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 reflection structure layer which are arranged in a laminated mode. The reflection structure layer comprises a plurality of sub-reflection structures, the plurality of sub-reflection structures are uniformly distributed on the light-emitting assembly, and interval areas are formed between the adjacent sub-reflection structures. The uniformity of the visual effect of the light source can be improved while the cost is saved.

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] In current backlight systems, devices such as lenses and reflectors are usually arranged on LED chips to control the light divergence angle and improve the spot uniformity to meet the application requirements of the display system. Specifically, a reflective structure is added to the chip; then, glue or an optical lens is used to control the divergence angle, and finally, the effect of uniform light source visual effect is achieved. However, the application of silicone or lenses increases the use cost. When the glue or lens is directly removed, there will be a problem of shadow above the center of the LED chip, which affects the uniformity of the light source visual effect.

[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 improve the uniformity of the light source visual effect while saving costs.

[0005] This application provides an LED structure, which includes a light-emitting component and a reflective structure layer arranged in a stacked manner;

[0006] The reflective structure layer includes a plurality of sub-reflective structures, and the plurality of sub-reflective structures are evenly distributed on the light-emitting component, and an interval area is formed between adjacent sub-reflective structures.

[0007] In the LED structure of some embodiments, the plurality of sub-reflective structures are in the shape of a rotationally symmetric figure.

[0008] In the LED structure of some embodiments, the plurality of sub-reflective structures are in the shape of a centrally symmetric figure.

[0009] In the LED structure of some embodiments, the sub-reflective structure includes a plurality of optically thin film layers arranged in a stacked manner, and the refractive indexes between adjacent two optically thin film layers are different.

[0010] In the LED structure of some embodiments, the sub-reflective structure 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.

[0011] In the LED structure of some embodiments, the sub-reflective structure 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.

[0012] In the LED structure of some embodiments, the sub-reflective structure includes a distributed Bragg reflector structure.

[0013] In the LED structure in some embodiments, the sub-reflection structure includes a microstructure layer, and the microstructure layer includes a plurality of microstructures.

[0014] In the LED structure in some embodiments, the plurality of microstructures are arranged in an array.

[0015] In the LED structure in some embodiments, the shape of the microstructure is cylindrical or prismatic or hemispherical or pyramidal.

[0016] An embodiment of the present application further provides an LED structure, which includes a light-emitting component and a reflection structure layer arranged in a stacked manner; the reflection structure layer includes a plurality of first sub-reflection structures and a plurality of second sub-reflection structures, and the first sub-reflection structures and the second sub-reflection structures are alternately arranged on the light-emitting component;

[0017] Among them, the light transmittance of the first sub-reflection structure is different from the light transmittance of the second sub-reflection structure.

[0018] In the LED structure in some embodiments, both the first sub-reflection structure and the second sub-reflection structure include a plurality of optically thin film layers arranged in a stacked manner, and the refractive index between adjacent two optically thin film layers is different; among them, in the stacking direction, the thickness of the first sub-reflection structure is different from the thickness of the second sub-reflection structure.

[0019] In the LED structure in some embodiments, both the first sub-reflection structure and the second sub-reflection structure include 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 the refractive index of the second film layer; among them, in the stacking direction, the thickness of the first sub-reflection structure is different from the thickness of the second sub-reflection structure.

[0020] In the LED structure in some embodiments, both the first sub-reflection structure and the second sub-reflection structure include a distributed Bragg reflection structure; among them, in the stacking direction, the thickness of the first sub-reflection structure is different from the thickness of the second sub-reflection structure.

[0021] An embodiment of the present application further provides an LED lamp bead, and the LED lamp bead includes the above-mentioned LED structure.

[0022] An embodiment of the present application further provides a backlight, and the backlight includes a substrate, and the above-mentioned LED structure is arranged on the substrate.

[0023] In the backlight in some embodiments, a plurality of LED structures are arranged in a preset direction, and the reflection structure layers in each LED structure are the same.

