Backlight module and display device

Abstract

The invention relates to a backlight module and a display device, and the backlight module comprises a lamp panel which comprises a lamp panel body and a plurality of light sources located on the side, away from a bottom plate, of the lamp panel body; the optical adjusting function layer is located on the sides, away from the bottom plate, of the light sources; the optical adjusting function layer comprises an optical body layer and a lens layer, the optical body layer comprises a first surface deviating from the bottom plate and a second surface close to the bottom plate, the lens layer is located on the side, away from the second surface, of the first surface and connected with the first surface, and the lens layer comprises a plurality of lens units; the lens units and the light sources are correspondingly arranged, and the orthographic projection of the light sources on the bottom plate is located in the range of the orthographic projection of the corresponding lens units on the bottom plate; the optical body layer comprises a plurality of first grooves located on the first surface; the orthographic projection of the first groove on the bottom plate is located between the orthographic projections of two adjacent lens units on the bottom plate; the orthographic projection of the first groove on the bottom plate at least partially surrounds the orthographic projection of the corresponding light source on the bottom plate. The brightness can be improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a backlight module and display device. Background Technology

[0002] With the rapid development of display technology, liquid crystal display devices (such as LCD TVs, LCD monitors, and LCD screens) are increasingly widely used in production and daily life due to their advantages such as low-voltage driving, flat panel structure, large display information capacity, ease of colorization, long lifespan, and no radiation or pollution. However, liquid crystal display devices are passive display devices; they cannot emit light themselves. Therefore, a backlight unit (BLU) is required below the LCD panel to provide the necessary light source for display. The backlight module is one of the key components of a liquid crystal display device. Its basic principle is to convert the commonly used point or line light emission into high-brightness and uniform grayscale surface light emission, enabling the LCD panel to display images normally. Backlight modules used in new applications such as head-up displays require ultra-high brightness.

[0003] However, in related technologies, backlight modules have the problem of simultaneously achieving high uniformity and ultra-high brightness. Summary of the Invention

[0004] Therefore, it is necessary to provide a backlight module and display device to solve the problem that backlight modules in related technologies cannot simultaneously achieve high uniformity and ultra-high brightness.

[0005] In a first aspect, embodiments of this application provide a backlight module, including:

[0006] Base plate;

[0007] A light panel is located on one side of the base plate. The light panel includes a light panel body and a plurality of light sources located on the side of the light panel body away from the base plate.

[0008] An optical adjustment layer is located on the side of the plurality of light sources away from the base plate;

[0009] The optical adjustment functional layer includes an optical body layer and a lens layer. The optical body layer includes a first surface away from the base plate and a second surface close to the base plate. The lens layer is located on the side of the first surface away from the second surface and is connected to the first surface. The lens layer includes a plurality of lens units.

[0010] The lens unit is disposed corresponding to the light source, and the orthographic projection of the light source on the base plate is located within the range of the orthographic projection of the corresponding lens unit on the base plate;

[0011] The optical body layer includes a plurality of first grooves located on the first surface; the orthographic projection of the first groove on the base plate is located between the orthographic projections of two adjacent lens units on the base plate.

[0012] The orthographic projection of the first groove on the base plate at least partially surrounds the orthographic projection of the corresponding light source on the base plate.

[0013] Secondly, based on the same application concept, embodiments of this application provide a display device including the backlight module described in any one of the above.

