Projection illumination system and luminaire

Abstract

This invention provides a projection lighting system and lamp. The projection lighting system includes a frame, a projection device, a reflector, and a light outlet. The projection device is mounted within the frame and is inclined relative to the horizontal plane. The reflector is mounted on the frame and located in the light-emitting direction of the projection device to reflect the light emitted by the projection device. The light outlet is located on the side of the frame opposite to the projection device, allowing the light reflected by the reflector to exit and form a light spot on the ground or wall. At least one of the projection device and the reflector is configured to rotate, making the position of the light spot adjustable. Compared with the prior art, this invention uses the reflector to reflect the light emitted by the projection device to the light outlet to form a light spot on the wall or ground, simulating the effect of sunlight shining through a window. Rotating the projection device or the reflector can change the position of the light spot, thereby allowing the position of the light spot to be adjusted as needed, thus simulating the dynamic changes of natural light spots.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, and more particularly to a projection lighting system and lamp. Background Technology

[0002] Skylights are a type of flat panel light that uses a light source to illuminate a Rayleigh plate, creating a Rayleigh scattering optical phenomenon. When the light source is lit, it can emit blue light into the environment to simulate the visual effect of a blue sky.

[0003] Compared to existing flat panel lights, skylights achieve better lighting effects through Rayleigh scattering. However, most existing skylights use fixed light sources and optical systems, which cannot move with the changing position of the sun like sunlight. As a result, the position and shape of the light spot remain unchanged over a long period of time, lacking the dynamic change effect of natural light spots.

[0004] In view of this, it is indeed necessary to propose a projection lighting system and luminaire to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a projection lighting system and lamp that can adjust the position of the light spot.

[0006] Therefore, the technical solution of the present invention provides a projection lighting system, comprising:

[0007] frame;

[0008] The projection device is assembled within a frame and is tilted relative to the horizontal plane.

[0009] A reflector, assembled on the frame and located in the light-emitting direction of the projection device, to reflect the light emitted by the projection device;

[0010] The light outlet is located on the side of the frame away from the projection device, allowing light reflected by the reflector to be emitted and form a light spot on the ground or wall.

[0011] In this embodiment, at least one of the projection device and the reflector is configured to be rotatable, so that the position of the light spot is adjustable.

[0012] Optionally, a light-blocking component is also included within the frame, located between the light outlet and the projection device, to block the direct light emitted by the projection device.

[0013] Optionally, the reflector is mounted on the inner wall of the frame, and the light-blocking component is located directly below the projection direction of the reflector.

[0014] Optionally, the height of the light spot formed by the projection device on the wall is positively correlated with the angle of tilt of the projection device relative to the horizontal plane.

[0015] Optionally, at the same spot position, when only the projection device rotates, the absolute value of the angle of rotation of the projection device is the first angle, and when only the reflector rotates, the absolute value of the angle of rotation of the reflector is the second angle, and the first angle is twice the second angle.

[0016] Optionally, the height of the light spot formed by the projection device on the wall is negatively correlated with the angle of the reflector's forward rotation relative to the frame, and the height of the light spot formed by the projection device on the wall is positively correlated with the angle of the reflector's reverse rotation relative to the frame.

[0017] Optionally, the reflector includes a first end near the projection device and a second end near the light outlet. When the reflector rotates forward relative to the frame, the first end is lower than the second end, and when the reflector rotates backward relative to the frame, the second end is lower than the first end.

[0018] Optionally, as the angle of tilt of the projection device relative to the horizontal plane becomes smaller and smaller, and the angle of rotation of the reflector relative to the frame becomes larger and larger, the height of the light spot formed by the projection device on the wall becomes lower and lower.

[0019] Therefore, the present invention also provides a lamp, including a surface light source lighting system and the aforementioned projection lighting system, wherein the projection lighting system is mounted on the outside of the surface light source lighting system.

[0020] Optionally, the shape of the light spot formed on the wall by the light emitted by the projection lighting system matches the shape of the surface light source emitted by the surface light source lighting system.

[0021] Compared with the prior art, the technical solutions of the embodiments of the present invention have the following beneficial effects:

[0022] This invention, by setting the projection device at an angle relative to a horizontal plane, allows the emitted light to enter a reflector, which then reflects the light from the projection device back to the light outlet, thereby creating a light spot on a wall or floor, simulating the effect of sunlight filtering through a window indoors. Furthermore, rotating at least one of the projection device and the reflector changes the position of the light spot, allowing for adjustment as needed, thus simulating the dynamic changes in natural light spots as the sun's position changes. Attached Figure Description

[0023] Figure 1 This is an installation diagram of a lamp conforming to a preferred embodiment of the present invention;

[0024] Figure 2 yes Figure 1 Schematic diagram of the structure of the lamp;

[0025] Figure 3 yes Figure 2 A structural diagram from another angle;

[0026] Figure 4 yes Figure 2 A sectional view of the central lighting fixture;

[0027] Figure 5 yes Figure 2 Exploded view of the installation of the lighting fixtures;

[0028] Figure 6 This is a visual effect diagram of a lamp simulating a blue sky, conforming to a preferred embodiment of the present invention;

[0029] Figure 7 This is a visual effect diagram of a lamp simulating a blue sky from another angle, conforming to a preferred embodiment of the present invention;

[0030] Figure 8 yes Figure 6 Visual effect diagram simulating white light from surface light source lighting system and side light source lighting system of central luminaire;

[0031] Figure 9 yes Figure 6 Visual effect diagram simulating colored light from the surface light source lighting system and the side light source lighting system of the luminaire;

[0032] Figure 10 This is a schematic diagram of the projection lighting system conforming to a preferred embodiment of the present invention;

[0033] Figure 11 yes Figure 10 Optical path diagram of a projection lighting system;

[0034] Figure 12 This is a schematic diagram of the projection device conforming to a preferred embodiment of the present invention;

[0035] Figure 13 yes Figure 12 A schematic diagram of the structure of the second lens in the middle;

[0036] Figure 14 yes Figure 12 A schematic diagram of the structure of the third lens in the middle;

[0037] Figure 15 This is a schematic diagram showing the dimensional relationship between the projection device, reflector, and light outlet according to a preferred embodiment of the present invention.

