Backlight module, display module and display device

Abstract

Provided is a backlight module, comprising a first light-mixing region, a second light-mixing region, and at least one slope region located between the first light-mixing region and the second light-mixing region, wherein the light-mixing distance in the first light-mixing region is less than the light-mixing distance in the second light-mixing region. The backlight module further comprises a backplane, a light source, a lens group, a reflective film, a diffusion plate and a middle frame, wherein the backplane comprises a first plate body located in the first light-mixing region, a second plate body located in the second light-mixing region, and a slope body located in the slope region; the light source comprises a plurality of first point light sources located in the first light-mixing region and a plurality of second point light sources located in the second light-mixing region; the lens group comprises reflective lenses located on the first point light sources and refractive lenses located on the second point light sources; the reflective film is located on the side of the backplane close to the light source; the diffusion plate is located on the side of the lens group away from the backplane; and the middle frame is arranged around the backplane.

Description

Backlight module, display module and display device Technical Field

[0001] This disclosure relates to the field of display technology, and more particularly to a backlight module, a display module, and a display device. Background Technology

[0002] In related technologies, direct-lit display devices have a relatively large overall thickness, especially the thick protruding part on the back, and the back shape is often a two- or multi-tiered design, resulting in poor aesthetics, high packaging costs, and poor wall adhesion. In addition, direct-lit display devices are prone to problems such as uneven screen brightness, dark borders, and bright edges, resulting in poor image quality and affecting the subjective visual experience.

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

[0004] In one aspect, a backlight module is provided, the backlight module including a first mixing area, a second mixing area, and at least one ramp area located between the first mixing area and the second mixing area, wherein the mixing distance in the first mixing area is less than the mixing distance in the second mixing area, the backlight module further including a back plate, a light source, a lens group, a reflective film, a diffuser plate, and a middle frame; the back plate includes a first plate body located in the first mixing area, a second plate body located in the second mixing area, and a ramp body located in the ramp area, the first plate body and the second plate body being arranged parallel to each other, the top of the ramp body being connected to the first plate body, and the bottom of the ramp body being connected to the second plate body; the light source includes a plurality of first point light sources located in the first mixing area and a plurality of second point light sources located in the second mixing area; the lens group includes 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 the side of the back plate closer to the light source; the diffuser plate is located on the side of the lens group away from the back plate; the middle frame is arranged around the back plate.

[0005] On the other hand, a display module is provided, the display module including a backlight module as described above and a display panel, the display panel being located on the light-emitting surface of the backlight module.

[0006] In another aspect, a display device is provided, the display device including a display module as described above and a power board, the power board being located on the side of a backplate in a first light mixing zone away from the display panel. Attached Figure Description

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

[0008] Figure 1 is a rear view of a display device according to some embodiments of the present disclosure;

[0009] Figure 2 is a side view of a display device according to some embodiments of the present disclosure;

[0010] Figures 3a and 3b are cross-sectional views of a display device according to some embodiments of the present disclosure along the A-A' direction in Figure 1 and along the B-B' direction in Figure 1;

[0011] Figure 4 is a schematic diagram of the structure of a display module according to some embodiments of the present disclosure;

[0012] Figures 5a to 5e are rear views and cross-sectional views of a backlight module according to some embodiments of the present disclosure;

[0013] Figure 6a is an optical path diagram of a ramp body with a convex arc surface shape according to some embodiments of the present disclosure;

[0014] Figure 6b is a brightness curve diagram corresponding to the convex arc shape of the ramp body according to some embodiments of the present disclosure;

[0015] Figure 7a is an optical path diagram of a ramp body with a concave arc surface shape according to some embodiments of the present disclosure;

[0016] Figure 7b is a brightness curve diagram corresponding to the concave arc surface shape of the ramp body according to some embodiments of the present disclosure;

[0017] Figure 8a is an optical path diagram of a ramp body with a planar shape according to some embodiments of the present disclosure;

[0018] Figure 8b is a brightness curve diagram corresponding to a planar shape of a ramp body according to some embodiments of the present disclosure;

[0019] Figure 9 is an optical path diagram of a ramp body with two planar shapes according to some embodiments of the present disclosure;

[0020] Figure 10a is a schematic diagram showing that the angle between the ramp and the second plate is 140 degrees according to some embodiments of the present disclosure;

[0021] Figure 10b is a brightness curve diagram corresponding to an angle of 140 degrees between the ramp and the second plate according to some embodiments of the present disclosure;

[0022] Figure 11a is a schematic diagram showing that the angle between the ramp and the second plate is 120 degrees according to some embodiments of the present disclosure;

[0023] Figure 11b is a brightness curve diagram corresponding to a 120-degree angle between the ramp and the second plate according to some embodiments of the present disclosure;

[0024] Figure 12a is a schematic diagram showing that the angle between the ramp and the second plate is 100 degrees according to some embodiments of the present disclosure;

[0025] Figure 12b is a brightness curve diagram corresponding to a 100-degree angle between the ramp and the second plate according to some embodiments of the present disclosure;

[0026] Figure 13 is a brightness curve diagram corresponding to the equally spaced arrangement of light sources according to some embodiments of the present disclosure;

[0027] Figure 14a is a schematic diagram of the arrangement of light source arrays according to some embodiments of the present disclosure;

[0028] Figures 14b, 14c and 14d are schematic diagrams of light sources arranged at non-equal intervals along the C-C', D-D' and E-E' directions in Figure 14a according to some embodiments of the present disclosure;

[0029] Figure 14e is a brightness curve diagram corresponding to the non-equal spacing arrangement of light sources according to some embodiments of the present disclosure;

[0030] Figure 15 is a schematic diagram of a light source driving setup according to some embodiments of the present disclosure;

[0031] Figure 16 is a schematic diagram of light source driving control according to some embodiments of the present disclosure;

[0032] Figure 17 is a schematic diagram of the structure of a reflective film according to some embodiments of the present disclosure;

[0033] Figures 18a and 18b are schematic diagrams showing the relative positional relationship between a reflective lens and a first aperture and a refractive lens and a second aperture, respectively, according to some embodiments of the present disclosure.

[0034] Figure 19 is a partial structural schematic diagram of a sub-absorbing point according to some embodiments of the present disclosure;

[0035] Figure 20 is a schematic diagram of the edge structure of a reflective film according to some embodiments of the present disclosure;

[0036] Figure 21 is a partial structural schematic diagram of a first through hole according to some embodiments of the present disclosure;

[0037] Figure 22 is a partial structural schematic diagram of a reflective film according to some embodiments of the present disclosure;

[0038] Figures 23a and 23b are schematic diagrams of the structure of a display module according to some embodiments of the present disclosure. Detailed Implementation

[0039] In the following description, numerous specific details are set forth for illustrative purposes to provide a comprehensive understanding of various exemplary embodiments. However, it will be apparent that various exemplary embodiments may be implemented without these specific details or with one or more equivalent arrangements. In other instances, well-known structures and apparatuses are shown in block diagram form to avoid unnecessarily obscuring the various exemplary embodiments. Furthermore, the various exemplary embodiments may be different, but not necessarily exclusive. For example, specific shapes, configurations, and characteristics of exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0040] In the accompanying drawings, the dimensions and relative dimensions of the elements may be enlarged for clarity and / or descriptive purposes. Thus, the dimensions and relative dimensions of the individual elements are not necessarily limited to those shown in the drawings. When exemplary embodiments can be implemented differently, the specific process sequence may be performed differently than the order described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of description. Furthermore, the same reference numerals denote the same elements.

[0041] When an element is described as being "on" another element, "connected" to another element, or "bonded" to another element, the element may be directly on, directly connected to, or directly bonded to the other 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 bonded" to another element, there are no intermediate elements. Other terms and / or expressions used to describe relationships between elements should be interpreted in a similar manner, such as "between" to "directly between," "adjacent" to "directly adjacent," or "on" to "directly on," etc. Furthermore, the term "connection" may refer to a physical connection, an electrical connection, a communication connection, and / or a fluid connection.

[0042] It should be noted that in this paper, "same layer" refers to a layer structure formed by using the same film deposition process to form a film layer for a specific pattern, and then using the same mask to pattern that film layer in a single patterning process. Depending on the specific pattern, a single patterning process may include multiple exposure, development, or etching processes, and the specific pattern in the formed layer structure can be continuous or discontinuous. That is, multiple elements, components, structures, and / or portions located in the "same layer" are made of the same material and formed by the same single patterning process. Typically, multiple elements, components, structures, and / or portions located in the "same layer" have approximately the same thickness.

[0043] 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 merely used to distinguish one element from another. For example, without departing from the scope of the exemplary embodiments, a first element may be named a second element, and similarly, a second element may be named a first element.

