LED structure, LED lamp bead and backlight source

Abstract

The utility model discloses an LED structure, an LED lamp bead and a backlight source. The LED structure comprises a light emitting assembly and a light emitting control assembly which are arranged in a stacked mode. Wherein the light emitting control assembly is used for controlling the divergence angle of first emergent light rays of the light emitting assembly, so that the divergence angle of the first emergent light rays is converted into a second angle from a first angle, and the requirement of backlight application is met. The light emitting control assembly is directly added for a single LED chip to form a single LED structure, control over the light emitting divergence angle of the light emitting assembly can be achieved, and it is ensured that light emitting of the LED structure can meet backlight display. When the LED structure is used for forming a backlight source, additional structural layers such as a lens, a reflecting plate and a diffusion film do not need to be additionally arranged, the structure of the backlight source is further simplified, and cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of light sources, and particularly to an LED structure, an LED lamp bead, and a backlight source. Background Art

[0002] LED chips are widely used as light sources in display products. However, the light output of the chips has the characteristics of an extended light source and Lambertian characteristics, and cannot directly meet the requirements of backlight applications. Moreover, it is very difficult to perform optical shaping on them. Therefore, in an actual backlight system, devices such as complex lenses, reflectors, reflector cups, and diffusion films are required to control the light divergence angle. The existence of the above devices greatly increases the complexity of the backlight system and the cost is high.

[0003] Therefore, the current technology still needs to be improved. Summary of the Utility Model

[0004] This application provides an LED structure, an LED lamp bead, and a backlight source, which can effectively adjust the light divergence angle to simplify the backlight source structure and reduce costs.

[0005] This application provides an LED structure, including a light-emitting component and a light output control component arranged in a stacked manner;

[0006] Among them, the light output control component is used to control the divergence angle of the first emitted light rays of the light-emitting component, so that the divergence angle of the first emitted light rays is converted from a first angle to a second angle.

[0007] In the LED structure of some embodiments, the second angle is smaller than the first angle.

[0008] In the LED structure of some embodiments, the light output control component is used to control the first emitted light rays with an incident angle within a preset angle range to pass through.

[0009] In the LED structure of some embodiments, the light output control component includes a plurality of optically thin film layers arranged in a stacked manner, and the refractive indices between adjacent two optically thin film layers are different.

[0010] In the LED structure of some embodiments, the light output control component includes a first film layer and a second film layer arranged in a stacked manner, and the refractive index of the first film layer is different from that of the second film layer.

[0011] In the LED structure of some embodiments, the light output control component includes a plurality of first film layers and second film layers arranged alternately in a stacked manner, and the refractive index of the first film layer is different from that of the second film layer.

[0012] In the LED structure of some embodiments, the light output control component includes a first micro-structured layer.

[0013] In the LED structure in some embodiments, the first microstructure layer includes a plurality of microstructures, and the plurality of microstructures are arranged in an array.

[0014] In the LED structure in some embodiments, the first microstructure layer includes a plurality of microstructures, and the plurality of microstructures are nano-microstructures.

[0015] In the LED structure in some embodiments, the plurality of microstructures are arranged in a rectangular array, and the center distance between two adjacent microstructures is less than the wavelength of the first emitted light.

[0016] In the LED structure in some embodiments, the plurality of microstructures are arranged in a concentric circle array, and the interval between two adjacent concentric circles is less than the wavelength of the first emitted light.

[0017] In the LED structure in some embodiments, the LED structure further includes a light-emitting shaping component, and the light-emitting shaping component is stacked on the light-emitting control component;

[0018] Wherein, the light-emitting shaping component is used to shape the second emitted light processed by the light-emitting control component.

[0019] In the LED structure in some embodiments, the light-emitting shaping component includes a grating structure.

[0020] In the LED structure in some embodiments, the light-emitting shaping component includes a second microstructure layer.

[0021] In the LED structure in some embodiments, the light-emitting control component includes a second microstructure layer; the second microstructure layer includes a plurality of microstructures, and the plurality of microstructures are arranged in an array.

[0022] In the LED structure in some embodiments, the second microstructure layer includes a plurality of microstructures, and the shape of the microstructures is cylindrical or prismatic or hemispherical or pyramidal.