[0038] Figure 16 This is a schematic diagram showing the relationship between the installation distance of the lamps, the tilt of the projection device, and the size of the light spot on the wall, which conforms to a preferred embodiment of the present invention.

[0039] Figure 17 This is the optical path diagram of the projection device conforming to the preferred embodiment of the present invention;

[0040] Figure 18This is the optical path diagram of the third lens conforming to a preferred embodiment of the present invention;

[0041] Figure 19 This is a schematic diagram of the shape of the reflector and the light spot according to an embodiment of the present invention;

[0042] Figure 20 This is a schematic diagram of the shape of the reflector and the light spot according to another embodiment of the present invention;

[0043] Figure 21 This is a schematic diagram of the shape of the reflector and the light spot according to a preferred embodiment of the present invention;

[0044] Figure 22 This is an optical path diagram of the rotating projection device and reflector in a projection lighting system conforming to an embodiment of the present invention;

[0045] Figure 23 yes Figure 22 Simulation diagram of the movement of the wall spot position corresponding to different tilt angles of the rotating projection device;

[0046] Figure 24 yes Figure 22 Simulation diagram of the movement of the wall spot position corresponding to different rotation angles of the central reflector;

[0047] Figure 25 yes Figure 22 Simulation diagram of the structure where the projection device and reflector are rotated to different angles to move the light spot positions on the wall.

[0048] Figure label:

[0049] Frame 1, projection device 2, housing 21, light source module 22, light source 221, light source board 222, optical module 23, first lens 231, second lens 232, sawtooth structure 2321, third lens 233, substrate 2331, sub-lens 2332, reflector 3, first end 31, second end 32, light outlet 4, light blocking component 5, light spot 6, projection lighting system 100;

[0050] A surface light source lighting system 200, a main light source board 201, a first multi-color lamp bead 2011, a diffuser plate 202, a transparent plate 203, and a main light-emitting surface 204;

[0051] Side-emitting lighting system 300, auxiliary light source board 301, second multi-color lamp bead 3011, side-emitting light surface 302, virtual image 303;

[0052] Light fixture 400, lamp housing 401, top wall 4011, frame 4012. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0055] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] Please see Figures 1 to 25 As shown, an embodiment of the present invention provides a lamp 400. The lamp 400 includes a projection lighting system 100, a surface light source lighting system 200, and a side-emitting lighting system 300. The surface light source lighting system 200 is configured to simulate sunlight at different times of day in nature, similar to the sky, and can realize various scenes such as blue sky, white clouds, and rainbows. The side-emitting lighting system 300 is positioned outside the surface light source lighting system 200, and is configured to simulate the effect of sunlight shining on the edge of a skylight. Additionally, the side-emitting lighting system 300 can also form a virtual image 303 within the surface light source lighting system 200. The projection lighting system 100 is disposed to the side of the side-emitting lighting system 300 and outside the surface light source lighting system 200, and is configured to form a light spot 6 on the ground or wall surface.

[0057] Please see Figures 1 to 5 As shown, the luminaire 400 includes a lamp housing 401, which includes a top wall 4011 disposed opposite to the lamp housing 4011 and a frame 4012 extending from the top wall 4011 in a direction away from the top wall 4011. The top wall 4011 is mounted on a mounting base, and the luminaire 400 is generally installed by fixing the top wall 4011 to a wall or ceiling.

[0058] A surface light source illumination system 200 is installed between the frame 4012 and the top wall 4011. The surface light source illumination system 200 includes a main light source plate 201, a diffuser plate 202, a transparent plate 203, and a main light-emitting surface 204 arranged sequentially according to height. The main light source plate 201 is installed on the top wall 4011, and several sets of first multi-color LED beads 2011 are integrated on the main light source plate 201 to provide a multi-color surface light source. Specifically, at least two sets of first multi-color LED beads 2011 are integrated on the main light source plate 201, and at least two types of first multi-color LED beads 2011 are capable of emitting light of at least two spectra. The at least two types of first multi-color LED beads 2011 are staggered, and adjacent light-emitting units of the same type are inverted. Different lighting effects can be achieved by using first multi-color LED beads 2011 of different colors. Furthermore, by alternating different types of first multi-color LED beads 2011 and reversing the distribution of the same type of first multi-color LED beads 2011, the surface light source lighting system 200 emits more uniform light color, simulating the color of sunlight at different times and achieving dynamic lighting effects. Through the layout and control of multiple sets of first multi-color LED beads 2011 on the main light source board 201, the surface light source lighting system 200 can accurately simulate and present various complex surface scenes, such as clouds and blue skies.

