Projection device, projection illumination system and lamp

Abstract

The utility model provides a projection device, a projection illumination system and a lamp. The projection device comprises a light source module and an optical module. The light source module comprises a light source. The optical module and the light source module are oppositely arranged. The optical module comprises a second lens and a third lens which are sequentially arranged in the light emitting direction of the light source. The second lens is configured to collimate and emit light rays emitted by the light source, and the third lens is configured to shape the light rays emitted by the second lens, so that light spots in a preset shape are formed. Compared with the prior art, the light rays emitted by the light source enter the second lens, the second lens collimates and emits the light rays, the third lens shapes the collimated light rays emitted by the second lens, and light spots in preset shapes can be projected out.

Description

TECHNICAL FIELD

[0001] The utility model relates to lighting technical field especially relates to a projection device, projection lighting system and lamps and lanterns. BACKGROUND

[0002] Sky lamp as a kind of unique lighting device, with its ability to simulate the effect of natural sky and be loved by consumers.Sky lamp is usually used in indoor environment, by specific light source and optical assembly, on the wall or ground projection is similar to the visual effect of real sky, make user as if in the natural environment with sunlight, improve the comfort of lighting.

[0003] Although traditional sky lamp is excellent in simulating the color level and brightness variation of sky, but there is obvious short board in simulating the light spot shape formed by sunlight through window.The traditional sky lamp can only project trapezoidal or rectangular light spot.In practical application, the shape of sky lamp is increasingly diversified, circular, oval and various special-shaped design emerge in endlessly.However, when using these sky lamps with different shapes to simulate the effect of sunlight through window, the light spot that is completely matched with the shape of sky lamp cannot be obtained, thereby affecting the reality and immersion of overall visual effect.

[0004] Therefore, it is necessary to provide a projection device, projection lighting system and lamps and lanterns to solve the above problems. INVENTION CONTENTS

[0005] The utility model aims at providing a projection device, projection lighting system and lamps and lanterns, can project the light spot of required shape.

[0006] To achieve the above object, the technical scheme of the utility model provides a projection device, comprising:

[0007] Light source module, including light source;

[0008] Optical module, it is opposite to light source module, including the second lens and third lens arranged in the light emitting direction of light source in proper order, the second lens is configured to collimate the light emitted by light source, the third lens is configured to shape the light emitted by the second lens, forms the light spot of preset shape.

[0009] Optionally, the optical module further includes a first lens arranged between the light source and the second lens, the side of the first lens away from the light source is a convex structure, to refract the light emitted by the light source, compress the light emitting angle of light.

[0010] Optionally, the first lens is made of silica gel or glass.

[0011] Optionally, the focal length of the second lens is f, and the distance between the second lens and the first lens is f±10mm.

[0012] Optionally, the second lens is a Fresnel lens, and the light exit surface of the Fresnel lens is a sawtooth structure.

[0013] Optionally, the third lens is a compound eye lens, and the compound eye lens comprises a base body and a plurality of sub-lenses arranged in an array on one side of the base body, and the cross-sectional shape of the sub-lenses in the horizontal direction is the same as the shape of the formed light spot.

[0014] To achieve the above object, the technical scheme of the utility model further provides a projection lighting system, including frame and preceding projection device, frame is equipped with reflection member in, to reflect the light ray that projects out of projection device, the side of frame that deviates from projection device is equipped with light outlet, for the light ray that reflects after reflection member shoots out, forms light spot on ground or wall surface.

[0015] Optionally, the projection device or the reflection member is configured to be rotatable to change the position of the light spot.

[0016] Optionally, the inner surface of the frame is black.

[0017] To achieve the above object, the technical scheme of the utility model further provides a lamp, including area light source lighting system and preceding projection lighting system, projection lighting system is assembled in the outside of area light source lighting system.

