lighting equipment

Abstract

The present invention provides a lighting device comprising: a Rayleigh scatter plate having a light incident surface and a light emitting surface disposed opposite each other; a light-emitting assembly disposed opposite the light incident surface, the light-emitting assembly comprising a light-emitting portion and a total reflection lens, the light-emitting portion being inclined relative to the Rayleigh scatter plate; the total reflection lens being disposed at the light-emitting portion and configured to reduce the angle of emission of a light beam emitted by the light-emitting portion; and a light-shielding portion disposed between the Rayleigh scatter plate and the light-emitting assembly to shield the light-emitting assembly. The technical solution provided by the present invention can address the technical problem of existing skylights being unable to simulate the illumination characteristics of sunlight.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting devices, and in particular to a lighting device. Background Art

[0002] A new type of lighting fixture has emerged in the home lighting industry: skylights, also known as blue sky lights. Skylights in existing technologies generally come in two types. One type primarily simulates the visual effect of the sky. These skylights typically consist of an LED lamp and a Rayleigh diffuser. Light from the LED lamp enters the Rayleigh diffuser from both ends of the plate, where it undergoes Rayleigh scattering. Some of the light travels randomly within the plate and is ultimately dissipated within it, while the remaining light is emitted from the plate's light-emitting surface at a large angle.

[0003] However, this structural setup can only achieve diffuse light at large angles, but cannot achieve small-angle light emission to approximate the model of sunlight beams. Therefore, this type of sky light can only simulate the visual effect of the sky, but lacks the simulation of sunlight beams incident parallel to the skylight or window, and cannot simulate the illumination characteristics of sunlight.

[0004] Another type of skylight uses a lens and reflector to achieve nearly parallel light output, evenly irradiating the Rayleigh diffuser. While this approach can simulate the parallel incidence of sunlight, it is relatively tall, typically exceeding 40 cm, making it unsuitable for home lighting applications. Summary of the Invention

[0005] The main purpose of the present invention is to provide a lighting device to solve the technical problem that the sky light in the prior art cannot simulate the illumination characteristics of sunlight.

[0006] To achieve the above objectives, according to one aspect of the present invention, there is provided an illumination device, comprising: a Rayleigh scattering plate having a light incident surface and a light exiting surface arranged opposite to each other; a light-emitting assembly arranged opposite to the light incident surface, the light-emitting assembly comprising a light-emitting portion and a total reflection lens, the light-emitting portion being arranged obliquely relative to the Rayleigh scattering plate, the total reflection lens being arranged at the light-emitting portion, and being configured to reduce the exit angle of a light beam emitted by the light-emitting portion; and a light-shielding portion arranged between the Rayleigh scattering plate and the light-emitting assembly so as to shield the light-emitting assembly via the light-shielding portion.

[0007] Furthermore, the light-emitting assembly includes a plurality of light-emitting parts and a plurality of total reflection lenses, the plurality of light-emitting parts and the plurality of total reflection lenses are arranged in a one-to-one correspondence, and each total reflection lens is arranged at a corresponding light-emitting part.

[0008] Furthermore, the light emitting assembly further includes: a connecting plate, and a plurality of light emitting portions are arranged on the connecting plate at intervals along an extension direction of the connecting plate.

[0009] Furthermore, there are multiple light-emitting components, and the multiple light-emitting components are arranged at intervals in a preset direction to form a light-emitting array, and the shape of the light-emitting array is adapted to the shape of the Rayleigh scattering plate.

[0010] Furthermore, the included angle between the connecting plate and the Rayleigh scattering plate is γ, where 0°<γ<90°.

[0011] Furthermore, the light shielding portion is arranged parallel to the optical axis of the light emitted by the light emitting portion.

[0012] Furthermore, the shading portion includes a first shading plate, which is arranged perpendicular to the Rayleigh scattering plate and extends along the extension direction of the connecting plate.

[0013] Furthermore, the shading portion includes a first shading plate and a second shading plate, both of which are arranged perpendicular to the Rayleigh scattering plate, the first shading plate extends along the extension direction of the connecting plate, and the second shading plate extends along the extension direction perpendicular to the connecting plate, and the second shading plate is arranged between two adjacent light-emitting portions.