[0014] In this embodiment, the backlight module includes a base plate, a lamp plate, and an optical adjustment functional layer. The lamp plate is located on one side of the base plate and includes a lamp plate body and multiple light sources located on the side of the lamp plate body away from the base plate. The optical adjustment functional layer is located on the side of the multiple light sources away from the base plate. The optical adjustment functional layer includes an optical body layer and a lens layer. The optical body layer includes a first surface away from the base plate and a second surface close to the base plate. The lens layer is located on the side of the first surface away from the second surface and is connected to the first surface. The lens layer includes multiple lens units. The lens units are correspondingly arranged with the light sources, and the orthographic projection of the light source on the base plate is within the range of the orthographic projection of the corresponding lens unit on the base plate. The optical body layer includes multiple first grooves on the first surface. The orthographic projection of the first groove on the base plate is located between the orthographic projections of two adjacent lens units on the base plate. The orthographic projection of the first groove on the base plate at least partially surrounds the orthographic projection of the corresponding light source on the base plate. Multiple first grooves are provided on the first surface of the optical body layer, and adjacent lens units are spaced apart, with a first groove between adjacent lens units. The first grooves can be filled with air (air slots). The light emitted by a light source can exit well from the corresponding lens unit. When the large-angle light emitted by the light source is incident on the first groove, the sidewall of the first groove can totally reflect or refract the large-angle light. The large-angle light does not exit from the lens unit adjacent to the corresponding lens unit (non-corresponding lens unit), which avoids light crosstalk and improves the brightness of the viewing angle. This makes the color / brightness distribution of the displayed image more uniform, and the backlight module / display device can also have higher brightness. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1This is a schematic diagram of the overall cross-sectional structure of a backlight module provided in some embodiments of this application.

[0017] Figure 2 This is a schematic diagram of a first partial cross-sectional structure of a backlight module provided in some embodiments of this application.

[0018] Figure 3 A schematic diagram of light emission is compared with some embodiments of the present application in related technologies.

[0019] Figure 4 This is a schematic diagram of a second partial cross-sectional structure of a backlight module provided for some embodiments of this application.

[0020] Figure 5 This is a schematic diagram of a partial structure of a backlight module provided in some embodiments of this application, projected onto a base plate.

[0021] Figure 6 This is a schematic diagram of a display device provided for some embodiments of this application.

[0022] Explanation of reference numerals in the drawings: Display device 200; Backlight module 100; Display panel 10; Base plate 11; Lamp panel 12; Optical adjustment functional layer 13; Lamp panel body 121; Light source 122; Optical body layer 131; Lens layer 132; First surface 131a; Second surface 131b; Lens unit 1321; First groove 131c; First groove sidewall 131c1; Second groove 131d; Second groove sidewall 131d1;

[0023] First included angle α1; Second included angle α2; Side plate 14; Accommodation space 114; First reflective layer 15; Side support layer 16; Support body 161; First protrusion 162; First positioning structure 131e; Second positioning structure 121e; First angle θ1; Second angle θ2; Third angle α; Initial angle β; Fourth angle θ3; Fifth angle θ4; Iron-plastic frame 17; Microlens plate 18; Large angle light ray 122g. Detailed Implementation

[0024] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] When describing positional relationships, unless otherwise specified, when an element, such as a layer, film, or substrate, is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements present. Furthermore, when a layer is referred to as being "below" another layer, it may be directly below it or there may be one or more intermediate elements present. It is also understood that when a layer is referred to as being "between" two layers, it may be the only layer between the two layers, or there may be one or more intermediate elements present.

[0027] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0028] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0029] It should also be understood that, in interpreting an element, although not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of a particular value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0030] Furthermore, in the instruction manual, the phrase "planar distribution diagram" refers to the diagram when the target part is viewed from above, and the phrase "cross-sectional diagram" refers to the diagram when the target part is viewed from the side as a cross-section taken by vertically cutting the target part.

[0031] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0032] In related technologies, backlight modules face the challenge of simultaneously achieving high uniformity and ultra-high brightness. Since head-up displays (HUDs) typically require ultra-high brightness (generally above 100,000 nits), direct-lit backlight modules are generally used, employing anti-reflective structures (such as lenses) to achieve this. However, several issues arise: 1) severe crosstalk occurs between different zones (e.g., between different light sources or LEDs). The anti-reflective structure and the light source require a certain optical distance, inevitably causing large-angle light rays to intrude into one or more adjacent zones (the light-emitting areas of adjacent light sources or anti-reflective units); 2) vibration or movement of the backlight module, display panel, or display device causes mismatch (misalignment) between the light source and the anti-reflective structure; and 3) low brightness at the edges of the screen. These problems all contribute to the difficulty in simultaneously achieving high uniformity and ultra-high brightness in related backlight modules.

