Backlight module and display device

Abstract

The utility model provides a backlight module and a display device. The backlight module at least comprises a luminous source, a light guide plate and an angle deflection film, the angle deflection film comprises a plurality of annular light-emitting surfaces, and the height of the annular light-emitting surfaces close to the center of the angle deflection film is smaller than that of the annular light-emitting surfaces away from the center of the angle deflection film. According to the utility model, through the arrangement of the angle deflection film, the light emitting part corresponding to the angle deflection film forms different annular light emitting surfaces, and the different annular light emitting surfaces have different acting effects on light rays, so that the light rays deflect towards the edge side, and finally, the light rays emitted from the angle deflection film have consistent light emitting visual angles; and the consistency of the display effect of the display device is improved.

Description

Technical Field

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

[0002] With the continuous upgrading of electronic products, people have put forward higher requirements on the quality and performance of electronic glasses to enhance the user experience.

[0003] Traditional display devices only have display functions. With the expansion of application scenarios, the frequency of use of virtual display technology (Virtual Reality, VR) is gradually increasing. When preparing VR equipment or devices, taking conventional products on the market as an example, such as VR products, VR display devices usually include a backlight module, which provides a backlight source to the optical system through the backlight module. However, when the existing backlight module provides backlight to the display screen of the VR display device, its screen generally emits light at 0° forward. With the trend of lightweight and integrated VR products, due to the reduction in screen size, the light provided by the backlight module can no longer meet the use requirements, resulting in reduced light utilization in the edge area of ​​the lens in the device, dim brightness, and more astigmatism in the edge area of ​​the lens, which leads to uneven brightness of the screen of the VR product when observed, reducing the display effect of the product.

[0004] In summary, the backlight module and the corresponding display device provided in the prior art cannot provide enough light to meet the use requirements when displaying and observing, and the technical problem of uneven screen display brightness may occur. Utility Model Content

[0005] The embodiments of the utility model provide a backlight module and a display device, so as to effectively improve the problem in the existing backlight module and display device that the light provided by the backlight module cannot meet the use requirements, thereby causing the screen to easily have uneven brightness display problem.

[0006] In order to solve the above technical problems, a first aspect of the embodiment of the utility model provides a backlight module, including:

[0007] Light source;

[0008] a light guide plate, disposed on one side of the light source; and

[0009] An angle deflection film, arranged on the light emitting side of the light guide plate;

[0010] The angle deflection film comprises a plurality of light emitting portions, each of which is provided with an annular light emitting surface inclined toward the center of the angle deflection film, and a height of the annular light emitting surface close to the center of the angle deflection film is smaller than a height away from the center of the angle deflection film.

[0011] According to an embodiment of the utility model, the centers of the plurality of annular light emitting surfaces are located on the same axis, and the annular light emitting surface and the bottom surface of the light emitting portion have a first angle;

[0012] The first angle close to the center of the angle deflection film is greater than the first angle far from the center of the angle deflection film, and the first angle is less than 45°.

[0013] According to an embodiment of the present invention, the width of the annular light emitting surface close to the center of the angle deflection film is greater than the width of the annular light emitting surface far from the center of the angle deflection film.

[0014] According to an embodiment of the present invention, the bottom surfaces of the plurality of light emitting portions are located on the same plane, and the cross-sectional shape of the light emitting portion is set to be a right triangle.

[0015] According to an embodiment of the present invention, the right triangle has a first side, a second side and a hypotenuse;

[0016] Among them, the plane corresponding to the hypotenuse is the annular light-emitting surface of the light-emitting portion, the first side edge is parallel to the bottom surface of the light-emitting portion, the second side edge is perpendicular to the bottom surface of the light-emitting portion, the heights of the second side edges corresponding to different light-emitting portions are the same, and the first side edge and the second side edge have different lengths.