[0044] In related technologies, direct-lit display devices suffer from significant overall thickness, especially the thick protruding back portion, and their two- or multi-tiered back design results in poor aesthetics, high packaging costs, and poor wall adhesion. Furthermore, direct-lit display devices are prone to uneven screen brightness, dark borders, and bright edges, leading to poor image quality and negatively impacting subjective visual experience. Therefore, to address at least one aspect of these technical problems, embodiments of this disclosure provide a backlight module, a display module, and a display device, which facilitates brightness and color consistency, achieving high image quality in the display device.

[0045] 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. Figures 3a and 3b are cross-sectional views of the display device according to some embodiments of the present disclosure along the A-A' direction in Figure 1 and along the B-B' direction in Figure 1, respectively. Figure 4 is a schematic structural diagram of a display module according to some embodiments of the present disclosure.

[0046] Referring to Figures 1 to 4, this 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, with the display panel 200 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 ramp area A3 located between the first light-mixing area A1 and the second light-mixing area A2. The light-mixing distance D1 within the first light-mixing area A1 is less than the light-mixing distance D2 within the second light-mixing area A2. The backlight module 100 also includes a back plate 101, a light source 102, a lens group 103, a reflective film 104, a diffuser plate 105, and a middle frame 106. The backplate 101 includes a first plate 1011 located in a first light mixing zone A1, a second plate 1012 located in a second light mixing zone A2, and a ramp 1013 located in a ramp zone A3. The first plate 1011 and the second plate 1012 are arranged parallel to each other. The top of the ramp 1013 is connected to the first plate 1011, and the bottom of the ramp 1013 is connected to the second plate 1012. The light source 102 includes a plurality of first point light sources 1021 located in the first light mixing zone A1 and a plurality of second point light sources 1022 located in the second light mixing zone A2. The lens group 103 includes a reflective lens 1031 located on the first point light sources 1021 and a refractive lens 1032 located on the second point light sources 1022. The reflective film 104 is located on the side of the backplate 101 near the light source 102. The reflective film 104 has a plurality of clearance holes 1041 to expose the light source 102 and the lens group 103. The diffuser plate 105 is located on the side of the lens group 103 away from the back plate 101, and the middle frame 106 is arranged around the back plate 101. The power board 300 is located on the side of the back plate 101 in the first light mixing zone A1 away from the display panel 200.

[0047] It is understandable that, as shown in Figures 3a and 4, in this embodiment, by setting two mixing distances in a backlight module 100, the power board 300 can be placed in the first mixing area A1 with a smaller mixing distance. As can be seen from Figures 1 and 2, the back structure of the entire display device becomes a plane, making the display device thinner and more aesthetically pleasing. When the display device is a wall-mounted structure or embedded in a wall, the distance between it and the wall will also be reduced, and the packaging load capacity will be increased, reducing packaging and transportation costs.

[0048] It should be noted that the light mixing distance refers to the distance between the emitting surface of the light source 102 and the lower surface of the diffuser plate 105. Generally, the larger the light mixing distance, the more uniform the light mixing and the better the image effect. In this embodiment, the first light mixing area A1 refers to the area where the light emitted by multiple first point light sources 1021 mixes, the second light mixing area A2 refers to the area where the light emitted by multiple second point light sources 1022 mixes, and the slope area A3 corresponds to the area where the slope body 1013 is located. The light mixing distance D1 in the first light mixing area A1 is less 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 plate 105 located in the first light mixing area A1 is less than the distance between the light source 102 and the diffuser plate 105 located in the second light mixing area A2.

[0049] It should be noted that the light source 102 is mounted on the lamp plate, which is located on the side of the back plate 101 near the diffuser plate 105.

[0050] It should be noted that the principle of the refractive lens 1032 is as follows: light emitted from 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 increasing the viewing angle of the light source 102. The principle of the reflective lens 1031 is as follows: light emitted from the light source 102 at a smaller angle (0-45 degrees) undergoes a first reflection after passing through the inner wall of the reflective lens 1031. This reflected light then enters the reflective film 104 for a second reflection and finally exits the backlight module 100; while light emitted from the light source 102 at a larger angle (45-90 degrees) is refracted after passing through the inner wall of the reflective lens 1031, and the angle of the outgoing light is deflected. Because light at smaller angles is reflected, the brightness directly above the light source 102 paired with the reflective lens 1031 decreases, and the angle of the outgoing light increases, thus the viewing angle of the reflective lens 1031 is wider. For example, the viewing angles of the refracting lens 1032 and the reflecting lens 1031 are 160 degrees and 170 degrees, respectively.

[0051] It is understandable that, since the mixing distance D1 in the first mixing zone A1 is small, if the combination of the refractive lens 1032 and the light source 102 is used, the angle of the emitted light is small, the mixing is uneven, and it is easy to produce lamp shadows; in addition, some of the emitted light from the reflective lens 1031 will be reflected back and forth in the backlight module 100, resulting in low light output efficiency. In this embodiment, by employing a reflective lens 1031 within the first mixing zone A1, which has a relatively small mixing distance, the light can be mixed uniformly and shadows can be avoided due to the large viewing angle of the reflective lens 1031. Although the light extraction efficiency is reduced by using the reflective lens 1031, the energy loss of reflected light is also reduced because the mixing distance D1 of the first mixing zone A1 is smaller than the mixing distance D2 of the second mixing zone A2. Similarly, by employing a refractive lens 1032 within the second mixing zone A2, which has a larger mixing distance, the light can be mixed uniformly and shadows can be avoided due to the larger mixing distance D2 of the second mixing zone A2. The light extraction efficiency is essentially unaffected by using the refractive lens 1032. Therefore, the solution in this embodiment can both avoid shadows and improve the light extraction efficiency of the light source 102.

[0052] In some embodiments, the refractive lens 1032 is adapted to a light mixing distance of 20mm or more, and the reflective lens 1031 is adapted to a light mixing distance between 10mm and 20mm. In this embodiment, by utilizing the difference in the light mixing distances of the two lenses, the power board 300 is placed at the step difference position, making the back of the entire display device a flat surface, resulting in a thinner and more aesthetically pleasing design. In other embodiments, either the refractive lens 1032 or the reflective lens 1031 can be provided in both the first light mixing area A1 and the second light mixing area A2.

[0053] In some embodiments of this disclosure, as shown in FIG3a, in the light emission 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 1011, and the distance a3 between the extension line of the power board 300 and the second plate 1012 is a first sum value D3; 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 basically equal to the first sum value D3.

[0054] It is understandable that the difference between the light mixing distance D2 in the second light mixing zone A2 and the light mixing distance D1 in the first light mixing zone 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 during manufacturing, within the allowable range of process errors, the difference between the light mixing distance D2 in the second light mixing zone A2 and the light mixing distance D1 in the first light mixing zone A1 is basically 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 extension lines of the power board 300 and the second plate 1012.

[0055] It is understandable that, since Figure 3b is a cross-sectional view of the first light mixing zone A1, there is no slope zone A3 and second light mixing zone A2 in Figure 3b, and the power board 300 is located on the side of the first board 1011 away from the display panel 200.

[0056] Referring to 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 electro-galvanized steel sheet (SECC), hot-dip galvanized steel sheet (SGCC), stainless steel (SUS304), plastic, etc.

[0057] In some embodiments, the material of the backplate 101 includes, but is not limited to, aluminum, electro-galvanized steel sheet (SECC), hot-dip galvanized steel sheet (SGCC), etc. The reflective film 104 has a reflectivity greater than 90%, and 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-scale light-emitting diodes (Mini-LEDs), such as 1515 (1.5mm*1.5mm), 1313 (1.3mm*1.3mm), etc., or packaged light-emitting diodes, such as 3030 (3mm*3mm), 3528 (3.5mm*2.8mm), 7020 (7mm*2mm), 4014 (4mm*1.4mm), etc. The emission 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, and the material of the middle frame 106 includes plastic, aluminum profile, iron plate, etc. The diffuser plate 105 can be made of glass or plastic materials such as polystyrene (PS) or polycarbonate (PC). The display panel 200 includes an array substrate and a color filter substrate, as well as upper and lower polarizers. The specific structure of the display panel 200 is similar to that of a conventional structure and will not be 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.

[0058] Figures 5a to 5e are rear views and cross-sectional views of backlight modules according to some embodiments of the present disclosure.

[0059] In some embodiments of this disclosure, referring to FIG5a, where the left side represents a rear view of the backlight module and the right side represents a cross-sectional view of the backlight module, 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 below 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 supply board 300 can be placed in the step difference space in the upper part.

