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

Abstract

The invention 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 LED lamps for remote lighting, and particularly to LED light-emitting devices, LED light-emitting systems, and LED lamps for remote lighting. Background Art

[0002] In the field of remote lighting, such as in scenarios like searchlights, ship lights, stage lights, etc., it is desired to achieve a remote, uniform lighting effect. Taking stage lighting as an example, stage lighting is an essential part of live performances such as plays, concerts, dances, and concerts. Stage lights are used to provide diverse, colorful, and dynamic lighting presentations. Different stage lighting designs can be carried out according to the artistic effects and on-site conditions of the live performance.

[0003] Specifically, the principle of achieving stage lighting effects in the stage lighting scenario is to use a light source device to form a light spot, and based on the formed light spot, the stage lighting can be further presented. For example, some hollow-out patterns, such as circles, stars, etc., can be set near the light spot according to the stage lighting requirements. When the hollow-out pattern is illuminated by the light spot, a projection lens is used to image the pattern to a distance, thus forming the stage lighting effect. That is to say, the display effect of stage lighting is usually affected by the quality of the light spot.

[0004] In the field of stage lighting, using an array light source to form a converging light spot has a relatively mature solution, such as the solutions described in the patent documents with publication numbers CN103968268 and CN209101217. As an example, Figure 1 FIG. 3 is a schematic structural diagram of a light-emitting device in the related art. Specifically, FIG. 3 is FIG. 3 in the patent document of CN209101217. In this article, FIG. 3 in this document is taken as an example to illustrate the solution of the light-emitting device in the related art. As shown in FIG. 3, a traditional light-emitting device includes an LED (i.e., light-emitting diode) array, a collimating lens array, a fly-eye lens group, and a converging lens, so as to form a converging light spot. Specifically, above the LED array are the collimating lens arrays 11 and 12. The light emitted by the LED array forms collimated light after being collected and collimated by the collimating lens arrays 11 and 12, and this collimated light forms a light spot at the focal position of the converging lens 4 after the converging effect of the converging lens 4.

[0005] In this solution, the optical system needs to collimate the light emitted by the LED first and then converge it. The collimation process requires a relatively large lens aperture, which makes the volume of the entire light-emitting device relatively large and the cost relatively high. That is to say, in the solutions of the related technologies, the light emitted by the array light source needs to be collimated first. Then, according to the principle of conservation of optical étendue, when the light source is fixed, the more collimated the light is, the larger the aperture of the collimating lens is required. Therefore, for the collimating lens array 12 shown in Figure 3, the aperture of each sub-lens needs to be relatively large, usually required to reach 8-10 times the light-emitting size of the light source (i.e., the light-emitting chip in the LED array light source). If the total power requirement is higher and more light-emitting chips are needed for the LED array light source, then due to the magnification effect of the size of the collimating lens array, the size of the collimating lens array will increase rapidly, resulting in a relatively large volume of the entire light-emitting device. Summary of the Invention

[0006] The present application provides an LED light-emitting device, an LED light-emitting system, and an LED lamp for remote lighting, so as to solve the problem that the collimation process requires a relatively large lens aperture, resulting in a relatively large overall volume of the light-emitting device.

[0007] An embodiment of the present application provides a light-emitting device, including:

[0008] an LED array light source, including a plurality of light-emitting chips;

[0009] a light collection device array, including a plurality of light collection devices, each of the light collection devices corresponding to each of the light-emitting chips, the light collection device being configured to collect the light emitted by the corresponding light-emitting chip and make the light exit through the light exit of the light collection device;

[0010] the radius of the inscribed circle of the light exit of the light collection 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 collection device and the light-emitting chip are configured such that: R≤5r; a conduction lens, the conduction lens being opposite to the light exits of the plurality of light collection devices, the conduction lens deflecting the light exiting from the light exits of the light collection devices.

[0011] The light-emitting device includes an LED array light source, and the LED array light source includes a plurality of light-emitting chips. The light-emitting device may further include a light collection device array, and the light collection device array includes a plurality of light collection devices. The light collection devices are arranged corresponding to the light-emitting chips, and the light collection devices are configured to collect the light emitted by the corresponding light-emitting chips and make the light from the corresponding light-emitting chips exit through the light exits of the light collection devices.

[0012] The radius of the inscribed circle of the light-emitting port of the light collection device is R, and the radius of the inscribed circle of the light-emitting surface of the corresponding light-emitting chip (taking a square or a circle as an example) is r. The light collection device and the light-emitting chip are configured such that R ≤ 5r, which can reduce the overall volume of the light-emitting device. However, at the same time, most of the light emitted from the light collection device array is divergent light, and only a small part is collimated light.

[0013] By providing a conduction lens, the conduction lens is used to receive the light emitted from the light collection device array. The conduction lens can conduct the light emitted from the light collection device array, so that the large-angle light beams that are upwardly deflected among the light beams from the light collection device array can form an upper focus after passing through the conduction lens, and this upper focus is located above the focus of the conduction lens. At the same time, the large-angle light beams that are downwardly deflected among the light beams from the light collection device array can form a lower focus after passing through the conduction lens. Therefore, after all the light emitted from the light collection device array passes through the action of the guiding lens, a relatively large light spot will be formed on the focal plane of the conduction lens, and the boundary of this light spot is the upper focus and the lower focus.

[0014] It should be noted that although the conduction lens can still focus the parallel collimated light at the focus, among the light emitted from the light collection device array towards the conduction lens, the parallel collimated light only accounts for a very small part, and most of the light is still divergent. Therefore, the cross-sectional area of the light beam passing through the conduction lens does not significantly decrease during the process of forming the focus, and the conduction lens cannot be simply defined as a focusing lens.

[0015] It can be seen from this that the light-emitting device in the embodiment of the present application, through the cooperating LED array light source, light collection device array and conduction lens, without the need to provide a collimating lens cooperating with the LED array light source, can reduce the overall volume of the light-emitting device, and can also reduce the overall cost of the light-emitting device.

[0016] The embodiment of the present application provides an LED lighting system, including the light-emitting device described in any one of the above, and an angle adjustment lens, and the angle adjustment lens receives the light emitted from the conduction lens.

[0017] The embodiment of the present application provides a remote lighting LED lamp, including the LED lighting system described in any one of the above, and a pattern diaphragm located near the angle adjustment lens, and the pattern diaphragm includes a light-transmitting area with a pattern;

[0018] The remote lighting LED lamp further includes a projection lens, and the projection lens is used to project the pattern of the light-transmitting area of the pattern diaphragm onto the far field; the distance between the pattern diaphragm and the vertex of the light-emitting surface of the angle adjustment lens is less than half of the focal length of the conduction lens. Description of the Drawings

[0019] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0020] Figure 1 It is a schematic structural diagram of a traditional stage lighting light source;

[0021] Figure 2 It is a schematic structural diagram of a light collection device provided by an embodiment of this application;

[0022] Figure 3a It is a schematic structural diagram of an LED lighting system provided by an embodiment of this application;

[0023] Figure 3b It is a schematic structural diagram of another LED lighting system provided by an embodiment of this application;

[0024] Figure 4 It is a schematic structural diagram of yet another LED lighting system provided by an embodiment of this application;

[0025] Figure 5 It is a schematic structural diagram of yet another LED lighting system provided by an embodiment of this application;

[0026] Figure 6 It is a comparison schematic diagram of the lighting device provided by an embodiment of this application and a traditional stage lighting light source;

[0027] Figure 7 It is a schematic structural diagram of yet another LED lighting system provided by an embodiment of this application;

[0028] Figure 8 It is a schematic structural diagram of the lighting device provided by an embodiment of this application;

[0029] Figure 9 It is a schematic structural diagram of yet another lighting device provided by an embodiment of this application;

[0030] Figure 10a It is a schematic structural diagram of yet another LED lighting system provided by an embodiment of this application;

[0031] Figure 10b It is a schematic structural diagram of yet another LED lighting system provided by an embodiment of this application;

[0032] Figure 11 It is a schematic structural diagram of yet another LED lighting system provided by an embodiment of this application;

[0033] Figure 12a It is a schematic structural diagram of a lighting chip provided by an embodiment of this application;

[0034] Figure 12bSchematic structural diagram of an LED array light source provided by an embodiment of the present application;

[0035] Figure 13 Schematic structural diagram of an LED lighting system provided by an embodiment of the present application;

[0036] Figure 14 Schematic structural diagram of an LED lamp for remote lighting provided by an embodiment of the present application;

[0037] Figure 15a Schematic optical structure diagram of the LED unit in Embodiment VII of the present invention;

[0038] Figure 15b and Figure 15c respectively represent Figure 15a the three-dimensional view and the top view of the LED unit shown;

[0039] Figure 16 Three-dimensional view of the LED unit array in Embodiment VII of the present invention;

[0040] Figure 17 Three-dimensional view of the light-emitting device in Embodiment VII of the present invention;

[0041] Figure 18a represent Figure 17 Schematic optical structure diagram of the light-emitting device shown applied to an LED lamp for remote lighting;

[0042] Figure 18b represent Figure 18a Side view in the -Z direction of the light-emitting device in the embodiment shown;

[0043] Figure 18c represent Figure 18a Schematic diagram of the working principle of the reflection diaphragm of the light-emitting device in the embodiment;

[0044] Figure 19a Partial enlarged view of the reflection tip in another embodiment;

[0045] Figure 19b represent the application of Figure 19a Schematic structural diagram of the light-emitting device with the reflection tip shown;

[0046] Figure 20a and Figure 20b respectively represent the three-dimensional views of the hexagonal LED unit and its LED unit array in another embodiment;

[0047] Figure 21 Schematic structural diagram of an LED linear array in another embodiment;

[0048] Figure 22 Shows a schematic optical structure diagram of an LED luminaire for remote lighting using a light-emitting device based on an LED linear array;

[0049] Figure 23 Shows a schematic diagram of a far-field light spot in another embodiment;

[0050] Figure 24a Shows a schematic structure diagram of a light-emitting device in another embodiment;

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

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

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

[0054] Figure 26 Is a schematic structure diagram of a light-emitting device provided by an embodiment of the present application.

[0055] Through the above-mentioned drawings, the clear embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0056] As described in the background art, traditional light-emitting devices include an LED array light source, a collimating lens array, a fly-eye lens group, and a converging lens, so as to form a converging light spot. In the related art, since the light emitted by the LED array light source needs to be collimated first, according to the principle of conservation of optical étendue, when the light source is fixed, the more collimated the light is, the larger the aperture of the collimating lens is required. Therefore, in the related art, 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] Assume that the light-emitting chips in the LED array light source are arranged in a circular array, and 10 1-mm light-emitting chips are placed along the diameter direction of the circular array. Considering that the size of the collimating lens array needs to be enlarged by 8-10 times relative to the size of the LED array light source, the diameter of the collimating lens array is then 80-100 mm. If a higher total power is required and more light-emitting chips are needed for the LED array light source, due to the magnification effect of the size of the collimating lens array, the size of the collimating lens array will increase even more rapidly. Moreover, in order to improve the uniformity of light, in the related art, it is usually necessary to provide a relatively thick fly-eye lens group 3 on the light-emitting side of the collimating lens array, making the volume of the traditional light-emitting device relatively large and bulky.

[0058] To solve the above problems, in some possible implementation manners of this solution, a light collection device with a smaller size is used to collect the light emitted by the light-emitting chips, and its schematic diagram is as Figure 2 shown. The in-circle radius of the light-emitting surface of the light-emitting chip 201a is r, and the in-circle radius of the light-emitting outlet of the light collection device 202a is R. Different from the traditional light-emitting device, R in this solution is not much larger than r. Through such a design, the light collection device 202a can collect the light emitted by the light-emitting chip 201a, and the light 221 emitted from the light collection device 202a will be emitted at a certain angle (of course, it also includes a small part of the light biased towards collimation, such as the light ray 221a). This solution realizes the divergence angle of the light beam 221 required by this solution by reasonably designing the ratio of R / r.

[0059] To achieve the stage light effect, the Figure 2 shown light-emitting chips and light collection devices can be respectively arranged in an array to form an LED array light source 301 and a light collection device array 302, and then a lens 303 is provided at the optical path rear end of the light collection device array 302, as Figure 3a shown. This lens 303 can converge the incident parallel light to form a focal point. Then, the collimated light part 321 in the light emitted from the light collection device array 302 converges at the focal point 322 after passing through the lens 303.

[0060] However, different from the working principle of the traditional light-emitting device, the concept of this solution is based on the light emitted at a certain angle from the light collection device array to form a light spot. Therefore, compared with how the light 321 biased towards collimation (occupying a very small part of the total emitted light) emitted from the light collection device array 302 forms a light spot, this solution essentially considers the conduction mode of the large-angle light emitted from the light collection device array 302 through the lens 303. Regarding this, as Figure 3bAs shown, in this solution, the large-angle beam 323 that is upwardly deflected in the figure forms an upper focal point 326 after passing through the lens 303, and this upper focal point 326 is located above the focal point 322; at the same time, the large-angle beam 324 that is downwardly deflected forms a lower focal point 327 after passing through the lens 303, and this lower focal point 327 is located below the focal point 322. Therefore, for the LED lighting device based on this solution, all the light emitted from the light collection device array 302 will form a relatively large light spot on the focal plane of the lens 303 after the action of the lens 303, and the boundary of this light spot is the upper focal point 326 and the lower focal point 327. Obviously, the larger the angle of the light emitted from the light collection device array 302, the larger the diameter of the light spot 325 formed on the focal plane of the lens 303.

[0061] In summary, this solution overcomes the traditional idea of forming a light spot based on collimated light (the as-collimated-as-possible light achieved with collimation as the structural design goal) in traditional solutions. Instead, by designing the ratio of R / r while keeping the size r of the light-emitting chip unchanged, it increases the angle of the light emitted from the light collection device array and further increases the size of the light spot 325 formed on the focal plane of the lens 303. Therefore, in this solution, there is no need to set a large-volume collimating lens, which realizes a significant reduction in the system volume, and at the same time, the size of the light spot 325 can also be significantly increased. Therefore, it should be noted that in this solution, the lens 303 is different from the converging lens in traditional lighting devices, but plays the role of beam conduction (because the cross-sectional area of the beam does not significantly decrease during the process of forming a focal point).

