Lens, light source module and lamp

Abstract

The invention relates to the technical field of lighting equipment, and provides a lens, a light source module and a luminaire. The lens is of a rotational symmetry structure, the bottom of the lens is provided with a concave optical cavity, the top wall of the optical cavity forms a first light inlet face, the side wall of the optical cavity forms a second light inlet face, the side face of the lens is an inner reflection face, and the top face of the lens is a light outlet face; the light-out surface comprises a central area matched with the first light-in surface and a peripheral area surrounding the central area, and the peripheral area is provided with a microstructure. According to the lens provided by the invention, the initial light is refracted by the first light incident surface to form the first light, the first light is emitted through the central area, the initial light is refracted by the second light incident surface to form the second light, and the second light is reflected to the peripheral area through the inner reflecting surface and is refracted by the microstructure to be emitted. The emergent angle of the first light is smaller than that of the second light. The problems that light spots are obvious and glare is serious in the light emitting process are solved, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting devices, and in particular, to a lens, a light source module, and a lamp. Background Art

[0002] With the increasing improvement of people's living standards, people pay more and more attention to the quality of life. Soft lighting will add beauty to the environment and create a more wonderful visual feast. However, since the commonly used LED light-emitting chips generally emit direct light, and the central light intensity is the maximum value, it is very easy to cause obvious central light spots and it is difficult to irradiate a soft light spot. In addition, due to the light-emitting characteristics of the LED chips, the glare of the LED light-emitting chips is very serious and difficult to control.

[0003] Based on the above problems, it is urgent to propose a lens to solve the problems of light spots and glare existing in the existing lighting process and reduce the user experience. Summary of the Invention

[0004] The present invention provides a lens, a light source module, and a lamp to solve the problems of light spots and glare existing in the existing lighting process.

[0005] In a first aspect, the present invention provides a lens, including:

[0006] The lens has a rotationally symmetric structure. The bottom of the lens is provided with an inwardly concave optical cavity. The top wall of the optical cavity forms a first light incident surface, and the side wall of the optical cavity forms a second light incident surface. The side surface between the top and the bottom of the lens is an internal reflection surface. The top surface of the lens is a light exit surface. The light exit surface includes a central region adapted to the first light incident surface and an outer peripheral region surrounding the central region. The outer peripheral region is provided with microstructures;

[0007] Wherein, the optical cavity is used to accommodate a light source module. The initial light rays emitted by the light source module are respectively incident into the lens through the first light incident surface and the second light incident surface. The initial light rays are refracted by the first light incident surface to form first light rays, and the first light rays are emitted through the central region. The initial light rays are refracted by the second light incident surface to form second light rays. The second light rays are reflected by the internal reflection surface to the outer peripheral region and are emitted through the refraction of the microstructures. Moreover, the emission angle of the first light rays is smaller than the emission angle of the second light rays.

[0008] Optionally, the microstructures include a plurality of microstructure groups. The microstructure groups are arranged on the outer peripheral region and are annularly arranged outside the central region. The plurality of microstructure groups are sequentially arranged from the central region to the edge of the light exit surface.

[0009] Optionally, the micro-structure group includes a plurality of micro-structure units, and the plurality of micro-structure units are arranged in a circle around the central region. Each micro-structure unit includes an inclined sub-light-emitting surface and a side portion intersecting with the sub-light-emitting surface. In any two groups of the micro-structure groups, the sub-light-emitting surfaces of the micro-structure units in one group have different slopes from those of the micro-structure units in the other group.

[0010] Optionally, the angle between the sub-light-emitting surface and the horizontal plane is 10 to 15°.

[0011] Optionally, the sub-light-emitting surface is an arc-shaped light-emitting surface.

[0012] Optionally, the size of each micro-structure unit in the extending direction of the peripheral region is 0.2 to 1 mm.

[0013] Optionally, the side portion is arranged close to the central region.

[0014] Optionally, the first light-incident surface is a Fresnel surface.

[0015] In a second aspect, the present invention further provides a light source module, including a light source module and the above-mentioned lens. The light source module includes an LED light source; the light source module is disposed in the optical cavity, and the second light ray is deflected in a direction close to the optical axis of the LED light source.