[0060] In some embodiments of this disclosure, referring to FIG5b, where the left side represents a rear view of the backlight module and the right side represents a cross-sectional view of the backlight module, the second light mixing area A2 is located on opposite sides of the first light mixing area A1. Specifically, the second light mixing area A2 is located above and below 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 supply board 300 can be placed within the step difference space in the middle part.

[0061] In some embodiments of this disclosure, referring to FIG5c, where the left side represents a rear view of the backlight module and the right side represents a cross-sectional view of the backlight module, the second light mixing area A2 is located on both sides adjacent to the first light mixing area A1. Specifically, the second light mixing area A2 is located to the left and below 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 in the upper right part.

[0062] In some embodiments of this disclosure, referring to FIG5d, where the left side represents a rear view of the backlight module and the right side represents a cross-sectional view of the backlight module, the second light mixing area A2 is located on the three adjacent sides of the first light mixing area A1. Specifically, the second light mixing area A2 is located on the left, right, 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 area of ​​the upper part of the backlight module, and the power board 300 can be placed within the step difference space of the middle area of ​​the upper part.

[0063] In some embodiments of this disclosure, referring to FIG5e, where the left side represents a rear view of the backlight module and the right side represents a cross-sectional view of the backlight module, the second light mixing area A2 is disposed 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 region of the backlight module, and the power board 300 can be placed within the step difference space in the middle region of the backlight module.

[0064] Specifically, when the second light mixing area A2 is located on one side of the first light mixing area A1, as shown in Figure 5a, the backlight module 100 includes only one ramp area A3. When the second light mixing area A2 is located on opposite sides or adjacent sides of the first light mixing area A1, as shown in Figures 5b or 5c, the backlight module 100 includes two ramp areas A3. When the second light mixing area A2 is located on three adjacent sides of the first light mixing area A1, as shown in Figure 5d, the backlight module 100 includes three ramp areas A3. When the second light mixing area A2 is arranged around the first light mixing area A1, as shown in Figure 5e, the backlight module 100 includes four ramp areas A3.

[0065] Figure 6a is an optical path diagram of a ramp 1013 with a convex arc shape according to some embodiments of the present disclosure. Figure 6b is a brightness curve corresponding to a ramp 1013 with a convex arc shape according to some embodiments of the present disclosure. Figure 7a is an optical path diagram of a ramp 1013 with a concave arc shape according to some embodiments of the present disclosure. Figure 7b is a brightness curve corresponding to a ramp 1013 with a concave arc shape according to some embodiments of the present disclosure. Figure 8a is an optical path diagram of a ramp 1013 with a planar shape according to some embodiments of the present disclosure. Figure 8b is a brightness curve corresponding to a ramp 1013 with a planar shape according to some embodiments of the present disclosure. Figure 9 is an optical path diagram of a ramp 1013 with two planar shapes according to some embodiments of the present disclosure.

[0066] Referring to Figures 6a, 7a, 8a, and 9, in some embodiments of this disclosure, the surface of the ramp 1013 near the diffuser 105 is any one of a concave arc surface, a convex arc surface, or at least a section of a plane. As can be seen from Figures 6a, 7a, and 8a, when the surface of the ramp 1013 near the diffuser 105 is a section of a plane, the reflected light is more uniform, with the same distribution as the incident light, and there is no light aggregation or divergence, resulting in more uniform image brightness. However, when the surface of the ramp 1013 near the diffuser 105 is a concave or convex arc surface, the reflected light is further away from the upper end of the ramp 1013, resulting in less light at the upper end of the ramp 1013 and more light in the area closer to the ramp 1013, leading to uneven image brightness. As can be seen from Figure 9, when the surface of the slope 1013 near the diffuser plate 105 is a multi-segment plane, the direction of light reflection is inconsistent at different positions on the slope 1013. The light that hits the bottom of the slope 1013 will be reflected to a position away from the slope 1013, resulting in insufficient light in the slope area A3 and uneven brightness of the image.

[0067] Further referring to Figures 6b, 7b, and 8b, where the horizontal axis represents the distance from the center area of ​​the image, -100 represents the edge, and the closer to the center area is to the right, the vertical axis represents the relative brightness. From the brightness curves, it can be seen that the periphery of the ramp 1013, which is a planar shape, has more uniform light intensity, meaning the periphery image quality is more uniform. Conversely, the periphery of the ramp 1013, which is a convex or concave arc shape, has uneven light intensity, meaning the periphery image quality is uneven. Therefore, the edge dark frame effect of the ramp 1013, which is a planar shape, is better than that of the ramp 1013, which is a convex or concave arc shape. Therefore, the surface of the ramp 1013 closest to the diffuser plate 105 is preferably a planar shape.

[0068] Figure 10a is a schematic diagram showing an angle b1 of 140 degrees between the ramp 1013 and the second plate 1012 according to some embodiments of the present disclosure. Figure 10b is a brightness curve corresponding to an angle b1 of 140 degrees between the ramp 1013 and the second plate 1012 according to some embodiments of the present disclosure. Figure 11a is a schematic diagram showing an angle b2 of 120 degrees between the ramp 1013 and the second plate 1012 according to some embodiments of the present disclosure. Figure 11b is a brightness curve corresponding to an angle b2 of 120 degrees between the ramp 1013 and the second plate 1012 according to some embodiments of the present disclosure. Figure 12a is a schematic diagram showing an angle b3 of 100 degrees between the ramp 1013 and the second plate 1012 according to some embodiments of the present disclosure. Figure 12b is a brightness curve corresponding to an angle b3 of 100 degrees between the ramp 1013 and the second plate 1012 according to some embodiments of the present disclosure.

[0069] As can be seen from Figures 10b, 11b, and 12b, the smaller the angle between the ramp body 1013 and the second plate body 1012, the better the edge dark frame effect.

[0070] In some embodiments of this disclosure, the surface of the ramp 1013 near the diffuser plate 105 is a plane, and the angle between the ramp 1013 and the second plate 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 metal die stamping, the large ramp angle (complementary to the angle between the ramp 1013 and the second plate 1012) will make it difficult to form the back plate 101, which is not conducive to mass production. In conjunction with the product forming process, the preferred ramp angle range is greater than or equal to 45 degrees and less than or equal to 70 degrees, that is, the angle between the ramp 1013 and the second plate 1012 is greater than or equal to 110 degrees and less than or equal to 135 degrees. If the back plate 101 is formed by non-stamping metal (e.g., aluminum profile extrusion) or by injection molding of plastic material, where the slope angle is not affected by the forming method, the preferred slope angle range is 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 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 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 1012 can be any value among 90 degrees, 100 degrees, 110 degrees, 120 degrees, and 135 degrees.

[0071] Figure 13 is a brightness curve diagram corresponding to the equidistant arrangement of light sources 102 according to some embodiments of the present disclosure. Figure 14a is a schematic diagram of the light source array arrangement according to some embodiments of the present disclosure. Figures 14b, 14c, and 14d are schematic diagrams of the non-equidistant arrangement of light sources 102 along the C-C', D-D', and E-E' directions in Figure 14a, respectively, according to some embodiments of the present disclosure. Figure 14e is a brightness curve diagram corresponding to the non-equidistant arrangement of light sources 102 according to some embodiments of the present disclosure.

[0072] In some embodiments of this disclosure, referring to FIG4, 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.

[0073] As shown in Figures 4 and 13, the non-edge areas of the backlight module 100 are illuminated by light from multiple light sources 102, resulting in higher brightness. However, the edge areas are illuminated only by the light from the outermost light source 102, leading to lower brightness and a darker edge appearance. Furthermore, near the slope area A3, the light emitted by the second point light source 1022, which is closest to slope A3, is reflected off the slope body 1013 and directed away from slope A3. Therefore, the brightness of the slope area A3 is lower than that of the non-edge areas, causing it to appear dark.

[0074] In some embodiments of this 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 of the middle frame 106 is also a sloped surface. The light emitted by the light source 102 in the edge area is reflected to the area away from the middle frame 106 after it hits the middle frame 106. When the middle frame 106 does not overlap with the first light mixing area A1 (as shown in Figure 5e, the first light mixing area A1 is located in the middle area of ​​the image, and the second light mixing area A2 is set 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 1013. Therefore, the multiple first point light sources 1021 are evenly distributed, making the brightness in the first light mixing area A1 uniform.

[0075] When the middle frame 106 overlaps with the first light mixing area A1 (as shown in Figures 5a to 5d), the first light mixing area A1 includes a first edge area A11 and a first intermediate 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. The distribution density of the first point light source 1021 located in the first edge area A11 is greater than the distribution density of the first point light source 1021 located in the first intermediate area A12. By setting the distribution density of the first point light source 1021 located in the first edge area A11 to be greater than the distribution density of the first point light source 1021 located in the first intermediate area A12, the phenomenon of the first edge area A11 being dark can be improved.