[0062] An embodiment of the present application provides an LED lighting device, an LED lighting system, and a remote lighting LED lamp. Among them, the LED lighting device includes an LED array light source 401, and the LED array light source 401 includes a plurality of light-emitting chips. The lighting device may further include a light collection device array 402, and the light collection device array 402 includes a plurality of light collection devices. Each light collection device is correspondingly arranged with each light-emitting chip. The light collection device is used to collect the light emitted by the corresponding light-emitting chip and enable the light from the corresponding light-emitting chip to exit through the light exit port of the light collection device.

[0063] By providing a conduction lens, the conduction lens is used to receive the light emitted from the light collection device array 402. The conduction lens can conduct the light emitted from the light collection device array 402, so that the large-angle beam that is upwardly deflected in the light from the light collection device array 402 can form an upper focal point after passing through the conduction lens, and this upper focal point is located above the focal point of the conduction lens. At the same time, the large-angle beam that is downwardly deflected in the light from the light collection device array 402 can form a lower focal point after passing through the conduction lens. Therefore, all the light emitted from the light collection device array 302 will form a relatively large light spot on the focal plane of the conduction lens after the action of the conduction lens, and the boundary of this light spot is the upper focal point 326 and the lower focal point 327.

[0064] It can be seen that in the LED lighting device according to the embodiment of the present application, through the cooperating LED array light source, light collection device array, and conduction lens, there is no need to provide a large-volume collimating lens that cooperates with the LED array light source, thereby being able to reduce the overall volume of the lighting device and lower the overall cost of the lighting device. And because the divergent light emitted by the light collection device array in this solution is relatively uniform itself, it is possible to not provide a light homogenizing component such as a fly-eye lens, thereby reducing the light loss during the optical path transmission, achieving a better spot brightness. In addition, in the scenario of stage light sources, the lighting device usually needs to swing under the drive of a driving device to adjust the orientation of the lighting device. For example, the follow lights commonly seen in stage lighting require the lights to follow and move on-site. It can be understood that since the overall volume of the lighting device provided by this solution is reduced and it is more lightweight, when the lighting device receives the same torque from the driving device, the swinging process of the lighting device is more flexible, and the swinging amplitude of the lighting device is larger, and the use effect of the lighting device is better.

[0065] The following will specifically describe the technical solution of the present application and how the technical solution of the present application solves the above technical problems in specific embodiments. These several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The following will describe the embodiments of the present application with reference to the drawings.

[0066] To solve the problem of excessive volume, in this embodiment, a light collection device with a smaller size is used to collect the light emitted by the array light source, and its schematic diagram is as Figure 2 shown.

[0067] Figure 2 is a schematic structural diagram of an LED lighting device provided by an embodiment of the present 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 collection device 202a is R.

[0068] In this embodiment, it is designed that R is not much larger than r, that is, the light collection device 202a can play a certain role in collecting the light emitted by the light-emitting chip 201a. The light 221 emitted from the light collection device 202a is non-collimated light, that is, it will be emitted at a certain angle. The non-collimated light emitted by the light collection device mentioned in this article means that when designing the optical structure, it is not required that the emitted light is collimated light as in the related art. On the contrary, the design requirement of this embodiment is that it is hoped that the emitted light of the light collection device is light with a certain divergence angle. Of course, this does not exclude that in this embodiment, the light emitted by the light collection device 202a may include some light in the direction of being more collimated. For example, see Figure 2The light ray 221a therein, because in this embodiment, the outgoing direction of a small part of the light rays emitted by the light collection device may just be consistent with the direction of the collimated light, but it only accounts for a small part of the light emitted by the light collection device 202a, which does not affect the definition of the 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 in this article refers to the light emitted by the light collection device designed according to the structural design requirements for emitting non-collimated light. That is to say, the concept of this embodiment is different from the light-emitting devices in the related art. The light-emitting devices in the related art all form light spots based on the focusing of collimated light, while this embodiment conducts light based on non-collimated light to form light spots.

[0069] In practical applications, the existing stage lighting requirements are often diverse. For example, for the shape, size, etc. of the displayed light spots, diverse and dynamic display requirements are needed. In the prior art, for different lighting requirements, corresponding light-emitting devices need to be customized, resulting in high costs. However, the light-emitting device provided in this embodiment, because it processes non-collimated light, can provide adaptation to various lighting requirements. That is to say, the light-emitting device in this embodiment is similar to a standard part and provides an adaptation function. That is, according to different stage lighting needs, by adapting the corresponding angle-adjusting lens, various stage lighting needs can be met, and there is no need to separately customize different light-emitting devices, thus effectively reducing costs.

[0070] In one example, the Figure 2 shown light-emitting chips and light collection devices are respectively arranged in an array to form an LED array light source 301 and a light collection device array 302, and then a conduction lens 303 is arranged at the optical path rear end of the light collection device array 302, that is, as Figure 3a shown, Figure 3a is a schematic structural diagram of a light-emitting device provided by an embodiment of the present application. Figure 3a In it, the conduction lens 303 can converge the incident parallel light to form a focal point. Then a small part of the light 321 in the collimated direction among the light rays emitted by the light collection device array 302 converges at the focal point 322 after passing through the conduction lens 303. It should be noted that Figure 3a shows a schematic diagram of the conduction lens 303 processing this small part of parallel light rays whose direction is consistent with the collimated direction among the light rays emitted by the light collection device 202a. However, as mentioned before, the core of this solution is to form a light spot based on the non-collimated light emitted by the light collection device. That is, the design goal of the LED light-emitting device in this embodiment is different from the light-emitting devices in the related art, that is, it does not pursue the emission of collimated light by the light collection device array 302. On the contrary, due to the design with a reduced size of R, the light collection device array 302 in this solution is mainly used to emit non-collimated light.

[0071] Combined with Figure 3bFurther explanation is made on the principle of forming a light spot by the non-collimated light of the light collection device array 302. As Figure 3b shown, Figure 3b FIG. 4 is a schematic structural diagram of another light-emitting system provided by an embodiment of the present application. Specifically, Figure 3b FIG. 4 shows a schematic diagram of the conduction lens 303 processing the light with a certain angle emitted from the light collection device 202a. In the figure, the large-angle light beam 323 deflected upward can also form an upper focal point 326 after passing through the conduction lens 303, and the upper focal point 326 is located above the focal point 322; at the same time, the large-angle light beam 324 deflected downward can form a lower focal point 327 after passing through the conduction lens 303, and the lower focal point 327 is located below the focal point 322. Therefore, after all the light emitted from the light collection device array 302 passes through the action of the conduction lens 303, a relatively large light spot will be formed on the focal plane of the conduction lens 303, and the boundary of the light spot is the upper focal point 326 and the lower focal point 327. Obviously, the larger the angle of the light emitted from the light collection device array 302, the larger the diameter of the light spot 325 formed on the focal plane of the conduction lens 303.

[0072] In this embodiment, when the size r of the light-emitting chip remains unchanged, if R decreases, the ratio of R / r will correspondingly decrease, thereby increasing the angle of the light emitted from the light collection device array, and further increasing the size of the light spot 325 formed on the focal plane of the lens 303. Therefore, when the system volume is greatly reduced, the size of the light spot 325 is greatly increased. At this time, it can be said that in this system, the function of the conduction lens 303 is different from that of the converging lens in the related art, but it will play a role in beam conduction, because the cross-sectional area of the beam does not significantly decrease during the process of forming a focal point.

[0073] Specifically, this embodiment proposes an LED light-emitting device, and a schematic structural diagram of one example is as Figure 4 shown. The light-emitting device includes an LED array light source 401, and the LED array light source 401 includes a plurality of light-emitting chips. The light-emitting device further includes a light collection device array 402, and the light collection device array 402 includes a plurality of light collection devices. Each light collection device corresponds 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 exit of the light collection device. The radius of the inscribed circle of the light exit of the light collection device is R, and the radius of the inscribed circle of the light-emitting surface of the corresponding light-emitting chip is r, and R≤5r. As described above, R≤5r can reduce the volume of the system, so that most of the light emitted from the light collection device array is non-collimated light, that is, divergent light. Under the combined conduction of the conduction lens 403, a light spot 425 is formed, that is, the technical solution of forming a light spot based on non-collimated light conduction described in this embodiment.

[0074] In one example, 1.5r ≤ R. Specifically, 1.5r ≤ R can ensure that the light-emitting chips in the LED array light source are not too close to each other, and the appropriate spacing between the light-emitting chips can ensure the heat dissipation and service life of the light-emitting chips. In one example, the light collection device and the light-emitting chip can be configured such that 2.5r ≤ R ≤ 4r. When this relationship is satisfied, the heat dissipation of the light-emitting chip and the volume of the light-emitting device can be better balanced.

[0075] 3.6r ≤ R. Specifically, 3.6r ≤ R can further reduce the volume of the system and enable most of the light emitted from the light collection device array to be non-collimated light, that is, divergent light.

[0076] In one example, a circular light-emitting chip with r = 0.7 mm can be selected (the full-power load is about 12 watts and the heat generation is about 8 watts), and a light collection device with an output aperture radius of R = 2.1 mm can be set (that is, R = 3r. At this time, the divergence angle of the light beam of the light-emitting chip is about 39 degrees, where the divergence angle of the light beam is equal to -1 (r / R) multiplied by two).

[0077] At this time, the light collection device will not be too small to be difficult to process. At the same time, the center distance between adjacent light-emitting chips is 2R = 4.2 mm, and this spacing can dissipate the heat of a single 8-watt heat, ensuring effective heat dissipation during the light-emitting process of the light-emitting chip. That is to say, within the value range provided in this embodiment, it is possible to form a light spot based on non-collimated light and reduce the volume of the system.

[0078] On this basis, the smaller R is, the smaller the system volume can be designed. The larger R is, the larger the spacing between the light-emitting chips, that is, the better the heat dissipation and the higher the efficiency. In practical applications, it can be designed according to actual situations and requirements. As an example, the ratio of the radius R of the inscribed circle of the output aperture of the light collection device to the radius r of the inscribed circle of the light-emitting surface of the corresponding light-emitting chip can be set within any ratio 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] Moreover, by setting a conduction lens, the conduction lens is used to receive the light emitted from the light collection device array 402. The conduction lens can conduct the light emitted from the light collection device array 402, so that the large-angle light beams that are upwardly deflected among the light beams from the light collection device array 402 can form an upper focus after passing through the conduction lens, and this upper focus is located above the focus of the conduction lens. At the same time, the large-angle light beams that are downwardly deflected from the light collection device array 402 can form a lower focus after passing through the conduction lens. Therefore, after all the light emitted from the light collection device array 302 passes through the action of the guiding lens, a relatively large light spot will be formed on the focal plane of the conduction lens, and the boundary of this light spot is the upper focus 326 and the lower focus 327.

[0080] It should be noted that although the conductive lens can still focus parallel collimated light at the focal point, in the light emitted by the light collection device array towards the conductive lens, the light in the collimation direction only accounts for a very small part, and most of the light is still divergent. Therefore, during the process of the beam cross-sectional area passing through the conductive lens not significantly decreasing to form a focal point, the conductive lens cannot be simply defined as a focusing lens. It can be seen that the light-emitting device in this embodiment, through the cooperating LED array light source, light collection device array, and conductive lens, does not require a collimating lens to cooperate with the LED array light source, thereby being able to reduce the overall volume of the light-emitting device and, moreover, being able to reduce the overall cost of the light-emitting device.

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

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

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

[0084] Each light-emitting chip can include a red sub-chip, a green sub-chip, and a blue sub-chip, and 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] Or, the number of sub-chips can be set to four, and the four sub-chips can include a red sub-chip (i.e., R in the figure), a green sub-chip (i.e., G in the figure), a blue sub-chip (i.e., B in the figure), and a white sub-chip (i.e., W in the figure). Among them, the red sub-chip can emit red light, the green sub-chip can emit green light, the blue sub-chip can emit blue light, and the white sub-chip can emit white light.

[0086] It is easy to understand that by adjusting parameters such as the light-emitting timing and light-emitting 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, so that the light-emitting chip can be used to emit light of different colors, and further improve the light-emitting effect of the light-emitting device.

[0087] In some possible embodiments, in the same light-emitting chip, the orientations of the sub-chips can be the same or approximately the same, such that the light-emitting directions of the sub-chips are the same or approximately the same.

[0088] Exemplarily, the light-emitting chip can have a light-emitting surface, and the light-emitting surface of the light-emitting chip can be used to refer to the light-emitting area of the light-emitting chip. The light-emitting surface of the light-emitting chip can be perpendicularly arranged with respect to the thickness direction of the light-emitting chip. For example, the light-emitting surface of the light-emitting chip can be set as a plane perpendicular to the thickness direction of the light-emitting chip.

[0089] The size of the light-emitting surface of the light-emitting chip can be determined according to the overall light-emitting area of the light-emitting chip. For example, when the light-emitting chip includes multiple sub-chips, there may be a gap between the multiple sub-chips, such that the light-emitting area of the light-emitting chip is generally larger than the sum of the light-emitting areas of the multiple sub-chips. Then, the light-emitting surface of the light-emitting chip needs to be determined according to the overall light-emitting area of the light-emitting chip.

[0090] The shape of the light-emitting surface of the light-emitting chip can be determined according to the arrangement manner of the multiple sub-chips, or the shape of the light-emitting surface of the light-emitting chip can be determined according to the actual needs of the light-emitting device. For example, the shape of the light-emitting chip can be set as a square or a circle, etc.

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

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

[0093] In this way, different color sub-chips can be controlled separately, and different color light spots can be emitted. Exemplarily, the light-emitting chip can be formed by splicing at least two sub-chips. If the two sub-chips have different light-emitting colors, the purpose of emitting colored light can be achieved.

[0094] When forming an array through multiple sub-chips, in the LED array light source 1, at least two light-emitting chips can include sub-chips of the same color. The placement orientations of these two sub-chips of the same color in their respective light-emitting chips can be different.

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

[0096] It is easy to understand that in the application of stage lights, colored lights are a common requirement. Of course, colors 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 color filters can be set on the light-emitting sides of different sub-chips, so that the white light emitted by different sub-chips can pass through different color filters to achieve different colors of colored light.

[0097] Compared with the method of setting color filters, by selecting sub-chips that can emit multiple different colors of light in the same light-emitting chip, the light-emitting control process of the light-emitting chip can be made more convenient, and the number of colors of colored light that can be achieved is not limited by the number of color filters.

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

[0099] Exemplarily, the number of convex lenses can be set to two. The two convex lenses can be successively oriented towards the light-emitting surface of the corresponding light-emitting chip, and the geometric axes of the two convex lenses can be 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 successively by the two convex lenses and then exit from the light outlet of the light collection device.

