionally, in one embodiment, the light source bracket includes a first bracket inner wall and a second bracket inner wall arranged opposite to each other in the first direction, and a third bracket inner wall and a fourth bracket inner wall arranged opposite to each other in the second direction, and the first bracket inner wall, the second bracket inner wall, the third bracket inner wall and the fourth bracket inner wall enclose the first accommodating cavity;

[0014] The inner wall of the first bracket and the inner wall of the second bracket are symmetrically arranged with respect to the light emitting unit, and the inner wall of the third bracket and the inner wall of the fourth bracket are symmetrically arranged with respect to the light emitting unit.

[0015] Optionally, in one embodiment, the area of ​​the inner wall of the first bracket is equal to the area of ​​the inner wall of the second bracket, the area of ​​the inner wall of the third bracket is equal to the area of ​​the inner wall of the fourth bracket, and the area of ​​the inner wall of the first bracket is smaller than the area of ​​the inner wall of the third bracket.

[0016] Optionally, in one embodiment, the backlight module further includes:

[0017] A back plate, comprising a bottom plate and a side plate, wherein the side plate extends in a direction away from the bottom plate, and the bottom plate and the side plate form a second accommodating cavity;

[0018] A light guide plate, disposed on the bottom plate, and located in the second accommodating cavity;

[0019] Among them, the light source bracket is located on a side of the side plate close to the light guide plate, the first top surface is located on a side of the first accommodating cavity close to the light guide plate, and the orthographic projection of the first top surface on the light guide plate is located inside the light guide plate.

[0020] Optionally, in one embodiment, the thickness of the light guide plate is greater than or equal to 2.5 mm.

[0021] Optionally, in one embodiment, the light guide plate includes a light incident surface, a light emitting surface, and a bottom surface arranged opposite to the light emitting surface, the light incident surface is located on a side of the light guide plate close to the light emitting unit, and the light incident surface connects the bottom surface and the light emitting surface;

[0022] The light guide plate is provided with a plurality of mesh dot structures on the bottom surface, and the mesh dot structure has an inclined surface on a side close to the light incident surface, and an angle between the inclined surface and the bottom surface is greater than or equal to 20 degrees and less than or equal to 30 degrees.

[0023] Optionally, in one embodiment, the spacing between adjacent mesh dot structures is greater than or equal to 60 micrometers and less than or equal to 65 micrometers.

[0024] An embodiment of the utility model further provides a display device, comprising a display panel and any one of the above-mentioned backlight modules; wherein the backlight module is located on one side of the backlight of the display panel.

[0025] Beneficial effects of the embodiments of the utility model: The utility model provides a backlight module and a display device, the backlight module includes a light-emitting unit and a light source bracket, the light source bracket includes a first bracket inner wall and a second bracket inner wall arranged opposite to each other in a first direction, and a third bracket inner wall and a fourth bracket inner wall arranged opposite to each other in a second direction, the first bracket inner wall, the second bracket inner wall, the third bracket inner wall and the fourth bracket inner wall form a first accommodating cavity, and the light-emitting unit is arranged in the first accommodating cavity; by setting the angle between the first bracket inner wall and the second bracket inner wall to be greater than or equal to 90 degrees and less than 98 degrees, and the angle between the third bracket inner wall and the fourth bracket inner wall to be greater than or equal to 148 degrees and less than 154 degrees, the opening area of ​​the light-emitting side of the first accommodating cavity is increased, and at the same time, the light gathering effect of the light source bracket is improved, so that more light can be emitted from the opening of the first accommodating cavity, thereby improving the light-emitting efficiency of the light-emitting unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of the structure of a backlight module provided by an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of the assembly structure of the light source bracket and the light-emitting unit provided in an embodiment of the utility model;

[0029] Figure 3 for Figure 2 Schematic diagram of the cross section at A-Aˋ in the middle;

[0030] Figure 4 for Figure 2 Schematic diagram of the cross section at B-Bˋ in the middle;

[0031] Figure 5 It is a structural schematic diagram of an existing light source bracket;

[0032] Figure 6 for Figure 5 Schematic diagram of the cross section at C-Cˋ in the middle;

[0033] Figure 7 for Figure 5 Schematic diagram of the cross section at D-Dˋ in the middle;

[0034] Figure 8 A schematic diagram of the structure of a light guide plate provided in an embodiment of the utility model;