[0059] In some embodiments, the first multi-color LED bead 2011 can emit light of the same color. In other embodiments, a diffuser plate 202 is mounted on the side of the main light source plate 201 near the frame 4012, with both ends of the diffuser plate 202 abutting against the frame 4012. Furthermore, the diffuser plate 202 is located on the light-emitting path of the first multi-color LED bead 2011, used to uniformly distribute the light emitted by the first multi-color LED bead 2011 and eliminate the graininess of the light. Preferably, the diffuser plate 202 contains scattering particles (not shown). In this embodiment, the scattering particles are nano-sized titanium dioxide particles, causing some of the light emitted by the first multi-color LED bead 2011 to undergo Rayleigh scattering within the diffuser plate 202, resulting in a sky-like blue color on the main light-emitting surface 204. Figure 6 and Figure 7 As shown.

[0060] A transparent plate 203 is positioned on the side of the diffuser plate 202 facing away from the first multi-color LED bead 2011, and the side of the transparent plate 203 facing away from the diffuser plate 202 is a mirror. The light emitted by the side-emitting lighting system 300 is at least partially projected onto the transparent plate 203 and reflected by the transparent plate 203, forming a virtual image 303 on the mirror surface. This simulates the effect of a window shadow formed on a window when one side of the window is illuminated by sunlight, giving the viewer a sense of depth and transparency.

[0061] The reflectivity of the transparent plate 203 is greater than its transmittance, thereby restricting external light from entering the transparent plate 203 from the light-emitting surface. Optionally, the transparent plate 203 can be made of inorganic materials, such as quartz glass. The transparent plate 203 can also be made of organic materials, such as acrylic glass or other polymeric transparent materials; this invention does not limit the specific materials used.

[0062] A side-emitting lighting system 300 is mounted on a frame 4012 and surrounds the main light-emitting surface 204 of the surface light source lighting system 200. The side-emitting lighting system 300 has a side-emitting surface 302 attached to the side of the frame 4012 near the main light-emitting surface 204. The side-emitting lighting system 300 includes an auxiliary light source plate 301 and a diffuser (not shown). The auxiliary light source plate 301 is mounted inside the frame 4012, and the diffuser is mounted on the side of the auxiliary light source plate 301 near the side-emitting surface 302. Several sets of second multi-color LEDs 3011 are integrated on the auxiliary light source plate 301 for emitting multi-color light. The side-emitting lighting system 300, through the second multi-color LEDs 3011, can simulate a window shadow similar to sunlight shining on the edge of a window. The diffuser is located in the light path of the second multi-color LEDs 3011. The light emitted by the second multi-color LED bead 3011 is directed away from the frame 4012. After being diffused by the diffuser, it forms a window shadow with variable color on the side-emitting light surface 302.

[0063] In some embodiments, the side-emitting lighting system 300 can be installed on one side of the frame 4012, and a light-shielding member (not shown) is provided on the other side of the frame 4012. The side-emitting lighting system 300 also includes a non-light-emitting surface (not shown) corresponding to the light-shielding member. The non-light-emitting surface is disposed away from the frame 4012, and a light / shadow transition zone is formed between the non-light-emitting surface and the side-emitting surface 302 to simulate sunlight shining from one side, illuminating one side of the window, while forming a dark side on the other side of the window, making the display effect more realistic. The side-emitting surface 302 and the non-light-emitting surface are connected in a ring and together form a ring surface around the outer periphery of the main light-emitting surface 204. The light / shadow transition zone is located at the junction of the side-emitting surface 302 and the non-light-emitting surface. The function of the light / shadow transition zone is to form a light-dark boundary area between the side-emitting surface 302 and the non-light-emitting surface. It can be a continuously changing area from bright to dark, or it can be a clear dividing line.

[0064] Please see Figure 8 As shown, in some embodiments, both the first multicolor LED bead 2011 and the second multicolor LED bead 3011 emit white light, and the diffuser plate 202 does not contain scattering particles, so that the light emitted from the main light-emitting surface 204 is white light, and the window shadow generated by the side-emitting lighting system 300 is also white.

[0065] Please see Figure 9As shown, in some other embodiments, the first multicolor LED 2011 and the second multicolor LED 3011 both emit multiple colors of light, and the diffuser plate 202 does not contain scattering particles, so that the light emitted from the main light-emitting surface 204 is colored light, and the window shadow produced by the side-emitting lighting system 300 is also colored.

[0066] Please see Figures 10 to 14 As shown, the projection lighting system 100 is mounted on the side-emitting lighting system 300 and emits light towards the side-emitting lighting system 300. The projection lighting system 100 includes a frame 1 and a projection device 2, a reflector 3, and a light outlet 4 disposed within the frame 1. The projection device 2 is mounted on one side of the frame 1 and is inclined relative to the horizontal plane for emitting light. The reflector 3 is mounted on the top inner sidewall of the frame 1 and is located in the light-emitting direction of the projection device 2 to reflect the light emitted by the projection device 2. In this embodiment, the reflector 3 is a mirror. The light outlet 4 is opened on the sidewall of the frame 1, located on the side of the frame 1 opposite to the projection device 2, and the light outlet 4 faces the side-emitting lighting system 300. The projection lighting system 100 is used to simulate sunlight passing through a window to form a light spot 6, i.e., the shadow of the sun. Specifically, the light emitted by the projection device 2 is reflected by the reflector 3 and emitted from the light outlet 4, forming a light spot 6 on the ground or wall surface that matches the shape of the surface light source emitted by the surface light source lighting system 200. Furthermore, the position of the light spot 6 is on the same side of the lamp 400 as the position where the window shadow is formed.

