Lighting devices and lamps

Abstract

A light-emitting device is proposed, comprising a light source emitting collimated light, a first reflector array and a second reflector array, wherein the first reflector array comprises at least two non-parallel plane reflectors M1 and M2, the normal of the plane reflector M1 and the normal of the plane reflector M2 intersect at point A, and point A is located on the side of the first reflector array that receives the incident light; the M1 reflected light reflected by the plane reflector M1 overlaps with the M2 reflected light reflected by the plane reflector M2 in space to form an overlapping area; and the second reflector array is located in the overlapping area. The collimated light emitted by the light source will form at least two overlapping sub-beams after being reflected by the first reflector array, and the second reflector array is located in the overlapping area of ​​the two sub-beams, so that the number of sub-beams can be increased rapidly, and these sub-beams have different emission directions, so a wider range of decorative effects can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of lighting, in particular to a light emitting device and a lamp using the light emitting device. Background Art

[0002] In the field of decorative lighting, some lamps with special lighting effects are needed, such as using a lamp to achieve a large area rendering effect. Currently, there is no product on the market that can achieve this effect. Summary of the invention

[0003] In order to achieve the lighting effect of a large area rendering with a single lamp, the utility model proposes a light-emitting device, including a light source for emitting collimated light, a first reflector array and a second reflector array, wherein the collimated light emitted by the light source is reflected by the first reflector array and the second reflector array in sequence to form the output light of the light-emitting device; wherein the first reflector array includes at least two mutually non-parallel plane reflectors M1 and plane reflector M2, the normal of the plane reflector M1 and the normal of the plane reflector M2 intersect at point A, and the point A is located at a receiving point of the first reflector array. one side of the incident light; part of the collimated light incident on the plane reflector M1 is reflected by the plane reflector M1 to form M1 reflected light, and part of the collimated light incident on the plane reflector M2 is reflected by the plane reflector M2 to form M2 reflected light, and the M1 reflected light and the M2 reflected light overlap in space to form an overlapping area; the second reflector array includes at least two mutually non-parallel plane reflectors M3 and plane reflector M4, at least a portion of the plane reflector M3 is located in the overlapping area, and at least a portion of the plane reflector M4 is also located in the overlapping area.

[0004] The above-mentioned light-emitting device further includes a second motor for driving the second reflector array to rotate as a whole; or, further includes a first motor for driving the first reflector array to rotate as a whole.

[0005] The above-mentioned light emitting device further includes a third reflector located between the optical paths of the first reflector array and the second reflector array. The M1 reflected light and the M2 reflected light are respectively reflected by the third reflector and overlap in space to form an overlapping area.

[0006] In the above-mentioned light emitting device, the number of plane reflectors on the second reflector array that are irradiated by the reflected light of M1 is not less than 50% of the total number of plane reflectors on the second reflector array.

[0007] In the above-mentioned light emitting device, the normal line of the plane reflector M3 and the normal line of the plane reflector M4 intersect at point B, and point B is located on the side of the second reflector array that receives the incident light.

[0008] In the above-mentioned light-emitting device, the light source includes a light generator, which includes a laser source and a fluorescent conversion material. The laser source emits laser to excite the fluorescent conversion material to emit converted light; the light generator also includes a collimating lens, and the converted light forms collimated light after passing through the collimating lens.

[0009] In the above-mentioned light emitting device, the laser light forms a converged light beam, and the converged light beam has a convergent focus; the focus of the collimating lens coincides with the convergent focus.

[0010] In the above-mentioned light emitting device, the light source further comprises a pattern aperture located at the convergence focus, the pattern aperture comprises a light-transmitting area and a light-shielding area, and part of the light passes through the light-transmitting area and then enters the collimating lens.

[0011] In the above-mentioned light emitting device, the light source further comprises a third motor for driving the pattern aperture to rotate so that different positions of the pattern aperture are covered on the light path.

[0012] A lamp is also proposed, comprising the above-mentioned light-emitting device, a structural member and a power supply device, wherein the light source, the first reflector array and the second reflector array in the light-emitting device are all fixed in the structural member, and the power supply device supplies power to the light source in the light-emitting device.