[0024] An embodiment of the present application further provides a backlight, and the backlight includes a plurality of the above-mentioned LED lamp beads.

[0025] An LED structure, an LED lamp bead, and a backlight provided by the present application. The LED structure includes a light-emitting component and a reflection structure layer arranged in a stacked manner. The reflection structure layer includes a plurality of sub-reflection structures, which are evenly distributed on the light-emitting component, and an interval region is formed between adjacent sub-reflection structures; the reflection regions and the interval regions are arranged alternately. Compared with the case where the same reflection structure is provided throughout the light-emitting component, it can make the regions with brighter light output and the regions with darker light output of the entire LED structure form a complement. Thus, it is possible to avoid the appearance of a shadow above the center of the LED structure compared with the periphery of the LED structure, thereby improving the visual effect uniformity of the entire LED structure. At the same time, the setting of silicone or a lens can be omitted, thereby saving the usage cost of silicone or a lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following will, by describing the specific embodiments of the present application in detail with reference to the accompanying drawings, make the technical solutions and other beneficial effects of the present application obvious.

[0027] Figure 1 It is a cross-sectional schematic diagram of the LED structure provided by an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the first embodiment of the reflection structure layer in the LED structure provided by an embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the second embodiment of the reflection structure layer in the LED structure provided by an embodiment of the present application.

[0030] Figure 4 It is a schematic diagram of the third embodiment of the reflection structure layer in the LED structure provided by an embodiment of the present application.

[0031] Figure 5 It is a schematic diagram of the fourth embodiment of the reflection structure layer in the LED structure provided by an embodiment of the present application.

[0032] Figure 6 It is a schematic diagram of the fifth embodiment of the reflection structure layer in the LED structure provided by an embodiment of the present application.

[0033] Figure 7 It is a cross-sectional schematic diagram of the first embodiment of the sub-reflection structure in the LED structure provided by an embodiment of the present application.

[0034] Figure 8 It is an optical interference schematic diagram of the optical thin film layer provided by an embodiment of the present application.

[0035] Figure 9 It is a top view schematic diagram of the second embodiment of the sub-reflection structure in the LED structure provided by an embodiment of the present application.

[0036] Figure 10 The top view schematic diagram of the third embodiment of the sub-reflection structure in the LED structure provided by the embodiment of the present application.

[0037] Figure 11 The schematic diagram of the sixth embodiment of the reflection structure layer in the LED structure provided by the embodiment of the present application.

[0038] Figure 12 The layout schematic diagram of the LED structure in the backlight provided by the embodiment of the present application.

[0039] Reference numerals:

[0040] 10, light-emitting component; 20, reflection structure layer;

[0041] 11, back reflection layer; 12, light-emitting layer; 13, substrate; 201, sub-reflection structure; 202, spacer region; 2011, optical thin film layer; 21, first sub-reflection structure; 22, second sub-reflection structure. Detailed implementation manners

[0042] 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.

[0043] 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.

[0044] Please refer to Figure 1 , this embodiment provides an LED structure, which includes a light-emitting component 10 and a reflection structure layer 20 arranged in a stacked manner. Among them, the light-emitting component 10 includes a back reflection layer 11, a light-emitting layer 12 and a substrate 13 arranged in a stacked manner. Taking the direction of the light-emitting component 10 facing the reflection structure layer 20 as the light-emitting direction of the LED structure, the reflection structure layer 20 is arranged in a stacked manner close to the substrate 13 side. In this embodiment, the light emitted from the light-emitting layer 12 is at least partially reflected to the back reflection layer 11 by the reflection structure layer 20, and then emitted after being reflected again by the back reflection layer 11, which is beneficial to increasing the light-emitting divergence angle of the LED structure.