[0076] As shown in Figures 5a to 5e, the second mixing area A2 includes a second edge region A21, a third edge region A22, and a second intermediate region A23 located between the second edge region A21 and the third edge region A22. The middle frame 106 overlaps with the second edge region A21, and the slope region A3 overlaps with the third edge region A22. The distribution density of the second point light source 1022 in the second edge region A21 and the distribution density of the second point light source 1022 in the third edge region A22 are both greater than the distribution density of the second point light source 1022 in the second intermediate region A23. By setting the distribution density of the second point light source 1022 in the second edge region A21 and the distribution density of the second point light source 1022 in the third edge region A22 to be greater than the distribution density of the second point light source 1022 in the second intermediate region A23, the darkening phenomenon of the second edge region A21 and the third edge region A22 can be improved.

[0077] Referring to Figures 14a to 14d, in some embodiments of this disclosure, the backlight module 100 includes a light source setting area Z1 corresponding to the display area of ​​the display panel 200. Light sources 102 are arranged in an array within the light source setting area Z1. Figure 14b is specifically a schematic diagram of the arrangement of light sources 102 in a cross-sectional view of the display module along the C-C' direction in Figure 14a. The first point light source 1021 has n rows, the second point light source 1022 has m rows, d1 is the minimum distance between the first point light source 1021 in the first row 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 row and the first point light source 1021 in the first row, and so on up to dn. c1 is the minimum distance between the second point light source 1022 in the first row and the edge of the light source setting area Z1, c2 is the minimum distance between the second point light source 1022 in the second row and the second point light source 1022 in the first row, and so on up to cm. c(m+1) is the minimum distance between the second point light source 1022 in the m-th row and the top of the slope 1013, and d(n+1) is the minimum distance between the first point light source 1021 in the n-th row and the second point light source 1022 in the m-th row.

[0078] Figure 14c is a schematic diagram of the arrangement of light sources 102 in a cross-sectional view of the display module along the D-D' direction in Figure 14a. The first point light source 1021 has (2s-2) columns. d1 is the minimum distance between the first column of the first point light source 1021 and the edge of the light source setting area Z1. d2 is the minimum distance between the second column of the first point light source 1021 and the first column of the first point light source 1021, and so on up to ds.

[0079] Figure 14d is a schematic diagram of the arrangement of light sources 102 in a cross-sectional view of the display module along the E-E' direction in Figure 14a. The second point light sources 1022 have (2w-2) columns. c1 is the minimum distance between the first column of second point light sources 1022 and the edge of the light source setting area Z1, c2 is the minimum distance between the second column of second point light sources 1022 and the first column of second point light sources 1022, and so on up to cw. Here, 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.

[0080] In some embodiments of this disclosure, the minimum distance between the first row of first point light sources 1021 near the middle frame 106 and the edge of the light source setting area Z1, and the minimum distance between the first column of first point light sources 1021 near the middle frame 106 and the edge of the light source setting area Z1 are the first value d1; the minimum distance between the second row of first point light sources 1021 near the middle frame 106 and the first row of first point light sources 1021 near the middle frame 106, and the minimum distance between the second column of first point light sources 1021 near the middle frame 106 and the first column of first point light sources 1021 near the middle frame 106 are the second value d2; the point light sources located between the second row of first point light sources 1021 near the middle frame 106 and the first row of second point light sources 1022 near the slope area A3, and located between the two second column of first point light sources 1021 near the middle frame 106, are equally spaced, and the distance between the equally spaced points 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.

[0081] It is understood that by making d1 < d2 ≤ d3, that is, by making the spacing of the first point light source 1021 near the edge smaller, the brightness of the edge area can be increased and the phenomenon of edge darkening can be improved.

[0082] In some embodiments of this disclosure, the minimum distance between the first row of second point light sources 1022 near the middle frame 106 and the edge of the light source setting area Z1, and the minimum distance between the first column of second point light sources 1022 near the middle frame 106 and the edge of the light source setting area Z1 are a fourth value c1; the minimum distance between the second row of second point light sources 1022 near the middle frame 106 and the first row of second point light sources 1022 near the middle frame 106, and the minimum distance between the second column of second point light sources 1022 near the middle frame 106 and the first column of second point light sources 1022 near the middle frame 106 are a fifth value c2; the orthographic projection of the first row of second point light sources 1022 near the slope area A3 on the diffuser plate 105 and the top of the slope body 1013 on the diffuser plate 105 are... The distance between the orthographic projections on 05 is the seventh value c(m+1); the distance between the second point light source 1022 in the second row near the slope area A3 and the second point light source 1022 in the first row near the slope area A3 is the eighth value cm; the point light sources located between the second point light source 1022 in the second row near the slope area A3 and the second point light source 1022 in the second row near the middle frame 106, and located between the two second point light sources 1022 in the second column near the middle frame 106, are equally spaced, and the distance between the equally spaced point light sources 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).

[0083] It is understood that by making c1<c2≤c3 and c(m+1)<cm≤c(m-1), that is, by making the spacing between the second point light source 1022 near the edge area and near the slope area A3 smaller, the brightness of the edge area and the slope area A3 can be increased, thus improving the phenomenon of the edge area and the slope area A3 being dark.

[0084] Comparing Figures 13 and 14e, it can be seen that when the light sources 102 are arranged at equal intervals, dark areas will be formed at the edges of the screen. When the light sources 102 are not arranged at equal intervals, the dark areas of the screen can be eliminated, making the light transition at the edges of the display device more uniform and improving the edge image quality.

[0085] In some embodiments of this 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; and 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.

[0086] It should be noted that the spacing of the first point light source 1021 in the first mixing zone A1 is set as d1 < d2 ≤ d3 = d4 = ... = dn = d(n+1), d1 < d2 ≤ d3 = d4 = ... = ds, where d1 = (1 / 2 ~ 2 / 3) * d2 yields the best effect. The spacing of the second point light source 1022 in the second mixing zone A2 is set as c1 < c2 ≤ c3 = c4 = ... = c(m-1), c1 < c2 ≤ c3 = c4 = ... = cw, where c1 = (1 / 2 ~ 2 / 3) * c2 yields the best effect; near the slope zone A3, the spacing of the second point light source 1022 is set as c(m+1) < cm ≤ c(m-1), where c(m+1) = (1 / 2 ~ 2 / 3) * cm yields the best effect.

[0087] Referring again to FIG14b, in some embodiments of this disclosure, the distance between the orthographic projection of the first point light source 1021 in the first row near the slope area A3 on the diffuser plate 105 and the orthographic projection of the bottom of the slope body 1013 on the diffuser plate 105 is the ninth value dv; the seventh value c(m+1) is greater than or equal to the ninth value dv.

[0088] 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.

[0089] Figure 15 is a schematic diagram of the driving setup of the light source 102 according to some embodiments of the present disclosure. Figure 16 is a schematic diagram of the driving control of the light source 102 according to some embodiments of the present disclosure.

[0090] Referring to Figure 16, in some embodiments, the light source 102 is driven by the power supply board 300. Specifically, multiple light sources 102 located in the same row form a light strip, and the power supply board 300 can drive each light strip individually.

[0091] In some embodiments of this 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 of the middle frame 106 is also a sloping surface, and the light emitted by the light source 102 in the edge area will be reflected after shining on the middle frame 106. When the middle frame 106 does not overlap with the first light mixing area A1 (as shown in Figure 5e, the first light mixing area A1 is located in the middle area of ​​the image, and the second light mixing area A2 is set 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 sloping body 1013. Therefore, the driving power of the multiple light strips where the first point light sources 1021 are located is equal, so that the brightness in the first light mixing area A1 is uniform.

[0092] Referring to Figures 15, 5a to 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 intermediate 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. 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 intermediate 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 intermediate area A12, the phenomenon of edge brightening caused by the enhanced reflection of the inner surface of the middle frame 106 can be improved.

[0093] Referring to Figures 15, 5a to 5e, the second mixing zone A2 includes a second edge region A21, a third edge region A22, and a second intermediate region A23 located between the second edge region A21 and the third edge region A22. The middle frame 106 overlaps with the second edge region A21, and the ramp region A3 overlaps with the third edge region A22. The driving power of the second point light source 1022 in the second edge region A21 and the driving power of the second point light source 1022 in the third edge region A22 are both less than the driving power of the second point light source 1022 in the second intermediate region A23. By setting the driving power of the second point light source 1022 in the second edge region A21 and the driving power of the second point light source 1022 in the third edge region A22 to be less than the driving power of the second point light source 1022 in the second intermediate region A23, the phenomenon of brightening of the image caused by reflection from the inner side of the middle frame 106 in the second edge region A21 and by reflection from the surface of the ramp body 1013 in the third edge region A22 can be improved.

