Light source device and lighting system

Abstract

The application relates to a light source device and a lighting system. The light source device comprises: a light source for emitting first light; a light processing module for receiving the first light and emitting second light after processing; the interval between at least two adjacent light beams contained in the first light is greater than the interval between at least two adjacent light beams contained in the second light. The interval between adjacent light beams in the second light is reduced by the light processing module, and the interval between the light spots presented by the two adjacent processed lights is reduced. When the light processing device is applied to the lighting system, the angular distribution of the output light beam of the lighting system can be obviously improved, and a hole in the angular distribution can be avoided.

Description

Technical Field

[0001] This application relates to the field of laser technology, and in particular to a light source device and an illumination system. Background Technology

[0002] Laser light sources are widely used in lighting and display systems due to their advantages such as vibrant colors, high brightness, good directivity, and strong controllability. However, in existing lasers, due to the structural limitations of the laser source itself—taking a 2x5 laser array as an example—the spacing between the individual light sources in the array is relatively large, resulting in a large spacing between the individual light spots in the output beam. Figure 1 As shown, when this laser source is applied to a lighting system, holes exist in the angular distribution of the system's output beam, which reduces the system's light output quality. Utility Model Content

[0003] Therefore, it is necessary to provide a light source device and a lighting system.

[0004] In a first aspect, this application provides a light source device, comprising:

[0005] The light source is used to emit the first beam.

[0006] An optical processing module is used to receive the first light and process it to emit the second light;

[0007] The spacing between at least two adjacent beams in the first light is greater than the spacing between at least two adjacent beams in the second light.

[0008] In one embodiment, the light processing module includes at least two first light processing units;

[0009] The first optical processing unit includes a first reflective element and a transmissive element;

[0010] The transflective element is used to receive the first light emitted from the light source and to emit the second light transmitted through the transflective element;

[0011] The first reflective element is used to receive the first light reflected by the transflective element and to emit the second light.

[0012] In one embodiment, the light processing module includes at least two second light processing units;

[0013] Each of the second light processing units includes a first refractive element and a second refractive element;

[0014] The first refractive element is used to receive the first light and emit the third light refracted by the first refractive element;

[0015] The second refractive element is used to receive the third light and emit the second light refracted by the second refractive element.

[0016] In one embodiment, the light processing module includes at least two third light processing units;

[0017] Each of the third light processing units includes a second reflective element; the second reflective element is used to receive the first light and emit the second light reflected by the second reflective element;

[0018] The spacing between adjacent second reflective elements in the direction perpendicular to the light propagation of the first light is smaller than the spacing between adjacent beams contained in the first light.

[0019] In one embodiment, the light processing module includes a fourth light processing unit;

[0020] The fourth optical processing unit includes a third reflective element and at least two third refractive elements arranged at intervals;

[0021] The third reflective element is used to receive the first light and emit a fourth light reflected by the third reflective element.

[0022] The third refractive element is used to receive a portion of the fourth light and emit the fifth light; the remaining fourth light is emitted directly.

[0023] The fifth light is mixed with the adjacent, directly incident fourth light to form the second light.

[0024] In one embodiment, the light source device includes at least two light sources;

[0025] The light processing module includes at least two light processing units, which are one of a first light processing unit, a second light processing unit, and a third light processing unit; each light processing unit is configured in a one-to-one correspondence with the light source.

[0026] The light source device further includes a light combining module; the light combining module is disposed on the light propagation path of the second light, and is used to receive each of the second light beams and emit a mixed light after the second light beams have been processed by light combining.

[0027] In one embodiment, the light source device includes at least two light sources and a light combining module;

[0028] The light combining module is disposed on the propagation path of the first light, and is used to receive each of the first light beams and output at least two columns of mixed light after the first light beams have been processed by light combining.

[0029] The optical processing module includes at least two second optical processing units, which are used to receive a column of the mixed light and output a column of second light after the mixed light has been processed by the second optical processing unit.

[0030] In one embodiment, the light source device includes at least two light sources; one of the at least two light sources is a red light source;

[0031] The light processing module includes a fourth light processing unit, which is used to receive at least two beams of red light emitted from the red light source and to emit at least two beams of red light whose light propagation paths have been changed by the fourth light processing unit.

[0032] The light source device further includes a light combining module, which is disposed on the propagation path of the second light and the propagation path of the remaining first light except for the red light, for receiving each of the first light and each of the second light, and outputting the mixed light of each of the first light and the second light after light combining processing.

