Illuminating device, illuminating system and illuminating method

Abstract

The lighting device comprises a light source, a first light distribution part and a second light distribution part, the first light distribution part and the second light distribution part are sequentially arranged along the optical axis of the light source, the first light distribution part is arranged in the light emitting direction of the light source, the second light distribution part is connected to the first light distribution part, the first light distribution part comprises a first light ray processing face, and the second light distribution part comprises a second light ray processing face. Emergent light rays emitted by the light source to the first light distribution part comprise a plurality of first-level light rays reaching the first light ray processing surface, and the first light ray processing surface is configured to receive the first-level light rays and process the first-level light rays into second-level light rays which deflect at a first angle relative to an optical axis; the second light distribution part comprises a second light ray processing surface, and the second light ray processing surface is arranged in the circumferential direction of the light source and the first light ray processing surface and allows the second-level light rays to reach and be processed into third-level light rays which deflect at a second angle relative to the optical axis; and the area of the second light processing surface is larger than that of the first light processing surface. According to the invention, the light of the light source is uniformly distributed and emitted after being re-distributed, so that the problem of glare is relieved.

Description

Technical Field

[0001] The present application relates to the field of lighting technology, and in particular to a lighting device, a lighting system and a lighting method. Background Art

[0002] With the advancement of science and technology, people's quality of life is getting higher and higher. At the same time, with the increasing maturity of LED technology and the lighting market, the lighting fixture market has gradually been segmented into professional lighting fields such as smart lighting, circulation lighting, commercial lighting, office lighting, and home lighting.

[0003] For LED lamps currently on the market, the light emitted by the LED chip has a certain intensity. If it is emitted directly outside the lamp, or if the local light intensity is too high due to poor lighting uniformity, people looking directly at the lamp, such as standing under the lamp and looking up at the lamp, will cause glare, thereby affecting the comfort of the human eye.

[0004] Therefore, those skilled in the art are committed to developing a lighting system and a lighting method to improve the visual experience of users. Summary of the Invention

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by this application is that the existing LED lamps have a high intensity of emitted light that affects the comfort of human eyes.

[0006] To achieve the above-mentioned objectives, the present application provides a lighting device, which includes a light source and a first light distribution part and a second light distribution part arranged in sequence along the optical axis of the light source, the first light distribution part is arranged in the light emitting direction of the light source, and the second light distribution part is connected to the first light distribution part, wherein the first light distribution part includes a first light processing surface, and the outgoing light emitted by the light source to the first light distribution part includes a plurality of primary light rays reaching the first light processing surface, and the first light processing surface is configured to receive the primary light and process it into secondary light rays deflected at a first angle relative to the optical axis; the second light distribution part includes a second light processing surface, and the second light processing surface is arranged in the circumference of the light source and the first light processing surface, for the secondary light rays to arrive and be processed into tertiary light rays deflected at a second angle relative to the optical axis; and the area of the second light processing surface is larger than that of the first light processing surface.

[0007] In one embodiment, the first light distribution portion and the second light distribution portion are spaced apart from each other, or are connected to each other, or are integrally formed.

[0008] In one embodiment, the second angle is smaller than the first angle.

[0009] In one embodiment, the first light processing surface is configured to allow the primary light to be totally reflected inside the first light distribution portion or reflected on an outer surface of the first light distribution portion.

[0010] In one embodiment, the second light processing surface is configured to allow the secondary light to be totally reflected inside the second light distribution portion or reflected on an outer surface of the second light distribution portion.

[0011] In one embodiment, the second light processing surface includes a plurality of adjacently connected sub-processing surfaces, and the angle formed between any adjacent sub-processing surfaces is an obtuse angle.

[0012] In one embodiment, the first light processing surface is an inner interface or an outer surface of the first light distribution portion, and / or the second light processing surface is an inner interface or an outer surface of the second light distribution portion.

[0013] In one embodiment, the first light processing surface and / or the second light processing surface is a rotation structure centered on the optical axis or an axisymmetric structure with the optical axis as the axis of symmetry.