[0013] Since point A and the incident collimated light are located on the same side of the first reflector array, the collimated light emitted by the light source will form at least two overlapping sub-beams after being reflected by the first reflector array, and the second reflector array is located in the overlapping area of ​​these two sub-beams, so that the number of sub-beams can be rapidly increased. These sub-beams have different emission directions, so a wider range of decorative effects can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1a and 1b It shows the structural schematic diagram of the first embodiment of the utility model;

[0015] Figure 1c It indicated Figure 1a and Figure 1b A schematic diagram of the far-field spot distribution of the illustrated embodiment;

[0016] Figure 2 A schematic diagram showing the structure of another embodiment of the utility model is shown;

[0017] Figure 3 A schematic diagram showing the structure of another embodiment of the utility model is shown;

[0018] Figure 4 A schematic diagram showing the structure of another embodiment of the utility model is shown;

[0019] Figure 5A schematic diagram showing the structure of a light source of another embodiment of the utility model is shown;

[0020] Figure 6 A schematic diagram showing the structure of a light source of another embodiment of the utility model is shown;

[0021] Figure 7 A structural schematic diagram of a light source according to another embodiment of the utility model is shown. DETAILED DESCRIPTION

[0022] The utility model provides a light emitting device, the structural schematic diagram of which is as follows Figure 1a and 1b The light emitting device comprises a light source 101 for emitting collimated light, a first reflector array 102 and a second reflector array 103, and collimated light 121, 122, 123, 124 emitted by the light source are sequentially reflected by the first reflector array 102 and the second reflector array 103 to form the emitted light of the light emitting device. For the convenience of explanation, Figure 1a Only the light source and the first reflector array are shown. Figure 1b In Figure 1a A second reflector array and optical path are added to the basis of Figure 1a As shown, the first reflector array 102 includes at least two non-parallel plane reflectors M1 and M2, and the normal lines 102a and 102b of the plane reflectors M1 and M2 intersect at point A, which is located on the side of the first reflector array 102 that receives the incident light. According to the law of optical reflection, since the light emitted by the light source is collimated light, and the normal lines 102a and 102b of the plane reflectors M1 and M2 intersect at point A, the collimated light emitted by the light source is incident on the plane reflectors M1 and M2 respectively, and the reflected light will converge. Figure 1a As shown, part of the collimated light incident on the plane reflector M1 is reflected by the plane reflector M1 to form M1 reflected light 111 (light 125 is one of them), and part of the collimated light incident on the plane reflector M2 is reflected by the plane reflector M2 to form M2 reflected light 112 (light 126 is one of them). The M1 reflected light 111 and the M2 reflected light 112 overlap in space to form an overlapping area 113, which is the area where the collimated light emitted by the light source respectively incident on the plane reflector M1 and the reflected light after the plane reflector M2 passes through.

[0023] like Figure 1bAs shown, the second reflector array 103 includes at least two non-parallel plane reflectors M3 and M4, at least a portion of the plane reflector M3 is located in the above-mentioned overlapping area 113, and at least a portion of the plane reflector M4 is also located in the above-mentioned overlapping area 113. In this way, part of the reflected light M1 reflected by the plane reflector M1 of the first reflector array 102 will be incident on the plane reflector M3 of the second reflector array 103 (such as Figure 1b A portion of the light ray 121 is incident on the plane reflector M4 (such as Figure 1b Similarly, the reflected light M2 reflected by the plane reflector M2 of the first reflector array 102 will be partially incident on the plane reflector M3 of the second reflector array 103 (such as Figure 1b A portion of the light ray 123 is incident on the plane reflector M4 (such as Figure 1b Therefore, after the collimated light beam emitted from the light source is reflected by the first reflector array 102 and the second reflector array 103 in sequence, at least four sub-beams are emitted. Since the plane reflectors M1 and M2 are not parallel to each other, and the plane reflectors M3 and M4 are not parallel to each other, the four sub-beams (such as Figure 1b The emission directions of the light beams 121, 122, 123, and 124 are different. Since the plane reflector only changes the propagation direction of the light beam and does not change the divergence angle of the light beam, the four sub-beams are still collimated beams, and four light spots are formed when they propagate to the far field. Compared with a beam of collimated light emitted by the light source, the four light spots emitted by the light emitting device have an angle with each other, so the total illumination range is much larger and has a better decorative effect.

