LED light-emitting device, LED light-emitting system and LED lamp for remote illumination

Abstract

The utility model provides an LED light-emitting device, an LED light-emitting system and a remote lighting LED lamp. The LED light-emitting device comprises: an LED array light source comprising a plurality of light-emitting chips; the light collecting device array comprises a plurality of light collecting devices, the light collecting devices correspond to the light-emitting chips, and the light collecting devices are used for collecting light emitted by the corresponding light-emitting chips and enabling the light to be emitted out through light outlets of the light collecting devices; the radius of the inscribed circle of the light outlet of the light collecting device is smaller than or equal to five times of the radius of the inscribed circle of the light-emitting face of the corresponding light-emitting chip. The conduction lens is opposite to the light outlets of the plurality of light collecting devices, and the conduction lens deflects emergent light from the light outlets of the light collecting devices. The overall size of the light-emitting device can be reduced.

Description

Technical Field

[0001] This application relates to the field of lighting, and more particularly to LED lighting devices, LED lighting systems and LED luminaires for long-distance lighting. Background Technology

[0002] In the field of long-range lighting, such as searchlights, ship lights, and stage lights, the goal is to achieve long-range, uniform, and luminous effects. Taking stage lighting as an example, stage lighting is an indispensable part of live performances such as dramas, concerts, dances, and performances. Stage lights are used to provide diverse, colorful, and dynamic lighting presentations, and different stage lighting designs can be made according to the artistic effects of the live performance and the site conditions.

[0003] Specifically, the principle behind achieving stage lighting effects in a stage lighting scenario is to use a light source device to form a light spot. Based on the formed light spot, the stage lighting can be further displayed. For example, some cutout shapes, such as circles or stars, can be placed near the light spot according to the stage lighting requirements. When the cutout shape is illuminated by the light spot, a projection lens is used to project the shape to a distance, thus forming the stage lighting effect. In other words, the display effect of stage lighting is usually affected by the quality of the light spot.

[0004] In the field of stage lighting, using array light sources to form a converged light spot is a relatively mature approach, as illustrated in patent documents with publication numbers CN103968268 and CN209101217. As an example, Figure 1 Figure 3 is a schematic diagram of the structure of a light-emitting device in the related technology. Specifically, Figure 3 is Figure 3 from the patent document CN209101217. This paper uses Figure 3 from that document as an example to illustrate the scheme of the light-emitting device in the related technology. As shown in Figure 3, a conventional light-emitting device includes an LED (Light Emitting Diode) array, a collimating lens array, a compound eye lens group, and a converging lens, thereby forming a converging light spot. Specifically, above the LED array are collimating lens arrays 11 and 12. The light emitted by the LED array is collected and collimated by the collimating lens arrays 11 and 12 to form collimated light. This collimated light is then converged by the converging lens 4 to form a light spot at the focal point of the converging lens 4.

[0005] In this scheme, the optical system needs to collimate and then converge the light emitted by the LED. This collimation process requires a relatively large lens aperture, resulting in a large overall size and high cost for the light-emitting device. In other words, related technologies require collimating the light emitted from the array light source. According to the principle of optical expansion conservation, with a fixed light source, the more collimated the light, the larger the aperture of the collimating lens needs to be. Therefore, each sub-lens in the collimating lens array 12 shown in Figure 3 needs a relatively large aperture, typically 8-10 times the size of the light source (i.e., the light-emitting chip in the LED array). If the total power requirement is higher, and the LED array light source requires more light-emitting chips, the size of the collimating lens array will increase even more rapidly due to the magnification effect, resulting in a large overall size for the light-emitting device. Utility Model Content

[0006] This application provides LED light-emitting devices, LED light-emitting systems, and LED luminaires for remote lighting, in order to solve the problem that the collimation process requires a relatively large lens aperture, which results in a relatively large overall size of the light-emitting device.

[0007] This application provides a light-emitting device, including:

[0008] LED array light source, comprising multiple light-emitting chips;

[0009] An array of light collection devices includes multiple light collection devices, each light collection device corresponding to each light-emitting chip. The light collection device is used to collect the light emitted by the corresponding light-emitting chip and make the light exit through the light outlet of the light collection device.

[0010] The radius of the inscribed circle of the light-emitting port of the light-collecting device is R, and the radius of the inscribed circle of the light-emitting surface of the corresponding light-emitting chip is r. The light-collecting device and the light-emitting chip are configured such that R≤5r. A conductive lens is used, which is opposite to the light-emitting ports of the multiple light-collecting devices. The conductive lens deflects the emitted light from the light-emitting ports of the light-collecting devices.

[0011] The light-emitting device includes an LED array light source, which includes multiple light-emitting chips. The light-emitting device may also include a light-collecting device array, which includes multiple light-collecting devices. The light-collecting devices are arranged correspondingly to the light-emitting chips. The light-collecting devices are used to collect the light emitted by the corresponding light-emitting chips and enable the light from the corresponding light-emitting chips to be emitted through the light outlet of the light-collecting device.

[0012] The radius of the inscribed circle of the light-emitting port of the light-collecting device is R, and the radius of the inscribed circle of the light-emitting surface of the corresponding light-emitting chip (taking square or circular as an example) is r. The configuration of the light-collecting device and the light-emitting chip is: R≤5r can reduce the overall volume of the light-emitting device, but at the same time, it will make most of the light emitted from the light-collecting device array divergent, of which collimated light accounts for only a small part.

[0013] By incorporating a guiding lens, which receives light emitted from the light-collecting array, the guiding lens directs the light emitted from the array, allowing upward-biased beams from the light source to form an upper focal point, located above the focal point of the guiding lens. Simultaneously, downward-biased beams from the light source form a lower focal point. Therefore, all light emitted from the light-collecting array, after passing through the guiding lens, forms a relatively large spot on the focal plane of the guiding lens; the boundaries of this spot are the upper and lower focal points.

[0014] It should be noted that although a transmission lens can still focus parallel collimated light at the focal point, only a small portion of the light emitted from the light collecting array toward the transmission lens is parallel collimated light. Most of the light is still divergent. Therefore, the cross-sectional area of ​​the beam passing through the transmission lens does not significantly decrease to form a focal point. Thus, a transmission lens cannot be simply defined as a focusing lens.

[0015] Therefore, the light-emitting device in the embodiments of this application, by using a matching LED array light source, a light collection device array, and a transmission lens, eliminates the need for a collimating lens that matches the LED array light source, thereby reducing the overall size of the light-emitting device and also reducing the overall cost of the light-emitting device.

[0016] This application provides an LED light-emitting system, including the light-emitting device described in any of the above claims, and an angle-adjusting lens, which receives light emitted from the transmission lens.

[0017] This application provides an LED lighting fixture for remote lighting, including the LED light-emitting system described in any of the above claims, and a patterned aperture located near the angle-adjusting lens, the patterned aperture including a light-transmitting area with a pattern;

[0018] The LED luminaire for remote lighting also includes a projection lens, which is used to project the pattern of the light-transmitting area of ​​the pattern aperture to the far field; the distance between the pattern aperture and the vertex of the light-emitting surface of the angle-adjusting lens is less than half the focal length of the transmission lens. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] Figure 1 This is a schematic diagram of the structure of a traditional stage lighting source;

[0021] Figure 2 This is a schematic diagram of the structure of a light collection device provided in an embodiment of this application;

[0022] Figure 3a This is a schematic diagram of the structure of an LED light-emitting system provided in an embodiment of this application;

[0023] Figure 3b This is a schematic diagram of another LED light-emitting system provided in an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of another LED light-emitting system provided in the embodiments of this application;

[0025] Figure 5 This is a schematic diagram of another LED light-emitting system provided in the embodiments of this application;

[0026] Figure 6 A comparative schematic diagram of the light-emitting device provided in the embodiments of this application and a traditional stage lighting source;

[0027] Figure 7 This is a schematic diagram of another LED light-emitting system provided in the embodiments of this application;

[0028] Figure 8 This is a schematic diagram of the structure of the light-emitting device provided in the embodiments of this application;

[0029] Figure 9 This is a schematic diagram of the structure of another light-emitting device provided in the embodiments of this application;

[0030] Figure 10a This is a schematic diagram of another LED light-emitting system provided in the embodiments of this application;

[0031] Figure 10b This is a schematic diagram of another LED light-emitting system provided in the embodiments of this application;

[0032] Figure 11 This is a schematic diagram of another LED light-emitting system provided in the embodiments of this application;

[0033] Figure 12a This is a schematic diagram of the structure of a light-emitting chip provided in an embodiment of this application;

[0034] Figure 12bThis is a schematic diagram of the structure of an LED array light source provided in an embodiment of this application;

[0035] Figure 13 This is a schematic diagram of the structure of an LED light-emitting system provided in an embodiment of this application;

[0036] Figure 14 This application provides a schematic diagram of the structure of an LED luminaire for remote lighting.

[0037] Figure 15a This diagram illustrates the optical structure of the LED unit in Embodiment Seven of this utility model.

[0038] Figure 15b and Figure 15c They respectively represent Figure 15a The three-dimensional and top views of the LED unit are shown.

[0039] Figure 16 This is a perspective view of the LED unit array according to Embodiment Seven of the present invention;

[0040] Figure 17 This is a perspective view of the light-emitting device according to Embodiment Seven of the present invention;

[0041] Figure 18a It indicates Figure 17 The diagram shows the optical structure of an LED luminaire used for long-distance lighting.

[0042] Figure 18b It indicates Figure 18a A side view of the light-emitting device in the -Z direction in the illustrated embodiment;

[0043] Figure 18c It indicates Figure 18a A schematic diagram illustrating the working principle of the reflective aperture of the light-emitting device in the embodiment;

[0044] Figure 19a This shows a partially magnified view of the reflector tip in another embodiment;

[0045] Figure 19b This indicates that it has been applied. Figure 19a A schematic diagram of the structure of the light-emitting device with a reflective tip;

[0046] Figure 20a and Figure 20b The figures show three-dimensional views of a hexagonal LED unit and its LED unit array in another embodiment.

[0047] Figure 21 This diagram illustrates the structure of a linear LED array in another embodiment;

[0048] Figure 22 This diagram illustrates the optical structure of an LED luminaire based on an LED linear array for use in long-distance lighting.

[0049] Figure 23 This diagram illustrates a far-field light spot in another embodiment;

[0050] Figure 24a This diagram illustrates the structure of a light-emitting device in another embodiment;

[0051] Figure 24b Explained Figure 24a The working principle and optical schematic diagram of the converging lens in the embodiment;

[0052] Figure 25a A schematic diagram illustrating the optical structure of an LED luminaire for remote lighting in another embodiment;

[0053] Figure 25b It indicates Figure 25a A side view of the light-emitting device in the embodiment in the -Z direction;

[0054] Figure 26 This is a schematic diagram of the structure of a light-emitting device provided in an embodiment of this application.

[0055] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0056] As described in the background section, traditional light-emitting devices include an LED array light source, a collimating lens array, a compound eye lens group, and a converging lens, thereby forming a converged light spot. In related technologies, since the light emitted from the LED array light source needs to be collimated first, according to the principle of conservation of optical spread, given a fixed light source, the more collimated the light, the larger the aperture of the collimating lens is required. Therefore, in related technologies… Figure 1 The aperture of each sub-lens in the collimating lens array 12 shown is relatively large, for example, reaching 8-10 times the light-emitting size of the light source (i.e., the light-emitting chip in the LED array light source).

[0057] Assuming the LED array light source has its light-emitting chips arranged in a circular array, with 10 chips (1mm in diameter) placed along the diameter of the array, and considering that the size of the collimating lens array needs to be 8-10 times larger than the size of the LED array light source, then the diameter of the collimating lens array would be 80-100mm. If the total power requirement is higher, and the LED array light source requires more light-emitting chips, then due to the magnification effect of the collimating lens array, its size will increase even more rapidly. Furthermore, to improve light uniformity, related technologies typically require a thicker compound eye lens group 3 on the light-emitting side of the collimating lens array, making traditional light-emitting devices larger and heavier.

[0058] To address the aforementioned issues, in some possible implementations of this solution, a smaller light-collecting device is used to collect the light emitted by the light-emitting chip, as illustrated in the diagram below. Figure 2 As shown, the radius of the inscribed circle of the light-emitting surface of the light-emitting chip 201a is r, and the radius of the inscribed circle of the light-emitting port of the light-collecting device 202a is R. Unlike traditional light-emitting devices, R in this design is not significantly larger than r. Through this design, the light-collecting device 202a can collect the light emitted by the light-emitting chip 201a, and the light 221 emitted from the light-collecting device 202a will have a certain angle of exit (this also includes a small portion of collimated light, such as ray 221a). This design achieves the required divergence angle of the beam 221 by rationally designing the R / r ratio.

[0059] To achieve the stage lighting effect, you can Figure 2 The light-emitting chips and light-collecting devices shown are arranged in an array to form an LED array light source 301 and a light-collecting device array 302, respectively. A lens 303 is then placed at the rear end of the optical path of the light-collecting device array 302. Figure 3a As shown, the lens 303 can converge incident parallel light to form a focal point. Then, the collimated portion 321 of the light emitted from the light collecting device array 302 converges to the focal point 322 after passing through the lens 303.

[0060] However, unlike the working principle of traditional light-emitting devices, this design is based on forming a light spot from light emitted at a certain angle from a light-collecting array. Therefore, compared to how the collimated light 321 emitted from the light-collecting array 302 (which accounts for a very small portion of the total emitted light) forms a light spot, this design essentially considers the transmission method of large-angle light emitted from the light-collecting array 302 through the lens 303. Regarding this, as... Figure 3bAs shown, in this scheme, the upward-biased high-angle beam 323 forms an upper focal point 326 after passing through lens 303, which is located above focal point 322; simultaneously, the downward-biased high-angle beam 324 forms a lower focal point 327 after passing through lens 303, which is located below focal point 322. Therefore, based on this scheme, all light emitted from the light-collecting array 302, after passing through lens 303, will form a relatively large light spot on the focal plane of lens 303, the boundary of which is the upper focal point 326 and the lower focal point 327. Obviously, the larger the angle of the light emitted from the light-collecting array 302, the larger the diameter of the light spot 325 formed on the focal plane of lens 303.

[0061] In summary, this solution overcomes the traditional approach of forming light spots based on collimated light (light that is as collimated as possible with collimation as the structural design goal). Instead, it takes a different approach by increasing the angle of the light emitted from the light-collecting array by designing the R / r ratio, while keeping the size of the light-emitting chip r constant. This further increases the size of the light spot 325 formed on the focal plane of lens 303. Therefore, this solution eliminates the need for a large collimating lens, resulting in a significant reduction in system size while simultaneously increasing the size of the light spot 325. It should be noted that in this solution, lens 303 differs from the converging lens in traditional light-emitting devices; instead, it serves as a beam guide (because the cross-sectional area of ​​the beam is not significantly reduced during the focal point formation process).

[0062] This application provides an LED light-emitting device, an LED light-emitting system, and an LED luminaire for remote lighting. The LED light-emitting device includes an LED array light source 401, which comprises multiple light-emitting chips. The light-emitting device may also include a light-collecting device array 402, which includes multiple light-collecting devices. Each light-collecting device is correspondingly disposed to each light-emitting chip. The light-collecting device collects the light emitted by the corresponding light-emitting chip and allows the light from the corresponding light-emitting chip to exit through the light-emitting port of the light-collecting device.

[0063] By incorporating a guiding lens, which receives light emitted from the light-collecting array 402, the guiding lens can conduct the light emitted from the light-collecting array 402. This allows large-angle upward-biased beams from the light-collecting array 402 to form an upper focal point after passing through the guiding lens, which is located above the focal point of the guiding lens. Simultaneously, large-angle downward-biased beams from the light-collecting array 402 can form a lower focal point after passing through the guiding lens. Therefore, all the light emitted from the light-collecting array 302, after passing through the guiding lens, will form a relatively large light spot on the focal plane of the guiding lens. The boundaries of this light spot are the upper focal point 326 and the lower focal point 327.