[0018] Compared with the prior art, the technical scheme of the embodiment of the utility model has the following beneficial effects:

[0019] The utility model discloses a light source emits light ray and carries out accurate control through optical module. First, the light ray that light source emits is shot into second lens, and the light ray that is shot into is collimated and shot out to simulate the parallel light ray that sun shoots out. Finally, the third lens is shaped to the light ray that is collimated and shot out through second lens, can project the light spot of preset shape, to meet the projection effect of different scenes and demand. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the installation schematic diagram of the lamp of the preferred embodiment of the utility model;

[0021] Figure 2 It is Figure 1 The structural schematic diagram of the lamp in it;

[0022] Figure 3 It is Figure 2 The structural schematic diagram of another angle in it;

[0023] Figure 4 It is Figure 2 The sectional view of the lamp in it;

[0024] Figure 5 is Figure 2 is an installation exploded view of the lamp;

[0025] Figure 6 is a visual effect diagram of the lamp simulating a blue sky according to the preferred embodiment of the present application;

[0026] Figure 7 is another visual effect diagram of the lamp simulating a blue sky according to the preferred embodiment of the present application;

[0027] Figure 8 is Figure 6 is a visual effect diagram of the surface light source lighting system and the side light emitting lighting system of the lamp simulating white light;

[0028] Figure 9 is Figure 6 is a visual effect diagram of the surface light source lighting system and the side light emitting lighting system of the lamp simulating colored light;

[0029] Figure 10 is a structural schematic diagram of the projection lighting system according to the preferred embodiment of the present application;

[0030] Figure 11 is Figure 10 is an optical path diagram of the projection lighting system;

[0031] Figure 12 is a structural schematic diagram of the projection device according to the preferred embodiment of the present application;

[0032] Figure 13 is Figure 12 is a structural schematic diagram of the second lens;

[0033] Figure 14 is Figure 12 is a structural schematic diagram of the third lens;

[0034] Figure 15 is a size relationship schematic diagram of the projection device, the reflecting member and the light outlet according to the preferred embodiment of the present application;

[0035] Figure 16 is a relationship schematic diagram of the installation distance of the lamp, the inclination degree of the projection device and the wall surface light spot size according to the preferred embodiment of the present application;

[0036] Figure 17 is an optical path diagram of the projection device according to the preferred embodiment of the present application;

[0037] Figure 18 is an optical path diagram of the third lens according to the preferred embodiment of the present application;

[0038] Figure 19 is a shape diagram of a reflecting member and a light spot according to an embodiment of the present application;

[0039] Figure 20 is a shape diagram of a reflecting member and a light spot according to another embodiment of the present application;

[0040] Figure 21 is a shape diagram of a reflecting member and a light spot according to a preferred embodiment of the present application;

[0041] Figure 22 is a light path diagram of rotating a projection device and a reflecting member in a projection lighting system according to an embodiment of the present application;

[0042] Figure 23 is Figure 22 is a structure diagram of moving a light spot position on a wall corresponding to different inclination angles of a projection device according to an embodiment of the present application;

[0043] Figure 24 is Figure 22 is a structure diagram of moving a light spot position on a wall corresponding to different rotating angles of a reflecting member according to an embodiment of the present application;

[0044] Figure 25 is Figure 22 is a structure diagram of moving a light spot position on a wall corresponding to different rotating angles of a projection device and a reflecting member according to an embodiment of the present application.

[0045] Reference signs:

[0046] Frame 1, projection device 2, housing 21, light source module 22, light source 221, light source plate 222, optical module 23, first lens 231, second lens 232, sawtooth structure 2321, third lens 233, base 2331, sub-lens 2332, reflecting member 3, first end 31, second end 32, light outlet 4, light blocking piece 5, light spot 6, projection lighting system 100;

[0047] Area light source lighting system 200, main light source plate 201, first multi-color lamp bead 2011, diffusion plate 202, transparent plate 203, main light outlet surface 204;

[0048] Side light emitting lighting system 300, auxiliary light source plate 301, second multi-color lamp bead 3011, side light outlet surface 302, virtual image 303;

[0049] Lamp 400, lamp housing 401, top wall 4011, frame 4012. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be described in detail below with reference to the drawings and specific embodiments.