[0016] In a third aspect, the present invention further provides a lamp, including: a housing, a driving module, and a lighting module. The lighting module and the driving module are disposed in the housing, and the driving module and the lighting module are electrically connected.

[0017] For a lens, a light source module, and a lamp provided by the present invention, by providing the lens, the initial light rays emitted by the light source module are respectively incident into the lens through the first light-incident surface and the second light-incident surface, so that the initial light rays are refracted by the first light-incident surface to form a first light ray, and the first light ray is emitted through the central region. The initial light rays are refracted by the second light-incident surface to form a second light ray, and the second light ray is reflected by the internal reflection surface to the peripheral region and is emitted through the refraction of the micro-structure. Moreover, the emission angle of the first light ray is smaller than that of the second light ray. By performing two refractions on the second light ray and then emitting it from the light-emitting surface, the direct emission of the second light ray is avoided, thereby effectively preventing the generation of light spots and improving the problems of obvious light spots and serious glare during the light emission process, and enhancing the user experience. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of lens light irradiation provided by the present invention;

[0020] Figure 2 It is one of the overall schematic diagrams of the lens provided by the present invention;

[0021] Figure 3 It is another overall schematic diagram of the lens provided by the present invention;

[0022] Figure 4 It is a schematic cross-sectional view of the A-A plane of the lens provided by the present invention;

[0023] Figure 5 It is a schematic cross-sectional view of the B-B plane of the lens provided by the present invention.

[0024] Reference numerals:

[0025] 1. Lens; 11. Light source module; 111. LED light source; 112. Circuit board; 121. Optical cavity; 122. First light incident surface; 1221. First light ray; 123. Second light incident surface; 1231. Second light ray; 124. Light exit surface; 1241. Central region; 1242. Peripheral region; 125. Microstructure; 1251. Microstructure group; 1252. Microstructure unit; 1253. Sub-light exit surface; 1254. Side part; 126. Internal reflection surface; 2. Optical module. Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] Reflective glare is the secondary light reflected from the light source to the eyes by the object, generally called reflection. This kind of glare is the most common and has the greatest impact on comfort, because it occurs at the angle where the incident angle (the angle of projection from the light source to the viewing device) is equal to the reflection angle (the reflection angle reflected to the eyes). Therefore, it cannot be avoided under normal circumstances. Reflective glare will blur the image and reduce the user experience.

[0030] In view of the above problems, the following will be combined with Figures 1-5 Describe the lens 1, the light source module 11 and the lamp provided by the present invention.

[0031] In the first aspect, the present invention provides a lens 1, as Figure 1 and Figure 2As shown, the lens 1 has a rotationally symmetric structure. An inwardly concave optical cavity 121 is provided at the bottom of the lens 1. A first light incident surface 122 is formed on the top wall of the optical cavity 121, and a second light incident surface 123 is formed on the side wall of the optical cavity 121. The side surface between the top and the bottom of the lens 1 is an internal reflection surface 126, and the top surface of the lens 1 is a light exit surface 124. The light exit surface 124 includes a central region 1241 adapted to the first light incident surface 122 and an outer region 1242 surrounding the central region 1241. The outer region 1242 is provided with microstructures 125. Among them, the optical cavity 121 is used to accommodate the light source module 11. The initial light rays emitted by the light source module 11 are incident into the lens 1 through the first light incident surface 122 and the second light incident surface 123 respectively. The initial light rays are refracted by the first light incident surface 122 to form first light rays 1221, and the first light rays 1221 are emitted through the central region 1241. The initial light rays are refracted by the second light incident surface 123 to form second light rays 1231. The second light rays 1231 are reflected by the internal reflection surface 126 to the outer region 1242 and are emitted through the refraction of the microstructures 125. Moreover, the emission angle of the first light rays 1221 is smaller than that of the second light rays 1231.

