Backlight module, display module and display device

Abstract

According to the backlight module, the display module and the display device, the backlight module comprises a first light mixing area, a second light mixing area and at least one slope area located between the first light mixing area and the second light mixing area, and the light mixing distance in the first light mixing area is smaller than the light mixing distance in the second light mixing area. The backlight module further comprises a back plate, a light source, a lens set, a reflecting film, a diffusion plate and a middle frame. The back plate comprises a first plate body located in the first light mixing area, a second plate body located in the second light mixing area and a slope body located in the slope area. The light source comprises a plurality of first point light sources located in the first light mixing area and a plurality of second point light sources located in the second light mixing area. The lens group comprises a reflective lens positioned on the first point light source and a refractive lens positioned on the second point light source; the reflecting film is positioned on one side of the backboard close to the light source; the diffusion plate is located on one side of the lens group away from the backboard; and the middle frame is arranged around the back plate.

Description

Technical Field

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

[0002] In the related art, the overall thickness of the direct-type display device is relatively large, especially the thickness of the protruding part on the back is large, and the back shape is a two-step or multi-step design, which has poor aesthetics, high packaging costs, and poor wall adhesion. In addition, direct-type display devices are prone to problems such as uneven brightness, dark frames, and bright edges, resulting in poor image quality and affecting subjective visual effects.

[0003] The above information disclosed in this section is only for understanding the background of the inventive concept of the present disclosure and therefore the above information may contain information that does not constitute the prior art. Summary of the invention

[0004] In one aspect, a backlight module is provided, the backlight module comprising a first light mixing area, a second light mixing area and at least one slope area between the first light mixing area and the second light mixing area, the light mixing distance in the first light mixing area is smaller than the light mixing distance in the second light mixing area, the backlight module further comprising a back plate, a light source, a lens group, a reflective film, a diffuser plate and a middle frame; the back plate comprises a first plate body located in the first light mixing area, a second plate body located in the second light mixing area and a slope body located in the slope area, the first plate body is arranged parallel to the second plate body, the top of the slope body is connected to the first plate body, and the bottom of the slope body is connected to the second plate body; the light source comprises a plurality of first point light sources located in the first light mixing area and a plurality of second point light sources located in the second light mixing area; the lens group comprises a reflective lens located on the first point light source and a refractive lens located on the second point light source; the reflective film is located on a side of the back plate close to the light source; the diffuser plate is located on a side of the lens group away from the back plate; the middle frame is arranged around the back plate.

[0005] In another aspect, a display module is provided. The display module comprises the backlight module as described above and a display panel. The display panel is located on the light emitting surface of the backlight module.

[0006] In another aspect, a display device is provided. The display device includes the display module as described above and a power board. The power board is located on a side of a back plate in the first light mixing area away from the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Other objects and advantages of the present disclosure will be apparent from the following description of the present disclosure with reference to the accompanying drawings, and will help to have a comprehensive understanding of the present disclosure.

[0008] Figure 1 A rear view of a display device according to some embodiments of the present disclosure is schematically shown.

[0009] Figure 2 A side view of a display device according to some embodiments of the present disclosure is schematically shown.

[0010] Figure 3a and Figure 3b The display device according to some embodiments of the present disclosure is schematically shown along Figure 1 The cross-sectional view along the A-A' direction and Figure 1 Cross-sectional view along the BB' direction.

[0011] Figure 4 The structural diagram of the display module according to some embodiments of the present disclosure is schematically shown.

[0012] Figure 5a to Figure 5e The figure schematically shows a back view and a cross-sectional view of a backlight module according to some embodiments of the present disclosure.

[0013] Figure 6a The optical path diagram schematically shows a slope body in the shape of a convex arc surface according to some embodiments of the present disclosure.

[0014] Figure 6b The brightness curve diagram corresponding to the slope body being a convex arc shape according to some embodiments of the present disclosure is schematically shown.

[0015] Figure 7a The optical path diagram schematically shows a slope body having a concave arc shape according to some embodiments of the present disclosure.

[0016] Figure 7b The brightness curve diagram corresponding to the slope body being a concave arc shape according to some embodiments of the present disclosure is schematically shown.

[0017] Figure 8a The optical path diagram schematically shows that the slope body according to some embodiments of the present disclosure is in the shape of a section of a plane.

[0018] Figure 8b The figure schematically shows a brightness curve diagram corresponding to a slope body being a plane shape according to some embodiments of the present disclosure.

[0019] Fig. 9 The optical path diagram schematically shows a slope body in the shape of two plane sections according to some embodiments of the present disclosure.

[0020] Fig.10a A schematic diagram schematically shows that the angle between the slope body and the second plate body is 140 degrees according to some embodiments of the present disclosure.

[0021] Fig.10b A brightness curve diagram corresponding to an angle of 140 degrees between the slope body and the second plate body according to some embodiments of the present disclosure is schematically shown.

[0022] Fig.11a A schematic diagram schematically shows that the angle between the slope body and the second plate body is 120 degrees according to some embodiments of the present disclosure.

[0023] Fig.11b A brightness curve diagram corresponding to an angle of 120 degrees between the slope body and the second plate body according to some embodiments of the present disclosure is schematically shown.

[0024] Fig.12a A schematic diagram schematically shows that the angle between the slope body and the second plate body is 100 degrees according to some embodiments of the present disclosure.

[0025] Figure 12b A brightness curve diagram corresponding to an angle of 100 degrees between the slope body and the second plate body according to some embodiments of the present disclosure is schematically shown.

[0026] Fig.13 The following schematically shows a brightness curve diagram corresponding to the equally spaced arrangement of light sources according to some embodiments of the present disclosure.

[0027] Fig.14a A schematic diagram schematically shows the arrangement of light source arrays according to some embodiments of the present disclosure.

[0028] Fig.14b , Fig.14c and Fig.14d Schematically shows a light source according to some embodiments of the present disclosure Fig.14a Schematic diagram of the non-equidistant arrangement in the C-C', D-D' and E-E' directions.

[0029] Fig.14e The following schematically shows a brightness curve diagram corresponding to the non-equidistant arrangement of light sources according to some embodiments of the present disclosure.

[0030] Fig.15 A schematic diagram of a light source driving setting according to some embodiments of the present disclosure is schematically shown.

[0031] Fig.16 A schematic diagram of light source driving control according to some embodiments of the present disclosure is schematically shown.

[0032] Fig.17 The schematic diagram of the structure of the reflective film according to some embodiments of the present disclosure is schematically shown.

[0033] Fig.18a and Fig.18b Schematically illustrates a schematic diagram of the relative position relationship between a reflective lens and a first hole and a schematic diagram of the relative position relationship between a refractive lens and a second hole according to some embodiments of the present disclosure.

[0034] Fig.19 A schematic diagram of the local structure of a sub-light absorption point according to some embodiments of the present disclosure is schematically shown.

[0035] Fig. 20 A schematic diagram of the edge structure of a reflective film according to some embodiments of the present disclosure is schematically shown.

[0036] Fig.21 A partial structural diagram of a first through hole according to some embodiments of the present disclosure is schematically shown.

[0037] Fig. 22 A partial structural diagram of a reflective film according to some embodiments of the present disclosure is schematically shown.

[0038] Fig.23a and Figure 23b The structural diagram of the display module according to some embodiments of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0039] In the following description, for the purpose of explanation, many specific details are set forth to provide a comprehensive understanding of various exemplary embodiments. However, it is apparent that various exemplary embodiments may be implemented without these specific details or with one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, the specific shapes, configurations, and characteristics of an exemplary embodiment may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0040] In the accompanying drawings, the size and relative size of the elements may be exaggerated for the purpose of clarity and / or description. Thus, the size and relative size of the individual elements are not necessarily limited to the size and relative size shown in the drawings. When the exemplary embodiments may be implemented differently, the specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially simultaneously or in an order opposite to the described sequence. In addition, the same reference numerals represent the same elements.

[0041] When an element is described as being "on" another element, "connected to" another element, or "coupled to" another element, the element may be directly on, directly connected to, or directly coupled to another element, or there may be intermediate elements. However, when an element is described as being "directly on" another element, "directly connected to" another element, or "directly coupled to" another element, there are no intermediate elements. Other terms and / or expressions used to describe the relationship between elements should be interpreted in a similar manner, for example, "between" versus "directly between", "adjacent" versus "directly adjacent", or "on" versus "directly on", etc. In addition, the term "connected" may refer to a physical connection, an electrical connection, a communication connection, and / or a fluid connection.

[0042] It should be understood that, although the terms first, second, etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the exemplary embodiment, the first element may be named as the second element, and similarly, the second element may be named as the first element.

[0043] In the related art, since the overall thickness of the direct-type display device is relatively large, especially the thickness of the protruding part on the back is large, and the back shape is a two-step or multi-step design, the aesthetics is poor, the packaging cost is high, and the wall adhesion is poor. In addition, the direct-type display device is prone to problems such as uneven brightness, dark frames, bright edges, etc., and the image quality is poor, which affects the subjective visual effect. Therefore, in order to solve at least one aspect of the above technical problems, the embodiments of the present disclosure provide a backlight module, a display module, and a display device, which are conducive to achieving brightness and chromaticity consistency and realizing high image quality of the display device.

[0044] Figure 1 is a rear view of a display device according to some embodiments of the present disclosure. Figure 2 is a side view of a display device according to some embodiments of the present disclosure. Figure 3a and Figure 3b The display devices according to some embodiments of the present disclosure are respectively Figure 1 The cross-sectional view along the A-A' direction and Figure 1 Cross-sectional view along the BB' direction. Figure 4 is a schematic diagram of the structure of a display module according to some embodiments of the present disclosure.

[0045] Reference Figures 1 to 4, an embodiment of the present disclosure provides a display device, including a display module and a power board 300. The display module includes a backlight module 100 and a display panel 200, and the display panel 200 is located on the light-emitting surface of the backlight module 100. The backlight module 100 includes a first light mixing area A1, a second light mixing area A2, and at least one slope area A3 located between the first light mixing area A1 and the second light mixing area A2, and the light mixing distance D1 in the first light mixing area A1 is smaller than the light mixing distance D2 in the second light mixing area A2. The backlight module 100 also includes a back panel 101, a light source 102, a lens group 103, a reflective film 104, a diffuser plate 105, and a middle frame 106. The back plate 101 includes a first plate body 1011 located in the first light mixing area A1, a second plate body 1012 located in the second light mixing area A2, and a slope body 1013 located in the slope area A3. The first plate body 1011 and the second plate body 1012 are arranged in parallel, the top of the slope body 1013 is connected to the first plate body 1011, and the bottom of the slope body 1013 is connected to the second plate body 1012. The light source 102 includes a plurality of first point light sources 1021 located in the first light mixing area A1 and a plurality of second point light sources 1022 located in the second light mixing area A2. The lens group 103 includes a reflective lens 1031 located on the first point light source 1021 and a refractive lens 1032 located on the second point light source 1022. The reflective film 104 is located on the side of the back plate 101 close to the light source 102, and a plurality of avoidance holes 1041 are opened on the reflective film 104 to expose the light source 102 and the lens group 103. The diffusion plate 105 is located on a side of the lens group 103 away from the back plate 101, and the middle frame 106 is disposed around the back plate 101. The power supply board 300 is located on a side of the back plate 101 away from the display panel 200 in the first light mixing area A1.