[0035] Fig. 9 A light path diagram of a backlight module provided by an embodiment of the utility model;

[0036] Fig.10 It is a light path diagram of the existing backlight module;

[0037] Fig.11A A top view of a light source bracket provided by an embodiment of the utility model;

[0038] Fig. 11B A front view of a light source bracket provided by an embodiment of the utility model;

[0039] Fig. 11C A side view of a light source bracket provided by an embodiment of the utility model;

[0040] Fig.12 A schematic diagram of the structure of a display device provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the actual use or working mode of the device, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only, and the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The disclosure below provides many different embodiments for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, 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 invention. In addition, the present invention provides various specific examples of processes and materials, but those skilled in the art can recognize the application of other processes and / or the use of other materials.

[0045] The embodiments of the present utility model provide a backlight module and a display device. The following are detailed descriptions of each embodiment. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0046] Please combine Figure 1 and Figure 2 ;in, Figure 1 A schematic diagram of the structure of a backlight module provided by an embodiment of the utility model; Figure 2 This is a schematic diagram of the assembly structure of the light source bracket and the light-emitting unit provided in an embodiment of the utility model.

[0047] The present embodiment provides a backlight module 1, which includes a light-emitting unit 20 and a light source bracket 10. The light source bracket 10 is used to support and fix the light-emitting unit 20. The light source bracket 10 includes a plurality of bracket inner walls 11. The plurality of bracket inner walls 11 form a first accommodating cavity 100. The light-emitting unit 20 is disposed in the first accommodating cavity 100. The light-emitting unit 20 can be a light-emitting diode (LED), and the present embodiment does not impose any specific restrictions on this.

[0048] Specifically, a plurality of the bracket inner walls 11 are connected in sequence and surround the light emitting unit 20 to form the first accommodating cavity 100. The light source bracket 10 includes a first top surface 110 and a first supporting surface 120 that are relatively arranged. The first top surface 110 is located on the light emitting side of the first accommodating cavity 100. The first supporting surface 120 is respectively connected to the bracket inner walls 11 around it, and when the light emitting unit 20 emits light, the light can be emitted from the first supporting surface 120 of the first accommodating cavity 100 toward the first top surface 110 of the first accommodating cavity 100.

[0049] Optionally, in one embodiment, the light source bracket 10 further includes a boss 12 , the boss 12 is disposed on the first supporting surface 120 , the height of the boss 12 is greater than the height of the first supporting surface 120 , and the light emitting unit 20 is correspondingly disposed on the boss 12 .

[0050] Optionally, in one embodiment, the light source bracket 10 also includes a Zener tube 13, which is arranged on the first supporting surface 120, and the Zener tube 13 is spaced apart from the boss 12. The light-emitting unit 20 can use an LED chip, and the Zener tube 13 can be connected to an electrode at one end of the LED chip to prevent the LED chip from being broken down by static electricity.

[0051] Furthermore, please combine Figure 1 , Figure 2 , Figure 3 and Figure 4 ;in, Figure 3 for Figure 2 Schematic diagram of the cross section at A-Aˋ in the middle; Figure 4 for Figure 2 Schematic diagram of the cross section at B-Bˋ in the figure.

[0052] In one embodiment, along the first direction X, the angle α1 between the two relative bracket inner walls 11 of the light source bracket 10 is greater than or equal to 87 degrees and less than or equal to 92 degrees; along the second direction Y, the angle β1 between the two relative bracket inner walls 11 of the light source bracket 10 is greater than or equal to 148 degrees and less than or equal to 154 degrees, and the first direction X and the second direction Y form a preset angle.

[0053] It should be noted that, in this embodiment, the technical solution of the utility model is illustrated by taking the first direction as the X direction, the second direction as the Y direction and the preset angle as 90 degrees, that is, the angle between the two relative bracket inner walls 11 of the light source bracket 10 can be adjusted according to the requirements of different products to form different light source bracket 10 structures, which will not be repeated here.