[0014] Furthermore, there are multiple first light shielding plates, and multiple second light shielding plates, and the multiple first light shielding plates and the multiple second light shielding plates are staggered to form a light shielding grid structure.

[0015] Furthermore, the vertical distance from the center point of the light-emitting surface of the light-emitting portion to the light incident surface of the Rayleigh scattering plate is H, and the distance between two adjacent light-emitting components is D, H / D ≥ 1.2; and / or, the vertical distance from the center point of the light-emitting surface of the light-emitting portion to the light incident surface of the Rayleigh scattering plate is H, and the distance between two adjacent total reflection lenses is W, H / W ≥ 1.5; and / or, the distance between the axis of the total reflection lens of the light-emitting component and the light-shielding portion of the light-emitting component is d1, and the distance between the total reflection lens of the light-emitting component and the light-shielding portion of another adjacent light-emitting component is d2, d1 ≥ d2.

[0016] Furthermore, the total reflection lens is a non-rotationally symmetric model, and the total reflection lens is used to form a square light spot.

[0017] Furthermore, the total reflection lens includes: a first transmission portion, the first transmission portion is a conical structure, the outer peripheral surface of the first transmission portion forms a reflection surface, the top surface of the first transmission portion forms a transmission surface, the bottom of the first transmission portion is provided with an opening groove, and the light-emitting surface of the light-emitting portion is arranged opposite to the opening of the opening groove; a second transmission portion, the second transmission portion is arranged on the first transmission portion, the second transmission portion is located in the opening groove, the second transmission portion has an arcuate surface, and the arcuate surface is arranged toward the opening of the opening groove.

[0018] Furthermore, the second transmission portion is spaced apart from the sidewall of the opening groove, so that a light-emitting gap is formed between the second transmission portion and the opening groove.

[0019] Furthermore, the total reflection lens has a first symmetry plane and a second symmetry plane. The total reflection lens is symmetrically arranged relative to the first symmetry plane. The total reflection lens is symmetrically arranged relative to the second symmetry plane. The first symmetry plane and the second symmetry plane are arranged perpendicularly.

[0020] Furthermore, the reflecting surface includes a first curved surface, a second curved surface, a third curved surface and a fourth curved surface connected in sequence; the first curved surface and the second curved surface are located on one side of the first symmetric plane, and the third curved surface and the fourth curved surface are located on the other side of the first symmetric plane; the first curved surface and the fourth curved surface are located on one side of the second symmetric plane, and the second curved surface and the third curved surface are located on the other side of the second symmetric plane; wherein, the first curved surface includes a first contour line, a second contour line and a third contour line, the first contour line is located at one end of the first curved surface, the third contour line is located at the other end of the first curved surface, the second contour line is located between the first contour line and the third contour line, the first contour line and the second contour line are connected in an arcuate transition, and the second contour line and the third contour line are connected in an arcuate transition to form a first curved surface, so as to adjust the shape of the light spot by changing the shapes of the first contour line, the second contour line and the third contour line.

[0021] Furthermore, the maximum exit angle of the exit light of the total reflection lens on the first predetermined plane is α1, 18°≤α1≤21°; and / or, the maximum exit angle of the exit light of the total reflection lens on the first predetermined plane is α2, 18°≤α2≤21°; and / or, the maximum exit angle of the exit light of the total reflection lens on the first predetermined plane is α3, 18°≤α3≤21°.

[0022] The technical solution of the present invention effectively simulates the parallel beam of sunlight by tilting the light-emitting portion and the Rayleigh scattering plate and reducing the angle of the light beam emitted by the light-emitting portion through a total reflection lens, thereby preventing the light from being emitted at a large angle. Therefore, the lighting device provided by the embodiments of the present invention can solve the technical problem that conventional skylights cannot simulate the illumination characteristics of sunlight. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 A schematic structural diagram of a lighting device provided in an embodiment of the present invention is shown;

[0025] Figure 2A schematic diagram showing the filtering of large-angle stray light from a total reflection lens by a light shield provided by an embodiment of the present invention is shown;

[0026] Figure 3 A schematic structural diagram of a lighting device according to another embodiment of the present invention is shown;

[0027] Figure 4 A schematic structural diagram of an illumination device provided with a first shading plate and a second shading plate according to an embodiment of the present invention is shown;

[0028] Figure 5 Shows various dimensions of a lighting device provided according to an embodiment of the present invention;

[0029] Figure 6 A schematic structural diagram of a first light shielding plate and a light emitting assembly provided in an embodiment of the present invention is shown;

[0030] Figure 7 A schematic structural diagram of a total reflection lens provided according to an embodiment of the present invention is shown;

[0031] Figure 8 1. The figure shows the projection of the total reflection lens provided in the embodiment of the present invention in the XY direction;

[0032] Figure 9 The actual simulation spot distribution result of the total reflection lens provided by the embodiment of the present invention is shown;

[0033] Figure 10 A half-sectional view of a total reflection lens provided according to an embodiment of the present invention is shown.