[0067] To prevent stray light from the projection device 2 from directly exiting through the light outlet 4 and forming stray light on the light spot 6, thus affecting the sharpness of the cutoff line of the light spot 6, the projection lighting system 100 also includes a light-blocking member 5 disposed within the frame 1. The light-blocking member 5 is located between the light outlet 4 and the projection device 2 and is configured to block the direct light from the projection device 2. The light-blocking member 5 is black and can absorb the direct light from the projection device 2, effectively avoiding the impact of stray light on the sharpness of the light spot 6.

[0068] In some preferred embodiments, the light-blocking element 5 is located directly below the projection direction of the reflector 3 to ensure that most of the light emitted from the projection device 2 is reflected by the light-blocking element 5 and then emitted from the light outlet 4. The light-blocking element 5 effectively prevents direct light from escaping from the light outlet 4, thus acting as a light cutoff and filtering out stray light beyond the set area, ensuring a clear cutoff line for the light spot 6.

[0069] The inner surface of frame 1 often reflects light, generating stray light. Furthermore, to prevent stray light generated inside frame 1 from escaping through the light outlet 4 and affecting the clear cutoff line of the light spot 6, the inner surface of frame 1 is made black. Specifically, frame 1 can be made of black material, or a black light-absorbing film layer can be applied to the inner surface of frame 1, or a black coating can be sprayed onto the inner surface of frame 1 (not shown). The light-absorbing film layer / black coating does not cover the reflector 3 to ensure that the reflector 3 reflects light normally. The light-absorbing film layer / black coating absorbs the reflected light from the inner surface of frame 1, allowing only the light reflected by the reflector 3 to exit through the light outlet 4, effectively filtering stray light to form a clear light spot 6 on the ground or wall, resulting in a more distinct and clear cutoff line for the light spot 6.

[0070] Specifically, the projection device 2 includes a housing 21 and a light source module 22 assembled within the housing 21. The light source module 22 includes a light source plate 222 and a light source 221 fixed on the light source plate 222. In this embodiment, the light source plate 222 is an aluminum substrate, and the light source 221 is an LED. The light source 221 is used to emit light, some of which is absorbed by the light-blocking member 5; some of the light is reflected by the reflector 3 to the light outlet 4.

[0071] The projection device 2 also includes an optical module 23 assembled within the housing 21, which is positioned opposite to the light source module 22. The optical module 23 includes a first lens 231, a second lens 232, and a third lens 233 arranged sequentially in the light-emitting direction of the light source module 22. The first lens 231 is mounted on the light source plate 222 and covers the outside of the light source 221. The first lens 231 is configured to compress the light emission angle of the light source module 22. The side of the first lens 231 away from the light source 221 (i.e., the light-emitting surface) is a convex structure, capable of refracting the light emitted from the light source 221. This convex structure can be a hemispherical structure or an ellipsoidal structure, so that the light emitted from the light source 221 can undergo two refractions through the incident and emitting surfaces of the first lens 231, achieving the purpose of compressing the light emission angle. In other words, the light source 221 focuses and shapes the light beam through the first lens 231 to converge the light. Preferably, the light emitted by the light source 221 has an exit angle of 105° to 135°, but the light emitted after passing through the first lens 231 has an exit angle of 35° to 55°, which effectively improves the utilization rate of light and allows more light to enter the second lens 232.

[0072] In some embodiments, the light source 221 is an LED chip. Since the LED chip generates significant heat during operation, and the first lens 231 is close to the light source 221, the first lens 231 needs to have good temperature resistance. To meet this requirement, the first lens 231 is made of high-temperature resistant materials such as silicone or glass. This design ensures the stability of the first lens 231 in high-temperature operating environments, guaranteeing its light-converging function and effectively compressing the light emission angle of the light source 221.

[0073] Preferably, when the light source 221 is a high-power LED, the light source module 22 also includes a heat sink (not shown), which is used for rapid heat dissipation to ensure the normal operation of the light source 221.

[0074] The second lens 232 is configured to collimate the light rays emitted from the first lens 231, mimicking parallel sunlight. In this embodiment, the second lens 232 is a Fresnel lens, and the light-emitting surface of the Fresnel lens has a sawtooth structure 2321, such as... Figure 13 As shown. The light rays emitted from the first lens 231 enter the Fresnel lens and are collimated out from the sawtooth structure 2321.

[0075] The serrated structure 2321 includes a plurality of serrations arranged in a plurality of sorted manner. In some embodiments, each serration has an equal tooth height, and the serrations closer to the center of the light-emitting surface of the second lens 232 are wider and the spacing between two adjacent serrations is also larger. Correspondingly, the serrations closer to the end of the second lens 232 are narrower and the spacing between two adjacent serrations is also smaller.

[0076] In other embodiments, each sawtooth has an equal width, and the sawtooth height decreases as it approaches the center of the light-emitting surface. Correspondingly, the sawtooth height increases as it approaches the end of the second lens 232.

[0077] Furthermore, the second lens 232 is fixed above the first lens 231 and maintains a certain distance from the first lens 231, providing a certain installation and manufacturing tolerance. In some embodiments, the focal length of the second lens 232 is defined as f, then the distance between the second lens 232 and the first lens 231 is f ± 10 mm.

[0078] In some preferred embodiments, the distance between the second lens 232 and the first lens 231 is f ± 7 mm, which minimizes light loss during transmission and allows the light compressed by the first lens 231 to be collimated and emitted through the second lens 232. In other words, the light is emitted in a nearly parallel manner, mimicking the effect of sunlight. Because the sun is very far from the earth, the light illuminating the ground is approximately parallel.

