WO2023155392A1

WO2023155392A1 - Mini led module and display device thereof

Info

Publication number: WO2023155392A1
Application number: PCT/CN2022/111780
Authority: WO
Inventors: 刘欣; 尤君平; 陈伟雄; 邹文聪; 李圣
Original assignee: 深圳创维－Rgb电子有限公司
Priority date: 2022-02-17
Filing date: 2022-08-11
Publication date: 2023-08-24
Also published as: CN114415426A; CN114415426B

Abstract

A Mini LED module (100) and a display device thereof. The Mini LED module (100) comprises: a reflective sheet (1); light-emitting diodes (2) used for being embedded on the reflective sheet (1); and a light-dispersing portion (3) used for being provided on the reflective sheet (1); the light-dispersing portion (3) comprises a light-transmissive film (31) and reflective lenses (32); each reflective lens (32) is used for covering the light-emitting diode (2), and the reflective lenses (32) and the light-emitting diodes (2) are arranged in an one-to-one correspondence manner; the upper surface of the reflective lens (32) is in a downwardly-recessed state; the reflective lens (32) extends upwards beyond the light-transmissive film (31), and the circumferential surface of the reflective lens (32) is a smooth surface; and the light-transmissive film (31) is used for being laid on the surface of the reflective sheet (1) and is connected to each reflecting lens (32), and a plurality of light-transmissive through holes (311) are formed on the light-transmissive film (31). Most of the light reaching the upper surface of the reflective lens (32) is reflected and then propagated downwards, and is refracted out along the circumferential surface of the reflective lens (32), part of the light is directly refracted out from the circumferential surface of the reflective lens (32), and the light is mixed by reflection of the reflective sheet (1), thereby obtaining relatively uniform surface light energy.

Description

Mini LED module and its display device

technical field

This application relates to the field of Mini LED, in particular to a Mini LED module and its display device.

Background technique

Mini LED (submillimeter light-emitting diode) technology is an emerging form of backlight module technology, which realizes regional dimming in a smaller range through a large number of densely distributed LEDs (Light-Emitting Diode, referred to as LED, light-emitting diode). Compared with the traditional backlight design, it can achieve better brightness uniformity, higher color contrast, higher brightness index within a smaller light mixing distance, and can flexibly realize various partition display effects.

With the rapid development of Mini LED display technology, Mini LED display products have begun to be used in ultra-large-screen high-definition displays, such as monitoring and command, high-definition broadcasting, high-end theaters, medical diagnosis, advertising display, conferences and exhibitions, office displays, virtual reality and other commercial fields .

Mini LED backlight technology has obvious advantages, but it also has some obvious technical defects in the display application side: 1. The light mixing distance is small, and the uneven distribution of light energy forms the feature of alternating light and dark. 2. The lack of light energy at the seam of the light board leads to the display of dark bands. 3. The traditional Mini LED module has a large number of LEDs, and the PCB (Printed Circuit Board, referred to as PCB) is thick and expensive.

Therefore, there are defects in the prior art and need to be improved and developed.

Contents of the invention

In view of the above deficiencies in the prior art, the purpose of this application is to provide a Mini LED module and its display device, which aims to solve the problem of poor display effect of the Mini LED module in the prior art.

A technical solution adopted by the application to solve technical problems is as follows:

A Mini LED module, comprising:

A reflective sheet;

light emitting diodes, used to be embedded on the reflective sheet;

The astigmatism part is used to be arranged on the reflective sheet; the astigmatism part includes a light-transmitting film and a reflective lens; the reflective lens is used to cover the light emitting diode, and the reflective lens and the light emitting diode are one One corresponding setting; the upper surface of the reflective lens is in a concave state; the reflective lens exceeds the light-transmitting film upwards, and the circumferential direction of the reflective lens is a smooth surface; the light-transmitting film is used for laying on the The surface of the reflective sheet, and the transparent film is connected to each of the reflective lenses, and the transparent film is provided with a plurality of penetrating light holes.

