A light distribution lens, a lighting fixture, and a lighting module

Abstract

The present application discloses a light distribution lens, a lighting fixture and a lighting module, relating to the technical field of lighting. Among them, the light distribution lens includes a plurality of strip-shaped optical elements distributed in an array. Each strip-shaped optical element includes a first end face and a second end face arranged opposite to each other, and a reflecting surface located between the first end face and the second end face. The first end face is smaller than the second end face. The light incident surface of the light distribution lens is formed by the first end faces of the strip-shaped optical elements, and the light exiting surface of the light distribution lens is formed by the second end faces of the strip-shaped optical elements. Light enters each strip-shaped optical element in the light distribution lens from the light incident surface of the light distribution lens, and after being reflected at least once by the reflecting surface of each strip-shaped optical element, it exits from the light exiting surface of each light distribution lens, meeting the light distribution requirements of light-emitting elements with different sizes of light exiting surfaces.

Description

Technical Field

[0001] This application relates to the field of lighting technologies, and particularly to a light distribution lens, a lighting fixture, and a lighting module. Background Art

[0002] LED (Light Emitting Diode) has been increasingly widely used due to its many mature advantages, such as power saving, high efficiency, high response speed, long lifespan, etc. Existing spotlights mainly adopt the solutions of combining an LED with a TIR (Total Internal Reflection) lens or combining an LED with a reflector. However, in these two spotlight solutions, the TIR lens or the reflector can only be adapted to a specific size of the LED light-emitting element. For example, once the model of the LED light-emitting element is changed or the size of the light-emitting surface of the light-emitting element is changed, the structures such as the TIR lens or the reflector in the spotlight need to be correspondingly adjusted to ensure the consistency of the light distribution angle. Summary of the Invention

[0003] The main purpose of this application is to provide a light distribution lens, a lighting fixture, and a lighting module to solve the problem that the light distribution lens in the existing lighting fixture needs to be adapted to a light-emitting element of a specific size.

[0004] In a first aspect, an embodiment of this application provides a light distribution lens, including a plurality of strip-shaped optical elements distributed in an array. Each of the strip-shaped optical elements includes a first end face and a second end face arranged oppositely, and a reflection face located between the first end face and the second end face. The first end face is smaller than the second end face; the light incident surface of the light distribution lens is formed by the first end faces of the strip-shaped optical elements, and the light exit surface of the light distribution lens is formed by the second end faces of the strip-shaped optical elements; wherein, light enters each of the strip-shaped optical elements in the light distribution lens from the light incident surface of the light distribution lens, and after being reflected at least once by the reflection face of each of the strip-shaped optical elements, it exits from the light exit surface of each of the light distribution lenses, realizing the light distribution of the light.

[0005] Optionally, in a possible implementation manner, the first end face and the second end face are polygons, or the first end face and the second end face are circles.

[0006] Optionally, in a possible implementation manner, each of the strip-shaped optical elements is the same, and adjacent strip-shaped optical elements are in contact through the outer surfaces of the first end face and the second end face.

[0007] Optionally, in a possible implementation manner, the light distribution angle x of the light distribution lens is Wherein, a is the light-emitting angle of the light-emitting element that emits the light, D is the size of the second end face, and d is the size of the first end face.

[0008] Optionally, in a possible implementation manner, the length l of the light distribution lens is Wherein, D is the size of the second end face, d is the size of the first end face, m is the number of strip-shaped optical elements in the light distribution lens, b is the included angle between the first end face of the strip-shaped optical element and the reflecting surface, and can be obtained by solving, n is the number of reflections of the light after entering the strip-shaped optical element, n > 2, and x is the predetermined light distribution angle.

[0009] Optionally, in a possible implementation manner, the number z of the strip-shaped optical elements in the light distribution lens is Wherein, z is an integer, s is the size of the light-emitting surface of the light-emitting element that emits the light, and d is the size of the first end face.