[0064] Therefore, the LED light-emitting device in this embodiment, through the use of a matching LED array light source, a light-collecting device array, and a transmission lens, eliminates the need for a large-volume collimating lens to match the LED array light source, thereby reducing the overall size and cost of the light-emitting device. Furthermore, since the diffused light emitted from the light-collecting device array in this solution is inherently more uniform, there is no need for light-uniforming components such as compound eye lenses, thus reducing light loss during light transmission and achieving better spot brightness. In addition, in stage lighting scenarios, the light-emitting device typically needs to oscillate under the drive of a driving device to adjust its orientation; for example, follow lights commonly found in stage lighting require the light to move on-site. It is understood that because the light-emitting device provided by this solution is smaller and lighter, its oscillation process is more flexible and its oscillation amplitude is larger when subjected to the same torque from the driving device, resulting in better performance.

[0065] The technical solution of this application and how it solves the above-mentioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0066] To address the issue of excessive size, this embodiment uses a smaller light-collecting device to collect the light emitted by the array light source, as shown in the schematic diagram below. Figure 2 As shown.

[0067] Figure 2 This is a schematic diagram of the structure of an LED light-emitting device provided in an embodiment of this application. The radius of the inscribed circle of the light-emitting surface of the light-emitting chip 201a is r, and the radius of the inscribed circle of the light-emitting port of the light-collecting device 202a is R.

[0068] In this embodiment, the design R is not much greater than r, meaning the light-collecting device 202a can effectively collect the light emitted by the light-emitting chip 201a. The light 221 emitted from the light-collecting device 202a is non-collimated light, meaning it will be emitted at a certain angle. The term "non-collimated light" as used herein refers to a design where, unlike related technologies, the emitted light is not required to be collimated. Instead, this embodiment aims for the emitted light to have a certain divergence angle. However, this does not preclude the possibility that the light emitted from the light-collecting device 202a in this embodiment may include some light biased towards the collimation direction. For example, see [link to example]. Figure 2The light ray 221a in this embodiment is because the emission direction of a small portion of the light emitted by the light collection device may be exactly the same as the direction of the collimated light. However, it only accounts for a small portion of the light emitted by the light collection device 202a. This does not affect the definition of non-collimated light emitted by the light collection device in this embodiment. That is, the non-collimated light emitted by the light collection device mentioned herein refers to the light emitted by the light collection device designed to emit non-collimated light. In other words, the concept of this embodiment differs from the light-emitting devices in related technologies. The light-emitting devices in related technologies are all based on collimated light focusing to form a light spot, while this embodiment is based on non-collimated light conduction to form a light spot.

[0069] In practical applications, existing stage lighting requirements are often diverse. For example, there are diverse and dynamic display requirements regarding the shape and size of the light spots. Existing technologies require customized light-emitting devices for different lighting needs, resulting in high costs. However, the light-emitting device provided in this embodiment, because it processes non-collimated light, can adapt to various lighting requirements. In other words, the light-emitting device in this embodiment is similar to a standard part, providing an adaptability function. It can meet diverse stage lighting needs by adapting to the corresponding angle adjustment lens, without the need for separately customized light-emitting devices, thus effectively reducing costs.

[0070] In one example, Figure 2 The light-emitting chips and light-collecting devices shown are arranged in an array to form an LED array light source 301 and a light-collecting device array 302, respectively. A transmission lens 303 is then placed at the rear end of the optical path of the light-collecting device array 302, i.e. Figure 3a As shown, Figure 3a This is a schematic diagram of the structure of a light-emitting device provided in an embodiment of this application. Figure 3a In this configuration, the guiding lens 303 can converge incident parallel light to form a focal point. Therefore, a small portion 321 of the collimated light emitted from the light collecting array 302 converges at the focal point 322 after passing through the guiding lens 303. It should be noted that... Figure 3a The diagram shows the transmission lens 303 processing a small portion of parallel light rays in the light emitted from the light collection device 202a whose direction is consistent with the collimation direction. However, as mentioned earlier, the core of this solution lies in forming a light spot based on the non-collimated light emitted by the light collection device. This is the design goal of the LED light-emitting device in this embodiment, which is different from the light-emitting devices in related technologies. That is, it does not pursue the collimated light emitted by the light collection device array 302. On the contrary, due to the reduced size of R, the light collection device array 302 in this solution is mainly used to emit non-collimated light.

[0071] Combination Figure 3bFurther explanation is given regarding the principle of non-collimated light forming a light spot in the light collection device array 302. For example... Figure 3b As shown, Figure 3b This is a schematic diagram of another light-emitting system provided in an embodiment of this application. Specifically, Figure 3b This diagram illustrates how the guiding lens 303 processes light emitted from the light collecting device 202a at a specific angle. In the diagram, the upward-biased high-angle beam 323, after passing through the guiding lens 303, forms an upper focal point 326, which is located above the focal point 322. Simultaneously, the downward-biased high-angle beam 324, after passing through the guiding lens 303, forms a lower focal point 327, which is located below the focal point 322. Therefore, all the light emitted from the light collecting device array 302, after passing through the guiding lens 303, forms a relatively large spot on the focal plane of the guiding lens 303. The boundaries of this spot are the upper focal point 326 and the lower focal point 327. Clearly, the larger the angle of the light emitted from the light collecting device array 302, the larger the diameter of the spot 325 formed on the focal plane of the guiding lens 303.

[0072] In this embodiment, with the size r of the light-emitting chip remaining constant, the size of R decreases, which correspondingly decreases the R / r ratio. This increases the angle of the light emitted from the light-collecting array and further increases the size of the light spot 325 formed on the focal plane of the lens 303. Therefore, when the system volume is significantly reduced, the size of the light spot 325 increases significantly. In this case, it can be said that the function of the guiding lens 303 in this system differs from that of the converging lens in related technologies; instead, it serves to guide the light beam because the cross-sectional area of ​​the beam does not significantly decrease during the focal point formation process.

[0073] Specifically, this embodiment proposes an LED light-emitting device, and a schematic diagram of one example is shown below. Figure 4 As shown, the light-emitting device includes an LED array light source 401, which includes multiple light-emitting chips. The device also includes a light-collecting device array 402, which includes multiple light-collecting devices, each corresponding to a light-emitting chip. Each light-collecting device collects light emitted from its corresponding chip and emits the light through its exit port. The radius of the inscribed circle of the exit port of the light-collecting device is R, and the radius of the inscribed circle of the corresponding light-emitting chip's light-emitting surface is r, where R ≤ 5r. As described above, R ≤ 5r reduces the system's volume, ensuring that most of the light emitted from the light-collecting device array is non-collimated light, i.e., divergent light. Under the guidance of the guiding lens 403, this forms a light spot 425, which is the technical solution described in this embodiment based on non-collimated light transmission to form a light spot.

[0074] In one example, 1.5r ≤ R. Specifically, 1.5r ≤ R ensures that the light-emitting chips in the LED array are not too close together, and the appropriate spacing between the chips ensures heat dissipation and lifespan. In another example, the light-collecting device and the light-emitting chips can be configured such that 2.5r ≤ R ≤ 4r. Satisfying this relationship better balances heat dissipation of the chips and the size of the light-emitting device.

[0075] 3.6r≤R. Specifically, 3.6r≤R can further reduce the size of the system and ensure that most of the light emitted from the light collection array is non-collimated light, i.e., divergent light.

[0076] In one example, a circular light-emitting chip with a radius of r of 0.7 mm (approximately 12 watts at full power and 8 watts of heat generation) can be selected, and a light-collecting device with an output radius of R = 2.1 mm can be set up (i.e., R = 3r, where the divergence angle of the light-emitting chip's beam is approximately 39 degrees, where the divergence angle of the beam is equal to sin -1 (twice that of (r / R)).

[0077] At this point, the light collection device is not too small to be difficult to manufacture, and the center-to-center distance between adjacent light-emitting chips is 2R = 4.2 mm. This distance is sufficient to dissipate the heat of a single 8-watt chip, ensuring effective heat dissipation during the light-emitting process. In other words, within the value range provided in this embodiment, it is possible to form a light spot based on non-collimated light, thereby reducing the system size.

[0078] Based on this, a smaller R allows for a smaller system size, while a larger R allows for greater spacing between the light-emitting chips, resulting in better heat dissipation and higher efficiency. In practical applications, the design can be tailored to specific needs and requirements. For example, the ratio R of the inscribed circle of the light-collecting device's output port to the radius r of the inscribed circle of the corresponding light-emitting chip's emitting surface can be set within any range of 1.5-2, 2-2.5, 2.5-3, 3-3.5, 3.5-4, 4-4.5, and 4.5-5.

[0079] Furthermore, by providing a guiding lens, which receives light emitted from the light-collecting array 402, the guiding lens can conduct the light emitted from the light-collecting array 402, allowing upward-biased beams from the light-collecting array 402 to form an upper focal point after passing through the guiding lens. This upper focal point is located above the focal point of the guiding lens. Simultaneously, downward-biased beams from the light-collecting array 402 can form a lower focal point after passing through the guiding lens. Therefore, all the light emitted from the light-collecting array 302, after passing through the guiding lens, will form a relatively large light spot on the focal plane of the guiding lens. The boundaries of this light spot are the upper focal point 326 and the lower focal point 327.

[0080] It should be noted that although the guiding lens can still focus parallel collimated light at the focal point, only a small portion of the light emitted from the light-collecting array towards the guiding lens is in the collimating direction; most of the light remains divergent. Therefore, the cross-sectional area of ​​the beam passing through the guiding lens does not significantly decrease during the focal point formation process, and the guiding lens cannot be simply defined as a focusing lens. Thus, the light-emitting device in this embodiment, through the coordinated LED array light source, light-collecting array, and guiding lens, eliminates the need for a collimating lens coordinated with the LED array light source, thereby reducing the overall size and cost of the light-emitting device.

[0081] Specifically, refer to Figure 8 and Figure 9 The light-emitting device in this embodiment includes an LED array light source 1, which includes multiple light-emitting chips. The multiple light-emitting chips can be arranged in a circular array, and the multiple light-emitting chips can be used to emit light.

[0082] For example, considering the display needs of stage lights, the light-emitting chip may include at least one sub-chip. For instance, the number of sub-chips in the same light-emitting chip may be set to one, or the number of sub-chips may be set to multiple.

[0083] For example, the number of sub-chips can be set to three, which can include a red sub-chip, a green sub-chip, and a blue sub-chip. The red sub-chip emits red light, the green sub-chip emits green light, and the blue sub-chip emits blue light.

[0084] Each light-emitting chip may include a red sub-chip, a green sub-chip, and a blue sub-chip. The light-emitting chip can combine the red light from the red sub-chip, the green light from the green sub-chip, and the blue light from the blue sub-chip to form a combined light beam.

[0085] Alternatively, the number of sub-chips can be set to four, which can include a red sub-chip (R in the diagram), a green sub-chip (G in the diagram), a blue sub-chip (B in the diagram), and a white sub-chip (W in the diagram). Among them, the red sub-chip emits red light, the green sub-chip emits green light, the blue sub-chip emits blue light, and the white sub-chip emits white light.

[0086] It is easy to understand that by adjusting parameters such as the light emission timing and brightness of each sub-chip in the same light-emitting chip, the color of the combined light beam emitted by the light-emitting chip can be changed, thereby enabling the light-emitting chip to emit light of different colors, and thus improving the light emission effect of the light-emitting device.

[0087] In some possible implementations, the sub-chips in the same light-emitting chip may have the same or approximately the same orientation, so that the light-emitting directions of the sub-chips are the same or approximately the same.

[0088] For example, a light-emitting chip may have a light-emitting surface, which can be used to refer to the light-emitting area of ​​the light-emitting chip. The light-emitting surface of the light-emitting chip may be arranged perpendicular to the thickness direction of the light-emitting chip; for example, the light-emitting surface of the light-emitting chip may be set as a plane perpendicular to the thickness direction of the light-emitting chip.

[0089] The size of the light-emitting surface of a light-emitting chip can be determined based on the overall light-emitting area of ​​the chip. For example, when a light-emitting chip comprises multiple sub-chips, there may be gaps between these sub-chips, making the overall light-emitting area of ​​the chip typically larger than the sum of the light-emitting areas of the sub-chips. In this case, the size of the light-emitting surface of the chip needs to be determined based on the overall light-emitting area of ​​the chip.

[0090] The shape of the light-emitting surface of the light-emitting chip can be determined based on the arrangement of multiple sub-chips, or it can be determined based on the actual needs of the light-emitting device. For example, the shape of the light-emitting chip can be set to square or circular, etc.

[0091] For example, the number of sub-chips in the same light-emitting chip can be set to four. A light-emitting chip can include four sub-chips. The four sub-chips can be arranged in a grid pattern.

[0092] It is easy to understand that the light-emitting surface of a light-emitting chip refers to the light-emitting area enclosed by four sub-chips arranged in a grid pattern, and the light-emitting surface of the light-emitting chip is set as a square. In LED array light source 1, multiple light-emitting chips can be located in the same plane, and the plane containing the multiple light-emitting chips can be arranged parallel to the light-emitting surface of the light-emitting chip.

[0093] In this way, sub-chips of different colors can be controlled separately, thus achieving the emission of light spots of different colors. For example, a light-emitting chip can be composed of at least two sub-chips spliced ​​together, and the two sub-chips emit different colors of light, thereby achieving the purpose of emitting colored light.

[0094] When an array is formed using multiple sub-chips, at least two light-emitting chips in the LED array light source 1 may include sub-chips of the same color. The placement orientation of these two sub-chips of the same color within their respective light-emitting chips may be different.

[0095] For example, the red sub-chip is located in the upper left corner of the upper left light-emitting chip, in the upper right corner of the upper right light-emitting chip, in the lower left corner of the lower left light-emitting chip, and in the lower right corner of the lower right light-emitting chip. This is more conducive to the mixing of different colors.

[0096] It's easy to understand that colored light is a common requirement in stage lighting applications. Of course, colored light can also be achieved by passing white light through color filters. For example, multiple sub-chips can be used to emit white light, and different colored filters can be set on the light-emitting side of different sub-chips, so that the white light emitted by different sub-chips can pass through different colored filters to achieve different colored light.

[0097] Compared to setting up filters, selecting a sub-chip that can emit multiple different colors of light within the same light-emitting chip makes the light emission control process of the light-emitting chip more convenient, and the number of colored light colors is not limited by the number of color filters.

[0098] Specifically, the light-emitting device in this embodiment further includes a light-collecting device array 2. The light-collecting device array 2 may include at least two convex lenses.

[0099] For example, the number of convex lenses can be set to two. The two convex lenses can be aligned sequentially with the light-emitting surface of the corresponding light-emitting chip, and the geometric axes of the two convex lenses can be arranged perpendicular to the light-emitting surface of the light-emitting chip. The light-emitting chip can emit light towards the two convex lenses, and the light from the light-emitting chip can be refracted by the two convex lenses and then exit from the light-emitting port of the light-collecting device.

[0100] The light-collecting device's exit port can be determined based on the diameter of the convex lenses. When both convex lenses have the same diameter, the inscribed circle diameter of the light-collecting device's exit port can be equal to the diameter of the convex lens. When the two convex lenses have different diameters, the inscribed circle diameter of the light-collecting device's exit port can be equal to the larger of the two convex lenses. For example, the light-collecting device's exit port diameter can be equal to the diameter of the convex lens furthest from the light-emitting chip.

[0101] The light collection device is configured with at least two convex lenses, which allows the specifications of the convex lenses in the light collection device to be adjusted according to the needs of the light collection device. The combination of at least two convex lenses is more flexible, and the selection and adjustment process of the convex lenses is more convenient.

[0102] In one example, a light-emitting chip with a diameter (r) of 0.7 mm can be selected. The light-collecting device includes two convex lenses. The diameter R of the convex lens furthest from the light-emitting chip (i.e., the inscribed circle diameter of the light-collecting device's output port) can be set to 2.1 mm. In this case, R = 3r, and the divergence angle of the light beam between the light-emitting chip and the light-collecting device is approximately 39 degrees, which better balances the heat dissipation of the light-emitting chip and the size of the light-emitting device.

[0103] In some possible implementations, the light collecting device may include a reflector cup having opposing light inlets and light outlets, and a reflective inner wall located between the light inlets and light outlets.