[0014] In one embodiment, the device further includes a third light processing surface arranged in the light emitting direction of the tertiary light. The third light processing surface is arranged on or connected to the second light distribution part and is configured to diffuse or converge the tertiary light.

[0015] In one embodiment, the third light processing surface is a flat light-transmitting surface or a plano-convex light-transmitting surface.

[0016] In one embodiment, it further includes a light adjustment layer arranged in the optical axis direction, the light adjustment layer is arranged on the outer end surface of the first light distribution part, or on the outer end surface of the second light distribution part, and is configured to block or weaken the non-reflected outgoing light from the light source.

[0017] In a second aspect, the present application also provides a lighting system, comprising a ceiling and the above-mentioned lighting device, wherein the lighting device is connected to the ceiling and further comprises an illumination target arranged along the optical axis, and the three-level light emitted by the lighting device is distributed on the illumination target.

[0018] In a third aspect, the present application further provides a lighting method, which uses the above-mentioned lighting system and includes the following steps:

[0019] S101, performing a primary light distribution on the primary light emitted by the light source, so that the primary light is deflected at a first angle relative to the optical axis to form a secondary light;

[0020] S102, performing secondary light distribution on the second light, so that the secondary light is deflected at a second angle relative to the optical axis to form a tertiary light, wherein the second angle is smaller than the first angle, and the intensities of the primary light, the secondary light, and the tertiary light decrease in sequence; and

[0021] S103, projecting the tertiary light onto an illumination target arranged along the optical axis direction.

[0022] In this application, after the light emitted by the light source passes through the cooperation of the first light distribution part and the second light distribution part, the light is redistributed and emitted evenly, thereby evenly distributing the light and light intensity of a single light source on the light-emitting surface, reducing the problem of glare.

[0023] It should be understood that the teachings of this application do not necessarily achieve all of the beneficial effects described above, but that specific technical solutions can achieve specific technical effects, and other embodiments of this application can also achieve beneficial effects not mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an illustrative and non-limiting manner, in which:

[0025] Figure 1 It is a structural schematic diagram of an embodiment of the lighting device of the present application.

[0026] Figure 2 yes Figure 1 Schematic diagram of the optical path principle in the implementation scheme.

[0027] Figure 3 It is a schematic diagram of the structure and light path of another embodiment of the lighting device of the present application.

[0028] Figure 4 It is a schematic diagram of the structure and light path of another embodiment of the lighting device of the present application.

[0029] Figure 5 It is a schematic diagram of the structure and light path of another embodiment of the lighting device of the present application.

[0030] Figure 6 It is a schematic diagram of the structure and light path of another embodiment of the lighting device of the present application.

[0031] Figure 7 It is a schematic diagram of the external structure of an embodiment of the second light distribution part of the lighting device of the present application.

[0032] Figure 8 It is a schematic cross-sectional structure diagram of another embodiment of the lighting device of the present application.

[0033] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0034] Among them, 100 is the first light distribution part, 101 is the first light processing surface, 110 is the first internal total reflection lens, 111 is the first light incident surface, 112 is the first light emitting surface, 120 is the first reflective cup, 200 is the second light distribution part, 201 is the second light processing surface, 202 is the sub-processing surface, 203 is the third light processing surface, 210 is the second internal total reflection lens, 220 is the second reflective cup, 221 is the second light incident surface, 300 is the light source, 400 is the optical axis, and 500 is the light adjustment layer. DETAILED DESCRIPTION