[0010] Optionally, in a possible implementation manner, the light distribution lens further includes a plurality of claddings corresponding to each of the strip-shaped optical elements one by one, and each of the claddings is sleeved on each of the strip-shaped optical elements, wherein the refractive index of the cladding is less than the refractive index of the strip-shaped optical element.

[0011] Optionally, in a possible implementation manner, adjacent claddings are fixed by bonding.

[0012] Optionally, in a possible implementation manner, a cladding is sleeved on the outer periphery of the light distribution lens, wherein the refractive index of the cladding is less than the refractive index of the strip-shaped optical element.

[0013] Optionally, in a possible implementation manner, the strip-shaped optical element is a light homogenizing integrating rod.

[0014] In a second aspect, an embodiment of the present application further provides a lighting fixture, including a light-emitting element and the foregoing light distribution lens, wherein the light-emitting element is located at the light-incident surface of the light distribution lens. The light emitted by the light-emitting element enters each of the strip-shaped optical elements in the light distribution lens through the light-incident surface of the light distribution lens, and after at least one reflection by each of the strip-shaped optical elements, it is emitted from the light-emitting surface of the light distribution lens.

[0015] Optionally, in a possible implementation manner, the lighting fixture further includes a housing with openings at both ends, and the housing is sleeved on the light distribution lens.

[0016] Optionally, in a possible implementation, the opening shape of the open end of the housing matches the shape of the light-emitting surface of the light distribution lens, and the open end is the end close to the light-emitting surface of the light distribution lens.

[0017] In a third aspect, an embodiment of the present application provides an illumination module, including a plurality of the foregoing illumination lamps.

[0018] Optionally, in a possible implementation, the plurality of illumination lamps are distributed in a circular array or the plurality of illumination lamps are distributed in a linear array.

[0019] The above at least one technical solution adopted in the embodiment of the present application can achieve the following beneficial effects:

[0020] In the light distribution lens, illumination lamp, and illumination module provided in this embodiment, the light-emitting surface of the light-emitting element of the emitted light can be equivalently divided into a plurality of small light-emitting surfaces by a plurality of strip-shaped optical elements constituting the light distribution lens, and then light distribution is achieved by using each strip-shaped light-emitting element corresponding to the small light-emitting surface one by one, so that the light distribution lens can be used for light distribution of light-emitting elements with light-emitting surfaces of different sizes and the light distribution angles are consistent. Description of the Drawings

[0021] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0022] Figure 1a It is a schematic structural diagram of a light distribution lens provided according to an exemplary embodiment.

[0023] Figure 1b It is a schematic structural diagram of a strip-shaped optical component provided according to an exemplary embodiment.

[0024] Figure 1c It is a top view of a light distribution lens provided according to an exemplary embodiment.

[0025] Figure 1d It is an optical path diagram when light distribution is performed by a strip-shaped optical component provided according to an exemplary embodiment.

[0026] Figure 1e It is a schematic diagram of an equivalent division result of the light-emitting surface of a light-emitting element provided according to an exemplary embodiment.

[0027] Figure 2 It is a schematic diagram of a plane equal illuminance curve corresponding to a light distribution lens provided according to an exemplary embodiment.

[0028] Figure 3a It is a schematic structural diagram of an illumination lamp provided according to an exemplary embodiment.

[0029] Figure 3b It is a schematic cross-sectional structure diagram of a lighting fixture provided according to an exemplary embodiment.

[0030] Figure 4a It is a schematic structure diagram of a lighting module provided according to an exemplary embodiment.

[0031] Figure 4b It is another schematic structure diagram of a lighting module provided according to an exemplary embodiment. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments of this application and the corresponding drawings. Apparently, the described embodiments are only a part rather than all of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of this application.

[0033] The following will, with reference to the drawings, detail the technical solutions provided by each embodiment of this application.