[0032] Specifically, the propagation direction of the light rays is as Figure 1 shown. The light source module 11 is placed in the optical cavity 121 at the bottom of the lens 1 to emit light rays. The initial light rays enter the lens 1 from the bottom of the lens 1. Due to the special structural arrangement of the lens 1, the incident light rays are divided into first light rays 1221 and second light rays 1231. The light exit surface 124 for emission is also divided into two regions. Among them, after the initial light rays are refracted by the first light incident surface 122 to form first light rays 1221, they are collimated and then emitted parallel from the central region 1241 of the light exit surface 124. After the initial light rays are refracted by the second light incident surface 123, they are collimated and emitted to the internal reflection surface 126. After being reflected on the internal reflection surface 126, the propagation direction of the light path is changed, and they are emitted through the microstructures 125 on the outer region 1242 of the light exit surface 124. Since the second light rays 1231 are refracted twice and then emitted through the microstructures 125, the emission angle of the first light rays 1221 is smaller than that of the second light rays 1231. By changing the propagation paths of some of the light beams and changing their emission angles, the vertical height of the emitted light rays irradiating the external object is higher and the light intensity of the emitted light spot is more uniform, improving the utilization rate of the light rays emitted by the light source module 11.

[0033] Moreover, since the direct emission of light easily leads to the formation of glare and light spots, the second light ray 1231 emitted by the light source module 11 enters from the second light incident surface 123, reaches the internal reflection surface 126 after collimated emission, is reflected by the internal reflection surface 126, and then exits from the light exit surface 124. On the light exit surface 124, the emission angle of the first light ray 1221 is smaller than that of the second light ray 1231. By refracting the second light ray 1231 twice and then emitting it through the microstructure 125, the direct emission of the second light ray 1231 is avoided, thereby effectively preventing the generation of light spots and improving the problems of obvious light spots and serious glare existing in the process of light emission.

[0034] It should be noted that a concave optical cavity 121 is provided at the bottom of the lens 1. On the one hand, it is used to facilitate the placement of the light source module 11, and on the other hand, it is used to maximize the utilization of space. In addition, the optical cavity 121 plays a role in converging light rays during the process of propagating light rays from an optically denser medium to an optically thinner medium.

[0035] Furthermore, in this embodiment, the internal reflection surface 126 is a total reflection surface. Using the principle of total reflection, since the medium of the lens 1 is usually an optically denser medium relative to air, setting the internal reflection surface 126 as a total reflection surface can ensure the utilization efficiency of the entire light ray, minimizing the light loss and maximizing the light utilization rate when the light rays transmitted inside the lens 1 are projected onto the light exit surface 124.

[0036] In some embodiments, as Figure 1 and Figure 2 shown, according to different usage requirements of users, the central region 1241 and the peripheral region 1242 can be set to different ratios. When the area of the central region 1241 is too large, the number of first light rays 1221 emitted from the central region 1241 increases, and there will be a problem of too large light spots formed by the light rays. Therefore, it is necessary to adjust the light emission angle of the peripheral region 1242 and reduce the slope of the peripheral region 1242 to ensure that the light intensity emitted from the light exit surface 124 is more uniform and improve the user experience.

[0037] Correspondingly, when the area of the central region 1241 is too small, the number of first light rays 1221 emitted from the central region 1241 is small, and there is a problem of glare. At this time, it is necessary to adjust the light emission angle of the peripheral region 1242 and increase the slope of the peripheral region 1242 to avoid the blurring of the line of sight caused by reflected glare.

[0038] It can be understood that according to different requirements, the sizes of the central region 1241 and the peripheral region 1242 can be adjusted accordingly, and the specific values are not specifically limited in the present invention.

[0039] In a specific embodiment, the initial light rays incident from the first light incident surface 122 are directly emitted from the central region 1241, while the initial light rays incident from the second light incident surface 123 first undergo refraction to reach the internal reflection surface 126. After the first change in direction at the internal reflection surface 126, they are then emitted onto the microstructure 125 in the peripheral region 1242. The microstructure 125 has a preset slope, and the light rays undergo refraction on the microstructure 125 and finally exit, causing the second light ray 1231 to exit after two reflections, thereby expanding (or shrinking) the range of the exit light spot and making the light exit intensity more uniform.