[0024] It can be understood from the above description that the number of sub-beams finally emitted from the light emitting device is equal to the number of plane reflectors of the first reflector array 102 on the optical path of the collimated light emitted by the light source 101 multiplied by the number of plane reflectors of the second reflector array 103 in the overlapping area 113. In other words, the number of emitted sub-beams can be quickly increased by increasing the number of these two plane reflectors, thereby improving the decorative effect.

[0025] To summarize, since point A is located on the side of the first reflector array 102 that receives the incident light, the collimated light emitted by the light source will form at least two spatially overlapping sub-beams after being reflected by the first reflector array, and the second reflector array is located in the overlapping area of ​​these two sub-beams, so that the number of sub-beams can be rapidly increased. These sub-beams have different emission directions, so a wider range of decorative effects can be achieved.

[0026] In addition, the optical structure of the utility model can also form a seemingly irregular far-field spot distribution, such as Figure 1c The specific working principle is: for a certain plane reflector on the second reflector array, the incident light on it is reflected from at least two plane reflectors on the first reflector array at the same time. For example, the first reflector array includes 9 plane reflectors, so 9 light spots must be formed in the far field. These 9 light spots form a group, and the relative positions of these 9 light spots are determined by the relative angles of the 9 plane reflectors on the first reflector array. For example Figure 1c The light spot group 191 in the image. We can regard these 9 light spots as a group 191, which are respectively reflected from the 9 plane reflectors of the first reflector array, and are also reflected from the same plane reflector on the second reflector array. At the same time, the second reflector array includes at least two plane reflectors, for example, 3 plane reflectors, so that 3 groups of light spots 191, 192, 193 will be formed in the far field (that is, each group corresponds to a plane reflector on the second reflector array), and the relative position relationship of these 3 groups of light spots is determined by the relative angles of the 3 plane reflectors in the second reflector array. Therefore, although the arrangement of the 9 light spots in each group is regular, and the position relationship between the groups is also regular, after the light spots of each group are interspersed and arranged, the overall appearance becomes irregular. Such a decorative effect is formed by the superposition effect of the first reflector array and the second reflector array, which is impossible to achieve with a single reflector array. It is worth noting that Figure 1c In order to show the image clearly, each group of light spots is filled differently, but in reality the shapes of these light spots are almost the same.

[0027] In this embodiment, if Figure 1b As shown, preferably, the normals of the plane reflectors M3 and M4 of the second reflector array intersect at point B, which is located on the side of the second reflector array that receives the incident light. This has the advantage that the multiple sub-beams emitted after being reflected by the second reflector array will converge first and then diverge, so that there will be a position where the light beams are most concentrated on the emission light path; if the light outlet of the entire light emitting device is set at this position, the light outlet can be minimized, thereby making the appearance of the entire light emitting device better. Figure 2 In another embodiment shown, the normals of the plane reflectors M3 and M4 of the second reflector array 203 intersect at point B, which is located on the opposite side of the second reflector array from the incident light, so that each sub-beam reflected and emitted by the second reflector array will diverge directly, and the farther from the second reflector array, the larger the spacing between each sub-beam, and the larger the corresponding light outlet. Of course, this does not affect the effect of the light-emitting device forming a large-scale decorative lighting.

[0028] exist Figure 3 In another embodiment shown, Figure 1b The difference between the embodiment shown is that the second reflector array is twisted, and the sub-beams formed by the reflection of the second reflector array are emitted in the direction of the light source. Although this can also achieve the effect of large-scale decorative lighting, in practice, the light source or its heat sink may block the emitted sub-beams, thereby increasing the design difficulty. Therefore, a more preferred situation is as follows Figure 1b As shown, the second reflector array is arranged so that at least part of the light emitted by the light emitting device has the same direction as the collimated light emitted by the light source.