Further, the upper surface of the reflective lens is a frosted surface.

Further, the reflective lens is in the shape of a truncated cone, and its peripheral surface gradually shrinks toward the axis along the direction of increasing height.

Further, the bottom surface of the reflective lens is provided with mounting holes, and the light-emitting diodes are arranged in the corresponding mounting holes; the mounting holes extend upwards and have a height smaller than that of the reflective lens.

Further, the density of the light transmission holes between any two adjacent reflective lenses gradually increases from the middle to both ends.

Further, the reflective lens and the transparent film are made of polyester resin.

Further, the reflective lens is integrally formed with the light-transmitting film.

Further, the Mini LED module also includes a PCB board and a backplane;

The PCB boards are provided with multiple pieces, each of the PCB boards is spliced with each other and arranged under the reflector, the light emitting diodes are arranged on the corresponding PCB boards, and the tops of each of the light emitting diodes are outside beyond the reflective sheet.

Further, the top ends of the joints of any two adjacent PCB boards are covered by the light-scattering part.

Further, the back plate is in the shape of a groove, and the PCB board is installed in the groove formed by the back plate.

Further, the Mini LED module also includes:

a diffusion plate, the diffusion plate cover is arranged above the back plate to close the groove formed by the back plate;

A diaphragm, the diaphragm is a multi-layer thin film structure and attached to the diffuser plate.

Further, the density of the light-transmitting holes is realized by the number of the light-transmitting holes, and a small number of the light-transmitting holes are arranged in the middle area between the two reflective lenses, and from the middle area toward the two ends. The number of light-transmitting holes is gradually increased.

Further, the reflective lens and the transparent film are made of polystyrene or polycarbonate.

Further, the circumferential direction of the reflective lens is a smooth surface, so that the light reflected downward by the upper surface of the reflective lens is refracted along the circumferential direction of the reflective lens, and the circumferential direction is the direction of the circumferential side of the reflective lens. Arc surface.

The present application also provides a display device, which includes the above-mentioned Mini LED module.

As can be seen from the above technical solutions, the present application at least has the following advantages and positive effects:

In the present application, the reflective lens cover is arranged on the light-emitting diode, and the light emitted by the light-emitting diode enters the reflective lens, and the upper surface of the reflective lens is in a concave state, so it reaches the reflective lens. Most of the light on the upper surface is reflected and travels downward. The reflective lens exceeds the light-transmitting film upwards, and the peripheral surface of the reflective lens is a smooth surface, so the light reflected downward from the upper surface of the reflective lens will be refracted along the peripheral surface of the reflective lens, partly The light rays are directly refracted from the peripheral surface of the reflective lens. The light refracted from the peripheral surface of the reflective lens is in an oblique downward state, and reaches the surface of the reflective sheet along the light-transmitting hole. After being reflected by the reflective sheet, the travel of light can be increased, so that the light is mixed , so as to obtain a relatively uniform surface light energy.

Description of drawings

Figure 1 is a schematic diagram of the light emitting angle of a diode.

Figure 2 is a schematic diagram of the structure of a traditional Mini LED module.

Fig. 3 is a schematic structural diagram of a Mini LED module in an embodiment of the present application.

Fig. 4 is a schematic structural diagram of the astigmatism part in an embodiment of the present application.

Fig. 5 is a schematic diagram of light propagation of the astigmatism part in an embodiment of the present application.

FIG. 6 is a schematic diagram of the distribution of the density of light transmission holes and the intensity of light in an embodiment of the present application, wherein the origin of the coordinate system is the midpoint of two adjacent reflective lenses.

FIG. 7 is a schematic diagram of the propagation of light on the transparent film and the reflective sheet in an embodiment of the present application.