[0035] In order to make the purpose, features, and advantages of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0036] In the description of this specification, reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless otherwise inconsistent.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0038] like Figure 1Shown is a lighting device of the present application. The lighting device of the present application includes a light source 300, a first light distribution portion 100, and a second light distribution portion 200, which are sequentially arranged along an optical axis 400. The first light distribution portion 100 is arranged in the light emitting direction of the light source 300, and the second light distribution portion 200 is connected to the first light distribution portion 100. The light emitted by the light source 300 to the first light distribution portion 100 includes a plurality of primary light rays that arrive at a first light processing surface 101. The first light distribution portion 100 includes a first light processing surface 101, which is arranged in the light emitting direction of the light source 300 and is configured to receive the primary light rays and process them into secondary light rays deflected at a first angle relative to the optical axis 400. The second light distribution portion 200 includes a second light processing surface 201, which is arranged circumferentially between the light source 300 and the first light processing surface 101 and receives the secondary light rays and processes them into tertiary light rays deflected at a second angle relative to the optical axis 400. The area of the second light processing surface 201 is larger than that of the first light processing surface 101.

[0039] The optical axis 400 referred to herein is the central axis of light propagation. For example, for an LED chip mounted on a substrate, the optical axis 400 is the direction passing through the center of the LED chip and perpendicular to the substrate. For an LED light source 300, its emitted light follows a Lambertian distribution. To meet operational requirements, the light can be distributed to alter the resulting beam angle. However, poor illumination uniformity or excessively high localized light intensity can still cause glare. Therefore, while the present application distributes the outgoing light through the first light distribution part 100 and the second light distribution part 200, a first light processing surface 101 and a second light processing surface 201 are set therein, and the area of the second light processing surface 201 is configured to be larger than the first light processing surface 101. In this way, the second light processing surface 201 can collect more light from the first light processing surface 101, and since the area for receiving light is increased, more light from different angles can be obtained. Therefore, the distribution of the outgoing light after distribution in space is more uniform. As a result, the light intensity in a small range of the original LED light source can be dispersed to a larger outgoing surface. Compared with the original light source, the light intensity is weakened after redistribution, thereby improving the comfort of the human eye.

[0040] In one embodiment of the present application, the first light distribution portion 100 and the second light distribution portion 200 are arranged at intervals. For the lamp, the mounting structures of the first light distribution portion 100 and the second light distribution portion 200 are respectively arranged in the shell of the lamp. During installation or use, the position of the first light distribution portion 100 relative to the second light distribution portion 200 can be adjusted according to the light distribution requirements to adjust the light path so as to accurately configure the distribution of the emitted light.

[0041] In one embodiment of the present application, the first light distribution unit 100 and the second light distribution unit 200 are configured to be matingly connected. The first light distribution unit 100 and the second light distribution unit 200 can be connected via a connector, or they can be directly formed as a single piece. In applications where light distribution requirements remain constant, this mating connection provides a stable relative mounting position, simplifying installation steps and facilitating use.

[0042] In one embodiment of the present application, the first light distribution unit 100 may be a lens. Light emitted from the light source 300 passes through the lens. Inside the lens, the first light reaches the first light processing surface 101. The first light processing surface 101 is configured to provide total reflection of the primary light. The first light distribution unit 100 may optionally be a first internal total reflection lens 110. The first light processing surface 101 is correspondingly an internal total reflection surface configured within the first internal total reflection lens 110. After total reflection from the first light processing surface 101, the primary light forms a secondary light that is deflected at a first angle relative to the optical axis 400. The secondary light is emitted toward the outside, away from the optical axis 400, and then reaches the second light distribution unit 200.

[0043] The internal total reflection lens of the present application can design the shape of its internal total reflection surface based on the refractive index, total reflection critical angle and surface processing accuracy of the optical lens material, so that the light meets the total reflection conditions and as much light as possible can be internally reflected therein. Its contour shape can be obtained through optical simulation or multiple adjustments and optimizations based on actual usage conditions.

[0044] In another embodiment of the present application, the first light distribution portion 100 can be a first reflective cup 120, and correspondingly, the first light processing surface 101 is the outer surface of the first reflective cup 120 that is arranged opposite to the light source 300. The first light is reflected from the light source 300 along the exit direction to the first light processing surface 101, forming a secondary light that is deflected at a first angle to the optical axis 400, and then emitted toward the outside away from the optical axis 400 and reaches the second light distribution portion 200.