[0017] According to an embodiment of the utility model, the angle deflection film further includes a supporting substrate, a plurality of light emitting portions are arranged on the supporting substrate, and the light emitting portions at least include a first light emitting portion and a second light emitting portion arranged adjacent to each other, and the first light emitting portion is arranged on a side close to the center of the angle deflection film;

[0018] The first light emitting portion has a first annular light emitting surface, the second light emitting portion has a second annular light emitting surface, and the outer diameter of the first annular light emitting surface is the same as the inner diameter of the second annular light emitting surface.

[0019] According to an embodiment of the utility model, the plurality of light sources are correspondingly arranged on the side of the light guide plate, and the light guide plate includes a plurality of light reflecting portions, and the light reflecting portions are correspondingly arranged on the bottom of the light guide plate;

[0020] Wherein, the arrangement density of the reflective parts at the edge of the light guide plate is greater than the arrangement density near the center of the light guide plate.

[0021] According to an embodiment of the utility model, the reflective portion includes a prism, and a plane where one side of the prism is located has a first angle with the bottom surface of the light guide plate;

[0022] Wherein, the second angle of the prism on a side close to the light source is smaller than the second angle on a side far from the light source.

[0023] According to an embodiment of the utility model, the backlight module further includes:

[0024] A microstructure layer, disposed on the light-emitting side of the light guide plate;

[0025] A first prism layer is disposed on a side of the microstructure layer away from the light guide plate;

[0026] A second prism layer is disposed on a side of the first prism layer away from the light guide plate;

[0027] Among them, multiple light-emitting protrusions are arranged on the upper and lower surfaces of the microstructure layer, multiple first prisms are arranged on the side of the first prism layer facing the angle deflection film, and multiple second prisms are arranged on the side of the second prism layer facing the angle deflection film.

[0028] According to a second aspect of the embodiment of the utility model, a display device is further provided. The display device includes a display panel and a backlight module provided in the embodiment of the utility model.

[0029] Beneficial effects of the embodiments of the utility model: Compared with the prior art, the embodiments of the utility model provide a backlight module and a display device. The backlight module at least includes a light source, a light guide plate and an angle deflection film, and the angle deflection film includes a plurality of annular light emitting surfaces, and the height of the annular light emitting surface close to the center of the angle deflection film is less than the height away from the center of the angle deflection film. In the utility model, by setting the angle deflection film, a plurality of light emitting parts form different annular light emitting surfaces, and different annular light emitting surfaces have different effects on the light, so that the light is deflected to the edge side, and finally ensures that the light emitted from the angle deflection film has a consistent light emitting viewing angle, thereby improving the consistency of the display effect of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the film structure of the backlight module provided in an embodiment of the utility model;

[0032] Figure 2 It is a schematic structural diagram of the angle deflection membrane provided in an embodiment of the utility model;

[0033] Figure 3 Provided in the embodiment of the present utility model Figure 2 Schematic cross-sectional view of the angle deflection membrane in FIG.

[0034] Figure 4 A schematic plan view of a portion of the light emitting portion provided in an embodiment of the utility model;

[0035] Figure 5-Figure 6 It is a schematic diagram of the structure of different light guide plates provided in the embodiments of the utility model;

[0036] Figure 7 It is a plan view of the reflective portion of the light guide plate described in the embodiment of the utility model;

[0037] Figure 8 It is a schematic diagram of the film layer of the microstructure layer provided in the embodiment of the present utility model. DETAILED DESCRIPTION

[0038] In the following detailed description, only certain embodiments of the present invention are shown and described simply by way of illustration. As will be appreciated by those skilled in the art, the embodiments described herein may be modified in various ways without departing from the spirit or scope of the present invention.

[0039] In the drawings, the thickness of layers, films, plates, regions, etc. may be exaggerated for clarity and for better understanding and ease of description. In addition, unless explicitly described to the contrary, the word "include" and its variations like "include" or "contain" will be understood to imply the inclusion of the discussed elements, but not necessarily exclude other elements. Further, in the specification, the word "on..." refers to placement above or below an object part, and does not necessarily mean placement on the upper side of the object part based on the direction of gravity.