[0104] For example, the light inlet of the reflector cup can face the light-emitting surface of the corresponding light-emitting chip. The light emitted by the light-emitting chip is at least partially incident on the reflective inner wall of the reflector cup and reflected before exiting from the light outlet of the reflector cup. The light outlet of the reflector cup is the light outlet of the light collection device.

[0105] It is easy to understand that the diameter of the light inlet of the reflector cup can be less than or equal to the diameter of the light outlet of the reflector cup. In the direction away from the corresponding light-emitting chip, the diameter of the inner wall of the reflector cup can gradually increase so that the light from the light-emitting chip can be reflected by the inner wall of the reflector cup and emitted from the light outlet of the reflector cup.

[0106] By setting up a reflector, the reflector can be used to collect light from the light-emitting chip. The shape and structure of the reflector are more stable, and the assembly process of the reflector is also more convenient compared to multiple convex lenses.

[0107] In one example, a light-emitting chip with a diameter (r) of 0.7 mm can be selected, and a reflector can be used as the light-collecting device. The light inlet of the reflector can be close to the light-emitting surface of the chip, and the diameter R of the light outlet of the reflector (i.e., the diameter of the inscribed circle of the light outlet of the light-collecting device) can be set to 2.1 mm. In this case, R = 3r, and the divergence angle of the light beam between the chip and the light-collecting device is approximately 39 degrees, which can better balance the heat dissipation of the chip and the size of the device.

[0108] In some possible implementations, the number of LED array light sources is at least two, the LED array light sources emit different colors, and each LED array light source can emit light toward the corresponding light collection device array.

[0109] For example, an LED light-emitting device may include a first LED array light source and a corresponding light-collecting device array, or a second LED array light source and a corresponding light-collecting device array, wherein the first LED array light source and the second LED array light source emit different colors.

[0110] The LED light-emitting device may also include a beam splitter filter, which can transmit light emitted by a first LED array light source and reflect light emitted by a second LED array light source. The light emitted by the first LED array light source is collected by a corresponding light-collecting device array and then emitted and transmitted through the beam splitter filter to form a first emitted light. The light emitted by the second LED array light source is collected by a corresponding light-collecting device array and then emitted and reflected by the beam splitter filter to form a second emitted light. The first emitted light and the second emitted light are combined into a single beam and then incident on a transmission lens.

[0111] For example, the number of LED array light sources can be set to three or more. For instance, the number of LED array light sources can be set to three, and the three LED array light sources can be used to emit red light, green light and blue light respectively, with at least two of the three LED array light sources having different light emission directions.

[0112] The number of light-collecting device arrays can be the same as the number of LED array light sources. For example, the number of light-collecting device arrays can be set to three. Each LED array light source can emit light towards its corresponding light-collecting device array, and the light-collecting device array can acquire the light from the corresponding LED array light source and emit it through the light-collecting device's output port.

[0113] For example, a beam splitter filter can have multiple incident surfaces and exit surfaces. The beam splitter filter can acquire outgoing light from multiple light collection device arrays through multiple incident surfaces, so as to combine the outgoing light from multiple light collection device arrays through the beam splitter filter. The beam splitter filter can emit light towards the transmission lens through the exit surface to achieve colored light of different colors.

[0114] The number of incident surfaces can be set to three. The three LED array light sources can emit light towards the incident surface through the corresponding light collection device array, so that the beam splitter can combine the light from the three LED array light sources to form colored light, and the colored light can propagate towards the transmission lens.

[0115] The function of a beam splitter is to reflect light of a certain wavelength (e.g., a certain color) while transmitting light of other wavelengths. The wavelengths of the reflected and transmitted light can be set during the design of the beam splitter. By using a beam splitter, light of different colors can be coupled together for emission, thus multiplexing the same optical path for different colors of light, thereby increasing brightness.

[0116] The shape of the beam-splitter filter can be set as a quadrangular prism (e.g., a cuboid or a cube). The three light-incident surfaces and one light-outcrystal surface of the beam-splitter filter can be connected in sequence, wherein two light-incident surfaces (e.g., the first light-incident surface and the second light-incident surface) are arranged opposite each other, and the other light-incident surface (e.g., the third light-incident surface) is arranged opposite to the light-outcrystal surface.

[0117] When light from three LED array light sources is combined using a beam-splitting filter, the light emitted from the two LED array light sources facing the first and second incident surfaces is reflected by the beam-splitting filter, allowing the light to exit from the exiting surface. The light emitted from the LED array light source facing the third incident surface is transmitted through the beam-splitting filter, allowing the light to exit from the exiting surface, thus achieving the light combination process.

[0118] It should be noted that since there are multiple LED array light sources, at least some of the LED array light sources are arranged in different directions. Compared with the collimating lens array method in related technologies, the size of the beam splitter filter in this solution is reduced in at least two directions, which makes the overall volume of the beam splitter filter smaller.

[0119] Alternatively, the beam splitter can be shaped like a sheet (e.g., a dichroic mirror), and the number of beam splitters can be at least one. A beam splitter can reflect light of a certain wavelength while transmitting light of other wavelengths. Some of the light from the LED array light source can change direction after reflection by the beam splitter, while the light from another portion of the LED array light source can pass through the beam splitter, making the exit directions of the light from multiple LED array light sources the same, thus achieving light combining. The surface of the beam splitter that faces the light-emitting surface of the LED array light source is the incident surface, and the surface that exits towards the guiding lens is the exit surface.

[0120] Three LED array light sources can be placed at different positions of the light combining element, making the structure of the light combining element smaller. The side length of the light combining element can be determined based on one LED array light source, thus making the overall structure composed of the LED array light source, light collection device array, light combining structure and transmission lens more compact.

[0121] When the light combining element is set as one or more light-splitting filters, the combined light brightness formed by the LED array light source, the light collection device array, and the light combining structure is greater, resulting in better light emission effect of the LED light-emitting device.

[0122] Specifically, the light-emitting device in this embodiment also includes a conductive lens 3, which can be disposed on the light-emitting side of the light-collecting device array 2. In a plane parallel to the light-emitting surface of the light-emitting chip, the area of ​​the conductive lens 3 can be larger than the area of ​​the light-collecting device array 2, so that the conductive lens 3 can acquire light from the light-collecting device array 2.

[0123] In some possible implementations, the transmission lens 3 can be configured as a convex lens. For example, the transmission lens 3 can be configured as a plano-convex lens, or it can be configured as a biconvex lens.

[0124] Alternatively, the transmission lens 3 can be configured as a Fresnel lens to reduce the thickness of the transmission lens 3, thereby further reducing the size of the light-emitting device.

[0125] It should be noted that by setting a guiding lens 3 at the rear end of the optical path of the light collecting device array 2, the guiding lens 3 can converge the incident parallel light to form a focal point. Therefore, the collimated portion of the light emitted from the light collecting device array 2 can be converged to the focal point after passing through the guiding lens 3.

[0126] However, as mentioned above, the core of this solution lies in forming a light spot based on non-collimated light. That is, the design goal of the light collection device array 2 in this embodiment is different from that of traditional stage lighting sources. That is, it does not pursue collimated light output by the light collection device array 2. On the contrary, the light collection device array 2 in this solution is used to output non-collimated light.

[0127] The transmission lens 3 can be used to receive and transmit light emitted from the light collection device array 2, so that the upward-biased large-angle beam (i.e. upward edge beam) in the light from the light collection device array 2 can form an upper focal point after passing through the transmission lens 3, which is located above the focal point of the transmission lens 3.

[0128] Meanwhile, the downward-biased large-angle beam (i.e., the downward edge beam) from the light collecting device array 2 can form a lower focal point after passing through the guiding lens 3. Therefore, all the light emitted from the light collecting device array 2, after passing through the guiding lens, will form a relatively large spot on the focal plane of the guiding lens 3 (i.e., the plane that passes through the focal point and is perpendicular to the optical axis), and the boundary of this spot is the upper focal point and the lower focal point.

[0129] All light emitted from the light-collecting array 2, after passing through the guiding lens 3, forms a relatively large guided light spot on the focal plane of the guiding lens 3. The guided light spot can be configured such that, when no light deflection structure (e.g., an angle-adjusting lens) is provided at the rear end of the guiding lens 3, the guided light spot is located on the focal plane of the guiding lens 3. For example, the guided light spot can also be understood as the smallest light spot near the focal plane of the guiding lens 3, and the boundary of this guided light spot is the boundary between the upper and lower focal points.

[0130] Obviously, the larger the angle of the light emitted from the light-collecting device array 2, the larger the diameter of the transmitted light spot formed on the focal plane of the transmitting lens 3. For example, the transmitting lens 3 can converge incident parallel light to form a focal point; the focal length of the transmitting lens 3 is F1. The transmitting lens 3 is used to receive light emitted from the light-collecting device array 2, and the circumcircle diameter of the light spot incident on the surface of the transmitting lens 3 is D1, where 0.4F1≤D1≤2F1. This ensures control over the divergence angle of each emitted light beam, better handling of the divergent light emitted from the light-collecting device, and better formation of the light spot. As an example, the ratio of the circumcircle diameter D1 of the light spot incident on the surface of the transmitting lens 3 to the focal length F1 of the transmitting lens 3 can be set within any range of 0.4-0.6, 0.6-0.8, 0.8-1, 1-1.2, 1.2-1.4, 1.4-1.6, 1.6-1.8, and 1.8-2.

[0131] In theoretical analysis, the diverging light incident on the transmission lens can be considered as a combination of many beams of parallel light propagating in different directions. Each such beam of parallel light converges after passing through the transmission lens, and its divergence angle is limited by 0.4F1≤D1≤2F1. The larger F1 is and the smaller D1 is, the smaller the divergence angle; the smaller F1 is and the larger D1 is, the larger the divergence angle. In practical applications, since a projection lens is needed at the rear end of the light-emitting device to receive the light emitted by the device, a more preferred value is 0.6F1≤D1≤1.2F1. The divergence angle within this range is acceptable for commonly used projection lenses, facilitating subsequent adaptation.

[0132] It should be noted that the function of the guiding lens 3 is different from that of the converging lens in related technologies. Instead, it serves to guide the light beam. Since the cross-sectional area of ​​the light beam does not decrease significantly to form a focal point, it is distinguished from the converging lens in related technologies. In this paper, it is referred to as the guiding lens 3.

[0133] Although the transmission lens 3 can still focus the parallel collimated light at the focal point, only a small portion of the parallel collimated light is emitted from the light collection array 2 toward the transmission lens 3. Most of the light is still divergent. Therefore, the cross-sectional area of ​​the beam passing through the transmission lens 3 does not significantly decrease to form a focal point. Thus, the transmission lens 3 cannot be simply defined as a focusing lens.

[0134] The above description restricts the relationship between r and R (i.e., restricts the degree of divergence of the light collected by the light-collecting device), and also restricts the relationship between D1 and F1 (i.e., restricts the divergence angle of the sub-parallel beam at the guide spot after passing through the guide lens 3). Furthermore, by reasonably setting the values ​​of r, R, D1, and F1, the brightness of the light spot can be maximized under the same efficiency conditions.

[0135] In one example, the relationship between r, R, D1, and F1 satisfies the condition that the divergence of the light from the light-collecting device matches the divergence angle of the sub-parallel beam at the guide spot after passing through the guide lens 3. Specifically, in one example, r, R, D1, and F1 satisfy the following relationship:

[0136] ;

[0137] This relationship defines the degree of divergence of the light emitted by the light-collecting device as matching the divergence angle of the sub-parallel beam at the guide spot after passing through the guide lens 3. When this matching relationship is satisfied, the light efficiency is higher, and the light intensity is less likely to be diluted, meaning the light brightness is higher.

[0138] In one example, a light-emitting chip with a radius r of 0.7 mm can be selected, meaning the inscribed circle diameter R of the light-collecting device's output port can be set to 2.1 mm. In this case, R = 3r, and the divergence angle of the light beam between the light-emitting chip and the light-collecting device is approximately 39 degrees.

[0139] In other words, The value can be approximately set to greater than or equal to 11.7 degrees and less than or equal to 29.25 degrees, so that the setting method (such as parameters and setting position) of the transmission lens can be determined according to the divergence angle of the beam between the light-emitting chip and the light-collecting device.

[0140] The size of the focused light spot formed by the conventional light source is made equal to the size of the conducted light spot formed by the scheme in this embodiment. That is, when light spots of the same size are formed (i.e., the luminous performance is basically the same), the volume difference between the two systems is compared. It can be seen that in all directions, the size of this embodiment is reduced by more than half in each direction. In other words, the volume of this embodiment is only (1 / 2) that of the conventional light source. 3 =1 / 8.

[0141] In one example, the circumcircle diameter of the LED array light source is M, and the circumcircle diameter of the smallest light spot (i.e., the conducted light spot) formed by the light-emitting device at the rear end of the optical path of the conducting lens 3 is N. Preferably, M ≤ 2.5N. The light spot formed under this condition can be regarded as a light spot generated by "conduction" rather than a light spot generated by "focusing" in the traditional solution. It should be noted that in other examples, even without setting an angle adjustment lens, the volume of the light-emitting device provided in this embodiment is significantly reduced compared to the volume of the light source device in the traditional solution.

[0142] The outer circle diameter of an LED array light source refers to the outer circle diameter of the light-emitting area of ​​the LED array light source, excluding non-light-emitting areas such as the substrate. The outer circle diameter of an LED array light source can be used to indicate the size of the light-emitting area of ​​the LED array light source.

[0143] It should be noted that in related technologies, due to the limitation of the large size of the collimating lens, the distance between the light-emitting chips in the LED array light source also needs to be increased in order to ensure the arrangement of the collimating lenses in the collimating lens array. This also makes the light-emitting device in related technologies larger in size.

[0144] In this embodiment of the application, by using the matching LED array light source 1 and light collection device array 2, the size of the light collection device is reduced, thereby reducing the distance between the light-emitting chips in the LED array light source 1 and reducing the overall volume of the LED array light source 1.

[0145] Furthermore, since the volume of the light collection device array is smaller than that of the collimating lens array, the volume of the conducting lens 3 located at the rear end of the light collection device array 2 in this embodiment is also reduced compared to the converging lens located at the rear end of the collimating lens array in related technologies. This further reduces the volume of the light-emitting device and lowers the overall cost of the light-emitting device.

[0146] In some possible implementations, the light-emitting device further includes a light-uniforming structure 5 located between the light-collecting device array 2 and the transmission lens. The light-uniforming structure 5 is capable of receiving light from the light-collecting device array 2 and allowing the light to propagate through the light-uniforming structure 5 to the transmission lens. The light-uniforming structure 5 is capable of homogenizing the incident light from the light-collecting device array 2 to improve the uniformity of the incident light.

[0147] For example, the homogenizing structure 5 may include a plurality of compound eye lenses. The plurality of compound eye lenses may include a first compound eye lens and a second compound eye lens arranged sequentially along the optical path. The first compound eye lens includes a plurality of first convex lenses arranged closely together, and the second compound eye lens includes a plurality of second convex lenses arranged closely together. The first compound eye lens and the second compound eye lens are capable of homogenizing the incident light.

[0148] The first compound eye lens and the second compound eye lens can be arranged alternately, and the propagation medium between the first compound eye lens and the second compound eye lens can be air or the like. The first compound eye lens can be located on the side of the second compound eye lens closer to the light collecting array, so that the light from the light collecting array 2 can pass through the first compound eye lens and the second compound eye lens in sequence.

[0149] Alternatively, the first and second compound eye lenses can be integrally formed to create a single compound eye lens body, with the first and second compound eye lenses forming two opposing surfaces of the compound eye lens body. The first compound eye lens can be positioned as the portion of the compound eye lens body facing the light-collecting device, and the second compound eye lens can be positioned as the portion of the compound eye lens body away from the light-collecting device.

[0150] By integrating the first compound eye lens and the second compound eye lens to form a compound eye lens body, the propagation medium between the first compound eye lens and the second compound eye lens can be set as an optical medium.

[0151] In this embodiment, the light emitted from the light collecting device array 2 is divergent light. Because the divergent light has a large divergence angle, it shortens the optical path between the two compound eye lenses. This also makes the distance between the two compound eye lenses in the compound eye lens body smaller, and can correspondingly reduce the thickness of the compound eye lens body, thereby reducing the volume of the light-emitting device and increasing the brightness of the light-emitting device.