[0045] In one embodiment of the present application, the second light distribution unit 200 may be a lens. The secondary light rays, after being distributed by the first light distribution unit 100 and deflected, are then totally reflected within the second light distribution unit 200. This total reflection occurs on the second light processing surface 201 of the second light distribution unit 200. For a lens, the second light distribution unit 200 may optionally be a second internal total reflection lens 210, with the second light processing surface 201 corresponding to the total reflection surface configured within the second internal total reflection lens 210. Preferably, the second light processing surface 201 is disposed on the periphery of the second internal total reflection lens 210, and, with reference to the optical axis 400, the second light processing surface 201 is circumferentially arranged outside the first light processing surface 101 to collect more light rays from the first light processing surface 101. The larger area of the second light processing surface 201 enables a more uniform distribution of light rays upon emission, which is more conducive to the requirements for light uniformity and intensity in practical applications.

[0046] In another embodiment of the present application, the second light distribution portion 200 can be a second reflective cup 220, which is arranged around the outer periphery of the first light processing surface 101. Correspondingly, the second light processing surface 201 is set as the inner surface of the second reflective cup 220 corresponding to the first light processing surface 101. The secondary light is reflected on the second light processing surface 201 and deflected at a second angle to become tertiary light.

[0047] The first light processing surface 101 or the second light processing surface 201 of the present application, or both surfaces, can be a rotating structure centered on the optical axis 400, or an axisymmetric structure with the optical axis 400 as the axis of symmetry. Accordingly, the lighting device as a whole is a rotational structure rotated along the optical axis 400; or a symmetrical structure in the shape of a bar or square with the optical axis 400 as the axis of symmetry. In the various figures of the present application, the structure of the lighting device is primarily illustrated using longitudinal cross-sectional schematic diagrams or front views passing through the optical axis 400.

[0048] In an embodiment of a lighting device of the present application, the first light distribution part 100 is a first total internal reflection lens 110, and the second light distribution part 200 is a second total internal reflection lens 210. The first total internal reflection lens 110 includes a first light incident surface 111 corresponding to the light emitting direction of the light source 300. After the light emitted from the light source 300 enters the first light incident surface 111, a plurality of primary light rays included in the first total internal reflection lens 110 are deflected after being totally reflected on the first light processing surface 101. The first light incident surface 111 can be a flat transparent surface or a converging convex surface. Therefore, as needed, the light from the light source 300 can be concentrated as much as possible on the first light processing surface 101 to improve the lighting efficiency. Figure 2The figure shows the longitudinal cross-sectional structure of an illumination device of the present application, and a schematic diagram of the optical path thereof is shown in the figure. A primary light ray L11 in the first internal total reflection lens 110 reaches the first light processing surface 101. After total reflection on the first light processing surface 101, the angle formed relative to the optical axis 400 is A11, and then it is emitted from the first light emitting surface 112 as a secondary light ray L12. In this embodiment, the first light processing surface 101 is a curved surface extending outwardly from the optical axis 400, and the center of curvature of the curved surface is on the side close to the light source 300. In this way, the primary light is deflected toward the outside at a larger deflection angle after total reflection on the optical surface. A first light emitting surface 112 is correspondingly provided on the outside of the first internal total reflection lens 110 along the emitting direction of the primary light. The two ends of the first light emitting surface 112 are respectively connected to the first light incident surface 111 and the first light processing surface 101. The first light emitting surface 112 is configured to receive all light after reflection and deflection by the first light processing surface 101. The secondary light L12 is refracted on the first light emitting surface 112 and emitted to the second internal total reflection lens 210. The second total internal reflection lens 210 includes a second light incident surface 221 corresponding to the first light exit surface 112 and a second light exit surface corresponding to the irradiation target. The secondary light enters the second total internal reflection lens 210 from the second light incident surface 221. The second light processing surface 201 is configured to receive the light entering the second total internal reflection lens 210 and perform total reflection to form the tertiary light L13. Figure 2 In the figure, the secondary light L12 is totally reflected by the second internal total reflection lens 210 and then emitted as the tertiary light L13 which forms an angle A12 with the optical axis 400, wherein the angle A12 is smaller than the angle A11, so that the light totally reflected by the second light processing surface 201 converges toward the second light emitting surface.