[0033] Based on the aforementioned technical problems, the inventors discovered that the backlight module includes a base plate, a lamp plate, and an optical adjustment functional layer. The lamp plate is located on one side of the base plate and includes a lamp plate body and multiple light sources located on the side of the lamp plate body away from the base plate. The optical adjustment functional layer is located on the side of the multiple light sources away from the base plate. The optical adjustment functional layer includes an optical body layer and a lens layer. The optical body layer includes a first surface away from the base plate and a second surface close to the base plate. The lens layer is located on the side of the first surface away from the second surface and is connected to the first surface. The lens layer includes multiple lens units. The lens units are correspondingly arranged with the light sources, and the orthographic projection of the light source on the base plate is within the range of the orthographic projection of the corresponding lens unit on the base plate. The optical body layer includes multiple first grooves on the first surface. The orthographic projection of the first groove on the base plate is located between the orthographic projections of two adjacent lens units on the base plate. The orthographic projection of the first groove on the base plate at least partially surrounds the orthographic projection of the corresponding light source on the base plate. Multiple first grooves are provided on the first surface of the optical body layer, and adjacent lens units are spaced apart, with a first groove between adjacent lens units. The first grooves can be filled with air (air slots). The light emitted by a light source can exit well from the corresponding lens unit. When the large-angle light emitted by the light source is incident on the first groove, the sidewall of the first groove can totally reflect or refract the large-angle light. The large-angle light does not exit from the lens unit adjacent to the corresponding lens unit (non-corresponding lens unit), which avoids light crosstalk and improves the brightness of the viewing angle. This makes the color / brightness distribution of the displayed image more uniform, and the backlight module / display device can also have higher brightness.

[0034] The above is the core idea of ​​this application. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] Please see Figures 1 to 5 . Figure 1 This is a schematic diagram of the overall cross-sectional structure of a backlight module provided in some embodiments of this application. Figure 2 This is a schematic diagram of a first partial cross-sectional structure of a backlight module provided in some embodiments of this application.

[0036] Figure 3 A schematic diagram of light emission is compared with some embodiments of the present application in related technologies.

[0037] Figure 4 This is a schematic diagram of a second partial cross-sectional structure of a backlight module provided for some embodiments of this application. Figure 5 This is a schematic diagram of a partial structure of a backlight module provided in some embodiments of this application, projected onto a base plate.

[0038] This application provides a backlight module 100, which includes a base plate 11, a lamp plate 12, and an optical adjustment functional layer 13. The lamp plate 12 is located on one side of the base plate 11, and includes a lamp plate body 121 and a plurality of light sources 122 located on the side of the lamp plate body 121 away from the base plate 11; the optical adjustment functional layer 13 is located on the side of the plurality of light sources 122 away from the base plate 11. The optical adjustment functional layer 13 includes an optical body layer 131 and a lens layer 132. The optical body layer 131 includes a first surface 131a away from the base plate 11 and a second surface 131b close to the base plate 11. The lens layer 132 is located on the side of the first surface 131a away from the second surface 131b and is connected to the first surface 131a. The lens layer 132 includes a plurality of lens units 1321. The lens units 1321 are correspondingly arranged with the light source 122. The orthographic projection of the light source 122 on the base plate 11 is located within the range of the orthographic projection of the corresponding lens unit 1321 on the base plate 11. The optical body layer 131 includes a plurality of first grooves 131c located on the first surface 131a. The orthographic projection of the first groove 131c on the base plate 11 is located between the orthographic projections of two adjacent lens units 1321 on the base plate 11. The orthographic projection of the first groove 131c on the base plate 11 at least partially surrounds the orthographic projection of the corresponding light source 122 on the base plate 11.

[0039] For example, the light source 122 may be a light-emitting diode (LED), a mini light-emitting diode (Mini LED), or a micro light-emitting diode (Micro LED), but is not limited to these.

[0040] For example, the light panel 12 includes a light panel body 121 and a plurality of light sources 122 located on the side of the light panel body 121 away from the base plate 11; the light panel body 121 may be a circuit board, but is not limited to this.