[0033] In one embodiment, the light source device further includes a light-diffusing module;

[0034] The uniform light module is disposed on the propagation path of the mixed light and is used to propagate the mixed light and perform multiple internal reflections on the mixed light in the direction of travel of the mixed light.

[0035] Secondly, this application also provides a lighting system that includes the light source device provided in any of the above embodiments.

[0036] In the aforementioned light source device and lighting system, the first light emitted by the light source is optically processed by a light processing module. This alters the light propagation path of a portion of the first light beam, resulting in a smaller spacing between adjacent beams in the emitted second light compared to the spacing between adjacent beams in the received first light. This reduces the distance between two adjacent second light beams, thereby decreasing the spacing between the light spots presented by two adjacent second light beams. When this light source device is applied to a lighting system, it can significantly improve the angular distribution of the output beam, preventing voids in the angular distribution. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1The light spot presented by the output beam of the laser source array in related technologies;

[0039] Figure 2 A structural block diagram of a light source device provided in one embodiment;

[0040] Figure 3 This is one of the structural schematic diagrams of an optical processing module provided in one embodiment;

[0041] Figure 4 for Figure 3 The light processing module shown is applied to the output beam spot obtained in the lighting system;

[0042] Figure 5 This is a second schematic diagram of the structure of an optical processing module provided in one embodiment;

[0043] Figure 6 for Figure 5 The light processing module shown is applied to the output beam spot obtained in the lighting system;

[0044] Figure 7 This is the third schematic diagram of the structure of the light processing module provided in one embodiment;

[0045] Figure 8 Fourth schematic diagram of the structure of an optical processing module provided in one embodiment;

[0046] Figure 9 One of the schematic diagrams of a light source device provided in one embodiment;

[0047] Figure 10 This is a second schematic diagram of the structure of a light source device provided in one embodiment;

[0048] Figure 11 This is the third schematic diagram of the structure of a light source device provided in one embodiment.

[0049] Explanation of reference numerals in the attached figures:

[0050] 100 - Light source, 110 - Green light source, 120 - Red light source, 130 - Blue light source, 200 - Light processing module. 210-First light processing unit, 211-Transmitting and reflecting element, 212-First reflecting element, 220-Second light processing unit, 221-First refractive element, 222-Second refractive element, 230-Third light processing unit, 231-Second reflecting element, 240-Fourth light processing unit, 241-Third reflecting element, 242-Third refractive element, 300-Light combining module, 310-Fourth reflecting element, 320-Red-transmitting and green-reflecting element, 330-Red-green-reflecting and blue-reflecting element, 340-Fifth reflecting element, 350-Green-transmitting and red-reflecting element, 360-Sixth reflecting element, 400-Collecting module, 500-Light homogenizing module, 600-Scattering module, 610-First scattering element, 620-Second scattering element, 700-Aperture stop, 800-Lens module. Detailed Implementation

[0051] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0053] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first reflective element may be referred to as a second reflective element, and similarly, a second reflective element may be referred to as a first reflective element. Both the first reflective element and the second reflective element are reflective elements, but they are not the same reflective element.

[0054] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0055] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0056] In this embodiment, the light source can be a light source array. For example, the light source can be any one of a red light source array, a green light source array, and a blue light source array.

[0057] In one embodiment, this application provides a light source device, such as... Figure 2 As shown, it includes a light source 100 and a light processing module 200.

[0058] Light source 100 can be used to emit a first light. The first light may include at least two beams. Light processing module 200 is used to receive the first light and process it to emit a second light. Light processing module 200 can perform optical processing such as refraction and reflection on the first light to form the second light. The distance between at least two adjacent beams in the first light is greater than the distance between at least two adjacent beams in the second light.

[0059] In this embodiment, the light processing module 200 optically processes the first light emitted by the light source 100, altering the light propagation path of a portion of the first light beam. This results in the spacing between adjacent beams in the emitted second light being smaller than the spacing between adjacent beams in the received first light, thus reducing the spacing between two adjacent second light beams and consequently reducing the spacing between the light spots presented by two adjacent second light beams. When this light source device is applied to a lighting system, it can significantly improve the angular distribution of the output beam of the lighting system, avoiding voids in the angular distribution.

[0060] In one embodiment, such as Figure 3 As shown, the light processing module 200 includes at least two first light processing units 210. Each first light processing unit 210 is used to perform optical processing on a beam of light emitted by the light source 100.

[0061] Furthermore, the first light processing unit 210 includes a first reflective element 212 and a transflective element 211. The transflective element 211 is used to receive the first light emitted from the light source 100 and to emit the second light transmitted through the transflective element 211. The first reflective element 212 is used to receive the first light reflected by the transflective element 211 and to emit the second light.