[0034] The above drawings include the following reference numerals:

[0035] 10. Rayleigh scattering plate; 20. Light-emitting component; 21. Light-emitting portion; 22. Total reflection lens; 221. First transmission portion; 2211. Reflection surface; 2212. Transmission surface; 22111. First contour line; 22112. Second contour line; 22113. Third contour line; 222. Second transmission portion; 2221. Arc-shaped surface; 23. Connecting plate; 30. Shading portion; 31. First shading plate; 32. Second shading plate; 40. Large-angle stray light; 50. Outgoing light beam. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] like Figures 1 to 10As shown (a spatial rectangular coordinate system is established in some figures, with mutually perpendicular X-axis, Y-axis, and Z-axis), an embodiment of the present invention provides a lighting device, which includes a Rayleigh scattering plate 10, a light-emitting assembly 20, and a light shielding portion 30. The Rayleigh scattering plate 10 has a light-incident surface and a light-emitting surface disposed opposite each other. The light-emitting assembly 20 is disposed opposite the light-incident surface and includes a light-emitting portion 21 and a total reflection lens 22. The light-emitting portion 21 is disposed at an angle relative to the Rayleigh scattering plate 10. The total reflection lens 22 is disposed at the light-emitting portion 21 and is configured to reduce the exit angle of the light beam emitted by the light-emitting portion 21. The light shielding portion 30 is disposed between the Rayleigh scattering plate 10 and the light-emitting assembly 20 so as to shield the light-emitting assembly 20.

[0038] The lighting device provided in this embodiment is used to tilt the light emitting portion 21 and the Rayleigh scattering plate, and to reduce the emission angle of the light beam emitted by the light emitting portion 21 by a total reflection mirror, as shown in FIG. Figure 2 As shown, the light shielding portion 30 eliminates high-angle stray light 40 from the light emitted by the light emitting portion 21. This prevents the emission of high-angle stray light 40, thereby simulating the inclined and parallel outgoing beam 50 of sunlight. Therefore, the lighting device provided by this embodiment solves the technical problem of conventional skylights being unable to simulate the illumination characteristics of sunlight. Furthermore, because the lighting device of this embodiment does not require a reflector or other structure, the height of the lighting device can be effectively reduced, thereby significantly reducing the size of the lighting device.

[0039] The lighting device provided in this embodiment has a simple structure, good versatility, and is minimally affected by the shape and size of the lamp. Because this embodiment eliminates the need for a complex, space-consuming reflector, the height of the lighting device can be significantly reduced. In practical applications, the height of the lighting device can be controlled to within 20 cm, or even within 10 cm. Therefore, the lighting device in this embodiment can not only simulate the sky, but also simulate the illumination characteristics of a parallel sunlight beam incident on a skylight or window.

[0040] Specifically, the light-emitting assembly 20 in this embodiment includes a plurality of light-emitting parts 21 and a plurality of total reflection lenses 22. The plurality of light-emitting parts 21 and the plurality of total reflection lenses 22 are arranged in a one-to-one correspondence, and each total reflection lens 22 is arranged at the corresponding light-emitting part 21. With such a structural arrangement, it is convenient to trim the light emitted by the corresponding light-emitting part 21 through each total reflection lens 22, and eliminate the large-angle outgoing light in the outgoing light of the light-emitting part 21 with the help of the shading part 30, thereby avoiding the emission of light at a large angle, so as to improve the effect of simulating sunlight. Specifically, the light-emitting part 21 in this embodiment can be an LED lamp, and the total reflection lens 22 is used to perform secondary light distribution on the LED light source alone.