[0041] For example, the optical adjustment functional layer 13 includes an optical body layer 131 and a lens layer 132. Both the optical body layer 131 and the lens layer 132 can be light-transmitting materials or transparent materials, but are not limited thereto.

[0042] For example, the lens layer 132 is located on the side of the first surface 131a away from the second surface 131b and is connected to the first surface 131a. The lens layer 132 includes a plurality of lens units 1321; the lens units 1321 are correspondingly disposed with respect to the light source 122. The lens layer 132 and the optical body layer 131 can be an integral structure, but are not limited thereto.

[0043] For example, such as Figure 5 As shown, lens unit 1321 is correspondingly arranged with light source 122. The orthographic projection of light source 122 on base plate 11 is located within the range of the orthographic projection of corresponding lens unit 1321 on base plate 11. Lens unit 1321 and light source 122 can be arranged in a one-to-one correspondence, with the orthographic projection of one light source 122 on base plate 11 located within the range of the orthographic projection of a corresponding lens unit 1321 on base plate 11, but this is not limited to this. For example, lens unit 1321 can also be correspondingly arranged with two light sources 122, with the orthographic projections of the two light sources 122 on base plate 11 located within the range of the orthographic projection of a corresponding lens unit 1321 on base plate 11.

[0044] For example, the optical body layer 131 includes a plurality of first grooves 131c located on the first surface 131a; the first grooves 131c do not penetrate the optical body layer 131.

[0045] For example, such as Figure 5 As shown, the orthographic projection of the first groove 131c on the base plate 11 surrounds or completely surrounds the orthographic projection of the corresponding light source 122 on the base plate 11.

[0046] For example, a first groove 131c is distributed around the lens unit 1321. The first groove 131c can be an air channel. This design uses the principle of total internal reflection to control the propagation of light, so that total internal reflection occurs at the boundary, and the light is emitted from the convex mirror on the upper surface of the lens unit 1321.

[0047] For example, the first groove 131c and other structures confine the light within a single zone (the area corresponding to the lens unit 1321), effectively avoiding light crosstalk between zones, converging the light beam, increasing the light energy of small-angle light, improving the brightness at a 0° viewing angle with the same power consumption, and reducing the module power consumption with the same brightness; it also increases the heat dissipation channel and reduces power consumption.

[0048] In this embodiment, the backlight module 100 includes a base plate 11, a lamp plate 12, and an optical adjustment functional layer 13. The lamp plate 12 is located on one side of the base plate 11, and the lamp plate 12 includes a lamp plate body 121 and a plurality of light sources 122 located on the side of the lamp plate body 121 away from the base plate 11; the optical adjustment functional layer 13 is located on the side of the plurality of light sources 122 away from the base plate 11. The optical adjustment functional layer 13 includes an optical body layer 131 and a lens layer 132. The optical body layer 131 includes a first surface 131a away from the base plate 11 and a second surface 131b close to the base plate 11. The lens layer 132 is located on the side of the first surface 131a away from the second surface 131b and is connected to the first surface 131a. The lens layer 132 includes a plurality of lens units 1321. The lens units 1321 are correspondingly arranged with the light source 122. The orthographic projection of the light source 122 on the base plate 11 is located within the range of the orthographic projection of the corresponding lens unit 1321 on the base plate 11. The optical body layer 131 includes a plurality of first grooves 131c located on the first surface 131a. The orthographic projection of the first groove 131c on the base plate 11 is located between the orthographic projections of two adjacent lens units 1321 on the base plate 11. The orthographic projection of the first groove 131c on the base plate 11 at least partially surrounds the orthographic projection of the corresponding light source 122 on the base plate 11. Multiple first grooves 131c are provided on the first surface 131a of the optical body layer 131. Two adjacent lens units 1321 are spaced apart, and a first groove 131c is provided between two adjacent lens units 1321. The first groove 131c can be filled with air (air slot). The light emitted by a light source 122 can be well emitted from the corresponding lens unit 1321. When a large-angle light emitted by the light source 122 is incident on the first groove 131c, the sidewall of the first groove 131c can totally reflect or refract the large-angle light. The large-angle light does not exit from the lens unit 1321 adjacent to the corresponding lens unit 1321 (non-corresponding lens unit 1321), avoiding light crosstalk and improving the brightness at the viewing angle. This makes the color / brightness distribution of the displayed image more uniform, and the backlight module 100 / display device can also have higher brightness.