[0049] In the lighting device of the present application, the first light distribution portion 100 is fixedly mounted relative to the second light distribution portion 200, thereby preventing relative movement of the first light distribution portion 100 relative to the second light distribution portion 200 and maintaining a stable light path. In one embodiment, the first light distribution portion 100 and the second light distribution portion 200 are the aforementioned internal total reflection lenses, and the second light incident surface 221 of the second light distribution portion 200 is disposed around the first light distribution portion 100 to form an installation space for accommodating the first light distribution portion 100. In another embodiment, the first light distribution portion 100 and the second light distribution portion 200 are the aforementioned internal total reflection lenses and are spaced apart. When used in a lamp, the first light distribution portion 100 and the second light distribution portion 200 are fixed relative to each other after being installed through the lamp housing.

[0050] like Figure 3The figure shows an embodiment of a lighting device of the present application. The lighting device is an integrated structure, wherein the first light distribution portion 100 and the second light distribution portion 200 are different parts of the same lens, wherein the first light distribution portion 100 is the portion close to the light source 300, and the second light distribution portion 200 is the portion farthest from the light source 300. The first light processing surface 101 is an internal total reflection surface provided corresponding to the light source 300, and the second light processing surface 201 is an internal total reflection surface provided around the periphery of the lens. The light path in this integrated lens follows the same trend as the light path in the aforementioned split structure. Inside the lens, the first light reaches the first light processing surface 101, is totally reflected, and then deflected, emerging as a secondary light to reach the second light distribution portion 200, where it is again totally reflected by the second light processing surface 201 to become a tertiary light.

[0051] In another embodiment of the present application, the first light distribution portion 100 can be a first reflective cup 120, and correspondingly, the first light processing surface 101 is the outer surface of the first reflective cup 120 that is arranged opposite to the light source 300. The first light is reflected from the light source 300 along the exit direction to the first light processing surface 101, forming a secondary light that is deflected at a first angle to the optical axis 400, and then emitted toward the outside away from the optical axis 400 and reaches the second light distribution portion 200.

[0052] like Figures 4 and 5 The figure shows an embodiment of the lighting device of the present application. The first light distribution part 100 is a first reflective cup 120, the second light distribution part 200 is a second reflective cup 220, and the light source 300 can be arranged inside or outside the first reflective cup 120, so that the first reflective cup 120 has different settings accordingly.

[0053] When the light source 300 is disposed inside the first reflective cup 120, as shown in FIG. Figure 4 As shown, the first reflector 120 surrounds the light source 300. The first light processing surface 101 is the inner wall of the first reflector 120. The wall of the first reflector 120 is tilted outward relative to the optical axis 400 along the light emission direction. The light emitted by the light source 300 can be reflected by its surface. In this embodiment, the two reflectors are provided with openings along the optical axis 400. Therefore, a portion of the light emitted by the light source 300 is directly emitted along the optical axis 400.