[0152] Furthermore, compared to two separate compound eye lenses, a one-piece compound eye lens has a lower cost. Due to the small size of the light-emitting device, the technical difficulty of one-piece molding of the compound eye lens is greatly reduced, the area of ​​the compound eye lens is also greatly reduced, and the cost is significantly lowered.

[0153] As mentioned above, the compound eye lens and uniform light structure 5 are not essential in the embodiment of the angle-adjusting lens 4 of this application, but their use can further improve uniformity. Furthermore, if the light-emitting chip comprises multiple sub-chips, using a compound eye lens can improve the uniformity of color mixing.

[0154] The uniform light structure 5 may not be set between the light collection device array 2 and the transmission lens 3. Compared with the traditional focused light spot, the transmission light spot generated by transmission has a significant advantage. When the projection lens of the rear optical path zooms, there must be a focusing process. During this focusing process, the projected light spot is in a defocused state. However, in practice, even in the defocused state during the focusing process, the uniformity of the light spot cannot be too bad.

[0155] Compared to traditional focused light spots, the guided light spot generated by the guided lens in this embodiment has a significant advantage. When the projection lens in the rear optical path zooms, there is inevitably a focusing process. During this focusing process, the projected light spot is out of focus. For traditional light sources, the light spot shrinks rapidly during the focusing process, resulting in obvious stripes, i.e., poor uniformity of the light spot.

[0156] In this scheme, the light spot size does not rapidly shrink during the transmission process after passing through the transmission lens 3. Therefore, even when the light defocuses during focusing, the uniformity of the entire light spot remains relatively good. Another difference between this scheme and traditional schemes is that, for traditional light sources, due to the rapid shrinkage of the light spot during focusing, a compound eye lens is necessary to achieve uniformity in the defocused state. However, this scheme eliminates the need for a compound eye lens, thus saving costs. Furthermore, eliminating the need for a compound eye lens in this scheme also improves the brightness of the light-emitting device.

[0157] Furthermore, traditional solutions, in order to achieve uniformity in defocused conditions, use compound lenses. The resulting light spot shape matches the imaging shape of the compound lens (e.g., hexagonal). This means that regardless of the shape of the light-emitting surface of the LED (e.g., circular or rectangular), the resulting light spot is always hexagonal. Stage lighting typically requires circular light spots, necessitating the use of a circular aperture to cut the hexagonal spot into a circle, resulting in energy loss at the six corners, typically 20-30%. This new solution eliminates the need for compound lenses. Therefore, while maintaining uniformity in defocused conditions, the light spot shape can reflect the shape of the LED's light-emitting surface, for example, appearing square or circular. To achieve a circular light spot, an LED with a circular light-emitting surface can be used directly, eliminating the need for an aperture and minimizing light loss.

[0158] For example, the light-emitting device includes a light-diffusing device, which can be configured as a diffuser 6. The diffuser 6 can be located at the rear end of the optical path of the transmission lens 3 (i.e., the light-emitting side of the transmission lens 3), thereby homogenizing the transmitted light spot formed by the transmission lens 3.

[0159] The size of the light spot is proportional to the sum of the sizes of the light-emitting surfaces of each chip in the LED array light source. In the system design, it is desirable that the divergence angle of the light is determined by the convergence angle, which is determined by the effective aperture D1 and focal length F1 of the transmission lens 3. As the light spot size increases, the overall upward and downward deflection of the beam may introduce additional offset angles. When the light spot size is large, the superposition of the beam angle and offset angle may produce light rays with larger angles.

[0160] Therefore, in one example, the LED light-emitting system may include an angle-adjusting lens 4. The angle-adjusting lens 4 may be disposed at the rear end of the optical path of the transmission lens 3 (i.e., the light-emitting side of the transmission lens 3) to adjust and correct the transmitted light spot formed by the transmission lens 3.

[0161] For example, the angle-adjusting lens 4 can be located near the focal plane of the transmission lens 3. The angle-adjusting lens 4 has little effect on the incident beam from the transmission lens 3 and its own divergence angle, but it has a corrective effect on the overall deflection angle of the incident beam. For instance, in the incident beam from the transmission lens 3, upward-deflected edge-angle beams incident on the angle-adjusting lens 4 undergo overall downward correction, while downward-deflected edge-angle beams incident on the angle-adjusting lens 4 undergo overall upward correction. Ultimately, the angle of the light exiting from the angle-adjusting lens 4 is reduced and equal to the divergence angle of each beam itself.

[0162] Since the angle-adjusting lens 4 is located near the focal plane of the transmission lens 3, it has virtually no effect on the size of the light spot on the focal plane. In summary, the angle-adjusting lens 4 has no effect on the size of the light spot, while reducing the angle of the light emitted from the light spot, thus solving the problem of edge beam angle deflection caused by the increase in the size of the light spot.

[0163] Based on the above description of the principle and professional optical knowledge, it can be deduced that the light spot is the superposition of images from the emitting surfaces of multiple light-emitting chips. In this scheme, since the light spot is not formed by "focusing" but by "conduction," it is called a "conduction light spot." In the embodiments of this application, the transmission light spot refers to the light spot at the smallest position near the focal plane of the transmission lens 3. When the emitting surface of the light-emitting chip is circular, the shape of the transmission light spot is closer to a circle, which is also the most commonly used light spot shape in practice.

[0164] The LED light-emitting system of this embodiment utilizes divergent light (only a small portion of which is collimated) emitted from a light-collecting device, which is then incident on a guiding lens 3. The guiding lens 3 "guides" the incident light to the vicinity of the focal plane, forming a guided light spot. An angle-adjusting lens 4 then corrects the overall beam angle. Compared to traditional light source structures, the light-emitting device of this embodiment significantly reduces the system size while maintaining the same area and angle of the light spot, thus enabling stage lights using this light source to have a smaller size and lower cost.

[0165] For example, the angle adjustment lens 4 is located near the focal plane of the transmission lens 3. Specifically, the distance from the vertex of the light-emitting surface of the transmission lens 3 to the vertex of the light-incident surface of the angle adjustment lens 4 is L. The transmission lens 3 and the angle adjustment lens 4 can be configured such that: L≤1.5F1.

[0166] For example, the angle-adjusting lens has a converging effect on incident parallel light. It receives light emitted from the transmission lens 3, and the circumcircle diameter of the light spot incident on the surface of the angle-adjusting lens is D2. The focal length of the angle-adjusting lens 4 is F2, where 0.4F2≤D2≤2F2. The ratio of the focal length F2 of the angle-adjusting lens 4 to the circumcircle diameter D2 of the light spot incident on the surface of the angle-adjusting lens 4 can be set within any range of 0.4-0.6, 0.6-0.8, 0.8-1, 1-1.2, 1.2-1.4, 1.4-1.6, 1.6-1.8, and 1.8-2. For example, the angle-adjusting lens 4 can be configured such that 0.6F2≤D2≤1.2F2. Through this relationship setting, the angle-adjusting lens 4 can correct for potentially large-angle deviations in light rays that may occur in schemes based on non-collimated light forming of light spots, thereby improving the light spot quality.

[0167] The distance from the vertex of the light-emitting surface of the transmission lens to the vertex of the light-receiving surface of the angle-adjusting lens is greater than or equal to 0.5 times the focal length of the transmission lens and less than or equal to 1.5 times the focal length of the transmission lens. The transmission lens 3 and the angle-adjusting lens 4 can be configured as follows: 0.5F1≤L≤1.5F1.

[0168] For example, the transmission lens 3 and the angle adjustment lens 4 can be configured such that 0.5F1≤F2≤1.5F1. The focal length of the angle adjustment lens 4 can be equal to or approximately equal to the distance between the angle adjustment lens 4 and the transmission lens 3, in order to improve the correction effect of the angle adjustment lens 4 on the transmitted light spot.

[0169] The distance from the vertex of the light-emitting surface of the transmission lens 3 to the vertex of the light-incident surface of the angle-adjusting lens 4 can be used to represent the distance between the transmission lens 3 and the angle-adjusting lens 4. The distance from the vertex of the light-emitting surface of the transmission lens 3 to the vertex of the light-incident surface of the angle-adjusting lens 4 can be used to represent the distance between the transmission lens 3 and the angle-adjusting lens 4 along the optical axis of the transmission lens 3.

[0170] For example, the distance L from the vertex of the light-emitting surface of the transmission lens 3 to the vertex of the light-receiving surface of the angle-adjusting lens 4 can be equal to the focal length F1 of the transmission lens 3. That is, the angle-adjusting lens 4 is located on the focal plane of the transmission lens 3. When the distance L from the vertex of the light-emitting surface of the transmission lens 3 to the vertex of the light-receiving surface of the angle-adjusting lens 4 is equal to the focal length F1 of the transmission lens 3, the focal length F2 of the angle-adjusting lens 4 can be the same as the focal length F1 of the transmission lens 3. That is, the transmission lens 3 and the angle-adjusting lens 4 can be configured such that F2 = F1.

[0171] Alternatively, the distance L from the vertex of the light-emitting surface of the transmission lens 3 to the vertex of the light-receiving surface of the angle-adjusting lens 4 can be less than the focal length F1 of the transmission lens 3. That is, the angle-adjusting lens 4 is located between the focal plane of the transmission lens 3 and the transmission lens 3. The transmission lens 3 and the angle-adjusting lens 4 can be configured such that: 0.5F1≤L≤F1.

[0172] The angle-adjusting lens 4 not only corrects the beam's polarization but also provides an additional converging effect, increasing the beam's divergence angle (the beam converges first, then diverges after passing the focal point. Therefore, the divergence angle after the focal point is equal to the convergence angle before the focal point. The additional converging effect of the angle-adjusting lens 4 increases the convergence angle, thus increasing the beam's divergence angle). Simultaneously, due to the earlier occurrence of the beam polarization correction, the size of the transmitted light spot is correspondingly reduced.

[0173] Therefore, compared to the method of setting the angle adjustment lens 4 on the focal plane of the transmission lens 3, it is also permissible to move the angle adjustment lens 4 toward the transmission lens 3 so that the angle adjustment lens 4 can increase the beam divergence angle and reduce the spot size while maintaining the same energy density.

[0174] However, if the distance between the angle adjustment lens 4 and the transmission lens 3 is less than 0.5F1, the angle correction effect of the angle adjustment lens 4 will become weaker and weaker, while the focusing effect on the beam itself (after focusing, it continues to propagate and becomes a diverging effect) will become stronger and stronger, until the angle adjustment lens 4 is completely close to the transmission lens 3, at which point the angle adjustment lens 4 will completely lose its angle adjustment function.

[0175] Therefore, the approach of the angle-adjusting lens 4 towards the transmission lens 3 should be limited. The distance from the vertex of the light-emitting surface of the transmission lens 3 to the vertex of the light-receiving surface of the angle-adjusting lens 4 is L, and the distance from the vertex of the light-emitting surface of the angle-adjusting lens 4 to the position of the smallest light spot at the rear end of the optical path of the angle-adjusting lens 4 (i.e., the position that can represent the transmission light spot) is L', where L' ≤ L. That is, relative to the transmission lens 3, the angle-adjusting lens 4 should be closer to the transmission light spot, and the light emission effect is better within this range.

[0176] When the distance L from the vertex of the light-emitting surface of the transmission lens 3 to the vertex of the light-receiving surface of the angle-adjusting lens 4 is less than the focal length F1 of the transmission lens 3, the focal length F2 of the angle-adjusting lens 4 can be reduced to meet the needs of angle adjustment. In other words, the transmission lens 3 and the angle-adjusting lens 4 can be configured such that F2 ≤ F1.

[0177] For example, when the distance L from the vertex of the light-emitting surface of the transmission lens 3 to the vertex of the light-receiving surface of the angle-adjusting lens 4 is less than the focal length F1 of the transmission lens 3, as long as L'≤L, the correction effect on the transmitted light spot can be achieved. At this time, the transmitted light spot is also reduced (the corresponding divergence angle increases).

[0178] It is easy to understand that the reduction in the light conduction spot is not entirely due to convergence as in traditional structures, but rather represents an acceptable aspect of light "conduction".

[0179] For example, the outer diameter of the light-emitting chip array is M, and the outer diameter of the smallest light spot (i.e., the transmitted light spot) formed by the light-emitting device at the rear end of the optical path of the transmission lens 3 is N. Preferably, M≤2.5N. At this time, the size of the transmitted light spot is still relatively large (N≥M / 2.5), and it can be regarded as a light spot generated by "conduction" rather than a light spot generated by "focusing".

[0180] Alternatively, the distance L from the vertex of the light-emitting surface of the transmission lens 3 to the vertex of the light-receiving surface of the angle-adjusting lens 4 can be greater than the focal length F1 of the transmission lens 3. That is, the angle-adjusting lens 4 is located on the side of the focal plane of the transmission lens 3 away from the transmission lens 3. The transmission lens 3 and the angle-adjusting lens 4 can be configured such that: F1≤L≤1.5F1.

[0181] When the distance L from the vertex of the light-emitting surface of the transmission lens 3 to the vertex of the light-receiving surface of the angle-adjusting lens 4 is greater than the focal length F1 of the transmission lens 3, the focal length F2 of the angle-adjusting lens 4 can be increased to meet the needs of angle adjustment. In other words, the transmission lens 3 and the angle-adjusting lens 4 can be configured such that F2 ≥ F1.

[0182] It should be noted that when an angle adjustment lens is set at the rear end of the transmission lens 3, and the angle adjustment lens 4 is located between the focal plane of the transmission lens 3 and the transmission lens 3, since the light emitted from the transmission lens 3 does not form a transmission spot when it reaches the angle adjustment lens 4, the angle adjustment lens will have a certain focusing effect on the light from the transmission lens 3, causing the formation position of the transmission spot to move forward, and the position of the transmission spot is in front of the focal plane.

[0183] When an angle-adjustable lens is set at the rear end of the transmission lens 3, in some possible cases, the transmission spot can also be understood as the smallest spot formed at the rear end of the transmission lens 3.

[0184] In some possible implementations, the angle-adjusting lens 4 can be configured as a convex lens. For example, the angle-adjusting lens 4 can be configured as a plano-convex lens, or it can be configured as a biconvex lens.

[0185] Alternatively, the angle adjustment lens 4 can be set as a Fresnel lens to reduce its thickness. This would reduce mechanical interference issues when using optical processing devices such as apertures and color filters near the light transmission spot, making it easier to use. Moreover, the Fresnel lens itself also has a certain light homogenization function.

[0186] In practice, since the transmitted light spot is the smallest light spot in the light path, it also has the highest brightness. The pattern stop is best placed at the position of the transmitted light spot. The distance between the pattern stop and the vertex of the light-emitting surface of the angle adjustment lens 4 is less than half of F1. This can ensure that the brightness of the light at the pattern stop is as high as possible, so that the brightness of the pattern light projected to the far field through the projection lens is also as high as possible.

[0187] In some possible implementations, the LED light-emitting system includes a dimming device located between the conductive lens 3 and the angle-adjusting lens 4.

[0188] Dimming devices can be used to adjust the color, color temperature, angular distribution, or surface distribution of light. For example, a dimming device is a CMY filter that has a light-transmitting area, which includes a colorless transparent area and a colored area, with the colorless transparent area and the colored area intermingled. In at least two sub-regions within the light-transmitting area, the area ratio of the colorless transparent area to the colored area is different.

[0189] In this way, gradient colors can be achieved by placing different positions within the light-transmitting area in the optical path. Since the dimming device is located between the transmission lens 3 and the angle adjustment lens 4, the projection lens does not image it, thus naturally achieving color mixing between the colorless transparent area and the colored area within the light-transmitting area.

[0190] In addition to CMY filters enabling color control, dimming devices can include multiple components to control other optical effects such as angular distribution and surface distribution.

[0191] This application provides a lighting fixture that may include a patterned aperture located near an angle-adjustable lens 4. The patterned aperture may be located at the front or rear of the optical path of the angle-adjustable lens 4. The patterned aperture includes a light-transmitting area with a pattern.