[0046] It is understandable that if Figure 3a and Figure 4 As shown, in this embodiment, by setting two light mixing distances in a backlight module 100, the power board 300 can be placed in the first light mixing area A1 with a smaller light mixing distance. Figure 1 and Figure 2 It can be seen that the back structure of the entire display device becomes a plane, making the display device thinner and more beautiful. When the display device is a wall-mounted structure or embedded in a wall, the distance between the display device and the wall is shortened, and the packaging load capacity is increased, thereby reducing the packaging and transportation costs.

[0047] It should be noted that the light mixing distance refers to the distance from the light emitting surface of the light source 102 to the lower surface of the diffuser 105. Generally, the larger the light mixing distance, the more uniform the light mixing and the better the picture effect. In this embodiment, the first light mixing area A1 refers to the area where the light emitted by the plurality of first point light sources 1021 is mixed, the second light mixing area A2 refers to the area where the light emitted by the plurality of second point light sources 1022 is mixed, the slope area A3 corresponds to the area where the slope body 1013 is located, and the light mixing distance D1 in the first light mixing area A1 is smaller than the light mixing distance D2 in the second light mixing area A2, that is, the distance between the light source 102 and the diffuser 105 in the first light mixing area A1 is smaller than the distance between the light source 102 and the diffuser 105 in the second light mixing area A2.

[0048] It should be noted that the light source 102 is disposed on a lamp board, and the lamp board is disposed on a side of the back plate 101 close to the diffusion plate 105 .

[0049] It should be noted that the principle of the refractive lens 1032 is that the light emitted by the light source 102 is refracted after passing through the inner wall of the refractive lens 1032, and the angle of the outgoing light is deflected, thereby improving the viewing angle of the light source 102. The principle of the reflective lens 1031 is that the light emitted by the light source 102 with a smaller angle (0 to 45 degrees) is reflected once after passing through the inner wall of the reflective lens 1031, and this part of the reflected light is then incident on the reflective film 104 for secondary reflection, and finally emitted from the backlight module 100; while the light emitted by the light source 102 with a larger angle (45 to 90 degrees) is refracted after passing through the inner wall of the reflective lens 1031, and the angle of the outgoing light is deflected. Since the light with a smaller angle is reflected, the brightness directly above the light source 102 matched with the reflective lens 1031 decreases, and the angle of the outgoing light increases, so the viewing angle of the reflective lens 1031 is larger. Exemplarily, the viewing angles of the refractive lens 1032 and the reflective lens 1031 are 160 degrees and 170 degrees, respectively.

[0050] It is understandable that since the mixing distance D1 in the first mixing area A1 is small, if a combination of a refractive lens 1032 and a light source 102 is used, the angle of the emitted light is small, the mixing is uneven, and light shadows are easily produced; in addition, a portion of the emitted light using the reflective lens 1031 will be reflected back and forth in the backlight module 100, resulting in lower light output efficiency. In this embodiment, by using a reflective lens 1031 in the first light mixing area A1 with a small light mixing distance, since the viewing angle of the reflective lens 1031 is large, even if the light mixing distance D1 of the first light mixing area A1 is small, the light can be mixed evenly to avoid the generation of lamp shadows. Although the light extraction efficiency of the reflective lens 1031 will be reduced, since the light mixing distance D1 of the first light mixing area A1 is smaller than the light mixing distance D2 of the second light mixing area A2, the loss of reflected light energy will also be reduced accordingly; by using a refractive lens 1032 in the second light mixing area A2 with a large light mixing distance, although the viewing angle of the refractive lens 1032 is smaller than the viewing angle of the reflective lens 1031, since the light mixing distance D2 of the second light mixing area A2 is larger, the light can also be mixed evenly to avoid the generation of lamp shadows, and the light extraction efficiency of the refractive lens 1032 is basically not affected. Therefore, the solution of this embodiment can not only avoid the generation of lamp shadows, but also improve the light extraction efficiency of the light source 102.

[0051] In some embodiments, the light mixing distance adapted by the refractive lens 1032 is above 20 mm, and the light mixing distance adapted by the reflective lens 1031 is between 10 mm and 20 mm. In this embodiment, the difference in light mixing distance is adapted by using two lenses, and the power board 300 is placed at the step difference position, so that the back of the entire display device is a plane, which is thinner and more beautiful. In other embodiments, the refractive lens 1032 or the reflective lens 1031 can also be set in both the first light mixing area A1 and the second light mixing area A2.

[0052] In some embodiments of the present disclosure, Figure 3a As shown, in the light emitting direction of the display module, the sum of the thickness a1 of the power board 300, the distance a2 between the power board 300 and the first plate body 1011, and the distance a3 between the power board 300 and the extension line of the second plate body 1012 is the first sum D3; the difference between the mixing distance D2 in the second mixing area A2 and the mixing distance D1 in the first mixing area A1 is basically equal to the first sum D3.

[0053] It can be understood that the difference between the light mixing distance D2 in the second light mixing area A2 and the light mixing distance D1 in the first light mixing area A1 is the height difference between the first plate 1011 and the second plate 1012 of the back plate 101. Since there is a gap between the power board 300 and the back plate 101, and there may be process errors in the manufacturing process, within the range allowed by the process errors, the difference between the light mixing distance D2 in the second light mixing area A2 and the light mixing distance D1 in the first light mixing area A1 is substantially equal to the sum of the thickness a1 of the power board 300, the distance a2 between the power board 300 and the first plate 1011, and the distance a3 between the power board 300 and the extension line of the second plate 1012.

[0054] It is understandable that due to Figure 3b is a cross-sectional view in the first light mixing area A1, so Figure 3b There is no slope area A3 and the second light mixing area A2, and the power board 300 is located on a side of the first board 1011 away from the display panel 200.

[0055] Reference Figure 4 In some embodiments, the backlight module 100 further includes an optical film 107, and the display device further includes a front frame 108. The optical film 107 includes one or more of a diffusion film, a prism film, and a brightness enhancement film (DBEF); the front frame 108 includes electrogalvanized steel sheet (SECC), hot-dip galvanized steel sheet (SGCC), stainless steel (SUS304), plastic, etc.

[0056] In some embodiments, the material of the backplane 101 includes but is not limited to aluminum, electrogalvanized steel sheet (SECC), hot-dip galvanized steel sheet (SGCC), etc. The reflectivity of the reflective film 104 is greater than 90%, and the reflective film 104 may include a smooth reflective film without coated particles, or a reflective film with coated particles. The light source 102 includes but is not limited to millimeter-level light-emitting diodes (Mini-LEDs), such as light-emitting diodes of sizes such as 1515 (1.5mm*1.5mm), 1313 (1.3mm*1.3mm), or packaged light-emitting diodes, such as light-emitting diodes of sizes such as 3030 (3mm*3mm), 3528 (3.5mm*2.8mm), 7020 (7mm*2mm), and 4014 (4mm*1.4mm). The luminous color of the light source 102 includes but is not limited to blue light-emitting diodes and white light-emitting diodes. The middle frame 106 is used to support the display panel 200 and fix the optical film 107. The materials of the middle frame 106 include plastic, aluminum profiles, iron plates, etc. The diffusion plate 105 can be made of glass or plastic materials such as polystyrene (PS) and polycarbonate (PC). The display panel 200 includes an array substrate and a color film substrate, as well as upper and lower polarizers. The specific structure of the display panel 200 is similar to the conventional structure and is not described in detail here. It should be noted that the display module provided in this embodiment includes but is not limited to a liquid crystal display module and a Mini-LED display module.

[0057] Figure 5a to Figure 5e 1 are a back view and a cross-sectional view of a backlight module according to some embodiments of the present disclosure.

[0058] In some embodiments of the present disclosure, referring to Figure 5a , where the left side shows the back view of the backlight module, and the right side shows the cross-sectional view of the backlight module, and the second light mixing area A2 is located on one side of the first light mixing area A1. Specifically, the second light mixing area A2 is located on the lower side of the first light mixing area A1. Since the light mixing distance of the first light mixing area A1 is small, there is a step difference in the upper part of the backlight module, and the power board 300 can be placed in the step difference space of the upper part.

[0059] In some embodiments of the present disclosure, referring to Figure 5b , where the left side shows the back view of the backlight module, and the right side shows the cross-sectional view of the backlight module, and the second light mixing area A2 is located on the opposite sides of the first light mixing area A1. Specifically, the second light mixing area A2 is located on the upper and lower sides of the first light mixing area A1. Since the light mixing distance of the first light mixing area A1 is small, there is a step difference in the middle part of the backlight module, and the power board 300 can be placed in the step difference space in the middle part.

[0060] In some embodiments of the present disclosure, referring to Figure 5c, where the left side shows the back view of the backlight module, and the right side shows the cross-sectional view of the backlight module, and the second light mixing area A2 is located on the adjacent two sides of the first light mixing area A1. Specifically, the second light mixing area A2 is located on the left and lower side of the first light mixing area A1. Since the light mixing distance of the first light mixing area A1 is small, there is a step difference in the upper right part of the backlight module, and the power board 300 can be placed in the step difference space of the upper right part.

[0061] In some embodiments of the present disclosure, referring to Figure 5d , where the left side shows the back view of the backlight module, and the right side shows the cross-sectional view of the backlight module, and the second light mixing area A2 is located on three adjacent sides of the first light mixing area A1. Specifically, the second light mixing area A2 is located on the left, right and bottom sides of the first light mixing area A1. Since the light mixing distance of the first light mixing area A1 is small, there is a step difference in the middle area of ​​the upper part of the backlight module, and the power board 300 can be placed in the step difference space in the middle area of ​​the upper part.

[0062] In some embodiments of the present disclosure, referring to Figure 5e , where the left side shows the back view of the backlight module, and the right side shows the cross-sectional view of the backlight module, and the second light mixing area A2 is arranged around the first light mixing area A1. Since the light mixing distance of the first light mixing area A1 is small, there is a step difference in the middle area of ​​the backlight module, and the power board 300 can be placed in the step difference space in the middle area of ​​the backlight module.

[0063] Specifically, when the second light mixing area A2 is located at one side of the first light mixing area A1, for example Figure 5a As shown, the backlight module 100 includes only one slope area A3. When the second light mixing area A2 is located on two opposite sides or adjacent sides of the first light mixing area A1, for example Figure 5b or Figure 5c As shown, the backlight module 100 includes two slope areas A3. When the second light mixing area A2 is located on three adjacent sides of the first light mixing area A1, for example Figure 5d As shown, the backlight module 100 includes three slope areas A3. When the second light mixing area A2 is arranged around the first light mixing area A1, for example Figure 5e As shown, the backlight module 100 includes four slope areas A3.