[0054] like Figure 5 The figure shows a preferred embodiment of a reflective cup structure. The light source 300 is disposed outside the first reflective cup 120. The first light processing surface 101 is the outer wall of the first reflective cup 120. After the primary light reaches the outer wall of the first reflective cup 120, it is reflected by the outer wall of the first reflective cup 120. The side wall of the first reflective cup 120 is tilted outward relative to the optical axis 400 in the light emitting direction, so that the first reflective cup 120 has a conical structure with the top facing the light source 300. Figure 5In the light path shown in FIG, a primary light ray L21 emitted from the light source 300 is reflected on the first reflector cup 120 and then emitted as a secondary light ray L22. The secondary light ray L22 forms an angle A21 with the optical axis 400. The emission direction of the secondary light ray L22 further diverges outward relative to the primary light ray L21 and reaches the second reflector cup 220. The second reflector cup 220 is circumferentially arranged around the first reflector cup 120. The second light processing surface 201 is the inner wall of the second reflector cup 220. After arriving at the second reflector cup 220, the secondary light ray L22 is reflected by the inner wall of the second reflector cup 220. The side wall of the second reflector cup 220 is tilted outward relative to the optical axis 400 in the light emission direction, causing the deflection direction of the reflected tertiary light ray L23 to form an angle A22 with the optical axis 400. The angle A22 is smaller than the angle A21, causing the reflected light to converge toward the light outlet of the second reflector cup 220. The wall surface of the reflective cup used for reflection can be set to a flat surface or a curved surface. Figure 5 In the embodiment, the outer wall of the first reflective cup 120 is a curved surface with the center of curvature located on the side near the light source 300, that is, it is a concave curved surface relative to the light source 300, and the outer wall of the second reflective cup 220 is a curved surface with the center of curvature located on the side away from the light source 300, that is, it is a convex curved surface relative to the light source 300.

[0055] like Figure 6 FIG. 1 shows another embodiment of a lighting device of the present application, wherein the first light distribution portion 100 is a first internal total reflection lens 110, and the second light distribution portion 200 is a second reflective cup 220. The first internal total reflection lens 110 includes a first light incident surface 111 corresponding to the light emission direction of the light source 300, and the first light processing surface 101 is an internal total reflection surface of the first internal total reflection lens 110. After the light emitted from the light source 300 enters the first light incident surface 111, as shown in FIG. Figure 6In the schematic optical path shown, a primary light ray L31 within the first total internal reflection lens 110 forms an angle A31 with respect to the optical axis 400 after being totally reflected by the first light processing surface 101. The primary light ray then exits the first light emitting surface 112 as a secondary light ray L32. In this embodiment, the first light processing surface 101 is a curved surface inclined outward from the optical axis 400, causing the primary light ray L31 to be deflected outward at a larger deflection angle after being totally reflected by the optical surface. The first light emitting surface 112 of the first total internal reflection lens 110 is correspondingly disposed around the first light processing surface 101 along the direction of the primary light's exit. The second reflector cup 220 is disposed circumferentially around the first internal total reflection lens 110. The second light processing surface 201 is the inner wall of the second reflector cup 220. The secondary light L32 is reflected by the inner wall of the second reflector cup 220. The sidewall of the second reflector cup 220 is tilted outward relative to the optical axis 400 in the light emission direction. The reflected tertiary light L33 is deflected to form an angle A32 with the optical axis 400. The angle A32 is smaller than the angle A31, thereby causing the tertiary light rays to converge and be emitted toward the light outlet of the second reflector cup 220.

[0056] In the second light distribution unit 200, the second light processing surface 201 can be a free-form surface or a composite curved surface. Figure 7 Another embodiment of the present application is shown, showing the outer contour of the lighting device. The first light distribution part 100 and the second light distribution part 200 are both lens structures, and thus the texture of the second light processing surface 201 is shown. The second light processing surface 201 includes a plurality of adjacently connected sub-processing surfaces 202. The angle formed between any adjacent sub-processing surfaces 202 is an obtuse angle. The adjacent sub-processing surfaces 202 are spliced into scale surfaces in sequence, which can achieve precise control of the direction of the light after total reflection, reduce the scattering of light, make the light better converge, and achieve more uniform light distribution.

[0057] In another embodiment of the present application, the second light distribution part 200 also includes a third light processing surface 203 arranged in the light emitting direction of the tertiary light, which is configured to be able to diffuse or converge the tertiary light. For a lamp, in a specific implementation, the third light processing surface 203 can be the light emitting surface of the second internal total reflection lens 210 corresponding to the irradiation target; when implemented as a reflective cup, it can also be a converging lens or filter installed on the light outlet of the second reflective cup. The third light processing surface 203 can be a flat translucent surface, and can be further selected as a filter, a scattering plate, etc., to adjust the light intensity or homogenize the tertiary light, or the third light processing surface 203 can be a flat convex translucent surface, which is used to converge the tertiary light and then emit it, so as to achieve focused lighting without causing glare. Figure 7 In the embodiment shown, the third light processing surface 203 is a light emitting surface with a convex curved profile; Figure 8In the illustrated embodiment, the third light processing surface 203 is a filter installed at the light outlet of the reflective cup, which is connected to the end of the second light processing surface 201 .