[0049] In some embodiments, the optical body layer 131 includes a plurality of second grooves 131d located on the second surface 131b; the orthographic projection of the light source 122 on the base plate 11 is located within the range of the orthographic projection of the corresponding second groove 131d on the base plate 11; the orthographic projection of the first groove 131c on the base plate 11 at least partially surrounds the orthographic projection of the corresponding second groove 131d on the base plate 11.

[0050] For example, such as Figure 2 and Figure 3 As shown, the orthographic projection of the first groove 131c on the base plate 11 partially or completely surrounds the orthographic projection of the corresponding second groove 131d on the base plate 11. That is, when the orthographic projection of the first groove 131c on the base plate 11 surrounds the orthographic projection of the corresponding light source 122 on the base plate 11, and the orthographic projection of the first groove 131c on the base plate 11 surrounds the orthographic projection of the corresponding second groove 131d on the base plate 11: in the orthographic projection on the base plate 11, the light source 122 is located in the middle, the edge of the second groove 131d is located outside the light source 122, and the first groove 131c is located outside the second groove 131d away from the light source 122. The second groove 131d is closer to the light source 122. In the orthographic projection on the base plate 11, the size of the second groove 131d is smaller. The large-angle light emitted by the light source 122 first passes through the second groove 131d and then is reflected / converged by the first groove 131c. This allows the large-angle light emitted by the light source 122 to be emitted from the orthographic angle better, thereby avoiding light crosstalk and improving brightness.

[0051] For example, such as Figure 2 and Figure 3 As shown, the second surface 131b has a concave microstructure of a second groove 131d, which allows light to be refracted on the surface of the second groove 131d and effectively converges large-angle light.

[0052] For example, such as Figure 2 and Figure 3 As shown, the specially designed lens unit 1321 has a special optical concave structure (second groove 131d) designed in the area directly above the light source 122. The second groove 131d can effectively converge the large-angle light 122g. At the same time, an air channel (first groove 131c) is designed around the lens unit 1321 on the front of the optical adjustment functional layer 13 to completely reflect the refracted light entering from the lower surface into the corresponding lens unit 1321 partition, so as to utilize light more efficiently and avoid light crosstalk between partitions. Furthermore, the current of the light source 122 does not need to be increased at the edge of the module, reducing power consumption and improving efficiency.

[0053] In some implementations, such as Figure 4As shown, the first groove 131c includes a first groove sidewall 131c1 that connects to the first surface 131a, and the angle between the first groove sidewall 131c1 and the normal of the second surface 131b is 0 degrees to 10 degrees.

[0054] For example, such as Figure 4 As shown, the angle (first angle α1) between the normal of the first groove sidewall 131c1 and the second surface 131b is 0 to 10 degrees. The angle (first angle α1) between the first groove sidewall 131c1 and the normal of the second surface 131b can be any one of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 degrees. This allows the sidewall of the first groove 131c to totally reflect or refract the large-angle light when the light source 122 emits a large-angle light. The large-angle light does not exit from the lens unit 1321 adjacent to the corresponding lens unit 1321 (non-corresponding lens unit 1321), thus avoiding light crosstalk and improving the brightness at the viewing angle. This results in a more uniform distribution of color / brightness in the displayed image, and the backlight module 100 / display device can also have higher brightness.

[0055] In some implementations, such as Figure 3 and Figure 4 As shown, lens unit 1321 is a convex lens; and / or, the orthographic projection of the first groove 131c on the base plate 11 is a closed loop; and / or, the orthographic projection of the light source 122 on the base plate 11 coincides with the center of the orthographic projection of the corresponding first groove 131c on the base plate 11. This ensures that the sidewalls of the first groove 131c can effectively reflect or refract large-angle light at all azimuth angles, and the intensity of the large-angle light reflected or refracted by the sidewalls of the first groove 131c at all azimuth angles is the same or similar, thus improving the brightness uniformity at all azimuth angles.