[0034] Please refer to Figure 1a and Figure 1b , an embodiment of this application provides a light distribution lens 10, which includes a plurality of strip-shaped optical elements 11 distributed in an array. Each of the strip-shaped optical elements 11 includes a first end face 110 and a second end face 111 oppositely arranged in the height direction, and a side wall 112 located between the first end face 110 and the second end face 111. The first end face 110 is smaller than the second end face 111. The incident surface of the light distribution lens 10 is formed by the first end faces 110 of the strip-shaped optical elements 11, and the light-emitting surface of the light distribution lens 10 is formed by the second end faces 111 of the strip-shaped optical elements. In practical applications, the aforementioned side wall 112 can serve as a reflecting surface during light distribution to reflect the light incident into the strip-shaped optical element 11. The size of the first end face 110 or the second end face 111 can be the diameter size, area size, or the diameter size of the circumscribed circle of the end face, etc., which can be specifically determined according to actual needs.

[0035] Among them, the shapes and sizes of the strip-shaped optical elements 11 can be set according to actual needs. For example, the first end face 110, the second end face 111, and the cross-section parallel to the first end face 110 and the second end face 120 in each of the strip-shaped optical elements 11 can be polygons (such as hexagons, pentagons, rhombuses, rectangles, parallelograms, etc.), or can be circles, ellipses, etc. This embodiment does not limit this here.

[0036] Meanwhile, according to the differences of the first end face 110, the second end face 111, and the cross section, the reflecting surface between the first end face 110 and the second end face 120 can be an arc surface or a plane, etc. For example, when the first end face 110, the second end face 111, and the cross section are polygons, the reflecting surface is a plane; when the first end face 110, the second end face 111, and the cross section are circular, the reflecting surface is an arc surface. This embodiment does not make specific limitations here.

[0037] In a possible implementation manner, the shapes and sizes of the respective strip-shaped optical elements 11 in the light distribution lens 10 can be as Figure 1a shown to be the same, so that the adjacent strip-shaped optical elements 11 are in contact with each other through the outer surfaces of the first end face and the second end face, that is, there are no gaps between the respective strip-shaped optical elements 11 constituting the light distribution lens 10, and further, the light emitted by the light-emitting element can enter the light distribution lens 10, so as to improve the light distribution efficiency of the light distribution lens 10 and avoid light waste.

[0038] In another implementation manner, the shapes and sizes of the respective strip-shaped optical elements 11 in the light distribution lens 10 can also be different. For example Figure 1c shown, is a possible top view of the light distribution lens 10. The light distribution lens 10 can at least include a first strip-shaped optical element 12 with a regular pentagon as the first end face and the second end face, and a second strip-shaped optical element 13 with a regular pentagon as the first end face and the second end face. In addition, the first strip-shaped optical element 12 and the second strip-shaped optical element 13 can have the same or different light distribution angles. This embodiment does not make limitations in this regard.

[0039] It should be noted that in an embodiment of the present application, the light distribution lens 10 may further include a plurality of claddings corresponding to the respective strip-shaped optical elements 11 one by one. Each cladding is respectively sleeved on the side wall 112 of each strip-shaped optical element 11. Among them, the refractive index of the cladding is less than the refractive index of the strip-shaped optical element 11. Thus, when the light entering the strip-shaped optical element 11 is reflected at least once through its side wall 112, the problem of light transmission will not occur, and the light distribution efficiency is improved. Optionally, the cladding can be made of materials such as silicon oxide. This embodiment does not make limitations in this regard.

[0040] In addition, when aggregating multiple said strip-shaped optical elements 11 to form the light distribution lens 10, it can be achieved by bonding adjacent said strip-shaped optical elements 11. Or when each said strip-shaped optical element 11 is sleeved with a cladding, the adjacent claddings can be bonded, etc. Or, a cladding can be directly sleeved on the outer periphery of the light distribution lens 10, thereby binding multiple said strip-shaped optical elements 11 into one body to form the light distribution lens 10. The refractive index of the cladding sleeved on the outer periphery of the light distribution lens 10 can be less than the refractive index of the strip-shaped optical element 11. This embodiment does not make specific limitations here.