[0100] The light outlet of the light collection device can be determined according to the diameter of the convex lens. Among the two convex lenses, when the diameters of the two convex lenses are the same, the inscribed circle diameter of the light outlet of the light collection device can be equal to the diameter of the convex lens. When the diameters of the two convex lenses are different, the inscribed circle diameter of the light outlet of the light collection device can be equal to the larger one of the diameters of the two convex lenses. For example, the diameter of the light outlet of the light collection device can be equal to the diameter of the convex lens farther from the light-emitting chip among the two convex lenses.

[0101] The light collection device is provided with at least two convex lenses, so that the specifications of the convex lenses in the light collection device can be adjusted according to the needs of the light collection device, the cooperation mode 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 r = 0.7 mm can be selected, and the light collection device includes two convex lenses. The diameter R of the convex lens farther from the light-emitting chip among the two convex lenses (i.e., the inscribed circle diameter of the light outlet of the light collection device) can be set to 2.1 mm. At this time, R = 3r, and the divergence angle of the light beam between the light-emitting chip and the light collection device is about 39 degrees, which can better balance the heat dissipation of the light-emitting chip and the volume of the light-emitting device.

[0103] In some possible implementation manners, the light collection device may include a reflector cup, the reflector cup has an incident light port and an exit light port that are opposite to each other, and a reflecting inner wall located between the incident light port and the exit light port.

[0104] Exemplarily, the light incident port of the reflector cup can face 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 is reflected and then exits from the light exit port of the reflector cup. The light exit port of the reflector cup is the light exit port of the light collection device.

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

[0106] By providing the reflector cup, the reflector cup can be used to collect the light from the light emitting chip, the shape and structure of the reflector cup are more stable, and the assembly process of the reflector cup is more convenient compared with a plurality of cooperating convex lenses.

[0107] In one example, a light emitting chip with r = 0.7 mm can be selected. The light collection device is a reflector cup. The light incident port of the reflector cup can be close to the light emitting surface of the light emitting chip. The diameter R of the light exit port of the reflector cup (i.e., the inscribed circle diameter of the light exit port of the light collection device) can be set to 2.1 mm. At this time, R = 3r, and the divergence angle of the light beam between the light emitting chip and the light collection device is about 39 degrees, which can better balance the heat dissipation of the light emitting chip and the volume of the light emitting device.

[0108] In some possible implementation manners, the number of the LED array light sources is at least two, the light emitting colors of the LED array light sources are different, and the LED array light sources can all emit light toward the corresponding light collection device array.

[0109] Exemplarily, the LED light emitting device can include a first LED array light source and a corresponding light collection device array, a second LED array light source and a corresponding light collection device array, and the light emitting colors of the first LED array light source and the second LED array light source are different.

[0110] The LED light emitting device can further include a beam splitting and filtering film. The beam splitting and filtering film can transmit the light emitted by the first LED array light source and reflect the 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 exits and transmits through the beam splitting and filtering film to form a first exit light. The light emitted by the second LED array light source is collected by the corresponding light collection device array and then exits and is reflected by the beam splitting and filtering film to form a second exit light. After the first exit light and the second exit light are combined into a beam, they are incident on the conduction lens.

[0111] Exemplarily, the number of LED array light sources can also be set to more than three. For example, the number of LED array light sources can be set to three. The three LED array light sources can be respectively used to emit red light, green light, and blue light, and the light-emitting directions of at least two of the three LED array light sources are different.

[0112] The number of the light collection device arrays can be the same as the number of the LED array light sources. For example, the number of the light collection device arrays can be set to three. Each LED array light source can emit light toward the corresponding light collection device array, and the light collection device array can acquire the light of the corresponding LED array light source and emit it through the light-emitting port of the light collection device.

[0113] Exemplarily, the beam splitter filter can have multiple light incident surfaces and a light-emitting surface. The beam splitter filter can acquire the emitted light from multiple light collection device arrays through the multiple light incident surfaces, so as to combine the emitted lights of the multiple light collection device arrays through the beam splitter filter. The beam splitter filter can emit light toward the conduction lens through the light-emitting surface to achieve colored lights of different colors.

[0114] The number of the light incident surfaces can be set to three. The three LED array light sources can respectively emit light toward the light incident surfaces through the corresponding light collection device arrays, so that the beam splitter filter can combine the lights from the three LED array light sources to form colored light, and enable the colored light to propagate toward the conduction lens.

[0115] The function of the beam splitter filter is to reflect the light of a certain wavelength band (such as a certain color) while transmitting the light of other wavelength bands. The wavelength bands of the reflected and transmitted light can be set during the design of the beam splitter filter. The beam splitter filter can be used to couple the lights of different colors and emit them together, so that the lights of different colors multiplex the same optical channel, thereby improving the brightness.

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

[0117] When combining the lights from the three LED array light sources through the beam splitter filter, the lights emitted by the two LED array light sources toward the first light incident surface and the second light incident surface can be reflected by the beam splitter filter, so that the lights can be emitted from the light-emitting surface. The light emitted by the LED array light source toward the third light incident surface can be transmitted through the beam splitter filter, so that the light can be emitted from the light-emitting surface, thereby realizing the process of combining lights.

[0118] It should be noted that since the number of LED array light sources is multiple, the arrangement directions of at least some of the multiple LED array light sources are different. Compared with the related art where a collimating lens array is used, in this solution, the sizes of the beam splitting and filtering film in at least two directions are reduced, which makes the overall volume of the beam splitting and filtering film smaller.

[0119] Alternatively, the shape of the beam splitting and filtering film can be set as a sheet (such as a dichroic mirror), and the number of the beam splitting and filtering films can be set as at least one. The beam splitting and filtering film can reflect light of a certain wavelength band while transmitting light of other wavelength bands. The light from some of the LED array light sources can change its direction after being reflected by the beam splitting and filtering film, and the light from another part of the LED array light sources can pass through the beam splitting and filtering film, so that the outgoing directions of the light from the multiple LED array light sources are the same, thus realizing the process of combining light. Among them, the surface of the beam splitting and filtering film that faces the light emitting surface of the LED array light source is the incident light surface, and the surface of the beam splitting and filtering film that faces the light output of the conduction lens is the light output surface.

[0120] Three LED array light sources can be arranged at different positions of the light combining element, so that the structure of the light combining element is smaller. The side length of the light combining element can be determined according to one LED array light source, thereby making the overall structure volume composed of the LED array light source, the light collection device array, the light combining structure and the conduction lens more compact.

[0121] When the light combining element is set as one or more beam splitting and filtering films, the combined light brightness formed by the LED array light source, the light collection device array and the light combining structure is greater, making the light emitting effect of the LED light emitting device better.

[0122] Specifically, the light emitting device of this embodiment further includes a conduction lens 3, and the conduction lens 3 can be arranged on the light output side of the light collection device array 2. In the plane parallel to the light emitting surface of the light emitting chip, the area of the conduction lens 3 can be larger than the area of the light collection device array 2, so that the conduction lens 3 can obtain the light from the light collection device array 2.

[0123] In some possible implementation manners, the conduction lens 3 can be set as a convex lens. For example, the conduction lens 3 can be set as a plano-convex lens, or the conduction lens 3 can also be set as a biconvex lens.

[0124] Alternatively, the conduction lens 3 can be set as a Fresnel lens to reduce the thickness of the conduction lens 3, so as to further reduce the volume of the light emitting device.

[0125] It should be noted that by arranging the conduction lens 3 at the optical path rear end of the light collection device array 2, the conduction lens 3 can converge the incident parallel light to form a focal point. Then, the collimated light part of the light emitted from the light collection device array 2 can be converged at the focal point after passing through the conduction 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. Different from traditional stage lighting light sources, it does not pursue collimated light emitted by the light collection device array 2. On the contrary, the light collection device array 2 of this solution is used to emit non-collimated light.

[0127] The conduction lens 3 can be used to receive and conduct the light emitted from the light collection device array 2, so that the large-angle upwardly deflected light beam (i.e., the upward edge light beam) in the light rays from the light collection device array 2 can form an upper focus after passing through the conduction lens 3, and this upper focus is located above the focus of the conduction lens 3.

[0128] At the same time, the large-angle downwardly deflected light beam (i.e., the downward edge light beam) from the light collection device array 2 can form a lower focus after passing through the conduction lens 3. Therefore, after all the light emitted from the light collection device array 2 passes through the conduction lens, a relatively large light spot will be formed on the focal plane of the conduction lens 3 (i.e., the plane passing through the focus and perpendicular to the optical axis), and the boundary of this light spot is the upper focus and the lower focus.

[0129] After all the light emitted from the light collection device array 2 passes through the conduction lens 3, a relatively large conduction light spot will be formed on the focal plane of the conduction lens 3. The conduction light spot can be set as follows: when no light deflection structure (such as an angle adjustment lens) is provided at the rear end of the conduction lens 3, the conduction light spot is located on the focal plane of the conduction lens 3. For example, the conduction light spot can also be understood as the light spot with the smallest size near the focal plane of the conduction lens 3, and the boundary of this conduction light spot is the boundary where the upper focus and the lower focus are located.

[0130] Obviously, the larger the angle of the light emitted from the light collection device array 2, the larger the diameter of the conduction light spot formed on the focal plane of the conduction lens 3. Exemplarily, the conduction lens 3 can converge the incident parallel light to form a focus, and the focal length of this conduction lens 3 is F1; this conduction lens 3 is used to receive the light emitted from the light collection device array 2, and the diameter of the circumscribed circle of the light spot range incident on the surface of the conduction lens 3 is D1, and 0.4F1 ≤ D1 ≤ 2F1, which ensures the control of the divergence angle of each emitted light beam to better process the divergent light emitted by the light collection device and better form a light spot. As an example, the ratio of the diameter D1 of the circumscribed circle of the light spot range incident on the surface of the conduction lens 3 to the focal length F1 of the conduction lens 3 can be set within any ratio 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 divergent light incident on the conduction lens can be regarded as a combination of many sub-parallel light beams propagating in different directions. After passing through the conduction lens, each such sub-parallel light beam will converge, and the divergence angle of its light beam itself is restricted 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 also required at the rear end of the optical path of the light-emitting device to receive the light emitted by the light-emitting device, a more preferred value range is 0.6F1 ≤ D1 ≤ 1.2F1. The divergence angle within this value range can be received by commonly used projection lenses, which is convenient for subsequent adaptation.

[0132] It should be noted that since the function of the conduction lens 3 is different from that of the converging lens in the related art, but plays the role of light beam conduction, and there is no process of significantly reducing the cross-sectional area of the light beam to form a focus, it is distinguished from the converging lens in the related art, and it is called the conduction lens 3 in this article.

[0133] Although the conduction lens 3 can still focus parallel collimated light at the focal point, among the light emitted by the light collection device array 2 towards the conduction lens 3, parallel collimated light only accounts for a very small part, and most of the light is still divergent. Therefore, there is no process of significantly reducing the cross-sectional area of the light beam passing through the conduction lens 3 to form a focus, and the conduction lens 3 cannot be simply defined as a focusing lens.

[0134] In the above description, the relationship between r and R is restricted (i.e., the divergence degree of the divergent light of the light collection device is restricted), and the relationship between D1 and F1 is also restricted (i.e., the divergence angle of the sub-parallel light beam at the conduction light spot after passing through the conduction lens 3 is restricted). Further, by reasonably setting the values of r, R, D1, and F1, the highest brightness of the light spot can be achieved under the same efficiency condition.

[0135] In one example, the relationship between r, R, D1, and F1 satisfies that the divergence degree of the divergent light of the light collection device matches the divergence angle of the sub-parallel light beam at the conduction light spot after passing through the conduction lens 3. In this regard, in one example, r, R, D1, and F1 satisfy the following relational expressions:

[0136]

[0137] This relational expression can limit the divergence degree of the divergent light of the light collection device to match the divergence angle of the sub-parallel light beam at the conduction light spot after passing through the conduction lens 3. When this matching relationship is satisfied, the efficiency of the light is higher, and the light intensity is not easily diluted, that is, the brightness of the light is higher.

[0138] In one example, a light-emitting chip with r = 0.7 mm can be selected, that is, the inner diameter R of the light-emitting port of the light collection device can be set to 2.1 mm. At this time, R = 3r, and the divergence angle of the light beam between the light-emitting chip and the light collection device is about 39 degrees.

[0139] That is to say, The value of can be approximately set to be greater than or equal to 11.7 degrees and less than or equal to 29.25 degrees, so as to determine the setting method of the conduction lens (such as parameters and setting positions, etc.) according to the divergence angle of the light beam between the light-emitting chip and the light collection device.

[0140] Make the size of the focused spot formed by the traditional light source equal to the size of the conduction spot formed by the solution of this embodiment, that is, when forming spots of the same size (that is, the luminous performance is basically the same), compare the volume differences of the two systems. It can be seen that in all directions, the size of this embodiment in all directions is reduced by more than half, that is to say, the volume of this embodiment is only (1 / 2) of the traditional light source 3 = 1 / 8.

[0141] In one example, the outer diameter of the LED array light source is M, and the outer diameter of the smallest spot (i.e., the conduction spot) formed at the rear end of the optical path of the conduction lens 3 by the light-emitting device is N. Preferably, M ≤ 2.5N. Under this condition, the spot formed can be regarded as the spot generated by "conduction" rather than the spot generated by "focusing" in the traditional solution. It should be noted that in other examples, even if the angle adjustment lens is not provided, the volume of the light-emitting device provided in this embodiment is significantly reduced compared with the volume of the light source device in the traditional solution.

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

[0143] It should be noted that in the related art, 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 to ensure the arrangement of the collimating lenses in the collimating lens array, which also makes the volume of the light-emitting device in the related art larger.

[0144] In the embodiment of the present application, through the cooperating LED array light source 1 and the light collection device array 2, the size of the light collection device is reduced, the distance between the light-emitting chips in the LED array light source 1 is reduced, and the overall volume of the LED array light source 1 will also be reduced.

[0145] Moreover, since the volume of the optical collection device array is smaller than that of the collimating lens array, the volume of the conduction lens 3 located at the rear end of the optical collection device array 2 in the embodiments of the present application is also correspondingly reduced compared with the converging lens located at the rear end of the collimating lens array in the related art. As a result, the volume of the light-emitting device can be further reduced, and the overall cost of the light-emitting device can be lowered.