[0040] Optionally, as Figure 1 and Figure 2 shown, a concave optical cavity 121 is provided at the bottom of the lens 1, and the optical cavity is composed of a series of concentric circles. By processing the bottom of the lens 1 to form concentric rings while retaining the curvature of the surface, the refraction effect on light rays is achieved.

[0041] Specifically, as Figure 5 shown, the optical cavity 121 is formed by three annular grooves. According to different usage requirements of users, the annular grooves can also be set to other different numbers. The more the number of grooves is set, the more times the light rays are refracted. This embodiment does not make specific limitations in this regard.

[0042] According to the lens 1 provided by the embodiment of the present invention, as Figure 2 and Figure 3 shown, the microstructure 125 and the lens 1 are integrally provided.

[0043] In some embodiments, the microstructure 125 can be engraved on the lens 1 to form an integral body with the lens 1, avoiding the change in the angle of the microstructure 125 during the movement of the lens 1, which may lead to uneven light exit intensity and thus cause the problem of glare for users during use.

[0044] It can be understood that the microstructure 125 is engraved on the surface of the lens 1, and the number of engraved microstructures 125 can be adjusted accordingly according to different usage situations. This embodiment does not make specific limitations in this regard.

[0045] In other embodiments, the microstructure 125 can also be adhesively attached to the lens 1. Correspondingly, the microstructure 125 is adhesively attached to the surface of the lens 1, and its inclination angle and number depend on the specific usage requirements of users for light rays. This is not specifically limited in this regard.

[0046] According to the lens 1 provided by the present invention, as Figure 2As shown, the microstructure 125 includes a plurality of microstructure groups 1251. The plurality of microstructure groups 1251 are disposed on the peripheral region 1242 and are arranged in a ring outside the central region 1241. The plurality of microstructure groups 1251 are sequentially arranged from the central region 1241 to the edge of the light-emitting surface 124.

[0047] Specifically, the plurality of microstructure groups 1251 are all disposed on the peripheral region 1242. The plurality of microstructure groups 1251 are centered on the central region 1241 and are sequentially and continuously arranged in a ring outside the central region 1241. The angles formed by the plurality of microstructure groups 1251 with the horizontal line are different. Since the included angles of the plurality of microstructure groups 1251 with the horizontal line are different, they are visually distributed in a stepped manner. Different microstructure groups 1251 change the light-emitting angles differently. According to the specific requirements of customers, by setting the slopes of the microstructure groups 1251 to different values, the irradiation angle of the light can be adjusted more precisely, and the problems of glare and light spots can be avoided.

[0048] It should be noted that as Figure 2 shown, six microstructure groups 1251 are schematically provided in the present invention, and the slopes of the six microstructure groups 1251 are different from each other. For example, the six microstructure groups 1251 are sequentially set as the first microstructure group, the second microstructure group, the third microstructure group, the fourth microstructure group, the fifth microstructure group, and the sixth microstructure group, and the slopes of the first to sixth microstructure groups are sequentially set as a, b, c, d, e, and f. Among them, a > b > c > d > e > f.

[0049] It can be understood that according to different usage requirements, the number of the microstructure groups 1251 can also be set to other numbers. The more the microstructure groups 1251 are provided, the better the reflection effect and the higher the control accuracy of the light angle. No specific limitation is made thereto.

[0050] Furthermore, each microstructure group 1251 includes a plurality of microstructure units 1252. The plurality of microstructure units 1252 are arranged in a circle around the central region 1241. Each microstructure unit 1252 includes an inclined sub-light-emitting surface 124 and a side portion 1254 intersecting with the sub-light-emitting surface 1253. Among any two groups of microstructure groups 1251, the sub-light-emitting surfaces 1253 of the microstructure units 1252 in one group have different slopes from those of the sub-light-emitting surfaces 1253 of the microstructure units 1252 in the other group.

[0051] Specifically, the slopes between the closely arranged microstructure units 1252 in each microstructure group 1251 are the same. By arranging the microstructure units 1252 circumferentially around the central region 1241, it is ensured that when the light irradiates on the microstructure units 1252, the light can be emitted more uniformly, and the light intensity of the light spot is more uniform.