[0054] It is understandable that in the related art, liquid crystal display devices usually adopt a reflective polarized brightness enhancement film (Dual Brightness Enhancement Film, DBEF) added to the backlight module, so as to improve the light efficiency of the backlight module, but its cost is increased, which is not conducive to large-scale promotion and application; in this embodiment, by setting the angle α1 between the two relative bracket inner walls 11 of the light source bracket 10 along the first direction X to be greater than or equal to 87 degrees and less than or equal to 92 degrees; along the second direction Y, the angle β1 between the two relative bracket inner walls 11 of the light source bracket 10 is greater than or equal to 148 degrees and less than or equal to 154 degrees, thereby increasing the opening area of ​​the light-emitting side of the first accommodating cavity 100, and at the same time enhancing the light gathering effect of the light source bracket 10, so that more light can be emitted from the opening of the first accommodating cavity 100, thereby improving the light output efficiency of the light-emitting unit 20.

[0055] Please continue to combine Figure 2 , Figure 3 ,and Figure 4 In one embodiment, along the first direction X, the spacing D1 between the two bracket inner walls 11 at the first top surface 110 is greater than or equal to 2 mm and less than or equal to 2.1 mm; along the first direction X, the spacing D2 between the two bracket inner walls 11 at the first supporting surface 120 is greater than or equal to 0.9 mm and less than or equal to 1.4 mm; along the second direction Y, the spacing D3 between the two bracket inner walls 11 at the first top surface 110 is 6 mm; along the second direction Y, the spacing D4 between the two bracket inner walls 11 at the first supporting surface 120 is greater than or equal to 3.83 mm and less than or equal to 3.9 mm, so that the first accommodating cavity 100 forms an inverted trapezoidal cross-section shape that is narrow at the bottom and wide at the top. Since the first top surface 110 on the light-emitting side of the first accommodating cavity 100 is larger, it is ensured that more light can be emitted from the first top surface 110, thereby ensuring the light-emitting efficiency of the light-emitting unit 20.

[0056] Please combine Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 ;in, Figure 5 It is a structural schematic diagram of an existing light source bracket; Figure 6 for Figure 5 Schematic diagram of the cross section at C-Cˋ in the middle; Figure 7 for Figure 5 Schematic diagram of the cross section at D-Dˋ in the figure.

[0057] The existing light source bracket 2A includes a plurality of bracket inner walls 11, and the plurality of bracket inner walls 11 form a third accommodating cavity 300, and the third accommodating cavity 300 is used to accommodate the light-emitting unit. The existing light source bracket 2A includes a third top surface 310 and a second supporting surface 320 that are relatively arranged, and the third top surface 310 is located on the light-emitting side of the third accommodating cavity 300, and the second supporting surface 320 is respectively connected to the bracket inner walls 11 around it, and when the light-emitting unit 20 emits light, the light can be emitted from the second supporting surface 320 of the third accommodating cavity 300 toward the third top surface 310 of the third accommodating cavity 300.

[0058] Among them, along the first direction X, the angle α2 between the two bracket inner walls 11 of the existing light source bracket 2A is 98 degrees, the distance d1 between the two bracket inner walls 11 at the third top surface 310 is 1.5 mm, and the distance d2 between the two bracket inner walls 11 at the second supporting surface is 0.9 mm; along the second direction Y, the angle β2 between the two bracket inner walls 11 of the existing light source bracket 2A is 154 degrees, the distance d3 between the two bracket inner walls 11 at the third top surface 310 is 6 mm, and the distance d4 between the two bracket inner walls 11 at the second supporting surface 320 is 3.83 mm.

[0059] Preferably, in one embodiment, along the first direction X, the angle α1 between the two relative bracket inner walls 11 of the light source bracket 10 is 90 degrees, the distance D1 between the two relative bracket inner walls 11 at the first top surface 110 is 2 mm, and the distance D2 between the two relative bracket inner walls 11 at the first supporting surface 120 is 1.4 mm; along the second direction Y, the angle β1 between the two relative bracket inner walls 11 of the light source bracket 10 is 148 degrees, the distance D3 between the two relative bracket inner walls 11 at the first top surface 110 is 6 mm, and the distance D5 between the two relative bracket inner walls 11 at the first supporting surface 120 is 3.9 mm.

[0060] It should be noted that, in this embodiment, α1 is 90 degrees, β1 is 148 degrees, D1 is 2 mm, D2 is 1.4 mm, D3 is 6 mm, and D4 is 3.9 mm as examples to illustrate the technical solution of the utility model.