[0146] In some possible implementation manners, the light-emitting device further includes a light homogenizing structure 5 located between the optical collection device array 2 and the conduction lens. The light homogenizing structure 5 can be used to receive the light from the optical collection device array 2 and allow the light to propagate through the light homogenizing structure 5 to the conduction lens. The light homogenizing structure 5 can homogenize the incident light from the optical collection device array 2 to improve the uniformity of the incident light.

[0147] Exemplarily, the light homogenizing structure 5 can include a plurality of fly-eye lenses. The plurality of fly-eye lenses can include a first fly-eye lens and a second fly-eye lens arranged in sequence along the optical path. The first fly-eye lens includes a plurality of first convex lenses arranged closely to each other, and the second fly-eye lens includes a plurality of second convex lenses arranged closely to each other. The first fly-eye lens and the second fly-eye lens can be used to homogenize the incident light.

[0148] The first fly-eye lens and the second fly-eye lens can be arranged at intervals, and the propagation medium between the first fly-eye lens and the second fly-eye lens can be set as air or the like. The first fly-eye lens can be located on the side of the second fly-eye lens close to the optical collection array, so that the light from the optical collection device array 2 can pass through the first fly-eye lens and the second fly-eye lens in sequence.

[0149] Alternatively, the first fly-eye lens and the second fly-eye lens can be integrally formed to form a fly-eye lens body, and the first fly-eye lens and the second fly-eye lens respectively form two opposite surfaces of the fly-eye lens body. The first fly-eye lens can be set as the part of the fly-eye lens body facing the optical collection device, and the second fly-eye lens can be set as the part of the fly-eye lens body away from the optical collection device.

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

[0151] In the implementation manner of the present application, the light emitted from the optical collection device array 2 is divergent light. Since the divergence angle of the divergent light is large, the optical path between the two fly-eye lenses will be shortened. This also makes the distance between the two fly-eye lenses in the fly-eye lens body smaller, and the thickness of the fly-eye lens body can be correspondingly reduced, thereby reducing the volume of the light-emitting device and improving the brightness of the light-emitting device.

[0152] Moreover, compared with two separate compound eye lenses, the integrally formed compound eye lens body has a lower cost. Since the light-emitting device is small in size, the technical difficulty of integrally forming the compound eye lens body is greatly reduced, the area of the compound eye lens body is also greatly reduced, and the cost is greatly reduced.

[0153] As described above, the light homogenizing structure 5 such as the compound eye lens is not necessary in the embodiment of the angle adjustment lens 4 of the present application, but if used, the uniformity can be further improved. In addition, if the light-emitting chip includes a plurality of sub-chips, then using the compound eye lens can improve the uniformity of color mixing.

[0154] A light homogenizing structure 5 may not be provided between the light collection device array 2 and the conduction lens 3. Compared with the traditional focused spot, the conduction spot generated by conduction has a significant advantage. When the projection lens in the rear optical path zooms, there must be a focusing process. During this focusing process, the projected spot is in a defocused state, and in practice, it is required that the uniformity of the spot is not too poor even in the defocused state during the focusing process.

[0155] Compared with the traditional focused spot, in this embodiment, the conduction spot generated by the conduction lens also has a significant advantage. When the projection lens in the rear optical path zooms, there must be a focusing process. During this focusing process, the projected spot is in a defocused state. For a traditional light source, during the focusing process, as the spot rapidly shrinks, obvious stripes will appear, that is, the uniformity of the spot is poor.

[0156] In this solution, during the conduction process of the light after passing through the conduction lens 3, the spot size does not have a rapid shrinking process. Therefore, during the focusing process, even in the defocused state, the uniformity of the entire spot is relatively good. Therefore, another difference between this solution and the traditional solution is that for a traditional light source, due to the rapid shrinking of the spot during the focusing process, in order to achieve uniformity in the defocused state, a compound eye lens must be used, while in this solution, a compound eye lens can be not used, thus saving costs. Moreover, in this solution, without using the compound eye lens, the brightness of the light-emitting device can also be improved.

[0157] In addition, in order to achieve uniformity in the defocused state in the traditional solution, when a fly-eye lens is set, the shape of the formed light spot is consistent with the imaging shape of the fly-eye lens (such as a hexagon). That is to say, regardless of the shape of the light-emitting surface of the light-emitting chip, such as being circular or rectangular, the formed light spot is a hexagon. However, stage lighting generally requires a circular light spot. Therefore, the hexagon light spot needs to be cut into a circle by a circular diaphragm, resulting in energy loss at the six corners. The proportion of this lost energy is generally 20 - 30%. In this solution, the fly-eye lens can be not set. Therefore, while ensuring uniformity in the defocused state, the shape of the light spot can reflect the shape of the light-emitting surface of the light-emitting chip. For example, it can be square or circular. If a circular light spot is to be achieved, a light-emitting chip with a circular light-emitting surface can be directly used, so that no diaphragm is needed to cut off the light, and there is almost no light loss.

[0158] Exemplarily, the light-emitting device includes a light homogenizing device, and the light homogenizing device can be set as the diffuser 6. The diffuser 6 can be at the rear end of the optical path of the conduction lens 3 (i.e., the light-emitting side of the conduction lens 3), so that the diffuser 6 can homogenize the conduction light spot formed by the conduction lens 3.

[0159] The size of the light spot is proportional to the sum of the sizes of the light-emitting surfaces of the chips in the LED array light source. In system design, it is desired that the divergence angle of the light is determined by the convergence angle determined by the effective aperture D1 and the focal length F1 of the conduction lens 3. Since the size of the light spot becomes larger, the overall upward and downward deflection of the light beam may introduce an additional deflection angle. When the size of the light spot is relatively large, the superposition of the light beam angle and the deflection angle may generate light rays with a relatively large angle.

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

[0161] Exemplarily, the angle-adjusting lens 4 can be located near the focal plane of the conduction lens 3. The angle-adjusting lens 4 has little influence on the incident light beam from the conduction lens 3 and its own divergence angle, but has a correction effect on the overall deflection angle of the incident light beam. The angle-adjusting lens 4 has little influence on the incident light beam from the conduction lens 3 and its own divergence angle, but has a correction effect on the overall deflection angle of the incident light beam. For example, among the incident light beams from the conduction lens 3, the edge angle light beam deflected upward is corrected downward as a whole after entering the angle-adjusting lens 4, and the edge angle light beam deflected downward is corrected upward as a whole after entering the angle-adjusting lens 4. Finally, the angle of the light emerging from the angle-adjusting lens 4 is reduced and is equal to the divergence angle of each light beam itself.

[0162] Since the angle - adjusting lens 4 is located near the focal plane of the conduction lens 3, it has basically 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, and at the same time can reduce the angle of the light emitted from the light spot, solving the problem of the angular deflection of the edge light beam caused by the enlargement of the light spot.

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

[0164] In the LED lighting system according to the embodiment of the present application, the divergent light (only a small part of which is collimated light) emitted by the light - collecting device is incident on the conduction lens 3. The conduction lens 3 "conducts" the incident light to form a conduction light spot near the focal plane, and then the angle - adjusting lens 4 corrects the overall beam angle. Compared with the traditional light - source structure, the lighting device of this embodiment can keep the area and angle of the light spot unchanged while greatly reducing the volume of the system, so that the stage light using this light source has a smaller volume and lower cost.

[0165] Exemplarily, the angle - adjusting lens 4 is located near the focal plane of the conduction lens 3. Specifically, the distance from the vertex of the light - emitting surface of the conduction lens 3 to the vertex of the light - incident surface of the angle - adjusting lens 4 is L. The conduction lens 3 and the angle - adjusting lens 4 can be configured as: L ≤ 1.5F1.

[0166] Exemplarily, the angle - adjusting lens has a converging effect on the incident parallel light. The angle - adjusting lens receives the light emitted from the conduction lens 3. The diameter of the circumscribed circle of the light - spot range where the light is incident on the surface of the angle - adjusting lens is D2, and the focal length of the angle - adjusting lens 4 is F2, 0.4F2 ≤ D2 ≤ 2F2. The ratio of the focal length F2 of the angle - adjusting lens 4 to the diameter D2 of the circumscribed circle of the light - spot range where the light is incident on the surface of the angle - adjusting lens 4 can be set within any ratio 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 as: 0.6F2 ≤ D2 ≤ 1.2F2. By setting the above - mentioned relationship, the angle - adjusting lens 4 can correct the relatively large - offset angular light rays in the solution of forming a light spot based on non - collimated light, improving the light - spot quality.

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

[0168] Exemplarily, the conduction lens 3 and the angle-adjusting lens 4 can be configured such that 0.5F1 ≤ F2 ≤ 1.5F1. The focal length of the angle-adjusting lens 4 can be equal to or approximately equal to the distance between the angle-adjusting lens 4 and the conduction lens 3 to improve the effect of the angle-adjusting lens 4 on correcting the conduction light spot.

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

[0170] Exemplarily, the distance L from the vertex of the light-emitting surface of the conduction lens 3 to the vertex of the light-incident surface of the angle-adjusting lens 4 can be equal to the focal length F1 of the conduction lens 3. That is to say, the angle-adjusting lens 4 is located on the focal plane of the conduction lens 3. When the distance L from the vertex of the light-emitting surface of the conduction lens 3 to the vertex of the light-incident surface of the angle-adjusting lens 4 is equal to the focal length F1 of the conduction lens 3, the focal length F2 of the angle-adjusting lens 4 can be the same as the focal length F1 of the conduction lens 3. That is to say, the conduction 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 conduction lens 3 to the vertex of the light-incident surface of the angle-adjusting lens 4 can be less than the focal length F1 of the conduction lens 3. That is to say, the angle-adjusting lens 4 is located between the focal plane of the conduction lens 3 and the conduction lens 3. The conduction 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 deviation of the light beam but also has an additional converging effect, that is, it increases the divergence angle of the light beam itself (the light beam first converges, passes through the focal point and then diverges. Therefore, the divergence angle after the focal point is equal to the converging angle before the focal point. The additional converging effect brought by the angle-adjusting lens 4 increases the converging angle, and thus increases the divergence angle of the light beam). At the same time, due to the earlier occurrence of the light beam deviation correction effect, the size of the conduction light spot is also correspondingly reduced.

[0173] Therefore, compared with the way that the angle-adjusting lens 4 is disposed at the focal plane of the conduction lens 3, moving the angle-adjusting lens 4 towards the conduction lens 3 enables the angle-adjusting lens 4 to increase the beam divergence angle while reducing the spot size, still maintaining the unchanged energy density. This situation is also allowed.

[0174] However, if the distance between the angle-adjusting lens 4 and the conduction lens 3 is less than 0.5F1, the angle correction effect of the angle-adjusting lens 4 will become weaker and weaker. At the same time, the converging effect on the beam itself (which becomes a diverging effect after focusing and continuing to propagate) will become stronger and stronger. Until the angle-adjusting lens 4 is completely close to the conduction lens 3, the angle-adjusting lens 4 will completely lose its angle-adjusting function.

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

[0176] When the distance L from the vertex of the light-emitting surface of the conduction lens 3 to the vertex of the light-incident surface of the angle-adjusting lens 4 is less than the focal length F1 of the conduction lens 3, the focal length F2 of the angle-adjusting lens 4 can be reduced to meet the need for adjusting the angle. That is to say, the conduction lens 3 and the angle-adjusting lens 4 can be configured as: F2 ≤ F1.

[0177] Exemplarily, when the distance L from the vertex of the light-emitting surface of the conduction lens 3 to the vertex of the light-incident surface of the angle-adjusting lens 4 is less than the focal length F1 of the conduction lens 3, as long as L' ≤ L is ensured, the correction effect on the conduction spot can be achieved. At this time, the conduction spot also decreases (correspondingly, the divergence angle increases).

[0178] It is easy to understand that the reduction of the conduction spot is not completely caused by convergence as in the traditional structure, but is an acceptable situation in light "conduction".

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

[0180] Alternatively, the distance L from the vertex of the light-emitting surface of the conduction lens 3 to the vertex of the light-incident surface of the angle-adjusting lens 4 can be greater than the focal length F1 of the conduction lens 3. That is to say, the angle-adjusting lens 4 is located on the side of the focal plane of the conduction lens 3 away from the conduction lens 3. The conduction 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 conduction lens 3 to the vertex of the light-incident surface of the angle-adjusting lens 4 is greater than the focal length F1 of the conduction lens 3, the focal length F2 of the angle-adjusting lens 4 can be increased to meet the need for angle adjustment. That is to say, the conduction lens 3 and the angle-adjusting lens 4 can be configured such that F2 ≥ F1.

[0182] It should be noted that when an angle-adjusting lens is provided at the rear end of the conduction lens 3 and the angle-adjusting lens 4 is located between the focal plane of the conduction lens 3 and the conduction lens 3, since the outgoing light from the conduction lens 3 does not form a conduction light spot when reaching the angle-adjusting lens 4, the angle-adjusting lens will have a certain converging effect on the light from the conduction lens 3, causing the formation position of the conduction light spot to move forward, and the position of the conduction light spot is in front of the focal plane.

[0183] When an angle-adjusting lens is provided at the rear end of the conduction lens 3, in some possible cases, the conduction light spot can also be understood as the smallest-sized light spot formed at the rear end of the conduction lens 3.

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

[0185] Alternatively, the angle-adjusting lens 4 can be set as a Fresnel lens to reduce the thickness of the angle-adjusting lens 4, and mechanical interference problems when using optical processing devices such as diaphragms and color filters near the conduction light spot can be reduced, making it more convenient to use. Moreover, the Fresnel lens itself also has a certain light homogenization function.

[0186] In practice, since the conduction light spot is the light spot with the smallest area in the optical path, its brightness is also the highest. The pattern diaphragm is preferably placed at the position of the conduction light spot, and the distance from the pattern diaphragm to the vertex of the light-emitting surface of the angle-adjusting lens 4 is less than half of F1, which can ensure that the brightness of the light at the pattern diaphragm is as high as possible, and thus the brightness of the pattern light projected onto the far field through the projection lens is also as high as possible.

[0187] In some possible embodiments, the LED lighting system includes a dimming device located between the conduction lens 3 and the angle-adjusting lens 4.

[0188] The dimming device can be used to adjust the color, color temperature, angular distribution or surface distribution of light. For example, the dimming device is a CMY filter, which has a light-transmitting area including a colorless transparent area and a colored area. The colorless transparent area and the colored area are mixed with each other, and the area ratio of the colorless transparent area to the colored area is different in at least two sub-areas within the light-transmitting area.

