LED structure, LED lamp bead, and backlight source

Abstract

The present application discloses an LED structure, an LED lamp bead, and a backlight source. The LED structure comprises a light-emitting assembly and a reflective structure layer that are stacked. The reflective structure layer comprises a plurality of sub-reflective structures, the plurality of sub-reflective structures are uniformly distributed on the light-emitting assembly, and a spacing region is formed between adjacent sub-reflective structures.

Description

An LED structure, LED chips and backlight

[0001] This application claims priority to Chinese Patent Application No. 202411220161.1, filed on August 30, 2024, entitled "An LED Structure, LED Beads and Backlight", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of light source technology, specifically to an LED structure, LED beads, and a backlight. Background Technology

[0003] In current backlight systems, lenses, reflectors, and other devices are typically added to the LED chip to control the divergence angle of the light source and improve the uniformity of the light spot in order to meet the application requirements of the display system. Specifically, a reflective structure is added to the chip; then, adhesive or optical lenses are used to control the divergence angle, ultimately achieving a uniform visual effect of the light source. Technical issues

[0004] However, the application of silicone or lenses increases the cost of use, and if the glue or lens is removed directly, a shadow will appear above the center of the LED chip, affecting the uniformity of the light source's visual effect. Technical solutions

[0005] This application provides an LED structure, LED beads, and backlight that can improve the uniformity of light source visual effect while saving costs.

[0006] This application provides an LED structure, which includes a stacked light-emitting component and a reflective structure layer;

[0007] The reflective structure layer includes multiple sub-reflective structures, which are evenly distributed on the light-emitting component, and there are gaps between adjacent sub-reflective structures.

[0008] In some embodiments of the LED structure, the multiple sub-reflective structures are arranged in a rotationally symmetric shape.

[0009] In some embodiments of the LED structure, the multiple sub-reflective structures are arranged in a centrally symmetrical shape.

[0010] In some embodiments of the LED structure, the sub-reflection structure includes multiple stacked optical thin film layers, and the refractive indices of adjacent optical thin film layers are different.

[0011] In some embodiments of the LED structure, the sub-reflection structure includes a plurality of alternatingly stacked first and second film layers, wherein the refractive indices of the first and second film layers are different.

[0012] In some embodiments of the LED structure, the sub-reflection structure includes a first film layer and a second film layer stacked together, wherein the refractive indices of the first film layer and the second film layer are different.

[0013] In some embodiments of the LED structure, the sub-reflection structure includes a distributed Bragg reflector structure.

[0014] In some embodiments of the LED structure, the sub-reflective structure includes a microstructure layer, which includes a plurality of microstructures.

[0015] In some embodiments of the LED structure, multiple microstructures are arranged in an array.

[0016] In some embodiments of the LED structure, the microstructure is cylindrical, prismatic, hemispherical, or pyramidal in shape.

[0017] This application embodiment also provides an LED structure, which includes a light-emitting component and a reflective structure layer stacked together; the reflective structure layer includes a plurality of first sub-reflective structures and a plurality of second sub-reflective structures, the first sub-reflective structures and the second sub-reflective structures being alternately arranged on the light-emitting component;

[0018] The light transmittance of the first sub-reflection structure is different from that of the second sub-reflection structure.

[0019] In some embodiments of the LED structure, both the first sub-reflective structure and the second sub-reflective structure include multiple stacked optical thin film layers, and the refractive indices of adjacent optical thin film layers are different; wherein, in the stacking direction, the thickness of the first sub-reflective structure is different from the thickness of the second sub-reflective structure.

[0020] In some embodiments of the LED structure, both the first sub-reflective structure and the second sub-reflective structure include multiple alternating layers of first and second films, the refractive indices of the first and second films being different; wherein, in the stacking direction, the thickness of the first sub-reflective structure is different from the thickness of the second sub-reflective structure.

[0021] In some embodiments of the LED structure, both the first sub-reflective structure and the second sub-reflective structure include a distributed Bragg reflective structure; wherein, in the stacking direction, the thickness of the first sub-reflective structure is different from the thickness of the second sub-reflective structure.