[0040] It will be understood that although the terms "first", "second", etc. may be used herein to describe various components, these components should not be limited by these terms. These components are only used to distinguish one component from another component.

[0041] When setting up a backlight module and a corresponding display device, the backlight module is used to provide a backlight source to the device. Therefore, the light effect provided by the backlight source will directly affect the display effect of the device. Especially for VR display devices, the light source provided by the backlight module has a greater impact on the display effect of the product.

[0042] The utility model provides a backlight module and a display device in an embodiment, which improves the light emission effect by changing the film layer structure in the backlight module, avoids the display problem of uneven brightness in different areas of the screen, and effectively ensures that the light emitted from the backlight module has high consistency.

[0043] like Figure 1 As shown, Figure 1 The backlight module in the embodiment of the utility model comprises: a reflector 101 , a light guide plate 102 , a light source 107 , a microstructure layer 103 , a first prism layer 104 , a second prism layer 105 and an angle deflection film 106 .

[0044] Specifically, in the embodiment of the present invention, when describing the backlight module, a side-entry backlight module is used as an example, wherein a plurality of light sources 107 are arranged on one side of the light guide plate 102, as shown in FIG. Figure 1 In the structure, multiple light sources 107 can be arranged in an array on the side of one side of the light guide plate 102, such as being arranged in multiple rows or columns, and the light sources 107 can be arranged according to the required light source intensity and quantity. Further, when the backlight module is set as a direct-down module structure, although the setting positions of the light sources 107 are different, after the action of the light guide plate, they will form light that is transmitted to the light-emitting side, and the light-emitting effect formed can also meet the use requirements. Therefore, other types and modes of backlight module structures are all within the protection scope of the embodiments of the utility model.

[0045] In the embodiment of the utility model, the light guide plate 102 is arranged on the reflective sheet 101, and the reflective sheet 101 can be set as a film layer with a reflective effect, such as a mirror layer or other metal layer that can reflect light. After passing through the light guide plate 102, the excess light propagates to the light guide plate 102, is reflected again by the light guide plate 102, and re-enters the light guide plate, and is emitted from the light emitting side again. Therefore, the reflective sheet 101 reduces the problem of light damage in the module.

[0046] Furthermore, the light source 107 is arranged on one side or at least one side of the light guide plate 102, and can be set according to different needs of products or customers. Different arrangements and structures of the light source are all within the protection scope of the present utility model, and the light source 107 can be set to a light-emitting diode, a micro light-emitting diode, or other light-emitting elements that can actively emit light.

[0047] In an embodiment of the utility model, the microstructure layer 103 is arranged on a side of the light guide plate 102 away from the reflective sheet 101, and the first prism layer 104 is arranged on a side of the microstructure layer 103 away from the light guide plate 102, and the second prism layer 105, the second prism layer 105 is arranged on a side of the first prism layer 104 away from the light guide plate, and in an embodiment of the utility model, the angle deflection film 106 is arranged on a side of the second prism layer 105 away from the light guide plate 102.

[0048] When the light source 107 emits light, the light enters the light guide plate 102. After being acted upon by the light guide plate 102, most of the light is emitted into other film layers from the light emitting side of the light guide plate, and in the light emitting direction, it successively enters the micro-luminescent structure layer 103, the first prism layer 104, the second prism layer 105 and the angle deflection film 106, and is acted upon by the above-mentioned different film layers respectively, and finally is emitted from one side of the angle deflection film 106 and enters the display panel or other functional layers.

[0049] In the embodiment of the utility model, since the above-mentioned different film layers have different structures and different structures will produce different effects on light, the light emitted from the light-emitting side of the angle deflection film 106 ultimately has consistent light intensity at different positions, thereby ensuring the display effect of the display device.