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

[0190] In addition to the CMY filter realizing the control and change of color, the dimming device can include multiple components to achieve the control of other optical effects such as angular distribution and surface distribution.

[0191] An embodiment of the present application provides a lighting fixture, which may include a pattern diaphragm near the angle adjustment lens 4. The pattern diaphragm can be at the front end or the rear end of the optical path of the angle adjustment lens 4. The pattern diaphragm includes a light-transmitting area with a pattern.

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

[0193] According to the previous embodiments, the angle adjustment lens 4 can be located at the front end of the optical path of the conduction light spot or at the rear end of the optical path of the conduction light spot. The distance between the angle adjustment lens 4 and the conduction light spot is generally less than half of F1.

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

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

[0196] Embodiment 1

[0197] As Figure 2As shown, the light-emitting device includes an LED array light source 401, and the LED array light source 401 includes a plurality of light-emitting chips. The light-emitting device further includes a light collection device array 402, and the light collection device array 402 includes a plurality of light collection devices. Each light collection device corresponds to each light-emitting chip. The light collection device is configured to collect the light emitted by the corresponding light-emitting chip and make the light exit through the light exit port of the light collection device.

[0198] The radius of the inscribed circle of the light exit port of the light collection device is R, and the radius of the inscribed circle of the light-emitting surface of the corresponding light-emitting chip is r, where 1.5r ≤ R ≤ 5r. As described above, R ≤ 5r is to reduce the volume of the system, but at the same time, the light exiting from the light collection device array is divergent light, and only a small part of it is collimated light. And 1.5r ≤ R can ensure that the light-emitting chips in the LED array light source are not too close to each other, and an appropriate interval between the light-emitting chips can ensure the heat dissipation and service life of the light-emitting chips.

[0199] In practical applications, a more preferred value range is 2.5r ≤ R ≤ 4r. When this relationship is satisfied, the heat dissipation of the light-emitting chips and the system volume can be better balanced. For example, a circular light-emitting chip with r = 0.7 mm (full power load is about 12 watts, and the heat generation is about 8 watts) is selected, and a light collection device with a light exit port radius of R = 2.1 mm is set. At this time, the light collection device is not difficult to process because it is not too small. At the same time, the center distance between adjacent light-emitting chips is 2R = 4.2 mm, and this spacing can dissipate the heat of a single 8-watt chip. At this time, R = 3r, which is within the preferred range of 2.5r ≤ R ≤ 4r. When R = 2.5r, the volume is smaller. When R = 4r, the spacing between the light-emitting chips is larger, that is, the heat dissipation is better and the efficiency is higher.

[0200] This embodiment further includes a conduction lens 403, and the conduction lens 403 can converge the incident parallel light to form a focal point. The focal length of the conduction lens is F1; the conduction lens is used to receive the light exiting from the light collection device array 402. The diameter of the circumscribed circle of the light spot range where the light is incident on the surface of the conduction lens is D1, and 0.4F1 ≤ D1 ≤ 2F1, which ensures the control of the divergence angle of each beam of the exiting light. In theoretical analysis, the divergent light incident on the conduction lens 403 can be regarded as a combination of many sub-parallel light beams propagating in different directions. Each such sub-parallel light beam will converge after passing through the conduction lens 403. For example Figure 3a the light beam 321 in Figure 3bThe divergence angles of the light beams 323 and 324 are limited by 0.4F1 ≤ D1 ≤ 2F1. The larger F1 is, the smaller D1 is, and the smaller the divergence angle is; the smaller F1 is, the larger D1 is, and the larger the divergence angle is. In practical applications, since a projection lens is also required at the rear end of the optical path of the light-emitting device to receive the light emitted by the light-emitting device, a more preferred value is 0.6F1 ≤ D1 ≤ 1.2F1. The divergence angles within this range can be received by common projection lenses.

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

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

[0203] Since the angle-adjusting lens 404 is located near the focal plane of the conduction lens 403, it has basically 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, and at the same time can reduce the angle of the light emitted from the light spot 425, solving the Figure 3a and 3b problem of the angular deflection of the edge light beam caused by the enlargement of the light spot as shown.

[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 the images of the light-emitting surfaces of multiple light-emitting chips. In the embodiments of the present application, since the light spot 425 is not formed by "focusing" but by "conduction", it is called the "conduction light spot" 425. In this specification, the conduction light spot refers to the light spot at the position with the smallest size near the focal plane of the conduction lens. Preferably, the shape of the light-emitting surface of at least one light-emitting chip is circular. In this way, the conduction light spot 425 is closer to a circle, which is also the most commonly used light spot form in practice.

[0205] The above combination Figure 2 , describes the design process and basic principle of Embodiment 1. The LED light-emitting device of this embodiment uses the divergent light (only a small part is collimated light) emitted by the light collection device to be incident on the conduction lens. The conduction lens "conducts" the incident light to the vicinity of the focal plane to form a conduction light spot, and then uses the angle adjustment lens to correct the overall beam angle. Compared with the traditional light source structure, the light-emitting device of this embodiment can keep the area and angle of the light spot unchanged while greatly reducing the system volume, so that the stage light using this light source has a smaller volume and lower cost.

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

[0207]

[0208] This relationship defines a certain matching relationship between the divergence degree of the divergent light of the light collection device and the divergence angle of the sub-parallel light beam at the conduction light spot after passing through the conduction lens. When this matching relationship is satisfied, the light efficiency is higher, and the light intensity is not easily diluted, that is, the light brightness is higher.

[0209] In this embodiment, preferably, the multiple light collection devices in the light collection device array 402 are closely arranged with each other, so that the light can be made as dense as possible, and the energy density of the light can be increased while reducing the module volume. Further preferably, the light outlet of the light collection device is circular or hexagonal, or hexagonal with rounded corners, which is the most closely arranged way.

[0210] According to the above concept, the optical system of this light-emitting device was actually designed and the tracing simulation of random rays was carried out. As Figure 5 shown, in which there is a conduction lens 503 and an angle adjustment lens 504. It can be seen that the random rays do not have an obvious process of shrinking and focusing after passing through the conduction lens 503, but are directly "conducted" to the angle adjustment lens 504. The simulation process also verifies that the light spot and the light-emitting angle formed by this system are consistent with the technical concept of this solution.

[0211] InFigure 6 In Figure 4 this embodiment shown in Figure 1 is compared with the traditional light source shown in such that the size of the converging light spot 625a formed by the traditional light source is made equal to the size of the conduction light spot 625 formed by this embodiment, i.e., when light spots of the same size (i.e., basically the same luminous performance) are formed, the volume differences between the two systems are compared. It can be seen that in all directions, the volume of this embodiment is reduced by more than half, that is to say, the volume of this embodiment is only (1 / 2) 3 = 1 / 8 of that of the traditional light source.

[0212] Embodiment Two

[0213] Referring to Figure 7 , compared with Embodiment One, in this embodiment, the angle adjustment lens 704 is not placed near the focal plane of the conduction lens 703, but is moved towards the conduction lens 703. Among them, 701 is an LED array light source, and 702 is an optical collection device array.

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

[0215] At the same time, due to the earlier occurrence of the beam deviation correction effect on the beam 724, the size of the conduction light spot 725 is also correspondingly reduced. Therefore, moving the angle adjustment lens towards the conduction lens enables the angle adjustment lens to increase the beam divergence angle while reducing the light spot size, still maintaining the unchanged energy density. This situation is also allowed. However, if the angle adjustment lens is too close to the conduction lens, the angle deviation correction effect of the angle adjustment lens will become weaker and weaker, and at the same time, the converging effect on the beam itself (which becomes a diverging effect after focusing and continuing to propagate) will become stronger and stronger. Until the angle adjustment lens is completely close to the conduction lens, the angle adjustment lens completely loses its angle adjustment function.

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

[0217] It can be seen from this embodiment that by moving the angle-adjusting lens 704 towards the conduction lens 703 by a certain amount, as long as L' ≤ L is ensured, the beneficial effects of the embodiments of the present application can be achieved. At this time, the conduction light spot 725 also decreases (correspondingly, the divergence angle increases), but this decrease is not completely caused by convergence as in the traditional structure, but is an acceptable situation in the "conduction" of light. The outer diameter of the circumscribed circle of the LED array light source is M, and the outer diameter of the circumscribed circle of the smallest light spot (i.e., the conduction light spot) formed at the rear end of the optical path of the conduction lens by the light-emitting device is N. Preferably, M ≤ 2.5N. At this time, the size of the conduction light spot 725 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". Compared with the traditional focused light spot, the conduction light spot generated by conduction has a significant advantage. When the projection lens at the rear end of the optical path is zoomed, there must be a focusing process, and the light spot projected during this focusing process is in a defocused state. In practice, even in the defocused state during the focusing process, the uniformity of the light spot cannot be too poor. For traditional light sources, due to the rapid reduction of the light spot during the focusing process, in order to achieve uniformity in the defocused state, a fly-eye lens must be used, such as Figure 1 the fly-eye lens 3 in

[0218] However, in the solution of this patent, during the conduction process of light after passing through the conduction lens, the size of the light spot does not have a rapid reduction process. Therefore, even in the defocused state, its uniformity is relatively good. Therefore, a fly-eye lens can be not used, thus saving costs.

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

[0220] Embodiment Three

[0221] Compared with Embodiment One, this embodiment has the following differences:

[0222] Such as Figure 9As shown in the figure, the light-emitting device of this embodiment further includes a first fly-eye lens 805 and a second fly-eye lens 806 arranged in sequence along the optical path between the light collection device array 802 and the conduction lens 803. The first fly-eye lens 805 includes a plurality of first convex lenses arranged closely to each other, and the second fly-eye lens 806 includes a plurality of second convex lenses arranged closely to each other. The pair of fly-eye lenses is used to homogenize the incident light. Since the light-emitting device of the embodiment of the present application has the characteristic of small volume, the area of the pair of fly-eye lenses is also greatly reduced, so the cost is greatly reduced. As described above, the fly-eye lens is not necessary in the embodiment of the present application, but if used, it can further improve the uniformity. In addition, if the light-emitting chip is a multi-color chip (such as Figure 12a shown in the embodiment), then using a fly-eye lens can improve the uniformity of color mixing.

[0223] The angle adjustment lens 804 of this embodiment is a Fresnel lens. The Fresnel lens has the characteristic of being ultra-thin, and it can reduce the mechanical interference problem when using optical processing components such as diaphragms and color filters near the conduction light spot 825, making it more convenient to use. Moreover, the Fresnel lens itself also has a certain light homogenization function.

[0224] Embodiment Four

[0225] See Figure 10b , different from Embodiment Three, in this embodiment, the first fly-eye lens 905a and the second fly-eye lens 05b are integrally formed into a fly-eye lens body 905, and the first fly-eye lens 905a and the second fly-eye lens 905b are respectively two opposite surfaces of the fly-eye lens body 905. The design of the fly-eye lens body 905 is equivalent to replacing the air layer in the two independent fly-eye lenses in Figure 10a with an optical medium, which will lengthen the optical path. And the light emitted from the light collection device array 902 in the embodiment of the present application is divergent light. Since the large angle will shorten the optical path between the two fly-eye lenses, it is possible to use the fly-eye lens body 905 in this embodiment, and the fly-eye lens body 905 will not be too thick due to the too long optical path. At the same time, due to the reasons mentioned above, the fly-eye lens can be made very small, so the technical difficulty of integral forming is greatly reduced. Obviously, compared with the two discrete fly-eye lenses, the integrally formed fly-eye lens body 905 has a lower cost. Another difference between this embodiment and the embodiment shown in Figure 10a is that the angle adjustment lens 904 can also be located at the optical path rear end of the focal plane of the conduction lens, as long as it is near the focal plane of the conduction lens (near the conduction light spot 925), satisfying L≤1.5F 1， can achieve the effect of correcting the light-emitting angle.

[0226] Embodiment Five

[0227] Compared with the foregoing embodiments, the differences in this embodiment are as follows:

[0228] Referring to Figure 11 , in the foregoing embodiments, the light collection devices are all lens groups. The lens group includes two convex lenses. The light emitted by the light-emitting chip passes through the refraction of the two convex lenses in sequence and exits from the light exit of the light collection device. In this embodiment, the light collection device is a reflector cup. The reflector cup includes an incident light port and an exit light port that are opposite to each other, and a reflective inner wall between the incident light port and the exit light port. The incident light 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 is reflected and then exits from the exit light port of the reflector cup. The exit light port of the reflector cup is the exit light port of the light collection device.

[0229] For example, as shown in Figure 11 , the light ray 1021 emitted from the light-emitting chip can directly exit from the exit light port of the reflector cup, while another light ray 1022 is reflected and exits after being incident on the reflective inner wall. Due to its own limitations, it is difficult for the reflector cup to generate collimated light (because there is directly emitted light, such as 1021, and this part of the light cannot be collimated and emitted without being processed). In the embodiments of the present application, exactly divergent light is required to be emitted from the light collection device array 1002. At this time, the reflector cup can be used as the light collection device. Another difference from the Figure 10b shown embodiment is that the conduction lens 1003 in this embodiment is also a Fresnel lens, so that the space between the conduction lens 1003 and the angle adjustment lens 1004 is larger, which is more convenient for placing other optical processing elements.

[0230] In the application of stage lighting, colored lights are a common requirement. Of course, colors can be achieved by passing white light through color filters, but the number of colors that can be achieved is limited by the number of color filters. It is best to use light-emitting chips of different colors at the light source end and be able to mix well. In another embodiment of the embodiments of the present application, the light-emitting chip shown in Figure 12a is used. The light-emitting chip is formed by splicing four LED sub-chips 1151, 1152, 1153, and 1154. The four LED sub-chips are arranged in a tic-tac-toe pattern. In the figure, R represents red, G represents green, B represents blue, and W represents white. In this way, by separately controlling the LED sub-chips of different colors, different colors of the emitted light spot can be achieved. In fact, as long as the light-emitting chip is formed by splicing at least two LED sub-chips with different light-emitting colors, the purpose of the embodiments of the present application can be achieved. Preferably, when such multi-color LEDs form an array, at least part of them are arranged in Figure 12bThey are arranged in such a way that among the LED array light sources, at least two light-emitting chips include LED sub-chips of the same color, and the placement orientations of these two LED sub-chips of the same color in their respective light-emitting chips are different. For example, for the red LED sub-chips, in the upper-left light-emitting chip, it is located in the upper-left corner; in the upper-right light-emitting chip, it is located in the upper-right corner; in the lower-left light-emitting chip, it is located in the lower-left corner; and in the lower-right light-emitting chip, it is located in the lower-right corner. This 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 combination with an angle-adjusting lens. The light-emitting device has the advantages of small volume and low cost, and good optical effects can be achieved as long as it is combined with an angle-adjusting lens at the usage end.