[0079] In some preferred embodiments, the second lens 232 may be made of transparent optical materials such as PMMC, PC and silicone, and no limitation is set here.

[0080] The third lens 233 is used to shape the light emitted through the second lens 232 to form a light spot 6 of a preset shape. To ensure visual effect, the shape of the light spot 6 needs to be adapted to the shape of the surface light source illumination system 200. In this embodiment, the third lens 233 is a compound eye lens, which includes a base 2331 and a plurality of sub-lenses 2332 arranged in an array on one side of the base 2331, such as... Figure 14 As shown. Each sub-lens 2332 can independently adjust the light, thereby achieving precise control over the overall light. Furthermore, the cross-sectional shape of the sub-lens 2332 in the horizontal direction is the same as the shape of the formed light spot 6. This characteristic allows the third lens 233 to shape the light into various preset shapes of light spots 6 as needed, meeting the requirements of the surface light source illumination system 200 for different shaped light spots 6. Therefore, by selecting appropriate compound eye lenses, light spots 6 that match the shape of the surface light source illumination system 200 can be emitted. Preferably, the shape of the light spot 6 formed on the wall by the light emitted from the projection lighting system 100 matches the shape of the surface light source emitted by the surface light source illumination system 200. For example, the light spot 6 of the square luminaire 400 is square, and the light spot 6 of the round luminaire 400 is round.

[0081] Please see Figure 15 As shown, this study explores the relationship between the dimensions of the projection device 2, the reflector 3, and the light outlet 4. Let the height of the projection device 2 be H, the width of the projection device 2 be L, the height of the frame 1 be HH, the width of the frame 1 be LL, the width of the reflector 3 be LW, the angle of inclination of the projection device 2 relative to the horizontal plane be θ (i.e., the tilt angle at which the projection device 2 is installed is θ), the light outlet angle of the compound eye lens be β, and the shortest distance between the top surface of the frame 1 and the projection device 2 be a. On the extension of a, the distance between the optical module 23 and the bottom surface of the frame 1 is c. Since a, b, and c are collinear and on the same height line, the distance between a and c is b, and the sum of a, b, and c is the internal height of the frame 1. The projection device 2 is furthest from the bottom surface of the frame 1. The distance between the parallel optical axis rays emitted from the farthest end of the bottom surface of frame 1 by the compound eye lens and projection device 2 and the reflector 3 is δLL. The distance between the parallel optical axis rays emitted from the farthest end of the bottom surface of frame 1 by projection device 2 and the reflector 3 is δLR. In practical applications, δLR > δLL. The distance between the parallel optical axis rays emitted from the farthest end of the bottom surface of frame 1 by projection device 2 and the parallel optical axis rays emitted from the farthest end of the bottom surface of frame 1 by projection device 2 and the reflector 3 is L1. The height distance between the light-blocking member 5 and the reflector 3 is H1. Then:

[0082] c = H * cosθ;

[0083] b = L * sinθ;

[0084] a=HH-bc=HH-L*sinθ-H*cosθ;

[0085] δLL=HH-L*sinθ-H*cosθ*tanθ-tanθ-β;

[0086] L1 = L / cosθ;

[0087] δLR=HH-H*cosθ*tanθ+β-tanθ;

[0088] Therefore: the width LW of the reflective member 3=δLL+L1+δLR=HH-L*sinθ-H*cosθ*tanθ-tanθ-β+L / cosθ+HH-H*cosθ*tanθ+β-tanθ.

[0089] As can be seen from the above formula, the width LW of the reflector 3 is only related to the height HH of the frame 1, the width L of the projection device 2, the light output angle β of the compound eye lens, and the tilt angle θ of the projection device 2.

[0090] H1=LW / (sin(θ+β) / cos(θ+β)+sin(β-θ) / cos(β-θ));

[0091] Therefore: the height of the light barrier is: HH-H1=HH-LW / (sin(θ+β) / cos(θ+β)+sin(β-θ) / cos(β-θ))=HH-HH-L*sinθ-H*cosθ *tanθ-tanθ-β+L / cosθ+HH-H*cosθ*tanθ+β-tanθ / (sin(θ+β) / cos(θ+β)+sin(β-θ) / cos(β-θ)).

[0092] Therefore, the height of the light-blocking plate is only related to the height HH of the frame 1, the width L of the projection device 2, the light output angle β of the compound eye lens, and the tilt angle θ of the projection device 2.

[0093] In some embodiments, the height of the light-blocking member 5 may be lower than the height of the light-emitting port 4. In this case, some stray light will be emitted from the light-emitting port 4, affecting the clarity of the light spot 6.

[0094] In a preferred embodiment, the height of the light blocking member 5 is equal to the height of the light exit 4, which can maximize the light blocking effect of the light blocking member 5, effectively block the light directly emitted from the projection device 2 through the light exit 4, significantly reduce the influence of stray light on the light spot 6, and thus form a clearly cutoff light spot 6 on the ground or wall surface. Similarly, it can be concluded that the height H3 of the light exit 4 is only related to the height HH of the frame 1, the width L of the projection device 2, the light exit angle β of the fly-eye lens, and the tilt angle θ of the installation of the projection device 2.

[0095] Please refer to Figures 16-17 As shown, define the installation distance as La, the lens light exit angle as β, the angle of inclination of the projection device 2 relative to the horizontal plane as θ, define the angle between the optical axis and the horizontal plane as γ, and, θ and γ are complementary angles, θ + γ = 90°.