[0045] Please refer to together Figure 2, the reflection structure layer 20 includes a plurality of sub - reflection structures 201. The plurality of sub - reflection structures 201 are evenly distributed on the light - emitting component 10, and an interval region 202 is formed between adjacent sub - reflection structures 201. In this embodiment, the interval region 202 is the region where no sub - reflection structure 201 is provided. Then, the reflection region needs to at least partially reflect light with respect to the interval region 202. As a result, the brightness of the reflection region is relatively darker than that of the interval region 202, and the brightness of a part of the interval region 202 is relatively brighter. In this embodiment, the plurality of sub - reflection structures 201 are evenly distributed on the light - emitting component 10, forming an alternating arrangement with the interval region 202. Compared with the case where the same reflection structure is provided throughout the light - emitting component 10, it can make the brighter - light - emitting region and the darker - light - emitting region of the entire LED structure complement each other. Thus, while ensuring that the LED structure can increase the divergence angle, it can also avoid the appearance of a shadow above the center of the LED structure compared with the surrounding of the LED structure, thereby improving the visual effect uniformity of the entire LED structure.

[0046] At the same time, in this embodiment, a plurality of sub - reflection structures 201 are evenly arranged on the light - emitting component 10, improving the visual effect uniformity. The setting of silicone or lens can be omitted. Thus, on the one hand, it can save the usage cost of silicone or lens; on the other hand, reducing the use of additional silicone or lens can avoid the absorption or reflection of the light energy of the light - emitting component 10 by the silicone or lens itself, thereby reducing the light energy loss, improving the light utilization rate, reducing the power consumption, and thus also achieving the purpose of improving the light effect and visual effect.

[0047] In some embodiments, the shapes of each sub - reflection structure 201 are the same. As Figure 2 shown, in this embodiment, each sub - reflection structure 201 is rectangular, and the shapes and sizes of each sub - reflection structure 201 are the same. Correspondingly, the orthographic projection areas of each sub - reflection structure 201 on the light - emitting component 10 are the same. Correspondingly, each sub - reflection structure 201 is evenly distributed, and the interval region 202 between the sub - reflection structures 201 is also rectangular. At this time, the shape and size of the interval region 202 are the same as those of the reflection region, forming a structural complementarity, and further forming a complementarity of light pattern brightness and darkness, so as to improve the uniformity of the light - emitting visual effect of the LED structure.

[0048] In some embodiments, the shapes of the sub - reflection structures 201 can also be different. As Figure 3 shown, the sub - reflection structure 201 arranged at the central position of the light - emitting component 10 is rectangular, and there are rectangular - shaped sub - reflection structures 201 arranged at intervals around the periphery. Thus, an alternating arrangement between the reflection region and the interval region 202 can also be formed, so as to improve the uniformity of the light - emitting visual effect of the LED structure.

[0049] In some embodiments, the sub-reflection structures 201 have the same shape but different sizes. As Figure 4 shown, each sub-reflection structure 201 is in a shape of a double-square frame, and each double-square frame is arranged to spread outwards from the center of the light-emitting component 10, forming an alternating arrangement with the spacer regions 202, so as to improve the uniformity of the light-emitting visual effect of the LED structure.

[0050] In some embodiments, the reflection regions and the spacer regions 202 formed by each sub-reflection structure 201 are both rectangular. As Figure 5 shown, the spacer regions 202 and the reflection regions are arranged alternately, and there is no connection point between each sub-reflection structure 201 during the arrangement. At this time, the spacer regions 202 and the reflection regions may have the same shape and size, so as to improve the uniformity of the light-emitting visual effect of the LED structure.