[0232] Embodiment Six

[0233] Compared with the foregoing embodiments, the difference in this embodiment is:

[0234] The lamp includes the above-mentioned light-emitting device, and also includes a pattern diaphragm 1412 near the angle-adjusting lens 1404. The pattern diaphragm 1412 can be at the front end or the rear end of the optical path of the angle-adjusting lens 1404 (in this embodiment, it is a Fresnel lens). Figure 14 The situation where the pattern diaphragm is located at the rear end of the optical path of the angle-adjusting lens is shown). The pattern diaphragm 1412 includes a light-transmitting area 1412a with a pattern. The lamp also includes a projection lens 1413, which is used to project the pattern of the light-transmitting area 1412a of the pattern diaphragm onto the far field. The distance between the pattern diaphragm 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 conduction lens 1403. According to the previous embodiments, the angle-adjusting lens can be located at the front end of the optical path of the conduction light spot or at the rear end of the optical path of the conduction light spot. The distance between the angle-adjusting lens and the conduction light spot is generally less than half of F1. In practice, since the conduction light spot is the light spot with the smallest area in the optical path, its brightness is also the highest. Therefore, the pattern diaphragm 1412 is preferably placed at the position of the conduction light spot. Therefore, the distance between the pattern diaphragm 1412 and the vertex of the light-emitting surface of the angle-adjusting lens 1404 being less than half of F1 can ensure that the brightness of the light at the pattern diaphragm 1412 is as high as possible, and thus the brightness of the pattern light projected onto the far field through the projection lens 1413 is also as high as possible.

[0235] In this embodiment, it further includes a dimming device 1411 located between the conduction lens 1403 and the angle adjustment lens 1404, which is used to adjust the color, color temperature, angular distribution or surface distribution of light. For example, the dimming device 1411 is a CMY filter. The CMY filter has a light-transmitting area, which includes a colorless transparent area and a color area. The colorless transparent area and the color area are mixed with each other, and the area ratio of the colorless transparent area to the color area is different in at least two sub-areas within the light-transmitting area. In this way, a gradient color can be achieved by placing different positions within the light-transmitting area in the light path. Since the dimming device 1411 is located between the conduction lens 1403 and the angle adjustment lens 1404, the projection lens 1413 does not image it, so the color mixing of the colorless transparent area and the color area within the light-transmitting area is naturally achieved. In addition to the CMY filter achieving the control and change of color, the dimming device 1411 can include multiple components to achieve the control of other optical effects such as angular distribution and surface distribution.

[0236] Embodiment Seven

[0237] Compared with the foregoing embodiments, the difference in this embodiment is:

[0238] In the following description, the optical axis direction of the light-emitting direction of the light-emitting device is defined as the Z direction, the direction with 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 main plane. The +Z direction is the direction along the Z direction that is consistent with the light-emitting direction of the light-emitting device; the -Z direction is the direction along the Z direction that is opposite to the light-emitting direction of the light-emitting device.

[0239] The light-emitting device includes at least two LED units, and the at least two LED units are closely arranged with each other 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 reflecting sheets. The light-emitting chip is quadrilateral or hexagonal, the light-emitting surface of the light-emitting chip is parallel to the main plane, and each side of the light-emitting chip (hereinafter simply referred to as the LED side) corresponds to a reflecting sheet one by one; the multiple reflecting sheets are adjacent to each other to form a unit light channel, and the light-emitting surface of the LED unit array is formed by the unit light channels of at least two LED units closely arranged.

[0240] The following combines the attached Figure 15a 、 Figure 15b and Figure 15c to illustrate the positional relationship between one side of a light-emitting chip and a reflecting sheet that correspond to each other. In Figure 15a 、 Figure 15b and Figure 15c , the light-emitting chip 101 is quadrilateral. In one embodiment, the light-emitting chip 101 can be a regular quadrilateral, and one of its sides is 101a. The reflecting sheet corresponding to the LED side 101a is the reflecting sheet 102a. The reflecting sheet 102a is in the Z direction ( Figure 15aand Figure 15c It is bent in a parabolic trajectory on the (where there is a mark) and faces the side 101a, and the reflector 102a is congruent in the direction along the LED side 101a. In other words, the line segments obtained by the intersection of the reflector 102a with any first plane are congruent, that is, the intersecting line segments are all the same parabolic segments; a plurality of the first planes are arranged along the LED side 101a, and each first plane is perpendicular to the LED side 101a and parallel to the Z direction. Among them, the focus of the parabola coincides with the LED side 101a, and the angle between the axis 141 of the parabola and the Z direction is A. In one embodiment, A < 45 degrees. Observe three rays 121a, 122a, and 123a emitted from the LED side 101a facing the reflector 102a. Since the reflector 102a is congruent in the direction along the LED side 101a and the focus of the parabola coincides with the LED side 101a; in other words, the reflector 102a is congruent to the intersecting line segments (parabolic segments) on any first plane perpendicular to the LED side 101a, and the focus of the parabolic segments coincides with the LED side 101a. According to the definition of a parabola, these three rays 121a, 122a, and 123a will be emitted along the direction of the axis 141 of the parabola after being reflected by the reflector, that is, the reflected rays 121a, 122a, and 123a form an angle A with the Z direction. It can be judged that all the rays incident on the reflector 102a emitted from the LED side 101a will be reflected by the reflector 102a and emitted along the direction of the axis 141. On this basis, observe an arbitrary light-emitting point 101x inside the light-emitting surface of the light-emitting chip that is not on the LED side 101a. The ray 122x emitted from the light-emitting point 101x and the ray 122a are incident on the same position on the reflector 102a. According to geometric optics, the angle between the emitted direction of the ray 122x after being reflected by the reflector and the Z direction must be less than A. By generalization, the angle between the emitted direction of any ray incident on the reflector 102a from the light-emitting point 101x and the Z direction after being reflected by the reflector 102a is less than A. By further generalization, the angle between the emitted direction of any ray incident on the reflector 102a from any point on the light-emitting surface of the light-emitting chip and the Z direction after being reflected by the reflector 102a is less than or equal to A.

[0241] For any corresponding LED side and reflector, the above position relationship is satisfied. Figure 15b is Figure 15a a perspective view of the illustrated embodiment, where 103 represents the heat-conducting substrate of the LED unit, and the heat-conducting substrate 103 is larger than the light-emitting surface of the light-emitting chip 101; Figure 15c is Figure 15a a top view of the illustrated embodiment, in Figure 15c which the Z direction is perpendicular to the paper surface and exits. Refer to Figure 15a 、Figure 15b and Figure 15c , the positional relationships between several other LED sides and the reflective sheet in the LED unit can be explained. The LED side 101b and the reflective sheet 102b are in a corresponding relationship, the LED side 101c and the reflective sheet 102c are in a corresponding relationship, and the LED side 101d and the reflective sheet 102d are in a corresponding relationship. According to the working principle of the LED side 101a and the reflective sheet 102a in the above text, the angles between the outgoing directions of the light incident on the reflective sheets 102a, 102b, 102c, and 102d from any point on the light-emitting surface of the light-emitting chip and the Z direction after being reflected by these four reflective sheets 102a, 102b, 102c, and 102d are all less than or equal to A. Also, since multiple reflective sheets 102a, 102b, 102c, and 102d are adjacent to each other to form a unit light channel 102 (as shown in Figure 15b ), the angles between the outgoing directions of the light incident on the inner wall of the light channel 102 from the light-emitting chip 101 and reflected and the Z direction are all less than or equal to A. Therefore, for Figure 15a , Figure 15b and Figure 15c shown in an LED unit, by setting the unit light channel 102, the light emitted by the light-emitting chip can be collected in a reflective manner, and it can be ensured that the outgoing angle of the light exiting from the unit light channel 102 is 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 in different directions by the light-emitting chip 101 overlaps again at the light exit of the unit light channel 102 after being reflected by different unit light channels 102. Therefore, the light at the light exit 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 above-mentioned LED units. The at least four LED units are closely arranged to form an LED unit array, and the light-emitting surface of the LED unit array is formed by closely arranging the unit light channels of at least four LED units. Taking nine LED units arranged in a 3x3 manner to form an LED unit array as an example, the three-dimensional view of the nine LED units is as shown in Figure 16 , and it can be seen that each LED unit is as shown in Figure 15b . Since the reflective sheet is congruent along the direction of its corresponding LED side, the side walls of the nine LED units can be closely adjacent and spliced. Since each LED unit can emit light with an outgoing angle less than or equal to A, and since the light distribution at the light exit of the unit light channel of each LED unit is relatively uniform, the light distribution at the spliced light exit is also relatively uniform. The contour shape of the spliced light-emitting surface is determined by the splicing method of multiple LED units. For example, in Figure 16In the illustrated embodiment, the contour shape of the light-emitting surface after splicing is a regular quadrilateral (the dotted line 204 in the figure represents this contour shape). Of course, there is no light at the splicing joint. Due to the certain thickness of the reflective sheet, the splicing joints between the LED units are inevitable, so absolute uniformity cannot be achieved.

[0243] Therefore, in one implementation, as Figure 17 shown, it further includes a plurality of reflective planes 305a, 305b, 305c, 305d parallel to the Z direction. These reflective planes are adjacent to each other to form a total light channel 305. The cross-sectional shape 304 of the total light channel 303 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 in close contact with the light-emitting surface of the LED unit array and receives the emitted light of the LED unit array. Since the plurality of reflective planes 305a, 305b, 305c, 305d are parallel to the Z direction, the total light channel 305 formed by their adjacency is a light channel parallel to the Z direction. The light incident on the light channel from the light-emitting surface of the LED unit array is reflected by the plurality of reflective planes 305a, 305b, 305c, 305d, and the total emission angle remains unchanged, still with an angle with the Z direction less than or equal to A. At the same time, due to the effect of multiple reflections, the light becomes completely uniform at the light outlet of the total light channel 305, and the dark lines caused at the splicing joints of the light-emitting surface of the LED unit array are eliminated. Finally, since 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, 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, at the light outlet of the total light channel 305, an emitted light with a uniform light distribution and an emission angle less than or equal to A is formed. At the same time, compared with the traditional light-emitting device based on a compound eye lens, instead of using a lens, a cheap reflective sheet is used to control the light, so the cost is greatly reduced. Moreover, in the traditional light-emitting device based on a compound eye lens, since the lens is transmissive, according to optical knowledge, any refraction of light will cause dispersion, which is determined by the material of the lens. However, there is no dispersion in the reflection on the reflective sheet, and the emitted light of the light-emitting device also has the advantage of no dispersion.

[0245] In one implementation of this embodiment, as Figure 15a 、 Figure 15b and Figure 15c shown, the edge of the reflective sheet in the -Z direction is called the lower edge. In at least one pair of corresponding relationships between the LED sides and the reflective sheet, the lower edge of the reflective sheet is in contact with the opposite side of the corresponding side. For example, in Figure 15aIn [the figure], side 101a corresponds to reflector 102a, and the lower edge of reflector 102a is in contact with the opposite side 101b of side 101a. The advantage of this is that, on the premise of not affecting the aforementioned working principle and achieving an angle of reflected light less than or equal to A, the areas of the light incident port and the light output port of the unit light channel are minimized, thus ensuring the energy density to the greatest extent. By the same token, side 101b corresponds to reflector 102b, and the lower edge of reflector 102b is in contact with the opposite side 101a of side 101b; side 101c corresponds to reflector 102c, and the lower edge of reflector 102c is in contact with the opposite side 101d of side 101c; side 101d corresponds to reflector 102d, and the lower edge of reflector 102d is in contact with the opposite side 101c of side 101d, that is, the lower edge of each reflector of the unit light channel is in contact with the opposite side of the corresponding side. In this way, the light incident port of the entire unit light channel is close to the light emitting surface of the unit, the energy density can be ensured to the greatest extent, and at the same time, the uniformity of the light output port of the unit light channel is also the best. Of course, even if the lower edge of the reflector is not in contact with the opposite side of the corresponding LED side, that is, there is a gap between the two, it does not affect the working principle and beneficial effects of the aforementioned reflector.

[0246] In an implementation manner of this embodiment, as Figure 15a 、 Figure 15b and Figure 15c, as shown in the figure, the edge of the reflector in the +Z direction is called the upper edge. In the correspondence relationship between at least one pair of LED edges and the reflector, the angle between the line connecting the LED edge to the upper edge of the reflector and the Z direction is A. For example, LED edge 101a corresponds to reflector 102a, and the angle between the line 142 connecting LED edge 101a to the upper edge of reflector 102a and the Z direction is A. This actually defines the height of reflector 102a in the Z direction. As mentioned before, the emission angle of the light incident on reflector 102a from the light-emitting chip after being reflected by reflector 102a is less than or equal to A with respect to the Z direction; and the angle between the line 142 connecting LED edge 101a to the upper edge of reflector 102a and the Z direction is A, which ensures that among all the light emitted from LED edge 101a, all the light with an angle less than or equal to A with respect to the Z direction can be directly emitted, while the remaining light with an angle greater than A with respect to the Z direction is incident on reflector 102a and the emission angle after reflection is less than or equal to A. In this way, for all the light emitted from LED edge 101a, whether it is incident on reflector 102a or not, the emission angle with respect to the Z direction is less than or equal to A. Considering any point 101x on the light-emitting chip, the angle between the line connecting this point 101x to the upper edge of reflector 102a and the Z direction is less than A. Therefore, for the light emitted from any point on the light-emitting chip, whether it is incident on reflector 102a or not, the emission angle with respect to the Z direction is less than or equal to A. In this way, the angles of all the light emitted from the light-emitting chip are completely controlled, that is, completely within the angle range less than or equal to A. In this way, the subsequent lens design (or rather, the corresponding lens design in the light-emitting direction of the optical path) will become simple and more efficient. 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 aforementioned reflector. Since A is less than 45 degrees, the light-receiving half-angle of the subsequent optical system (or rather, the corresponding optical system in the light-emitting direction of the optical path) only needs to be less than 45 degrees, which is beneficial and low-cost for the design of the optical system.

[0247] In an implementation manner of this embodiment, at least one of the reflection planes 305a or 305b or 305c or 305d and the reflector in close contact with it are integrally formed. In this way, at least in this part, the total light channel is in close contact with the light-emitting surface of the LED unit array without gaps, improving the light transmission efficiency and the uniformity of light emission.