[0029] The structural schematic diagram of another embodiment of the utility model is as follows Figure 4 As shown. Figure 1b The difference from the embodiment shown is that in this embodiment, the light emitting device further includes a second motor 4032 for driving the second reflector array 403 to rotate as a whole. In this embodiment, the second reflector array 403 is fixed on the second base 4031, and the rotation shaft of the second motor 4032 is connected to the second base 4031, thereby driving the second base to rotate and driving the second reflector array 403 to rotate as a whole. The rotation of the second reflector array will change the light emission direction of each emitted sub-beam, thereby causing multiple light spots in the far field to move. According to the previous description combined with Figure 1c It can be seen that the overall rotation of the second reflector array corresponds to the relative rotation between the groups of light spots, while the relative positions of the light spots in each group remain unchanged, so that in the far field, seemingly irregular relative movement of the light spots will be formed, thereby forming a better decorative effect. Obviously, this seemingly irregular movement effect of multiple light spots is produced by the superposition effect of the first reflector array and the second reflector array of the utility model, and this effect is impossible to achieve with a single reflector array.

[0030] Of course, the second reflector array can also be kept stationary while the first reflector array rotates. For example, the light-emitting device also includes a first motor 4022, which is used to drive the first reflector array 402 to rotate as a whole. In the present embodiment, the first reflector array 402 is fixed on the first base 4021, and the rotating shaft of the first motor 4022 is connected to the first base 4021, thereby driving the first base to rotate and driving the first reflector array 402 to rotate as a whole. In practical applications, since the area of ​​the second reflector array is smaller than that of the first reflector array, it is more economical to set up a second motor. Moreover, the effect of driving the first reflector array to rotate is not the same as that of driving the second reflector array to rotate. According to the above and principle description, by driving the first reflector array to rotate, the relative position of each group of light spots is fixed, and each group rotates. If properly matched, a good decorative effect can also be obtained. Of course, it can also be as follows Figure 4As shown, the first motor 4022 and the second motor 4032 are used simultaneously to respectively drive the first reflector array 402 and the second reflector array 403 to rotate as a whole. At this time, the rotation of the first reflector array corresponds to the rotation of "each group" of light spots, and the rotation of the second reflector array corresponds to the relative revolution of "each group" of light spots. Therefore, the movement of each light spot in the far field will be more irregular, and the visual effect will be better.

[0031] According to the above description, the collimated light emitted from the light source is divided into a plurality of sub-beams at angles to each other after being reflected by the first reflector array and the second reflector array, and each sub-beam is still collimated light. If the brightness of the light spot formed by each sub-beam in the far field is to be guaranteed, the parallelism of the collimated light emitted by the light source must be high enough, which places high demands and challenges on the light source. The following embodiments focus on explaining the principle and structure of the light source that emits collimated light, so the first reflector array, the second reflector array and the light path after the light source are no longer marked in the corresponding diagrams, because this part of the content has been clearly explained in the above embodiments.

[0032] In another embodiment of the present invention, the structural diagram of the light source of the light emitting device is as follows Figure 5 As shown, the light source includes a light generator 551, and the light generator 551 includes a laser source 553 and a fluorescent conversion material 554. The laser source 553 emits a laser 528 to excite the fluorescent conversion material 554 to make it emit a stimulated light 521; the light source also includes a collimating lens 552, and the stimulated light 521 is emitted as collimated light after passing through the collimating lens 552. The laser has the characteristics of high intensity and high collimation, so a very small focal point can be formed on the fluorescent conversion material 554, and the focal point is the light source of the stimulated light 521. Since the focal point is very small, it can be known from optical theory that the parallelism of the emitted light 521 will be very high, that is, the divergence angle is very small, so that a brighter sub-spot can be achieved in the far field. It can be understood that Figure 5 The optical structure shown is only used to simplify the principle of using laser to excite the fluorescent conversion material, and is not limited to this optical structure. In fact, the fluorescent conversion material can also be reflective, that is, the fluorescent conversion material includes a reflective backplane, the laser is incident from one side of the fluorescent conversion material, and the stimulated laser is also emitted from the same side. In practical applications, there can be a variety of optical structures to achieve laser excitation of fluorescent conversion materials, and the utility model does not limit the optical relationship between the laser source and the fluorescent conversion material inside the light source.