[0051] In some embodiments, multiple sub-reflection structures 201 form a rotationally symmetric figure shape. As Figure 6 shown, after multiple sub-reflection structures 201 are rotated by a certain angle around the center point of the reflection structure layer 20, they can coincide with themselves. The side of the light-emitting component 10 facing the light-emitting direction can be equally divided into a plurality of regions along the center point, such as equally dividing into 4 regions, 6 regions, etc. If it is equally divided into 4 regions, two of the regions are provided with sub-reflection structures 201; if it is equally divided into 6 regions, three of the regions are provided with sub-reflection structures 201, and the sub-reflection structures 201 are spaced from each other to form a structural complementarity, thereby forming a complementarity of light pattern brightness and darkness, so as to avoid the appearance of a dark shadow above the center of the LED structure while the periphery of the LED structure is brighter, so as to improve the visual effect uniformity of the LED structure.

[0052] In some embodiments, multiple sub-reflection structures 201 can also form a centrally symmetric figure shape, so that the reflection regions and the spacer regions 202 form a structural complementarity, thereby forming a complementarity of light pattern brightness and darkness, so as to improve the visual effect uniformity of the LED structure.

[0053] Please refer to Figure 7 and Figure 8 together. In some embodiments, the sub-reflection structure 201 includes a plurality of optically thin film layers 2011 arranged in a stacked manner, and the refractive indices between adjacent two optically thin film layers 2011 are different. In this embodiment, the thickness of each optically thin film layer 2011 can be adjusted so that the incident light at a small angle undergoes constructive interference, the transmittance increases, and all of it is transmitted; while the incident light at a large angle undergoes destructive interference, the transmittance decreases, and all of it is reflected. Therefore, the incident light with a large divergence angle is reflected, so as to increase the light-emitting divergence angle of the LED structure.

[0054] In some embodiments, the sub-reflection structure 201 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. That is, in this embodiment, the sub-reflection structure 201 is only provided with optical thin film layers 2011 of two different materials, and the two different optical thin film layers 2011 are alternately stacked in multiple layers.

[0055] In some embodiments, the sub-reflection structure 201 includes a first film layer and a second film layer stacked, wherein the refractive index of the first film layer is different from that of the second film layer. That is, in this embodiment, the sub-reflection structure 201 is only provided with optical thin film layers 2011 of two different materials, and one layer of each of the two different optical thin film layers 2011 is provided.

[0056] In some embodiments, the sub-reflection structure 201 includes a distributed Bragg reflection structure.

[0057] In some embodiments, the sub-reflection structure 201 includes a microstructure layer, and the microstructure layer includes a plurality of microstructures. The shape of the microstructures is cylindrical or prismatic or hemispherical or pyramidal, etc. In this embodiment, the shapes of the plurality of microstructures may be the same, such as all being cylindrical or all being prismatic. A plurality of microstructures may have a combination of various different shapes, that is, some of the plurality of microstructures are cylindrical in shape, and some of the other microstructures are prismatic in shape. This application does not make specific limitations in this regard. In this embodiment, the maximum center distance between the microstructures is less than the wavelength of the outgoing light of the light-emitting component 10, and the respective dimensions of the corresponding microstructures are less than the wavelength of the outgoing light of the light-emitting component 10, so as to facilitate effective reflection of light.

[0058] In this embodiment, the reflection effect of the microstructure layer can be adjusted by adjusting the dimensions of the microstructures, such as adjusting the height and thickness of the cylindrical microstructures, and the height and bottom side length of the pyramidal microstructures.

[0059] In some embodiments, the plurality of microstructures are arranged in an array. For example, the plurality of microstructures are arranged in a rectangular array, as Figure 9 shown, or may be arranged in a concentric circle array, as Figure 10 shown. Similarly, in this embodiment, the plurality of microstructures are arranged in an array, and a certain arrangement period is formed between the microstructures. When the plurality of microstructures are arranged in a rectangular array, the arrangement period corresponds to the center distance between the microstructures, as Figure 9 shown by p1 and p2 in. When the plurality of microstructures are arranged in a concentric circle array, the arrangement period corresponds to the interval between the concentric circles, as Figure 10 shown by p3 and p4 in. This arrangement period is less than the wavelength of the outgoing light of the light-emitting component 10, that is, p1 and p2 are the same and less than the wavelength of the outgoing light of the light-emitting component 10, or p3 and p4 are the same and less than the wavelength of the outgoing light of the light-emitting component 10, so as to facilitate effective reflection of light.