[0022] This application embodiment also provides an LED lamp bead, which includes an LED structure; the LED structure includes a light-emitting component and a reflective structure layer stacked together.

[0023] The reflective structure layer includes multiple sub-reflective structures, which are evenly distributed on the light-emitting component, and there are gaps between adjacent sub-reflective structures.

[0024] This application embodiment also provides an LED lamp bead, which includes an LED structure; the LED structure includes a light-emitting component and a reflective structure layer stacked together.

[0025] The reflective structure layer includes multiple first sub-reflective structures and multiple second sub-reflective structures, which are alternately arranged on the light-emitting component.

[0026] The light transmittance of the first sub-reflection structure is different from that of the second sub-reflection structure.

[0027] This application embodiment also provides a backlight source, which includes a substrate on which a plurality of LED structures are disposed;

[0028] An LED structure includes stacked light-emitting components and a reflective structure layer;

[0029] The reflective structure layer includes multiple sub-reflective structures, which are evenly distributed on the light-emitting component, and there are gaps between adjacent sub-reflective structures.

[0030] This application embodiment also provides a backlight source, which includes a substrate on which a plurality of LED structures are disposed;

[0031] An LED structure includes stacked light-emitting components and a reflective structure layer;

[0032] The reflective structure layer includes multiple first sub-reflective structures and multiple second sub-reflective structures, which are alternately arranged on the light-emitting component.

[0033] The light transmittance of the first sub-reflection structure is different from that of the second sub-reflection structure.

[0034] In some embodiments of the backlight, multiple LED structures are arranged in a preset direction, and the reflective structure layers in each LED structure are identical.

[0035] This application embodiment also provides a backlight source, which includes a plurality of LED beads, each LED bead including an LED structure; the LED structure includes a stacked light-emitting component and a reflective structure layer.

[0036] The reflective structure layer includes multiple sub-reflective structures, which are evenly distributed on the light-emitting component, and there are gaps between adjacent sub-reflective structures. Beneficial effects

[0037] This application provides an LED structure, LED chips, and a backlight. The LED structure includes a stacked light-emitting component and a reflective structure layer. The reflective structure layer includes multiple sub-reflective structures, which are uniformly distributed on the light-emitting component, with gaps between adjacent sub-reflective structures. The reflective areas and gaps are arranged alternately, allowing brighter areas and dimmer areas of the LED structure to complement each other, compared to using identical reflective structures on the entire light-emitting component. This avoids shadows above the center of the LED structure compared to its surroundings, thus improving the visual uniformity of the entire LED structure. Simultaneously, the use of silicone or lenses can be omitted, thereby saving on the cost of silicone or lenses. Attached Figure Description

[0038] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0039] Figure 1 is a cross-sectional schematic diagram of the LED structure provided in an embodiment of this application.

[0040] Figure 2 is a schematic diagram of the first embodiment of the reflective structure layer in the LED structure provided in this application.

[0041] Figure 3 is a schematic diagram of a second embodiment of the reflective structure layer in the LED structure provided in this application.

[0042] Figure 4 is a schematic diagram of the third embodiment of the reflective structure layer in the LED structure provided in this application.

[0043] Figure 5 is a schematic diagram of the fourth embodiment of the reflective structure layer in the LED structure provided in this application.

[0044] Figure 6 is a schematic diagram of the fifth embodiment of the reflective structure layer in the LED structure provided in this application.

[0045] Figure 7 is a cross-sectional schematic diagram of the first embodiment of the neutron reflection structure in the LED structure provided in this application.

[0046] Figure 8 is a schematic diagram of optical interference of the optical thin film layer provided in the embodiment of this application.

[0047] Figure 9 is a top view schematic diagram of the second embodiment of the neutron reflection structure in the LED structure provided in this application.

[0048] Figure 10 is a top view schematic diagram of the third embodiment of the neutron reflection structure in the LED structure provided in this application.