[0062] It can be understood that a beam of light from the first light emitted by the light source 100 undergoes semi-transmission and semi-reflection processing via the transmissive element 211, and the transmitted beam forms a beam of light in the second light. The reflected beam is then reflected again by the first reflective element 212 to form another beam of light in the second light. By setting multiple first light processing units 210, the multiple beams of light emitted by the light source 100 can be expanded to twice the number of beams, thus reducing the spacing between adjacent beams in the second light. When applied to a lighting system, this results in a light spot of the output beam, as shown in the image. Figure 4 As shown, the spacing between two adjacent beams is significantly reduced, which makes the angular distribution of the output beam more uniform. Furthermore, the spacing between adjacent beams in the second beam is related to the distance between the first reflecting element and the transmissive element; the spacing between adjacent beams can be changed by altering the relative distance between the first reflecting element and the transmissive element.

[0063] In one embodiment, such as Figure 5 As shown, the light processing module 200 includes at least two second light processing units 220. Each second light processing unit 220 includes a first refractive element 221 and a second refractive element 222. The first refractive element 221 receives first light and emits third light refracted by the first refractive element 221. The second refractive element 222 receives the third light and emits second light refracted by the second refractive element 222. The first refractive element 221 and the second refractive element 222 can be a prism assembly.

[0064] One beam of light in the first light is refracted by the first refractive element 221 in a direction close to the axis of symmetry of the light source 100, and then refracted by the second refractive element 222 to form one beam of light in the second light.

[0065] By setting multiple second light processing units 220, each beam of the first light emitted by the light source 100 can be refracted. This does not change the number of beams, but reduces the spacing between adjacent beams, thereby reducing the spacing between the light spots of adjacent beams and improving the surface distribution of the second light. When applied to a lighting system, the resulting output beam spot is as follows: Figure 6 As shown, the spacing between two adjacent columns of light spots is significantly reduced, which in turn makes the angular distribution of the output beam more uniform.

[0066] In one embodiment, such as Figure 7 As shown, the light processing module 200 includes at least two third light processing units 230. Each third light processing unit 230 includes a second reflective element 231. The second reflective element 231 receives first light and emits second light reflected by the second reflective element 231.

[0067] In this design, the spacing between adjacent second reflective elements perpendicular to the light propagation direction of the first light is smaller than the spacing between adjacent beams contained in the first light. This reduces the spacing between the two beams formed after adjacent beams in the first light are reflected by their respective second reflective elements. Consequently, the spacing between the light spots presented by two adjacent beams can be reduced, improving the surface distribution of the second light.

[0068] In one embodiment, such as Figure 8 As shown, the light processing module 200 includes a fourth light processing unit 240. The fourth light processing unit 240 includes a third reflective element 241 and at least two spaced-apart third refractive elements 242. The third reflective element 241 receives first light and emits fourth light reflected by itself. The third refractive element 242 receives a portion of the fourth light and emits a fifth light, with the remaining fourth light emitted directly. The fifth light mixes with the adjacent directly emitted fourth light to form a second light.

[0069] In this embodiment, the light source 100 is a red light source. The angular distribution of the red light emitted by the red light source is two non-intersecting rectangles. By setting the fourth light processing unit 240, in the red light emitted by the light source 100, the reflected light after each beam of light is reflected by the third reflecting element 241 is divided into two paths: the first path is refracted by the third refractive element 242, and the second path is direct. The refracted first path of light may merge with the second path of light corresponding to the adjacent initial light to form a single beam of light, thereby reducing the distance between two adjacent beams of light and improving the angular distribution of the final output beam, making its angular distribution appear as a long rectangle.

[0070] In one embodiment, such as Figure 9 As shown, the light source device includes at least two light sources 100, a light processing module 200, and a light combining module 300.

[0071] Each light source 100 is used to output the first light.

[0072] The light processing module 200 includes at least two light processing units, which can be one of a first light processing unit 210, a second light processing unit 220, and a third light processing unit 230. Each light processing unit is configured in a one-to-one correspondence with a light source 100, that is, one light processing unit is configured on the optical path of the first light output from one light source 100.

[0073] The beam combining module 300 is positioned along the light propagation path of the second beams to receive each second beam and output a mixed light after beam combining. The beam combining module 300 can combine multiple beams with different wavelengths and different light propagation paths to form a mixed light.