[0060] Please refer to Figure 11 Figure 11 Also provided in an embodiment of the present application is an LED structure, which includes a stacked light-emitting component and a reflective structure layer. The reflective structure layer includes a plurality of first sub-reflective structures 21 and a plurality of second sub-reflective structures 22, and the first sub-reflective structures 21 and the second sub-reflective structures 22 are alternately arranged on the light-emitting component. Correspondingly, the light-emitting component includes a back-reflective layer, a light-emitting layer, and a substrate that are stacked. The direction of the light-emitting component facing the reflective structure layer is taken as the light-emitting direction of the LED structure, and the reflective structure layer is stacked close to the substrate side. In this embodiment, at least part of the light emitted by the light-emitting layer is reflected to the back-reflective layer by the reflective structure layer and then emitted after being reflected again by the back-reflective layer, which is beneficial to increasing the light-emitting divergence angle of the LED structure.

[0061]

[0061] Among them, the light transmittance of the first sub-reflective structure 21 is different from that of the second sub-reflective structure 22. For example, the light transmittance of the first sub-reflective structure 21 is less than that of the second sub-reflective structure 22, or the reflection effect of the first sub-reflective structure 21 is better than that of the second sub-reflective structure 22. Then the light brightness of the area corresponding to the first sub-reflective structure 21 is relatively darker than that of the area corresponding to the second sub-reflective structure 22. At this time, the first sub-reflective area and the second sub-reflective area are alternately arranged to form a complementarity in structure, and the corresponding light patterns are bright and dark to form a complementarity; compared with setting the same reflective structure on the entire light-emitting component, it can make the area with brighter light-emitting brightness and the area with darker light-emitting brightness of the entire LED structure form a complementarity. Thus, while ensuring that the LED structure can increase the divergence angle, it can also avoid the appearance of a shadow above the center of the LED structure compared with the periphery of the LED structure, thereby improving the visual effect uniformity of the entire LED structure.

[0062]

[0062] At the same time, in this embodiment, the first sub-reflective structure 21 and the second sub-reflective structure 22 are alternately arranged on the light-emitting component to improve the visual effect uniformity, and the setting of silicone or a lens can be omitted. Thus, on the one hand, the use cost of silicone or a lens can be saved; on the other hand, reducing the use of additional silicone or a lens can avoid the absorption or reflection of the light energy of the light-emitting component by the silicone or the lens itself, thereby reducing the light energy loss, improving the light utilization rate, reducing the power consumption, and thus can also achieve the purpose of improving the light efficiency and visual effect.

[0063]

[0063] It should be noted that the arrangement layout of the first sub-reflective structure 21 and the second sub-reflective structure 22 on the light-emitting component in this embodiment is the same as the layout of the above-mentioned sub-reflective structure, that is, the reflective area and the interval area. Therefore, the arrangement layout between the first sub-reflective structure 21 and the second sub-reflective structure 22 will not be elaborated here.

[0064] In some embodiments, both the first sub-reflection structure 21 and the second sub-reflection structure 22 include 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; wherein, in the stacking direction, the thickness of the first sub-reflection structure 21 is different from the thickness of the second sub-reflection structure 22. In this embodiment, the light transmittance of the two reflection structures can be adjusted by adjusting the thickness of the first reflection structure and the thickness of the second sub-reflection structure 22, so as to facilitate the complementarity of the light pattern brightness and darkness in the LED structure, thereby improving the uniformity of the visual effect.