[0050] like Figure 2 As shown, Figure 2 It is a schematic diagram of the structure of the angle deflection film provided in the embodiment of the present utility model. When setting the angle deflection film 106, the backlight module in the embodiment of the present utility model is applied to VR wearable devices, such as VR glasses, and VR glasses are usually set to a circular shape, so as to conform to ergonomic design. Therefore, in the following embodiments, the range of the outgoing light provided by the backlight module is also described by taking the circle as an example. That is, in the light emitting direction, the light eventually passes through the angle deflection film and is emitted to the outside world. Therefore, the shape of the angle deflection film directly determines the range of action of the outgoing light. In the embodiment of the present utility model, the planar top view shape of the angle deflection film is described by taking the circle as an example. Optionally, the structures of angle deflection films of other shapes are all within the protection scope of the present utility model. For example, changing the circle in the present utility model to a rectangle or other structures is all within the protection scope of the present utility model.

[0051] Specifically, the angle deflection film 106 has an axis O1O2, the axis O1O2 passes through the center of the angle deflection film 106, and the direction of the axis from O1 to O2 is the light emitting direction. In the embodiment of the utility model, the angle deflection film 106 includes a plurality of light emitting portions 06. Each light emitting portion 06 is provided with an annular light emitting surface 062.

[0052] In the embodiment of the utility model, when the light emitting portion 06 and its corresponding annular light emitting surface 062 are arranged, each light emitting portion 06 is arranged in sequence from the center of the axis O1O2 to the edges of the angle deflection film, and each light emitting portion 06 is arranged at the same height.

[0053] See Figure 2In the structure of the present invention, the height of the annular light emitting surface 062 close to the axis of the angle deflection film 106 is smaller than the height away from the axis of the angle deflection film, that is, the annular light emitting surface 06 is inclined relative to the bottom surface of the angle deflection film 106, and the annular light emitting surface 062 is symmetrically arranged relative to the central axis O1O2 of the angle deflection film 106.

[0054] Further, such as Figure 3 As shown, Figure 3 Provided in the embodiment of the present utility model Figure 2 A schematic cross-sectional view of the angle deflection film in FIG. 1 is shown in FIG. 1 , wherein a plurality of light emitting portions 06 are sequentially arranged along the center of the axis O1O2 toward the edge of the angle deflection film 106 .

[0055] Combination Figure 2-Figure 3 In the embodiment of the utility model, the angle deflection film 106 further includes a supporting base 08, and the supporting base 08 is arranged on a side close to the light guide plate, and a plurality of light emitting portions 06 are arranged on a side of the supporting base 08 away from the light guide plate. In the embodiment of the utility model, the supporting base 08 can be arranged as a circular platform, and the bottom surface of each light emitting portion 06 is arranged on the upper surface of the supporting base 08, that is, the bottom surfaces of each light emitting portion are located on the same plane. In this way, on the one hand, the supporting base 08 is used to support the light emitting portion 06, and on the other hand, the supporting base 08 guides the light propagating from the bottom to the angle deflection film, and the light enters each light emitting portion 06 again, thereby improving the effect of the angle deflection film 106 on light.

[0056] Specifically, each light emitting portion 06 is set to the same height. That is, the height of the light emitting portion 06 is H. In the embodiment of the utility model, the height of the light emitting portion 06 is the vertical distance between the highest point of the edge of each light emitting portion 06 and the bottom surface. Each light emitting portion 06 is set to the same height, thereby ensuring the adjustment and control effect of different light emitting portions on light.

[0057] Furthermore, in the embodiment of the utility model, the cross-sectional shape of the light emitting portion 06 is set to be a triangle, and can be optionally set to be a right triangle, and the right triangle is a non-isosceles right triangle.

[0058] Specifically, the triangle corresponding to the light-emitting portion 06 has a first side a, a second side b, and a hypotenuse c. The first side a and the second side b are perpendicular to each other, and the second side b is perpendicular to the bottom surface of the light-emitting portion 06. At the same time, the oblique plane corresponding to the hypotenuse c is the annular light-emitting surface 062 provided in the present invention.

[0059] In the embodiment of the present invention, the lengths of the first side a and the second side b are different: a≠b.