Explanation of reference signs:

100. Mini LED module;

1. Reflector; 2. LED; 3. Astigmatism; 31. Translucent film; 311. Translucent hole; 32. Reflective lens; 322. Mounting hole; 4. Diaphragm; 5. Diffusion plate; 6. Back board; 7, PCB board;

200. Traditional Mini LED modules.

Detailed ways

Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, are only for explaining the present application, and should not be construed as limiting the present application.

Please refer to FIG. 1 , in the prior art, the light output angle of a single light emitting diode 2 is usually about 120°, and its light energy is mainly concentrated on the front side of the light emitting surface, and the light energy is weaker as it gets closer to the edge. Please refer to Figure 2, the light mixing distance H of the traditional Mini LED module 200 in the prior art is usually about 5mm, so that the light energy reaching the diffuser plate is in a densely distributed state, and the forward area of the light emitting diode 2 is a bright area S1, the area between two adjacent light-emitting diodes 2 is a slightly dark area S2, which forms a visual effect feature of alternating light and dark. Moreover, due to the lack of light source at the joint of two adjacent PCB boards, a gap dark band S appears above the joint. The above-mentioned slightly dark area S2 and the gap dark band S seriously affect the performance of the traditional Mini LED module 200 in the prior art. The quality of the picture quality has restricted the development of Mini LED technology to a certain extent.

Please refer to FIG. 3 , in an embodiment of the present application, a Mini LED module 100 is disclosed. The Mini LED module 100 includes a groove-shaped backplane 6 and a PCB board 7 arranged in the backplane 6. , the light-emitting diode 2 electrically connected to the PCB board 7 and arranged on the surface of the PCB board 7, the reflective sheet 1 bonded to the surface of the PCB board 7, the astigmatism part 3 bonded to the surface of the reflective sheet 1, and the concave part covered on the back plate 6 The diffuser plate 5 with the slot opening and the diaphragm 4 bonded on the diffuser plate 5 . Wherein, the backboard 6 is a basic assembly platform, which is roughly in the shape of a groove, the PCB board 7 is installed in the groove formed by the backboard 6, and the light-emitting diodes 2 are provided with a plurality, each of the The LED 2 is installed on the PCB 7 and electrically connected with the PCB 7 . The reflective sheet 1 is laid on the PCB 7 , and a through hole is opened in the reflective sheet 1 corresponding to the light emitting diode 2 , so that the light emitting diode 2 is embedded on the reflective sheet 1 . The end of the reflection sheet 1 is arranged obliquely to reflect the light reaching there upwards to the diffuser plate 5 . The diffuser 3 is laid on the reflection sheet 1 . The diffuser plate 5 is covered above the back plate 6 to close the opening of the groove formed by the back plate 6 , and the diffuser plate 5 and the LEDs 2 are vertically spaced apart. The film 4 is attached above the backlight plate.

Please refer to FIG. 4 and FIG. 5 , the diffuser 3 includes a transparent film 31 and a reflective lens 32 , wherein the edge of the reflective lens 32 is connected to the transparent film 31 . The reflective lens 32 is covered on the LED 2 , there are multiple reflective lenses 32 , and each of the reflective lenses 32 is arranged in a one-to-one correspondence with each of the LEDs 2 . The light emitted by the light-emitting diode 2 enters the reflective lens 32, and the upper surface of the reflective lens 32 is in a concave state. Therefore, most of the light reaching the upper surface of the reflective lens 32 will propagate downward after reflection. . The reflective lens 32 exceeds the light-transmitting film 31 upwards, and the circumferential direction of the reflective lens 32 is a smooth surface. The smooth surface here means that the peripheral surface of the reflective lens 32 has a relatively small roughness to facilitate light transmission. Refract out. Therefore, the light reflected downward from the upper surface of the reflective lens 32 will be refracted along the circumferential direction of the reflective lens 32 , and the circumferential direction refers to the arc surface on the peripheral side of the reflective lens 32 .