[0051] It should be noted that, in order to avoid unnecessary details from obscuring the present application, only structures and / or processing steps closely related to the present application are shown in the drawings, and other details not closely related to the present application are omitted.

[0052] In addition, it should be noted that the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device.

[0053] Referring to Figures 1 to 25 As shown in the drawings, the embodiment of the present application provides a lamp 400. The lamp 400 includes a projection lighting system 100, a surface light source lighting system 200 and a side light emitting lighting system 300. The surface light source lighting system 200 is configured to simulate sunlight at different times in nature, similar to the sky, and can realize various scenes such as blue sky, white clouds and rainbow. The side light emitting lighting system 300 is arranged outside the surface light source lighting system 200, and the side light emitting lighting system 300 is configured to simulate the effect of sunlight shining on the edge of the skylight. In addition, the side light emitting lighting system 300 can also form a virtual image 303 in the surface light source lighting system 200. The projection lighting system 100 is arranged at the side of the side light 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.

[0054] Referring to Figures 1 to 5 As shown in the drawings, the lamp 400 includes a lamp housing 401, and the lamp housing 401 includes a top wall 4011 arranged oppositely and a frame 4012 extending away from the top wall 4011. The top wall 4011 is mounted on a mounting base, and the installation of the lamp 400 is generally completed by fixing the top wall 4011 to the wall or ceiling.

[0055] The surface light source lighting system 200 is installed between the frame 4012 and the top wall 4011. The surface light source lighting system 200 comprises a main light source plate 201, a diffusion plate 202, a transparent plate 203 and a main light exit surface 204 arranged in sequence by height. The main light source plate 201 is installed on the top wall 4011, and a plurality of groups of first multi-color lamp beads 2011 are integrated on the main light source plate 201 to provide a multi-colored surface light source. Specifically, at least two groups of first multi-color lamp beads 2011 are integrated on the main light source plate 201, and the at least two groups of first multi-color lamp beads 2011 can emit light of at least two spectra. The at least two groups of first multi-color lamp beads 2011 are distributed alternately, and adjacent same groups of first multi-color lamp beads 2011 are distributed reversely. Different light effects can be achieved by the first multi-color lamp beads 2011 of different colors, and the alternately distributed different groups of first multi-color lamp beads 2011 and the reversely distributed same groups of first multi-color lamp beads 2011 make the light emitted by the surface light source lighting system 200 more uniform, can simulate the color of sunlight at different times, and achieve the dynamic effect of light. Through the layout and control of the plurality of groups of first multi-color lamp beads 2011 on the main light source plate 201, the surface light source lighting system 200 can accurately simulate and present a plurality of complex surface scenes, such as clouds and blue sky.

[0056] In some embodiments, the first multi-color lamp beads 2011 can emit light of the same color. In other embodiments, the diffusion plate 202 is installed on the side of the main light source plate 201 close to the frame 4012, and the two ends of the diffusion plate 202 abut against the frame 4012. Moreover, the diffusion plate 202 is located on the light exit route of the first multi-color lamp beads 2011, and is used to uniformly emit the light emitted by the first multi-color lamp beads 2011 and eliminate the grainy feeling of the light. Preferably, the diffusion plate 202 is provided with scattering particles (not shown), which are nanoscale titanium dioxide particles in this embodiment, so that part of the light emitted by the first multi-color lamp beads 2011 is Rayleigh scattered in the diffusion plate 202, and a blue color like the sky is presented on the main light exit surface 204, as shown in Figure 6 and Figure 7 .

[0057] The transparent plate 203 is arranged on the side of the diffusion plate 202 away from the first multi-color lamp beads 2011, and the side of the transparent plate 203 away from the diffusion plate 202 is a mirror surface. The light emitted by the side light source lighting system 300 is at least partially projected onto the transparent plate 203, is reflected by the transparent plate 203, and forms a virtual image 303 on the mirror surface to simulate the window shadow effect formed on the window when the side of the window is illuminated by sunlight, so that the human eye has a deep and transparent feeling.