[0061] Combination Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7It can be known that the first top surface 110 of the first accommodating cavity 100 of the light source bracket 10 described in the present embodiment is larger than the third opening 320 of the third accommodating cavity 300 in the existing light source bracket 2A, so that the light emitting area of ​​the light emitting unit 20 described in the present embodiment is also larger than the light emitting area of ​​the existing light emitting unit 20 of the same size, thereby improving the light emitting efficiency of the light emitting unit 20; at the same time, compared with the existing light source bracket 2A, the present embodiment increases the area of ​​the first supporting surface 120, so that the first accommodating cavity 100 can accommodate the light emitting unit 20 of a larger size, thereby increasing the possibility of selecting the size of the light emitting unit 20, and thereby enabling the backlight module 1 to meet the light emitting requirements of different display devices.

[0062] Please continue reading Figure 2 In one embodiment, the light source bracket 10 includes a first bracket inner wall 11A and a second bracket inner wall 11B arranged opposite to each other in the first direction X, and a third bracket inner wall 11C and a fourth bracket inner wall 11D arranged opposite to each other in the second direction Y, and the first bracket inner wall 11A, the second bracket inner wall 11B, the third bracket inner wall 11C and the fourth bracket inner wall 11D form the first accommodating cavity 100; wherein the first bracket inner wall 11A and the second bracket inner wall 11B are symmetrically arranged with respect to the light-emitting unit 20, and the third bracket inner wall 11C and the fourth bracket inner wall 11D are symmetrically arranged with respect to the light-emitting unit 20.

[0063] Specifically, the first bracket inner wall 11A, the second bracket inner wall 11B, the third bracket inner wall 11C and the fourth bracket inner wall 11D are connected in sequence, and the first supporting surface 120 is connected to the first bracket inner wall 11A, the second bracket inner wall 11B, the third bracket inner wall 11C and the fourth bracket inner wall 11D respectively; the angle α1 between the third bracket inner wall 11C and the fourth bracket inner wall 11D is greater than or equal to 87 degrees and less than or equal to 92 degrees, and the angle β1 between the first bracket inner wall 11A and the second bracket inner wall 11B is greater than or equal to 148 degrees and less than or equal to 154 degrees; it should be noted that the above-mentioned angles can also be adjusted according to the requirements of different products to form different light source bracket 10 structures, which will not be elaborated in this embodiment.

[0064] It can be understood that in this embodiment, the first bracket inner wall 11A and the second bracket inner wall 11B are symmetrically arranged about the light-emitting unit 20, and the third bracket inner wall 11C and the fourth bracket inner wall 11D are symmetrically arranged about the light-emitting unit 20, so as to improve the focusing performance of the light source bracket 10 and ensure the consistency of the light effect between different positions in the first accommodating cavity 100.

[0065] Optionally, in one embodiment, when different bracket inner walls 11 are connected, they can be transitioned and connected through arcs or arc shapes, thereby forming the light source bracket 10 in the utility model.

[0066] Furthermore, in one embodiment, the area of ​​the first bracket inner wall 11A is equal to the area of ​​the second bracket inner wall 11B, the area of ​​the third bracket inner wall 11C is equal to the area of ​​the fourth bracket inner wall 11D, and the area of ​​the first bracket inner wall 11A is smaller than the area of ​​the third bracket inner wall 11C, so that the third bracket inner wall 11C and the fourth bracket inner wall 11D can gather more light and make the gathered light emitted from the first top surface 110 of the first accommodating cavity 100, thereby improving the luminous efficiency of the light-emitting unit 20.

[0067] Please combine Figure 1 and Figure 8 ;in, Figure 8 A schematic diagram of the structure of the light guide plate provided in an embodiment of the utility model; in one embodiment, the backlight module 1 also includes a back plate 30, a light guide plate 40 and an optical film group 50; the back plate 30 includes a bottom plate 31 and a side plate 32, the side plate 32 extends in a direction away from the bottom plate 31, the bottom plate 31 and the side plate 32 form a second accommodating cavity 200, the light guide plate 40 and the optical film group 50 are located in the first accommodating cavity 100, and the optical film group 50 is located on the side of the light guide plate 40 away from the bottom plate 31.