[0094] Referring to Figures 14a to 14d and Figure 15, in some embodiments of this disclosure, the backlight module 100 includes a light source setting area Z1 corresponding to the display area of ​​the display panel 200, and light sources 102 are arranged in an array within the light source setting area Z1; the driving power of the first row of first point light sources 1021 near the middle frame 106 is a first power P1; the driving power of the second row of first point light sources 1021 near the middle frame 106 is a second power P2; the driving power of the first point light sources 1021 located between the second row of first point light sources 1021 near the middle frame 106 and the ramp area A3 is a third power P3 (i.e., the rated power of the first point light sources 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 sources 1021, and the first power P1 is less than the rated power of the first point light sources 1021.

[0095] It is 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 near the middle frame 106 is smaller, the luminous brightness of the first point light source 1021 near the middle frame 106 can be reduced, and the phenomenon of bright screen caused by enhanced reflection on the inner side of the middle frame 106 can be improved.

[0096] In some embodiments of this disclosure, the driving power of the second point light source 1022 in the first row near the middle frame 106 is the fourth power P4; the driving power of the second point light source 1022 in the second row near the middle frame 106 is the fifth power P5; the driving power of the second point light source 1022 in the first row near the slope area A3 is the fourth power P4; the driving power of the second point light source 1022 in the second row near the slope area A3 is the fifth power P5; the driving power of the second point light source 1022 located between the second point light source 1022 in the second row near the slope area A3 and the second point light source 1022 in the second row near the middle frame 106 is 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.

[0097] It is 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 ramp area A3 is smaller, the brightness of the second point light source 1022 near the middle frame 106 and near the ramp body 1013 can be reduced, thereby improving the phenomenon of screen brightness caused by enhanced reflection on the inner side of the middle frame 106 and the surface of the ramp body 1013.

[0098] In some embodiments of this 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; and 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 this disclosure are not limited thereto, and the specific power values ​​can be adjusted and set according to the initial uniformity of the image.

[0099] In some embodiments of this 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 of the first mixing distance to the brightness of the second mixing distance is a second ratio; the ratio of the reflected brightness to the refracted brightness is a third ratio; and 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.

[0100] It is understandable that the power of light source 102 is inversely proportional to its brightness; that is, the greater the brightness of light source 102, the brighter the image, and the corresponding driving power can be set to be smaller to improve the brightness uniformity of the image. 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.

[0101] 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 mixing zone 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 mixing zone A2.

[0102] Where M is the mixing distance difference coefficient, M = first mixing distance brightness / second mixing distance brightness. For example, the first mixing distance brightness refers to the brightness of the light emitted by the first point light source 1021 at a mixing distance of the first mixing zone A1, and the second mixing distance brightness refers to the brightness of the light emitted by the first point light source 1021 at a mixing distance of the second mixing zone A2. As another example, the first mixing distance brightness refers to the brightness of the light emitted by the first point light source 1021 after passing through the reflective lens 1031 at a mixing distance of the first mixing zone A1, and the second mixing distance brightness refers to the brightness of the light emitted by the same first point light source 1021 after passing through the same reflective lens 1031 at a mixing distance of the second mixing zone A2. In other words, the first mixing distance brightness and the second mixing distance brightness represent the brightness measured at two different mixing distances when only the mixing distance differs while other factors remain the same.

[0103] Where N is the lens difference coefficient, N = reflected brightness / refractive brightness. For example, reflected brightness refers to the brightness measured after the light emitted from the first point light source 1021 passes through the reflective lens 1031, and refractive brightness refers to the brightness measured after the light emitted from the same first point light source 1021 passes through the refractive lens 1032. As another example, reflected brightness refers to the brightness measured at a mixing distance of the first mixing zone A1 after the light emitted from the first point light source 1021 passes through the reflective lens 1031, and refractive brightness refers to the brightness measured at a mixing distance of the first mixing zone A1 after the light emitted from the same first point light source 1021 passes through the refractive lens 1032. In other words, reflected brightness and refractive brightness represent the brightness measured for two different lenses when only the lens factor differs and all other factors are the same. In some embodiments of this disclosure, the third ratio is greater than or equal to 5 / 6 and less than or equal to 10 / 11.

[0104] It is understood that this embodiment can improve the brightness difference of the display screen caused by the brightness difference of the light source 102, the light mixing distance difference, and the lens difference 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.

[0105] Referring to FIG16, in some embodiments of this 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 the n+mth light strips.

[0106] In some embodiments of this disclosure, the light source 102 operates in local dimming mode. When the power board 300 is powered on, the code stored in the central processing unit 301 (MCU) initializes and configures each light source driver module 302, with specific power configuration values ​​set according to the aforementioned drive power ratio. Furthermore, during use, the MCU can receive local dimming data in real time and adjust the light strip power accordingly based on the brightness of the displayed image to reduce overall power consumption.

[0107] In some embodiments of this disclosure, the light source 102 is in a mode without local dimming. When the power board 300 is powered on, the light source driving module 302 can be directly controlled by the boost circuit to output the power supply voltage of the light strip, and the output current value can be configured through the resistor (Iset resistor) in the boost circuit. The specific power configuration value is set according to the aforementioned driving power ratio.

[0108] In some embodiments of this 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 among 0.5, 1, 2, 2.5, and 3. Alternatively, 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 among 0, 5, 0.75, 1, 1.25, and 1.5.

[0109] In some embodiments of this 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 among 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 among 50 mm, 70 mm, 90 mm, 110 mm, and 120 mm. It is understood that the distribution density of the first point light sources 1021 can be determined based on the distance between two adjacent first point light sources 1021; the distribution density of the second point light sources 1022 can be determined based on the distance between two adjacent second point light sources 1022. The number of first point light sources 1021 and second point light sources 1022 can be determined based on the display area size of the display module, the distribution density of the first point light sources 1021, and the distribution density of the second point light sources 1022.

[0110] Figure 17 is a structural schematic diagram of the reflective film 104 according to some embodiments of the present disclosure. Figures 18a and 18b are schematic diagrams of the relative positional relationship between the reflective lens 1031 and the first hole 141 and the refractive lens 1032 and the second hole 142, respectively, according to some embodiments of the present disclosure. Figure 19 is a partial structural schematic diagram of the sub-absorbing point 1042 according to some embodiments of the present disclosure. Figure 20 is a schematic diagram of the edge structure of the reflective film 104 according to some embodiments of the present disclosure. Figure 21 is a partial structural schematic diagram of the first through hole 1043 according to some embodiments of the present disclosure. Figure 22 is a partial structural schematic diagram of the reflective film 104 according to some embodiments of the present disclosure.

[0111] Referring to Figures 17, 18a, and 18b, in some embodiments of this disclosure, the plurality of clearance 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 is used to expose 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 is used to expose the second point light source 1022 and the refractive lens 1032. The orthographic projection of the reflective lens 1031 on the back plate 101 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.

[0112] It is understandable that, since the reflective lens 1031 has high requirements for the flatness of the reflective film 104, this embodiment achieves engagement between the reflective film 104 and the reflective lens 1031 by overlapping the orthographic projection of the reflective lens 1031 on the back plate 101 with the orthographic projection of the first hole 141 on the back plate 101. Specifically, in some embodiments of this 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, pressing the portion of the reflective film 104 that overlaps with the orthographic projection area of ​​the reflective lens 1031 between the base and the back plate 101, thereby achieving engagement between the reflective film 104 and the reflective lens 1031, can improve the flatness of the reflective film 104 and prevent local warping of the reflective film 104.

[0113] In some embodiments of this disclosure, the orthographic projection of the reflective lens 1031 onto the back plate 101 is 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 orthographic projection of the refractive lens 1032 onto the back plate 101 is circular, and the diameter L4 of the second hole 142 is greater than the diameter L5 of the circle.

[0114] In some embodiments of this 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 among 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 among 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 among 0.5 mm, 0.7 mm, 0.9 mm, 1.1 mm, and 1.5 mm.

[0115] Referring to Figures 17, 19, and 20, in some embodiments of this disclosure, the backlight module further includes a dotted line 1044 located on the reflective film 104 at the boundary between the first mixing region A1 and the ramp region A3, and / or, the dotted line 1044 located on the reflective film 104 at the boundary between the second mixing region A2 and the ramp region A3. Referring to Figure 22, when the number of ramp regions A3 is greater than 1, a dotted line 1044 is also provided on the reflective film 104 at the boundary between two adjacent ramp regions A3.