[0052] It can be understood that, according to the size of the lens 1, the number of the microstructure units 1252 can be adjusted accordingly. The more the microstructure units 1252 are provided, the better the reflection effect is, and the higher the accuracy of the light angle control is. The specific number of the microstructure units 1252 is not specifically limited in this embodiment.

[0053] When the area where the light rays emitted by the user need to illuminate is larger, the direction of the sub-emitting surface 1253 is set to be inclined to the right. The first light ray 1221 emitted from the central region 1241 is emitted towards the center, and the second light ray 1231 emitted from the microstructure 125 diffuses around, ensuring that the intensity of the light rays emitted from the emitting surface 124 is more uniform and the illumination area is larger.

[0054] Correspondingly, when the light rays emitted by the user need to be more concentrated, the direction of the sub-emitting surface 1253 is set to be inclined to the left at this time. The first light ray 1221 emitted from the central region 1241 is emitted towards the central position, and the second light ray 1231 emitted from the microstructure 125 also converges at the center. While making the emitted light rays converge at a point, the intensity of the light rays emitted is more uniform, preventing the appearance of light spots.

[0055] According to the lens 1 provided by the present invention, as Figure 1 shown, the side part 1254 is arranged at one end of the sub-emitting surface 1253 close to the central region 1241, and the included angle between the sub-emitting surface 1253 and the horizontal plane is 10 to 15°. Its inclination depends on the intensity of the first light ray 1221 emitted from the central region 1241 and the intensity of the second light ray 1231 emitted from the sub-emitting surface 1253.

[0056] When it is necessary to avoid glare as much as possible, the included angle between the sub-emitting surface 1253 and the horizontal plane can be increased, and the included angle between the sub-emitting surface 1253 and the horizontal plane is controlled to be 15°. When it is necessary to increase the intensity of the light, the included angle between the sub-emitting surface 1253 and the horizontal plane can be decreased, and the included angle between the sub-emitting surface 1253 and the horizontal plane is controlled to be 10°.

[0057] According to the lens 1 provided by the present invention, as Figure 1 shown, the sub-emitting surface 1253 is an arc-shaped emitting surface 124.

[0058] This arc-shaped emitting surface 124 is concave downward, which can greatly change the refraction angle of the light rays, thereby further solving the problems of obvious light spots and serious glare during the emission of the light.

[0059] The arc-shaped light-emitting surface 124 is concave downward, which can greatly change the refraction angle of light, thereby further solving the problems of obvious light spots and serious glare during the light emission process. At the same time, this design also helps to improve the utilization rate of light, enabling the light to be more evenly dispersed when hitting the object surface, reducing the light and shadow contrast, and reducing the formation of shadows.

[0060] In addition, the design of the arc-shaped light-emitting surface 124 can also be adjusted according to specific requirements. For example, in a scene where lighting needs to be emphasized, the concave degree of the arc-shaped light-emitting surface can be appropriately reduced, making the change in the refraction angle of light more gentle, thereby expanding the lighting range. In a situation where strict control of light spots and glare is required, the concave degree of the arc-shaped light-emitting surface can be increased to further improve the accuracy of light refraction and achieve refined lighting.

[0061] In summary, the arc-shaped light-emitting surface design has broad application prospects in the lighting field. By reasonably adjusting the light refraction angle, problems such as obvious light spots and serious glare during lighting can be effectively solved, and the lighting effect can be improved.

[0062] In addition, the sub-light-emitting surface 1253 can be set as the arc-shaped light-emitting surface 124, and at the same time, the light-emitting surface 124 can be set as the arc-shaped light-emitting surface 124, so that the amplitude of the change in the outgoing angle of the refracted light is greater, and the control of the light intensity is more accurate.

[0063] Furthermore, the size of each microstructural unit 1252 in the extending direction of the peripheral region 1242 is 0.2 - 1 mm. The microstructural unit 1252 plays an important role in the overall design. Its size in the extending direction of the peripheral region 1242 is 0.2 - 1 mm, and this size range can be adjusted according to the actual application scenario. In addition, the shape of the microstructural unit 1252 can also be customized according to user needs to meet various usage requirements.