[0033] In another embodiment of the present invention, the structural diagram of the light source is as follows Figure 6As shown. The converted light 621 emitted from the fluorescent conversion material 654 forms a converged light beam, and the converged light beam has a convergent focus 621a. The focus of the collimating lens 652 coincides with the convergent focus 621a, so the collimating lens 652 can collimate the light emitted from the convergent focus 621a to form collimated light. In this embodiment, a lens group 655 is used to collect and converge the converted light 621 emitted from the fluorescent conversion material 654. This embodiment is different from Figure 5 Compared with the embodiment shown, although the light source structure is more complicated, a convergent focus is formed, and it is easier to eliminate the dispersion formed in the collimation, so that the far-field light spot is more uniform.

[0034] Preferably, in this embodiment, the light source further includes a pattern aperture 656 located at the convergence focus 621a, and the pattern aperture includes a light-transmitting area 656a and a light-shielding area, and part of the light passes through the light-transmitting area 656a and is incident on the collimating lens 652. The pattern of the light-transmitting area can be projected by the collimating lens 652 to form an image in the far field, and after the first reflector array and the second reflector array, each light spot has the shape of the light-transmitting area, which further enriches the decorative effect. For example, if the light-transmitting area is a five-pointed star, multiple five-pointed star-shaped light spots can be formed in the far field, and then in combination with the first motor and / or the second motor, multiple five-pointed star-shaped light spots with irregular motion can be obtained.

[0035] In practical applications, preferably, the pattern aperture may also include a plurality of light-transmitting areas distributed along the circumference, and the light source also includes a third motor 657 for driving the pattern aperture to rotate so that different positions of the pattern aperture are covered on the light path, thereby achieving the effect of switching the light spot pattern.

[0036] In practical applications, a color filter can also be used near the convergence focus 621a to make the outgoing light have color or color. Since the aperture of the light path at the convergence focus 621a is relatively small, the color filter can also be used relatively small, thereby saving costs. Of course, color filters can be used at all locations of the light path of the light emitting device to make the outgoing light spot have color or color.

[0037] In the above embodiments, the reflected light from the first reflector array is directly incident on the second reflector array. In practical applications, in order to reduce the volume of the light path and the volume of the lamp, a reflector can be used to bend the light path, such as Figure 7 As shown. Figure 1a and 1b The embodiment shown is different in that Figure 7In the structural schematic diagram of another embodiment shown, the light emitting device further includes a third reflector 704 located between the optical paths of the first reflector array 702 and the second reflector array 703. The M1 reflected light 721 (indicated by a dotted line in the figure) and the M2 reflected light 722 (indicated by a solid line in the figure) are respectively reflected by the third reflector 704 and overlap in space to form an overlapping area, and the second reflector array 703 is located in the overlapping area. It is easy to understand that if the third reflector 704 does not exist, the overlapping area generated by the overlap of the M1 reflected light 721 and the M2 reflected light 722 in space will be located above the third reflector 704 in the figure, which will significantly increase the volume of the entire system. However, the third reflector 704 does not affect the overlap of the M1 reflected light 721 and the M2 reflected light 722 in space to form an overlapping area, but only changes the position of the overlapping area by bending the optical path, thereby greatly reducing the volume of the system.