[0041] Specifically, a single total reflection lens 22 can achieve a small-angle outgoing light beam and a roughly rectangular light spot. The outgoing light beams from multiple total reflection lenses 22 cooperate with each other to form an equivalent surface light source with a large area and a small beam angle. This equivalent surface light source can evenly illuminate the Rayleigh scattering plate 10.

[0042] In this embodiment, the light-emitting assembly 20 further includes a connecting plate 23, on which a plurality of light-emitting portions 21 are spaced apart along the extension direction of the connecting plate 23. Preferably, the optical axes of the light-emitting portions 21 are arranged parallel to one another. Specifically, the connecting plate 23 is in the shape of a strip, and the connecting plate 23 may be a PCB, or a PCB may be disposed on the connecting plate 23, and the plurality of LED lights are spaced apart along the extension direction of the PCB.

[0043] Specifically, in this embodiment, there may be multiple light-emitting assemblies 20, which are spaced apart in a predetermined direction to form a light-emitting array. The shape of the light-emitting array is compatible with the shape of the Rayleigh scattering plate 10. Preferably, the optical axes of the multiple light-emitting assemblies 20 are arranged parallel to each other. Specifically, the multiple light-emitting assemblies 20 can be spaced apart in a direction perpendicular to the extension of the connecting plate 23 to form the light-emitting array. The Rayleigh scattering plate 10 can be a square plate or a circular plate, etc., and the multiple light-emitting assemblies 20 can be arranged in a reasonable manner to ensure that the shape of the light-emitting array is compatible with the shape of the Rayleigh scattering plate.

[0044] Specifically, the angle between the connecting plate 23 and the Rayleigh scattering plate 10 is γ, where 0°<γ<90°. With this arrangement, by angling the connecting plate 23 and the Rayleigh scattering plate 10 and performing secondary light distribution through the total reflection lens 22, the light can be emitted at an angle relative to the Rayleigh scattering plate 10, rather than perpendicular to the Rayleigh scattering plate 10, thereby simulating the scene of sunlight obliquely shining into a room through a window or skylight. Specifically, considering factors such as component shading and light emission efficiency, γ is generally between 20° and 60°. Preferably, γ is between 40° and 50°, with γ being more preferably 45°, in order to better simulate the characteristics of the oblique beam of sunlight.

[0045] In this embodiment, the interval of the light emitted by the light emitting portion is a symmetrical structure, the symmetry axis of the interval of the light emitted by the light emitting portion is the optical axis, and the light shielding portion is arranged parallel to the optical axis of the light emitted by the light emitting portion.

[0046] In this embodiment, the light shielding portion 30 includes a first light shielding plate 31, which is arranged at an angle relative to the Rayleigh scattering plate 10 and extends along the extension direction of the connecting plate 23. This structure further absorbs high-angle light, preventing high-angle light in the light beam emitted by the total reflection lens 22 from striking the Rayleigh scattering plate 10. This effectively suppresses the angle of the emitted light beam, ultimately limiting the angle of the emitted light beam to a relatively small angle, thereby improving the collimation of the emitted light. Specifically, the first light shielding plate 31 in this embodiment can be a matte black light shielding plate to shield the PCB, LED lamp, and total reflection lens 22, thereby preventing users from directly viewing these internal components when looking up from below. This achieves a "see the light without seeing the lamp" effect to a certain extent, improving the aesthetics and preventing any impact on the light output. Preferably, in this embodiment, each row of light-emitting components 20 is located between two adjacent first shading plates 31, that is, the number of first shading plates 31 is greater than the number of rows of light-emitting components 20. Such a structural setting can facilitate the shading part 30 to absorb large-angle light emitted by all light-emitting components 20.

[0047] In another embodiment, the light shielding portion 30 includes a first light shielding plate 31 and a second light shielding plate 32. The second light shielding plate 32 is arranged perpendicular to the Rayleigh scattering plate 10. The first light shielding plate 31 extends along the extension direction of the connecting plate 23, and the second light shielding plate 32 extends perpendicular to the extension direction of the connecting plate 23. The second light shielding plate 32 is arranged between two adjacent light-emitting portions 21. With this structural arrangement, the first light shielding plate 31 can shield the entire light-emitting assembly 20 and effectively absorb the high-angle light emitted by the light-emitting assembly 20. The second light shielding plate 32 can effectively separate two adjacent light-emitting portions 21 and effectively absorb the high-angle light emitted by the two adjacent light-emitting portions 21. In other words, the first light shielding plate 31 and the second light shielding plate 32 can filter the outgoing light beam in both the X and Y directions.