[0041] It should be noted that when directly bonding each said strip-shaped optical element 11, the refractive index of the adhesive used needs to be less than the refractive index of the strip-shaped optical element 11. And, after completing the aggregation of each said strip-shaped optical element 11, if there are gaps between adjacent strip-shaped optical elements 11 as Figure 1c shown, the gaps can be filled with an adhesive, etc. This embodiment does not make limitations in this regard.

[0042] Furthermore, in an embodiment of the present application, the strip-shaped optical element 11 can be a solid structure or a hollow structure for multiple reflections of the light emitted by the light-emitting element. Exemplarily, taking the strip-shaped optical element 11 with a solid structure as an example here, the principle of light distribution using multiple strip-shaped optical elements 11 to form the light distribution lens 10 in this embodiment will be briefly described.

[0043] Please refer to Figure 1d , assuming that one said strip-shaped optical element 11 corresponds to one light-emitting element 14, the light-emitting angle of the light-emitting element 14 is a, the included angle (i.e., the wedge angle) between the first end face 110 of the strip-shaped optical element 11 and the reflection surface is b, the size of the first end face 110 is d, and the size of the second end face 111 is D. Then the light emitted by the light-emitting element 14 enters the strip-shaped optical element 11 through the first end face 110 and is reflected at least once by the reflection surface. Each time it is reflected, the angle of the light can be reduced by 2b. Furthermore, the light distribution angle of the light emitted from the second end face can be calculated according to the number of reflections of the light in the strip-shaped optical element 11. The light distribution angle x is x = a - 4nb, where n is the number of reflections of the light after entering the strip-shaped optical element, and n > 2.

[0044] Based on this, assuming that the light distribution angle x of the strip-shaped optical element 11 and the light-emitting angle a of the light-emitting element 14 are both predetermined, then, when ensuring that the light of each angle emitted by the light-emitting element can enter the strip-shaped optical element for at least one reflection and then be emitted, and the emitted angle is the predetermined light distribution angle x, the length of the strip-shaped optical element 11 can be calculated as where D is the size of the second end face, d is the size of the first end face, and the wedge angle b and the number of reflections n can be obtained by solving.

[0045] It should be noted that in , it is assumed that the light ray with the maximum angle emitted by the light-emitting element 14 needs to be reflected n times before being emitted from the second end face 111 (the maximum refraction times), and its emission angle is less than the predetermined light distribution angle x, so that the value ranges of the variables n and b can be solved. Among them, if the emission angle of the light ray emitted by the light-emitting element 14 is smaller than the maximum emission angle x, such as 1 degree smaller, then this light ray can be emitted after being reflected n - 1 times in the strip-shaped optical element 11 to ensure that the emission angle is less than the predetermined light distribution angle x.

[0046] However, in practical applications, if the light-emitting surface (or power) of the light-emitting element 14 is large, in order to ensure that the light rays emitted from each angle of the light-emitting element 14 can enter the strip-shaped optical element 11 and the light distribution angle remains unchanged, it is necessary to increase the first end face 110, the second end face 111, and the length of the strip-shaped optical element 11 of the strip-shaped optical element 11 at the same time. Or, if the light-emitting surface of the light-emitting element 14 is fixed, but in order to obtain a smaller light distribution angle, the number of reflections will increase, that is, the length of the strip-shaped optical element 11 needs to be increased. However, in the above two cases, if the length of the strip-shaped optical element 11 increases, it will inevitably lead to the fact that lighting fixtures such as spotlights using the light distribution lens 10 cannot meet the requirements of the lighting scene due to their too large size and poor aesthetics. For example, assuming that the light-emitting angle of the light-emitting element is 120 degrees and the predetermined light distribution angle is 24 degrees, then it can be calculated that the length of the strip-shaped optical element 11 can reach 160 mm.