[0068] Further, the light guide plate 40 is arranged on the base plate 31, and the optical film group 50 is arranged on the side of the light guide plate 40 away from the base plate 31, and the optical film group 50 includes a multilayer optical film; specifically, the optical film group 50 includes but is not limited to at least one of a diffuser or a prism; wherein the light source bracket 10 is located on the side of the side plate 32 close to the light guide plate 40, the first top surface 110 is located on the side of the first accommodating cavity 100 close to the light guide plate 40, and the orthographic projection of the first top surface 110 on the light guide plate 40 is located inside the light guide plate 40.

[0069] Specifically, the light source bracket 10 is located in the second accommodating cavity 200 , the light emitting unit 20 is disposed on a side of the light source bracket 10 close to the light guide plate 40 , and the thickness D5 of the light guide plate 40 is greater than or equal to 2.5 mm.

[0070] Specifically, please combine Figure 8 , Fig. 9 and Fig.10 ;in, Fig. 9 A light path diagram of a backlight module provided by an embodiment of the utility model; Fig.10This is a light path diagram of an existing backlight module.

[0071] In one embodiment, the light guide plate 40 includes a light incident surface 41, a light emitting surface 42, and a bottom surface 43 arranged opposite to the light emitting surface, wherein the light incident surface 41 is located on a side of the light guide plate 40 close to the light emitting unit 20, and the light incident surface 41 connects the bottom surface 43 and the light emitting surface 42; wherein the light guide plate 40 is provided with a plurality of mesh structures 410 ( Fig. 9 Only one is drawn), the mesh structure 410 has an inclined surface 411 on one side close to the light incident surface 41, and an angle γ1 between the inclined surface 411 and the bottom surface 43 is an acute angle.

[0072] Specifically, the angle γ between the inclined surface 411 and the bottom surface 43 is greater than or equal to 20 degrees and less than or equal to 30 degrees, the spacing D6 between adjacent dot structures 410 is greater than or equal to 60 microns and less than or equal to 65 microns, the thickness of the dot structure 410 is 6 microns, and the shape of the inclined surface 411 is one of a rectangle, a triangle or an arc, and this embodiment does not impose any specific restrictions on this.

[0073] like Fig.10 As shown, in the existing backlight module 2, the thickness of the existing light guide plate 40A is 2 mm, the existing light guide plate 40A includes a light incident surface 40A1, a light emitting surface 40A2 and a second supporting surface 40A3 arranged opposite to the light emitting surface 40A2, and the existing light guide plate 40A includes a plurality of existing mesh structures 41A ( Fig.10 Only one is drawn), the existing mesh structure 41A has an inclined surface (not marked in the figure) on the side close to the light incident surface 40A1, the angle between the inclined surface and the second supporting surface 40A3 is greater than or equal to 40 degrees and less than or equal to 50 degrees, and the shape of the inclined surface is one of a circle or an ellipse.

[0074] Combination Fig. 9 and Fig.10 It can be understood that, in this embodiment, the angle γ1 between the inclined surface 411 of the mesh dot structure 410 and the first supporting surface 120 is greater than or equal to 20 degrees and less than or equal to 30 degrees, and the spacing D6 between adjacent mesh dot structures 410 is greater than or equal to 60 microns and less than or equal to 65 microns, so that the light emitted by the light-emitting unit 20 is concentrated, the light loss is reduced, and the light output brightness of the light-emitting unit 20 is improved.

[0075] For further information, see Figures 11A to 11C ;in, Fig.11A A top view of a light source bracket provided by an embodiment of the utility model; Fig. 11B A front view of a light source bracket provided by an embodiment of the utility model; Fig. 11C A side view of a light source bracket provided in an embodiment of the utility model.

[0076] In one embodiment, when the backlight module 1 is assembled, a fixing bracket 60 can be provided on a side of the light source bracket 10 away from the light emitting unit 20 , thereby effectively fixing the light source bracket 10 and improving the stability of subsequent installation of the light emitting unit 20 .

[0077] See also Fig.12 , is a schematic diagram of the structure of the display device provided in an embodiment of the utility model.

[0078] This embodiment provides a display device, wherein the display device 3 includes a display panel 3A and a backlight module 1; wherein the backlight module 1 is located on a backlight side of the display panel 3A, and the display panel 3A may be a liquid crystal display panel, which is not specifically limited in this embodiment.

[0079] It can be understood that the backlight module 1 has been described in detail in the above embodiments, and will not be repeated here.