[0116] It is understood that, in this embodiment, by setting dotted lines 1044 on the reflective film 104 at the boundary line between the first light mixing zone A1 and the slope zone A3, the boundary line between the second light mixing zone A2 and the slope zone A3, and the boundary line between two adjacent slope zones A3, it is possible to prevent the reflective film 104 from bulging when folding.

[0117] In some embodiments of this disclosure, the backlight module further includes a plurality of light-extinguishing structures 42, which are located on the side of the reflective film 104 in the slope region A3 near the diffuser plate 105 or on the reflective film 104 in the slope region A3.

[0118] In some embodiments of this disclosure, the extinction structure 42 includes a sub-absorption point 1042 located on the side surface of the reflective film 104 in the slope region A3 near the diffuser plate 105; or, the extinction structure 42 includes a first through hole 1043 located on the reflective film 104 in the slope region A3.

[0119] It is understandable that the light emitted from the second point light source 1022 enters the slope area A3 after passing through the refractive lens 1032, forming a bright area and affecting the brightness uniformity of the image. In this embodiment, by providing sub-absorbent points 1042 or first through holes 1043 on the reflective film 104 of the slope area A3, the reflected light in the slope area A3 is reduced, thereby lowering the brightness of the bright area and improving the brightening phenomenon of the slope area A3.

[0120] In some embodiments of this disclosure, the material of the matte structure 42 includes black ink and / or white ink, wherein 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.

[0121] It is understood that the matting structure 42 can be made of light-absorbing ink. Since black ink and white ink have different light absorption capabilities (black ink has a greater light absorption capability than white ink), the light absorption performance of different areas can be controlled by adjusting the ratio of the two inks. For example, more black ink can be used in areas with higher reflectivity, and more white ink can be used in areas with lower reflectivity. In other embodiments, all ink can be black, and the light absorption performance of different areas can be controlled by controlling the size and distribution density of the black ink.

[0122] In some embodiments of this disclosure, the distribution density of the extinction structure 42 located on the side of the slope region A3 near the second mixing region A2 in the direction from the top to the bottom of the slope 1013 is greater than the distribution density of the extinction structure 42 located on the side of the slope region A3 near the first mixing region A1 in the direction from the bottom to the top of the slope 1013; and / or, the projected area of ​​the extinction structure 42 located on the side of the slope region A3 near the second mixing region A2 in the direction from the top to the bottom of the slope 1013 on the back plate 101 is greater than the projected area of ​​the extinction structure 42 located on the side of the slope region A3 near the first mixing region A1 in the direction from the bottom to the top of the slope 1013 on the back plate 101.

[0123] It is understandable that, since the light emitted by the second point light source 1022 has a greater light intensity at large angles and a smaller light intensity at small angles after passing through the refractive lens 1032, the light intensity entering the lower end of the slope 1013 is strong, forming a bright area, while the light intensity entering the upper end of the slope 1013 is weak, forming a secondary bright area. Accordingly, in this embodiment, by making the distribution density of the extinction structure 42 located on the side (brightening area) of the slope area A3 near the second mixing area A2 greater than the distribution density of the extinction structure 42 located on the side (secondary brightening area) of the slope area A3 near the first mixing area A1; and / or, making the projected area of ​​the extinction structure 42 located on the side (brightening area) of the slope area A3 near the second mixing area A2 on the back plate 101 greater than the projected area of ​​the extinction structure 42 located on the side (secondary brightening area) of the slope area A3 near the first mixing area A1 on the back plate 101, the brightening phenomenon in different areas of the slope area A3 can be improved to varying degrees, making the brightness of the slope area A3 more uniform.

[0124] It should be noted that the projected area of ​​the matting structure 42 located on the side of the slope area A3 near the second mixing area A2 (the bright area) on the back plate 101 refers to the sum of the projected areas of multiple matting structures 42 located in the bright area on the back plate 101. The projected area of ​​the matting structure 42 located on the side of the slope area A3 near the first mixing area A1 (the secondary bright area) on the back plate 101 refers to the sum of the projected areas of multiple matting structures 42 located in the secondary bright area on the back plate 101.

[0125] In some embodiments, the projected area of ​​a single extinction structure 42 located in the bright region on the back plate 101 is less than or equal to the projected area of ​​a single extinction structure 42 located in the secondary bright region on the back plate 101, and the distribution density of the plurality of extinction structures 42 located in the bright region is greater than the distribution density of the plurality of extinction structures 42 located in the secondary bright region, such that the sum of the projected areas of the plurality of extinction structures 42 located in the bright region on the back plate 101 is greater than the sum of the projected areas of the plurality of extinction structures 42 located in the secondary bright region on the back plate 101.

[0126] In some embodiments, the projected area of ​​a single matting structure 42 located in the bright region on the back plate 101 is greater than the projected area of ​​a single matting structure 42 located in the secondary bright region on the back plate 101, such that the sum of the projected areas of the plurality of matting structures 42 located in the bright region on the back plate 101 is greater than the sum of the projected areas of the plurality of matting structures 42 located in the secondary bright region on the back plate 101.

[0127] In some embodiments of this disclosure, the projection shape of the matting structure 42 on the back plate 101 includes one or more of the following: circular, elliptical, rectangular, and triangular. The embodiments of this disclosure are not limited thereto. Preferably, the projection shape of the matting structure 42 on the back plate 101 is circular, which is beneficial for maintaining a uniform arrangement of the matting structures 42.

[0128] In some embodiments of this disclosure, the projection shape of the sub-absorbing point 1042 on the reflective film 104 is circular, and the diameter of the sub-absorbing point 1042 is greater than or equal to 0.5 mm and less than or equal to 3 mm, for example, any value among 0.5 mm, 1 mm, 1.5 mm, 2 mm, and 3 mm; the difference in diameter between two adjacent sub-absorbing points 1042 is greater than or equal to 0 and less than or equal to 1 mm, for example, any value among 0, 0.4 mm, 0.6 mm, 0.8 mm, and 1 mm.

[0129] In some embodiments of this 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 among 1.5 mm, 2 mm, 3 mm, 4 mm, and 5 mm; the difference in diameter between 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 among 0, 0.6 mm, 0.9 mm, 1.2 mm, and 1.5 mm.

[0130] In some embodiments of this disclosure, the distribution density of the extinction structures 42 gradually decreases from the center to the edge in the direction parallel to the boundary line between the first mixing region A1 and the slope region A3; the distribution density of the extinction structures 42 also gradually decreases along the direction from the bottom to the top of the slope body 1013. That is, the spacing between two adjacent extinction structures 42 in a row gradually increases from the center to the edge; and the spacing between two adjacent extinction structures 42 in a column gradually increases from the bottom to the top.

[0131] In some embodiments of this disclosure, in a direction parallel to the boundary line between the first light mixing region A1 and the slope region A3, the difference in distance between a sub-absorbing point 1042 and two adjacent sub-absorbing points 1042 is greater than or equal to 0 and less than or equal to 1 mm, for example, any value among 0, 0.4 mm, 0.6 mm, 0.8 mm, and 1 mm; the distance between two adjacent sub-absorbing points 1042 is greater than or equal to 2 mm and less than or equal to 10 mm, for example, any value among 2 mm, 4 mm, 6 mm, 8 mm, and 10 mm. Along the direction from the bottom to the top of the slope 1013, the difference in distance between a sub-absorption point 1042 and two adjacent sub-absorption points 1042 is greater than or equal to 0 and less than or equal to 2 mm, for example, any value among 0, 0.5 mm, 1 mm, 1.5 mm, and 2 mm; the distance between two adjacent sub-absorption points 1042 is greater than or equal to 1.5 mm and less than or equal to 10 mm, for example, any value among 1.5 mm, 4 mm, 6 mm, 8 mm, and 10 mm.

[0132] Referring to FIG19, in some embodiments of this disclosure, in the direction from the bottom to the top of the ramp 1013, the diameter of the lowest terminal light-absorbing point 1042 is 1.5 mm, the diameter difference between two adjacent rows of sub-light-absorbing points 1042 is 0.05 mm, and the diameter gradually decreases from the bottom to the top, with the diameter of the topmost sub-light-absorbing point 1042 being 1.1 mm. In the direction parallel to the boundary line between the first mixing zone A1 and the ramp zone A3, the distance between the center of the middle sub-light-absorbing point 1042 at the bottom and the center line of the ramp zone A3 is 4 mm, and the distance between two adjacent sub-light-absorbing points 1042 increases by 0.2 mm every 5 rows, and so on, gradually increasing.