Part of the light is directly refracted from the circumference of the reflective lens 32 . The light-transmitting film 31 is transparent and has a high light transmittance. The light-transmitting film 31 is used to lay on the surface of the reflective sheet 1 , and the light-transmitting film 31 is provided with a plurality of penetrating light-transmitting holes 311 . The light refracted from the peripheral surface of the reflective lens 32 is in an obliquely downward state, and reaches the surface of the reflective sheet 1 along the light-transmitting hole 311, and the reflection of the reflective sheet 1 can increase the travel of light , so that the light is mixed to obtain a relatively uniform surface light energy.

Moreover, the light rays refracted from the side surfaces of two adjacent reflective lenses 32 converge in the area between the two reflective lenses 32 . Referring to Fig. 3, the light rays refracted from the peripheral surface of the reflective lens 32 on the left side are obliquely down to the middle area of the two reflective lenses 32 on the right side, and the peripheral surface of the reflective lens 32 on the right side The refracted light slant down to the middle area of the two reflective lenses 32 along its left side. Since the angles of the light refracted by two adjacent reflective lenses 32 are different, the light in the middle area mixes more evenly.

The diaphragm 4 is a film structure with multiple layers. The diaphragm 4 is used to improve optical efficiency and reduce stray light. The detailed structure of the diaphragm 4 can refer to related technologies, and will not be described in detail herein.

The diffusion plate 5 is in the shape of a plate, which is used to disperse the luminous flux and distribute the light evenly. The detailed structure of the diffusion plate 5 and its connection with the diaphragm 4 and the back plate 6 can refer to related technologies, and will not be described in detail herein.

The reflective sheet 1 is in the shape of a film, and the reflective sheet 1 has multiple layers of bubbles along its thickness direction. Since the reflectivity r of light energy is: r=(n1-n2) ² /(n1+n2) ² , where n1 and n2 are the true refractive indices of the two media respectively. Set N to be the number of bubble layers that light energy passes through, then the total reflectivity R of the bubble layer to the light energy is: R=1-(1-r) ^N , where r is reflectivity, N is the number of medium layers, from It can be seen from this equation that the more the number N of bubble layers that light can pass through, the closer the total reflectance R is to 100%, so the multilayer bubble structure in the reflector 1 can irradiate most of the light on its surface. Reflect back. Therefore, the light refracted from the peripheral surface of the reflective lens 32 can reach the surface of the reflective sheet 1 through the light-transmissive hole 311 on the transparent film 31, and be reflected to the diffusion plate by the reflective sheet 1. 5 on.

Please refer to Fig. 4, as an implementation of this embodiment, the upper surface of the reflective lens 32 is a frosted surface, so the upper surface of the reflective lens 32 has a certain roughness, so it has the ability of diffuse reflection. When the light emitted by the light-emitting diode 2 reaches the surface of the reflective lens 32 through the air, the light diffusely reflects here, thereby breaking up the light here, and the light can be reflected from the reflective lens 32 after multiple reflections. The surrounding surface is refracted out, so as to reach the reflective sheet 1 through the perforation, so as to realize reflection.

And, because the upper surface of the reflective lens 32 is in a concave state, it has a divergent effect on a small amount of light refracted from the upper surface of the reflective lens 32, so that the light refracted from the top can be evenly diffused outwards .

Please refer to FIG. 4 , as an implementation of this embodiment, the reflective lens 32 is in the shape of a truncated cone, and its peripheral surface gradually shrinks toward the axis along the direction of rising height, that is, the two sides of the axial cross-sectional view of the reflective lens 32 The sides are in an inclined state, and the tops thereof move toward the axis of the reflective lens 32 . The light entering the reflective lens 32 is refracted from the peripheral surface of the reflective lens 32 after multiple reflections, and its angle is inclined downward, so that the refracted light reaches the reflective sheet 1 .