[0048] Specifically, multiple first light shielding plates 31 and multiple second light shielding plates 32 are provided, and the multiple first light shielding plates 31 and the multiple second light shielding plates 32 are staggered to form a light shielding grid structure. This structure effectively blocks the PCB board, LED lights, and total reflection lens 22, and effectively reduces the wide-angle light emitted by the light-emitting assembly 20, thereby effectively trimming the light.

[0049] Specifically, the vertical distance from the center point of the light-emitting surface of the light-emitting portion 21 to the light incident surface of the Rayleigh scattering plate 10 is H, and the distance between two adjacent light-emitting components 20 is D. Generally, H / D ≥ 1.2, preferably, H / D ≥ 2.25; and / or, the vertical distance from the center point of the light-emitting surface of the light-emitting portion 21 to the light incident surface of the Rayleigh scattering plate 10 is H, and the distance between two adjacent total reflection lenses 22 is W. Generally, H / W ≥ 1.5, preferably, H / W ≥ 3; and / or, the distance between the axis of the total reflection lens 22 of the light-emitting component 20 and the light-shielding portion 30 of the light-emitting component 20 is d1, and the distance between the total reflection lens 22 of the light-emitting component 20 and the light-shielding portion 30 of another adjacent light-emitting component 20 is d2, and d1 ≥ d2, so as to effectively block and absorb large-angle light.

[0050] Preferably, in the above embodiment, H / D ≥ 2.25, H / W ≥ 3 and d1 ≥ d2, so that the outgoing light beams of adjacent total reflection lenses 22 can cross to a certain extent, so that the outgoing light beams of two adjacent total reflection lenses 22 can overlap to a certain extent in the light spots formed on the Rayleigh scattering plate 10, so that the light spots emitted by multiple total reflection lenses 22 form a whole, avoiding the occurrence of multiple independent light spots, and effectively improving the illumination effect.

[0051] Specifically, the total reflection lens 22 in the above embodiment can be a rotationally symmetric model or a non-rotationally symmetric model. For a rotationally symmetric model, the beam angles of the outgoing light beams in the entire circumferential direction are very similar; for a non-rotationally symmetric lens model, the beam angles of the outgoing light beams in the X and Y directions are different. Relatively speaking, the non-rotationally symmetric lens model is more flexible in angle control in practical applications. Therefore, the total reflection lens 22 is preferably a non-rotationally symmetric model, and the total reflection lens 22 is used to form a nearly rectangular light spot.

[0052] like Figure 10As shown, in this embodiment, the total reflection lens 22 includes a first transmission portion 221 and a second transmission portion 222. The first transmission portion 221 has a conical structure. The outer peripheral surface of the first transmission portion 221 (herein, the outer peripheral surface also refers to the side surface of the first transmission portion 221) forms a reflective surface 2211, and the top surface of the first transmission portion 221 forms a transmissive surface 2212, so that light that is totally reflected by the reflective surface 2211 is transmitted through the transmissive surface 2212. The bottom of the first transmission portion 221 is provided with an opening groove, and the light-emitting surface of the light-emitting portion 21 is disposed opposite the opening of the opening groove. The second transmission portion 222 is disposed on the first transmission portion 221 and is located within the opening groove. The second transmission portion 222 has a curved surface 2221, which is disposed toward the opening of the opening groove, so that light impinging on the curved surface 2221 is transmitted through the transmissive surface 2212. Specifically, the transmissive surface 2212 can be a curved surface or a flat surface, with the transmissive surface 2212 preferably being a flat surface. The top surface of the first transmission portion 221 refers to a side facing the user, and the bottom surface of the first transmission portion 221 refers to a side facing the installation base.

[0053] With this structure, a large amount of light from the light-emitting portion 21 enters the opening slot of the first transmissive portion 221. Some of the light entering the opening slot passes through the sidewalls of the opening slot and strikes the reflective surface 2211, while some passes through the opening slot and strikes the curved surface 2221. The light striking the reflective surface 2211 undergoes total reflection at the reflective surface 2211 before exiting through the transmissive surface. Both the first transmissive portion 221 and the second transmissive portion 222 are used to trim the light. The transmissive surfaces can reduce the beam angle of the outgoing light beam (beam angle and exit angle are synonymous here, both referring to the angle between the angle of the outgoing light and the axis of the light-emitting portion 21) to enhance the simulation effect.