[0023] In the LED structure in some embodiments, the second microstructure layer includes a plurality of microstructures, and the plurality of microstructures are nano-microstructures.

[0024] In the LED lamp bead in some embodiments, it includes the above-mentioned LED structure.

[0025] The embodiment of the present application also provides a backlight source, and the backlight source includes a plurality of the above-mentioned LED structures.

[0026] An LED structure and a backlight provided by the present application. The LED structure includes a light-emitting component and a light output control component arranged in a stacked manner. Among them, the light output control component is used to control the divergence angle of the first emitted light of the light-emitting component, so that the divergence angle of the first emitted light is converted from a first angle to a second angle, so as to meet the requirements of backlight applications. In the present application, a light output control component is directly added to a single LED chip to form a single LED structure, which can control the light output divergence angle of the light-emitting component and ensure that the light output of the LED structure can meet backlight display requirements. When using this LED structure to form a backlight, there is no need to add additional structural layers such as lenses, reflectors, and diffusion films, thus simplifying the structure of the backlight and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following will, with reference to the accompanying drawings, make the technical solutions and other beneficial effects of the present application obvious through a detailed description of the specific embodiments of the present application.

[0028] Figure 1 Schematic diagram of the structure of the first embodiment of the LED structure provided by the embodiment of the present application.

[0029] Figure 2 Schematic diagram of the structure of the first embodiment of the light output control component in the LED structure provided by the embodiment of the present application.

[0030] Figure 3 Schematic diagram of the relationship between the incident angle of light and the transmittance in the light output control component of the LED structure provided by the embodiment of the present application.

[0031] Figure 4 Schematic diagram of the relationship between the incident angle of light and the energy of the emitted light in the light output control component of the LED structure provided by the embodiment of the present application.

[0032] Figure 5 Schematic diagram of optical interference of the optical thin film layer in the LED structure provided by the embodiment of the present application.

[0033] Figure 6 Provided by the embodiment of the present application Figure 2 Schematic diagram of light rays

[0034] Figure 7 Schematic diagram of the structure of the second embodiment of the light output control component in the LED structure provided by the embodiment of the present application.

[0035] Figure 8 Schematic diagram of a rectangular array arrangement of multiple microstructures in the LED structure provided by the embodiment of the present application.

[0036] Figure 9 Schematic diagram of a concentric circle array arrangement of multiple microstructures in the LED structure provided by the embodiment of the present application

[0037] Figure 10 Schematic diagram of the structure of the third embodiment of the light extraction control component in the LED structure provided by the embodiment of the present application.

[0038] Figure 11 Provided by the embodiment of the present application Figure 10 Schematic diagram of the light rays in

[0039] Figure 12 Schematic diagram of the structure of the second embodiment of the LED structure provided by the embodiment of the present application.

[0040] Figure 13 Schematic diagram of the structure of the first embodiment of the light extraction shaping component in the LED structure provided by the embodiment of the present application.

[0041] Figure 14 Top view of the partial structure of the second embodiment of the light extraction shaping component in the LED structure provided by the embodiment of the present application.

[0042] Figure 15 Stereoscopic diagram of the partial structure of the second embodiment of the light extraction shaping component in the LED structure provided by the embodiment of the present application;

[0043] Figure 16 Schematic diagram of the structure of the third embodiment of the light extraction shaping component in the LED structure provided by the embodiment of the present application.

[0044] Figure 17 Provided by the embodiment of the present application Figure 15 Schematic diagram of the light rays in

[0045] Figure 18 Schematic diagram of the structure of the fourth embodiment of the light extraction shaping component in the LED structure provided by the embodiment of the present application.

[0046] Figure 19 Provided by the embodiment of the present application Figure 18 Schematic diagram of the light rays in

[0047] Figure 20 Schematic diagram of the structure of the backlight provided by the embodiment of the present application.

[0048] Reference numerals:

[0049] 11. Light emitting component; 12. Light extraction control component; 121. Optical thin film layer; 13. Light extraction shaping component; 10. Substrate; 20. LED structure. Detailed implementation manners

[0050] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0051] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0052] Please refer to Figure 1 , this embodiment provides an LED structure, which includes a stacked light-emitting component 11 and a light-emitting control component 12; wherein, the light-emitting control component 12 is used to control the divergence angle of the first emitted light of the light-emitting component 11, so that the divergence angle of the first emitted light is converted from a first angle to a second angle to meet the requirements of backlight applications.