[0056] In some implementations, such as Figure 3 and Figure 4 As shown, the second groove 131d includes a second groove sidewall 131d1 that connects to the second surface 131b, and the angle between the tangent of the second groove sidewall 131d1 and the second surface 131b is 135 degrees to 170 degrees.

[0057] For example, such as Figure 3 and Figure 4 As shown, the angle (second angle α2) between the tangent of the second groove sidewall 131d1 and the second surface 131b is between 135 degrees and 170 degrees. The angle α2 can be any one of 135 degrees, 140 degrees, 145 degrees, 150 degrees, 155 degrees, 160 degrees, 165 degrees, or 170 degrees. This allows light to be refracted through the second groove sidewall 131d1, effectively converging large-angle light rays.

[0058] In some implementations, such as Figure 3 and Figure 4 As shown, the second groove 131d is shaped like a concave lens; and / or, the center of the orthographic projection of the light source 122 on the base plate 11 coincides with the center of the orthographic projection of the corresponding second groove 131d on the base plate 11. This ensures that the sidewalls of the second groove 131d can effectively refract large-angle light at all azimuth angles, and the intensity of the large-angle light refracted by the sidewalls of the second groove 131d at all azimuth angles is the same or similar, thus improving the brightness uniformity at all azimuth angles.

[0059] In some implementations, such as Figure 1 As shown, the backlight module 100 also includes a side plate 14 and a first reflective layer 15. The side plate 14 is connected to the base plate 11, and the base plate 11 and the side plate 14 form an accommodating space 114, in which the lamp plate 12 is located. The first reflective layer 15 is located between the side plate 14 and the side end face of the optical adjustment functional layer 13. In a direction parallel to the plane of the base plate 11, the first reflective layer 15 extends at least partially around the side end face of the optical adjustment functional layer 13.

[0060] For example, such as Figure 1 As shown, the side plate 14 and the base plate 11 can be an integrally formed structure, but are not limited to this. The side plate 14 is arranged around the optical adjustment functional layer 13.

[0061] For example, such as Figure 1 As shown, the visible light reflectivity of the first reflective layer 15 can be greater than or equal to any of the values ​​of 85%, 90%, and 95%.

[0062] For example, such as Figure 1 As shown, in related technologies, the edge frame (MF) has low reflectivity (e.g., less than 80%), and the light emitted by the edge light source 122 is partially reflected into the module by the frame, while some light is absorbed, resulting in lower brightness at the edges of the backlight module 100. The first reflective layer 15 can reflect the light emitted by the edge light source 122, improving edge brightness and enhancing brightness uniformity.

[0063] In some implementations, such as Figure 1 As shown, the backlight module 100 also includes a side support layer 16. The side support layer 16 is located between the side end face of the first reflective layer 15 and the optical adjustment functional layer 13; in a direction parallel to the plane of the base plate 11, the side support layer 16 extends at least partially around the side end face of the optical adjustment functional layer 13; the side support layer 16 includes a support body 161 and a first protrusion 162 located on the side of the support body 161 near the side end face of the optical adjustment functional layer 13, the optical adjustment functional layer 13 being located on the side of the first protrusion 162 facing away from the base plate 11; the side support layer 16 includes a light-transmitting material.

[0064] For example, such as Figure 1 As shown, the first protrusion 162 is used to support the optical adjustment functional layer 13, so that there is an appropriate distance between the optical adjustment functional layer 13 / second groove 131d and the light source 122.

[0065] For example, such as Figure 1 As shown, the side support layer 16 includes a light-transmitting material, so that the light emitted by the light source 122 can pass through the support body 161 to reach the first reflective layer 15, and then be reflected and reused by the first reflective layer 15. Thus, the first reflective layer 15 can reflect the light emitted by the light source 122 at the edge position, improve the edge brightness, and enhance the brightness uniformity.