[0064] Figure 6a This is a light path diagram in which the slope body 1013 is in the shape of a convex arc surface according to some embodiments of the present disclosure. Figure 6b 1 is a brightness curve diagram corresponding to a convex arc shape of the slope body 1013 according to some embodiments of the present disclosure. Figure 7a 1 is a light path diagram in which the slope body 1013 is a concave arc shape according to some embodiments of the present disclosure. Figure 7b 1 is a brightness curve diagram corresponding to a concave arc shape of the slope body 1013 according to some embodiments of the present disclosure. Figure 8aThis is a light path diagram in which the slope body 1013 is a section of a plane shape according to some embodiments of the present disclosure. Figure 8b This is a brightness curve diagram corresponding to a plane shape of the slope body 1013 according to some embodiments of the present disclosure. Fig. 9 This is a light path diagram in which the slope body 1013 is in the shape of two plane sections according to some embodiments of the present disclosure.

[0065] Reference Figure 6a , Figure 7a , Figure 8a as well as Fig. 9 In some embodiments of the present disclosure, the surface of the slope body 1013 on one side close to the diffuser 105 is any one of a concave arc surface, a convex arc surface, and at least one flat surface. Figure 6a , Figure 7a , Figure 8a It can be seen that when the surface of the slope body 1013 on one side close to the diffuser 105 is a flat surface, the reflected light is more uniform, the same as the incident light distribution, and no light aggregation or divergence occurs, making the picture brightness more uniform. When the surface of the slope body 1013 on one side close to the diffuser 105 is a concave arc or a convex arc, the reflected light will move away from the upper end of the slope body 1013, making the light at the upper end of the slope body 1013 less, while the light in the area close to the slope body 1013 increases, resulting in uneven picture brightness. Fig. 9 It can be seen that when the surface of the slope body 1013 on one side close to the diffuser 105 is a multi-segment plane, the direction of light reflection is inconsistent on the slope body 1013 at different positions, and the light irradiated to the bottom of the slope body 1013 will be reflected to a position far away from the slope body 1013, resulting in insufficient light in the slope area A3 and uneven brightness of the picture.

[0066] Further, refer to Figure 6b , Figure 7b , Figure 8b , where the horizontal axis represents the distance from the middle area of ​​the picture, -100 represents the edge, the closer to the middle area the further to the right, and the vertical axis represents the relative brightness. It can be seen from the brightness curve that the peripheral light intensity is more uniform when the slope body 1013 is a section of a plane shape, that is, the peripheral image quality is more uniform, while the peripheral light intensity is uneven when the slope body 1013 is a convex arc shape or a concave arc shape, that is, the peripheral image quality is uneven, so the edge dark frame effect of the slope body 1013 being a section of a plane shape is better than that of the slope body 1013 being a convex arc shape or a concave arc shape. Therefore, the surface of the side of the slope body 1013 close to the diffuser 105 is preferably a section of a plane.

[0067] Fig.10a 1 is a schematic diagram showing that the angle b1 between the slope body 1013 and the second plate body 1012 is 140 degrees according to some embodiments of the present disclosure. Fig.10b1 is a brightness curve diagram corresponding to an angle b1 between the slope body 1013 and the second plate body 1012 of 140 degrees according to some embodiments of the present disclosure. Fig.11a is a schematic diagram showing that the angle b2 between the slope body 1013 and the second plate body 1012 is 120 degrees according to some embodiments of the present disclosure. Fig.11b 1 is a brightness curve diagram corresponding to an angle b2 between the slope body 1013 and the second plate body 1012 of 120 degrees according to some embodiments of the present disclosure. Fig.12a 1 is a schematic diagram showing that the angle b3 between the slope body 1013 and the second plate body 1012 is 100 degrees according to some embodiments of the present disclosure. Figure 12b 1 is a brightness curve diagram corresponding to a case where the included angle b3 between the slope body 1013 and the second plate body 1012 is 100 degrees according to some embodiments of the present disclosure.

[0068] Combination Fig.10b , Fig.11b , Figure 12b It can be seen that the smaller the angle between the slope body 1013 and the second plate body 1012 is, the better the edge dark frame effect is.

[0069] In some embodiments of the present disclosure, the surface of one side of the slope body 1013 close to the diffuser plate 105 is a plane, and the angle between the slope body 1013 and the second plate body 1012 is greater than or equal to 90 degrees and less than or equal to 135 degrees. Specifically, if the back plate 101 is formed by stamping with a metal mold, the large slope angle (complementary to the angle between the slope body 1013 and the second plate body 1012) will make the back plate 101 difficult to form, which is not conducive to mass production. In combination with the product molding process, it is preferred that the slope angle range is greater than or equal to 45 degrees and less than or equal to 70 degrees, that is, the angle between the slope body 1013 and the second plate body 1012 is greater than or equal to 110 degrees and less than or equal to 135 degrees. If the back panel 101 is formed by a metal non-stamping method (such as aluminum extrusion molding), or by injection molding of a plastic material, that is, the slope angle is not affected by the molding method, the slope angle range is preferably greater than or equal to 70 degrees and less than or equal to 90 degrees, that is, the angle between the slope body 1013 and the second plate body 1012 is greater than or equal to 90 degrees and less than or equal to 110 degrees. Therefore, the angle between the slope body 1013 and the second plate body 1012 is greater than or equal to 90 degrees and less than or equal to 135 degrees, for example, the angle between the slope body 1013 and the second plate body 1012 is any value of 90 degrees, 100 degrees, 110 degrees, 120 degrees, and 135 degrees.

[0070] Fig.13 It is a brightness curve diagram corresponding to the equally spaced arrangement of the light sources 102 according to some embodiments of the present disclosure. Fig.14a is a schematic diagram of the arrangement of light source arrays according to some embodiments of the present disclosure. Fig.14b , Fig.14c and Fig.14d The light source 102 according to some embodiments of the present disclosure is respectively Fig.14a Schematic diagram of the non-equidistant arrangement in the C-C', D-D' and E-E' directions. Fig.14e 1 is a brightness curve diagram corresponding to the non-equidistant arrangement of the light sources 102 according to some embodiments of the present disclosure.

[0071] In some embodiments of the present disclosure, referring to Figure 4 , the spacing between two adjacent first point light sources 1021, the spacing between two adjacent second point light sources 1022, and the spacing between an adjacent first point light source 1021 and a second point light source 1022 are all equal, that is, the light sources 102 are arranged at equal intervals.

[0072] Combination Figure 4 and Fig.13 It can be seen that since the non-edge area of ​​the backlight module 100 is emitted by multiple light sources 102, the brightness is higher; while the light in the edge area is only emitted by the light source 102 at the edge, the brightness is lower than that of the non-edge area, causing the edge position to be dark. In addition, at a position close to the slope area A3, since the light emitted by the second point light source 1022 closest to the slope area A3 is irradiated to the slope body 1013 and then reflected to the area far away from the slope area A3, the brightness of the picture in the slope area A3 is lower than that in the non-edge area, causing the slope area A3 to be dark.

[0073] In some embodiments of the present disclosure, the angle between the middle frame 106 and the first plate 1011 or the second plate 1012 is greater than or equal to 90 degrees and less than 180 degrees, that is, the inner side surface of the middle frame 106 is also a slope surface, and the light emitted by the light source 102 in the edge area is irradiated to the middle frame 106 and then reflected to the area away from the middle frame 106. Figure 5e As shown, the first light mixing area A1 is located in the middle area of ​​the picture, and the second light mixing area A2 is arranged around the first light mixing area A1). The light emitted by the first point light source 1021 in the first light mixing area A1 is not affected by the middle frame 106 and the slope body 1013. Therefore, multiple first point light sources 1021 are evenly distributed, so that the brightness in the first light mixing area A1 is uniform.

[0074] When the middle frame 106 overlaps with the first light mixing area A1 (eg Figure 5a to Figure 5dAs shown), the first light mixing area A1 includes a first edge area A11 and a first middle area A12 located between the first edge area A11 and the slope area A3, the middle frame 106 overlaps with the first edge area A11, and the distribution density of the first point light sources 1021 located in the first edge area A11 is greater than the distribution density of the first point light sources 1021 located in the first middle area A12. By setting the distribution density of the first point light sources 1021 located in the first edge area A11 to be greater than the distribution density of the first point light sources 1021 located in the first middle area A12, the darkening phenomenon of the first edge area A11 can be improved.

[0075] like Figure 5a to Figure 5e As shown, the second light mixing area A2 includes a second edge area A21, a third edge area A22 and a second middle area A23 located between the second edge area A21 and the third edge area A22, the middle frame 106 overlaps with the second edge area A21, the slope area A3 overlaps with the third edge area A22, the distribution density of the second point light sources 1022 in the second edge area A21 and the distribution density of the second point light sources 1022 in the third edge area A22 are both greater than the distribution density of the second point light sources 1022 in the second middle area A23, and by setting the distribution density of the second point light sources 1022 in the second edge area A21 and the distribution density of the second point light sources 1022 in the third edge area A22 to be greater than the distribution density of the second point light sources 1022 in the second middle area A23, the darkening phenomenon of the second edge area A21 and the third edge area A22 can be improved.

[0076] Reference Figures 14a to 14d In some embodiments of the present disclosure, the backlight module 100 includes a light source setting area Z1 corresponding to the display area of ​​the display panel 200, and the light sources 102 are arranged in an array in the light source setting area Z1. Fig.14b Specifically, the display module Fig.14a The schematic diagram of the arrangement of the light source 102 in the cross-sectional view along the C-C' direction, wherein there are n rows of first point light sources 1021 and m rows of second point light sources 1022, d1 is the minimum distance between the first row of first point light sources 1021 and the edge of the light source setting area Z1, d2 is the minimum distance between the second row of first point light sources 1021 and the first row of first point light sources 1021, and so on to dn. c1 is the minimum distance between the first row of second point light sources 1022 and the edge of the light source setting area Z1, c2 is the minimum distance between the second row of second point light sources 1022 and the first row of second point light sources 1022, and so on to cm. c(m+1) is the minimum distance between the m-th row of second point light sources 1022 and the top of the slope body 1013, and d(n+1) is the minimum distance between the n-th row of first point light sources 1021 and the m-th row of second point light sources 1022.

[0077] Fig.14cSpecifically, it is a schematic diagram of the arrangement of the light sources 102 in the cross-sectional view of the display module along the Fig.14a D-D' direction in Fig.14a . The first point light source 1021 has (2s - 2) columns. d1 is the minimum distance between the first point light source 1021 in the first column and the edge of the light source setting area Z1. d2 is the minimum distance between the first point light source 1021 in the second column and the first point light source 1021 in the first column, and so on to ds.