[0065] In some embodiments, both the first sub-reflection structure 21 and the second sub-reflection structure 22 include a first film layer and a second film layer arranged alternately in a stacked manner, and the refractive index of the first film layer is different from the refractive index of the second film layer; wherein, in the stacking direction, the thickness of the first sub-reflection structure 21 is different from the thickness of the second sub-reflection structure 22. That is, in this embodiment, both the first sub-reflection structure 21 and the second sub-reflection structure 22 can be provided with only two optically thin film layers of different materials, and the two different optically thin film layers are alternately stacked in multiple layers.

[0066] In some embodiments, both the first sub-reflection structure 21 and the second sub-reflection structure 22 include a distributed Bragg reflection structure; wherein, in the stacking direction, the thickness of the first sub-reflection structure 21 is different from the thickness of the second sub-reflection structure 22. In this embodiment, the light transmittance of the two reflection structures, that is, the reflection effect of the two reflection structures, can be adjusted by adjusting the thickness of the first reflection structure and the thickness of the second sub-reflection structure 22, so as to facilitate the complementarity of the light pattern brightness and darkness in the LED structure, thereby improving the uniformity of the visual effect.

[0067] In other embodiments, either the first sub-reflection structure 21 or the second sub-reflection structure 22 can also be a microstructure layer, and the microstructure layer includes a plurality of microstructures, and the structure of the microstructure layer can be the same as the structure when the microstructure layer is provided in the above-mentioned sub-reflection structure. Therefore, the specific structure when the first sub-reflection structure 21 or the second sub-reflection structure 22 includes a microstructure layer will not be elaborated here. Among them, in this embodiment, the different reflection effects of the first sub-reflection structure 21 and the second sub-reflection structure 22 can be adjusted by adjusting the size or shape of the microstructures in the microstructure layer, so as to achieve different light transmittances and ensure the complementarity of the light pattern brightness and darkness.

[0068] The embodiment of the present application also provides an LED lamp bead, and the LED lamp bead includes the above-mentioned LED structure. Since the above LED structure has been described in detail, it will not be elaborated here.

[0069] The embodiment of the present application also provides a backlight, and the backlight includes a substrate, and a plurality of the above-mentioned LED structures are arranged on the substrate. Since the above LED structure has been described in detail, it will not be elaborated here.

[0070] In some embodiments, as Figure 12 shown, multiple LED structures 1 in the backlight source are arranged in a preset direction, and the reflection structure layers in each LED structure 1 are the same. In the same backlight source, the reflection structure layer of the LED structure 1 all includes multiple sub-reflection structures, or the reflection layer of the LED structure 1 all includes multiple first sub-reflection structures or second sub-reflection structures. When the reflection structure layer of the LED structure 1 in the backlight source includes multiple sub-reflection structures, then the arrangements of the multiple sub-reflection structures in the corresponding LED structures 1 can also be the same; when the reflection structure layer of the LED structure 1 in the backlight source includes multiple first sub-reflection structures and multiple second sub-reflection structures, then the arrangements of the first sub-reflection structures and the second sub-reflection structures in the corresponding LED structures 1 can also be the same. Thus, it is ensured that the overall reflection area and the interval area of the backlight source or the first sub-reflection structures and the second sub-reflection structures form a complementarity, so as to facilitate the complementarity of the overall light pattern in terms of light and darkness, and further improve the uniformity of the visual effect of the backlight source.

[0071] As an embodiment, any LED structure can coincide with other LED structures after translation, that is, in this embodiment, the sizes of each LED structure can be the same, and when the reflection area and the interval area in each LED structure are arranged in the same way, or when the first sub-reflection structures and the second sub-reflection structures in each LED structure are arranged in the same way, thus it can be ensured that the reflection area and the interval area structures between the LED structures can form a complementarity, so as to facilitate the complementarity of the overall light pattern in terms of light and darkness, and further improve the uniformity of the visual effect of the backlight source.

[0072] The embodiment of the present application also provides a backlight source, which includes multiple LED lamp beads as described above, and each LED lamp bead is correspondingly provided with the LED structure as described above. Since the LED structure has been described in detail above, it will not be elaborated here.