[0066] For example, the side support layer 16 includes a light-transmitting material (e.g., visible light transmittance greater than 90%). The transparent material replaces the internal support structure of the module, improving light efficiency, providing no obstruction, and allowing for further development of narrow bezel designs.

[0067] For example, a transparent frame with a reflective sheet on the side wall of the back panel (first reflective layer 15) reduces light absorption inside the module and effectively improves the utilization rate of edge light. The module edge does not need to increase the current of the light source 122, reducing power consumption and improving efficiency; it can effectively reduce the module frame.

[0068] In some implementations, such as Figure 1 As shown, the optical body layer 131 includes a first positioning structure 131e located on the second surface 131b; the lamp panel body 121 includes a second positioning structure 121e, one of the first positioning structure 131e and the second positioning structure 121e includes a protrusion, and the other includes a recess adapted to the protrusion; the protrusion is at least partially accommodated in the corresponding recess.

[0069] For example, such as Figure 1 As shown in the example, the first positioning structure 131e is recessed and the second positioning structure 121e is protruding. The second positioning structure 121e can be at least partially housed within the corresponding first positioning structure 131e, so that the lamp panel 12 and the optical adjustment functional layer 13 are precisely aligned, so that the light source 122 and the lens unit 1321 are precisely aligned, so that the light lens unit 1321 can effectively converge the light emitted by the corresponding light source 122, and so that the sidewall of the first groove 131c can accurately reflect or refract the large-angle light of the corresponding light source 122.

[0070] For example, such as Figure 1 As shown, the first positioning structure 131e and the second positioning structure 121e are precisely aligned and fixed, which can prevent the backlight module, display panel, or display device from vibrating or being moved, causing the light source and anti-reflection structure to become mismatched (misaligned).

[0071] For example, the optical adjustment functional layer 13 is constrained to move in a direction parallel to the plane of the base plate 11 by the first positioning structure 131e and the second positioning structure 121e1, and is supported by the first protrusion 162 in a direction perpendicular to the plane of the base plate 11 and constrained by double-sided adhesive.

[0072] It should be noted that in some embodiments, the light source 122 is located directly below the second groove 131d, and the distance from the light source 122 to the optical adjustment functional layer 13 is 0.1-0.5mm.

[0073] It should be noted that, in some implementations, optical path analysis, such as Figure 3 As shown, the large-angle ray 122g is emitted from the light source 122 and reaches the lower surface (concave surface) of the second groove 131d. The air refractive index is n1, and the optical body layer 131 has a refractive index of n2. The incident angle is the first angle θ1. According to Snell's law of refraction, the refraction angle is the second angle θ2 = Arcsin(n1 / n2*sin(θ1)). The angle between the refracted ray and the 0° normal is the third angle α. It is obvious that the third angle α is smaller than the initial angle β in the related technology (the angle between the refracted ray on the lower surface of the ordinary lens and the 0° normal), which proves that the second groove 131d favors the concentration of light rays at small angles. Further, the ray reaches the surface of the air channel, and the incident angle is the fourth angle θ3 = (90°-α). According to the condition of total internal reflection, the fourth angle θ3 > Arcsin(n1 / n2). All the light rays at the interface are reflected back into the lens, and the reflection angle is the fifth angle θ4 = -θ3. Further, the ray reaches the upper surface lens unit 1321 and exits without spilling out into the adjacent partition.

[0074] It should be noted that in some implementation methods, such as Figure 1 As shown, the backlight module 100 also includes an iron-plastic frame 17 surrounding the outside of the side plate 14, and a prism layer or microlens plate 18 located on the side of the optical adjustment functional layer 13 away from the lamp plate 12.

[0075] Please see Figure 6 , Figure 6 This is a schematic diagram of a display device provided for some embodiments of this application.

[0076] Secondly, based on the same concept, this application also provides a display device 200, which includes a backlight module 100 of any of the above-mentioned features, or a backlight module 100 combining any of the above-mentioned features. The display device 200 may include a display panel 10 located on the light-emitting side of the backlight module 100.