[0053] In this embodiment, a light-emitting control component 12 is directly added to a single LED chip to form a single LED structure, which can control the light-emitting divergence angle of the light-emitting component 11 and ensure that the light emitted by the LED structure can meet the requirements of backlight display. When using this LED structure to form a backlight source, there is no need to add additional structural layers such as lenses, reflectors, and diffusion films, thus simplifying the structure of the backlight source and reducing costs.

[0054] At the same time, when using this LED structure to form a backlight source, reducing the use of additional lens, reflector, and diffusion film layer structures can avoid the absorption or reflection of the light energy of the LED structure by the film layer, thereby reducing light energy loss, improving light utilization rate, reducing power consumption, and improving light efficiency.

[0055] In some embodiments, the light-emitting control component 12 is used to reduce the divergence angle of the first emitted light, that is, the second angle in this embodiment is smaller than the first angle. For example, the divergence angle of the first emitted light emitted by the light-emitting component 11 is [-45°, 45°], and after passing through the light-emitting control component 12, the emission angle of the first emitted light can be reduced to [-15°, 15°]; in this embodiment, by setting the light-emitting control component 12 to adjust the divergence angle of the first emitted light, it is beneficial to alleviate the display problems caused by the light-emitting expansion characteristics and Lambert characteristics of the LED component.

[0056] In some embodiments, the light output control component 12 is configured to control the first output light rays with incident angles within a preset angle range to pass through. For example, the preset angle range can be 15° to 35°, or less than 15°, etc. That is, the light output control component 12 in this embodiment has a decreasing transmittance as the incident angle increases. Then, when the incident angle of the first output light rays of the light emitting component 11 exceeds the preset angle range, they cannot pass through the light output control component 12. Thus, the light output control component 12 can filter out the first output light rays with large incident angles, thereby achieving control of the divergence angle of the first output light rays.

[0057] Please refer to Figure 2 , as an embodiment, the light output control component 12 includes a plurality of optically thin film layers 121 stacked on top of each other, and the refractive indices between adjacent two optically thin film layers 121 are different, thereby obtaining a film layer with a decreasing transmittance as the incident angle increases. For example, as Figure 3 shown, when the incident angle is greater than 10°, the transmittance drops sharply, while when the incident angle is less than 10°, the transmittance is close to 100%. Correspondingly, as Figure 4 shown, the smaller the absolute value of the incident angle of the light rays, the higher the energy of the output light rays corresponding to passing through the light output control component 12. When the incident angle is between -10° and 10°, the energy of the output light rays is higher. Thus, in this embodiment, the divergence angle of the first output light rays is controlled by depositing multiple optically thin film layers 121. Among them, the materials of adjacent two optically thin film layers 121 in the multiple optically thin film layers 121 are different, thereby making the refractive indices between adjacent two optically thin film layers 121 different. That is, there can be optically thin film layers 121 of multiple different materials in the multiple optically thin film layers 121.

[0058] Please refer to Figure 5 and Figure 6 , in this embodiment, the thickness of each optically thin film layer 121 can be adjusted so that the incident light rays at small angles interfere constructively, the transmittance increases, and all of them are transmitted; while the incident light rays at large angles interfere destructively, the transmittance decreases, and all of them are reflected. Therefore, for the first output light rays with a large divergence angle, after passing through the multiple optically thin film layers 121, only those with an incident angle within the preset angle range, such as less than 15°, can pass through, achieving a reduction in the divergence angle.

[0059] As an embodiment, the light output control component 12 can also include a plurality of first film layers and second film layers alternately stacked, and the refractive index of the first film layer is different from that of the second film layer. That is, in this embodiment, the light output control component 12 is only provided with two optically thin film layers 121 of different materials, and the two different optically thin film layers 121 are alternately stacked in multiple layers.

[0060] As another embodiment, the light output control component 12 includes a first film layer and a second film layer arranged in a stack, wherein the refractive index of the first film layer is different from that of the second film layer. That is, in this embodiment, the light output control component 12 is only provided with two optical thin film layers 121 made of different materials, and each of the two different optical thin film layers 121 is provided with one layer.