Please refer to FIG. 4 , as an implementation of this embodiment, the bottom surface of the reflective lens 32 is provided with mounting holes 322, and the light-emitting diodes 2 are arranged in the corresponding mounting holes 322 to realize the reflective lens. 32 is set on the light emitting diode 2. The installation hole 322 extends upwards, and its height is smaller than that of the reflective lens 32 , so that the light emitted by the LED 2 can enter the reflective lens 32 through the path of air→reflective lens 32 . The outline of the installation hole 322 is roughly semi-elliptical, so that the lights of different angles emitted by the light emitting diode 2 can all enter the reflective lens 32 at different angles along the surface of the installation hole 322, and make it incident on all Most of the light in the reflective lens 32 can be emitted from the peripheral surface of the reflective lens 32 .

Referring to FIG. 5 and FIG. 6 , as an implementation of this embodiment, the density of the light transmission holes 311 between any two adjacent reflective lenses 32 gradually increases from the middle to both ends. Please refer to Fig. 3, set up the Cartesian coordinate system with the middle position of two adjacent described reflective lenses 32, wherein I is the intensity of light, ρ is the density of the light-transmitting hole 311, after the light is refracted in the described reflective lens 32, the relative The light intensity between two adjacent reflective lenses 32 is the largest in the middle region of the two reflective lenses 32 , and the light intensity gradually decreases from the middle region to both sides. The light refracted from the reflective lens 32 reaches the surface of the reflective sheet 1 through the light hole 311 , and is reflected and scattered by the reflective sheet 1 to form divergent light that can be emitted upwards, effectively increasing the optical path and facilitating light mixing. The density of the light transmission holes 311 between any two adjacent reflection lenses 32 gradually increases from the middle to both ends, and a light transmission hole 311 with a lower density is set in the middle area, and part of the light energy is incident on the light transmission film 31, and its internal total reflection is consumed, and effective light energy cannot be formed, which can reduce the light mixing effect in the middle area, and set light-transmitting holes 311 with higher density at both ends to increase the light-mixing effect at both ends, through the light-transmitting The density arrangement design of the holes 311 can evenly redistribute the light energy reaching the reflection sheet 1 , so as to obtain a relatively uniform surface light source on the diffuser plate 5 , thereby avoiding the appearance of light and dark features on the diffuser plate 5 .

Wherein, the density of the light-transmitting holes 311 is realized by the quantity of the light-transmitting holes 311, that is, a small number of light-transmitting holes 311 are arranged in the middle region between the two reflective lenses 32, and from the middle region toward both ends, the The number of light-transmitting holes 311 gradually increases.

In some embodiments, it can also be realized by changing the size of the light-transmitting hole 311, that is, a light-transmitting hole 311 with a smaller area is set in the middle area between the two reflective lenses 32, and by changing the size of the light-transmitting film 31 Duty cycle, to achieve mixed light. The duty ratio here is equal to the area of the light-transmitting hole 311 on the carrier film divided by the total area of the carrier film.

Moreover, the traditional Mini LED module 200 is provided with a large number of light emitting diodes 2, resulting in a thicker PCB board 7 and higher cost. Compared with the prior art, the Mini LED module 100 proposed in this application can increase the arrangement spacing of the light-emitting diodes 2 due to the increased light-mixing effect, thereby reducing the total number of light-emitting diodes 2 and correspondingly reducing The thickness of PCB board 7, in order to reduce cost.

As an implementation of this embodiment, the reflective lens 32 and the transparent film 31 are made of polyester resin (also called PET, Polyethylene terephthalate, PET for short). Since polyester resin has good mechanical properties, the reflective lens 32 and the light-transmitting film 31 made of polyester resin have good impact strength and tensile properties, so that it is convenient to attach the reflective lens 32 to the transparent film 31. The light film 31 is installed on the reflection sheet 1 . The polyester resin has high transparency and low gloss, and the reflective lens 32 and the transparent film 31 made of polyester resin have better optical characteristics, and light energy propagates in the reflective lens 32 and the transparent film 31 , the loss is small. Moreover, polyester resin also has excellent resistance to high and low temperatures, oil resistance, fat resistance, dilute acid resistance, dilute alkali resistance, and most solvent resistance. Therefore, the reflective lens 32 made of polyester resin and the light-transmitting film 31 have Good stability, no expansion or contraction deformation due to increase or decrease of ambient temperature.