[0078] Fig.14d Specifically, it is a schematic diagram of the arrangement of the light sources 102 in the cross-sectional view of the display module along the Fig.14a E-E' direction in Fig.14a . The second point light source 1022 has (2w - 2) columns. c1 is the minimum distance between the first point light source 1022 in the first column and the edge of the light source setting area Z1. c2 is the minimum distance between the first point light source 1022 in the second column and the first point light source 1022 in the first column, and so on to cw. Herein, m, n, s, and w are all positive integers. In some embodiments, c1 can be greater than d1, and s can be greater than w.

[0079] In some embodiments of the present disclosure, the minimum distance between the first point light source 1021 in the first row close to the middle frame 106 and the edge of the light source setting area Z1, and the minimum distance between the first point light source 1021 in the first column close to the middle frame 106 and the edge of the light source setting area Z1 is the first value d1; the minimum distance between the first point light source 1021 in the second row close to the middle frame 106 and the first point light source 1021 in the first row close to the middle frame 106, and the minimum distance between the first point light source 1021 in the second column close to the middle frame 106 and the first point light source 1021 in the first column close to the middle frame 106 is the second value d2; the point light sources located between the first point light source 1021 in the second row close to the middle frame 106 and the first point light source 1022 in the first row close to the ramp area A3, and located between the two first point light sources 1021 in the second column close to the middle frame 106 are equally spaced, and the equally spaced distance is the third value d3; the first value is less than the second value, and the second value is less than or equal to the third value, that is, d1 < d2 ≤ d3.

[0080] It can be understood that in this embodiment, by making d1 < d2 ≤ d3, that is, the spacing of the first point light sources 1021 near the edge is smaller, the brightness of the edge area can be increased, and the phenomenon of darkening at the edge can be improved.

[0081] In some embodiments of the present disclosure, the minimum distance between the second point light source 1022 of the first row near the middle frame 106 and the edge of the light source setting area Z1, and the minimum distance between the second point light source 1022 of the first column near the middle frame 106 and the edge of the light source setting area Z1 are the fourth value c1; the minimum distance between the second point light source 1022 of the second row near the middle frame 106 and the second point light source 1022 of the first row near the middle frame 106, and the minimum distance between the second point light source 1022 of the second column near the middle frame 106 and the second point light source 1022 of the first column near the middle frame 106 are the fifth value c2; the distance between the orthographic projection of the second point light source 1022 of the first row near the ramp area A3 on the diffusion plate 105 and the orthographic projection of the top of the ramp body 1013 on the diffusion plate 105 is the seventh value c(m + 1); the distance between the second point light source 1022 of the second row near the ramp area A3 and the second point light source 1022 of the first row near the ramp area A3 is the eighth value cm; the point light sources located between the second point light source 1022 of the second row near the ramp area A3 and the second point light source 1022 of the second row near the middle frame 106, and between the two second point light sources 1022 of the second column near the middle frame 106 are equally spaced, and the equally spaced distance is the sixth value c3 = c(m - 1); the fourth value is less than the fifth value, and the fifth value is less than or equal to the sixth value, that is, c1 < c2 ≤ c3; the seventh value is less than the eighth value, and the eighth value is less than or equal to the sixth value, that is, c(m + 1) < cm ≤ c(m - 1).

[0082] It can be understood that in this embodiment, by making c1 < c2 ≤ c3 and c(m + 1) < cm ≤ c(m - 1), that is, the spacing between the second point light sources 1022 near the edge area and near the ramp area A3 is smaller, the brightness of the edge area and the ramp area A3 can be increased, and the phenomenon of darkening in the edge area and the ramp area A3 can be improved.

[0083] Comparison Fig.13 and Fig.14e It can also be seen that when the light sources 102 are equally spaced, a dark area will be formed at the edge of the picture. When the light sources 102 are not equally spaced, the dark area of the picture can be eliminated, making the light transition of the edge picture of the display device more uniform and improving the edge picture quality.

[0084] In some embodiments of the present disclosure, the ratio of the first value d1 to the second value d2 is greater than or equal to 1 / 2 and less than or equal to 2 / 3; the ratio of the fourth value c1 to the fifth value c2 is greater than or equal to 1 / 2 and less than or equal to 2 / 3; the ratio of the seventh value c(m + 1) to the eighth value cm is greater than or equal to 1 / 2 and less than or equal to 2 / 3.

[0085] It should be noted that the arrangement spacing of the first point light sources 1021 in the first mixing light area A1 is set to d1 < d2 ≤ d3 = d4 =... = dn = d(n + 1), d1 < d2 ≤ d3 = d4 =... = ds, and the best effect is achieved when d1 = (1 / 2 to 2 / 3)*d2. The arrangement spacing of the second point light sources 1022 in the second mixing light area A2 is set to c1 < c2 ≤ c3 = c4 =... = c(m - 1), c1 < c2 ≤ c3 = c4 =... = cW, and the best effect is achieved when c1 = (1 / 2 to 2 / 3)*c2; at a position close to the slope area A3, the arrangement spacing of the second point light sources 1022 is set to c(m + 1) < cm ≤ c(m - 1), and the best effect is achieved when c(m + 1) = (1 / 2 to 2 / 3)*cm.

[0086] Continue to refer to Fig.14b , in some embodiments of the present disclosure, the distance between the orthographic projection of the first row of the first point light sources 1021 on the diffusion plate 105 close to the slope area A3 and the orthographic projection of the bottom of the slope body 1013 on the diffusion plate 105 is the ninth value dv; the seventh value c(m + 1) is greater than or equal to the ninth value dv.

[0087] It should be noted that in practical applications, the distance between two adjacent second point light sources 1022 is greater than or equal to the distance between two adjacent first point light sources 1021. In this embodiment, by making the seventh value c(m + 1) greater than or equal to the ninth value dv, the overall brightness of the light source 102 can be made more uniform.

[0088] Fig.15 is a schematic diagram of the driving setting of the light source 102 according to some embodiments of the present disclosure. Fig.16 is a schematic diagram of the driving control of the light source 102 according to some embodiments of the present disclosure.

[0089] Refer to Fig.16 , in some embodiments, the light source 102 is driven by the power supply board 300. Specifically, multiple light sources 102 in the same row form a light bar, and the power supply board 300 can drive each light bar separately.

[0090] In some embodiments of the present disclosure, the angle between the middle frame 106 and the first plate body 1011 or the second plate body 1012 is greater than or equal to 90 degrees and less than 180 degrees, that is, the inner side surface of the middle frame 106 is also a slope surface, and the light emitted by the light source 102 in the edge area will be reflected after irradiating on the middle frame 106. When the middle frame 106 has no overlap with the first mixing light area A1 (such as Figure 5eAs shown, the first light mixing area A1 is located in the middle area of ​​the picture, and the second light mixing area A2 is arranged around the first light mixing area A1). The light emitted by the first point light source 1021 in the first light mixing area A1 is not affected by the middle frame 106 and the slope body 1013. Therefore, the driving power of the light strips where the multiple first point light sources 1021 are located is equal, so that the brightness in the first light mixing area A1 is uniform.

[0091] Reference Fig.15 , Figure 5a to Figure 5d , when the middle frame 106 overlaps with the first light mixing area A1, the first light mixing area A1 includes a first edge area A11 and a first middle area A12 located between the first edge area A11 and the slope area A3, the middle frame 106 overlaps with the first edge area A11, and the driving power of the first point light source 1021 located in the first edge area A11 is less than the driving power of the first point light source 1021 located in the first middle area A12. By setting the driving power of the first point light source 1021 located in the first edge area A11 to be less than the driving power of the first point light source 1021 located in the first middle area A12, the phenomenon of edge brightness due to enhanced reflection of the inner side of the middle frame 106 can be improved.

[0092] Reference Fig.15 , Figure 5a to Figure 5e The second light mixing area A2 includes a second edge area A21, a third edge area A22 and a second middle area A23 located between the second edge area A21 and the third edge area A22. The middle frame 106 overlaps with the second edge area A21, and the slope area A3 overlaps with the third edge area A22. The driving power of the second point light source 1022 in the second edge area A21 and the driving power of the second point light source 1022 in the third edge area A22 are both less than the driving power of the second point light source 1022 in the second middle area A23. By setting the driving power of the second point light source 1022 in the second edge area A21 and the driving power of the second point light source 1022 in the third edge area A22 to be both less than the driving power of the second point light source 1022 in the second middle area A23, the phenomenon that the picture is bright due to the reflection of the inner side of the middle frame 106 in the second edge area A21 and the reflection of the surface of the slope body 1013 in the third edge area A22 can be improved.

[0093] Reference Figures 14a to 14d as well as Fig.15In some embodiments of the present disclosure, the backlight module 100 includes a light source setting area Z1 corresponding to the display area of ​​the display panel 200, and the light sources 102 are arranged in an array in the light source setting area Z1; the driving power of the first point light sources 1021 in the first row close to the middle frame 106 is the first power P1; the driving power of the first point light sources 1021 in the second row close to the middle frame 106 is the second power P2; the driving power of the first point light sources 1021 located between the first point light sources 1021 in the second row close to the middle frame 106 and the slope area A3 is the third power P3 (i.e., the rated power of the first point light source 1021); the first power P1 is less than or equal to the second power P2, the second power P2 is less than or equal to the rated power of the first point light source 1021, and the first power P1 is less than the rated power of the first point light source 1021.

[0094] It can be understood that, in this embodiment, by making the first power P1 less than or equal to the second power P2, the second power P2 less than or equal to the third power P3, and the first power P1 less than the third power P3, that is, the driving power of the first point light source 1021 close to the middle frame 106 is smaller, the luminous brightness of the first point light source 1021 close to the middle frame 106 can be reduced, thereby improving the phenomenon that the picture is bright due to the enhanced reflection on the inner side of the middle frame 106.

[0095] In some embodiments of the present disclosure, the driving power of the first row of second point light sources 1022 near the middle frame 106 is the fourth power P4; the driving power of the second row of second point light sources 1022 near the middle frame 106 is the fifth power P5; the driving power of the first row of second point light sources 1022 near the slope area A3 is the fourth power P4; the driving power of the second row of second point light sources 1022 near the slope area A3 is the fifth power P5; the driving power of the second point light sources 1022 located between the second row of second point light sources 1022 near the slope area A3 and the second row of second point light sources 1022 near the middle frame 106 is both the sixth power P6 (i.e., the rated power of the second point light source 1022); the fourth power P4 is less than or equal to the fifth power P5, the fifth power P5 is less than or equal to the rated power of the second point light source 1022, and the fourth power P4 is less than the rated power of the second point light source 1022.

[0096] It can be understood that, in this embodiment, by making the fourth power P4 less than or equal to the fifth power P5, the fifth power P5 less than or equal to the sixth power P6, and the fourth power P4 less than the sixth power P6, that is, the driving power of the second point light source 1022 near the middle frame 106 and near the slope area A3 is smaller, the brightness of the second point light source 1022 near the middle frame 106 and near the slope body 1013 can be reduced, and the phenomenon of the picture being bright due to the enhanced reflection on the inner side of the middle frame 106 and the surface of the slope body 1013 can be improved.