[0074] Taking a laser comprising a green light source 110, a red light source 120, and a blue light source 130 as an example, the specific structure of the light combining module 300 is described below. The light combining module 300 may include a fourth reflective element 310, a red-transmitting and green-reflecting element 320, a red-green-transmitting and blue-reflecting element 330, and a fifth reflective element 340. Specifically, the second light corresponding to the red light source 120 (hereinafter referred to as the first processed light for ease of description) passes through the red-transmitting and green-reflecting element 320 and the red-green-reflecting and blue-reflecting element 330 sequentially, and its propagation direction and path remain unchanged. The second light corresponding to the green light source 110 (hereinafter referred to as the second processed light for ease of description) is first reflected by the fourth reflective element 310 and the red-transmitting and green-reflecting element 320 sequentially, and its propagation path almost coincides with that of the first processed light. The second light corresponding to the blue light source 130 (hereinafter referred to as the third processed light for ease of description) passes through the fifth reflective element 340 and the red-green-reflecting and blue-reflecting element 330 sequentially, and its propagation path almost coincides with that of the first processed light. It can be understood that by setting the fourth reflective element 310, the red-transmitting and green-reflecting element 320, the red-transmitting and green-reflecting and blue-reflecting element 330, and the fifth reflective element 340, the light propagation paths of the second and third processed light are changed, so that the second and third processed light and the first processed light are combined into a mixed light.

[0075] In addition, since the red light emitted by the red light source 120 has a large divergence angle, the longer the red light path, the greater the dilution of its optical expansion. Therefore, by using the light propagation path of the first processed light corresponding to the red light source 120 as the light propagation path of the combined light column, the red light path can be minimized.

[0076] In one embodiment, such as Figure 10 As shown, the light source device includes at least two light sources 100, a light combining module 300, and a light processing module 200.

[0077] The light combining module 300 is positioned on the propagation path of the first light and is used to receive each first light and output at least two columns of mixed light after the first light has been processed by light combining.

[0078] The optical processing module 200 includes at least two second optical processing units 220, which are used to receive a column of mixed light and output a column of second light after the mixed light has been processed by the second optical processing unit 220.

[0079] In this embodiment, the first light is first combined by the light combining module 300 to form at least two mixed light pillars, and then the two mixed light pillars are processed by the second light processing unit 220 to form two second light pillars. This can reduce the number of components used and lower the cost.

[0080] In one embodiment, such as Figure 11As shown, the light source device includes at least two light sources 100, a light processing module 200, and a light combining module 300. One of the at least two light sources 100 is a red light source 120.

[0081] The light processing module 200 includes a fourth light processing unit 240. The fourth light processing unit 240 is used to receive at least two beams of red light emitted from the red light source 120, and output at least two beams of red light after the light propagation path of the beams has been changed by the fourth light processing unit 240.

[0082] The light combining module 300 is positioned on the propagation path of the second light and the propagation path of the remaining first light (excluding the red light), and is used to receive each first light and each second light, and output the mixed light after the first light and the second light have been processed by light combining.

[0083] Taking a laser comprising a green light source 110, a red light source 120, and a blue light source 130 as an example, the specific structure of the light combining module 300 is described below. The light combining module 300 may include a green-transmitting red-reflecting element 350, a red-green-transmitting blue-reflecting element 330, and a sixth reflecting element 360. Specifically, the green light output from the green light source 110 is transmitted sequentially through the green-transmitting red-reflecting element 350 and the red-green-blue-reflecting element 330. The second light corresponding to the red light source 120, after being reflected by the green-transmitting red-reflecting element 350, almost coincides with the light propagation path of the green light. The blue light output from the blue light source 130, after being reflected sequentially by the sixth reflecting element 360 and the red-green-blue-reflecting element 330, coincides with the light propagation path of the green light.

[0084] In one embodiment, such as Figures 9-11 As shown, the laser also includes a homogenizing module 500. The homogenizing module 500 is positioned along the propagation path of the mixed light, used to propagate the mixed light and perform multiple internal reflections on it in the direction of its travel, thereby making the angular distribution of the mixed light more uniform. The homogenizing module 500 may include a hexagonal light bar or a circular light bar, etc.

[0085] In one embodiment, such as Figures 9-11 As shown, the laser also includes a collection module 400. The collection module 400 can be disposed between the beam combining module 300 and the beam homogenizing module 500. The collection module 400 can be a lens group, which can further converge the mixed light and output mixed light that meets the input requirements of the beam homogenizing module 500.