[0060] See Figure 3In the embodiment of the utility model, the annular light emitting surface 062 corresponding to each light emitting portion 06 is inclined toward the central axis of the angle deflection film, and there is a first angle β between each annular light emitting surface 062 and the bottom surface of the light emitting portion 06, wherein, since the upper and lower surfaces of the supporting substrate 08 of the light emitting portion 06 are arranged in parallel, at this time, the plane corresponding to the upper surface of the supporting substrate 08 is also parallel to the plane corresponding to the bottom surface of the light emitting portion 06, that is, the angle formed between the upper surface of the supporting substrate 08 and the annular light emitting surface 062 is also the first angle β.

[0061] In the embodiment of the utility model, the first angle β close to the side of the axis O1O2 is smaller than the first angle β away from the side of the axis O1O2. Wherein, the first angle β is less than 45°, such as along the edge of the angle deflection film along the axis O1O2, the first angle β corresponding to each light emitting portion 06 is 20°, 25°, 30°, 35°, and 40°, respectively. Optionally, the difference between the first angle β of two adjacent light emitting portions is less than or equal to 6°, so as to avoid the problem of uneven light intensity and distribution in different regions caused by the first angle β of the light emitting portions in two adjacent regions changing too fast.

[0062] See Figure 3 The light emitting portion 06 at least includes a first light emitting portion 1061 and a second light emitting portion 1062 which are adjacent to each other. The first light emitting portion 1061 has a first annular light emitting surface M, and the second light emitting portion 1062 has a second annular light emitting surface N.

[0063] like Figure 4 As shown, Figure 4 It is a schematic plan view of a part of the light emitting portion provided in the embodiment of the utility model. Furthermore, in the embodiment of the utility model, the plan view of the light emitting portion is a plan view of the second light emitting portion 1062, and in the plane corresponding to the supporting base 08, the projection surface corresponding to the second annular light emitting surface N of the second light emitting portion 1062 is the projection surface 063. Among them, the projection surface 063 is also a circular ring, and relative to the center O1, the inner diameter of the circular ring is R1, and the outer diameter is R2. In the embodiment of the utility model, the inner circle and the outer circle of the circular ring are respectively the vertical projections formed by the edge of the first light emitting portion 1061 and the edge of the second light emitting portion 1062. Combined with Figure 2-3 Therefore, the outer diameter of the first annular light emitting surface M is the same as the inner diameter of the second annular light emitting surface N. That is, the outer edge of one light emitting portion is connected to the inner edge of the other light emitting portion of two adjacent light emitting portions, thereby forming a plurality of light emitting portions and corresponding annular light emitting surfaces in the utility model.

[0064] See Figure 1 and Figure 4, the width of the ring corresponding to each annular light emitting surface is D, and the widths D of the rings of two adjacent annular light emitting surfaces are different, and the width of the annular light emitting surface close to the axis O1O2 is greater than the width of the annular light emitting surface away from the axis O1O2. Thus, by adjusting the widths of the annular light emitting surfaces in different areas, the light entering from the supporting base 08 has a consistent light effect after being emitted through different annular light emitting surfaces, and the consistency of the display effect of the device is ensured.

[0065] Optionally, the width D of the annular light exit surface 062 can be adjusted by changing the inner diameter and outer diameter of the corresponding ring according to the requirements of different products. This is not specifically limited here, so as to ensure that the light has a high consistency when it is emitted from different annular light exit surfaces.

[0066] See Figure 3 In the embodiment, the light LL entering from the bottom, after passing through the supporting base 08, will enter each light emitting portion 06 in turn, and will be refracted on the corresponding annular light emitting surface 062. In the embodiment of the utility model, after passing through the annular light emitting surface 062, the light LL will be deflected to the side away from the axis O1O2, thereby increasing the intensity and light output of the edge side, and effectively improving the technical problem of low edge brightness, ensuring the consistency of light emitting effects in different areas, and improving the uniformity of display effects.