[0038] Another difference of this embodiment is that the second reflector array includes three plane reflectors. In practical applications, both the second reflector array and the first reflector array will include multiple plane reflectors, so that more sub-beams can be formed. According to the previous principle explanation, it can be understood that the M1 reflected light itself is a beam of light. The more plane reflectors on the second reflector array it irradiates, the more sub-beams in different directions the M1 reflected light is divided into, and the better the decorative effect. Therefore, preferably, the number of plane reflectors on the second reflector array 703 irradiated by the M1 reflected light is not less than 50% of the total number of plane reflectors on the second reflector array. For example, in this embodiment, the M1 reflected light can irradiate all plane reflectors on the second reflector array. Of course, the number of plane reflectors on the first reflector array and the second reflector array cannot be too many, otherwise, although the number of sub-beams is large, the brightness of each sub-beam will be too low, thereby destroying the lighting decoration effect.

[0039] The utility model also proposes a lamp, comprising the above-mentioned light-emitting device, and also comprising a structural member and a power supply device, wherein the light source, the first reflector array and the second reflector array in the light-emitting device are all fixed in the structural member, and the power supply device supplies power to the light source in the light-emitting device.

[0040] The above description is only an embodiment of the utility model, and does not limit the patent scope of the utility model. The features of each embodiment can be used interchangeably. Any equivalent structure or equivalent process transformation made by using the contents of the utility model specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the utility model.

Claims

1. A light emitting device, characterized in that: The invention comprises a light source for emitting collimated light, a first reflector array and a second reflector array, wherein the collimated light emitted by the light source is reflected by the first reflector array and the second reflector array in sequence to form the emitted light of the light emitting device; wherein the first reflector array comprises at least two mutually non-parallel plane reflectors M1 and plane reflectors M2, a part of the collimated light incident on the plane reflector M1 is reflected by the plane reflector M1 to form M1 reflected light, a part of the collimated light incident on the plane reflector M2 is reflected by the plane reflector M2 to form M2 reflected light, the M1 reflected light and the M2 reflected light overlap in space to form an overlapping area; the second reflector array comprises at least two mutually non-parallel plane reflectors M3 and plane reflectors M4, at least a part of the area of ​​the plane reflector M3 is located in the overlapping area, and at least a part of the area of ​​the plane reflector M4 is also located in the overlapping area.

2. The light emitting device according to claim 1, characterized in that: It also includes a second motor for driving the second reflector array to rotate as a whole; or, it also includes a first motor for driving the first reflector array to rotate as a whole.

3. The light emitting device according to claim 1 or 2, characterized in that: It also includes a third reflector located between the optical paths of the first reflector array and the second reflector array. The M1 reflected light and the M2 reflected light are respectively reflected by the third reflector and overlap in space to form an overlapping area.

4. The light emitting device according to claim 1 or 2, characterized in that: The number of plane reflectors on the second reflector array that are irradiated by the reflected light of M1 is not less than 50% of the total number of plane reflectors on the second reflector array.

5. The light emitting device according to claim 1 or 2, characterized in that: The normal line of the plane reflector M3 and the normal line of the plane reflector M4 intersect at point B, and point B is located on the side of the second reflector array that receives the incident light.

6. The light emitting device according to claim 1 or 2, characterized in that: The light source comprises a light generator, which comprises a laser source and a fluorescent conversion material. The laser source emits laser light to excite the fluorescent conversion material to emit converted light. The light generator also comprises a collimating lens, and the converted light is emitted as collimated light after passing through the collimating lens.

7. The light emitting device according to claim 6, characterized in that: The stimulated light forms a converged light beam having a convergent focus; the focus of the collimating lens coincides with the convergent focus.

8. The light emitting device according to claim 7, characterized in that: The light source further comprises a pattern aperture located at the convergence focus, the pattern aperture comprises a light-transmitting area and a light-shielding area, and part of the light passes through the light-transmitting area and then enters the collimating lens.

9. The light emitting device according to claim 8, characterized in that: The light source further includes a third motor for driving the pattern aperture to rotate so that different positions of the pattern aperture are covered on the light path.

10. A lamp, characterized in that: A light emitting device comprising any one of claims 1 to 9, further comprising a structural member and a power supply device, wherein the light source, the first reflector array and the second reflector array in the light emitting device are all fixed in the structural member, and the power supply device supplies power to the light source in the light emitting device.

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