[0049] Figure 11 is a schematic diagram of the sixth embodiment of the reflective structure layer in the LED structure provided in this application.

[0050] Figure 12 is a schematic diagram of the LED structure arrangement in the backlight provided in the embodiment of this application.

[0051] Reference numerals: 1, LED structure; 10, light-emitting component; 20, reflective structure layer; 11, back reflective layer; 12, light-emitting layer; 13, substrate; 201, sub-reflective structure; 202, spacing region; 2011, optical thin film layer; 21, first sub-reflective structure; 22, second sub-reflective structure. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features thus defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] Referring to Figure 1, this embodiment provides an LED structure including a light-emitting component 10 and a reflective structure layer 20 stacked together. The light-emitting component 10 includes a back reflective layer 11, a light-emitting layer 12, and a substrate 13 stacked together. The direction of the light-emitting component 10 toward the reflective structure layer 20 is the light-emitting direction of the LED structure. The reflective structure layer 20 is stacked closer to the substrate 13. In this embodiment, the light emitted from the light-emitting layer 12 is at least partially reflected to the back reflective layer 11 by the reflective structure layer 20, and then reflected again by the back reflective layer 11 before being emitted, which helps to increase the light divergence angle of the LED structure.

[0055] Please refer to Figure 2. The reflective structure layer 20 includes multiple sub-reflective structures 201, which are evenly distributed on the light-emitting component 10, with gaps 202 between adjacent sub-reflective structures 201. In this embodiment, the gaps 202 are areas without sub-reflective structures 201. Therefore, the reflective areas need to reflect light at least partially relative to the gaps 202, resulting in relatively dimmer light in the reflective areas and relatively brighter light in the gaps 202. In this embodiment, the multiple sub-reflective structures 201 are evenly distributed on the light-emitting component 10, alternating with the gaps 202. Compared to setting the same reflective structure on the entire light-emitting component 10, this allows the brighter areas and dimmer areas of the LED structure to complement each other. Thus, while ensuring that the LED structure can increase its divergence angle, it also avoids shadows appearing above the center of the LED structure compared to its surroundings, thereby improving the visual uniformity of the entire LED structure.

[0056] Meanwhile, in this embodiment, multiple sub-reflective structures 201 are uniformly arranged on the light-emitting component 10, which improves the uniformity of visual effect and eliminates the need for silicone or lenses. This saves on the cost of using silicone or lenses. On the other hand, reducing the use of additional silicone or lenses can prevent the absorption or reflection of light energy of the light-emitting component 10 by the silicone or lenses themselves, thereby reducing light energy loss, improving light utilization, and reducing power consumption. This can also achieve the purpose of improving light efficiency and visual effect.

[0057] In some embodiments, each sub-reflective structure 201 has the same shape. As shown in FIG2, in this embodiment, each sub-reflective structure 201 is rectangular, and each sub-reflective structure 201 has the same shape and size. The corresponding projected area of ​​each sub-reflective structure 201 on the light-emitting component 10 is the same. Correspondingly, each sub-reflective structure 201 is evenly distributed, and the spacing region 202 between the sub-reflective structures 201 is also rectangular. At this time, the spacing region 202 and the reflection region have the same shape and size, forming structural complementarity, thereby forming complementary light patterns and improving the uniformity of the light emission effect of the LED structure.

[0058] In some embodiments, the shape of the sub-reflective structure 201 may also be different. As shown in FIG3, the sub-reflective structure 201 located at the center of the light-emitting component 10 is rectangular, and a U-shaped sub-reflective structure 201 is arranged around the limited periphery. This also enables the alternating arrangement between the reflective area and the spacing area 202, so as to improve the uniformity of the light emission effect of the LED structure.

[0059] In some embodiments, the sub-reflection structures 201 have the same shape but different sizes. As shown in FIG. 4, 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 spacing regions 202, so as to improve the uniformity of the light-emitting visual effect of the LED structure.