[0077] For example, the display device 200 also has the beneficial effects of the backlight module 100 in the above embodiments. The similarities can be understood by referring to the explanation of the backlight module 100 above, and will not be repeated below.

[0078] For example, the display device 200 provided in the embodiments of this application can be Figure 6 The vehicle shown can also be any electronic product with display function, including but not limited to the following categories: television, laptop, desktop monitor, tablet, digital camera, mobile phone, smart bracelet, smart glasses, vehicle display, industrial control equipment, medical display screen, touch interactive terminal, etc., and the embodiments of this application do not make any special limitations on this.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A backlight module, characterized in that, include: Base plate; A light panel is located on one side of the base plate. The light panel includes a light panel body and a plurality of light sources located on the side of the light panel body away from the base plate. An optical adjustment layer is located on the side of the plurality of light sources away from the base plate; The optical adjustment functional layer includes an optical body layer and a lens layer. The optical body layer includes a first surface away from the base plate and a second surface close to the base plate. The lens layer is located on the side of the first surface away from the second surface and is connected to the first surface. The lens layer includes a plurality of lens units. The lens unit is disposed corresponding to the light source, and the orthographic projection of the light source on the base plate is located within the range of the orthographic projection of the corresponding lens unit on the base plate; The optical body layer includes a plurality of first grooves located on the first surface; the orthographic projection of the first groove on the base plate is located between the orthographic projections of two adjacent lens units on the base plate. The orthographic projection of the first groove on the base plate at least partially surrounds the orthographic projection of the corresponding light source on the base plate.

2. The backlight module according to claim 1, characterized in that, The optical body layer includes a plurality of second grooves located on the second surface; The orthographic projection of the light source onto the base plate is located within the range of the orthographic projection of the corresponding second groove onto the base plate; The orthographic projection of the first groove on the base plate at least partially surrounds the orthographic projection of the corresponding second groove on the base plate.

3. The backlight module according to claim 1, characterized in that, The first groove includes a first groove sidewall that connects to the first surface, and the angle between the first groove sidewall and the normal of the second surface is 0 to 10 degrees.

4. The backlight module according to claim 1, characterized in that, The lens unit is a convex lens; and / or, The first groove, when projected onto the base plate, forms a closed loop; and / or, The orthographic projection of the light source onto the base plate coincides with the center of the orthographic projection of the corresponding first groove onto the base plate.

5. The backlight module according to claim 2, characterized in that, The second groove includes a second groove sidewall that connects to the second surface, and the angle between the tangent of the second groove sidewall and the second surface is 135 degrees to 170 degrees.

6. The backlight module according to claim 2, characterized in that, The second groove is in the shape of a concave lens; and / or, The orthographic projection of the light source onto the base plate coincides with the center of the orthographic projection of the corresponding second groove onto the base plate.

7. The backlight module according to claim 1, characterized in that, Also includes: A side panel is connected to the base plate, and the base plate and the side panel enclose a receiving space, with the lamp panel located within the receiving space; A first reflective layer is located between the side plate and the side end face of the optical adjustment functional layer; in a direction parallel to the plane of the base plate, the first reflective layer extends at least partially around the side end face of the optical adjustment functional layer.

8. The backlight module according to claim 7, characterized in that, Also includes: A side support layer is located between the side end face of the first reflective layer and the optical adjustment functional layer; In a direction parallel to the plane of the base plate, the side support layer extends at least partially around the side end face of the optical adjustment functional layer; The side support layer includes a support body and a first protrusion located on the side end face of the support body near the optical adjustment functional layer, wherein the optical adjustment functional layer is located on the side of the first protrusion opposite to the base plate. The side support layer includes a light-transmitting material.

9. The backlight module according to claim 1, characterized in that, The optical body layer includes a first positioning structure located on the second surface; The lamp panel body includes a second positioning structure, one of the first positioning structure and the second positioning structure includes a protrusion, and the other includes a recess adapted to the protrusion; The protrusion is at least partially accommodated within the corresponding recess.

10. A display device, characterized in that, Includes the backlight module as described in any one of claims 1 to 10.

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