[0133] Referring to Figure 20, in some embodiments of this disclosure, the number of extinction structures 42 in a row gradually decreases along the direction from the bottom to the top of the ramp 1013. It is understood that since the distribution density of the extinction structures 42 near the top of the ramp 1013 is lower (i.e., the spacing is larger), it is necessary to set the number of extinction structures 42 near the top of the ramp 1013 to be less. In some embodiments of this disclosure, along the direction from the bottom to the top of the ramp 1013, the difference in the number of extinction structures 42 between adjacent rows is greater than or equal to 2 and less than or equal to 6, that is, 1 to 3 fewer extinction structures 42 are added to the left and right sides between adjacent rows.

[0134] In some embodiments of this disclosure, the light-extinguishing structure 42 that is closest to the first light-mixing zone A1 and closest to the middle frame 106 is the first light-extinguishing structure, and the reflective lens 1031 that is closest to the middle frame 106 and closest to the first light-extinguishing structure is the first reflective lens 1410; the first light-extinguishing structure is located on the side of the first reflective lens 1410 away from the middle frame 106, and the shortest distance e1 between the first light-extinguishing structure and the 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 among 0, 0.5 mm, 1 mm, 1.5 mm, and 3 mm. The extinction structure 42, which is closest to the second light mixing zone A2 and the middle frame 106, is the second extinction structure. The refractive lens 1032, which is located in the adjacent column of the first reflective lens 1410 and is closest to the ramp zone A3, is the first refractive lens 1420. The second extinction structure is located on the side of the extension line of the first refractive lens 1420 near the middle frame 106 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 near the middle frame 106 is greater than or equal to 0 and less than or equal to 3 mm, for example, any value among 0, 0.5 mm, 1 mm, 1.5 mm, and 3 mm.

[0135] It is understandable that since there is only one light source 102 near the edge, and its brightness is low, there is no need to reduce reflection. In this embodiment, by leaving the edge area A31 of the reflective film 104 blank and not setting the extinction structure 42, the brightness of the edge area A31 can be avoided from being further reduced, thus improving the phenomenon of edge darkening.

[0136] In some embodiments of this disclosure, in a direction parallel to the boundary line between the first light mixing zone A1 and the slope zone 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 among 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 among 3 mm, 5 mm, 6 mm, 8 mm, and 10 mm. Along the direction from the bottom to the top of the slope 1013, the difference between the spacing of 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 2.5 mm, for example, any value among 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 among 2 mm, 4 mm, 6 mm, 8 mm, and 10 mm.

[0137] Referring to Figure 21, in some embodiments of this disclosure, in the direction from the bottom to the top of the ramp 1013, the diameter of the bottommost first through hole 1043 is 2.5 mm, the diameter difference between adjacent rows of first through holes 1043 is 0.2 mm, and the diameter gradually decreases from the bottom to the top, with the diameter of the topmost first through hole 1043 being 1.7 mm. In the direction parallel to the boundary line between the first mixing zone A1 and the ramp zone A3, the distance between the centers of two adjacent first through holes 1043 at the bottom middle is 5 mm, the distance between the centers of two adjacent first through holes 1043 increases by 0.5 mm every 5 rows, and so on, gradually increasing, with the distance between the centers of two adjacent first through holes 1043 in the outermost region being 6 mm. Along the direction from the bottom to the top of the slope 1013, the distance between the center of the first through hole 1043 in the first row at the bottom 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, 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 between the distances between the centers of two adjacent first through holes 1043 is 0.2 mm, and so on, gradually increasing.

[0138] Figures 23a and 23b schematically illustrate structural diagrams of display modules according to some embodiments of the present disclosure.

[0139] Referring to FIG23a, in some embodiments of this disclosure, a first reflective layer 109 is provided on the surface of the reflective film 104 located in the slope region A3 near the diffuser plate 105, and the reflectivity of the first reflective layer 109 is less than the reflectivity of the reflective film 104.

[0140] It is understandable that since the light irradiated on the slope area A3 is strong, the brightness of the slope area A3 can be adjusted by adjusting the reflectivity of the material of the reflective film 104 of the slope area A3. In this embodiment, by setting a first reflective layer 109 with a low reflectivity on the reflective film 104 of the slope area A3, the reflectivity of the slope area A3 is reduced, thus improving the phenomenon of the slope area A3 shining.

[0141] 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 light intensity in the slope area A3. Specifically, when the light intensity in the slope area A3 is strong, the reflectivity of the first reflective layer 109 is preferably between 70% and 80%; when the light intensity in the slope area A3 is weak, the reflectivity of the first reflective layer 109 is preferably between 80% and 85%. The light intensity in the slope area A3 can be judged visually. The advantage of using the first reflective layer 109 is that assembly is convenient; only a section of low-reflectivity material needs to be attached to the reflective film 104.

[0142] Referring to FIG23b, in some embodiments of this disclosure, the reflective film 104 includes a first reflective sub-film 143 located on a first plate 1011, a second reflective sub-film 144 located on a second plate 1012, and a third reflective sub-film 145 located on a ramp 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.

[0143] It is understood that in this embodiment, by making the reflectivity of the third reflective sub-film 145 of the slope region A3 less than that of the first reflective sub-film 143 and the second reflective sub-film 144, the reflectivity of the slope region A3 is reduced, thereby improving the phenomenon of the slope region A3 shining.

[0144] The installation process of the reflective film 104 in this embodiment is as follows: First, the first reflective sub-film 143 and the second reflective sub-film 144 are installed respectively. The reflectivity of the first reflective sub-film 143 and the second reflective sub-film 144 is consistent, preferably above 90%. Then, the third reflective sub-film 145 is installed in the slope area A3. 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, which makes it less likely to cause defects such as material peeling.

[0145] In some embodiments of this disclosure, the light source 102 emits blue light, and the emission wavelength of the first point light source 1021 is greater than the emission wavelength of the second point light source 1022.

[0146] It is understandable that in some embodiments, color differences may occur in the first mixing zone A1 and the second mixing zone A2 due to the different mixing distances. For example, when the light source 102 uses a blue LED and the optical film 107 uses a quantum dot film, the different excitation levels of the quantum dot film by the blue LED result in color differences in the displayed image. Specifically, in the first mixing zone A1, the blue light emitted by the first point light source 1021 has a short optical path, resulting in more transmitted blue light and a bluer color coordinate. In the second mixing zone A2, the blue light emitted by the second point light source 1022 has a long optical path, resulting in less transmitted blue light and a yellower color coordinate. 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. Specifically, a blue LED with a shorter wavelength (445-455 nm) is used in the second mixing zone A2, while a blue LED with a longer wavelength (455-465 nm) is used in the first mixing zone A1, to ensure color consistency of the displayed image.

[0147] It is understood that the embodiments of this disclosure, by setting two light mixing distances and using different lens and light source combinations, and by adjusting the light source arrangement, light source driving, light source color difference, slope structure and reflective film, ensure the brightness and color consistency of the direct-lit display device, achieve high image quality, improve user experience, and reduce packaging costs.

[0148] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this disclosure can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure can be combined or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0149] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be defined not only by the appended claims, but also by their equivalents.

Claims

1. A backlight module, wherein, The backlight module includes a first mixing area, a second mixing area, and at least one ramp area located between the first mixing area and the second mixing area. The mixing distance within the first mixing area is less than the mixing distance within the second mixing area. The backlight module further includes: The back panel includes a first plate located in the first light mixing zone, a second plate located in the second light mixing zone, and a ramp located in the ramp zone. The first plate and the second plate are arranged parallel to each other. The top of the ramp is connected to the first plate, and the bottom of the ramp is connected to the second plate. The light source includes a plurality of first point light sources located in the first mixing zone and a plurality of second point light sources located in the second mixing zone; The lens group includes a reflective lens located on the first point light source and a refractive lens located on the second point light source; A reflective film is located on the side of the back plate closest to the light source; A diffuser plate is located on the side of the lens group away from the back plate; and The middle frame is arranged around the perimeter of the back panel.

2. The backlight module according to claim 1, wherein, The surface of the ramp body near the diffuser plate is any one of a concave arc surface, a convex arc surface, or at least a section of a plane.

3. The backlight module according to claim 1, wherein, The surface of the ramp body near the diffuser plate is a flat section; and The angle between the slope and the second plate is greater than or equal to 90 degrees and less than or equal to 135 degrees.

4. The backlight module according to claim 1, wherein, 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 region and a first intermediate region located between the first edge region and the slope region. The middle frame overlaps with the first edge region. The distribution density of the first point light source located in the first edge region is greater than the distribution density of the first point light source located in the first intermediate region. The second light mixing area includes a second edge region, a third edge region, and a second intermediate region located between the second edge region and the third edge region. The middle frame overlaps with the second edge region, and the slope region overlaps with the third edge region. The distribution density of the second point light source in the second edge region and the distribution density of the second point light source in the third edge region are both greater than the distribution density of the second point light source in the second intermediate region.