[0061] Please refer to Figure 7 together. In this embodiment, the thickness of the optical thin film layer can all adopt a thickness in the nanometer size. For example, the thickness of the optical thin film layer is sub-wavelength. By using a film layer at the nanometer size level, the interference and diffraction effects of light can be used to effectively adjust light. Specifically, for multiple film layers, the thickness of each film layer can be precisely adjusted so that the incident light within a specific angle range interferes constructively, and the transmittance increases, while the incident light in all other angle ranges interferes destructively, and the transmittance decreases and is all reflected. Therefore, for the first outgoing light with a large divergence angle, only the incident light with an incident angle within a preset angle range, such as between 15° and 35°, can pass through after passing through the multiple optical thin film layers 121, thereby realizing the regulation of a specific divergence angle.

[0062] As another embodiment, the light output control component 12 includes a first micro-structure layer, and the first micro-structure layer includes a plurality of micro-structures, and the shape of the micro-structures is cylindrical or prismatic or hemispherical or pyramidal. In this embodiment, the shapes of the plurality of micro-structures in the first micro-structure layer can be the same, that is, all the plurality of micro-structures in the first micro-structure layer are cylindrical or all are prismatic. Of course, there can be a combination of various different shapes among the plurality of micro-structures in the first micro-structure layer, that is, a part of the micro-structures in the first micro-structure layer are cylindrical in shape, and another part of the micro-structures are prismatic in shape. The present application does not make specific limitations on this. In this embodiment, the maximum center distance between the micro-structures is less than the wavelength of the outgoing light of the light emitting component 11, and the respective dimensions of the corresponding micro-structures are less than the wavelength of the outgoing light of the light emitting component 11, so as to facilitate reducing the light output divergence angle and realizing the regulation of the divergence angle.

[0063] In some embodiments, the first micro-structure layer includes a plurality of micro-structures, and the plurality of micro-structures are arranged in an array. For example, the plurality of micro-structures are arranged in a rectangular array, or can also be arranged in a concentric circle array, and the shape and size of each micro-structure are the same. Taking the shape of the micro-structure as cylindrical as an example: as Figure 8 shown, the plurality of micro-structures in the first micro-structure layer are arranged in a rectangular array, and p1 and p2 represent the center distance between two columns of micro-structures. As Figure 9 shown, the plurality of micro-structures in the first micro-structure layer are arranged in a concentric circle array, p3 is the interval between the micro-structure located at the center of the concentric circles and the adjacent concentric circle, and p4 is the interval between the second concentric circle and the third concentric circle.

[0064] As an embodiment, multiple microstructures are arranged in a rectangular array, and the center distance between two adjacent microstructures is less than the wavelength of the first emitted light; for example, the center distance is one-half or one-third of the wavelength. As Figure 8 shown, the center distance between two adjacent microstructures is as Figure 8 shown by p1 and p2 in

[0065] As an embodiment, multiple microstructures are arranged in a concentric circle array, and the interval between two adjacent concentric circles is less than the wavelength of the first emitted light; for example, the interval is one-half or one-third of the wavelength. As Figure 9 shown, the interval between two adjacent concentric circles is as Figure 9 shown by p3 and p4 in

[0066] In the embodiments of the present application, multiple microstructures are arranged in an array, and a certain arrangement period is formed between the microstructures. As Figure 10 and Figure 11 shown, taking the cylindrical microstructure array as an example, in this embodiment, by precisely controlling the arrangement period such as Figure 10 p0 in

[0067] or the size of each cylinder such as the height or radius of the cylinder, etc., the response of the array at different incident angles for a specific wavelength can be regulated. Specifically, when the incident angle is small, the resonant transmission condition of the sub-wavelength unit periodic structure is satisfied, and a very high transmittance is achieved. When the incident angle is large, the resonant transmission condition cannot be satisfied, and the transmittance is very low. Then, when the first emitted light with a large divergence angle passes through the microstructure array, only the incident angles within a preset angle range, such as less than 15°, can pass through, thereby achieving a reduction in the divergence angle.

[0068] Please refer to Figure 12, in some embodiments, the LED structure further includes a light output shaping component 13, which is stacked on the light output control component 12; wherein, the light output shaping component 13 is used to shape the second emitted light processed by the light output control component 12 to improve the light output uniformity.