[0067] like Figure 5-Figure 6 As shown, Figure 5-Figure 6 The schematic diagram of the structure of different light guide plates provided in the embodiment of the utility model is combined with Figure 1 In the structure of the utility model, when the light guide plate 102 is set, the light guide plate 102 also includes a plurality of reflective portions 1021, and the plurality of reflective portions 1021 are arranged at the bottom of the light guide plate, that is, arranged on the back side of the light guide plate 102.

[0068] When the reflective portion 1021 is provided, the reflective portion 1021 may be provided as a prism structure or a mesh structure. Figure 5 In this case, the reflective portion 1021 is set as a prism structure, so that when the light emitted by the light source 107 passes through the light guide plate 102 and is emitted downward, it will enter the light-emitting portion 1021 again, and will be reflected back into the light guide plate 102 by the edge surface of the prism structure, and continue to be emitted from the light guide plate 102, thereby effectively improving the light output intensity of the light through the reflective portion 1021.

[0069] In the embodiment of the utility model, when the reflective parts 1021 are provided, the reflective parts 1021 can be arranged in an array in the plane where the light guide plate is located, so that as much light as possible can be acted upon by the reflective parts 1021 and enter the light guide plate.

[0070] Among them, the plane opposite to one side of the reflective portion 1021 of the prism structure has a second angle α with the bottom surface of the light guide plate 102. In the embodiment of the utility model, the second angle α on the side close to the light source 107 is smaller than the second angle α on the side away from the light source 107. In this way, different angles are set at different distances from the light source 107, so as to meet the needs of light reflection at different angles and ensure that more light is reflected into the light guide plate 102. Thus, the light effect of the module is guaranteed.

[0071] Furthermore, the second angle α may be set to be 1° to 8°, such as the difference between the second angles α between two adjacent reflective portions 1021 is less than or equal to 0.5°, so that more light can be affected by the reflective portions 1021 .

[0072] See Figure 6 In the embodiment of the present invention, the reflective portion 1021 can also be set as a mesh structure. When set as a mesh structure, each mesh structure can be set to the same shape and size. And the mesh structure is evenly distributed at the bottom of the light guide plate. In the embodiment of the present invention, the mesh structure has a height f and a width g. And the outer contour surface of the mesh structure can be set as a curved surface, so that the light on the curved surface will be reflected to the inside of the light guide plate 102.

[0073] The aspect ratio of the height f and the width g of the dot structure is set to be between 0.05 and 0.08. For example, when the height g is set to 1um to 10um, the ratio of the two is 0.06. This ensures that the light can enter the light guide plate 102 under the limitation of the dot structure. And the light effect of the module is guaranteed. Optionally, the reflective portion 1021 can also be set to other shapes, such as a pyramid structure, a hemispherical structure, etc. The above structures or other shapes are all within the protection scope of the present utility model.

[0074] like Figure 7 As shown, Figure 7 Schematic diagram of the reflective portion of the light guide plate in the embodiment of the utility model. In the embodiment of the utility model, when the reflective portion 1021 is set, the arrangement density of the reflective portion 1021 at a position far from the center of the light guide plate 102 is greater than the arrangement density near the center of the light guide plate 102. In this way, the light at the edge can be more affected by the reflective portion 1021, thereby improving the light effect of the module at the edge position, and making the light effect at the edge area reach the same intensity as the light in other areas, thereby improving the uniformity of the light output of the module.

[0075] See Figure 7In the figure a, from left to right, the density of the reflective part 1021 decreases first and then increases. The density of the reflective part 1021 in the central area is the smallest, and the arrangement density at the edges on both sides is greater than the arrangement density in the central area. As shown in the figure b, with the center corresponding to the light guide plate 102 as a reference, the arrangement density of the reflective part 1021 at the edge position is greater than the arrangement density of the reflective part 1021 in the central area, thereby ensuring the consistency of the light output effect in different areas of the module.

[0076] Optionally, when setting the reflective portion 1021 in the different areas, it can be improved and adjusted according to different needs to increase its scope of use.