[0097] In some embodiments of the present disclosure, the ratio of the first power P1 to the rated power of the first point light source 1021 is greater than or equal to 0.94 and less than or equal to 0.97; the ratio of the second power P2 to the rated power of the first point light source 1021 is greater than or equal to 0.97 and less than or equal to 1; the ratio of the fourth power P4 to the rated power of the second point light source 1022 is greater than or equal to 0.94 and less than or equal to 0.97; the ratio of the fifth power P5 to the rated power of the second point light source 1022 is greater than or equal to 0.97 and less than or equal to 1. The embodiments of the present disclosure are not limited to this, and the specific power values ​​can be adjusted and set according to the initial uniformity of the picture.

[0098] In some embodiments of the present disclosure, the ratio of the brightness of the first point light source 1021 to the brightness of the second point light source 1022 is a first ratio; the ratio of the brightness at the first mixed light distance to the brightness at the second mixed light distance is a second ratio; the ratio of the reflected brightness to the refracted brightness is a third ratio; the ratio of the rated power of the second point light source 1022 to the rated power of the first point light source 1021 is equal to the product of the first ratio, the second ratio and the third ratio.

[0099] It is understandable that the power of the light source 102 is inversely proportional to the brightness of the light source 102, that is, the greater the brightness of the light source 102, the brighter the picture, and the corresponding driving power can be set to be smaller to improve the brightness uniformity of the picture. In this embodiment, the ratio of the rated power of the second point light source 1022 to the rated power of the first point light source 1021 (sixth power P6 / third power P3) = brightness of the first point light source 1021*M*N / brightness of the second point light source 1022.

[0100] The brightness of the first point light source 1021 refers to the luminous intensity of a single first point light source 1021 located in the first light mixing area A1, and the brightness of the second point light source 1022 refers to the luminous intensity of a single second point light source 1022 located in the second light mixing area A2.

[0101] Wherein, M is the light mixing distance difference coefficient, M=first light mixing distance brightness / second light mixing distance brightness. For example, the first light mixing distance brightness refers to the brightness of the light emitted by the first point light source 1021 measured at the light mixing distance of the first light mixing area A1, and the second light mixing distance brightness refers to the brightness of the light emitted by the first point light source 1021 measured at the light mixing distance of the second light mixing area A2. For another example, the first light mixing distance brightness refers to the brightness of the light emitted by the first point light source 1021 measured at the light mixing distance of the first light mixing area A1 after passing through the reflective lens 1031, and the second light mixing distance brightness refers to the brightness of the light emitted by the same first point light source 1021 measured at the light mixing distance of the second light mixing area A2 after passing through the same reflective lens 1031. In other words, the first light mixing distance brightness and the second light mixing distance brightness represent: the brightness measured at two different light mixing distances when only the single factor of the light mixing distance is different and other factors are the same.

[0102] Wherein, N is the lens difference coefficient, N=reflection brightness / refraction brightness. For example, the reflection brightness refers to the brightness measured after the light emitted by the first point light source 1021 passes through the reflective lens 1031, and the refraction brightness refers to the brightness measured after the light emitted by the same first point light source 1021 passes through the refractive lens 1032. For another example, the reflection brightness refers to the brightness measured at the mixing distance of the first light mixing area A1 after the light emitted by the first point light source 1021 passes through the reflective lens 1031, and the refraction brightness refers to the brightness measured at the mixing distance of the first light mixing area A1 after the light emitted by the same first point light source 1021 passes through the refractive lens 1032. In other words, the reflection brightness and the refraction brightness represent: the brightness measured on two different lenses when only the single factor of the lens is different and other factors are the same. In some embodiments of the present disclosure, the third ratio is greater than or equal to 5 / 6 and less than or equal to 10 / 11.

[0103] It can be understood that this embodiment can improve the display screen brightness differences caused by the brightness differences of the light source 102, the mixing distance differences and the lens differences by making the ratio of the sixth power to the third power equal to the product of the first ratio, the second ratio and the third ratio.

[0104] Reference Fig.16 In some embodiments of the present disclosure, the number of light strips is n+m, and n+m light source driving modules 302 are also provided on the power board 300, which respectively control the 1st to n+mth light strips.

[0105] In some embodiments of the present disclosure, the light source 102 is in a local dimming mode, the power board 300 is powered on, and each light source driving module 302 is initialized and configured through the code stored in the central processing unit 301 (MCU), and the specific power configuration value is set according to the aforementioned driving power ratio. In addition, during use, the MCU can receive the local dimming data in real time, and adjust the light bar power accordingly according to the brightness of the display screen to reduce the overall power consumption.

[0106] In some embodiments of the present disclosure, the light source 102 is in a non-local dimming mode (no Local dimming mode). When the power board 300 is powered on, the light source driving module 302 can directly control the output light bar supply voltage through the boost circuit, and configure the output current value through the resistor (Iset resistor) in the boost circuit. The specific power configuration value is set according to the aforementioned driving power ratio.

[0107] In some embodiments of the present disclosure, the ratio of the number of first point light sources 1021 to the number of second point light sources 1022 is greater than or equal to 0.5 and less than or equal to 3, for example, the ratio of the number of first point light sources 1021 to the number of second point light sources 1022 is any value of 0.5, 1, 2, 2.5, and 3. Or the ratio of the distribution density of the first point light sources 1022 to the distribution density of the second point light sources 1022 is greater than or equal to 0.5 and less than or equal to 1.5, for example, the ratio of the distribution density of the first point light sources 1021 to the distribution density of the second point light sources 1022 is any value of 0.5, 0.75, 1, 1.25, and 1.5.

[0108] In some embodiments of the present disclosure, the distance between two adjacent first point light sources 1021 is greater than or equal to 40 mm and less than or equal to 100 mm, for example, the distance between two adjacent first point light sources 1021 is any value of 40 mm, 60 mm, 80 mm, 90 mm, and 100 mm. The distance between two adjacent second point light sources 1022 is greater than or equal to 50 mm and less than or equal to 120 mm, for example, the distance between two adjacent second point light sources 1022 is any value of 50 mm, 70 mm, 90 mm, 110 mm, and 120 mm. It can be understood that the distribution density of the first point light source 1021 can be determined according to the distance between the two adjacent first point light sources 1021; the distribution density of the second point light source 1022 can be determined according to the distance between the two adjacent second point light sources 1022. The number of the first point light source 1021 and the second point light source 1022 can be determined according to the display area size of the display module, the distribution density of the first point light source 1021, and the distribution density of the second point light source 1022.

[0109] Fig.17is a schematic structural diagram of the reflective film 104 according to some embodiments of the present disclosure. Fig.18a and Fig.18b They are respectively a schematic diagram of the relative position relationship between the reflective lens 1031 and the first hole 141 and a schematic diagram of the relative position relationship between the refractive lens 1032 and the second hole 142 according to some embodiments of the present disclosure. Fig.19 is a schematic diagram of a partial structure of a sub-light absorption point 1042 according to some embodiments of the present disclosure. Fig. 20 is a schematic diagram of the edge structure of the reflective film 104 according to some embodiments of the present disclosure. Fig.21 is a schematic diagram of a partial structure of the first through hole 1043 according to some embodiments of the present disclosure. Fig. 22 is a schematic diagram of a partial structure of the reflective film 104 according to some embodiments of the present disclosure.

[0110] Reference Fig.17 , Fig.18a and Fig.18b In some embodiments of the present disclosure, the plurality of avoidance holes 1041 are divided into a first hole 141 and a second hole 142. The first hole 141 is located in the first light mixing area A1, and the first hole 141 is used to reveal the first point light source 1021 and the reflective lens 1031. The second hole 142 is located in the second light mixing area A2, and the second hole 142 is used to reveal the second point light source 1022 and the refractive lens 1032. The orthographic projection of the reflective lens 1031 on the back plate 101 partially overlaps with the orthographic projection of the first hole 141 on the back plate 101. The orthographic projection of the refractive lens 1032 on the back plate 101 is located within the orthographic projection of the second hole 142 on the back plate 101.

[0111] It can be understood that, since the reflective lens 1031 has a high requirement on the flatness of the reflective film 104, the reflective film 104 can be engaged with the reflective lens 1031 in this embodiment by making the orthographic projection of the reflective lens 1031 on the back plate 101 overlap with the orthographic projection of the first hole 141 on the back plate 101. Specifically, in some embodiments of the present disclosure, the portion of the reflective film 104 that overlaps with the orthographic projection area of ​​the reflective lens 1031 on the reflective film 104 is located between the reflective lens 1031 and the back plate 101. Since there is a gap between the base of the reflective lens 1031 and the back plate 101, the portion of the reflective film 104 that overlaps with the orthographic projection area of ​​the reflective lens 1031 on the reflective film 104 is pressed between the base and the back plate 101, thereby achieving the engagement of the reflective film 104 with the reflective lens 1031, which can improve the flatness of the reflective film 104 and prevent the reflective film 104 from partially warping.

[0112] In some embodiments of the present disclosure, the shape of the orthographic projection of the reflective lens 1031 on the back plate 101 is a square, the width L1 of the first hole 141 in the first direction X is greater than the side length L3 of the square, the width L2 of the first hole 141 in the second direction Y is less than the side length L3 of the square, and the first direction X is perpendicular to the second direction Y; the shape of the orthographic projection of the refractive lens 1032 on the back plate 101 is a circle, and the diameter L4 of the second hole 142 is greater than the diameter L5 of the circle.

[0113] In some embodiments of the present disclosure, the difference between the width L1 of the first hole 141 in the first direction X and the side length L3 of the square is greater than or equal to 0.5 mm and less than or equal to 1.5 mm, for example, any value of 0.5 mm, 0.7 mm, 0.9 mm, 1.1 mm, and 1.5 mm; the difference between the side length L3 of the square and the width L2 of the first hole 141 in the second direction Y is greater than or equal to 0.5 mm and less than or equal to 1 mm, for example, any value of 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, and 1 mm; the difference between the diameter L4 of the second hole 142 and the diameter L5 of the circle is greater than or equal to 0.5 mm and less than or equal to 1.5 mm, for example, any value of 0.5 mm, 0.7 mm, 0.9 mm, 1.1 mm, and 1.5 mm.

[0114] Reference Fig.17 , Fig.19 and Fig. 20 In some embodiments of the present disclosure, the backlight module further includes a dotted line 1044, which is located on the reflective film 104 at the boundary between the first light mixing area A1 and the slope area A3, and / or the dotted line 1044 is located on the reflective film 104 at the boundary between the second light mixing area A2 and the slope area A3. Fig. 22 When the number of the slope areas A3 is greater than 1, a dotted line 1044 is also provided on the reflective film 104 located at the boundary line between two adjacent slope areas A3.

[0115] It can be understood that in this embodiment, by setting point breaks 1044 on the reflective film 104 at the boundary line between the first light mixing area A1 and the slope area A3, at the boundary line between the second light mixing area A2 and the slope area A3, and at the boundary line between two adjacent slope areas A3, it is possible to prevent the reflective film 104 from bulging when it is folded.