[0069] In this embodiment, the light output shaping component 13 shapes the second emitted light to achieve beam shaping and improve the light output uniformity. Specifically, in this embodiment, by setting the light output shaping component 13, the spot uniformity of the LED structure can be adjusted, and the shape of the spot can be adjusted. For example, a square spot can be converted into a circular spot, or the divergence angle of the second emitted light can be finely adjusted on the basis of the light output control component 12. For example, the divergence angle of the second emitted light of 15° is finely adjusted to 18°.

[0070] As an embodiment, the light output shaping component 13 includes a grating structure, such as Figure 13 shown, the grating structure can be a symmetric planar annular grating structure. For this planar annular grating structure, it includes a plurality of annular sub-gratings, and the width of each annular sub-grating can be different, and they are arranged without regularity, that is, a non-periodic grating structure is formed; as Figure 14 and Figure 15 shown, it can also be a non-axisymmetric grating structure, and this application does not make any limitations on this. When setting a non-periodic grating structure, the outgoing direction of the incident light at each local position can be controlled, and finally the diffusion and light homogenization effect of the incident light can be achieved as a whole.

[0071] As an embodiment, the grating structure is a nano-grating structure. For the planar annular grating structure, the width of each annular sub-grating or the interval size between each annular sub-grating is of nano size; for the non-axisymmetric three-dimensional grating structure, the three-dimensional grating structure is a grating structure of nano size, so as to be easily adapted to the wavelength level of the LED structure, thereby improving the light output shaping effect.

[0072] As another embodiment, the light output shaping component 13 includes a second micro-structure layer; the second micro-structure layer includes a plurality of micro-structures, and the shape of the micro-structures is cylindrical or prismatic or hemispherical or pyramidal. In this embodiment, the shapes of the plurality of micro-structures in the second micro-structure layer can be the same, that is, the plurality of micro-structures in the second micro-structure layer are all cylindrical or all prismatic. Of course, there can be a combination of multiple different shapes among the plurality of micro-structures in the second micro-structure layer, that is, a part of the micro-structures in the second micro-structure layer are cylindrical and another part of the micro-structures are prismatic, and this application does not make specific limitations on this.

[0073] In some embodiments, the second microstructure layer includes a plurality of microstructures arranged in an array. For example, the plurality of microstructures are arranged in a rectangular array or can be arranged in a concentric circle array. If it is necessary to finely adjust the divergence angle of the second outgoing light to achieve the purpose of spot uniformity, the maximum center distance between the microstructures in the second microstructure layer in this embodiment can be greater than the wavelength of the outgoing light of the light-emitting component 11, and the respective dimensions of the corresponding microstructures are greater than the wavelength of the outgoing light of the light-emitting component 11 and less than the maximum center distance.

[0074] Please refer to Figure 16 and Figure 17 In the embodiments of the present application, a plurality of microstructures are arranged in an array, and a certain arrangement period is formed between the microstructures, so that the second microstructure layer has diffraction characteristics; a beam of incident light at a specific angle can be diffracted into multiple angles after passing through the structure layer, that is, on multiple diffraction orders, presenting a larger angular range of light output, playing a role in diffusion to make the spot uniform. At the same time, by precisely controlling the arrangement period or the size of the microstructures, the intensity of different diffraction orders can be adjusted, further realizing the function of diffusion and light homogenization.

[0075] In some embodiments, the microstructures in the second microstructure layer can have different sizes, such as Figure 18 the cylindrical microstructure layer shown, the diameters of the respective cylinders are different, and the intervals between the respective cylinders are also different, presenting an aperiodic structure arrangement. In this embodiment, by controlling the outgoing direction of the incident light at each local cylinder position, the diffusion and light homogenization of the overall incident light are finally realized, and the corresponding principle is as Figure 19 shown.

[0076] As an embodiment, the plurality of microstructures in the second microstructure layer are nano-microstructures; that is, the microstructures in the second microstructure layer are all microstructures of nano size. Taking the second microstructure layer as a cylindrical array structure as an example, the cylindrical structures in the second microstructure layer are all microstructures of nano size. In this embodiment, by setting the microstructures to structures of the same order of magnitude as the wavelength, that is, nano size structures, the effect of shaping the light output is ensured to be more significant.