[0192] The pattern stop can be used in conjunction with a projection lens to project the pattern of the light-transmitting area of ​​the pattern stop into the far field. The distance between the pattern stop and the vertex of the light-emitting surface of the angle-adjusting lens 4 is less than half of F1, where F1 is the focal length of the transmission lens 3.

[0193] As can be seen from the previous implementation method, the angle adjustment lens 4 can be located at the front end of the optical path of the light transmission spot or at the rear end of the optical path of the light transmission spot. The distance between the angle adjustment lens 4 and the light transmission spot is generally less than half of F1.

[0194] The structure of the light-emitting system is described below with reference to several exemplary embodiments. In the following multiple embodiments, the distinguishing technical features between the embodiments are not limited to their respective embodiments, but can be applied to all embodiments.

[0195] It is impossible to list all possible combinations in the description of the embodiments of this application. Therefore, the implementation principles and beneficial effects of each technical feature are explained by way of example. When applied to other implementation methods, those skilled in the art will use their implementation principles to achieve the beneficial effects.

[0196] Implementation Method 1

[0197] like Figure 2As shown, the light-emitting device includes an LED array light source 401, which includes multiple light-emitting chips. The light-emitting device also includes a light-collecting device array 402, which includes multiple light-collecting devices, each corresponding to a light-emitting chip. The light-collecting device is used to collect the light emitted by the corresponding light-emitting chip and emit the light through the light-emitting port of the light-collecting device.

[0198] The radius of the inscribed circle of the light-collecting device's output port is R, and the radius of the inscribed circle of the corresponding light-emitting chip's emitting surface is r, where 1.5r ≤ R ≤ 5r. As mentioned above, R ≤ 5r is to reduce the system's size, but this also results in the light emitted from the light-collecting device array being divergent, with collimated light accounting for only a small portion. 1.5r ≤ R ensures that the light-emitting chips in the LED array are not too close together, and the appropriate spacing between the chips guarantees heat dissipation and extends their lifespan.

[0199] In practical applications, a more preferred value is 2.5r ≤ R ≤ 4r. This relationship better balances heat dissipation of the LED and system size. For example, selecting a circular LED with a radius of r of 0.7mm (approximately 12 watts at full power load, generating about 8 watts of heat), and setting a light-collecting device with an output radius of R = 2.1mm, the light-collecting device is not too small to be difficult to manufacture. Simultaneously, the center-to-center distance between adjacent LEDs is 2R = 4.2mm, which is sufficient to dissipate the heat of a single 8-watt LED. In this case, R = 3r, falling within the preferred range of 2.5r ≤ R ≤ 4r. When R = 2.5r, the volume is smaller; when R = 4r, the spacing between the LEDs is larger, resulting in better heat dissipation and higher efficiency.

[0200] This embodiment also includes a guiding lens 403, which can converge incident parallel light to form a focal point. The focal length of the guiding lens is F1. The guiding lens is used to receive light emitted from the light collecting device array 402. The circumcircle diameter of the light spot area incident on the surface of the guiding lens is D1, and 0.4F1≤D1≤2F1 ensures control over the divergence angle of each emitted light beam. In theoretical analysis, the diverging light incident on the guiding lens 403 can be regarded as a combination of many sub-parallel light beams propagating in different directions. Each such sub-parallel light beam converges after passing through the guiding lens 403, for example... Figure 3a Beam 321 in the middle, Figure 3bThe divergence angles of beams 323 and 324 are limited by 0.4F1≤D1≤2F1. A larger F1 and a smaller D1 result in a smaller divergence angle; conversely, a smaller F1 and a larger D1 result in a larger divergence angle. In practical applications, since a projection lens is needed at the rear end of the light-emitting device to receive the light emitted, a more preferred value is 0.6F1≤D1≤1.2F1. This range of divergence angles is within the range that commonly used projection lenses can handle.

[0201] This embodiment also includes an angle-adjusting lens 404, which has a converging effect on incident parallel light. The angle-adjusting lens receives light emitted from the transmission lens 403 (where beams 423 and 424 are edge-angle beams). The diameter of the circumcircle of the light spot range incident on the surface of the angle-adjusting lens 404 is D2, and the focal length of the angle-adjusting lens is F2, where 0.4F2≤D2≤2F2.

[0202] Preferably, 0.6F2≤D2≤1.2F2. The angle adjustment lens 404 is located near the focal plane of the transmission lens 403. Specifically, the distance from the vertex of the light-emitting surface of the transmission lens to the vertex of the light-incident surface of the angle adjustment lens is L, where L≤1.5F1. The angle adjustment lens 404 has little effect on the divergence angle of the incident beams 423 and 424 themselves, but it has a correction effect on the overall deflection angle of the incident beams 423 and 424. That is, the edge angle beam 423, which is originally deflected upward, is deflected downward as a whole after being incident on the angle adjustment lens 404 to form beam 426. Among them, the ray 423a with the largest angle is deflected into ray 426a after passing through the angle adjustment lens 404. The edge angle beam 424, which is originally deflected downward, is deflected upward as a whole after being incident on the angle adjustment lens 404 to form beam 427. Among them, the ray 424a with the largest angle is deflected into ray 427a after passing through the angle adjustment lens 404. Finally, the angle of the light emitted from the angle adjustment lens 404 is reduced and equal to the divergence angle of each beam itself.

[0203] Since the angle-adjusting lens 404 is located near the focal plane of the transmission lens 403, it has virtually no effect on the size of the light spot 425 on the focal plane. In summary, the angle-adjusting lens 404 has no effect on the size of the light spot 425, while simultaneously reducing the angle of light emitted from the light spot 425, thus solving the problem... Figure 3a and 3b The problem shown is the deflection of the edge beam angle caused by the increase in the size of the light spot.

[0204] Based on the above description of the principle and professional optical knowledge, it can be deduced that the light spot 425 is the superposition of images of the emitting surfaces of multiple light-emitting chips. In the embodiments of this application, since the light spot 425 is not formed by "focusing" but by "conduction," it is called a "conduction light spot" 425. In this specification, the transmission light spot refers to the light spot at the smallest position near the focal plane of the transmission lens. Preferably, the emitting surface of at least one light-emitting chip is circular. This makes the transmission light spot 425 closer to a circle, which is also the most commonly used light spot shape in practice.

[0205] The above combination Figure 2 This document describes the design process and basic principles of Embodiment 1. The LED light-emitting device in this embodiment utilizes divergent light (only a small portion of which is collimated) emitted from a light-collecting device, which is then incident on a guiding lens. The guiding lens "guides" the incident light to the vicinity of the focal plane, forming a guided light spot. An angle-adjusting lens then corrects the overall beam angle. Compared to traditional light source structures, this embodiment significantly reduces the system size while maintaining the same area and angle of the light spot, resulting in stage lights using this light source that are smaller and less expensive.

[0206] Furthermore, preferably, r, R, D1, and F1 satisfy the following relationship:

[0207] ;

[0208] This relationship defines a certain matching relationship between the degree of divergence of the light emitted by the light-collecting device and the divergence angle of the subparallel beam at the guide spot after passing through the guide lens. When this matching relationship is satisfied, the light efficiency is higher, and the light intensity is less likely to be diluted, meaning the light brightness is higher.

[0209] In this embodiment, preferably, the multiple light collecting devices in the light collecting device array 402 are arranged closely together, which can make the light as dense as possible, and increase the light energy density while reducing the module size. More preferably, the light outlet of the light collecting device is circular or hexagonal, or hexagonal with rounded corners, which is the most compact arrangement.

[0210] Based on the above concept, the optical system of the light-emitting device was designed and random ray tracing simulation was performed, such as... Figure 5 As shown, with the transmission lens 503 and the angle adjustment lens 504, it can be seen that random light rays do not undergo a significant reduction and focusing process after passing through the transmission lens 503, but are directly "transmitted" to the angle adjustment lens 504. The simulation process also verifies that the light spot and emission angle formed by the system are consistent with the technical concept of this scheme.

[0211] exist Figure 6 In the middle, put Figure 4 The embodiment shown is the same as Figure 1 The conventional light source shown is compared side-by-side with the conventional light source, where the size of the focused light spot 625a formed by the conventional light source is equal to the size of the conducted light spot 625 formed by this embodiment. That is, when light spots of the same size are formed (i.e., the luminous performance is essentially the same), the volume difference between the two systems is compared. It can be seen that the volume of this embodiment is reduced by more than half in all directions; that is, the volume of this embodiment is only (1 / 2) that of the conventional light source. 3 =1 / 8.

[0212] Implementation Method 2

[0213] Reference Figure 7 Compared to Embodiment 1, in this embodiment, the angle adjustment lens 704 is not placed near the focal plane of the transmission lens 703, but is moved towards the transmission lens 703. Here, 701 is an LED array light source, and 702 is a light collecting device array.

[0214] At this point, referring to the edge angle beam 724, the angle adjustment lens 704 not only corrects the beam 724 but also has an additional converging effect, which increases the divergence angle of the beam 724 itself (the beam converges first, then diverges after passing the focal point. Therefore, the divergence angle after the focal point is equal to the convergence angle before the focal point. The additional converging effect brought by the angle adjustment lens 704 increases the convergence angle, and thus increases the divergence angle of the beam 724).

[0215] Simultaneously, due to the earlier occurrence of the beam correction effect 724, the size of the transmitted beam spot 725 is correspondingly reduced. Therefore, moving the angle adjustment lens closer to the transmitted lens, allowing it to increase the beam divergence angle while decreasing the spot size, while maintaining a constant energy density, is permissible. However, if the angle adjustment lens gets too close to the transmitted lens, its angle correction effect will weaken, while its beam converging effect (which becomes diverging after focusing) will strengthen, until the angle adjustment lens is completely against the transmitted lens, at which point it completely loses its angle adjustment function.

[0216] Therefore, in one example, the distance from the vertex of the light-emitting surface of the transmission lens to the vertex of the light-receiving surface of the angle-adjusting lens is L, and the distance from the vertex of the light-emitting surface of the angle-adjusting lens to the position of the smallest light spot at the rear end of the optical path of the angle-adjusting lens (i.e., the position of the transmission light spot) is L', where L'≤L. That is, relative to the transmission lens, the angle-adjusting lens is closer to the transmission light spot 725, and the light emission effect is better within this range. More preferably, F2≤F1. In this example, when the angle-adjusting lens moves towards the transmission lens, the focal length F2 of the angle-adjusting lens decreases accordingly to adapt to the need for angle adjustment.

[0217] As can be seen in this embodiment, moving the angle adjustment lens 704 slightly towards the transmission lens 703, as long as L'≤L, achieves the beneficial effects of this embodiment. At this time, the transmission spot 725 is also reduced (correspondingly, the divergence angle increases), but this reduction is not entirely due to convergence as in traditional structures; rather, it represents an acceptable situation in light "transmission." The circumcircle diameter of the LED array light source is M, and the circumcircle diameter of the smallest spot (i.e., the transmission spot) formed by the light-emitting device at the rear end of the transmission lens optical path is N. Preferably, M≤2.5N. At this time, the size of the transmission spot 725 is still relatively large (N≥M / 2.5), and it can be considered a spot generated by "transmission" rather than a spot generated by "focusing." Compared to traditional focused spots, the transmission spot generated by transmission has another significant advantage. When the projection lens of the rear optical path zooms, there is inevitably a focusing process. During this focusing process, the projected spot is in a defocused state, and in practice, even in the defocused state during the focusing process, the uniformity of the spot cannot be too poor. For traditional light sources, due to the rapid shrinking of the light spot during focusing, achieving uniformity in the defocused state requires the use of compound eye lenses, such as... Figure 1 The compound eye lens 3.

[0218] In the solution of this patent, the light spot size does not shrink rapidly during the transmission process after passing through the transmission lens. Therefore, even if it is out of focus, its uniformity is relatively good. Thus, compound eye lenses can be eliminated, thereby saving costs.

[0219] and Figure 4 Another difference in the embodiment shown is that a diffuser 708 is used at the rear end of the optical path of the transmission lens 703, which can homogenize the transmission spot 725.

[0220] Implementation Method 3

[0221] Compared with Implementation Method 1, this implementation method differs in the following aspects:

[0222] like Figure 9As shown, the light-emitting device of this embodiment also includes a first compound eye lens 805 and a second compound eye lens 806 arranged sequentially along the optical path between the light-collecting device array 802 and the conducting lens 803. The first compound eye lens 805 includes a plurality of closely arranged first convex lenses, and the second compound eye lens 806 includes a plurality of closely arranged second convex lenses. The compound eye lens pair is used to homogenize the incident light. Since the light-emitting device of this embodiment has a small size, the area of ​​the compound eye lens pair is also greatly reduced, thus significantly reducing the cost. As mentioned above, the compound eye lens is not necessary in this embodiment, but its use can further improve uniformity. In addition, if the light-emitting chip is a multi-color chip (such as...), Figure 12a As shown in the embodiment, using a compound eye lens can improve the uniformity of color mixing.

[0223] The angle adjustment lens 804 in this embodiment is a Fresnel lens. Fresnel lenses are ultra-thin, which can reduce mechanical interference problems when using optical processing devices such as apertures and color filters near the light transmission spot 825, making them more convenient to use. Moreover, Fresnel lenses themselves also have a certain light homogenization function.

[0224] Implementation Method 4

[0225] See Figure 10b Unlike embodiment three, in this embodiment, the first compound eye lens 905a and the second compound eye lens 905b are integrally formed into a compound eye lens body 905, and the first compound eye lens 905a and the second compound eye lens 905b are respectively two opposite surfaces of the compound eye lens body 905. The design of the compound eye lens body 905 is equivalent to... Figure 10a In this embodiment, the air layer between the two independent compound eye lenses is replaced with an optical medium, which lengthens the optical path. However, the light emitted from the light-collecting array 902 in this application is divergent. Because the angle is large, the optical path between the two compound eye lenses is shortened. Therefore, using a compound eye lens body 905 in this embodiment is possible without making the compound eye lens body 905 too thick due to an excessively long optical path. Furthermore, due to the reasons mentioned above, the compound eye lens can be made very small, thus significantly reducing the technical difficulty of integral molding. Clearly, compared to two separate compound eye lenses, the integrally molded compound eye lens body 905 has a lower cost. This embodiment and... Figure 10a Another difference in the illustrated embodiment is that the angle-adjusting lens 904 can also be located at the rear end of the optical path of the focal plane of the transmission lens, as long as it is near the focal plane of the transmission lens (near the transmission spot 925) and satisfies L≤1.5F. 1， This can achieve the effect of correcting the angle of light emission.

[0226] Implementation Method 5

[0227] The difference between this embodiment and the aforementioned embodiments is as follows:

[0228] Reference Figure 11 In the aforementioned embodiments, the light-collecting device is a lens group, which includes two convex lenses. The light emitted by the light-emitting chip is refracted by the two convex lenses and then exits from the light-emitting port of the light-collecting device. In this embodiment, the light-collecting device is a reflector cup, which includes opposing light-inlet and light-outlet ports, as well as a reflective inner wall between the light-inlet and light-outlet ports. The light-inlet port of the reflector cup covers the light-emitting surface of its corresponding light-emitting chip. At least part of the light emitted by the light-emitting chip is incident on the reflective inner wall of the reflector cup and reflected before exiting from the light-outlet port of the reflector cup. The light-outlet port of the reflector cup is the light-emitting port of the light-collecting device.

[0229] For example in Figure 11 As shown, light 1021 emitted from the light-emitting chip can exit directly from the light outlet of the reflector, while another light ray 1022 is reflected after incident on the inner wall of the reflector. Due to its inherent limitations, the reflector is difficult to collimate (because there is directly emitted light, such as 1021, which cannot be collimated without processing). However, in this embodiment, the light collection array 1002 needs to emit divergent light, and in this case, the reflector can be used as a light collection device. Figure 10b Another difference in the embodiment shown is that the transmission lens 1003 in this embodiment is also a Fresnel lens, which makes the space between the transmission lens 1003 and the angle adjustment lens 1004 larger and makes it easier to place other light processing elements.