In other embodiments, the material of the reflective lens 32 and the transparent film 31 can also be polystyrene (also called PS, Polystyrene, referred to as PS) or polycarbonate (also called PC, Polycarbonate, referred to as PC) .

The reflective lens 32 is integrally formed with the transparent film 31 . In this embodiment, the reflective lens 32 and the transparent film 31 are made of polyester resin. Specifically, the polyester resin particles are processed into the astigmatism part 3 by precision injection molding technology, that is, the astigmatism part 3 is made by precision injection molding technology. The reflective lens 32 is integrally formed with the light-transmitting film 31, which can avoid the need to bond the reflective lens 32 to the light-transmitting film 31 after the reflective lens 32 and the light-transmitting film 31 are separately produced. Precision injection molding can improve production efficiency and reduce installation steps. The specific steps and processing techniques of the precision injection molding technology can refer to related technologies, and will not be described in detail herein.

Please refer to FIG. 3 , as an implementation of this embodiment, there are multiple PCB boards 7 , and each of the PCB boards 7 is spliced with each other and arranged under the reflection sheet 1 . The light-emitting diodes 2 are arranged on the corresponding PCB board 7, and the tops of the light-emitting diodes 2 exceed the reflection sheet 1 outwards, so that the light emitted by the light-emitting diodes 2 can pass through the light-scattering part 3 dispersed and shot onto the reflective sheet 1.

Please refer to FIG. 3 , as an implementation of this embodiment, the top ends of any two adjacent PCB boards 7 that are spliced are covered by the diffuser 3 . Since the light-transmitting film 31 is laid on the top of the PCB board 7, under the joint action of the light-transmitting hole 311 and the reflective sheet 1, the light is mixed above the joints of the PCB boards 7, The light above the joints of the PCB boards 7 is fully mixed, therefore, there will be no dark bands in the gap corresponding to the positions on the diffuser plate 5 at the joints of the PCB boards 7 , which can increase the overall display effect.

The assembly method of the Mini LED module 100 proposed in this application is as follows: the PCB board 7 on which the LED is installed is bonded to the inner side of the back plate 6 through double-sided adhesive, and then the reflector 1 is bonded to the inside of the back plate 6. The front of the PCB board 7, and then the astigmatism part 3 is bonded on the reflective sheet 1 by multi-point glue, so that the light-transmitting film 31 covers the reflective sheet 1, and at the same time, the reflective The lenses 32 are in one-to-one correspondence with the LEDs 2 , and the reflective lens 32 is covered on the LEDs 2 .

To sum up, the present application provides a Mini LED module 100, the Mini LED module 100 includes a reflective sheet 1, a light emitting diode 2, and an astigmatism part 3, and the astigmatism part 3 includes a light-transmitting film 31 and a reflective lens 32. The reflective lens 32 is covered on the light-emitting diode 2, the light emitted by the light-emitting diode 2 enters the reflective lens 32, and the upper surface of the reflective lens 32 is in a concave state. Most of the light on the upper surface of the reflective lens 32 propagates downward after reflection, and is refracted along the peripheral surface of the reflective lens 32 , and part of the light is directly refracted from the peripheral surface of the reflective lens 32 . The light refracted from the peripheral surface of the reflective lens 32 is in an oblique downward state, and reaches the surface of the reflective sheet 1 along the light transmission hole 311, and is reflected by the reflective sheet 1, so that the light is mixed, thereby A relatively uniform surface light energy is obtained.