[0060] In some embodiments, both the reflection regions formed by each sub-reflection structure 201 and the spacing regions 202 are rectangular. As shown in FIG. 5, the spacing 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 spacing 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.

[0061] In some embodiments, multiple sub-reflection structures 201 form a rotationally symmetric figure shape. As shown in FIG. 6, after rotating a certain angle around the center point of the reflection structure layer 20, the multiple sub-reflection structures 201 can coincide with themselves. The side of the light-emitting component 10 facing the light-emitting direction can be equally divided into several regions along the center point, such as dividing into 4 regions, 6 regions, etc. If divided into 4 regions, two of the regions are provided with sub-reflection structures 201; if divided into 6 regions, three of the regions are provided with sub-reflection structures 201, and the sub-reflection structures 201 are spaced apart 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.

[0062] In some embodiments, multiple sub-reflection structures 201 can also form a centrally symmetric figure shape, so that the reflection regions and the spacing 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.

[0063] Please refer to FIGS. 7 and 8 together. In some embodiments, the sub-reflection structure 201 includes a plurality of stacked optical thin film layers 2011, and the refractive indices between adjacent two optical thin film layers 2011 are different. In this embodiment, by adjusting the thickness of each optical thin film layer 2011, the incident light rays at a small angle can have constructive interference, the transmittance increases, and all are transmitted; while the incident light rays at a large angle have destructive interference, the transmittance decreases, and all are reflected. Therefore, the incident light rays with a large divergence angle are reflected, so as to increase the light-emitting divergence angle of the LED structure.

[0064] In some embodiments, the sub-reflective structure 201 includes a plurality of alternatingly stacked first and second film layers, wherein the refractive indices of the first and second film layers are different. That is, in this embodiment, the sub-reflective structure 201 is provided with only two optical thin film layers 2011 made of two different materials, and the two different optical thin film layers 2011 are alternately stacked in multiple layers.

[0065] In some embodiments, the sub-reflective structure 201 includes a first film layer and a second film layer stacked together, wherein the refractive indices of the first film layer and the second film layer are different. That is, in this embodiment, the sub-reflective structure 201 is provided with only two optical thin film layers 2011 made of two different materials, and one layer of each of the two different optical thin film layers 2011 is provided.

[0066] In some embodiments, the sub-reflection structure 201 includes a distributed Bragg reflection structure.

[0067] In some embodiments, the sub-reflective structure 201 includes a microstructure layer, which comprises multiple microstructures. The microstructures can be cylindrical, prismatic, hemispherical, or pyramidal in shape. In this embodiment, the multiple microstructures can all have the same shape, such as all being cylindrical or all being prismatic. Multiple microstructures can have various combinations of different shapes; that is, some microstructures may be cylindrical while others are prismatic. This application does not specifically limit this. In this embodiment, the maximum center-to-center distance between the microstructures is less than the wavelength of the emitted light from the light-emitting component 10, and the dimensions of each corresponding microstructure are smaller than the wavelength of the emitted light from the light-emitting component 10, in order to achieve effective reflection of light.

[0068] In this embodiment, the reflective effect of the microstructure layer can be adjusted by changing the size of the microstructure, such as the height and thickness of the cylindrical microstructure, and the height and base side length of the pyramidal microstructure.

[0069] In some embodiments, multiple microstructures are arranged in an array, for example, in a rectangular array as shown in Figure 9, or in a concentric circular array as shown in Figure 10. Similarly, in this embodiment, multiple microstructures are arranged in an array, forming a certain arrangement period between them. When multiple microstructures are arranged in a rectangular array, the arrangement period corresponds to the center-to-center distance between the microstructures, as shown by p1 and p2 in Figure 9. When multiple microstructures are arranged in a concentric circular array, the arrangement period corresponds to the interval between the concentric circles, as shown by p3 and p4 in Figure 10. This arrangement period is less than the wavelength of the light emitted by the light-emitting component 10; that is, p1 and p2 are the same and less than the wavelength of the light emitted by the light-emitting component 10, or p3 and p4 are the same and less than the wavelength of the light emitted by the light-emitting component 10, in order to achieve effective reflection of light.