[0248] Figure 18a represents Figure 17 The schematic diagram of the optical path structure of a stage light applying the light-emitting device shown. The stage light includes a light-emitting device 451, and this light-emitting device is as Figure 17The light-emitting device shown, the stage light further includes a pattern diaphragm 452 and projection lens groups 453 and 454. In practical applications, in some cases, only one projection lens can also be used to achieve the function of the projection lens group, and the projection lens is used to refer to a single projection lens and a multi-lens projection lens group. The pattern diaphragm 452 is located behind the optical path of the total light channel 405 of the light-emitting device 451 (that is, Figure 17 the total light channel 305 shown), behind the optical path (that is, in the light-emitting direction of the optical path (+Z direction), the light-emitting device 451 and the pattern diaphragm 452 are arranged in sequence), and the focal plane of the projection lens coincides with the plane where the pattern diaphragm 452 is located, so that the light emitted by the light-emitting device 451 can illuminate the pattern on the pattern diaphragm 452. Since the light-emitting port of the total light channel of the light-emitting device 451 has a uniform light distribution, and the angles of the emitted light are all less than or equal to A, this is equivalent to the pattern on the pattern diaphragm having a uniform light distribution, and at the same time emitting light with an angle less than or equal to A (that is, the full angle 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 diaphragm 452 is located, the pattern of the pattern diaphragm can be projected into the distance by the projection lens to form a uniform pattern 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 is Figure 18a a side view of the light-emitting device 451 and the pattern diaphragm 452 as seen from the right side (that is, from the -Z direction or the direction opposite to the optical path). As Figure 18b shown, in this embodiment, the pattern diaphragm 452 can also simultaneously serve as a reflection diaphragm 452 covering the light-emitting port of the total light channel 405. The reflection diaphragm 452 is divided into a light-reflecting area 452b and a light-transmitting area 452a, and the side of the light-reflecting area 452b facing the total light channel 405 has reflectivity; among the light emitted from the light-emitting port of the total light channel 405, the part incident on the light-transmitting area 452a can pass through the reflection diaphragm 452 and be emitted, and the part incident on the light-reflecting area 452b is reflected by the light-reflecting area and at least partially returns to the total light channel 405 and propagates inward. This part of the reflected light will pass through the total light channel and the unit light channel and finally be incident on the surface of the light-emitting chip. The light-emitting chip itself has reflectivity, so this part of the light will be reflected by the light-emitting chip again, equivalent to being emitted again from the light-emitting chip, and finally be emitted from the light-emitting port of the total light channel. Most of it can be emitted from the light-transmitting area 452a. Therefore, the reflected light of the light-reflecting area 452b is not wasted, but most of it can be reused, equivalent to this part of the light being recycled. Figure 18c illustrates this light recycling mechanism. In Figure 18cAmong them, the emitted light 421 is reflected by the reflective area of the reflection diaphragm 452 and finally enters the light-emitting chip 401, and then emits again from the light-emitting chip 401 to form the emitted light ray 422. This light recycling mechanism can reduce energy loss and improve efficiency while forming the patterned light. In this embodiment, the light-transmitting area is circular. Of course, the light-transmitting area can also be of other shapes, which can be fully realized according to actual needs. In practical applications, the reflection diaphragm can also be independent of the pattern diaphragm, and even the pattern diaphragm and the reflection diaphragm can be used simultaneously. For example, a reflection diaphragm covering the light outlet of the total light channel is used to form a circular light outlet shape, and a rotatable pattern diaphragm located at the rear end of the optical path of the reflection diaphragm is used at the same time. That is to say, the light-emitting device, the reflection diaphragm, and the pattern diaphragm are arranged in sequence according to the light-emitting direction (+Z direction) of the optical path. The pattern diaphragm has multiple patterns along the circumferential direction, and the patterns can be switched as the pattern diaphragm rotates.

[0250] In the foregoing embodiment, the LED units are arranged closely to form an LED unit array. There must be closely contacted reflective sheets between adjacent LED units. As described above, since the reflective sheet itself has a thickness, the joint between adjacent LED units formed here does not emit light, thus destroying the uniformity of the light-emitting surface of the LED unit array. In the foregoing embodiment, a reflective plane and the total light channel composed of the reflective plane are used to solve this non-uniformity problem, but the cost is that the height of the light-emitting device becomes higher. In the following embodiment, this problem will be optimized.

[0251] The structural schematic diagram of the light-emitting device of another embodiment is as Figure 19b shown, and its partial enlarged view is as Figure 19a shown. This embodiment and Figure 17The embodiment shown has two differences. First, in this embodiment, the edge of the reflective sheet in the +Z direction is called the upper edge; there is also a reflective tip 507, which is located at the upper edge seam of two reflective sheets 502a and 506a of two adjacent LED units and covers this seam (in other words, the reflective tip 507 is located at the upper edge seam of two reflective sheets and covers this seam, where these two reflective sheets (see 502a and 506a in the figure) are the two reflective sheets closest to each other on two adjacent LED units, and the upper edges of the two reflective sheets are parallel to each other). The side of the reflective tip 507 in contact with the upper edge seam of the reflective sheet is called the wide end 507a, and the other end of the reflective tip 507 is called the tip 507b. The tip 507b is 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 has reflectivity. It can be understood that the reflective surface of the reflective tip 507 is a continuation of the reflective surfaces of the two reflective sheets 502a and 506a, which can effectively and greatly reduce the width of the gap, so that the length of the total light channel can be greatly reduced. Second, in this embodiment, 25 LED units are used, and they are closely arranged in a 5x5 manner to form an LED unit array.

[0252] In the foregoing embodiments, a quadrilateral light-emitting chip is used as an example of the embodiment. In fact, a hexagonal light-emitting chip can also be used to implement it. The schematic diagram of an LED unit using a hexagonal light-emitting chip and its reflective sheet is as Figure 20a shown. It can be understood that six reflective sheets corresponding to the six sides of the light-emitting chip respectively 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, there are seven LED units, and these seven LED units are closely arranged in a honeycomb shape to form an LED unit array, and the light-emitting surface of this LED unit array is also honeycomb-shaped, as Figure 20b shown. Figure 20b In the embodiment shown, the total light channel is not drawn. Compared with the foregoing quadrilateral light-emitting surface, such a honeycomb-shaped light-emitting surface is closer to a circle. Therefore, when using the most common circular pattern diaphragm to form a circular pattern light, the light loss is smaller and the efficiency is higher.

[0253] For different arrangements of LED units, in addition to Figure 17 the square array arrangement of the embodiment shown and Figure 20b the honeycomb arrangement shown, there can actually be other arrangements in practice. This will be described in the following embodiments.

[0254] In another embodiment, the schematic structural diagram of the light-emitting device is as Figure 21As shown. Different from the foregoing embodiments, the light-emitting device in this embodiment includes at least three LED units, and the at least three LED units are closely arranged linearly with each other to form an LED linear array; the LED linear array includes a light-emitting surface. Each LED unit includes a light-emitting chip and a plurality of reflecting sheets. The light-emitting chip is quadrilateral, the light-emitting surface of the light-emitting chip is parallel to the main plane, and each side of the light-emitting chip corresponds to a reflecting sheet one by one; the plurality of reflecting sheets are adjacent to each other to form a unit light channel, and the light-emitting surface of the LED linear array is formed by closely arranging the unit light channels of at least three LED units linearly. Specifically, in this embodiment, there are six LED units 751, 752, 753, 754, 755, and 756, which are closely arranged linearly in sequence. Among these LED units, there are also four reflecting planes parallel to the Z direction ( Figure 21 not shown in the figure), and the four reflecting 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 of the LED linear array; the light-emitting port of the total light channel is rectangular.

[0255] Different from the foregoing embodiments, the shape of the light-emitting surface of the light-emitting device in this embodiment is strip-shaped, which is an effect that cannot be achieved by the traditional compound-eye lens-based light-emitting device described in the background art. The schematic diagram of the optical path structure of the light-emitting device applied to a stage light in an actual system is as shown in Figure 22 Figure. The stage light further includes projection lens groups 852 and 853 for projecting the strip-shaped light-emitting port of the light-emitting device into the far field to form a strip-shaped high-brightness light spot. This is required in the actual application of stage lights. In the traditional technology, this requirement can only be achieved by using lasers. The light-emitting device in any embodiment can use an LED light source (such as a light-emitting chip), which has the characteristic of uniform light emission, lower cost and better human eye safety. The longer the length of the required strip-shaped light spot is, the more LED units are required, and the longer the long side length of the total light channel 805 of the light-emitting device 851 is. However, due to the aberration problem of the imaging lens, if the long side of the light-emitting port of the total light channel 805 is straight, then its edge cannot be imaged well by the projection lens group. To solve this problem, in this embodiment, the length of the reflecting plane forming the total light channel in the Z direction is called its height, and the height Hc in the middle of the two long sides of the rectangle forming the light-emitting port of the total light channel is less than the height He at both ends thereof. 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 focus of the projection lens group on its central axis coincides with the middle of the long side direction of the light-emitting port of the total light channel of the light-emitting device, then both the middle and the edge of the long side of the light-emitting port of the total light channel can be clearly imaged by the projection lens group.

[0256] Using Figure 22 The stage light of the embodiment shown can form a high-brightness bar-shaped uniform light spot in the far field. However, due to the limitation of the principle, it can only be of a single color. In actual requirements, there is a need for a multi-color switchable bar-shaped light spot. Therefore, in one implementation, the stage light includes at least two such as Figure 21 the described light-emitting device ( Figure 21 the total light channel is not drawn in the figure), and the two light-emitting devices are arranged side by side along the short side direction of the light outlet of their total light channel; the two light-emitting devices have different light-emitting colors or different color temperatures of the white light emitted. The two bar-shaped uniform light bands formed by the same projection lens group in the far field by the two light-emitting devices, as shown by 981 and 982 in Figure 23 The positional relationship of the two bar-shaped uniform light bands is arranged side by side along the short side direction. The two light bands have different colors or different color temperatures, so that different colors or color temperatures can be realized by lighting different light-emitting devices as needed in the stage light.

[0257] In the foregoing embodiment, the light emitted by the light-emitting device is divergent, and the light outlet of the light-emitting device is the position where the light distribution is the most uniform and the light energy density is the highest. This will bring a problem that the distance between the light-emitting device and the projection lens (group) is relatively small, thus limiting the increase of the functions of the stage light. For example, for a stage light, many lighting effects are required, and these lighting effects rely on optical devices between the light-emitting device and the projection lens (group) to be realized, such as prisms, color filters, etc. These devices themselves need mechanical actions such as rotation and switching to work, so a relatively large physical space is required.

[0258] To solve this problem, another embodiment is also proposed, and its structural schematic diagram is as shown in Figure 24a In this embodiment, it includes at least four LED units, and the four LED units are closely arranged with each other 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 a plurality of reflector sheets. The light-emitting chip is quadrilateral or hexagonal, the light-emitting surface of the light-emitting chip is parallel to the main plane, and each side of the light-emitting chip corresponds to a reflector sheet one by one. The plurality of reflector sheets are adjacent to each other to form a unit light channel, and the light-emitting surface of the LED unit array is formed by the unit light channels of at least four LED units being closely arranged. In the corresponding relationship between one side of any of the light-emitting chips and the reflector sheet, the reflector sheet is bent in a parabolic trajectory in the Z direction and faces the LED side, and the reflector sheet is congruent in the direction along the LED side; wherein, the focus of the parabola coincides with the LED side, and the axis of the parabola forms an angle A with the Z direction. Different from the embodiment shown in Figure 17 There are three points of difference.

[0259] First, the light-emitting device of this embodiment further includes a conductive lens 1012 located at the optical path rear end of the LED unit array 1011 (that is, the LED unit array 1011 and the conductive lens 1012 are arranged in sequence along the +Z direction). The conductive lens 1012 is used to receive the light emitted from the light-emitting surface of the LED unit array 1011 (taking the light ray 1021 as an example) and converge it on a second plane, that is, a plane located at the optical path rear end of the conductive 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 the light ray 1021 as an example) is converged on the second plane after passing through the conductive lens 1012. According to the explanation of the working principle of the reflective sheet and the LED unit in the above text, Figure 15a all the light emitted from the LED side 101a becomes light emitted along the A direction after being reflected by the reflective sheet 102a (the A direction here refers to the direction deviating from the angle A on the right side of the +Z direction in Figure 15a see the A direction 152 in the figure), and all the light emitted from the LED side 101b becomes light emitted along the A direction after being reflected by the reflective sheet 102b (the A direction here refers to the direction deviating from the angle A on the left side of the +Z direction in Figure 15a see the A direction 152' in the figure). And for the light emitted from any point 101x on the light-emitting chip, whether it is incident on the reflective sheet 102a or the reflective sheet 102b, it is equivalent to the light emitted from a certain point deviating from the focus of the parabola. Then most of the reflected light is concentrated near a specific angle smaller than A. Therefore, it can be judged that the function of the unit optical channel is to roughly transform the surface distribution of the light-emitting chip into the angular distribution of the emitted light. And since the surface distribution of the light-emitting chip is basically uniform, the angular distribution of the light emitted from the unit optical channel is also basically uniform. Combining the previous description, that is to say, the surface distribution and the angular distribution of the light emitted from the unit optical channel are both basically uniform, which is jointly determined by the characteristics of the light-emitting chip and the characteristics of the unit optical channel.

[0260] Next, the working principle of the conductive lens will be explained in combination with Figure 24b In order to express the angle of the light incident on the conductive lens 1012, in Figure 24b the LED unit array 1011 and the conductive lens are deliberately separated by a certain distance. In reality, this distance can be non-existent. Examine a beam of light 1022 emitted from the edge of the LED unit array. It has a certain divergence half-angle A and is incident on 1012. In Figure 24bThree rays are used to represent different angles of the light beam 1022. The bending ability of the conducting lens 1012 for any ray is the same. That is to say, the three rays of the light beam 1022 have the same twisting angle after passing through the conducting lens 1012. Therefore, a light spot 1024 with a certain width is formed when it is incident on the P plane. The upper edge of the light spot 1024 corresponds to the ray with the uppermost angle of the light beam 1022, the lower edge of the light spot 1024 corresponds to the ray with the lowermost angle of the light beam 1022, and the center of the light spot 1024 corresponds to the ray with the central angle of the light beam 1022. Thus, it can be seen that the angular distribution of the light beam 1022 becomes a surface distribution on the P plane after passing through the conducting lens 1012. Then, consider the light beam 1023 emitted from a position near the middle of the LED unit array. Similar to the light beam 1022, the light beam 1023 also forms a light spot that coincides with the light spot 1024 on the P plane after passing through the conducting lens 1012, and the surface distribution of this light spot is also equivalent to the angular distribution of the light beam 1023. Therefore, the function of the conducting lens 1012 is to convert the surface distribution of the 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 the 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 light emitted from each LED unit is basically uniform, the converging light spot formed on the P plane after the convergence of the conducting lens 1012 is also basically uniform. At the same time, the converging light beam starts to diverge after passing through the P plane, and the divergence angle is determined by the surface shape of the conducting lens 1012. Therefore, different numerical ranges of the divergence angle can be realized according to needs.