[0058] The mirror surface of the transparent plate 203 has a reflectivity greater than a transmittance to light, so that the light from outside can be limited from entering the transparent plate 203 from the light emitting surface. Alternatively, the material of the transparent plate 203 can be an inorganic material, which can be quartz glass. The transparent plate 203 can also be made of an organic material, which can be organic glass or other polymer transparent material, and the present application does not limit this.

[0059] The side light emitting illumination system 300 is installed on the frame 4012 and surrounds the main light emitting surface 204 of the surface light source illumination system 200. The side light emitting illumination system 300 has a side light emitting surface 302 attached to the frame 4012 near the side of the main light emitting surface 204. The side light emitting illumination system 300 includes an auxiliary light source plate 301 and a diffusion cover (not shown). The auxiliary light source plate 301 is installed in the frame 4012, and the diffusion cover is installed on the side of the auxiliary light source plate 301 close to the side light emitting surface 302. A plurality of groups of second multi-color lamp beads 3011 are integrated on the auxiliary light source plate 301 for emitting multi-color light. The side light emitting illumination system 300 can simulate a window shadow similar to sunlight shining on the window edge through the second multi-color lamp beads 3011. The diffusion cover is located on the light emitting path of the second multi-color lamp beads 3011. The light emitted by the second multi-color lamp beads 3011 is emitted in a direction away from the frame 4012, and after being diffused by the diffusion cover, a color-variable window shadow is formed on the side light emitting surface 302.

[0060] In some embodiments, the side light emitting illumination system 300 can be installed on one side of the frame 4012, and a light shielding member (not shown) is arranged on the other side of the frame 4012. The side light emitting illumination system 300 further includes a non-light emitting surface (not shown) corresponding to the light shielding member, which is arranged away from the frame 4012, and a light / shadow transition area is formed between the non-light emitting surface and the side light emitting surface 302 to simulate the sunlight shining on one side of the window and forming a dark surface on the other side of the window when the sunlight shines from one side, so that the display effect is more realistic. The side light emitting surface 302 and the non-light emitting surface are connected in a ring shape, and together form a ring-shaped surface around the outer periphery of the main light emitting surface 204. The light / shadow transition area is located at the junction of the side light emitting surface 302 and the non-light emitting surface. The light / shadow transition area is a bright / dark boundary area between the side light emitting surface 302 and the non-light emitting surface, which can be a continuous area from bright to dark, or a clear boundary line.

[0061] As shown in Figure 8 In some embodiments, the first multi-color lamp beads 2011 and the second multi-color lamp beads 3011 both emit white light, and the diffusion plate 202 does not have 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 light emitting illumination system 300 is also white.

[0062] As shown in Figure 9In some embodiments, the first multi-color light bead 2011 and the second multi-color light bead 3011 both emit light of multiple colors, and the diffusion plate 202 is free of scattering particles, so that the light emitted by the main light-emitting surface 204 is colored light, and the window shadow generated by the side light-emitting lighting system 300 is also colored.

[0063] Referring to Figures 10 to 14 As shown, the projection lighting system 100 is assembled on the side light-emitting lighting system 300 and emits light towards one side of the side light-emitting lighting system 300. The projection lighting system 100 includes a frame 1 and a projection device 2, a reflecting member 3 and a light outlet 4 arranged in the frame 1. The projection device 2 is assembled on one side of the frame 1 and is arranged obliquely relative to the horizontal plane for emitting light. The reflecting member 3 is arranged on the inner side wall of the top of the frame 1 and is located in the light-emitting direction of the projection device 2 for reflecting the light emitted by the projection device 2. In this embodiment, the reflecting member 3 is a mirror. The light outlet 4 is arranged on the side wall of the frame 1 and is located on the side of the frame 1 away from the projection device 2, and the light outlet 4 is directed towards the side light-emitting lighting system 300. The projection lighting system 100 is used to simulate the light spot 6, i.e. the shadow of the sun, formed after the sunlight passes through the window. Specifically, the light emitted by the projection device 2 is reflected by the reflecting member 3 and then emitted from the light outlet 4 to form a light spot 6 on the ground or wall surface which matches the shape of the area light emitted by the area light-emitting lighting system 200. Moreover, the position of the light spot 6 and the formation position of the window shadow are located on the same side of the lamp 400.