[0047] In view of this, in this embodiment, the light distribution lens 10 is obtained by integrating a plurality of strip-shaped optical elements 11 as Figure 1a shown, which can not only realize the light distribution for the light-emitting element with a large light-emitting surface, keep the light distribution angle unchanged, but also will not make the length of the light distribution lens 10 too long. The specific principle is as follows: Taking the light-emitting element 14 with a large light-emitting surface as an example, assuming that the light distribution lens 10 is composed of six strip-shaped optical elements 11 with hexagonal first end faces 110 and second end faces 111, then when using the light distribution lens 10 to perform light distribution on the light rays emitted by the light-emitting element 14, as Figure 1eAs shown, it is equivalent to equivalent the light-emitting element 14 with a larger light-emitting surface F to a small light-emitting element with multiple smaller light-emitting surfaces f through the first end surface 110 of the multiple strip-shaped optical elements 11. That is, the light-emitting surface F of the light-emitting element 14 is divided into multiple small light-emitting surfaces f through the first end surface 110 of the multiple strip-shaped optical elements 11, so that one strip-shaped optical element 11 corresponds to one small light-emitting surface f, and then each strip-shaped optical element 11 performs light distribution on the light emitted from the corresponding small light-emitting surface f, so that the length of the strip-shaped optical element 11 for each small light-emitting element 14 becomes smaller to adapt to different lighting scenarios.

[0048] Based on the above, compared with using a single strip-shaped optical element 11 for light distribution, the length of the light distribution lens 10 integrated with m strip-shaped optical elements 11 in this embodiment can be shortened to 1 / m of the length of using a single strip-shaped optical element 11. That is, for the same light-emitting element 14, when light distribution is performed through the light distribution lens 10 composed of m strip-shaped optical elements 11, the length of the light distribution lens 10 can be In addition, when light distribution is performed through the light distribution lens 10 in this embodiment, the light needs to be reflected at least once when entering each strip-shaped optical element 11, which can make the emitted light uniform and there is no problem of glare.

[0049] In addition, compared with the problem in the prior art that when using a TIR lens or a reflector for light distribution, a TIR lens or a transmitter can only adapt to one specific light-emitting element. For example, for light-emitting elements with the same light-emitting angle, when increasing the light-emitting surface (power) of the light-emitting element, the light distribution angle increases, and when decreasing the light-emitting surface (power) of the light-emitting element, the light distribution angle decreases. The light distribution lens 10 composed of multiple strip-shaped optical elements 11 adopted in this embodiment, because the light distribution angle of the light distribution lens 10 is consistent with the light distribution angles of the strip-shaped optical elements 11, therefore, when the light-emitting surface (power) of the light-emitting element decreases, the light distribution angle of the light distribution lens 10 remains unchanged, and when the light-emitting surface (power) of the light-emitting element increases, the number of strip-shaped optical elements 11 in the light distribution lens 10 can be increased to achieve light distribution for the light-emitting element with a larger light-emitting surface. However, as the number of strip-shaped optical elements 11 increases, the light distribution angle and length of the light distribution lens 10 can remain unchanged. It can be seen from this that the light distribution lens 10 given in this embodiment can adapt to the light distribution requirements of light-emitting elements 14 with different sizes of light-emitting surfaces, and its light distribution angle remains unchanged, meeting the light distribution requirements of different lighting scenarios.

[0050] Furthermore, the light distribution angle of the light distribution lens 10 given in this embodiment is consistent with the light distribution angles of the strip-shaped optical elements 11 that make up the light distribution lens 10. In this embodiment, the light distribution angle x of the strip-shaped optical element 11 is Among them, a is the light-emitting angle of the light-emitting element that emits the light, D is the size of the second end face 111, and d is the size of the first end face 110. That is, the light distribution angle of the light distribution lens 10 is related to the ratio between the second end face 111 and the first end face 110 on the strip-shaped optical element 11.