[0096] The height of the light spot 6 on the wall is W, the projection length of the wall light spot 6 in the direction perpendicular to the optical axis is Wa, the optical path is Lb, the distance between the intersection point of the light spot 6 and the optical axis and the virtual image 303 is Lc, and the width of the projection device 2 is L.

[0097] Wa = W * cosγ; ①

[0098] Lb = La / cosγ; ②

[0099] Lc = Lb - 0.5 * W * sinγ; ③

[0100] Wa = L + 2 * Lc * tanβ; ④

[0101] By solving the equations ① - ④ simultaneously, we can obtain:

[0102] W * cosγ = L + 2 * La / cosγ - 0.5 * W * sinγ * tanβ; ⑤

[0103] γ = 90° - θ; ⑥

[0104] By solving the equations ⑤ - ⑥ simultaneously, we can obtain:

[0105] W * sinθ = L + 2 * La / sinθ - 0.5 * W * cosθ * tanβ; ⑦

[0106] Since L << La and L << W, L can be ignored, then:

[0107] W * sinθ = 2 * La / sinθ - 0.5 * W * cosθ * tanβ. ⑧

[0108] Formula ⑧ illustrates the relationship between the installation distance La, the light emission angle β of the compound eye lens, and the height W of the light spot 6 on the wall. Therefore, the design and installation must satisfy this relationship. The remaining unknown term can be calculated from any two of the installation distance La, the light emission angle β of the compound eye lens, and the height W of the light spot 6 on the wall, to guide the installation. For example, the required installation distance La can be calculated based on the light emission angle β of the compound eye lens and the height W of the light spot 6 on the wall.

[0109] From formula ⑧, we know that: β=Atn((W*sinθ) / (2*La / sinθ-0.5*W*cosθ)).

[0110] Please see Figure 17 As shown, the angle of light after passing through the compound eye lens is defined as β. Given the width W of the light spot 6 to be illuminated, the installation distance La of the lamp 400, and the tilt angle θ of the projection device 2, the exit angle β of the projection device 2 after passing through the compound eye lens can be calculated (before passing through the compound eye lens, the light is approximately parallel).

[0111] Similarly, based on the installation conditions and the size requirements of the light spot 6, the angle of the light emitted from the projection device 2 in any direction after passing through the compound eye lens can be calculated. Please refer to [link / reference]. Figure 16 As shown, where β is the angle of the ray after passing through the compound eye lens; n is the refractive index of the compound eye lens, and n' is the refractive index of air; u and u' are the angle of incidence and the angle of exit, respectively. Therefore, according to Snell's theorem,

[0112] n*sinu=n'*sinu';

[0113] u' = u + β;

[0114] From the above formula, we can obtain: n*sinu=n'*sinu+β.

[0115] Given β, n, and n', u can be calculated. The surface shape of the sub-lens 2332 in the compound eye lens can be obtained through iterative algorithm. Then, the compound eye lens can be obtained by arranging them.

[0116] In some embodiments, the compound eye lens may not be provided, and the shape of the light spot 6 may be changed by altering the shape of the reflector 3. For example, when the projection device 2 forms a trapezoidal light spot 6, the shape of the light spot 6 can be adjusted from a trapezoid to a rectangle by assembling an inverted trapezoidal reflector 3.

[0117] Please see Figure 19 As shown, when the projection of the reflector 3 onto the horizontal plane is rectangular, the light spot 6 projected by the projection lighting system 100 is an inverted trapezoid.

[0118] Please see Figure 20As shown, the projection of the reflector 3 on the horizontal plane is an isosceles trapezoid. When the isosceles trapezoid has two interior angles between 92.5 and 95°, the light spot 6 projected by the projection lighting system 100 is trapezoidal.

[0119] Please see Figure 19 As shown, the projection of the reflector 3 onto the horizontal plane is an isosceles trapezoid. When the isosceles trapezoid has two interior angles of 97.5°, the light spot 6 projected by the projection lighting system 100 is approximately rectangular.

[0120] The angle of sunlight relative to the window varies at different times, meaning the position of the light spot 6 on the wall or ground changes as it passes through the window. Therefore, the light spot 6 needs to be designed to change its position over time. To simulate the light spot 6 formed by the sun at different times, the lamp 400 also has a built-in drive device. The drive device rhythmically rotates the projection device 2 or the reflector 3 within a certain angle to adjust the position of the light spot 6 on the ground or wall.

[0121] The driving device in this embodiment is not shown in the figure. The driving device can consist of a motor and a connecting rod. The motor drives the connecting rod to rotate, and the output end of the connecting rod is connected to the projection device 2 or the reflector 3, so that the connecting rod drives the projection device 2 or the reflector 3 to rotate. The driving device is not limited to the structure disclosed in this invention. The parameters of the connecting rod driving structure can be arbitrarily modified by those skilled in the art according to different application scenarios.

[0122] Please see Figure 22 As shown, the angle of inclination of the projection device 2 relative to the horizontal plane is defined as θ, the angle of rotation of the reflector 3 relative to the frame 1 in the forward direction is defined as α, and the angle of emitted light is defined as Φ. From the ray diagram, we know that Φ = θ + α. From the relationship between Φ, θ, and α, we can see that changing the position of the light spot 6 illuminating the wall can change θ, i.e., the installation tilt angle of the projection device 2, and also change the tilt angle of the reflector 3. The reflector 3 is a mirror or other component with reflective function. When α = 0, i.e., when the reflector 3 is placed horizontally, the angle of emitted light Φ is equal to the tilt angle θ of the projection device 2. As α changes, the angle of emitted light Φ also changes, thus changing the position of the light spot 6 on the wall. By adjusting the tilt angle of the reflector 3 or the tilt angle of the projection device 2, we can simulate the changes in the light spot 6 illuminating the wall at different times, thereby enhancing the realism and three-dimensionality of the light and shadow simulation.