[0064] In order to prevent the light emitted by the projection device 2 from being directly emitted from the light outlet 4 to form stray light on the light spot 6 and affect the clear cut-off line of the light spot 6, the projection lighting system 100 further includes a light-blocking member 5 arranged in the frame 1, which is located between the light outlet 4 and the projection device 2 and is configured to block the direct light of the projection device 2. The light-blocking plate is black and can absorb the direct light of the projection device 2, effectively avoiding the influence of stray light on the clarity of the light spot 6.

[0065] In some preferred embodiments, the light-blocking member 5 is located directly below the projection direction of the reflecting member 3 to maximize the proportion of the light emitted by the projection device 2 which is reflected by the light-blocking member 5 and then emitted from the light outlet 4. The light-blocking member 5 can effectively prevent direct light from being emitted from the light outlet 4, thereby playing a role of light cutting, filtering stray light beyond the set area and ensuring the clear cut-off line of the light spot 6.

[0066] The inner surface of the frame 1 tends to reflect light, producing stray light. Further, in order to prevent the stray light generated inside the frame 1 from being emitted from the light outlet 4, thereby affecting the clear cutoff line of the light spot 6, the inner surface of the frame 1 is black. Specifically: the frame 1 can be made of black material, or the inner surface of the frame 1 can be covered with a black light-absorbing film layer, or the inner surface of the frame 1 can be sprayed with a black coating (not shown), and the light-absorbing film layer / black coating does not cover the reflecting member 3, so as to ensure that the reflecting member 3 normally reflects light. The light-absorbing film layer / black coating absorbs the reflected light of the inner surface of the frame 1, so that only the light reflected by the reflecting member 3 can be emitted from the light outlet 4, effectively filtering stray light, so as to form a clear light spot 6 on the ground or wall, so that the light spot 6 has a more distinct and clear cutoff line.

[0067] Specifically, the projection device 2 includes a housing 21 and a light source module 22 assembled in 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, part of which is absorbed by the light-blocking piece 5; part of which is reflected by the reflecting member 3 to the light outlet 4.

[0068] The projection device 2 further includes an optical module 23 assembled in the housing 21, and the optical module 23 is arranged 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 in sequence in the light outlet direction of the light source module 22. The first lens 231 is assembled to the light source plate 222 and covers the outside of the light source 221, and the first lens 231 is configured to compress the light outlet angle of the light source module 22. The side of the first lens 231 away from the light source 221 (i.e. the light outlet surface) is a convex structure, which can refract the light emitted by the light source 221. The convex structure can be a hemispherical structure or an ellipsoidal structure, so that the light emitted by the light source 221 can be refracted twice through the light inlet surface and the light outlet surface of the first lens 231, achieving the purpose of compressing the light outlet angle of the light. That is, the light source 221 focuses the beam shaping through the first lens 231 to converge the light. Preferably, the light outlet angle of the light emitted by the light source 221 is often 105° to 135°, but the light outlet angle of the light emitted after the first lens 231 is 35° to 55°, effectively improving the utilization rate of the light, and more light can be emitted into the second lens 232.

[0069] In some embodiments, the light source 221 is a lamp bead. Since the lamp bead generates high heat when working, and the first lens 231 is close to the light source 221, the first lens 231 needs to have good temperature resistance. In order to meet this requirement, the first lens 231 is made of high-temperature-resistant materials such as silica gel or glass. In this way, the first lens 231 remains stable in a high-temperature working environment, ensuring the converging function of the first lens 231 and protecting the light-emitting angle of the light source 221.

[0070] Preferably, when the light source 221 is a high-power LED, the light source module 22 further comprises a heat sink (not shown) for rapid heat dissipation to ensure the normal work of the light source 221.