[0051] For example, assuming that both the first end face 110 and the second end face 111 of the strip-shaped optical element 11 are regular hexagons, then, if the ratio of the diameter of the circumscribed circle of the second end face 111 to the diameter of the circumscribed circle of the first end face 110 is five, then the light distribution angle of the light distribution lens 10 is one-fifth of the light-emitting angle of the light-emitting element.

[0052] In practical applications, by adjusting the ratio between the light-emitting surface (the second end face 111) and the light-incident surface (the first end face 110) of the light distribution lens 10, light distribution with different light distribution angles can be achieved, such as light distribution with light distribution angles of 10 degrees, 24 degrees, 30 degrees, 60 degrees, etc. This embodiment does not limit this here.

[0053] Exemplarily, taking the first end face 110 and the second end face 111 of the strip-shaped light-emitting element 11 as polygons, the light distribution effect of the light distribution lens 10 given in this application is described. For example, Figure 2 As shown, it is a schematic diagram of a plane equal-illuminance curve obtained after light distribution using the light distribution lens 10 given in this embodiment. From Figure 2 it can be seen that the light intensity of the light obtained after light distribution by the light distribution lens 10 given in this embodiment is uniform and has a better light distribution effect. Among them, Figure 2 the "H" shown in it is the height when testing the light distribution lens 10, and "Emax" is the maximum illuminance value at the test height "H".

[0054] Furthermore, the number z of the strip-shaped optical elements 11 in the light distribution lens 10 is Among them, z is an integer, s is the size of the light-emitting surface of the light-emitting element 14 that emits the light, and d is the size of the first end face 110. That is, after the sizes of the first end face 110 and the second end face 120 of the strip-shaped optical element 11 are determined, the number of the strip-shaped light-emitting elements 11 that make up the light distribution lens 10 can be determined according to the size of the light-emitting surface of the light-emitting element 14. For example, when is an integer, such as 5, 6, etc., then z can be an integer such as 5, 6, etc. When is a decimal, such as 7.5, etc., then z can be an integer greater than 7.5, such as 8, 9, etc., to ensure that all the light emitted by the light-emitting element 14 can enter the light distribution lens 10 and avoid light waste.

[0055] In practical applications, when increasing the light-emitting surface of the light-emitting element 14, the number of strip-shaped optical elements 11 in the light distribution lens 10 can be increased to meet the light distribution requirements for the light-emitting element 14. Conversely, the number of strip-shaped optical elements 11 in the light distribution lens 10 can be reduced.

[0056] Based on the above description, the light distribution lens 10 in this embodiment is composed of a plurality of strip-shaped optical elements 11 distributed in an array, and at least has the following effects when performing light distribution:

[0057] (1) It can make the emitted light rays uniform and free of glare problems.

[0058] (2) It can avoid the problem of excessive size of the optical element caused by using a single light distribution element for light distribution in the prior art.

[0059] (3) It can achieve light distribution for light-emitting elements with different power levels or light-emitting surface sizes without changing the structure of the light distribution lens, and the light distribution angles are consistent.

[0060] Based on the foregoing light distribution lens, an embodiment of the present application further provides a lighting fixture, which at least includes a light-emitting element, a driving module, and the foregoing light distribution lens. The light-emitting element is located on the light-incident surface of the light distribution lens, and the driving module is connected to the light-emitting element to drive the light-emitting element to emit light. Among them, the lighting fixture can be used as a spot light, a downlight, etc. to achieve accent lighting.

[0061] In one implementation, the light-emitting element may at least include an LED lamp bead, a light source substrate, etc. The light-emitting element and the light distribution lens can be detachably fixed through structural members, etc., so that the light rays emitted by the light-emitting element are incident on the light distribution lens, and after at least one reflection by each strip-shaped optical element in the light distribution lens, they are emitted from the light-emitting surface of the light distribution lens, thereby completing the light distribution at a predetermined angle. Optionally, the predetermined angle can be set according to actual needs. For example, 10 degrees, 24 degrees, 60 degrees, etc.