[0116] In some embodiments of the present disclosure, the backlight module further includes a plurality of extinction structures 42 , which are located on a side of the reflective film 104 in the slope area A3 close to the diffuser 105 or on the reflective film 104 in the slope area A3 .

[0117] In some embodiments of the present disclosure, the extinction structure 42 includes a sub-light absorption point 1042, which is located on a side surface of the reflective film 104 in the slope area A3 close to the diffuser 105; or, the extinction structure 42 includes a first through hole 1043, which is located on the reflective film 104 in the slope area A3.

[0118] It is understandable that the light emitted by the second point light source 1022 enters the slope area A3 after passing through the refractive lens 1032, forming a bright area, which affects the brightness uniformity of the picture. In this embodiment, by setting a sub-light absorption point 1042 or a first through hole 1043 on the reflective film 104 of the slope area A3 to reduce the reflected light of the slope area A3, the brightness of the bright area is reduced, and the phenomenon of the slope area A3 being bright can be improved.

[0119] In some embodiments of the present disclosure, the material of the matte structure 42 includes black ink and / or white ink, and the ratio of the amount of white ink to the amount of black ink is greater than or equal to 0 and less than or equal to 50.

[0120] It is understandable that the matte structure 42 may be a light-absorbing ink. Since the light-absorbing abilities of black ink and white ink are different (the light-absorbing ability of black ink is greater than that of white ink), the light-absorbing properties of different regions may be controlled by adjusting the ratio of the two inks. For example, more black ink may be set in regions with greater reflective brightness, and more white ink may be set in regions with less reflective brightness. In other embodiments, all black ink may be set, and the light-absorbing properties of different regions may be controlled by controlling the size and distribution density of the black ink.

[0121] In some embodiments of the present disclosure, the distribution density of the extinction structure 42 located on the side of the slope area A3 close to the second light mixing area A2 in the direction from the top of the slope body 1013 to the bottom of the slope body 1013 is greater than the distribution density of the extinction structure 42 located on the side of the slope area A3 close to the first light mixing area A1 in the direction from the bottom of the slope body 1013 to the top of the slope body 1013; and / or, the projection area of ​​the extinction structure 42 located on the side of the slope area A3 close to the second light mixing area A2 in the direction from the top of the slope body 1013 to the bottom of the slope body 1013 on the back panel 101 is greater than the projection area of ​​the extinction structure 42 located on the side of the slope area A3 close to the first light mixing area A1 in the direction from the bottom of the slope body 1013 to the top of the slope body 1013.

[0122] It can be understood that since the light emitted by the second point light source 1022 has a higher light intensity at a large angle and a lower light intensity at a small angle after passing through the refractive lens 1032, the light incident on the lower end of the slope body 1013 is strong, forming a bright area, and the light incident on the upper end of the slope body 1013 is weak, forming a secondary bright area. Correspondingly, in the present embodiment, by making the distribution density of the extinction structure 42 located on the side (luminous area) of the slope area A3 close to the second light mixing area A2 greater than the distribution density of the extinction structure 42 located on the side (sub-luminous area) of the slope area A3 close to the first light mixing area A1; and / or, the projection area of ​​the extinction structure 42 located on the side (luminous area) of the slope area A3 close to the second light mixing area A2 on the back panel 101 is greater than the projection area of ​​the extinction structure 42 located on the side (sub-luminous area) of the slope area A3 close to the first light mixing area A1 on the back panel 101, the luminous phenomenon of different areas of the slope area A3 can be improved to varying degrees, so that the brightness of the slope area A3 is more uniform.

[0123] It should be noted that the projection area of ​​the matt structure 42 located on the side (luminous area) of the slope area A3 close to the second light mixing area A2 on the back plate 101 refers to: the sum of the projection areas of multiple matt structures 42 located in the luminous area on the back plate 101. The projection area of ​​the matt structure 42 located on the side (secondary luminous area) of the slope area A3 close to the first light mixing area A1 on the back plate 101 refers to: the sum of the projection areas of multiple matt structures 42 located in the secondary luminous area on the back plate 101.

[0124] In some embodiments, the projection area of ​​a single extinction structure 42 located in the luminous area on the back panel 101 is less than or equal to the projection area of ​​a single extinction structure 42 located in the secondary luminous area on the back panel 101, and the distribution density of the multiple extinction structures 42 located in the luminous area is greater than the distribution density of the multiple extinction structures 42 located in the secondary luminous area, so that the sum of the projection areas of the multiple extinction structures 42 located in the luminous area on the back panel 101 is greater than the sum of the projection areas of the multiple extinction structures 42 located in the secondary luminous area on the back panel 101.

[0125] In some embodiments, the projection area of ​​a single extinction structure 42 located in the luminous area on the back panel 101 is larger than the projection area of ​​a single extinction structure 42 located in the secondary luminous area on the back panel 101, so that the sum of the projection areas of multiple extinction structures 42 located in the luminous area on the back panel 101 is larger than the sum of the projection areas of multiple extinction structures 42 located in the secondary luminous area on the back panel 101.

[0126] In some embodiments of the present disclosure, the projection shape of the matt structure 42 on the back plate 101 includes one or more of a circle, an ellipse, a rectangle, and a triangle, but the embodiments of the present disclosure are not limited thereto. The projection shape of the matt structure 42 on the back plate 101 is preferably a circle, which is conducive to maintaining a uniform arrangement of the matt structures 42.

[0127] In some embodiments of the present disclosure, the projection shape of the sub-light absorption point 1042 on the reflective film 104 is circular, and the diameter of the sub-light absorption point 1042 is greater than or equal to 0.5 mm and less than or equal to 3 mm, for example, any value of 0.5 mm, 1 mm, 1.5 mm, 2 mm, and 3 mm; the difference in diameters of two adjacent sub-light absorption points 1042 is greater than or equal to 0 and less than or equal to 1 mm, for example, any value of 0, 0.4 mm, 0.6 mm, 0.8 mm, and 1 mm.

[0128] In some embodiments of the present disclosure, the projection shape of the first through hole 1043 on the back plate 101 is circular, and the diameter of the first through hole 1043 is greater than or equal to 1.5 mm and less than or equal to 5 mm, for example, any value of 1.5 mm, 2 mm, 3 mm, 4 mm, and 5 mm; the difference between the diameters of two adjacent first through holes 1043 is greater than or equal to 0 and less than or equal to 1.5 mm, for example, any value of 0, 0.6 mm, 0.9 mm, 1.2 mm, and 1.5 mm.

[0129] In some embodiments of the present disclosure, in a direction parallel to the boundary line between the first light mixing area A1 and the slope area A3, the distribution density of the matte structures 42 gradually decreases from the middle to the edge; in a direction from the bottom of the slope body 1013 to the top of the slope body 1013, the distribution density of the matte structures 42 gradually decreases. That is, the spacing between two adjacent matte structures 42 in a row gradually increases from the middle to the edge; the spacing between two adjacent matte structures 42 in a column gradually increases from the bottom to the top.

[0130] In some embodiments of the present disclosure, in a direction parallel to the boundary line between the first light mixing area A1 and the slope area A3, the difference in spacing between one sub-light absorption point 1042 and two adjacent sub-light absorption points 1042 is greater than or equal to 0 and less than or equal to 1 mm, for example, any value of 0, 0.4 mm, 0.6 mm, 0.8 mm, and 1 mm; the spacing between two adjacent sub-light absorption points 1042 is greater than or equal to 2 mm and less than or equal to 10 mm, for example, any value of 2 mm, 4 mm, 6 mm, 8 mm, and 10 mm. In the direction from the bottom of the slope body 1013 to the top of the slope body 1013, the difference in spacing between one sub-light absorption point 1042 and two adjacent sub-light absorption points 1042 is greater than or equal to 0 and less than or equal to 2 mm, for example, any value of 0, 0.5 mm, 1 mm, 1.5 mm, and 2 mm; the spacing between two adjacent sub-light absorption points 1042 is greater than or equal to 1.5 mm and less than or equal to 10 mm, for example, any value of 1.5 mm, 4 mm, 6 mm, 8 mm, and 10 mm.

[0131] Reference Fig.19 In some embodiments of the present disclosure, in the direction from the bottom of the slope body 1013 to the top of the slope body 1013, the diameter of the bottom terminal light absorption point 1042 is 1.5 mm, the diameter difference between two adjacent rows of sub-light absorption points 1042 is 0.05 mm, and the diameter gradually decreases from the bottom to the top, and the diameter of the top sub-light absorption point 1042 is 1.1 mm. In the direction parallel to the boundary line of the first light mixing area A1 and the slope area A3, the distance between the center of the sub-light absorption point 1042 at the bottom and the center line of the slope area A3 is 4 mm, and the distance between two adjacent sub-light absorption points 1042 every 5 rows increases by 0.2 mm, and so on.

[0132] Reference Fig. 20 In some embodiments of the present disclosure, the number of matt structures 42 in a row gradually decreases along the direction from the bottom of the slope body 1013 to the top of the slope body 1013. It can be understood that since the distribution density of the matt structures 42 near the top of the slope body 1013 is relatively small (i.e., the spacing is relatively large), it is necessary to set the number of matt structures 42 near the top of the slope body 1013 to be a little smaller. In some embodiments of the present disclosure, in the direction from the bottom of the slope body 1013 to the top of the slope body 1013, the difference in the number of matt structures 42 in adjacent rows is greater than or equal to 2 and less than or equal to 6, that is, 1 to 3 matt structures 42 are reduced on the left and right sides between two adjacent rows.

[0133] In some embodiments of the present disclosure, the extinction structure 42 that is closest to the first light mixing area A1 and closest to the middle frame 106 is a first extinction structure, and the reflective lens 1031 that is closest to the middle frame 106 and closest to the first extinction structure is a first reflective lens 1410; the first extinction structure is located on a side of the first reflective lens 1410 away from the middle frame 106, and the shortest distance e1 between the first extinction structure and an extension line of the side of the first reflective lens 1410 away from the middle frame 106 is greater than or equal to 0 and less than or equal to 3 mm, for example, any value of 0, 0.5 mm, 1 mm, 1.5 mm, and 3 mm. The extinction structure 42 that is closest to the second light mixing area A2 and closest to the middle frame 106 is the second extinction structure, and the refractive lens 1032 located in an adjacent column of the first reflective lens 1410 and closest to the slope area A3 is the first refractive lens 1420; the second extinction structure is located on the side of the first refractive lens 1420 that is close to the middle frame 106 and is away from the middle frame 106. The shortest distance e2 between the second extinction structure and the extension line of the first refractive lens 1420 that is close to the middle frame 106 is greater than or equal to 0 and less than or equal to 3 mm, for example, any value of 0, 0.5 mm, 1 mm, 1.5 mm, and 3 mm.

[0134] It is understandable that since there is only one light source 102 near the edge area, the brightness is low, so there is no need to reduce the reflection. In this embodiment, by leaving the edge area A31 of the reflective film 104 blank and not providing the extinction structure 42, the brightness of the edge area A31 can be avoided from being further reduced, and the phenomenon of darkening the edge can be improved.