[0070] Referring to Figure 11, this embodiment of the application also provides an LED structure, which includes a stacked light-emitting component and a reflective structure layer. The reflective structure layer includes multiple first sub-reflective structures 21 and multiple second sub-reflective structures 22, which are alternately arranged on the light-emitting component. Correspondingly, the light-emitting component includes a stacked back reflective layer, a light-emitting layer, and a substrate. The direction of the light-emitting component toward 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, the light emitted from the light-emitting layer is at least partially reflected to the back reflective layer by the reflective structure layer, and then reflected again by the back reflective layer before being emitted, which helps to increase the light-emitting divergence angle of the LED structure.

[0071] In this design, 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. Therefore, the brightness of the area corresponding to the first sub-reflective structure 21 is relatively dimmer than the brightness of the area corresponding to the second sub-reflective structure 22. In this case, the first and second sub-reflective areas are arranged alternately in a complementary manner, resulting in complementary brightness patterns. Compared to setting identical reflective structures throughout the entire light-emitting component, this allows the brighter areas and dimmer areas of the LED structure to complement each other. Thus, while ensuring that the LED structure can increase its divergence angle, it also avoids shadows appearing above the center of the LED structure compared to its surroundings, thereby improving the visual uniformity of the entire LED structure.

[0072] Meanwhile, in this embodiment, the first sub-reflection structure 21 and the second sub-reflection structure 22 are alternately arranged on the light-emitting component to improve the uniformity of visual effect. The setting of silicone or lens can be omitted, thereby saving the cost of using silicone or lens. On the other hand, reducing the use of additional silicone or lens can avoid the absorption or reflection of light energy of the light-emitting component by the silicone or lens itself, thereby reducing light energy loss, improving light utilization, and reducing power consumption. This can also achieve the purpose of improving light efficiency and visual effect.

[0073] It should be noted that the arrangement of the first sub-reflective structure 21 and the second sub-reflective structure 22 in the light-emitting component in this embodiment is the same as the arrangement of the sub-reflective structures, i.e., the reflection area and the interval area, as described above. Therefore, the arrangement of the first sub-reflective structure 21 and the second sub-reflective structure 22 will not be described again here.

[0074] In some embodiments, both the first sub-reflective structure 21 and the second sub-reflective structure 22 include multiple stacked optical thin film layers, and the refractive indices of adjacent optical thin film layers are different; wherein, in the stacking direction, the thickness of the first sub-reflective structure 21 is different from the thickness of the second sub-reflective structure 22. In this embodiment, the light transmittance of the two reflective structures can be adjusted by adjusting the thickness of the first reflective structure and the thickness of the second sub-reflective structure 22, so as to achieve the complementarity of the brightness and darkness of the light pattern in the LED structure, thereby improving the uniformity of the visual effect.

[0075] In some embodiments, both the first sub-reflective structure 21 and the second sub-reflective structure 22 include multiple alternating layers of first and second films, with different refractive indices for the first and second films. Furthermore, the thicknesses of the first and second sub-reflective structures 21 and 22 are different in the stacking direction. That is, in this embodiment, both the first and second sub-reflective structures 21 and 22 can be provided with only two different optical thin film layers, which are alternately stacked in multiple layers.

[0076] In some embodiments, both the first sub-reflective structure 21 and the second sub-reflective structure 22 include distributed Bragg reflective structures; wherein, in the stacking direction, the thickness of the first sub-reflective structure 21 is different from the thickness of the second sub-reflective structure 22. In this embodiment, the light transmittance of the two reflective structures, i.e., the reflection effect of the two reflective structures, can be adjusted by adjusting the thickness of the first reflective structure and the thickness of the second sub-reflective structure 22, so as to achieve the complementarity of light pattern brightness and darkness in the LED structure, thereby improving the uniformity of visual effect.