[0062] Optionally, the light-emitting surface of the light-emitting element can be planar, so that the light-incident surface of the light distribution lens can be attached to the light-emitting surface of the light-emitting element, thereby ensuring that the light rays emitted by the light-emitting element enter the light distribution lens without loss and ensuring the light distribution effect of the light distribution lens.

[0063] In addition, the specific structure of the light distribution lens in the lighting fixture in this embodiment can refer to the detailed description of the aforementioned light distribution lens 10, and this embodiment will not elaborate further. In addition, as can be known from the description of the light distribution lens 10 above, the difference in the predetermined angle can be achieved by adjusting the ratio between the light-emitting surface and the light-incident surface of the light distribution lens, that is, adjusting the ratio between the first end surface and the second end surface of each of the strip-shaped optical elements. For example, assuming that both the first end surface and the second end surface are regular hexagons, then, if the ratio of the diameter of the circumscribed circle of the second end surface to the diameter of the circumscribed circle of the first end surface is five, then the predetermined angle is one-fifth of the light-emitting angle of the light-emitting element.

[0064] It should be noted that for the lighting fixture given in this embodiment, by equivalently dividing the light-emitting surface of the light-emitting element through each strip-shaped light-emitting element in the light distribution lens, it can be achieved that no matter how large the light-emitting surface of the light-emitting element is, the angles of the light rays obtained after light distribution through each strip-shaped optical element are consistent, and there is no large-angle stray light, effectively avoiding the problem of glare.

[0065] Furthermore, in order to avoid damage to the lighting fixture and extend the service life of the lighting fixture, and at the same time, to ensure the relative stability between the light distribution lens and the light-emitting element, in a possible implementation manner, as Figure 3a and Figure 3b shown, the lighting fixture 30 may further include a housing 31 with openings at both ends, and the housing 31 is sleeved on the light distribution lens 32.

[0066] Optionally, the shape and size of the housing 31 can be set according to actual needs. In addition, the shape of the opening at the open end of the housing 31 matches the shape of the light-emitting surface of the light distribution lens 32, and the open end is the end close to the light-emitting surface of the light distribution lens 32. For example Figure 3a and Figure 3b shown, the shape of the opening end of the housing 31 on the side close to the light-emitting surface of the light distribution lens 32 matches the shape of the light-emitting surface of the light distribution lens 32. If the shape of the light-emitting surface of the light distribution lens 32 is approximately a regular hexagon, the shape of the opening end can be a regular hexagon, etc., and this embodiment does not limit this.

[0067] In the lighting fixture given in this embodiment, by using a light distribution lens composed of a plurality of strip-shaped optical elements distributed in an array to perform light distribution on the light rays emitted by the light-emitting element, not only can the light rays emitted by the lighting fixture have the same light distribution angle, ensuring the uniformity of the emitted light rays and avoiding the problem of glare. At the same time, by equivalently dividing the light-emitting surface of the light-emitting element into a plurality of small light-emitting elements through a plurality of strip-shaped optical elements, the size of the light distribution lens is effectively reduced, improving the ornamental value of the appearance of the lighting fixture and the convenience during use.

[0068] Furthermore, with reference to Figure 4a and Figure 4b , another embodiment of the present application further provides an illumination module 40, which may include the aforementioned multiple lighting fixtures 41. In practical applications, each lighting fixture may be arranged in a circular array as Figure 4a shown, or may be arranged in a linear array as Figure 4a shown, etc. This embodiment does not limit this. It should be noted that since the specific structure of each lighting fixture in the illumination module in this embodiment can refer to the detailed description of the aforementioned lighting fixtures, this embodiment will not be elaborated herein.

[0069] The illumination module provided in this embodiment can provide uniform light, and can effectively prevent the problem of glare, and is suitable for different lighting scenarios.