[0086] In one embodiment, such as Figures 9-11As shown, the laser also includes a scattering module 600. The scattering module 600 may include a first scattering element 610 and a second scattering element 620. The first scattering element 610 is disposed between the collecting module 400 and the homogenizing module 500, and can be used to eliminate the influence of the manufacturing process and materials used in the combining module 300, collecting module 400, and other modules on the light beam. The second scattering element 620 is disposed on the side of the homogenizing module 500 away from the collecting module 400, and can be used to eliminate the influence of the manufacturing process and materials used in the homogenizing module 500 on the light beam.

[0087] In one embodiment, such as Figures 9-11 As shown, the laser also includes an aperture 700. The aperture 700 is positioned on the side of the second scattering element 620 away from the homogenizing module 500.

[0088] In one embodiment, such as Figures 9-11 As shown, the laser also includes a lens module 800. The lens module 800 may include multiple lens elements.

[0089] In one embodiment, based on the same concept, this application also provides a lighting system including a light source device. The light source device can be any of the light source devices provided in the above embodiments. The lighting system can be a lighting system or a display system, etc. Because the light beams output by the light source device have very small spacing between the light spots and uniform angular and surface distribution, the light field distribution of the lighting system can be made more uniform, improving the performance of the lighting system.

[0090] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A light source device, characterized in that, include: The light source is used to emit the first beam. An optical processing module is used to receive the first light and process it to emit the second light; The spacing between at least two adjacent beams in the first light is greater than the spacing between at least two adjacent beams in the second light.

2. The light source device according to claim 1, characterized in that, The optical processing module includes at least two first optical processing units; The first optical processing unit includes a first reflective element and a transmissive element; The transflective element is used to receive the first light emitted from the light source and to emit the second light transmitted through the transflective element; The first reflective element is used to receive the first light reflected by the transflective element and to emit the second light.

3. The light source device according to claim 1, characterized in that, The light processing module includes at least two second light processing units; Each of the second light processing units includes a first refractive element and a second refractive element; The first refractive element is used to receive the first light and emit the third light refracted by the first refractive element; The second refractive element is used to receive the third light and emit the second light refracted by the second refractive element.

4. The light source device according to claim 1, characterized in that, The optical processing module includes at least two third optical processing units; Each of the third light processing units includes a second reflective element; the second reflective element is used to receive the first light and emit the second light reflected by the second reflective element; The spacing between adjacent second reflective elements in the direction perpendicular to the light propagation of the first light is smaller than the spacing between adjacent beams contained in the first light.

5. The light source device according to claim 1, characterized in that, The optical processing module includes a fourth optical processing unit; The fourth optical processing unit includes a third reflective element and at least two third refractive elements arranged at intervals; The third reflective element is used to receive the first light and emit a fourth light reflected by the third reflective element. The third refractive element is used to receive a portion of the fourth light and emit the fifth light; the remaining fourth light is emitted directly. The fifth light is mixed with the adjacent, directly incident fourth light to form the second light.

6. The light source device according to claim 1, characterized in that, The light source device includes at least two light sources; The light processing module includes at least two light processing units, which are one of a first light processing unit, a second light processing unit, and a third light processing unit; each light processing unit is configured in a one-to-one correspondence with the light source. The light source device further includes a light combining module; the light combining module is disposed on the light propagation path of the second light, and is used to receive each of the second light beams and emit a mixed light after the second light beams have been processed by light combining.

7. The light source device according to claim 1, characterized in that, The light source device includes at least two light sources and a light combining module; The light combining module is disposed on the propagation path of the first light, and is used to receive each of the first light beams and output at least two columns of mixed light after the first light beams have been processed by light combining. The optical processing module includes at least two second optical processing units, which are used to receive a column of the mixed light and output a column of second light after the mixed light has been processed by the second optical processing unit.

8. The light source device according to claim 1, characterized in that, The light source device includes at least two light sources; one of the at least two light sources is a red light source. The light processing module includes a fourth light processing unit, which is used to receive at least two beams of red light emitted from the red light source and to emit at least two beams of red light whose light propagation paths have been changed by the fourth light processing unit. The light source device further includes a light combining module, which is disposed on the propagation path of the second light and the propagation path of the remaining first light except for the red light, for receiving each of the first light and each of the second light, and outputting the mixed light of each of the first light and the second light after light combining processing.

9. The light source device according to any one of claims 6-8, characterized in that, The light source device also includes a light-uniformation module; The uniform light module is disposed on the propagation path of the mixed light and is used to propagate the mixed light and perform multiple internal reflections on the mixed light in the direction of travel of the mixed light.

10. A lighting system, characterized in that, Includes the light source device as described in any one of claims 1-9.

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