[0262] Second, this embodiment does not necessarily include Figure 17 the total light channel in the Figure 17 illustrated embodiment. Because in the

[0263] illustrated embodiment, the purpose of setting the total light channel is to eliminate the influence of the seams between the LED units (i.e., the dark line influence caused by non-light emission at the seams), so as to achieve a uniform surface distribution on the light-emitting surface of the total light channel. As described above, in this embodiment, the surface distribution of the light energy on the P plane is not affected by the seams between the LED units, but is determined by the light-emitting angular distribution of the LED units. Therefore, the total light channel is not necessarily required in this embodiment. Of course, using the total 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 converging light, which is also helpful for the light-emitting quality of the stage light. Therefore, it may also be used in actual 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 be less than 20 degrees. This is because to achieve a good light converging effect of the conducting lens, the divergence angle of the incident light should be relatively small. Through repeated practice, it is concluded that A less than 20 degrees is a relatively good range in practice and can achieve good results.

[0264] In one embodiment, the light-emitting device further includes a plurality of reflection planes parallel to the Z direction and located between the optical paths of the LED light source array 1011 and the conduction lens 1012. The plurality of reflection planes are adjacent to each other to form a total light channel (not shown in the figure, reference can be made to the foregoing embodiments and the corresponding drawings, 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 in close contact with 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 is formed, and at the same time, light with a certain controllable angular distribution is obtained. Figure 25a Shows the optical path schematic diagram of a stage light made of the Figure 24a light-emitting device, including the light-emitting device 1119, and further including a pattern diaphragm 1156 and projection lenses 1153 and 1154. The pattern diaphragm 1156 is located near the P plane of the light-emitting device 1119 (that is, the pattern diaphragm 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 pattern diaphragm 1156 is located. The uniform light spot formed by the light-emitting device 1119 on the P plane illuminates the pattern diaphragm, and after passing through the pattern projected on the pattern diaphragm, it exits, which is equivalent to emitting uniform light with a certain angular range from the pattern of the pattern diaphragm. This pattern is projected by the projection lens group into the far field to form pattern light.

[0266] Figure 25a The light source 1119 in Figure 24a is different from the light source shown in Figure 25a In the light-emitting device 1119 in Figure 24bAs shown. The reflective diaphragm 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; among the light emitted from the light-emitting surface of the LED unit array, the part incident on the light-transmitting area 1109a can pass through the reflective diaphragm and be emitted, and the part 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 part of the reflected light will be emitted again from the light-transmitting area 1109a after the effect of light recycling. The principle has been described before and will not be elaborated 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 conducting lens 1119. Since the 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 before, 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 contour of this surface distribution is quadrilateral. Therefore, the light-emitting angular distribution of this light-emitting device 1119 should also be a light cone in the shape of a quadrangular pyramid. 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 reflective diaphragm 1109 is used to make the light at the light-emitting port of the LED unit array 1101 circular. The reflected light will be reused due to the effect of light recycling, and the finally emitted light will be efficiently incident on the projection lens. This is equivalent to the light at the original wasted four corners being partially utilized now through the placement of the reflective diaphragm 1109 and the effect of light recycling, thereby improving the efficiency. Of course, the light-transmitting area of the reflective diaphragm 1109 may not be circular, which can be designed according to the actual situation.

[0267] In this embodiment, the pattern diaphragm 1156 has a plurality of patterns distributed along its circumferential direction, and also includes a motor. The position of the pattern diaphragm on the optical path can be controlled by the motor, so as to control which pattern on the pattern diaphragm is projected onto the far field to form a pattern light.

[0268] In another embodiment, the light-emitting device includes at least four LED units. Among them, at least four LED units include at least one first LED unit, and the light-emitting color of this first LED unit is different from that of other LED units; or among at least four LED units, at least one second LED unit is included, and the color temperature of the white light emitted by this second LED unit is different from that of the white light emitted by other LED units. Refer to Figure 24bFor the content thereof and the explanatory description, the light of different LED units forms light spots on the P plane after passing through the conduction lens. The light spots formed by different LED units are theoretically coincident. Therefore, if the colors or color temperatures of different LED units are different, they will be mixed on the P plane to form a uniform mixed light spot. The advantage of this is that the brightness can be controlled by controlling the driving current of different LED units, thereby changing the color or color temperature of the light. It is also possible to turn different LED units on or off to achieve the purpose of controlling the color of the emitted light.

[0269] In summary, a light-emitting device includes at least two LED units, and the at least two LED units are closely arranged with each other to form an LED unit array; the LED unit array includes a light-emitting surface; each of the LED units includes a light-emitting chip and a plurality of reflector sheets. 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 corresponds to a reflector sheet one by one; the plurality of reflector sheets are adjacent to each other to form a unit light channel, and the light-emitting surface of the LED unit array is formed by the unit light channels of the at least two LED units being closely arranged; in the corresponding relationship between one side of any one of the light-emitting chips and the reflector sheet, the reflector sheet is bent in a parabolic trajectory in the Z direction and faces the LED side, and the reflector sheet is congruent in the direction along the LED side (in other words, the line segments obtained by the reflector sheet intersecting with any first plane are congruent. The plurality of first planes are arranged along the LED side, and each first plane is perpendicular to the LED side and parallel to the Z direction); wherein, the focus of the parabola coincides with the LED side, and the included angle between the axis of the parabola and the Z direction is A, and A < 45 degrees.

[0270] In one embodiment, the light-emitting device includes at least four of the LED units, and further includes a plurality of reflection planes parallel to the Z direction. The plurality of reflection 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 of the LED unit array.

[0271] Embodiment Eight

[0272] Compared with the foregoing embodiments, the difference in this embodiment is:

[0273] Referring to Figure 26 , in this embodiment, three LED array light sources 1501a, 1501b, 1501c and corresponding three light collection device arrays 1502a, 1502b, 1502c are adopted.

[0274] The colors of these three LED array light sources are different from each other. For example, the LED array light source 1501a uses red light-emitting chips (which may also include, but are not limited to, light-emitting chips of colors such as orange or amber), the LED array light source 1501b uses green light-emitting chips (which may also include, but are not limited to, light-emitting chips of colors such as yellowish-green or yellow), and the LED array light source 1501c uses blue light-emitting chips (which may also include, but are not limited to, light-emitting chips of colors such as purple or cyan).

[0275] The light emitted by the three LED array light sources is collected by their respective light collection device arrays and then exits. It also includes beam splitters 1591 and 1592. The function of the beam splitters is to reflect light of a certain wavelength band while transmitting light of other wavelength bands, and the wavelength bands of the light they reflect and transmit can be set during the design of the beam splitters. By using the beam splitters, light of different colors can be coupled together and exit, so that light of different colors multiplex the same optical channel, thereby improving the brightness.

[0276] Specifically, in this embodiment, for example, the beam splitter 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 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, by arranging the beam splitters 1591 and 1592 in a crossed orientation, 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 can be guided to be combined into a beam and exit to the guiding lens 1503 and then exit.

[0277] A lighting fixture includes the above-mentioned light-emitting device, and also includes a pattern diaphragm and a projection lens. The pattern diaphragm is located behind the optical path of the total optical channel of the light-emitting device, and the focal plane of the projection lens coincides with the plane where the pattern diaphragm is located.

[0278] In one embodiment, the light-emitting device includes at least three of the LED units, and the three LED units are linearly arranged closely 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 further includes four reflection planes parallel to the Z direction, and the four reflection planes are adjacent to each other to form a total light channel, and 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 in close contact with the light-emitting surface of the LED linear array and receives the emitted light of the LED linear array; the light-emitting opening of the total light channel is rectangular; the length of the reflection plane in the Z direction is called its height, and the height of the middle parts of the two reflection planes forming the two long sides of the rectangular light-emitting opening of the total light channel is less than the height of its two ends.

[0279] A lamp includes the above-mentioned light-emitting device and further includes a projection lens. The focus on the central axis of the projection lens coincides with the middle part in the long side direction of the light-emitting opening of the total light channel of the light-emitting device. In one embodiment, the above-mentioned lamp includes at least two light-emitting devices of the above-mentioned third aspect, and the two light-emitting devices are arranged side by side along the short side direction of the light-emitting opening of their total light channels; the two light-emitting devices have different light-emitting colors or different color temperatures of the white light emitted by the two light-emitting devices.

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

[0281] A lamp includes the above-mentioned light-emitting device and further includes a pattern diaphragm and a projection lens. The pattern diaphragm is close to the second plane of the light-emitting device, and the focal plane of the projection lens coincides with the plane where the pattern diaphragm is located.

[0282] In the description of the present application, it should be understood that the terms "including" and "having" used herein and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0283] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An LED light-emitting device, characterized in that: include: An LED array light source includes a plurality of light-emitting chips; A light collecting device array, comprising a plurality of light collecting devices, each of which corresponds to the light emitting chip and is used to collect light emitted by the corresponding light emitting chip and emit the light through a light outlet of the light collecting device; The radius of the inscribed circle of the light outlet of the light collecting device is less than or equal to 5 times the radius of the inscribed circle of the corresponding light emitting surface of the light emitting chip; A transmission lens is provided, wherein the transmission lens can obtain the outgoing light from the light exit ports of the plurality of light collecting devices, and the transmission lens deflects the outgoing light from the light exit ports of the light collecting devices.

2. The LED lighting device according to claim 1, characterized in that: The diameter of the circumscribed circle of the minimum light spot formed at the rear end of the conductive lens is greater than or equal to 0.4 times the diameter of the circumscribed circle of the LED array light source.

3. The LED lighting device according to claim 1, characterized in that: The light collecting device comprises at least two convex lenses, and 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 collecting device; Alternatively, the light collecting device comprises a reflective cup, the reflective cup having a light inlet and a light outlet opposite to each other, and a reflective inner wall located between the light inlet and the light outlet; The light inlet of the reflective 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 reflective cup and is reflected before being emitted from the light outlet of the reflective cup. The light outlet of the reflective cup is the light outlet of the light collecting device.

4. The LED lighting device according to claim 1, characterized in that: The radius of the inscribed circle of the light outlet of the light collecting device is greater than or equal to 1.5 times the radius of the inscribed circle of the corresponding light emitting surface of the light emitting chip; Preferably, the radius of the inscribed circle of the light outlet 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.

5. The LED lighting device according to claim 1, characterized in that: The conductive lens receives light emitted from the light collecting device array, and the diameter of the circumscribed circle of the spot range of the light 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; Preferably, the conductive lens receives light emitted from the light collecting device array, and the diameter of the circumscribed circle of the spot range of the light 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.

6. The LED lighting device according to claim 1, characterized in that: The LED lighting device is configured as follows: Among them, R is the inscribed circle radius of the light outlet of the light collecting device, r is the inscribed circle radius of the light emitting surface of the light emitting chip corresponding to the light collecting device; D1 is the circumscribed circle diameter of the spot range incident on the surface of the conductive lens, and F1 is the focal length of the conductive lens.

7. The LED lighting device according to claim 1, characterized in that: The LED light emitting device comprises a first fly-eye lens and a second fly-eye lens which are arranged in sequence along the light path and are located between the light collecting device array and the conducting lens; The first fly-eye lens comprises a plurality of first convex lenses closely arranged to each other, and the second fly-eye lens comprises a plurality of second convex lenses closely arranged to each other; The first fly-eye lens and the second fly-eye lens are provided separately; or, the first fly-eye lens and the second fly-eye lens are integrally formed to form a fly-eye lens body.

8. The LED lighting device according to claim 1, characterized in that: The light emitting surface of the light emitting chip is circular in shape.

9. The LED lighting device according to any one of claims 1 to 8, characterized in that: It includes a first LED array light source and a corresponding light collecting device array, and includes a second LED array light source and a corresponding light collecting device array; the first LED array light source and the second LED array light source have different luminous colors; It also includes a spectroscopic filter, which can transmit the light emitted by the first LED array light source and reflect the 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 collecting device array and then emitted and transmits the spectroscopic filter to form a first emitted light. The light emitted by the second LED array light source is collected by the corresponding light collecting device array and then emitted and reflected by the spectroscopic filter to form a second emitted light. The first emitted light and the second emitted light are combined into one beam and then incident on the transmission lens.

10. The LED lighting device according to any one of claims 1 to 8, characterized in that: The light-emitting chip comprises at least two sub-chips, and the light-emitting colors of at least two of the sub-chips are different; In the LED array light source, in at least two of the light-emitting chips, the sub-chips emitting the same light-emitting color are placed in different positions in the respective light-emitting chips.

11. An LED lighting system, characterized in that: The invention comprises an LED lighting device as claimed in any one of claims 1 to 10, and an angle adjustment lens, wherein the angle adjustment lens receives light emitted from the conductive lens.

12. The LED lighting system according to claim 11, characterized in that: 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 less than or equal to 1.5 times the focal length of the transmission lens.

13. The LED lighting system according to claim 11, characterized in that: The distance from the vertex of the light exit surface of the transmission lens to the vertex of the light entrance surface of the angle adjustment lens is greater than or equal to the distance from the vertex of the light exit surface of the angle adjustment lens to the minimum position of the light spot at the rear end of the optical path of the angle adjustment lens.

14. The LED lighting system according to claim 11, characterized in that: The focal length of the angle adjustment lens is greater than or equal to 0.5 times the focal length of the transfer lens and less than or equal to 1.5 times the focal length of the transfer lens.

15. A remote lighting LED lamp, characterized in that: The LED lighting system comprises the LED lighting system as claimed in any one of claims 11 to 14, and a pattern aperture located near the angle adjustment lens, wherein the pattern aperture comprises a light-transmitting area having a pattern; The remote lighting LED lamp 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 a far field.

Images