[0054] Specifically, in this embodiment, the second transmissive portion 222 is spaced apart from the sidewalls of the opening slot, forming a light-emitting gap between the second transmissive portion 222 and the opening slot for light to escape. With this structural arrangement, some light entering the opening slot passes through the light-emitting gap, the curved surface 2221, and out of the transmissive surface 2212, whereby the light beam's exit angle is reduced by the transmissive surface.

[0055] In this embodiment, the total reflection lens 22 has a first symmetry plane and a second symmetry plane. The total reflection lens 22 is symmetrically arranged with respect to the first symmetry plane, and the total reflection lens 22 is symmetrically arranged with respect to the second symmetry plane. The first symmetry plane and the second symmetry plane are arranged perpendicularly. Specifically, a spatial coordinate system can be established, which has three coordinate axes perpendicular to each other: an X-axis, a Y-axis, and a Z-axis. The total reflection lens 22 is symmetrical with respect to the YZ coordinate plane in the X direction, and is symmetrical with respect to the XZ coordinate plane in the Y direction.

[0056] Furthermore, the reflective surface 2211 includes a first curved surface, a second curved surface, a third curved surface, and a fourth curved surface connected in sequence; the first curved surface and the second curved surface are located on one side of the first symmetry plane, and the third curved surface and the fourth curved surface are located on the other side of the first symmetry plane; the first curved surface and the fourth curved surface are located on one side of the second symmetry plane, and the second curved surface and the third curved surface are located on the other side of the second symmetry plane. In this way, once the formation method of one curved surface is determined, the formation methods of the second, third, and fourth curved surfaces are also determined.

[0057] The first curved surface includes a first contour line 22111, a second contour line 22112, and a third contour line 22113. The first contour line 22111, the second contour line 22112, and the third contour line 22113 can all be curves. The first contour line 22111 is located at one end of the first curved surface, the third contour line 22113 is located at the other end of the first curved surface, and the second contour line 22112 is located between the first contour line 22111 and the third contour line 22113. The first contour line 22111 and the second contour line 22112 are connected in an arcuate transition, and the second contour line 22112 and the third contour line 22113 are connected in an arcuate transition to form the first curved surface. The shape of the light spot can be adjusted by changing the shapes of the first contour line 22111, the second contour line 22112, and the third contour line 22113. The first contour line 22111, the second contour line 22112, and the third contour line 22113 are all contour lines of the outer peripheral surface. The first contour line 22111 is located on the XZ coordinate plane (i.e., the first symmetry plane). The shape and size of the first contour line 22111 are determined by the spatial coordinate values of each point on the first contour line 22111. The emission angle of the light beam in the X direction can be adjusted by adjusting the spatial coordinates of each coordinate point on the first contour line 22111. The third contour line 22113 is located on the YZ coordinate plane (i.e., the second symmetry plane). The shape and size of the third contour line 22113 are determined by the spatial coordinate values of each point on the third contour line 22113. The emission angle of the light beam in the Y direction can be adjusted by adjusting the spatial coordinates of each coordinate point on the third contour line 22113.

[0058] In this embodiment, there is at least one second contour line 22112 of the total reflection lens 22 between the first contour line 22111 and the third contour line 22113. The plane on which the second contour line 22112 lies is between the XZ coordinate plane and the YZ coordinate plane. The shape and size of the second contour line 22112 are determined by the spatial coordinate values of each point on the second contour line 22112. By adjusting the spatial coordinates of each coordinate point on the second contour line 22112, the corresponding in-plane outgoing light beam exit angle is adjusted. By adjusting the first contour line 22111, the second contour line 22112, and the third contour line 22113, as well as the corresponding light beam exit angle, the light spot of the outgoing light passing through the total reflection lens 22 on the working surface is close to a relatively regular rectangular distribution. The regular rectangular distribution of light spots is conducive to better uniformity of the light spots formed on the Rayleigh scattering plate 10 by the outgoing light beams of the total reflection lens 22 array. Figure 9 This is the actual simulation result of a single total reflection lens 22, and the light spot is approximately rectangular.