[0077] In the embodiment of the present utility model, when the microstructure layer 103 provided in the present utility model is provided, see Figure 8 The structure in Figure 8 Schematic diagram of the film layer of the microstructure layer provided in the embodiment of the utility model. Figure 1 In the structure, the microstructure layer 103 further includes a plurality of light emitting convex points 1031. The light emitting convex points 1031 can be arranged on at least one side of the upper surface or the lower surface of the microstructure layer 103. In this way, when light enters and exits the microstructure layer 103, it will be acted upon by the light emitting convex points 1031.

[0078] Specifically, the light emitting convex points 1031 can be arranged periodically on the microstructure layer, such as arrayed on the upper and lower surfaces of the microstructure layer 103, and the arrangement density of the light emitting convex points 1031 in different regions is the same. In the embodiment of the utility model, the light emitting convex points 1031 can be arranged as pyramids, pyramids or other structures, and the light emitting convex points 1031 of other shapes and structures are all within the protection scope of the utility model.

[0079] Furthermore, in the embodiment of the utility model, the light transmitted through the light guide plate 102 will continue to pass through the microstructure layer 103. In this way, the light guide plate 102 cooperates with the light emitting protrusions 1031 on the microstructure layer 103 to control the light emitting angle of the light emitted from the microstructure layer 103 to be within a polar angle of 60° to 70°, and the azimuth angles are 45° and -45° respectively, so that the difference in the light emitting angles of the light emitted from different areas is small, thereby ensuring the consistency of the lighting effect.

[0080] See Figure 1 In the film layer structure, in the embodiment of the utility model, when the first prism layer 104 and the second prism layer 105 of the backlight module are set, the first prism layer 104 is set on the side close to the light guide plate, and the first prism layer 104 may include a plurality of first prisms 1041, and the second prism layer 105 also includes a plurality of second prisms 1051.

[0081] The first prism 1041 and the second prism 1051 are both disposed on a side facing the angle deflection film 106 , and the first prism 1041 and the second prism 1051 extend in different directions.

[0082] Specifically, a plurality of first prisms 1041 are arranged at equal intervals on the upper surface of the first prism layer 104, a plurality of second prisms 1051 are arranged at equal intervals on the upper surface of the second prism layer 105, and the projections of the extension directions of the first prisms 1041 and the second prisms 1052 on the same plane are perpendicular to each other. That is, the first prisms 1041 and the second prisms 1051 are arranged perpendicular to each other.

[0083] Further, the first prism 1041 and the second prism 1051 are set to the same shape, such as both are set to be triangular prisms, and have the same height and prism width. Specifically, the angle between the two opposite prism faces of the first prism 1041 or the second prism 1051 and the surface of the prism layer is set to 85° to 95°, or the angle between the side prism faces of the first prism 1041 and the second prism 1051 and the surface of the prism layer is adjusted according to needs, so as to further control the emitted light.

[0084] In the embodiment of the present invention, the refractive indexes of the first prism layer 104 and the second prism layer 105 are set to 1.55-1.67, such as the refractive indexes of the two different prism layers are both set to 1.60, thereby improving the emission effect of the emitted light.

[0085] When light passes through the first prism layer 104 and the second prism layer 105 in sequence, by adjusting the angle of the prisms arranged on the prism layer and combining the light emitting convex points on the bottom microstructure layer 103, the light emitted from the surface of the second prism layer 105 can enter the angle deflection film 106 in a vertical direction, thereby avoiding the problem of light intensity differences between different areas of the angle deflection film caused by large differences in the angles of the incident light.

[0086] In the embodiment of the utility model, the light guide plate 102, microstructure layer 103, first prism layer 104, second prism layer 105 and angle deflection film 106 provided in the utility model are sequentially arranged and a backlight module is obtained, and the light emitted from the light-emitting surface of the angle deflection film 106 of the backlight module has high consistency, and the brightness received by the human eye is consistent when observed at different viewing angles. Thus, by improving the film layer structure in the backlight module, the consistency of the display effect is effectively improved. And compared with the traditional backlight module, the uniformity of the viewing angle is improved by 30% to 40%, and the brightness is increased by 20% to 40%. Thus, the light efficiency of the backlight module is effectively improved.