[0073] Among them, the structures of each LED lamp bead in the backlight source can be the same, and the corresponding reflection structures in each LED structure are the same. When the reflection structure layer of the LED structure in the backlight source includes multiple sub-reflection structures, then the arrangements of the multiple sub-reflection structures in the corresponding LED structures can also be the same; when the reflection structure layer of the LED structure in the backlight source includes multiple first sub-reflection structures and multiple second sub-reflection structures, then the arrangements of the first sub-reflection structures and the second sub-reflection structures in the corresponding LED structures can also be the same. Thus, it is ensured that the overall reflection area and the interval area of the backlight source or the first sub-reflection structures and the second sub-reflection structures form a complementarity, so as to facilitate the complementarity of the overall light pattern in terms of light and darkness, and further improve the uniformity of the visual effect of the backlight source.

[0074] In the above embodiments, the descriptions of the respective embodiments each have their own emphasis. For parts not elaborated in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0075] The LED structure provided by the embodiments of the present application has been introduced in detail above. Specific examples are used herein 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 for 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, The LED structure includes a light-emitting component and a reflection structure layer arranged in a stacked manner; The reflection structure layer includes a plurality of sub-reflection structures, and the plurality of sub-reflection structures are uniformly distributed on the light-emitting component, and an interval region is formed between adjacent sub-reflection structures.

2. The LED structure according to claim 1, wherein The plurality of sub-reflection structures are in the shape of a rotationally symmetric figure.

3. The LED structure according to claim 1, wherein, The plurality of sub-reflection structures are in the shape of a centrally symmetric figure.

4. The LED structure according to claim 1, wherein, The sub-reflection structure 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.

5. The LED structure according to claim 1, characterized in that The sub-reflection structure 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.

6. The LED structure according to claim 1, wherein The sub-reflection structure 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.

7. The LED structure according to claim 1, wherein The sub-reflection structure includes a distributed Bragg reflection structure.

8. The LED structure according to claim 1, wherein The sub-reflection structure includes a microstructure layer, and the microstructure layer includes a plurality of microstructures.

9. The LED structure according to claim 8, wherein, The plurality of microstructures are arranged in an array.

10. The LED structure according to claim 8, wherein, The shape of the microstructure is cylindrical or prismatic or hemispherical or pyramidal.

11. An LED structure, characterized in that, The LED structure includes a light-emitting component and a reflection structure layer arranged in a stacked manner; the reflection structure layer includes a plurality of first sub-reflection structures and a plurality of second sub-reflection structures, and the first sub-reflection structures and the second sub-reflection structures are arranged alternately on the light-emitting component; Wherein, the light transmittance of the first sub-reflection structure is different from that of the second sub-reflection structure.

12. The LED structure according to claim 11, wherein, Both the first sub-reflection structure and the second sub-reflection structure include 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; wherein, in the stacking direction, the thickness of the first sub-reflection structure is different from that of the second sub-reflection structure.

13. The LED structure according to claim 11, wherein, Both the first sub-reflection structure and the second sub-reflection structure include 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; wherein, in the stacking direction, the thickness of the first sub-reflection structure is different from that of the second sub-reflection structure.

14. The LED structure according to claim 11, wherein, Both the first sub-reflection structure and the second sub-reflection structure include a distributed Bragg reflection structure; wherein, in the stacking direction, the thickness of the first sub-reflection structure is different from that of the second sub-reflection structure.

15. An LED lamp bead, characterized in that, The LED lamp bead includes the LED structure according to any one of claims 1-14.

16. A backlight source, characterized in that, The backlight includes a substrate, and a plurality of LED structures according to any one of claims 1-14 are arranged on the substrate.

17. The backlight according to claim 16, wherein The plurality of LED structures are arranged in a preset direction, and the reflection structure layers in each LED structure are the same.

18. A backlight, characterized in that, The backlight includes a plurality of LED lamp beads according to claim 15.

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