[0059] Specifically, the maximum exit angle of the exit light of the total reflection lens 22 on the first predetermined plane is α1, 18°≤α1≤21°; and / or, the maximum exit angle of the exit light of the total reflection lens 22 on the first predetermined plane is α2, 18°≤α2≤21°; and / or, the maximum exit angle of the exit light of the total reflection lens 22 on the first predetermined plane is α3, 18°≤α3≤21°.

[0060] Preferably, in this embodiment, 18°≤α1≤21°, 18°≤α2≤21°, and 18°≤α3≤21° are favorable for improving the irradiation characteristics of simulated sunlight.

[0061] In this embodiment, the material of the total reflection lens 22 includes but is not limited to transparent plastic materials such as PMMA, PC, silicone, and ABS.

[0062] In the above embodiment, the arrangement of the light-emitting array matches the shape of the Rayleigh scatter plate 10. For example, when the Rayleigh scatter plate 10 is elongated, the light-emitting array can be arranged in a linear or rectangular arrangement. When the Rayleigh scatter plate 10 is square, the light-emitting array can be arranged in a square. When the Rayleigh scatter plate 10 is circular, the light-emitting array can be a circular dot matrix with the total reflection lens 22 units as nodes.

[0063] Specifically, the Rayleigh scatter plate 10 in this embodiment has a rectangular structure, and light travels along the direction between the XY coordinate plane and the YZ coordinate plane. The array of total reflection lenses 22 is divided into several groups in the X direction, and the total reflection lenses 22 in the same group are arranged linearly in the Y direction. Furthermore, the Rayleigh scatter plate 10 in this embodiment can be made of plastic or glass, doped with nano-scattering particles or a Rayleigh scattering coating.

[0064] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: the size of the lamp is reduced, the structure is simple, the versatility is good, and it can simulate the sky while simulating the illumination characteristics of parallel incident sunlight beams.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0066] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0067] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0068] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0069] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0070] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A lighting device, characterized in that: include: A Rayleigh scattering plate (10), the Rayleigh scattering plate (10) having a light incident surface and a light emitting surface that are arranged opposite to each other; A light-emitting component (20), the light-emitting component (20) being arranged opposite to the light incident surface, the light-emitting component (20) comprising a light-emitting portion (21) and a total reflection lens (22), the light-emitting portion (21) being arranged obliquely relative to the Rayleigh scattering plate (10), the total reflection lens (22) being arranged at the light-emitting portion (21), and the total reflection lens (22) being used to reduce an emission angle of a light beam emitted by the light-emitting portion (21); a light shielding portion (30) disposed between the Rayleigh scattering plate (10) and the light emitting assembly (20) to shield the light emitting assembly (20) through the light shielding portion (30); The light-emitting assembly (20) comprises a plurality of light-emitting portions (21) and a connecting plate (23), wherein the plurality of light-emitting portions (21) are arranged on the connecting plate (23) at intervals along an extension direction of the connecting plate (23); The shading portion (30) comprises a first shading plate (31), the first shading plate (31) and the Rayleigh scattering plate (10) are arranged at an angle, and the first shading plate (31) extends along the extension direction of the connecting plate (23).

2. The lighting device according to claim 1, characterized in that The light-emitting assembly (20) further comprises a plurality of total reflection lenses (22), the plurality of light-emitting portions (21) and the plurality of total reflection lenses (22) are arranged in a one-to-one correspondence, and each total reflection lens (22) is arranged at a corresponding light-emitting portion (21).

3. The lighting device according to claim 2, characterized in that There are a plurality of light-emitting components (20), and the plurality of light-emitting components (20) are arranged at intervals in a preset direction to form a light-emitting array, and the shape of the light-emitting array is adapted to the shape of the Rayleigh scattering plate (10).

4. The lighting device according to claim 2, characterized in that The included angle between the connecting plate (23) and the Rayleigh scattering plate (10) is γ, where 0°<γ<90°.

5. The lighting device according to claim 1, wherein The light shielding portion (30) is arranged parallel to the optical axis of the light emitted by the light emitting portion (21).