[0077] The embodiments of the present application also provide an LED lamp bead, which includes a bracket structure and an LED structure disposed in the bracket structure. Since the LED structure has been described in detail above, it will not be elaborated here.

[0078] Please refer to Figure 20, an embodiment of the present application also discloses a backlight source, which includes a substrate 10, and a plurality of the above-mentioned LED structures 20 are attached to the substrate; since a light output control component and a light output shaping component are provided for each LED structure 20, the backlight source structure in this embodiment can omit structures such as a diffusion film, a reflector or a reflector cup, effectively simplifying the structure and manufacturing process of the backlight source, thereby reducing costs. At the same time, reducing the use of lens, reflector and diffusion film layer structures can avoid the absorption or reflection of the light energy of the LED structure 20 by the film layer, thereby reducing light energy loss and facilitating the improvement of visual effects; because the lens, reflector and diffusion film layer occupy a large volume and weight, reducing their settings can simplify the structure of the backlight source, reduce the overall volume and weight, and reduce the process difficulty and cost.

[0079] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0080] The LED structure provided by the embodiments of the present application has been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An LED structure, characterized in that, It includes a stacked light-emitting component and a light output control component; Among them, the light output control component is used to control the divergence angle of the first emitted light of the light-emitting component, so that the divergence angle of the first emitted light is converted from a first angle to a second angle.

2. The LED structure according to claim 1, wherein The second angle is smaller than the first angle.

3. The LED structure according to claim 1, wherein, The light output control component is used to control the first emitted light with an incident angle within a preset angle range to pass through.

4. The LED structure according to claim 1, wherein The light output control component includes a plurality of stacked optical thin film layers, and the refractive indices between adjacent two optical thin film layers are different.

5. The LED structure according to claim 1, wherein The light output control component includes a first film layer and a second film layer arranged in a stack, and the refractive index of the first film layer is different from that of the second film layer.

6. The LED structure according to claim 1, wherein, The light output control component includes a plurality of first film layers and second film layers alternately stacked, and the refractive index of the first film layer is different from that of the second film layer.

7. The LED structure according to claim 1, characterized in that, The light output control component includes a first micro-structure layer.

8. The LED structure according to claim 7, characterized in that, The first micro-structure layer includes a plurality of micro-structures, and the plurality of micro-structures are arranged in an array.

9. The LED structure according to claim 7, wherein, The first micro-structure layer includes a plurality of micro-structures, and the shape of the micro-structure is cylindrical or prismatic or hemispherical or pyramidal.

10. The LED structure according to claim 7, wherein The first micro-structure layer includes a plurality of micro-structures, and the plurality of micro-structures are nano-micro-structures.

11. The LED structure according to claim 8, wherein, The plurality of micro-structures are arranged in a rectangular array, and the center distance between adjacent two micro-structures is less than the wavelength of the first emitted light.

12. The LED structure according to claim 8, characterized in that, The plurality of micro-structures are arranged in a concentric circle array, and the interval between adjacent two concentric circles is less than the wavelength of the first emitted light.

13. The LED structure according to any one of claims 1-12, characterized in that, The LED structure further includes a light output shaping component, and the light output shaping component is stacked on the light output control component; Among them, the light output shaping component is used to shape the second emitted light processed by the light output control component.

14. The LED structure according to claim 13, wherein, The light output shaping component includes a grating structure.

15. The LED structure according to claim 13, wherein, The light output shaping component includes a second micro-structure layer.

16. The LED structure according to claim 13, wherein, The light output shaping component includes a second micro-structure layer, and the second micro-structure layer includes a plurality of micro-structures, and the plurality of micro-structures are arranged in an array.

17. The LED structure according to claim 15, wherein, The second micro-structure layer includes a plurality of micro-structures, and the shape of the micro-structure is cylindrical or prismatic or hemispherical or pyramidal.

18. The LED structure according to claim 15, characterized in that, The second micro-structure layer includes a plurality of micro-structures, and the plurality of micro-structures are nano-micro-structures.

19. An LED lamp bead, characterized in that, It includes the LED structure according to any one of claims 1-18.

20. A backlight, characterized in that, It includes a plurality of LED structures according to any one of claims 1-18.

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