[0123] Furthermore, at the same light spot 6 position, when only the projection device 2 rotates, the absolute value of the angle of rotation of the projection device 2 is the first angle, and when only the reflector 3 rotates, the absolute value of the angle of rotation of the reflector 3 is the second angle, and the first angle is twice the second angle.

[0124] In some embodiments, the reflector 3 remains stationary, typically by placing the reflector 3 flat. The position of the light spot 6 on the ground or wall is adjusted by rotating the projection device 2 and controlling the angle of inclination of the projection device 2 relative to the horizontal plane to be an acute angle.

[0125] Please see Figure 23 As shown, when the projection device 2 is tilted at an angle of 70° relative to the horizontal plane, the wall spot 6 formed by the projection lighting system 100 is located at the top of the wall. When the projection device 2 is tilted at an angle of 60° relative to the horizontal plane, the wall spot 6 formed by the projection lighting system 100 is located in the middle of the wall. When the projection device 2 is tilted at an angle of 50° relative to the horizontal plane, the wall spot 6 formed by the projection lighting system 100 is located at the bottom of the wall. According to the simulation results of the movement of the wall spot 6, the height of the wall spot 6 formed by the projection device 2 is positively correlated with the tilt angle of the projection device 2 relative to the horizontal plane. Similarly, it can be concluded that the distance between the wall spot 6 formed by the projection device 2 on the ground and the projection device 2 is negatively correlated with the tilt angle of the projection device 2 relative to the horizontal plane.

[0126] Please see Figure 23 As shown in the simulation results of the wall light spot 6's position movement, it can be seen that as the angle θ decreases, the wall light spot 6 moves downwards, similar to the sun's gradual change from morning to near noon. When θ = 70°, light spot 6 resembles the sun's light spot 6 at 7 AM; when θ = 60°, light spot 6 resembles the sun's light spot 6 at 9 AM; and when θ = 50°, light spot 6 resembles the sun's light spot 6 at 11 AM. Similarly, rotating the projection device 2 in the opposite direction increases the angle θ, causing the wall light spot 6 to move upwards, similar to the change in light spot 6 as the sun gradually changes from noon to near dusk. Therefore, the position of light spot 6 can be adjusted by rotating the reflector 3 to simulate the light spot 6 produced by natural light at different times. The lamp 400 is equipped with a control system that can control the rotation angle of the reflector 3 according to biological rhythms to obtain the light spot 6 at the corresponding time.

[0127] In some embodiments, the control system can automatically adjust the rotation angle of the reflector 3 or the projection device 2 according to biological rhythms, thereby precisely controlling the position of the light spot 6, so that the light spot 6 generated by the projection lighting system 100 is highly similar to the light spot 6 generated by outdoor sunlight, creating a realistic and natural light environment experience for users.

[0128] In other embodiments, users can also select the visual effect of the light spot 6 at different times via a program. The control system then drives the reflector 3 or the projection device 2 to rotate to the corresponding angle to project the light spot 6. Furthermore, the control system can also control the power of the light source module 22, allowing users to adjust the position or brightness of the light spot 6 according to their personal preferences or needs, satisfying diverse usage requirements. With this setup, users can enjoy the visual effects of the natural light spot 6 at different times of day indoors.

[0129] In other embodiments, the projection device 2 maintains the same tilt angle and adjusts the position of the light spot 6 on the ground or wall by rotating the reflector 3 through the drive device.

[0130] Preferably, the reflector 3 is rotated in either the forward or reverse direction with its center as the axis of rotation. Furthermore, the angle of rotation of the reflector 3 relative to the frame 1 is controlled to be an acute angle. The distance between the reflector 3 and the top surface of the frame 1 is 20 mm. The reflector 3 includes a first end 31 near the projection device 2 and a second end 32 near the light outlet 4. When the reflector 3 rotates in the forward direction relative to the frame 1, the first end 31 is lower than the second end 32; when the reflector 3 rotates in the reverse direction relative to the frame 1, the second end 32 is lower than the first end 31.

[0131] Please see Figure 24 As shown, when the reflector 3 is placed flat, the wall spot 6 formed by the projection lighting system 100 is located in the middle of the wall. When the reflector 3 rotates 5° relative to the frame 1 (α = 5°), the wall spot 6 formed by the projection lighting system 100 is located at the bottom of the wall. Based on the simulation results of the wall spot 6 position movement, the height of the light spot 6 formed by the projection device 2 on the wall is negatively correlated with the angle of rotation of the reflector 3 relative to the frame 1.

[0132] Please see Figure 24 As shown, when the reflector 3 is placed flat, the wall spot 6 formed by the projection lighting system 100 is located in the middle of the wall. When the reflector 3 rotates 5° in the opposite direction relative to the frame 1 (i.e., α = -5°), the wall spot 6 formed by the projection lighting system 100 is located at the top of the wall. Based on the simulation results of the movement of the wall spot 6, the height of the light spot 6 formed by the projection device 2 on the wall is positively correlated with the angle of the reverse rotation of the reflector 3 relative to the frame 1.