6. The lighting device according to claim 2, characterized in that The shading portion (30) further comprises a second shading plate (32), the second shading plate (32) being arranged obliquely with respect to the Rayleigh scattering plate (10), the first shading plate (31) extending along the extension direction of the connecting plate (23), the second shading plate (32) extending perpendicular to the extension direction of the connecting plate (23), and the second shading plate (32) being arranged between two adjacent light-emitting portions (21).

7. The lighting device according to claim 6, characterized in that There are a plurality of the first light shielding plates (31), a plurality of the second light shielding plates (32), and the plurality of the first light shielding plates (31) and the plurality of the second light shielding plates (32) are staggered to form a light shielding grid structure.

8. The lighting device according to claim 2, characterized in that The vertical distance from the center point of the light-emitting surface of the light-emitting portion (21) to the light-entering surface of the Rayleigh scattering plate (10) is H, the distance between two adjacent light-emitting components (20) is D, and H / D ≥ 1.2; and / or, The vertical distance from the center point of the light-emitting surface of the light-emitting portion (21) to the light-entering surface of the Rayleigh scattering plate (10) is H, the distance between two adjacent total reflection lenses (22) is W, and H / W ≥ 1.5; and / or, The distance between the axis of the total reflection lens (22) of the light-emitting component (20) and the light-shielding portion (30) of the light-emitting component (20) is d1, and the distance between the total reflection lens (22) of the light-emitting component (20) and the light-shielding portion (30) of another adjacent light-emitting component (20) is d2, and d1≥d2.

9. The lighting device according to claim 1, wherein: The total reflection lens (22) is a non-rotationally symmetrical model, and the total reflection lens (22) is used to form a square light spot.

10. The lighting device according to any one of claims 1 to 9, characterized in that: The total reflection lens (22) comprises: a first transmission portion (221), the first transmission portion (221) being a conical structure, the outer peripheral surface of the first transmission portion (221) forming a reflective surface (2211), the top surface of the first transmission portion (221) forming a transmission surface, an open groove being provided at the bottom of the first transmission portion (221), and the light-emitting surface of the light-emitting portion (21) being arranged opposite to the opening of the open groove; A second transmission portion (222), the second transmission portion (222) is arranged on the first transmission portion (221), the second transmission portion (222) is located in the opening slot, and the second transmission portion (222) has an arc-shaped surface, and the arc-shaped surface is arranged toward the opening of the opening slot.

11. The lighting device according to claim 10, characterized in that The second transmission portion (222) is spaced apart from the side wall of the opening slot, so that a light-emitting gap is formed between the second transmission portion (222) and the opening slot.

12. The lighting device according to claim 10, characterized in that The total reflection lens (22) has a first symmetry plane and a second symmetry plane, the total reflection lens (22) is symmetrically arranged relative to the first symmetry plane, the total reflection lens (22) is symmetrically arranged relative to the second symmetry plane, and the first symmetry plane and the second symmetry plane are arranged perpendicularly.

13. The lighting device according to claim 12, characterized in that The reflecting surface (2211) comprises a first curved surface, a second curved surface, a third curved surface, and a fourth curved surface connected in sequence; the first curved surface and the second curved surface are located on one side of the first symmetric surface, and the third curved surface and the fourth curved surface are located on the other side of the first symmetric surface; the first curved surface and the fourth curved surface are located on one side of the second symmetric surface, and the second curved surface and the third curved surface are located on the other side of the second symmetric surface; Wherein, the first curved surface includes a first contour line (22111), a second contour line (22112) and a third contour line (22113), the first contour line (22111) is located at one end of the first curved surface, the third contour line (22113) is located at the other end of the first curved surface, the second contour line (22112) is located between the first contour line (22111) and the third contour line (22113), the first contour line (22111) and the second contour line (22112) are connected in an arcuate transition, and the second contour line (22112) and the third contour line (22113) are connected in an arcuate transition to form the first curved surface, so as to adjust the shape of the light spot by changing the shapes of the first contour line (22111), the second contour line (22112) and the third contour line (22113).

14. The lighting device according to claim 1, characterized in that The maximum exit angle of the exit light of the total reflection lens (22) on the first predetermined plane is α1, 18°≤α1≤21°; and / or, The maximum exit angle of the exit light of the total reflection lens (22) on the first predetermined plane is α2, 18°≤α2≤21°; and / or, The maximum exit angle of the exit light of the total reflection lens (22) on the first predetermined plane is α3, 18°≤α3≤21°.

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