[0230] Colored light is a common requirement in stage lighting applications. While color can be achieved by passing white light through color filters, the number of colors that can be achieved is limited by the number of color filters. Ideally, different colored light-emitting chips should be used at the light source end and able to mix well. In another embodiment of this application, as shown in the example... Figure 12a The light-emitting chip shown is composed of four LED sub-chips 1151, 1152, 1153, and 1154, arranged in a grid pattern. In the diagram, R represents red, G represents green, B represents blue, and W represents white. By controlling the different colored LED sub-chips separately, different colors of emitted light spots can be achieved. In practice, the light-emitting chip is composed of at least two LED sub-chips, and these two LED sub-chips emit different colors, thus achieving the purpose of this embodiment. Preferably, when such multi-color LEDs form an array, at least a portion of them... Figure 12bThe arrangement is such that at least two light-emitting chips in the LED array light source include LED sub-chips of the same color, and these two LED sub-chips of the same color are placed in different positions within their respective light-emitting chips. For example, a red LED sub-chip might be located in the upper left corner of the upper left light-emitting chip, in the upper right corner of the upper right light-emitting chip, in the lower left corner of the lower left light-emitting chip, and in the lower right corner of the lower right light-emitting chip. This arrangement is more conducive to the mixing of different colors.

[0231] In practical applications, the light-emitting device provided in this embodiment can be used in conjunction with an angle-adjustable lens. The light-emitting device has the advantages of small size and low cost, and can achieve good optical effects simply by using an angle-adjustable lens at the user end.

[0232] Implementation Method Six

[0233] The difference between this embodiment and the aforementioned embodiments is as follows:

[0234] The luminaire includes the aforementioned light-emitting device, and also includes a patterned aperture 1412 located near the angle-adjusting lens 1404. This patterned aperture 1412 can be located at the front or rear end of the optical path of the angle-adjusting lens 1404 (in this embodiment, a Fresnel lens). Figure 14 (This refers to the case where the patterned aperture is located at the rear end of the optical path of the angle-adjusting lens). The patterned aperture 1412 includes a light-transmitting area 1412a with a pattern. The luminaire also includes a projection lens 1413, which projects the pattern of the light-transmitting area 1412a of the patterned aperture into the far field. The distance between the patterned aperture 1412 and the vertex of the light-emitting surface of the angle-adjusting lens 1404 is less than half of F1, where F1 is the focal length of the transmission lens 1403. As can be seen from the previous embodiments, the angle-adjusting lens can be located at the front end or the rear end of the optical path of the transmission spot, and the distance between the angle-adjusting lens and the transmission spot is generally less than half of F1. In practice, since the transmitted light spot is a small spot in the light path, it has the highest brightness. The pattern stop 1412 is best placed at the position of the transmitted light spot. Therefore, the distance between the pattern stop 1412 and the vertex of the light-emitting surface of the angle adjustment lens 1404 is less than half of F1, which can ensure that the brightness of the light at the pattern stop 1412 is as high as possible. In this way, the brightness of the pattern light projected to the far field through the projection lens 1413 is also as high as possible.

[0235] In this embodiment, a dimming device 1411 is also included, located between the transmission lens 1403 and the angle adjustment lens 1404, for adjusting the color, color temperature, angular distribution, or surface distribution of light. For example, the dimming device 1411 is a CMY filter with a transparent area comprising a colorless transparent area and a colored area, which are mixed together. Within the transparent area, at least two sub-regions have different area ratios for the colorless transparent area and the colored area. This allows for gradient color changes by placing different positions within the transparent area in the light path. Since the dimming device 1411 is located between the transmission lens 1403 and the angle adjustment lens 1404, the projection lens 1413 does not image it, thus naturally achieving color mixing between the colorless transparent area and the colored area within the transparent area. Besides the CMY filter controlling color, the dimming device 1411 can include multiple components to control other optical effects such as angular distribution and surface distribution.

[0236] Implementation Method Seven

[0237] The difference between this embodiment and the aforementioned embodiments is as follows:

[0238] In the following description, the optical axis direction of the light emission direction of the light-emitting device is defined as the Z direction, the direction that makes an angle A with the Z direction is defined as the A direction, and the plane perpendicular to the Z direction is defined as the principal plane. The +Z direction is the direction along the Z direction that is consistent with the light emission direction of the light-emitting device; the -Z direction is the direction along the Z direction that is opposite to the light emission direction of the light-emitting device.

[0239] The light-emitting device includes at least two LED units, which are arranged closely together to form an LED unit array. The LED unit array includes a light-emitting surface. Each LED unit includes a light-emitting chip and multiple reflectors. The light-emitting chip is quadrilateral or hexagonal, and the light-emitting surface of the light-emitting chip is parallel to the main plane. Each side of the light-emitting chip (hereinafter referred to as the LED side) corresponds to a reflector. Multiple reflectors are adjacent to each other to form a unit light channel. The light-emitting surface of the LED unit array is formed by the close arrangement of the unit light channels of at least two LED units.

[0240] The following is in conjunction with the appendix Figure 15a , Figure 15b and Figure 15c Explain the positional relationship between one edge of a corresponding light-emitting chip and a reflective sheet. Figure 15a , Figure 15b and Figure 15c In this design, the light-emitting chip 101 is a quadrilateral. In one embodiment, the light-emitting chip 101 can be a regular quadrilateral, with one side being 101a. The reflective sheet corresponding to the LED side 101a is a reflective sheet 102a. The reflective sheet 102a is in the Z direction ( Figure 15aand Figure 15c The reflector 102a curves along a parabolic trajectory and faces the edge 101a. The reflector 102a is congruent in the direction along the LED edge 101a. In other words, the line segments formed by the intersection of the reflector 102a and any first plane are congruent, i.e., the intersecting line segments are all identical parabolic segments. A plurality of first planes are arranged along the LED edge 101a, each first plane being perpendicular to the LED edge 101a and parallel to the Z direction. The focus of the parabola coincides with the LED edge 101a, and the angle between the axis 141 of the parabola and the Z direction is A. In one embodiment, A < 45 degrees. Observe the three rays 121a, 122a, and 123a emitted from LED edge 101a towards reflector 102a. Since reflector 102a is congruent along the direction of LED edge 101a and the focus of the parabola coincides with LED edge 101a; in other words, reflector 102a is congruent with any intersecting line segment (parabolic segment) on the first plane perpendicular to LED edge 101a, and the focus of the parabolic segment coincides with LED edge 101a. According to the definition of a parabola, these three rays 121a, 122a, and 123a, after being reflected by the reflector, will exit along the axis 141 of the parabola, that is, the angle between the reflected rays 121a, 122a, and 123a and the Z direction is A. It can be determined that all rays emitted from LED edge 101a and incident on reflector 102a will be reflected by reflector 102a and exit along axis 141. Based on this, observe any light-emitting point 101x inside the light-emitting surface of the LED chip that is not on the LED edge 101a. The light ray 122x emitted from light-emitting point 101x and the light ray 122a are incident on the same position on the reflector 102a. According to geometric optics, the angle between the exit direction of light ray 122x after reflection by the reflector and the Z-direction is always less than A. By extension, any light ray emitted from light-emitting point 101x that is incident on the reflector 102a will have an exit direction with an angle less than A after reflection by the reflector 102a. Further extending this, any light ray emitted from any point on the light-emitting surface of the LED chip that is incident on the reflector 102a will have an exit direction with an angle less than or equal to A after reflection by the reflector 102a.

[0241] Any corresponding LED edge and reflector satisfy the above positional relationship. Figure 15b yes Figure 15a The perspective view of the embodiment shown shows that 103 represents the thermally conductive substrate of the LED unit, and the thermally conductive substrate 103 is larger than the light-emitting surface of the light-emitting chip 101. Figure 15c yes Figure 15a The top view of the embodiment shown is in Figure 15c It extends perpendicularly to the paper in the Z-direction. See also Figure 15a , Figure 15b and Figure 15c This explains the positional relationship between the other LED edges and reflectors in the LED unit. LED edge 101b corresponds to reflector 102b, LED edge 101c corresponds to reflector 102c, and LED edge 101d corresponds to reflector 102d. Based on the working principle of LED edge 101a and reflector 102a described above, light rays emitted from any point on the light-emitting surface of the LED chip and incident on reflectors 102a, 102b, 102c, and 102d, respectively, are reflected by these four reflectors 102a, 102b, 102c, and 102d, and the angle between the outgoing direction and the Z-direction is less than or equal to A. Furthermore, since multiple reflectors 102a, 102b, 102c, and 102d are adjacent to each other to form a unit light channel 102 (e.g., ... Figure 15b As shown), the light emitted from the light-emitting chip 101, after being incident on the inner wall of the light channel 102 and reflected, has an angle less than or equal to A between its exit direction and the Z direction. Therefore, for Figure 15a , Figure 15b and Figure 15c In the case of an LED unit shown, by setting the unit light channel 102, the light emitted by the light-emitting chip can be collected by reflection, and the emission angle of the light emitted from the unit light channel 102 can be guaranteed to be less than or equal to A. At the same time, the unit light channel 102 itself has a light homogenizing effect, that is, the light emitted from the light-emitting chip 101 in different directions is reflected by different unit light channels 102 and then overlaps again at the light outlet of the unit light channel 102. Therefore, the light at the light outlet of the unit light channel 102 has a relatively uniform distribution.

[0242] In one embodiment, the light-emitting device includes at least four of the aforementioned LED units, which are arranged closely together to form an LED unit array. The light-emitting surface of the LED unit array is formed by the closely arranged unit light channels of the at least four LED units. For example, nine LED units arranged in a 3x3 configuration are illustrated in the perspective view shown below. Figure 16 As shown in the figure, it can be seen that each LED unit is as follows: Figure 15b As shown. Since the reflectors are congruent along the direction of their corresponding LED edges, the sidewalls of the nine LED units can be closely joined. Because each LED unit can emit light at an angle less than or equal to A, and because the light distribution at the light outlet of each LED unit's light channel is relatively uniform, the light distribution at the outlet of the joined units is also relatively uniform. The contour shape of the joined light-emitting surface depends on the joining method of the multiple LED units, for example, in... Figure 16In the illustrated embodiment, the outline shape of the spliced ​​light-emitting surface is a regular quadrilateral (the dashed line 204 in the figure represents this outline shape). Of course, there is no light at the splicing seam. Since the reflector has a certain thickness, splicing seams between LED units are unavoidable, so absolute uniformity cannot yet be achieved.

[0243] Therefore, in one implementation, such as Figure 17 As shown, it also includes multiple reflective planes 305a, 305b, 305c, and 305d parallel to the Z direction. These multiple reflective planes are adjacent to each other to form a total light channel 305. The cross-sectional shape 304 of the total light channel 305 on the main plane is the same as the outer contour of the light-emitting surface of the LED unit array, which is a regular quadrilateral in this embodiment. In this way, the total light channel 305 is closely connected to the light-emitting surface of the LED unit array and receives the emitted light from the LED unit array. Since the multiple reflecting planes 305a, 305b, 305c, and 305d are parallel to the Z-direction, the total optical channel 305 formed by their adjacent arrangement is also parallel to the Z-direction. When light emitted from the light-emitting surface of the LED unit array enters the optical channel, the portion of the light reflected by the multiple reflecting planes 305a, 305b, 305c, and 305d does not change the overall emission angle; it remains less than or equal to A with respect to the Z-direction. Simultaneously, due to the multiple reflections, the light at the exit of the total optical channel 305 becomes completely uniform, eliminating the dark lines at the seams of the LED unit array's light-emitting surfaces. Finally, since the cross-sectional shape 304 of the total optical channel 305 on the principal plane is the same as the outer contour of the LED unit array's light-emitting surface, the size of the light-emitting surface does not increase, and the light energy density does not decrease.

[0244] In summary, Figure 17 In the embodiment of the light-emitting device shown in this example, a uniform light distribution and an emission angle less than or equal to A are formed at the light outlet of the total light channel 305. Furthermore, compared to conventional light-emitting devices based on compound eye lenses, this device does not use lenses but instead uses inexpensive reflective sheets for light control, thus significantly reducing costs. Moreover, in conventional light-emitting devices based on compound eye lenses, since the lenses are transmissive, as optical knowledge shows, any refraction of light results in dispersion, which is determined by the lens material. However, the reflection occurring on the reflective sheet completely eliminates dispersion, giving the emitted light of this device the advantage of being dispersion-free.

[0245] In one implementation of this embodiment, such as Figure 15a , Figure 15b and Figure 15c The edge of the reflector in the -Z direction is called the lower edge. In at least one pair of LED edges and reflectors, the lower edge of the reflector is in contact with the opposite edge of the corresponding edge. For example, in... Figure 15aIn the middle, edge 101a corresponds to reflector 102a, and the lower edge of reflector 102a is in contact with the opposite edge 101b of edge 101a. The advantage of this is that, without affecting the aforementioned working principle and ensuring that the angle of reflected light is less than or equal to A, the area of ​​the light inlet and light outlet of the unit light channel is minimized, thus maximizing the energy density. Similarly, edge 101b corresponds to reflector 102b, and the lower edge of reflector 102b is in contact with the opposite edge 101a of edge 101b; edge 101c corresponds to reflector 102c, and the lower edge of reflector 102c is in contact with the opposite edge 101d of edge 101c; edge 101d corresponds to reflector 102d, and the lower edge of reflector 102d is in contact with the opposite edge 101c of edge 101d. That is, the lower edge of each reflector in the unit light channel is in contact with the opposite edge of its corresponding edge. In this way, the light inlet of the entire unit light channel is close to the light-emitting surface of the unit, maximizing energy density and ensuring the best uniformity of the light outlet. Of course, even if the lower edge of the reflector does not contact the opposite edge of the corresponding LED edge, i.e., there is a gap between them, it does not affect the working principle and beneficial effects of the reflector described above.

[0246] In one implementation of this embodiment, such as Figure 15a , Figure 15b and Figure 15cAs shown in the figure, the edge of the reflector in the +Z direction is called the upper edge. In at least one pair of LED edges and reflectors, the angle between the line connecting the LED edge to the upper edge of the reflector and the Z direction is A. For example, if LED edge 101a corresponds to reflector 102a, the angle between the line 142 connecting LED edge 101a to the upper edge of reflector 102a and the Z direction is A. This effectively defines the height of reflector 102a in the Z direction. As mentioned earlier, the angle between the light emitted from the LED chip and the reflector 102a after reflection by the reflector 102a is less than or equal to A. The angle between the line 142 connecting the LED edge 101a to the upper edge of the reflector 102a and the Z direction is A. This ensures that all the light emitted from the LED edge 101a, all the light with an angle less than or equal to A with the Z direction, can be emitted directly. The remaining light with an angle greater than A with the Z direction, after being reflected by the reflector 102a, has an emission angle less than or equal to A. Thus, all the light emitted from the LED edge 101a, regardless of whether it is incident on the reflector 102a, has an emission angle with an angle less than or equal to A with the Z direction. Consider any point 101x on the light-emitting chip. The angle between the line connecting point 101x and the upper edge of the reflector 102a and the Z-direction is less than A. Therefore, the light emitted from any point on the light-emitting chip, regardless of whether it is incident on the reflector 102a, will have an exit angle with an angle less than or equal to A with the Z-direction. In this way, the angles of all light emitted from the light-emitting chip are completely controlled, meaning they are entirely within an angle range less than or equal to A. This simplifies the design of the rear-end lens (or, in other words, the lens design corresponding to the light exit direction) and increases efficiency. Of course, even if the angle between the line connecting the LED edge to the upper edge of the corresponding reflector and the Z-direction is greater than or less than A, it does not affect the working principle and beneficial effects of the reflector. Since A is less than 45 degrees, the half-angle of light collection in the rear-end optical system (or, in other words, the optical system corresponding to the light exit direction) only needs to be less than 45 degrees, which is advantageous and cost-effective for optical system design.

[0247] In one implementation of this embodiment, at least one reflective plane 305a, 305b, 305c, or 305d is integrally formed with a reflective sheet closely connected thereto. In this way, at least in this local area, the total light channel is closely connected with the light-emitting surface of the LED unit array without gaps, thereby improving the light transmission efficiency and the uniformity of light emission.