[0058] In another embodiment of the present application, the lighting device further includes a light conditioning layer 500 disposed in the direction of the optical axis 400. The light conditioning layer 500 may be disposed on the light exit surface of the first light distribution unit 100 or the second light distribution unit 200, or on both the first light distribution unit 100 and the second light distribution unit 200. The light conditioning layer 500 preferably passes through the optical axis 400 and is configured to block or attenuate non-reflected light emitted from the light source 300. Among the light emitted from the light source 300, after the primary light reaches the first light processing surface 101, it undergoes simultaneous refraction, reflection, and absorption. If the first light processing surface 101 is not a continuous smooth surface, light leakage is likely to occur at the boundaries of its contour. Alternatively, if the first light processing surface 101 is a rotational structure centered on the optical axis 400, forming a concave or convex vertex at the intersection with the optical axis 400, light leakage is also likely to occur, resulting in the emission of stray light. The light from the light source 300 along the optical axis 400 has a greater light intensity than other light rays emitted at an angle to the optical axis 400. If stray light is mixed into the final emitted light beam, it will not only cause uneven light intensity, but also easily cause glare problems. Figure 8 In the embodiment, a light adjustment layer 500 is provided on the outer surface of the first light processing surface 101 to reduce the emission of stray light, improve the uniformity of the emitted light, and avoid glare.

[0059] Furthermore, the light conditioning layer 500 can be implemented by adding or modifying specific optical materials or structures on the optical interface. For example, in one implementation, when a lens is used in the first light distribution unit 100 or the second light distribution unit 200, the light conditioning layer 500 is disposed on the outer end surface of the first light distribution unit 100 along the light output direction or the light output surface of the second light distribution unit 200. The light conditioning layer 500 can be a metal reflective film layer, a filter film layer, or a diffuse reflective film layer. Other materials or structures with light reflection, absorption, or attenuation functions can also be used.

[0060] On the other hand, the present application also provides a lighting system, which includes a ceiling and the above-mentioned lighting device, which is connected to the ceiling and also includes an illumination target arranged along the optical axis 400. The three-level light emitted by the lighting device is distributed on the illumination target. When used in indoor lighting scenes, the illumination target can be a wall, in which case the lighting device illuminates it obliquely downward; the illumination target can also be the floor of an aisle, in which case the lighting device illuminates it vertically downward. The lighting system can also be used in places where people are active. When a person is within the illumination range of the lighting device, the human eye receives the emitted three-level light. Since the intensity of the three-level light has been weakened and uniformed, the glare problem in the prior art has been eliminated, and the user comfort is improved.

[0061] According to the above-mentioned lighting device and lighting system, the present application also provides a lighting method, which includes the following steps:

[0062] S101, performing a primary light distribution on the primary light emitted by the light source 300, so that the primary light is deflected at a first angle relative to the optical axis 400 to form a secondary light;

[0063] S102, performing secondary light distribution on the second light, so that the secondary light is deflected at a second angle relative to the optical axis 400 to form a tertiary light, wherein the second angle is smaller than the first angle, and the intensities of the primary light, the secondary light, and the tertiary light decrease in sequence;

[0064] S103 , projecting the tertiary light onto an illumination target arranged along the direction of the optical axis 400 .

[0065] Through the above-mentioned lighting method, after the light emitted by the light source passes through the cooperation of the first light distribution part and the second light distribution part, the light is redistributed and emitted uniformly, thereby evenly distributing the light of a single light source and the light intensity on the light-emitting surface, avoiding the problem of excessively high light intensity in local areas, especially in the light-emitting area along the optical axis, and reducing the problem of glare.