[0087] Furthermore, the example of the utility model also provides a display panel and a display device, wherein the display device includes the display panel and the backlight module provided in the utility model. The display device can be any product or component with display, anti-peeping performance or other functions, such as a mobile phone, a computer, an electronic paper, a display, wearable glasses, etc., and its specific type is not specifically limited.

[0088] In summary, the above is a detailed introduction to a backlight module and a display device provided by an embodiment of the utility model. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the utility model. Although the utility model is disclosed as above in the preferred embodiments, the above preferred embodiments are not used to limit the utility model. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model is based on the scope defined by the claims.

Claims

1. A backlight module, characterized in that: At least: Light source; A light guide plate, arranged on one side of the light source; as well as, An angle deflection film, arranged on the light emitting side of the light guide plate; The angle deflection film comprises a plurality of light emitting portions, each of which is provided with an annular light emitting surface inclined toward the center of the angle deflection film, and a height of the annular light emitting surface close to the center of the angle deflection film is smaller than a height away from the center of the angle deflection film.

2. The backlight module according to claim 1, characterized in that: The centers of the plurality of annular light-emitting surfaces are located on the same axis, and the annular light-emitting surfaces and the bottom surface of the light-emitting portion have a first angle; The first angle close to the center of the angle deflection film is greater than the first angle far from the center of the angle deflection film, and the first angle is less than 45°.

3. The backlight module according to claim 1, characterized in that: The width of the annular light emitting surface close to the center of the angle deflection film is greater than the width of the annular light emitting surface far from the center of the angle deflection film.

4. The backlight module according to claim 1, characterized in that: The bottom surfaces of the plurality of light emitting portions are located on the same plane, and the cross-sectional shape of the light emitting portion is set to be a right triangle.

5. The backlight module according to claim 4, characterized in that: The right triangle has a first side, a second side and a hypotenuse; Among them, the plane corresponding to the hypotenuse is the annular light-emitting surface of the light-emitting portion, the first side edge is parallel to the bottom surface of the light-emitting portion, the second side edge is perpendicular to the bottom surface of the light-emitting portion, the heights of the second side edges corresponding to different light-emitting portions are the same, and the first side edge and the second side edge have different lengths.

6. The backlight module according to claim 1, characterized in that: The angle deflection film further comprises a supporting substrate, a plurality of light emitting portions are arranged on the supporting substrate, and the light emitting portions at least comprise a first light emitting portion and a second light emitting portion which are arranged adjacent to each other, and the first light emitting portion is arranged on a side close to the center of the angle deflection film; The first light emitting portion has a first annular light emitting surface, the second light emitting portion has a second annular light emitting surface, and the outer diameter of the first annular light emitting surface is the same as the inner diameter of the second annular light emitting surface.

7. The backlight module according to claim 1, characterized in that: The plurality of light sources are correspondingly arranged on the side of the light guide plate, and the light guide plate includes a plurality of light reflecting parts, and the light reflecting parts are correspondingly arranged on the bottom of the light guide plate; Wherein, the arrangement density of the reflective parts at the edge of the light guide plate is greater than the arrangement density near the center of the light guide plate.

8. The backlight module according to claim 7, characterized in that: The reflective portion includes a prism, and a plane where one side of the prism is located and a bottom surface of the light guide plate have a second angle; Wherein, the second angle of the prism on a side close to the light source is smaller than the second angle on a side far from the light source.

9. The backlight module according to claim 1, characterized in that: The backlight module also includes: A microstructure layer, disposed on the light-emitting side of the light guide plate; A first prism layer is disposed on a side of the microstructure layer away from the light guide plate; A second prism layer is disposed on a side of the first prism layer away from the light guide plate; Among them, multiple light-emitting protrusions are arranged on the upper and lower surfaces of the microstructure layer, multiple first prisms are arranged on the side of the first prism layer facing the angle deflection film, and multiple second prisms are arranged on the side of the second prism layer facing the angle deflection film.

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

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