[0064] In addition, the arrangement pattern of the microstructural units 1252 also affects the overall performance. A reasonable arrangement pattern can improve the utilization rate of the microstructural units 1252 and further optimize the performance of the material. During the design process, technical means such as computer simulation can be used to predict and optimize the arrangement pattern of the microstructural units 1252 to achieve the best performance.

[0065] In the actual production process, microstructural units 1252 with different shapes and sizes can be prepared by various methods. For example, by using microelectronic processes, laser engraving, chemical etching and other methods, precise control of the shape and size of the microstructural units 1252 can be achieved. At the same time, the arrangement pattern of the microstructural units 1252 can also be regulated by adjusting the preparation process.

[0066] According to the lens 1 provided by the present invention, the first light incident surface 122 is a Fresnel surface.

[0067] Specifically, the Fresnel region is annular, and the Fresnel structure can refract and reflect light rays accordingly, thereby forming a specific optical effect. This structure can better control the transmission and focusing of light, improving the efficiency and accuracy of the optical system.

[0068] Furthermore, the cross-section of the Fresnel surface consists of a series of zigzag grooves, and the central part is an elliptical arc. Each groove has a different angle from the adjacent groove, but all concentrate the light rays in one place to form a central focus. Each groove can be regarded as an independent small lens 1, which adjusts the light rays into parallel light or convergent light.

[0069] It should also be noted that the lens 1 in the embodiment of the present invention is a total internal reflection lens 1. In this total internal reflection lens 1, except for the incident surface and the light exit surface 124, other surfaces are designed to deflect light rays in accordance with the law of total reflection, so that the light utilization efficiency can be maximized.

[0070] Furthermore, the material of the lens 1 in the embodiment of the present invention can be polymethyl methacrylate (PMMA) material or polycarbonate (PC) material.

[0071] In a second aspect, the embodiment of the present invention further provides a light source module 11, including the light source module 11 and the above-mentioned lens 1. The light source module 11 includes an LED light source 111. The light source module 11 is disposed in the optical cavity 121, and the second light ray 1231 deflects in the direction of the optical axis close to the LED light source 111.

[0072] Specifically, the LED light source 111 is disposed on the circuit board 112. The circuit board 112 is used to supply power to the LED light source 111. The LED light source 111 is used to emit light rays. The selection of the LED light source 111 has the advantages of small volume, long life, high efficiency, etc.

[0073] The second light ray 1231 emitted by the LED light source 111 enters from the second light incident surface 123, reaches the internal reflection surface 126 after collimation and emission, is reflected by the internal reflection surface 126, and then exits from the light exit surface 124. On the light exit surface 124, the exit angle of the first light ray 1221 is smaller than the exit angle of the second light ray 1231. By refracting the second light ray 1231 twice and then emitting it through the microstructure 125, the direct emission of the second light ray 1231 is avoided, thereby effectively preventing the generation of light spots.

[0074] It should be noted that the deflection angle of the second light ray 1231 deflecting in the direction of the optical axis close to the light source is 40 - 50°.

[0075] A light source module 11 provided by the present invention refracts the second light twice and then emits it from the light-emitting surface, avoiding direct emission of the second light, thereby effectively preventing the generation of light spots and improving the problems of obvious light spots and serious glare during the light emission process, and enhancing the user experience.

[0076] In a third aspect, an embodiment of the present invention further provides a lighting fixture, including a housing, a driving module, and the above-mentioned light source module 11. The light source module 11 and the driving module are arranged in the housing, and the driving module is electrically connected to the light source module 11.

[0077] Specifically, a receiving cavity for placing the driving module and the light source module 11 is arranged in the housing. The driving module and the light source module 11 are both electrically connected to the circuit board 112. The driving module is used to send an instruction to turn on (or turn off) the light source module 11 to the light source module 11. After receiving the instruction, the light source module 11 emits light according to the user's usage requirements.