[0080] In specific applications, the display device 3 can be a display screen of a smart phone, tablet computer, laptop computer, smart bracelet, smart watch, smart glasses, smart helmet, desktop computer, smart TV or digital camera, and can even be used on electronic devices with flexible display screens.

[0081] Specifically, in one embodiment, the thickness of the light guide plate in Comparative Example 1, Comparative Example 2 and Example 1 is different, the structure of the optical film group is different, and the structure of the light source bracket is different; please refer to Table 1 below for details.

[0082]

[0083] Table 1

[0084] The display device 3 provided in Example 1 includes the light source bracket 10 in any of the above-mentioned embodiments, wherein, along the first direction X, the angle α1 between the two relative bracket inner walls 11 of the light source bracket 10 is 90 degrees, the distance D1 between the two relative bracket inner walls 11 at the first top surface 110 is 2 mm, and the distance D2 between the two relative bracket inner walls 11 at the first bottom surface 120 is 1.4 mm; along the second direction Y, the angle β1 between the two relative bracket inner walls 11 of the light source bracket 10 is 148 degrees, the distance D3 between the two relative bracket inner walls 11 at the first top surface 110 is 6 mm, and the distance D5 between the two relative bracket inner walls 11 at the first bottom surface 120 is 3.9 mm.

[0085] The existing display devices provided in Comparative Examples 1 and 2 include: Figure 5 The existing light source bracket 2A is shown; wherein, along the first direction X, the angle α2 between the two bracket inner walls 11 of the existing light source bracket 2A is 98 degrees, the distance d1 between the two bracket inner walls 11 at the third top surface 310 is 1.5 mm, and the distance d2 between the two bracket inner walls 11 at the third bottom surface is 0.9 mm; along the second direction Y, the angle β2 between the two bracket inner walls 11 of the existing light source bracket 2A is 154 degrees, the distance d3 between the two bracket inner walls 11 at the third top surface 310 is 6 mm, and the distance d4 between the two bracket inner walls 11 at the third bottom surface 320 is 3.83 mm.

[0086] It should be noted that the thickness of the existing backlight module 2 of the display device provided in Example 1, the thickness of the existing backlight module 2 of the display device provided in Example 2, and the thickness of the backlight module 1 of the display device 3 provided in Example 1 are all equal, and this example does not limit the numerical value of H.

[0087] In comparative example 1, the display device includes an optical film group 50A, and the optical film group 50A includes a first optical film 51A, a second optical film 52A, and a third optical film 53A stacked on a light guide plate 40A, wherein the first optical film 51A is a diffuser, the second optical film 52A is a diffuser, and the third optical film 53A is a prism. In comparative example 2, the display device includes an optical film group 50A, and the optical film group 50A includes a first optical film 51A stacked on a light guide plate 40A. , a second optical film 52A and a third optical film 53A, the first optical film 51A is a diffuser, the second optical film 52A is a prism, and the third optical film 53A is a reflective polarized brightness enhancement film. In the display device 3 provided in Example 1, the optical film group 50 includes a first optical film 51, a second optical film 52 and a third optical film 53 stacked on the light guide plate 40, the first optical film 51 is a diffuser, the second optical film 52 is a prism, and the third optical film 53 is a prism.

[0088] In comparative example 1, the thickness of the light guide plate 40A is 2.0T, in comparative example 2, the thickness of the light guide plate 40A is 2.0T, and in embodiment 1, the thickness of the light guide plate 40 is 2.5T.

[0089] It can be seen from Table 1 that, compared with Comparative Example 1, Comparative Example 2 adds a reflective polarized light enhancement film to the backlight module 1, thereby improving the light efficiency of the backlight module 1. However, the cost of the reflective polarized light enhancement film is increased, which is not conducive to large-scale promotion and application.

[0090] Compared with Comparative Example 1 and Comparative Example 2, in the light source bracket 10 provided in Example 1, the first top surface 110 of the first accommodating cavity 100 is larger than the third top surface 310 of the third accommodating cavity 300 in the existing light source bracket 2A, so that the light emitting area of ​​the light emitting unit 20 in Example 1 is larger than the light emitting area of ​​the light emitting unit 20 in the existing Comparative Example 1 and Comparative Example 2 of the same size, thereby improving the light emitting efficiency of the light emitting unit 20, thereby improving the light emitting effect of the display device; and, compared with Comparative Example 2, the light efficiency of the backlight module 1 is improved by adding a reflective polarized brightening film, and Example 1 does not need to additionally set a reflective polarized brightening film, thereby reducing the process cost of the backlight module 1.