[0077] In other embodiments, the first sub-reflective structure 21 or the second sub-reflective structure 22 may both be microstructure layers, each comprising multiple microstructures. The structure of this microstructure layer can be the same as the structure of the sub-reflective structure described above when a microstructure layer is included. Therefore, the specific structure of the first sub-reflective structure 21 or the second sub-reflective structure 22 including a microstructure layer will not be elaborated upon. In this embodiment, the different reflection effects of the first sub-reflective structure 21 and the second sub-reflective structure 22 can be adjusted by regulating the size or shape of the microstructures in the microstructure layer, thereby achieving different light transmittances and ensuring complementary brightness patterns.

[0078] This application also provides an LED lamp bead, which includes the LED structure described above. Since the LED structure has been described in detail above, it will not be repeated here.

[0079] This application also provides a backlight source, which includes a substrate on which a plurality of the above-described LED structures are disposed. Since the LED structure has been described in detail above, it will not be repeated here.

[0080] In some embodiments, as shown in FIG12, multiple LED structures 1 in the backlight are arranged in a preset direction, and the reflective structure layers in each LED structure 1 are identical. For example, in the same backlight, the reflective structure layer of each LED structure 1 includes multiple sub-reflective structures, or the reflective layer of each LED structure 1 includes multiple first sub-reflective structures or second sub-reflective structures. When the reflective structure layer of the LED structure 1 in the backlight includes multiple sub-reflective structures, the arrangement of the multiple sub-reflective structures in each corresponding LED structure 1 can also be the same; when the reflective structure layer of the LED structure 1 in the backlight includes multiple first sub-reflective structures and multiple second sub-reflective structures, the arrangement of the first sub-reflective structures and second sub-reflective structures in each corresponding LED structure 1 can also be the same. Thus, it is ensured that the overall reflective area and the interval area of ​​the backlight, or the first sub-reflective structures and the second sub-reflective structures, are complementary, so as to achieve the complementarity of the overall light pattern brightness and darkness, thereby improving the uniformity of the backlight visual effect.

[0081] As one embodiment, any LED structure can overlap with other LED structures after translation. That is, in this embodiment, each LED structure can be the same size. When the arrangement of the reflection area and the spacing area in each LED structure is the same, or when the layout of the first sub-reflection structure and the second sub-reflection structure in each LED structure is the same, it can be ensured that the LED structures can form a complementary structure in the reflection area and the spacing area, so as to form a complementary overall light pattern brightness and darkness, thereby improving the uniformity of the backlight visual effect.

[0082] This application embodiment also provides a backlight source, which includes a plurality of the above-described LED beads, each LED bead having a corresponding LED structure. Since the LED structure has been described in detail above, it will not be repeated here.

[0083] In this backlight, each LED can have the same structure, and the corresponding reflective structure within each LED structure can also be identical. If the reflective layer of the LED structure in the backlight includes multiple sub-reflective structures, then the arrangement of these sub-reflective structures within each corresponding LED structure can also be the same. Similarly, if the reflective layer of the LED structure in the backlight includes multiple first sub-reflective structures and multiple second sub-reflective structures, then the arrangement of these first and second sub-reflective structures within each corresponding LED structure can also be the same. This ensures that the overall reflective area and spacing area of ​​the backlight, or the first and second sub-reflective structures, are complementary, thereby achieving complementary brightness and darkness in the overall light pattern and improving the uniformity of the backlight's visual effect.