[0066] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A lighting device, characterized in that: The invention comprises a light source (300) and a first light distribution portion (100) and a second light distribution portion (200) sequentially arranged along the optical axis (400) of the light source (300), wherein the first light distribution portion (100) is arranged in the light emitting direction of the light source (300), and the second light distribution portion (200) is connected to the first light distribution portion (100), wherein: The first light distribution portion (100) includes a first light processing surface (101), the light emitted by the light source (300) to the first light distribution portion (100) includes a plurality of primary light rays reaching the first light processing surface (101), and the first light processing surface (101) is configured to receive the primary light rays and process them into secondary light rays deflected at a first angle relative to the optical axis (400); The second light distribution portion (200) includes a second light processing surface (201), which is arranged in a circumferential direction of the light source (300) and the first light processing surface (101) and is used for receiving the secondary light and processing the second light processing surface into a tertiary light deflected at a second angle relative to the optical axis (400); Furthermore, the area of the second light processing surface (201) is larger than that of the first light processing surface (101).

2. The lighting device according to claim 1, wherein The first light distribution portion (100) and the second light distribution portion (200) are arranged at intervals, or are arranged in a coordinated connection, or are integrally formed.

3. The lighting device according to claim 1, wherein The second angle is smaller than the first angle.

4. The lighting device according to claim 1, wherein The first light processing surface (101) is configured to allow the primary light to be totally reflected inside the first light distribution portion (100) or reflected on the outer surface of the first light distribution portion (100).

5. The lighting device according to claim 1, wherein The second light processing surface (201) is configured to allow the secondary light to be totally reflected inside the second light distribution portion (200) or reflected on the outer surface of the second light distribution portion (200).

6. The lighting device according to claim 1, wherein The second light processing surface (201) comprises a plurality of adjacently connected sub-processing surfaces (202), and the included angle formed between any adjacent sub-processing surfaces (202) is an obtuse angle.

7. The lighting device according to claim 1, wherein The first light processing surface (101) is the inner interface or outer surface of the first light distribution portion (100), and / or the second light processing surface (201) is the inner interface or outer surface of the second light distribution portion (200).

8. The lighting device according to claim 7, wherein: The first light processing surface (101) and / or the second light processing surface (201) is a rotation structure centered on the optical axis (400) or an axisymmetric structure with the optical axis (400) as the axis of symmetry.

9. The lighting device according to claim 1, wherein The invention also includes a third light processing surface (203) arranged in the light emitting direction of the tertiary light. The third light processing surface (203) is arranged on the second light distribution part (200) or connected to the second light distribution part (200) and is configured to be able to diffuse or converge the tertiary light.

10. The lighting device according to claim 9, wherein The third light processing surface (203) is a flat light-transmitting surface or a flat-convex light-transmitting surface.

11. The lighting device according to claim 1, wherein The invention also includes a light adjustment layer (500) arranged in the direction of the optical axis (400), wherein the light adjustment layer (500) is arranged on the outer end surface of the first light distribution portion (100) or the outer end surface of the second light distribution portion (200), and is configured to block or weaken non-reflected light emitted from the light source (300).

12. A lighting system, characterized in that: The invention comprises a ceiling and a lighting device as claimed in any one of claims 1 to 11, wherein the lighting device is connected to the ceiling and further comprises an illumination target arranged along the optical axis (400), and the three-level light emitted by the lighting device is distributed on the illumination target.

13. A lighting method, characterized in that: The lighting system according to claim 12 comprises the following steps: S101, performing a primary light distribution on the primary light emitted by the light source (300), so that the primary light is deflected at a first angle relative to the optical axis (400) to form a secondary light; S102, performing secondary light distribution on the second light, so that the secondary light is deflected at a second angle relative to the optical axis (400) to form a tertiary light, wherein the second angle is smaller than the first angle, and the intensities of the primary light, the secondary light, and the tertiary light decrease in sequence; and S103, projecting the tertiary light onto an illumination target arranged along the direction of the optical axis (400).

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