[0091] In another embodiment, the thickness of the light guide plate in Comparative Example 1, Comparative Example 2 and Example 2 is different, the structure of the optical film group is different, and the structure of the light source bracket is different; please refer to the following for details.

[0092] Table 2.

[0093]

[0094] Table 2

[0095] The display device 3 provided in Example 1 includes the light source bracket 10 in any of the above-mentioned embodiments, wherein, along the first direction X, the angle α1 between the two bracket inner walls 11 of the light source bracket 10 is 89.5 degrees, the distance D1 between the two bracket inner walls 11 at the first top surface 110 is 2.05 mm, and the distance D2 between the two bracket inner walls 11 at the first bottom surface 120 is 1.15 mm; along the second direction Y, the angle β1 between the two bracket inner walls 11 of the light source bracket 10 is 151 degrees, the distance D3 between the two bracket inner walls 11 at the first top surface 110 is 6 mm, and the distance D5 between the two bracket inner walls 11 at the first bottom surface 120 is 3.865 mm.

[0096] The existing display devices provided in Comparative Examples 1 and 2 include: Figure 5The existing light source bracket 2A is shown; wherein, along the first direction X, the angle α2 between the two bracket inner walls 11 of the existing light source bracket 2A is 98 degrees, the distance d1 between the two bracket inner walls 11 at the third top surface 310 is 1.5 mm, and the distance d2 between the two bracket inner walls 11 at the third bottom surface is 0.9 mm; along the second direction Y, the angle β2 between the two bracket inner walls 11 of the existing light source bracket 2A is 154 degrees, the distance d3 between the two bracket inner walls 11 at the third top surface 310 is 6 mm, and the distance d4 between the two bracket inner walls 11 at the third bottom surface 320 is 3.83 mm.

[0097] It should be noted that the thickness of the existing backlight module 2 of the display device provided in Example 1, the thickness of the existing backlight module 2 of the display device provided in Example 2, and the thickness of the backlight module 1 of the display device 3 provided in Example 1 are all equal, and this example does not limit the numerical value of H.

[0098] In comparative example 1, the display device includes an optical film group 50A, and the optical film group 50A includes a first optical film 51A, a second optical film 52A, and a third optical film 53A stacked on a light guide plate 40A, wherein the first optical film 51A is a diffuser, the second optical film 52A is a diffuser, and the third optical film 53A is a prism. In comparative example 2, the display device includes an optical film group 50A, and the optical film group 50A includes a first optical film 51A stacked on a light guide plate 40A. , a second optical film 52A and a third optical film 53A, the first optical film 51A is a diffuser, the second optical film 52A is a prism, and the third optical film 53A is a reflective polarized brightness enhancement film. In the display device 3 provided in Example 1, the optical film group 50 includes a first optical film 51, a second optical film 52 and a third optical film 53 stacked on the light guide plate 40, the first optical film 51 is a diffuser, the second optical film 52 is a prism, and the third optical film 53 is a prism.

[0099] In comparative example 1, the thickness of the light guide plate 40A is 2.0T, in comparative example 2, the thickness of the light guide plate 40A is 2.0T, and in embodiment 1, the thickness of the light guide plate 40 is 2.5T.

[0100] It can be seen from Table 2 that, compared with Comparative Example 1, Comparative Example 2 adds a reflective polarized light enhancement film to the backlight module 1, thereby improving the light efficiency of the backlight module 1. However, the cost of the reflective polarized light enhancement film is increased, which is not conducive to large-scale promotion and application.

[0101] Compared with Comparative Example 1 and Comparative Example 2, in the light source bracket 10 provided in Example 2, the first top surface 110 of the first accommodating cavity 100 is larger than the third top surface 310 of the third accommodating cavity 300 in the existing light source bracket 2A, so that the light emitting area of ​​the light emitting unit 20 in Example 1 is larger than the light emitting area of ​​the light emitting unit 20 in the existing Comparative Example 1 and Comparative Example 2 of the same size, thereby improving the light emitting efficiency of the light emitting unit 20, thereby improving the light emitting effect of the display device; and, compared with Comparative Example 2, in which the light effect of the backlight module 1 is improved by adding a reflective polarized brightening film, Example 2 does not need to additionally set a reflective polarized brightening film, and can also significantly improve the light effect of the backlight module 1, thereby reducing the process cost of the backlight module 1.