[0084] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0085] The LED structure provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

An LED structure, wherein, The LED structure includes a stacked light-emitting component and a reflective structure layer; The reflective structure layer includes multiple sub-reflective structures, which are uniformly distributed on the light-emitting component, and an interval region is formed between adjacent sub-reflective structures. According to the LED structure of claim 1, wherein, The multiple sub-reflection structures are in a rotationally symmetric shape. According to the LED structure of claim 1, wherein, The multiple sub-reflection structures are in a centrally symmetrical shape. According to the LED structure of claim 1, wherein, The sub-reflection structure includes multiple stacked optical thin film layers, and the refractive indices of adjacent optical thin film layers are different. According to the LED structure of claim 1, wherein, The sub-reflective structure includes multiple alternating layers of first and second films, wherein the refractive indices of the first and second films are different. According to the LED structure of claim 1, wherein, The sub-reflective structure includes a first film layer and a second film layer stacked together, wherein the refractive indices of the first film layer and the second film layer are different. According to the LED structure of claim 1, wherein, The sub-reflection structure includes a distributed Bragg reflection structure. According to the LED structure of claim 1, wherein, The sub-reflective structure includes a microstructure layer, which comprises multiple microstructures. According to the LED structure of claim 8, wherein, Multiple of the microstructures are arranged in an array. According to the LED structure of claim 8, wherein, The microstructure is cylindrical, prismatic, hemispherical, or pyramidal in shape. An LED structure, wherein, The LED structure includes a stacked light-emitting component and a reflective structure layer; the reflective structure layer includes a plurality of first sub-reflective structures and a plurality of second sub-reflective structures, the first sub-reflective structures and the second sub-reflective structures being alternately arranged on the light-emitting component; The light transmittance of the first sub-reflective structure is different from that of the second sub-reflective structure. According to the LED structure of claim 11, wherein, Both the first sub-reflective structure and the second sub-reflective structure include multiple stacked optical thin film layers, and the refractive indices of adjacent optical thin film layers are different; wherein, in the stacking direction, the thickness of the first sub-reflective structure is different from the thickness of the second sub-reflective structure. According to the LED structure of claim 11, wherein, Both the first sub-reflective structure and the second sub-reflective structure include multiple alternating layers of first and second films, the refractive indices of the first and second films being different; and the thicknesses of the first and second sub-reflective structures being different in the stacking direction. According to the LED structure of claim 11, wherein, Both the first sub-reflective structure and the second sub-reflective structure include a distributed Bragg reflective structure; wherein, in the stacking direction, the thickness of the first sub-reflective structure is different from the thickness of the second sub-reflective structure. One type of LED light bead, wherein, The LED bead includes an LED structure; the LED structure includes a stacked light-emitting component and a reflective structure layer. The reflective structure layer includes multiple sub-reflective structures, which are uniformly distributed on the light-emitting component, and an interval region is formed between adjacent sub-reflective structures. One type of LED light bead, wherein, The LED bead includes an LED structure; the LED structure includes a stacked light-emitting component and a reflective structure layer. The reflective structure layer includes a plurality of first sub-reflective structures and a plurality of second sub-reflective structures, the first sub-reflective structures and the second sub-reflective structures being alternately arranged on the light-emitting component; The light transmittance of the first sub-reflective structure is different from that of the second sub-reflective structure. A backlight, wherein, The backlight includes a substrate on which multiple LED structures are disposed; The LED structure includes a stacked light-emitting component and a reflective structure layer; The reflective structure layer includes multiple sub-reflective structures, which are uniformly distributed on the light-emitting component, and an interval region is formed between adjacent sub-reflective structures. A backlight, wherein, The backlight includes a substrate on which multiple LED structures are disposed; The LED structure includes a stacked light-emitting component and a reflective structure layer; The reflective structure layer includes a plurality of first sub-reflective structures and a plurality of second sub-reflective structures, the first sub-reflective structures and the second sub-reflective structures being alternately arranged on the light-emitting component; The light transmittance of the first sub-reflective structure is different from that of the second sub-reflective structure. According to claim 18, the backlight source, wherein, The plurality of LED structures are arranged in a preset direction, and the reflective structure layer in each of the LED structures is the same. A backlight, wherein, The backlight source includes multiple LED beads, each LED bead comprising an LED structure; the LED structure includes stacked light-emitting components and a reflective structure layer; The reflective structure layer includes multiple sub-reflective structures, which are uniformly distributed on the light-emitting component, and an interval region is formed between adjacent sub-reflective structures.

Images