[0070] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0071] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A light distribution lens, characterized in that, Comprising a plurality of strip-shaped optical elements arranged in an array, each of the strip-shaped optical elements includes a first end face and a second end face arranged oppositely, and a reflecting surface located between the first end face and the second end face, and the first end face is smaller than the second end face; The light incident surface of the light distribution lens is formed by the first end faces of the strip-shaped optical elements, and the light exit surface of the light distribution lens is formed by the second end faces of the strip-shaped optical elements; Wherein, light enters each of the strip-shaped optical elements in the light distribution lens from the light incident surface of the light distribution lens, and after at least one reflection by the reflecting surface of each of the strip-shaped optical elements, it exits from the light exit surface of each of the light distribution lenses, realizing the light distribution of the light; The number of strip-shaped optical elements in the light distribution lens is , where is an integer; The light-emitting surface size of the light-emitting element that emits the light; is the size of the first end face; The light exit surface of the light-emitting element is arranged facing the first end face; The light distribution angle of each of the strip-shaped optical elements is , where The light exit angle of the light rays emitted to each of the strip-shaped optical elements on the light-emitting element; is the size of each corresponding second end face; is the size of each corresponding said first end face; The light distribution angle of the light distribution lens is consistent with the light distribution angle of each of the strip-shaped optical elements.

2. The light distribution lens according to claim 1, wherein The first end face and the second end face are polygons, or the first end face and the second end face are circular.

3. The light distribution lens according to claim 1, characterized in that, Each of the strip-shaped optical elements is the same, and adjacent strip-shaped optical elements are in contact through the outer surfaces of the first end face and the second end face.

4. The light distribution lens according to claim 3, characterized in that, The length of the light distribution lens is , where is the size of the second end face; is the size of the first end face; m is the number of strip-shaped optical elements in the light distribution lens; is the included angle between the first end face and the reflecting surface in the strip-shaped optical element, and can be obtained by solving. is the number of reflections after the light enters the strip-shaped optical element. , is the predetermined light distribution angle.

5. The light distribution lens according to any one of claims 1-4, characterized in that, The light distribution lens further includes a plurality of claddings corresponding to the strip-shaped optical elements one by one, each of the claddings is sleeved on each of the strip-shaped optical elements, and the refractive index of the cladding is less than the refractive index of the strip-shaped optical element.

6. The light distribution lens according to claim 5, wherein, Adjacent claddings are fixed by bonding.

7. The light distribution lens according to any one of claims 1 to 4, characterized in that, The outer periphery of the light distribution lens is sleeved with a cladding, and the refractive index of the cladding is less than the refractive index of the strip-shaped optical element.

8. The light distribution lens according to any one of claims 1-4, characterized in that, The strip-shaped optical element is a light homogenizing integrating rod.

9. The light distribution lens according to claim 1, characterized in that, Among the plurality of strip-shaped optical elements, there are a plurality of first end faces with different shapes and different areas, and a plurality of second end faces with different shapes and different areas.

10. A lighting fixture, characterized in that, Comprising a light-emitting element and the light distribution lens according to any one of claims 1-9, the light-emitting element is located at the light incident surface of the light distribution lens, wherein the light emitted by the light-emitting element enters each of the strip-shaped optical elements in the light distribution lens from the light incident surface of the light distribution lens, and after at least one reflection by each of the strip-shaped optical elements, it exits from the light exit surface of the light distribution lens.

11. The lighting fixture according to claim 10, characterized in that, The lighting fixture further includes a housing with openings at both ends, and the housing is sleeved on the light distribution lens.

12. The lighting fixture according to claim 11, characterized in that, The opening shape of the open end of the housing matches the shape of the light exit surface of the light distribution lens, and the open end is the end close to the light exit surface of the light distribution lens.

13. A lighting module, characterized in that, Comprising a plurality of lighting fixtures according to any one of claims 10-12.

14. The lighting module according to claim 13, characterized in that, The plurality of lighting fixtures are distributed in a circular array, or the plurality of lighting fixtures are distributed in a linear array.

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