[0102] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0103] The above is a detailed introduction to a backlight module and a display device provided in an embodiment of the utility model. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the utility model. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with 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 utility model.

Claims

1. A backlight module, characterized in that: include: Light emitting unit; A light source bracket, comprising a plurality of bracket inner walls, wherein the plurality of bracket inner walls enclose a first accommodating cavity, and the light emitting unit is disposed in the first accommodating cavity; Among them, along the first direction, the angle between the two relative inner walls of the light source bracket is greater than or equal to 87 degrees and less than or equal to 92 degrees, and along the second direction, the angle between the two relative inner walls of the light source bracket is greater than or equal to 148 degrees and less than or equal to 154 degrees, and the first direction and the second direction form a preset angle.

2. The backlight module according to claim 1, characterized in that: The light source bracket comprises a first top surface and a first supporting surface which are arranged opposite to each other, the first top surface is located at the light emitting side of the first accommodating cavity, and the first supporting surface is respectively connected to the bracket inner walls around it; Among them, along the first direction, the distance between the two inner walls of the bracket at the first top surface is greater than 1.5 mm and less than or equal to 2 mm, and the distance between the two inner walls of the bracket at the first supporting surface is greater than 0.9 mm and less than or equal to 1.4 mm.

3. The backlight module according to claim 2, characterized in that: Along the second direction, the distance between the two inner walls of the bracket at the first supporting surface is greater than or equal to 3.83 mm and less than or equal to 3.9 mm.

4. The backlight module according to any one of claims 1 to 3, characterized in that: The light source bracket comprises a first bracket inner wall and a second bracket inner wall arranged opposite to each other in the first direction, and a third bracket inner wall and a fourth bracket inner wall arranged opposite to each other in the second direction, wherein the first bracket inner wall, the second bracket inner wall, the third bracket inner wall and the fourth bracket inner wall enclose the first accommodating cavity; The inner wall of the first bracket and the inner wall of the second bracket are symmetrically arranged with respect to the light emitting unit, and the inner wall of the third bracket and the inner wall of the fourth bracket are symmetrically arranged with respect to the light emitting unit.

5. The backlight module according to claim 4, characterized in that: The area of ​​the inner wall of the first bracket is equal to the area of ​​the inner wall of the second bracket, the area of ​​the inner wall of the third bracket is equal to the area of ​​the inner wall of the fourth bracket, and the area of ​​the inner wall of the first bracket is smaller than the area of ​​the inner wall of the third bracket.

6. The backlight module according to claim 2, characterized in that: The backlight module also includes: A back plate, comprising a bottom plate and a side plate, wherein the side plate extends in a direction away from the bottom plate, and the bottom plate and the side plate form a second accommodating cavity; A light guide plate, disposed on the bottom plate, and located in the second accommodating cavity; Among them, the light source bracket is located on a side of the side plate close to the light guide plate, the first top surface is located on a side of the first accommodating cavity close to the light guide plate, and the orthographic projection of the first top surface on the light guide plate is located inside the light guide plate.

7. The backlight module according to claim 6, characterized in that: The thickness of the light guide plate is greater than or equal to 2.5 mm.

8. The backlight module according to claim 6, characterized in that: The light guide plate comprises a light incident surface, a light emitting surface and a bottom surface arranged opposite to the light emitting surface, the light incident surface is located on a side of the light guide plate close to the first top surface, and the light incident surface connects the bottom surface and the light emitting surface; The light guide plate is provided with a plurality of mesh dot structures on the bottom surface, and the mesh dot structure has an inclined surface on a side close to the light incident surface, and an angle between the inclined surface and the bottom surface is greater than or equal to 20 degrees and less than or equal to 30 degrees.

9. The backlight module according to claim 8, characterized in that: The spacing between adjacent mesh dot structures is greater than or equal to 60 micrometers and less than or equal to 65 micrometers.

10. A display device, characterized in that: It comprises a display panel and a backlight module as claimed in any one of claims 1 to 9; wherein the backlight module is arranged on one side of the backlight of the display panel.

Images