[0078] It can be understood that the lighting device is fixedly arranged on an external device, and the external device can be set as a lamp post, a wall, or other devices, which is not specifically limited herein. The light source module 11 and the lens 1 can be fixedly arranged on the external device to achieve diversification of usage scenarios.

[0079] A lighting fixture provided by an embodiment of the present invention refracts the second light twice and then emits it from the light-emitting surface, avoiding direct emission of the second light, thereby effectively preventing the generation of light spots and improving the problems of obvious light spots and serious glare during the light emission process, and enhancing the user experience.

[0080] It can be understood that the lighting fixture in the embodiment of the present invention can be a table lamp, a chandelier, a wall washer lamp, or a series of other lighting fixtures, which is not specifically limited herein.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention 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 for some of the technical features. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lens (1), characterized in that, Comprising: The lens (1) has a rotationally symmetric structure. An inwardly concave optical cavity (121) is provided at the bottom of the lens (1). A first light incident surface (122) is formed on the top wall of the optical cavity (121), and a second light incident surface (123) is formed on the side wall of the optical cavity (121). The side surface between the top and bottom of the lens (1) is an internal reflection surface (126), and the top surface of the lens (1) is a light exit surface (124). The light exit surface (124) includes a central region (1241) adapted to the first light incident surface (122) and a peripheral region (1242) surrounding the central region (1241). The peripheral region (1242) is provided with microstructures (125). Wherein, the optical cavity (121) is used to accommodate a light source module (11). The initial light rays emitted by the light source module (11) are incident into the lens (1) through the first light incident surface (122) and the second light incident surface (123) respectively. The initial light rays are refracted by the first light incident surface (122) to form first light rays (1221), and the first light rays (1221) are emitted through the central region (1241). The initial light rays are refracted by the second light incident surface (123) to form second light rays (1231), and the second light rays (1231) are reflected by the internal reflection surface (126) to the peripheral region (1242) and are refracted and emitted through the microstructures (125). And, the emission angle of the first light rays (1221) is smaller than the emission angle of the second light rays (1231).

2. The lens (1) according to claim 1, characterized in that, The microstructures (125) include a plurality of microstructure groups (1251). The microstructure groups (1251) are arranged on the peripheral region (1242) and are arranged in a ring outside the central region (1241). The plurality of microstructure groups (1251) are arranged in sequence from the central region (1241) as the center to the edge of the light exit surface (124).

3. The lens (1) according to claim 2, characterized in that, Each microstructure group (1251) includes a plurality of microstructure units (1252). The plurality of microstructure units (1252) are arranged in a circle around the central region (1241). Each microstructure unit (1252) includes an inclined sub-light exit surface (1253) and a side portion (1254) intersecting with the sub-light exit surface (1253). Among any two groups of the microstructure groups (1251), the sub-light exit surfaces (1253) of the microstructure units (1252) in one group have different slopes from the sub-light exit surfaces (1253) of the microstructure units (1252) in the other group.

4. The lens (1) according to claim 3, characterized in that, The angle between the sub-light exit surface (1253) and the horizontal plane is 10 to 15°.

5. The lens (1) according to claim 4, characterized in that, The sub-light exit surface (1253) is an arc-shaped light exit surface (124).

6. The lens (1) according to claim 5, characterized in that, The size of each microstructure unit (1252) in the extending direction of the peripheral region (1242) is 0.2 to 1 mm.

7. The lens (1) according to any one of claims 3 to 6, characterized in that, The side portion (1254) is arranged close to the central region (1241).

8. The lens (1) according to any one of claims 1 to 6, characterized in that, The first light incident surface (122) is a Fresnel surface.

9. A lighting module (2), characterized in that, Comprising: Light source module (11), including an LED light source (111); The lens (1) according to any one of claims 1 to 8, wherein the light source module (11) is disposed in the optical cavity (121), and the second light ray (1231) deflects in the direction of the optical axis closer to the LED light source (111).

10. A lighting fixture, characterized in that, Comprising: A housing, a driving module, and a lighting module (2) according to claim 9, wherein the lighting module (2) and the driving module are disposed in the housing, and the driving module is electrically connected to the lighting module (2).

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