[0248] Figure 18a This indicates that Figure 17 The diagram shows a light-emitting device used in the optical path structure of a stage lamp. The stage lamp includes a light-emitting device 451, which is as shown in the diagram. Figure 17The stage light, as shown, includes a patterned aperture 452 and projection lens groups 453 and 454. In practical applications, sometimes a single projection lens can achieve the function of a projection lens group; the term "projection lens" refers to both a single projection lens and a multi-lens projection lens group. The patterned aperture 452 is located in the main light channel 405 of the light-emitting device 451 (i.e.,...). Figure 17 Behind the optical path of the total optical channel 305 (that is, according to the light output direction (+Z direction) of the optical path, the light-emitting device 451 and the pattern aperture 452 are arranged sequentially), the focal plane of the projection lens coincides with the plane where the pattern aperture 452 is located. In this way, the light emitted by the light-emitting device 451 can illuminate the pattern on the pattern aperture 452. Since the light output port of the total optical channel of the light-emitting device 451 has a uniform light distribution, and the angle of the emitted light is less than or equal to A, this is equivalent to the pattern on the pattern aperture having a uniform light distribution, and emitting light with an angle less than or equal to A (i.e., the full angular range of the emitted light is less than or equal to 2A). Since the focal plane of the projection lens coincides with the plane where the pattern aperture 452 is located, the pattern of the pattern aperture can be projected to a distance by the projection lens to form a uniform pattern light spot. Since the angle of the light emitted from the pattern is less than or equal to A, the light receiving angle of the projection lens only needs to be less than or equal to A, so it is relatively easy to design and implement.

[0249] Figure 18b yes Figure 18a The embodiment shows a side view of the light-emitting device 451 and the patterned aperture 452 viewed from the right side (i.e., from the -Z direction or the direction of the backlight path). For example... Figure 18b As shown, in this embodiment, the patterned aperture 452 can also serve as a reflective aperture 452 covering the light outlet of the main light channel 405. The reflective aperture 452 is divided into a reflective area 452b and a light-transmitting area 452a. The side of the reflective area 452b facing the main light channel 405 is reflective. Of the light emitted from the light outlet of the main light channel 405, the portion that enters the light-transmitting area 452a can pass through the reflective aperture 452 and be emitted, while the portion that enters the reflective area 452b is reflected by the reflective area and at least partially returns to the main light channel 405 and propagates inward. This reflected light passes through the main optical channel and the unit optical channel and finally strikes the surface of the light-emitting chip. Since the light-emitting chip itself is reflective, this light will be reflected again by the light-emitting chip, which is equivalent to it being emitted again from the light-emitting chip and finally exiting from the light outlet of the main optical channel. Most of it is emitted from the light-transmitting area 452a. Therefore, the reflected light from the reflective area 452b is not wasted, but most of it can be reused, which is equivalent to this part of the light being recycled. Figure 18c This explains the mechanism of light recycling. Figure 18cIn this process, the emitted light 421 is reflected by the reflective area of ​​the reflective aperture 452 and finally incident on the light-emitting chip 401, and then emitted again from the light-emitting chip 401 to form the emitted light 422. This light recovery mechanism can reduce energy loss and improve efficiency while forming patterned light. In this embodiment, the light-transmitting area is circular, but it can also be other shapes, which can be achieved according to actual needs. In practical applications, the reflective aperture can also be independent of the patterned aperture, or even both the patterned aperture and the reflective aperture can be used simultaneously. For example, a reflective aperture covering the light outlet of the main light channel can be used to form a circular light outlet shape, while a rotatable patterned aperture located at the rear end of the reflective aperture's optical path can be used. That is, the light-emitting device, the reflective aperture, and the patterned aperture are arranged sequentially according to the light output direction (+Z direction) of the optical path. The patterned aperture has multiple patterns along the circumference, and the patterns can be switched as the patterned aperture rotates.

[0250] In the foregoing embodiments, LED units are arranged closely together to form an LED unit array. Adjacent LED units inevitably have closely contacting reflective sheets. As mentioned earlier, since the reflective sheets themselves have thickness, the seams between adjacent LED units do not emit light, thus disrupting the uniformity of the light-emitting surface of the LED unit array. In the foregoing embodiments, a reflective plane and a total light path composed of the reflective plane are used to solve this non-uniformity problem; however, this comes at the cost of increasing the height of the light-emitting device. The following embodiments will optimize this problem.

[0251] A schematic diagram of the light-emitting device of another embodiment is shown below. Figure 19b As shown, its enlarged partial view is as follows: Figure 19a As shown. This embodiment and Figure 17The illustrated embodiment differs in two ways. First, in this embodiment, the edge of the reflector in the +Z direction is called the upper edge; it also includes a reflective tip 507, which is located at and covers the upper edge seam of the two reflectors 502a and 506a of two adjacent LED units (in other words, the reflective tip 507 is located at and covers the upper edge seam of the two reflectors, where the two reflectors (see 502a and 506a in the figure) are the two closest reflectors on two adjacent LED units, and the upper edges of the two reflectors are parallel to each other). The side of the reflective tip 507 that contacts the upper edge seam of the reflector is called the wide end 507a, and the other end of the reflective tip 507 is called the tip 507b. The tip 507b is located in the +Z direction of the wide end 507a, and the width of the tip 507b is smaller than that of the wide end 507a. The surface of the reflective tip 507 between the tip and the wide end is reflective. This can be understood as the reflective surface of the reflective tip 507 being a continuation of the reflective surfaces of the two reflective sheets 502a and 506a. This effectively and significantly reduces the width of the slit, thereby greatly reducing the total length of the optical channel. Secondly, this embodiment uses 25 LED units, which are arranged closely in a 5x5 pattern to form an LED unit array.

[0252] In the foregoing embodiments, quadrilateral light-emitting chips were used as examples. However, hexagonal light-emitting chips can also be used. A schematic diagram of an LED unit using a hexagonal light-emitting chip and its reflector is shown below. Figure 20a As shown, it can be understood that six reflective sheets, each corresponding one-to-one with one of the six sides of the light-emitting chip, form a unit light channel, and the light-emitting surface of this unit light channel is also hexagonal. In the light-emitting device of this embodiment, seven LED units are included. These seven LED units are arranged in a honeycomb pattern to form an LED unit array, and the light-emitting surface of this LED unit array is also honeycomb-shaped, as shown below. Figure 20b As shown. Figure 20b In the illustrated embodiment, the total optical path is not shown. Compared to the aforementioned quadrilateral light-emitting surface, this honeycomb-shaped light-emitting surface is closer to a circle, so if the most commonly used circular patterned aperture is used to form a circular patterned light, the light loss is smaller and the efficiency is higher.

[0253] Different LED unit arrangements, besides Figure 17 The illustrated embodiment shows a square array arrangement and Figure 20b The honeycomb arrangement shown can be replaced with other arrangements in practice. These will be explained in the following examples.

[0254] In another embodiment, a schematic diagram of the light-emitting device is shown below. Figure 21As shown. Unlike the previous embodiments, the light-emitting device in this embodiment includes at least three LED units, which are arranged closely and linearly to form an LED linear array; the LED linear array includes a light-emitting surface. Each LED unit includes a light-emitting chip and multiple reflective sheets. The light-emitting chip is quadrilateral, and the light-emitting surface of the light-emitting chip is parallel to the main plane. Each side of the light-emitting chip corresponds to a reflective sheet. Multiple reflective sheets are adjacent to each other to form a unit light channel. The light-emitting surface of the LED linear array is formed by the close linear arrangement of the unit light channels of at least three LED units. Specifically, this embodiment includes six LED units 751, 752, 753, 754, 755, and 756, which are arranged closely and linearly in sequence. These LED units also include four reflective planes parallel to the Z direction ( Figure 21 (Not shown in the drawing), the four reflective planes are adjacent to each other to form a total light channel. The cross-sectional shape of the total light channel on the main plane is the same as the shape of the light-emitting surface of the LED linear array, and both are rectangular, so that the total light channel is closely connected to the light-emitting surface of the LED linear array and receives the emitted light from the LED linear array; the light outlet of the total light channel is rectangular.

[0255] Unlike the previous embodiments, the light-emitting surface of the light-emitting device in this embodiment is elongated, an effect that cannot be achieved by traditional compound-eye lens-based light-emitting devices described in the background section. A schematic diagram of the optical path structure of this light-emitting device applied to a stage lamp in an actual system is shown below. Figure 22 As shown. The stage light also includes projection lens groups 852 and 853, used to project the strip-shaped light outlet of the light-emitting device into the far field to form a strip-shaped high-brightness light spot. This is a requirement in the practical application of stage lights. In traditional technology, this requirement can only be met by using lasers. The light-emitting device in any embodiment can use LED light sources (such as light-emitting chips), which have the characteristics of uniform light output, lower cost, and better eye safety. The longer the strip-shaped light spot required, the better. This requires the more LED units, and the longer the long side of the total light channel 805 of the light-emitting device 851, the better. However, due to the aberration problem of the imaging lens, if the long side of the light outlet of the total light channel 805 is straight, then its edge cannot be well imaged by the projection lens group. To solve this problem, in this embodiment, the length of the reflective plane that makes up the total light channel in the Z direction is called its height. The height Hc of the middle of the two reflective planes of the two long sides of the rectangle forming the light outlet of the total light channel is less than the height He at its two ends. The light-emitting surface of the total light channel can thus be set to be rectangular or elliptical. The advantage of this is that as long as the focal point of the projection lens group on its central axis coincides with the middle of the long side of the light outlet of the main light channel of the light-emitting device, the middle and edge of the long side of the light outlet of the main light channel can be clearly imaged by the projection lens group.

[0256] use Figure 22 The stage light of the illustrated embodiment can form a bright, uniform strip of light in the far field. However, due to limitations in its principle, it can only be a single color. In practical applications, there is a need for multi-color switchable strip of light. Therefore, in one implementation, the stage light includes at least two such... Figure 21 The light-emitting device ( Figure 21 (The total optical path is not shown in the diagram). The two light-emitting devices are placed side by side along the short side of the light outlet of their total optical path; the two light-emitting devices emit different colors or emit white light with different color temperatures. These two light-emitting devices form two uniform strip-shaped light bands in the far field using the same projection lens group, such as... Figure 23 As shown in 981 and 982, the two uniform light strips are arranged side-by-side along their shorter sides. These two light strips have different colors or different color temperatures, which allows different light-emitting devices to be lit in stage lighting to achieve different colors or color temperatures as needed.

[0257] In the aforementioned embodiments, the light emitted by the light-emitting device is divergent, and the light outlet of the device is the location with the most uniform light distribution and the highest light energy density. This presents a problem: the distance between the light-emitting device and the projection lens (group) is relatively small, thus limiting the expansion of stage lighting functions. For example, stage lighting requires many lighting effects, which rely on optical components between the light-emitting device and the projection lens (group), such as prisms, color filters, etc. These components themselves require mechanical actions such as rotation and switching to operate, thus requiring a relatively large physical space.

[0258] To address this issue, an embodiment is proposed, the structural diagram of which is shown below. Figure 24a As shown. In this embodiment, at least four LED units are arranged closely together to form an LED unit array 1011. The LED unit array 1011 includes a light-emitting surface. Each LED unit includes a light-emitting chip and multiple reflectors. The light-emitting chip is quadrilateral or hexagonal, and its light-emitting surface is parallel to the main plane. Each side of the light-emitting chip corresponds to one reflector. Multiple reflectors are adjacent to each other to form a unit light channel. The light-emitting surface of the LED unit array is formed by the close arrangement of the unit light channels of at least four LED units. In any correspondence between a side of the light-emitting chip and a reflector, the reflector is curved in the Z direction with a parabolic trajectory and faces the LED side. The reflectors are congruent in the direction along the LED side; wherein the focus of the parabola coincides with the LED side, and the angle between the axis of the parabola and the Z direction is α. Figure 17 The differences in the illustrated embodiments include three points.

[0259] First, the light-emitting device in this embodiment also includes a transmission lens 1012 located at the rear end of the optical path of the LED unit array 1011 (i.e., the LED unit array 1011 and the transmission lens 1012 are arranged sequentially along the +Z direction). The transmission lens 1012 is used to receive the light emitted from the light-emitting surface of the LED unit array 1011 (taking light ray 1021 as an example) and converge it onto a second plane, that is, a plane located at the rear end of the optical path of the transmission lens 1012 (which can be called the P-plane); in other words, the light emitted from the light-emitting surface of the LED unit array 1011 (taking light ray 1021 as an example) converges onto the second plane after passing through the transmission lens 1012. According to the above... Figure 15a The working principle of the reflector and LED unit is explained as follows: the light emitted from LED edge 101a is reflected by reflector 102a and becomes light emitted along direction A (here, direction A refers to the direction of light emitted from the LED edge 101a). Figure 15a The light emitted from LED edge 101b, deviating to the right from angle A in the +Z direction (see direction A 152 in the diagram), is entirely reflected by reflector 102b and becomes light emitted in direction A (here, direction A refers to...). Figure 15a The light emitted from any point 101x on the light-emitting chip, whether incident on reflector 102a or 102b, is essentially emitted from a point off the focal point of the parabola. Therefore, most of the reflected light is concentrated around a specific angle smaller than A. This indicates that the unit light channel transforms the surface distribution of the light-emitting chip into an angular distribution of the emitted light. Since the surface distribution of the light-emitting chip is essentially uniform, the angular distribution of the light emitted from the unit light channel is also essentially uniform. In summary, the surface and angular distributions of the light emitted from the unit light channel are both essentially uniform, a result of the combined characteristics of the light-emitting chip and the unit light channel.

[0260] The following is combined Figure 24b The working principle of the transmission lens is explained. To describe the angle of light incident on the transmission lens 1012, in... Figure 24b In the design, a certain distance is intentionally placed between the LED unit array 1011 and the conductive lens; in reality, this distance may not exist. Consider a beam of light 1022 emitted from the edge of the LED unit array, which has a certain divergence angle A and is incident on 1012. Figure 24bThree rays are used to represent the different angles of beam 1022. The guiding lens 1012 has the same bending ability for any ray; that is, the three rays of beam 1022 have the same twist angle after passing through the guiding lens 1012. Therefore, when incident on the P-plane, a light spot 1024 of a certain width is formed. The upper edge of the light spot 1024 corresponds to the ray at the uppermost angle of beam 1022, the lower edge of the light spot 1024 corresponds to the ray at the lowermost angle of beam 1022, and the center of the light spot 1024 corresponds to the ray at the center angle of beam 1022. Thus, the angular distribution of beam 1022 becomes a planar distribution on the P-plane after passing through the guiding lens 1012. Next, consider beam 1023 emitted from a position near the center of the LED unit array. Similar to beam 1022, beam 1023 also forms a light spot on the P-plane that coincides with light spot 1024 after passing through the guiding lens 1012. The planar distribution of this light spot is also equivalent to the angular distribution of beam 1023. Therefore, the function of the transmission lens 1012 is to convert the surface distribution of light emitted from the light-emitting surface of the LED unit array into the angular distribution of the converging light, and at the same time convert the angular distribution of light emitted from the light-emitting surface of the LED unit array into the surface distribution on the P-plane.

[0261] Since the angular distribution of the emitted light from each LED unit is basically uniform, the converged beam formed on the P-surface after being converged by the transmission lens 1012 is also basically uniform. At the same time, the converged beam begins to diverge after passing through the P-surface, and the divergence angle is determined by the surface shape of the transmission lens 1012. Therefore, different ranges of divergence angles can be achieved as needed.

[0262] Second, this embodiment may not necessarily include Figure 17 The total optical channel in the illustrated embodiment. Because... Figure 17 In the illustrated embodiment, the purpose of setting up the main light channel is to eliminate the influence of the seams between LED units (i.e., the dark lines caused by the lack of light emission at the seams), thereby achieving a uniform surface distribution on the light-emitting surface of the main light channel. However, as mentioned above, in this embodiment, the light energy distribution on the P-plane is not affected by the seams between LED units, but is determined by the angular distribution of the LED units' emission. Therefore, a main light channel is not necessarily required in this embodiment. Of course, using a main light channel can improve the surface uniformity of the light-emitting surface of the LED unit array, thereby improving the angular distribution uniformity of the converged light, which also helps with the light emission quality of stage lights. Therefore, it may be used in practical applications.