5. The backlight module according to claim 1, wherein, The backlight module includes a light source setting area corresponding to the display area of ​​the display panel, and the light sources are arranged in an array within the light source setting area; The minimum distance between the first point light source in the first row near 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 near the middle frame and the edge of the light source setting area are the first values; The minimum distance between the first point light source in the second row near the middle frame and the first point light source in the first row near the middle frame, and the minimum distance between the first point light source in the second column near the middle frame and the first point light source in the first column near the middle frame are the second values; The point light sources located between the first point light source in the second row near the middle frame and the second point light source in the first row near the slope area, and located between the two first point light sources in the second column near the middle frame, are distributed at equal intervals, and the distance of the equally spaced distribution is a third value. The first value is less than the second value, and the second value is less than or equal to the third value.

6. The backlight module according to claim 5, wherein, 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, wherein, The backlight module includes a light source setting area corresponding to the display area of ​​the display panel, and the light sources are arranged in an array within the light source setting area; The minimum distance between the second point light source in the first row near 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 near the middle frame and the edge of the light source setting area are the fourth values; The minimum distance between the second point light source in the second row near the middle frame and the second point light source in the first row near the middle frame, and the minimum distance between the second point light source in the second column near the middle frame and the second point light source in the first column near the middle frame are the fifth values; The point light sources located between the second row of the second point light source near the slope area and the second row of the second point light source near the middle frame, and located between the two second columns of the second point light sources near the middle frame, are distributed at equal intervals, and the distance of the equally spaced distribution is the sixth value; The fourth value is less than the fifth value, and the fifth value is less than or equal to the sixth value.

8. The backlight module according to claim 7, wherein, The distance between the orthographic projection of the second point light source in the first row near the slope area on the diffuser plate and the orthographic projection of the top of the slope body on the diffuser plate is the seventh value; The distance between the second point light source in the second row near the slope area and the second point light source in the first row near the slope area is the eighth value; The seventh value is less than the eighth value, and the eighth value is less than or equal to the sixth value.

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

11. The backlight module according to claim 1, wherein, 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 region and a first intermediate region located between the first edge region and the slope region. The middle frame overlaps with the first edge region. The driving power of the first point light source located in the first edge region is less than the driving power of the first point light source located in the first intermediate region. as well as The second light mixing area includes a second edge region, a third edge region, and a second intermediate region located between the second edge region and the third edge region. The middle frame overlaps with the second edge region, and the ramp region overlaps with the third edge region. The driving power of the second point light source in the second edge region and the driving power of the second point light source in the third edge region are both less than the driving power of the second point light source in the second intermediate region.

12. The backlight module according to claim 1, wherein, The light source array arrangement; The driving power of the first point light source in the first row near the middle frame is the first power; The driving power of the first point light source in the second row near 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, wherein, The 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; The 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, wherein, The light source array arrangement; The driving power of the second point light source in the first row near the middle frame and the driving power of the second point light source in the first row near the slope area are the fourth power; The driving power of the second point light source in the second row near the middle frame and the driving power of the second point light source in the second row near the slope area are the fifth power; 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, wherein, The 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. The 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, wherein, The ratio of the brightness of the first point light source to the brightness of the second point light source is the first ratio value; The ratio of the brightness at the first mixing distance to the brightness at the second mixing distance is the second ratio. The ratio of reflected brightness to 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, wherein, 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, wherein, The ratio of the number of the first point light source to the number of the second point light source is greater than or equal to 0.5 and less than or equal to 3, or The ratio of the distribution density of the first point light source to the distribution density of the second point light source is greater than or equal to 0.5 and less than or equal to 1.

5.

19. The backlight module according to claim 1, wherein, 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, wherein, The reflective film has multiple clearance holes to expose the light source and the lens group. The multiple clearance 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 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, wherein, 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, wherein, The shape of the orthographic projection of the reflective lens onto the back plate is square. The width of the first hole in the first direction is greater than the side length of the square, and the width of the first hole in the second direction is less than the side length of the square. The first direction is perpendicular to the second direction. The orthographic projection of the refractive lens onto the back plate is circular, and the diameter of the second hole is larger than the diameter of the circle.

23. The backlight module according to claim 22, wherein, 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; The difference between the diameter of the second hole and the 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, wherein, The backlight module further includes a dotted line, which is located on the reflective film at the boundary between the first light mixing area and the slope area, and / or the dotted line is located on the reflective film at the boundary between the second light mixing area and the slope area.

25. The backlight module according to claim 1, wherein, The backlight module also includes multiple light-extinguishing structures, which are located on the side of the reflective film in the slope area near the diffuser plate or on the reflective film in the slope area.

26. The backlight module according to claim 25, wherein, The extinction structure includes sub-absorption points located on the surface of the reflective film in the slope region near the diffuser plate; or, The extinction structure includes a first through-hole, which is located on the reflective film in the slope region.

27. The backlight module according to claim 25, wherein, The material of the matte structure includes black ink and / or white ink, wherein 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.

28. The backlight module according to claim 25, wherein, The distribution density of the extinction structures located on the side of the slope region closer to the second mixing zone in the direction from the top to the bottom of the slope is greater than the distribution density of the extinction structures located on the side of the slope region closer to the first mixing zone in the direction from the bottom to the top of the slope; and / or, The projected area of ​​the extinction structure located on the back plate in the slope area near the second light mixing zone along the direction from the top to the bottom of the slope is greater than the projected area of ​​the extinction structure located on the back plate in the slope area near the first light mixing zone along the direction from the bottom to the top of the slope.

29. The backlight module according to claim 28, wherein, The projection shape of the matting structure on the back plate includes one or more of the following: circle, ellipse, rectangle, and triangle.

30. The backlight module according to claim 29, wherein, The extinction structure includes sub-absorbent points located on the surface of the reflective film in the slope region near the diffuser plate. The projection shape of the sub-absorbent point on the reflective film is circular. The diameter of the sub-absorbent point is greater than or equal to 0.5 mm and less than or equal to 3 mm, and the difference in diameter between two adjacent sub-absorbent 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 located on the reflective film in the slope area. The projection shape of the first through hole on the back plate is circular. 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 diameter 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, wherein, In the direction parallel to the boundary line between the first light mixing zone and the slope zone, the distribution density of the extinction structure gradually decreases from the middle to the edge; in the direction along the bottom of the slope to the top of the slope, the distribution density of the extinction structure gradually decreases.

32. The backlight module according to claim 31, wherein, The number of the extinction structures in a row gradually decreases from the bottom to the top of the slope.

33. The backlight module according to claim 32, wherein, In the direction from the bottom to the top of the slope, the difference in the number of extinction 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, wherein, The light-extinguishing structure that is closest to the first light-mixing area and closest to the middle frame is the first light-extinguishing structure, and the reflective lens that is closest to the middle frame and closest to the first light-extinguishing structure is the first reflective lens; The first light-absorbing structure is located on the side of the first reflective lens away from the middle frame; The extinction structure that is closest to the second light mixing area and closest to the middle frame is the second extinction structure, and the refractive lens that is located in an adjacent column of the first reflective lens and closest to the slope area is the first refractive lens; The second extinction structure is located on the side of the extension line of the first refractive lens near the middle frame away from the middle frame.

35. The backlight module according to claim 1, wherein, A first reflective layer is provided on the surface of the reflective film located in the slope area near the diffuser plate, and the reflectivity of the first reflective layer is less than that of the reflective film.

36. The backlight module according to claim 1, wherein, The reflective film includes a first reflective sub-film located on the first plate, a second reflective sub-film located on the second plate, and a third reflective sub-film located on the slope. The reflectivity of the first reflective sub-film is equal to the reflectivity of the second reflective sub-film and greater than the reflectivity of the third reflective sub-film.

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

38. The backlight module according to any one of claims 1-37, wherein, The second light mixing region is located on one side of the first light mixing region; or The second mixing region is located on opposite sides of the first mixing region; or The second mixing region is located on either side of the first mixing region; or The second mixing region is located on three adjacent sides of the first mixing region; or The second light mixing zone is arranged around the first light mixing zone.

39. A display module, wherein, The display module includes: The backlight module according to any one of claims 1-38; and The display panel is located on the light-emitting surface of the backlight module.

40. A display device, wherein, The display device includes: The display module according to claim 39; and The power board is located on the side of the back panel away from the display panel within the first light mixing zone.

41. The display device according to claim 40, wherein, In the light emission direction of the display module, the sum of the thickness of the power board, the distance between the power board and the first plate, and the distance between the extension lines of the power board and the second plate is the first sum value; The difference between the mixing distance in the second mixing zone and the mixing distance in the first mixing zone is approximately equal to the sum of the first mixing distances.

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