The present application also provides a display device (not shown in the figure). In this embodiment, the display device is a TV set, and the TV set includes the above-mentioned Mini LED module 100 for providing a display function. However, the display device is not limited to a television set. Exemplarily, the display device may also be an outdoor display screen, an exhibition screen, and the like.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and thus should not be construed as limiting the application.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the present application, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiments.

Of course, the descriptions of the above-mentioned embodiments of the present application are relatively detailed, but they should not be interpreted as limiting the scope of protection of the present application. The present application can also have other various implementation modes. Other implementation modes obtained under the premise of any creative work belong to the scope of protection of this application, and the scope of protection of this application is subject to the appended claims.

Claims

A Mini LED module, including:

A reflective sheet;

light emitting diodes, used to be embedded on the reflective sheet;

The astigmatism part is used to be arranged on the reflective sheet; the astigmatism part includes a light-transmitting film and a reflective lens; the reflective lens is used to cover the light emitting diode, and the reflective lens and the light emitting diode are one One corresponding setting; the upper surface of the reflective lens is in a concave state; the reflective lens exceeds the light-transmitting film upwards, and the circumferential direction of the reflective lens is a smooth surface; the light-transmitting film is used for laying on the The surface of the reflective sheet, and the transparent film is connected to each of the reflective lenses, and the transparent film is provided with a plurality of penetrating light holes.
The Mini LED module according to claim 1, wherein the upper surface of the reflective lens is a frosted surface.
The Mini LED module according to claim 1, wherein the reflective lens is in the shape of a truncated cone, and its peripheral surface gradually shrinks toward the axis along the direction of increasing height.
The Mini LED module according to claim 1, wherein the bottom surface of the reflective lens is provided with mounting holes, and the light-emitting diodes are arranged in the corresponding mounting holes; the mounting holes extend upwards and have a height less than The height of the reflective lens.
The Mini LED module according to claim 1, wherein the density of the light transmission holes between any two adjacent reflective lenses gradually increases from the middle to both ends.
The Mini LED module according to claim 1, wherein the reflective lens and the transparent film are made of polyester resin.
The Mini LED module according to claim 6, wherein the reflective lens is integrally formed with the light-transmitting film.
The Mini LED module according to claim 1, wherein the Mini LED module also includes a PCB board and a backplane;

The PCB boards are provided with multiple pieces, each of the PCB boards is spliced with each other and arranged under the reflector, the light emitting diodes are arranged on the corresponding PCB boards, and the tops of each of the light emitting diodes are outside beyond the reflective sheet.
The Mini LED module according to claim 8, wherein the tops of the joints of any two adjacent PCB boards are covered by the astigmatism portion.
The Mini LED module according to claim 8, wherein the back plate is in the shape of a groove, and the PCB board is installed in the groove formed by the back plate.
The Mini LED module according to claim 10, wherein the Mini LED module further comprises:

a diffusion plate, the diffusion plate cover is arranged above the back plate to close the groove formed by the back plate;

A diaphragm, the diaphragm is a multi-layer thin film structure and attached to the diffuser plate.
The Mini LED module according to claim 5, wherein the density of the light-transmitting holes is realized by the number of the light-transmitting holes, and a small number of the light-transmitting holes are arranged in the middle area between the two reflective lenses. As for the light-transmitting holes, the number of the light-transmitting holes gradually increases from the middle area to both ends.
The Mini LED module according to claim 1, wherein the reflective lens and the transparent film are made of polystyrene or polycarbonate.
The Mini LED module according to claim 1, wherein the circumferential direction of the reflective lens is a smooth surface, so that the light reflected downward from the upper surface of the reflective lens is refracted along the circumferential direction of the reflective lens, so The circumferential direction is an arc surface on the circumferential side of the reflective lens.
A display device, including the Mini LED module according to any one of claims 1-14.