[0263] Third, in this embodiment, the included angle A is less than 45 degrees. In one embodiment, it is recommended to set the included angle A to less than 20 degrees. This is because, in order to achieve a good light-converging effect of the transmission lens, the divergence angle of the incident light must be relatively small. Through repeated practice, it has been concluded that A less than 20 degrees is a better range in practice and can achieve good results.

[0264] In one embodiment, the light-emitting device further includes a plurality of reflective planes parallel to the Z-direction located between the LED light source array 1011 and the optical path of the conductive lens 1012. These plurality of reflective planes are adjacent to each other to form a total optical channel (not shown in the figure, but can be referred to the foregoing embodiments and corresponding figures, such as...). Figure 17 , Figure 18c , Figure 22 (etc.), the cross-sectional shape of the total light channel on the main plane is the same as the outer contour of the light-emitting surface of the LED unit array 1011, so that the total light channel is closely connected to the light-emitting surface of the LED unit array 1011 and receives the emitted light of the LED unit array 1011.

[0265] In summary, on the P-plane of this embodiment, a uniform surface distribution of light is formed, while also having a certain degree of controllable angular distribution. Figure 25a This indicates the application. Figure 24a The diagram illustrates the optical path of a stage light made from a light-emitting device, including a light-emitting device 1119, a patterned aperture 1156, and projection lenses 1153 and 1154. The patterned aperture 1156 is located near the P-plane of the light-emitting device 1119 (i.e., the patterned aperture 1156 is close to the P-plane of the light-emitting device). The focal plane of the projection lens group coincides with the plane where the patterned aperture 1156 is located. The uniform light spot formed by the light-emitting device 1119 on the P-plane illuminates the patterned aperture and is projected onto the pattern of the patterned aperture before exiting. This is equivalent to emitting uniform light with a certain angle range from the pattern of the patterned aperture. This pattern is projected into the far field by the projection lens group to form patterned light.

[0266] Figure 25a The light source 1119 and Figure 24a The difference in the light source shown is that, Figure 25a The light-emitting device 1119 also includes a reflective aperture 1109 covering the light-emitting surface of the LED unit array 1101. A side view of the LED unit array 1101 and the reflective aperture 1109 viewed along the -Z direction is shown below. Figure 24bAs shown, the reflective aperture 1109 is divided into a reflective area 1109b and a light-transmitting area 1109a. The side of the reflective area 1109b facing the LED unit array 1101 is reflective. Of the light emitted from the light-emitting surface of the LED unit array, the portion incident on the light-transmitting area 1109a can pass through the reflective aperture and exit, while the portion incident on the reflective area 1109b is reflected by the reflective area and at least partially returns to the interior of the LED unit array. This reflected light will be re-emitted from the light-transmitting area 1109a after light recovery, a principle that has been explained previously and will not be repeated here. In one implementation, the light-transmitting area 1109a is circular, and the diameter of this circle is less than or equal to the aperture of the transmission lens 1119. Because projection lenses 1153 and 1154 generally use a circular shape, the angle range of the received light is also a circular light cone. As mentioned earlier, the angular distribution of the light-emitting device 1119 is equivalent to the surface distribution of the light-emitting surface of the LED unit array. In this embodiment, the outline of this surface distribution is quadrilateral. Therefore, the light-emitting angular distribution of the light-emitting device 1119 should also be a square pyramid-shaped light cone. When this light cone is incident on the circular projection lens, the light at its four corners will be wasted. Therefore, in this embodiment, the light from the light-emitting port of the LED unit array 1101 is made circular by using the reflective aperture 1109. The reflected light is reused due to light recovery, and the final emitted light is efficiently incident on the projection lens. This is equivalent to the light that was originally wasted at the four corners now being partially utilized through light recovery by placing the reflective aperture 1109, thereby improving efficiency. Of course, the light-transmitting area of ​​the reflective aperture 1109 does not have to be circular; this can be designed according to the actual situation.

[0267] In this embodiment, the patterned aperture 1156 has multiple patterns distributed along its circumference and also includes a motor, which can control the position of the patterned aperture in the optical path, thereby controlling which pattern on the patterned aperture is projected into the far field to form patterned light.

[0268] In another embodiment, the light-emitting device includes at least four LED units, wherein at least one of the at least four LED units is a first LED unit whose emitted light color is different from that of the other LED units; or at least one of the at least four LED units is a second LED unit whose emitted white light has a different color temperature than that of the other LED units. (Reference) Figure 24bThe explanation states that light from different LED units forms a spot on the P-plane after passing through the transmission lens. Theoretically, the spots formed by different LED units overlap. Therefore, even if different LED units have different colors or color temperatures, they will mix on the P-plane to form a uniform mixed spot. The advantage of this is that the brightness of different LED units can be controlled by controlling their driving current, thereby changing the color or color temperature of the light. Alternatively, the color of the emitted light can be controlled by turning different LED units on or off.

[0269] In summary, a light-emitting device includes at least two LED units arranged closely together to form an LED unit array. The LED unit array includes a light-emitting surface. Each LED unit includes a light-emitting chip and multiple reflective sheets. The light-emitting chip is quadrilateral or hexagonal, with its light-emitting surface parallel to the main plane. Each side of the light-emitting chip corresponds one-to-one with a reflective sheet. Multiple reflective sheets are adjacent to each other to form a unit light channel. The light-emitting surface of the LED unit array is formed by the close arrangement of the unit light channels of the at least two LED units. In the correspondence between any side of the light-emitting chip and a reflective sheet, the reflective sheet curves along a parabolic trajectory in the Z direction and faces the LED side. The reflective sheets are congruent along the direction of the LED side (in other words, the line segments obtained by the reflective sheet intersecting any first plane are congruent, and multiple first planes are arranged along the LED side, each first plane being perpendicular to the LED side and parallel to the Z direction). The focus of the parabola coincides with the LED side, and the angle between the axis of the parabola and the Z direction is A, where A < 45 degrees.

[0270] In one embodiment, the light-emitting device includes at least four LED units and a plurality of reflective planes parallel to the Z direction. The plurality of reflective planes are adjacent to each other to form a total light channel. The cross-sectional shape of the total light channel on the main plane is the same as the outer contour of the light-emitting surface of the LED unit array, so that the total light channel is closely connected to the light-emitting surface of the LED unit array and receives the emitted light from the LED unit array.

[0271] Implementation Method Eight

[0272] The difference between this embodiment and the aforementioned embodiments is as follows:

[0273] Reference Figure 26 In this embodiment, three LED array light sources 1501a, 1501b, and 1501c and corresponding three light collection device arrays 1502a, 1502b, and 1502c are used.

[0274] The three LED array light sources have different colors. For example, LED array light source 1501a uses a red light-emitting chip (and may also include, but is not limited to, orange or amber light-emitting chips), LED array light source 1501b uses a green light-emitting chip (and may also include, but is not limited to, yellow-green or yellow light-emitting chips), and LED array light source 1501c uses a blue light-emitting chip (and may also include, but is not limited to, purple or blue-green light-emitting chips).

[0275] The light emitted by the three LED array light sources is collected by their respective light-collecting arrays before being emitted. It also includes beam-splitting filters 1591 and 1592. The function of the beam-splitting filters is to reflect light of a certain wavelength while transmitting light of other wavelengths. The wavelengths of the reflected and transmitted light can be set during the design of the beam-splitting filters. By using beam-splitting filters, different colors of light can be coupled together for emission, thus multiplexing the same optical path for different colors of light, thereby increasing brightness.

[0276] Specifically, in this embodiment, for example, the beam splitter filter 1591 can transmit the light emitted by the LED array light source 1501a and the LED array light source 1501c, while reflecting the light emitted by the LED array light source 1501b. The beam splitter filter 1592 can transmit the light emitted by the LED array light source 1501a and the LED array light source 1501b, while reflecting the light emitted by the LED array light source 1501c. In this way, the beam splitters 1591 and 1592, through their cross-directional arrangement, can simultaneously guide the light 1581a emitted by the LED array light source 1501a, the light 1581b emitted by the LED array light source 1501b, and the light 1581c emitted by the LED array light source 1501c to be combined into a single beam and emitted to the guide lens 1503 and then emitted.

[0277] A lamp includes the aforementioned light-emitting device, and further includes a patterned aperture and a projection lens. The patterned aperture is located behind the optical path of the main optical channel of the light-emitting device, and the focal plane of the projection lens coincides with the plane where the patterned aperture is located.

[0278] In one embodiment, the light-emitting device includes at least three LED units arranged closely and linearly to form an LED linear array; the LED linear array includes a light-emitting surface; wherein the light-emitting chip is quadrilateral; the light-emitting device also includes four reflective planes parallel to the Z direction, the four reflective planes being adjacent to each other to form a total light channel, the cross-sectional shape of the total light channel on the main plane being the same as the shape of the light-emitting surface of the LED linear array and both being rectangular, such that the total light channel is closely connected to the light-emitting surface of the LED linear array and receives the emitted light from the LED linear array; the light-emitting port of the total light channel is rectangular; the length of the reflective plane in the Z direction is called its height, and the height of the middle part of the two reflective planes on the two long sides of the rectangle forming the light-emitting port of the total light channel is less than the height of its two ends.

[0279] A lighting fixture includes the aforementioned light-emitting device and a projection lens, wherein the focal point of the projection lens on its central axis coincides with the midpoint of the long side of the light outlet of the total light channel of the light-emitting device. In one embodiment, the lighting fixture includes at least two light-emitting devices as described in the third aspect, the two light-emitting devices being arranged side-by-side along the short side of the light outlet of their total light channel; the two light-emitting devices emit different colors or emit white light with different color temperatures.

[0280] In one embodiment, the light-emitting device includes at least four LED units and a conductive lens located at the rear end of the optical path of the LED unit array (i.e., the LED unit array and the conductive lens are arranged sequentially along the +Z direction). The conductive lens is used to receive light emitted from the light-emitting surface of the LED unit array and converge it onto a second plane.

[0281] A lamp includes the aforementioned light-emitting device, and further includes a patterned aperture and a projection lens, wherein the patterned aperture is close to a second plane of the light-emitting device, and the focal plane of the projection lens coincides with the plane on which the patterned aperture is located.

[0282] In the description of this application, it should be understood that the terms “comprising” and “having” as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are expressly listed, but may include other steps or units that are not expressly listed or that are inherent to such process, method, product, or apparatus.

[0283] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such 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

1. An LED light emitting device, characterized by, include: LED array light source, comprising multiple light-emitting chips; An array of light collection devices includes multiple light collection devices, each corresponding to a light-emitting chip. The light collection device is used to collect the light emitted by the corresponding light-emitting chip and to emit the light through the light outlet of the light collection device. The radius of the inscribed circle of the light-collecting device's light-emitting port is less than or equal to five times the radius of the inscribed circle of the corresponding light-emitting chip's light-emitting surface; A conductive lens is provided, which can acquire the emitted light from the light outlet of the plurality of light collecting devices and deflect the emitted light from the light outlet of the light collecting devices.

2. The LED light emitting device of claim 1, wherein, The circumcircle diameter of the smallest light spot formed at the rear end of the transmission lens is greater than or equal to 0.4 times the circumcircle diameter of the LED array light source.

3. The LED light emitting device of claim 1, wherein The light collection device includes at least two convex lenses. The light emitted by the light-emitting chip is refracted by the at least two convex lenses and then emitted from the light outlet of the light collection device. Alternatively, the light collecting device includes a reflector cup having opposing light inlets and light outlets, and a reflective inner wall located between the light inlets and the light outlets; The light inlet of the reflector cup covers the light-emitting surface of the corresponding light-emitting chip. At least part of the light emitted by the light-emitting chip is incident on the reflective inner wall of the reflector cup and reflected before exiting from the light outlet of the reflector cup. The light outlet of the reflector cup is the light outlet of the light collecting device.

4. The LED light emitting device of claim 1, wherein The radius of the inscribed circle of the light-collecting device's light-emitting port is greater than or equal to 1.5 times the radius of the inscribed circle of the corresponding light-emitting chip's light-emitting surface.

5. The LED light emitting device of claim 4, wherein, The radius of the inscribed circle of the light-emitting port of the light-collecting device is greater than or equal to 2.5 times the radius of the inscribed circle of the corresponding light-emitting surface of the light-emitting chip, and less than or equal to 4 times the radius of the inscribed circle of the corresponding light-emitting surface of the light-emitting chip.

6. The LED light emitting device of claim 1, wherein, The conductive lens receives light emitted from the light collecting device array. The diameter of the circumcircle of the light spot area incident on the surface of the conductive lens is greater than or equal to 0.4 times the focal length of the conductive lens and less than or equal to 2 times the focal length of the conductive lens.

7. The LED light emitting device of claim 6, wherein, The conductive lens receives light emitted from the light collecting device array. The diameter of the circumcircle of the light spot area incident on the surface of the conductive lens is greater than or equal to 0.6 times the focal length of the conductive lens and less than or equal to 1.2 times the focal length of the conductive lens.

8. The LED light emitting device of claim 1, wherein, The LED light-emitting device is configured as follows: ； Wherein, R is the inscribed circle radius of the light outlet of the light collection device, r is the inscribed circle radius of the light-emitting surface of the light-emitting chip corresponding to the light collection device; D1 is the circumscribed circle diameter of the light spot range incident on the surface of the conductive lens, and F1 is the focal length of the conductive lens.

9. The LED light emitting device of claim 1, wherein, The LED light-emitting device includes a first compound eye lens and a second compound eye lens arranged sequentially along the optical path between the light-collecting device array and the conducting lens; The first compound eye lens includes a plurality of first convex lenses arranged closely together, and the second compound eye lens includes a plurality of second convex lenses arranged closely together; The first compound eye lens and the second compound eye lens are provided separately; or, the first compound eye lens and the second compound eye lens are integrally formed to form a compound eye lens body.

10. The LED light emitting device of claim 1, wherein, The light-emitting surface of the light-emitting chip is circular.

11. The LED light emitting device of any of claims 1-10, wherein, It includes a first LED array light source and a corresponding light collection device array, and a second LED array light source and a corresponding light collection device array; the first LED array light source and the second LED array light source emit different colors; It also includes a beam splitter filter, which can transmit light emitted by the first LED array light source and reflect light emitted by the second LED array light source. The light emitted by the first LED array light source is collected by the corresponding light collection device array and then emitted and transmitted through the beam splitter filter to form a first emitted light. The light emitted by the second LED array light source is collected by the corresponding light collection device array and then emitted and reflected by the beam splitter filter to form a second emitted light. The first emitted light and the second emitted light are combined into a beam and then incident on the transmission lens.

12. The LED light emitting device of any of claims 1-10, wherein, The light-emitting chip includes at least two sub-chips, and the light-emitting colors of the at least two sub-chips are different. In the LED array light source, among at least two light-emitting chips, the sub-chips that emit the same color are placed in different orientations within their respective light-emitting chips.

13. An LED light emitting system, characterized by, Includes an LED light-emitting device as described in any one of claims 1-12, and an angle-adjusting lens that receives light emitted from the transmission lens.

14. The LED light emitting system of claim 13, wherein, The distance from the vertex of the light-emitting surface of the transmission lens to the vertex of the light-incident surface of the angle-adjusting lens is less than or equal to 1.5 times the focal length of the transmission lens.

15. The LED lighting system of claim 13, wherein, The distance from the vertex of the light-emitting surface of the transmission lens to the vertex of the light-incident surface of the angle-adjusting lens is greater than or equal to the distance from the vertex of the light-emitting surface of the angle-adjusting lens to the minimum position of the light spot at the rear end of the optical path of the angle-adjusting lens.

16. The LED lighting system of claim 13, wherein, The focal length of the angle-adjusting lens is greater than or equal to 0.5 times the focal length of the transmission lens, and less than or equal to 1.5 times the focal length of the transmission lens.

17. A remotely illuminated LED luminaire, characterized by Includes the LED light-emitting system as described in any one of claims 13-16, and a patterned aperture located near the angle-adjusting lens, the patterned aperture including a light-transmitting area having a pattern; The LED luminaire for remote lighting also includes a projection lens, which is located at the rear end of the optical path of the pattern aperture and is used to project the pattern of the light-transmitting area of ​​the pattern aperture into the far field.

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