[0135] In some embodiments of the present disclosure, in a direction parallel to the boundary line between the first light mixing area A1 and the slope area A3, the difference in spacing between a first through hole 1043 and two adjacent first through holes 1043 is greater than or equal to 0 and less than or equal to 1.5 mm, for example, any value of 0, 0.4 mm, 0.6 mm, 1 mm, and 1.5 mm; the spacing between two adjacent first through holes 1043 is greater than or equal to 3 mm and less than or equal to 10 mm, for example, any value of 3 mm, 5 mm, 6 mm, 8 mm, and 10 mm. In the direction from the bottom of the slope body 1013 to the top of the slope body 1013, the difference in spacing between one first through hole 1043 and two adjacent first through holes 1043 is greater than or equal to 0 and less than or equal to 2.5 mm, for example, any value of 0, 1 mm, 1.5 mm, 2 mm, and 2.5 mm; the spacing between two adjacent first through holes 1043 is greater than or equal to 2 mm and less than or equal to 10 mm, for example, any value of 2 mm, 4 mm, 6 mm, 8 mm, and 10 mm.

[0136] Reference Fig.21In some embodiments of the present disclosure, in the direction from the bottom of the slope body 1013 to the top of the slope body 1013, the diameter of the bottommost first through hole 1043 is 2.5 mm, the diameter difference between two adjacent rows of first through holes 1043 is 0.2 mm, and the diameter gradually decreases from the bottom to the top, and the diameter of the topmost first through hole 1043 is 1.7 mm. In the direction parallel to the boundary line of the first light mixing area A1 and the slope area A3, the distance between the centers of the two adjacent first through holes 1043 in the middle of the bottom is 5 mm, and the distance between the centers of the two adjacent first through holes 1043 in every 5 rows increases by 0.5 mm, and so on. The distance between the centers of the two adjacent first through holes 1043 in the edge area is 6 mm. In the direction from the bottom of the slope body 1013 to the top of the slope body 1013, the distance between the center of the first through hole 1043 in the bottom first row and the center of the first through hole 1043 in the second row is 3.5 mm, the distance between the center of the first through hole 1043 in the second row and the center of the first through hole 1043 in the third row is 3.7 mm, and the distance between the center of the first through hole 1043 in the third row and the center of the first through hole 1043 in the fourth row is 3.9 mm, that is, the difference in the distance between the centers of two adjacent first through holes 1043 is 0.2 mm, and so on gradually increases.

[0137] Fig.23a and Figure 23b The structural diagram of the display module according to some embodiments of the present disclosure is schematically shown.

[0138] Reference Fig.23a In some embodiments of the present disclosure, a first reflective layer 109 is disposed on a surface of the reflective film 104 located in the slope area A3 and close to the diffuser 105 , and a reflectivity of the first reflective layer 109 is lower than that of the reflective film 104 .

[0139] It can be understood that since the slope area A3 is irradiated with strong light, the brightness of the slope area A3 can be adjusted by adjusting the reflectivity of the material of the reflective film 104 in the slope area A3. In the present embodiment, a first reflective layer 109 with a lower reflectivity is provided on the reflective film 104 in the slope area A3, thereby reducing the reflectivity of the slope area A3 and improving the phenomenon of the slope area A3 shining.

[0140] The installation process of the first reflective layer 109 is as follows: first install the reflective film 104 on the back plate 101, and then attach the first reflective layer 109 to the reflective film 104 in the slope area A3. The reflectivity of the first reflective layer 109 is greater than or equal to 70% and less than or equal to 85%. The reflectivity of the first reflective layer 109 is adjusted according to the intensity of the light in the slope area A3. The specific adjustment method is: when the light in the slope area A3 is strong, the reflectivity of the first reflective layer 109 is preferably between 70% and 80%, and when the light in the slope area A3 is weak, the reflectivity of the first reflective layer 109 is preferably between 80% and 85%. The intensity of the light in the slope area A3 can be judged visually. The advantage of using the first reflective layer 109 is that it is easy to assemble, and only a section of low-reflectivity material needs to be attached to the reflective film 104.

[0141] Reference Figure 23b In some embodiments of the present disclosure, the reflective film 104 includes a first reflective sub-film 143 located on the first plate body 1011, a second reflective sub-film 144 located on the second plate body 1012, and a third reflective sub-film 145 located on the slope body 1013; the reflectivity of the first reflective sub-film 143 is equal to the reflectivity of the second reflective sub-film 144, and is greater than the reflectivity of the third reflective sub-film 145.

[0142] It can be understood that in this embodiment, by making the reflectivity of the third reflective sub-film 145 of the slope area A3 smaller than the reflectivity of the first reflective sub-film 143 and the second reflective sub-film 144, the reflectivity of the slope area A3 is reduced, thereby improving the phenomenon of the slope area A3 shining.

[0143] The installation process of the reflective film 104 of this embodiment is as follows: first install the first reflective sub-film 143 and the second reflective sub-film 144 respectively, and the reflectivity of the first reflective sub-film 143 and the second reflective sub-film 144 is consistent, preferably above 90%. Then install the third reflective sub-film 145 in the slope area A3, and the reflectivity of the third reflective sub-film 145 is preferably between 70% and 85%. The advantage of using reflective films 104 with different reflectivities is that only a layer of low-reflectivity material is attached to the slope area A3, and it is not easy to produce defects such as warping of the material.

[0144] In some embodiments of the present disclosure, the light color of the light source 102 is blue, and the light wavelength of the first point light source 1021 is greater than the light wavelength of the second point light source 1022 .

[0145] It is understandable that, in some embodiments, the first light mixing area A1 and the second light mixing area A2 will produce color difference due to the different light mixing distances. For example, when the light source 102 uses a blue light LED and the optical film 107 uses a quantum dot film, the blue light LED excites the quantum dot film to different degrees, resulting in different colors of the picture. Specifically, in the first light mixing area A1, the blue light emitted by the first point light source 1021 has a short optical path, and the transmitted blue light increases, resulting in a blue picture with low color coordinates; in the second light mixing area A2, the blue light emitted by the second point light source 1022 has a long optical path, and the transmitted blue light becomes less, resulting in a yellow picture with high color coordinates. In this embodiment, the color difference is adjusted by using different blue light wavelengths for the first point light source 1021 and the second point light source 1022, that is, a blue light LED with a smaller wavelength (445-455 nanometers) is used in the second light mixing area A2, and a blue light LED with a larger wavelength (455-465 nanometers) is used in the first light mixing area A1 to ensure the chromaticity consistency of the displayed picture.

[0146] It can be understood that the embodiment of the present disclosure sets two mixing distances and adopts different lens and light source combinations respectively, and also adjusts the light source arrangement, light source drive, light source color difference, slope structure and reflective film, thereby ensuring the brightness and chromaticity consistency of the direct-down display device, achieving high image quality, improving user experience, and reducing packaging costs.

[0147] Although some embodiments according to the general inventive concept of the present disclosure have been illustrated and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the general inventive concept of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A backlight module, characterized in that: The backlight module includes a first light mixing area, a second light mixing area, and at least one slope area between the first light mixing area and the second light mixing area, the light mixing distance in the first light mixing area is smaller than the light mixing distance in the second light mixing area, and the backlight module further includes: A back plate, comprising a first plate body located in the first light mixing area, a second plate body located in the second light mixing area, and a slope body located in the slope area, wherein the first plate body is arranged parallel to the second plate body, the top of the slope body is connected to the first plate body, and the bottom of the slope body is connected to the second plate body; A light source, comprising a plurality of first point light sources located in the first light mixing area and a plurality of second point light sources located in the second light mixing area; a lens group, comprising a reflective lens located on the first point light source and a refractive lens located on the second point light source; A reflective film, located on a side of the back plate close to the light source; a diffusion plate, located on a side of the lens group away from the back plate; and The middle frame is arranged around the four sides of the back plate.

2. The backlight module according to claim 1, characterized in that: A surface of one side of the slope body close to the diffusion plate is any one of a concave arc surface, a convex arc surface, and at least one section of a flat surface.

3. The backlight module according to claim 1, characterized in that: A surface of one side of the slope body close to the diffuser plate is a flat surface; and An included angle between the slope body and the second plate body is greater than or equal to 90 degrees and less than or equal to 135 degrees.

4. The backlight module according to claim 1, characterized in that: The angle between the middle frame and the first plate or the second plate is greater than or equal to 90 degrees and less than 180 degrees; The first light mixing area includes a first edge area and a first middle area between the first edge area and the slope area, the middle frame overlaps with the first edge area, and the distribution density of the first point light sources located in the first edge area is greater than the distribution density of the first point light sources located in the first middle area; and The second light mixing zone includes a second edge area, a third edge area, and a second middle area located between the second edge area and the third edge area, the middle frame overlaps with the second edge area, the slope area overlaps with the third edge area, and the distribution density of the second point light sources in the second edge area and the distribution density of the second point light sources in the third edge area are both greater than the distribution density of the second point light sources in the second middle area.

5. The backlight module according to claim 1, characterized in that: The backlight module comprises a light source setting area corresponding to the display area of ​​the display panel, and the light sources are arranged in an array in the light source setting area; The minimum distance between the first point light source in the first row close to the middle frame and the edge of the light source setting area, and the minimum distance between the first point light source in the first column close to the middle frame and the edge of the light source setting area are first values; The minimum distance between the first point light sources in the second row close to the middle frame and the first point light sources in the first row close to the middle frame, and the minimum distance between the first point light sources in the second column close to the middle frame and the first point light sources in the first column close to the middle frame are second values; The point light sources located between the first point light sources in the second row close to the middle frame and the second point light sources in the first row close to the slope area, and between two first point light sources in the second column close to the middle frame are evenly spaced, and the distance of the evenly spaced distribution is a third value; The first value is smaller than the second value, and the second value is smaller than or equal to the third value.

6. The backlight module according to claim 5, characterized in that: The ratio of the first value to the second value is greater than or equal to 1 / 2 and less than or equal to 2 / 3.

7. The backlight module according to claim 1, characterized in that: The backlight module comprises a light source setting area corresponding to the display area of ​​the display panel, and the light sources are arranged in an array in the light source setting area; The minimum distance between the second point light source in the first row close to the middle frame and the edge of the light source setting area, and the minimum distance between the second point light source in the first column close to the middle frame and the edge of the light source setting area are fourth values; The minimum distance between the second point light source in the second row close to the middle frame and the second point light source in the first row close to the middle frame, and the minimum distance between the second point light source in the second column close to the middle frame and the second point light source in the first column close to the middle frame are fifth values; The point light sources located between the second point light sources in the second row close to the slope area and the second point light sources in the second row close to the middle frame, and between two second point light sources in the second column close to the middle frame are evenly spaced, and the distance of the evenly spaced distribution is a sixth value; The fourth value is smaller than the fifth value, and the fifth value is smaller than or equal to the sixth value.