[0133] Please see Figure 24 As shown, the position of the light spot 6 on the ground or wall can be adjusted by rotating the reflector 3. Figure 22As can be seen, as angle α gradually increases from negative to positive, the light spot 6 on the wall moves downwards, similar to the sun's gradual change from morning to near noon. When α = -5°, light spot 6 resembles the light spot 6 illuminated by the sun at 7:00 AM; when α = 0°, light spot 6 resembles the light spot 6 illuminated by the sun at 9:00 AM; and when α = 5°, light spot 6 resembles the light spot 6 illuminated by the sun at 11:00 AM. Therefore, the position of light spot 6 can be adjusted by rotating reflector 3 to mimic the light spot 6 produced by natural light at different times. The lamp 400 is equipped with a control system that can control the rotation angle of reflector 3 according to biological rhythms to obtain the light spot 6 at the corresponding time.

[0134] In some embodiments, please refer to Figure 25 As shown, the position of the light spot 6 on the ground or wall is adjusted by simultaneously rotating the reflector 3 and the projection device 2. This reduces the required rotation angle range for both the reflector 3 and the projection device 2, thereby decreasing the overall size of the projection device 2. Figure 23 As can be seen, the simulated sun's light spot 6 gradually changes from morning to near noon. When θ = 65° and α = -2.5°, light spot 6 resembles the sun's light spot 6 at 7:00 AM; when θ = 62° and α = 1°, light spot 6 resembles the sun's light spot 6 at 9:00 AM; and when θ = 55° and α = 2.5°, light spot 6 resembles the sun's light spot 6 at 11:00 AM. This shows that as the angle of tilt of the projection device 2 relative to the horizontal plane decreases and the angle of rotation of the reflector 3 relative to the frame 1 increases, the height of the light spot 6 formed by the projection device 2 on the wall decreases. Therefore, the position of the light spot 6 can be adjusted by rotating the reflector 3 and the projection device 2 to simulate the light spot 6 formed on the wall or ground after the sun passes through the window at different times. The lamp 400 has a control system that can control the rotation angle of the reflector 3 according to biological rhythms to obtain the light spot 6 at the corresponding time.

[0135] In summary, this invention, by setting the projection device 2 at an angle relative to the horizontal plane, allows the light emitted from it to enter the reflector 3. The reflector 3 then reflects the light emitted from the projection device 2 to the light outlet 4, thereby forming a light spot on a wall or floor, simulating the effect of sunlight filtering through a window and creating a light spot indoors. Furthermore, rotating at least one of the projection device 2 and the reflector 3 can change the position of the light spot 6, allowing for adjustment of the position of the light spot 6 as needed, thus simulating the dynamic changes of a natural light spot as the sun's position changes.

[0136] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A projection lighting system, characterized in that, include: Framework (1); The projection device (2) is assembled inside the frame (1) and is inclined relative to the horizontal plane; A reflector (3) is assembled on the frame (1) and located in the light-emitting direction of the projection device (2) to reflect the light emitted by the projection device (2); The light outlet (4) is located on the side of the frame (1) away from the projection device (2) so that the light reflected by the reflector (3) can be emitted to form a light spot (6) on the ground or wall. At least one of the projection device (2) and the reflector (3) is configured to be rotatable, so that the position of the light spot (6) is adjustable.

2. The projection lighting system according to claim 1, characterized in that, It also includes a light-blocking member (5) disposed within the frame (1), the light-blocking member (5) being located between the light outlet (4) and the projection device (2) to block the light emitted directly from the projection device (2).

3. The projection lighting system according to claim 2, characterized in that, The reflector (3) is mounted on the inner wall of the frame (1), and the light-blocking member (5) is located directly below the projection direction of the reflector (3).

4. The projection lighting system according to claim 1, characterized in that, The height of the light spot (6) formed by the projection device (2) on the wall is positively correlated with the angle of inclination of the projection device (2) relative to the horizontal plane.

5. The projection lighting system according to claim 1, characterized in that, At the same spot (6) position, when only the projection device (2) rotates, the absolute value of the angle of rotation of the projection device (2) is the first angle, and when only the reflector (3) rotates, the absolute value of the angle of rotation of the reflector (3) is the second angle, and the first angle is twice the second angle.

6. The projection lighting system according to claim 1, characterized in that, The height of the light spot (6) formed by the projection device (2) on the wall is negatively correlated with the angle of positive rotation of the reflector (3) relative to the frame (1), and the height of the light spot (6) formed by the projection device (2) on the wall is positively correlated with the angle of reverse rotation of the reflector (3) relative to the frame (1).

7. The projection lighting system according to claim 6, characterized in that, The reflector (3) includes a first end (31) near the projection device (2) and a second end (32) near the light outlet (4). When the reflector (3) rotates forward relative to the frame (1), the first end (31) is lower than the second end (32). When the reflector (3) rotates in the opposite direction relative to the frame (1), the second end (32) is lower than the first end (31).

8. The projection lighting system according to claim 1, characterized in that, As the angle of inclination of the projection device (2) relative to the horizontal plane becomes smaller and smaller, and the angle of positive rotation of the reflector (3) relative to the frame (1) becomes larger and larger, the height of the light spot (6) formed by the projection device (2) on the wall becomes lower and lower.

9. A lamp, characterized in that, It includes a surface light source illumination system (200) and a projection illumination system (100) as described in any one of claims 1 to 8, wherein the projection illumination system (100) is mounted on the outside of the surface light source illumination system (200).

10. The lamp according to claim 9, characterized in that, The shape of the light spot (6) formed on the wall by the light emitted by the projection lighting system (100) matches the shape of the surface light source emitted by the surface light source lighting system (200).

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