8. The backlight module according to claim 7, characterized in that: The distance between the orthographic projection of the first row of second point light sources close to the slope area on the diffuser and the orthographic projection of the top of the slope body on the diffuser is a seventh value; The distance between the second point light sources in the second row close to the slope area and the second point light sources in the first row close to the slope area is an eighth value; The seventh value is smaller than the eighth value, and the eighth value is smaller than or equal to the sixth value.

9. The backlight module according to claim 8, characterized in that: The ratio of the fourth value to the fifth value is greater than or equal to 1 / 2 and less than or equal to 2 / 3; The ratio of the seventh value to the eighth value is greater than or equal to 1 / 2 and less than or equal to 2 / 3.

10. The backlight module according to claim 8, characterized in that: The distance between the orthographic projection of the first point light source in the first row close to the slope area on the diffuser plate and the orthographic projection of the bottom of the slope body on the diffuser plate is a ninth value; The seventh value is greater than or equal to the ninth value.

11. The backlight module according to claim 1, characterized in that: The angle between the middle frame and the first plate or the second plate is greater than or equal to 90 degrees and less than 180 degrees; The first light mixing area includes a first edge area and a first middle area between the first edge area and the slope area, the middle frame overlaps with the first edge area, and the driving power of the first point light source located in the first edge area is less than the driving power of the first point light source located in the first middle area; as well as The second light mixing area includes a second edge area, a third edge area, and a second middle area located between the second edge area and the third edge area, the middle frame overlaps with the second edge area, the slope area overlaps with the third edge area, and the driving power of the second point light source in the second edge area and the driving power of the second point light source in the third edge area are both less than the driving power of the second point light source in the second middle area.

12. The backlight module according to claim 1, characterized in that: The light source array arrangement; The driving power of the first point light source in the first row close to the middle frame is the first power; The driving power of the first point light sources in the second row close to the middle frame is the second power; The first power is less than or equal to the second power, the second power is less than or equal to the rated power of the first point light source, and the first power is less than the rated power of the first point light source.

13. The backlight module according to claim 12, characterized in that: A ratio of the first power to the rated power of the first point light source is greater than or equal to 0.94 and less than or equal to 0.97; A ratio of the second power to the rated power of the first point light source is greater than or equal to 0.97 and less than or equal to 1.

14. The backlight module according to claim 1, characterized in that: The light source array arrangement; The driving power of the second point light sources in the first row close to the middle frame and the driving power of the second point light sources in the first row close to the slope area are fourth powers; The driving power of the second point light sources in the second row close to the middle frame and the driving power of the second point light sources in the second row close to the slope area are fifth powers; The fourth power is less than or equal to the fifth power, the fifth power is less than or equal to the rated power of the second point light source, and the fourth power is less than the rated power of the second point light source.

15. The backlight module according to claim 14, characterized in that: A ratio of the fourth power to the rated power of the second point light source is greater than or equal to 0.94 and less than or equal to 0.97; A ratio of the fifth power to the rated power of the second point light source is greater than or equal to 0.97 and less than or equal to 1.

16. The backlight module according to claim 1, characterized in that: A ratio of the brightness of the first point light source to the brightness of the second point light source is a first ratio; The ratio of the brightness at the first mixed light distance to the brightness at the second mixed light distance is a second ratio; The ratio of the reflected brightness to the refracted brightness is the third ratio; The ratio of the rated power of the second point light source to the rated power of the first point light source is equal to the product of the first ratio, the second ratio and the third ratio.

17. The backlight module according to claim 16, characterized in that: The third ratio is greater than or equal to 5 / 6 and less than or equal to 10 / 11.

18. The backlight module according to claim 1, characterized in that: The ratio of the number of the first point light sources to the number of the second point light sources is greater than or equal to 0.5 and less than or equal to 3, or A ratio of a distribution density of the first point light sources to a distribution density of the second point light sources is greater than or equal to 0.5 and less than or equal to 1.

5.

19. The backlight module according to claim 1, characterized in that: The distance between two adjacent first point light sources is greater than or equal to 40 mm and less than or equal to 100 mm, and the distance between two adjacent second point light sources is greater than or equal to 50 mm and less than or equal to 120 mm.

20. The backlight module according to claim 1, characterized in that: The reflective film is provided with a plurality of avoidance holes to expose the light source and the lens group, the plurality of avoidance holes are divided into a first hole and a second hole, the first hole is located in the first light mixing area, and the second hole is located in the second light mixing area; The orthographic projection of the reflective lens on the back plate partially overlaps with the orthographic projection of the first hole on the back plate; The orthographic projection of the refractive lens on the back plate is located within the orthographic projection of the second hole on the back plate.

21. The backlight module according to claim 20, characterized in that: The portion of the reflective film that overlaps with the orthographic projection area of ​​the reflective lens on the reflective film is located between the reflective lens and the back plate.

22. The backlight module according to claim 20, characterized in that: The shape of the orthographic projection of the reflective lens on the back plate is a square, the width of the first hole in the first direction is greater than the side length of the square, the width of the first hole in the second direction is less than the side length of the square, and the first direction is perpendicular to the second direction; The orthographic projection of the refractive lens on the back plate is in the shape of a circle, and the diameter of the second hole is greater than the diameter of the circle.

23. The backlight module according to claim 22, characterized in that: The difference between the width of the first hole in the first direction and the side length of the square is greater than or equal to 0.5 mm and less than or equal to 1.5 mm; The difference between the side length of the square and the width of the first hole in the second direction is greater than or equal to 0.5 mm and less than or equal to 1 mm; A difference between a diameter of the second hole and a diameter of the circle is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

24. The backlight module according to claim 1, characterized in that: The backlight module further includes a dotted line, which is located on the reflective film at a boundary between the first light mixing area and the slope area, and / or the dotted line is located on the reflective film at a boundary between the second light mixing area and the slope area.

25. The backlight module according to claim 1, characterized in that: The backlight module further includes a plurality of extinction structures, and the plurality of extinction structures are located on a side of the reflective film in the slope area close to the diffusion plate or on the reflective film in the slope area.

26. The backlight module according to claim 25, characterized in that: The extinction structure includes a sub-light absorption point, and the sub-light absorption point is located on a side surface of the reflective film in the slope area close to the diffuser plate; or, The extinction structure includes a first through hole, and the first through hole is located on the reflective film in the slope area.

27. The backlight module according to claim 25, characterized in that: The material of the matte structure includes black ink and / or white ink, and the ratio of the amount of the white ink to the amount of the black ink is greater than or equal to 0 and less than or equal to 50.

28. The backlight module according to claim 25, characterized in that: The distribution density of the extinction structures on the side of the slope area close to the second light mixing area in the direction from the top of the slope body to the bottom of the slope body is greater than the distribution density of the extinction structures on the side of the slope area close to the first light mixing area in the direction from the bottom of the slope body to the top of the slope body; and / or, The projection area of ​​the extinction structure on the back panel located on the side of the slope zone close to the second light mixing zone in the direction from the top of the slope body to the bottom of the slope body is greater than the projection area of ​​the extinction structure on the back panel located on the side of the slope zone close to the first light mixing zone in the direction from the bottom of the slope body to the top of the slope body.

29. The backlight module according to claim 28, characterized in that: The projection shape of the matte structure on the back plate includes one or more of a circle, an ellipse, a rectangle, and a triangle.

30. The backlight module according to claim 29, characterized in that: The extinction structure includes a sub-light absorption point, the sub-light absorption point is located on a side surface of the reflective film in the slope area close to the diffuser plate, the projection shape of the sub-light absorption point on the reflective film is circular, the diameter of the sub-light absorption point is greater than or equal to 0.5 mm and less than or equal to 3 mm, and the difference in diameters of two adjacent sub-light absorption points is greater than or equal to 0 and less than or equal to 1 mm; or The extinction structure includes a first through hole, which is located on the reflective film in the slope area. The projection shape of the first through hole on the back plate is circular, and the diameter of the first through hole is greater than or equal to 1.5 mm and less than or equal to 5 mm; the difference in diameters between two adjacent first through holes is greater than or equal to 0 and less than or equal to 1.5 mm.

31. The backlight module according to claim 28, characterized in that: In a direction parallel to the boundary line between the first light mixing area and the slope area, the distribution density of the extinction structure gradually decreases from the middle to the edge; in a direction from the bottom of the slope body to the top of the slope body, the distribution density of the extinction structure gradually decreases.

32. The backlight module according to claim 31, characterized in that: The number of the matting structures in a row gradually decreases from the bottom of the slope body to the top of the slope body.

33. The backlight module according to claim 32, characterized in that: In a direction from the bottom of the slope body to the top of the slope body, a difference in the number of the matting structures in adjacent rows is greater than or equal to 2 and less than or equal to 6.

34. The backlight module according to claim 32, characterized in that: The extinction structure that is closest to the first light mixing area and closest to the middle frame is a first extinction structure, and the reflective lens that is closest to the middle frame and closest to the first extinction structure is a first reflective lens; The first extinction structure is located on a side of the first reflective lens away from the middle frame; The extinction structure closest to the second light mixing area and the middle frame is a second extinction structure, and the refractive lens located in an adjacent column of the first reflective lens and closest to the slope area is a first refractive lens; The second matte structure is located on a side of an extension line of a side of the first refractive lens close to the middle frame and away from the middle frame.

35. The backlight module according to claim 1, characterized in that: A first reflective layer is disposed on a surface of one side of the reflective film located in the slope area close to the diffuser plate, and the reflectivity of the first reflective layer is lower than the reflectivity of the reflective film.

36. The backlight module according to claim 1, characterized in that: The reflective film comprises a first reflective sub-film located on the first plate body, a second reflective sub-film located on the second plate body, and a third reflective sub-film located on the slope body; The reflectivity of the first reflective sub-film is equal to the reflectivity of the second reflective sub-film, and is greater than the reflectivity of the third reflective sub-film.

37. The backlight module according to claim 1, characterized in that: The light source emits blue light, and the light wavelength of the first point light source is greater than the light wavelength of the second point light source.

38. The backlight module according to any one of claims 1 to 37, characterized in that: The second light mixing area is located on one side of the first light mixing area; or The second light mixing area is located at two opposite sides of the first light mixing area; or The second light mixing area is located on two adjacent sides of the first light mixing area; or The second light mixing area is located on three adjacent sides of the first light mixing area; or The second light mixing area is arranged around the first light mixing area.

39. A display module, characterized in that: The display module comprises: The backlight module according to any one of claims 1 to 38; and The display panel is located on the light emitting surface of the backlight module.

40. A display device, characterized in that: The display device comprises: The display module according to claim 39; and The power supply board is located on a side of the back plate in the first light mixing area away from the display panel.

41. The display device according to claim 40, characterized in that In the light emitting direction of the display module, the sum of the thickness of the power board, the distance between the power board and the first board body, and the distance between the power board and the extension line of the second board body is a first sum value; The difference between the light mixing distance in the second light mixing area and the light mixing distance in the first light mixing area is substantially equal to the first sum value.

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