[0071] The second lens 232 is configured to collimate the light emitted by the first lens 231 to simulate parallel sunlight. In this embodiment, the second lens 232 is a Fresnel lens, and the light-emitting surface of the Fresnel lens is a sawtooth structure 2321, as shown in FIG. 2B. Figure 13 The light emitted by the first lens 231 enters the Fresnel lens and is collimated from the sawtooth structure 2321.

[0072] The sawtooth structure 2321 includes a plurality of arranged sawteeth. In some embodiments, the tooth height of each sawtooth is equal, the width of the sawtooth closer to the center of the light-emitting surface of the second lens 232 is larger, and the interval between the adjacent two sawteeth is also larger. Correspondingly, the width of the sawtooth closer to the end of the second lens 232 is smaller, and the interval between the adjacent two sawteeth is also smaller.

[0073] In other embodiments, the width of each sawtooth is equal, and the tooth height of the sawtooth closer to the center of the light-emitting surface is smaller. Correspondingly, the tooth height of the sawtooth closer to the end of the second lens 232 is larger.

[0074] Further, 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, and the distance between the second lens 232 and the first lens 231 is f±10mm.

[0075] In some preferred embodiments, the distance between the second lens 232 and the first lens 231 is f±7mm, which can minimize the loss of light in the transmission process and make the light compressed by the first lens 231 collimate from the second lens 232. That is, the light is emitted in the form of nearly parallel light, simulating the effect of sunlight. Because the distance between the sun and the earth is very far, the light irradiated to the ground is approximately parallel light.

[0076] In some preferred embodiments, the second lens 232 can be made of transparent optical materials such as PMMC, PC, and silica gel, without limitation.

[0077] The third lens 233 is used to shape the light emitted by the second lens 232, so as to form a light spot 6 with a preset shape. In order to ensure the visual effect, the shape of the light spot 6 needs to be adapted to the shape of the surface light source lighting system 200. In the present embodiment, the third lens 233 is a compound eye lens, which includes a base body 2331 and a plurality of sub-lenses 2332 arranged in an array on one side of the base body 2331, as shown in Figure 14 Each sub-lens 2332 can independently adjust the light, thereby achieving accurate control of the light as a whole. Moreover, the cross-sectional shape of the sub-lens 2332 in the horizontal direction is the same as the shape of the light spot 6 formed. This characteristic enables the third lens 233 to shape the light into various light spots 6 with preset shapes as needed, thereby meeting the needs of the surface light source lighting system 200 for different shapes of light spots 6. Therefore, by selecting a corresponding compound eye lens, a light spot 6 with a shape adapted to the surface light source lighting system 200 can be emitted. Preferably, 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. For example, the light spot 6 of the square lamp 400 is square, and the light spot 6 of the circular lamp 400 is circular.

[0078] Please refer to Figure 15 to explore the correlation between the size of the projection device 2, the size of the reflecting member 3, and the size of the light outlet 4. Define the height of the projection device 2 as H, the width of the projection device 2 as L, the height of the frame 1 as HH, the width of the frame 1 as LL, the width of the reflecting member 3 as LW, the angle of inclination of the projection device 2 relative to the horizontal plane as θ, i.e. the angle of inclination of the installation of the projection device 2 as θ, the light outlet angle of the compound eye lens as β, the shortest distance between the top surface of the frame 1 and the projection device 2 as a; on the extension line of a, the distance between the optical module 23 and the bottom surface of the frame 1 is c; a, b, and c are collinear on the same height line, the distance between a and c is b, and the sum of a, b, and c is the height inside the frame 1, the distance between the light rays emitted by the projection device 2 farthest from the bottom surface of the frame 1 and the parallel light axis of the light rays emitted by the projection device 2 farthest from the bottom surface of the frame 1 passing through the compound eye lens and the reflecting member 3 is δLL, the distance between the light rays emitted by the projection device 2 closest to the bottom surface of the frame 1 and the parallel light rays emitted by the projection device 2 closest to the bottom surface of the frame 1 passing through the compound eye lens and the reflecting member 3 is δLR, in actual application, δLR>δLL; the distance between the parallel light axis of the light rays emitted by the projection device 2 farthest from the bottom surface of the frame 1 and the parallel light axis of the light rays emitted by the projection device 2 closest to the bottom surface of the frame 1 passing through the reflecting member 3 is L1, the distance between the light blocking member 5 and the reflecting member 3 in height is H1; then:

[0079] c = H * cos θ;

[0080] b = L * sin θ;

[0081] a = H - b - c = H - L * sin θ - H * cos θ;

[0082] δLL = H - L * sin θ - H * cos θ * tan θ - tan θ - β;

[0083] L1 = L / cos θ;

[0084] δLR = H - H * cos θ * tan θ + β - tan θ;

[0085] Therefore, the width of the reflecting member 3 is: LW = δLL + L1 + δLR = H - L * sin θ - H * cos θ * tan θ - tan θ - β + L / cos θ + H - H * cos θ * tan θ + β - tan θ.

[0086] From the above formula, it can be seen that the width of the reflecting member 3 is only related to the height H of the frame 1, the width L of the projection device 2, the light-emitting angle β of the compound eye lens, and the inclination angle θ of the installation of the projection device 2.

[0087] H1 = LW / (sin (θ + β) / cos (θ + β) + sin (β - θ) / cos (β - θ));

[0088] 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 - H - L * sin θ - H * cos θ * tan θ - tan θ - β + L / cos θ + H - H * cos θ * tan θ + β - tan θ / (sin (θ + β) / cos (θ + β) + sin (β - θ) / cos (β - θ)).

[0089] Therefore, the height of the light barrier is only related to the height H of the frame 1, the width L of the projection device 2, the light-emitting angle β of the compound eye lens, and the inclination angle θ of the installation of the projection device 2.

[0090] In some embodiments, the height of the light barrier 5 can be lower than the height of the light-emitting port 4, and at this time, part of the stray light will be emitted from the light-emitting port 4, affecting the clarity of the light spot 6.

[0091] 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 defined light spot 6 on the ground or wall. Similarly, it can be obtained 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 projection device 2.

[0092] 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°.

[0093] 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.

[0094] Wa = W * cosγ; ①

[0095] Lb = La / cosγ; ②

[0096] Lc = Lb - 0.5 * W * sinγ; ③

[0097] Wa = L + 2 * Lc * tanβ; ④

[0098] By solving the equations ① - ④ simultaneously, it can be obtained that:

[0099] W * cosγ = L + 2 * La / cosγ - 0.5 * W * sinγ * tanβ; ⑤

[0100] γ = 90° - θ; ⑥

[0101] By solving the equations ⑤ - ⑥ simultaneously, it can be obtained that:

[0102] W * sinθ = L + 2 * La / sinθ - 0.5 * W * cosθ * tanβ; ⑦

[0103] Since L << La and L << W, L can be ignored, then:

[0104] W * sinθ = 2 * La / sinθ - 0.5 * W * cosθ * tanβ. ⑧

[0105] Formula ⑧ shows the relationship between the installation distance La, the light-emitting angle β of the compound eye lens, and the height W of the light spot 6 on the wall. Therefore, when designing and installing it, the above relational formula needs to be satisfied. Any two of the installation distance La, the light-emitting angle β of the compound eye lens, and the height W of the light spot 6 on the wall can be used to obtain the remaining unknown term to guide the installation. For example, the required installation distance La can be calculated based on the light-emitting angle β of the compound eye lens and the height W of the light spot 6 on the wall.

[0106] It can be seen from Formula ⑧ that: β = Atn((W * sinθ) / (2 * La / sinθ - 0.5 * W * cosθ)).

[0107] Please refer to Figure 17 As shown, define the angle of the light after passing through the compound eye lens as β. Given the width W of the required illuminated light spot 6, 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 obtained (it is approximately parallel light before passing through the compound eye lens).

[0108] Similarly, according to the installation conditions and the size requirements of the light spot 6, the angle in any direction of the light emitted by the projection device 2 after passing through the compound eye lens can be obtained. Please refer to Figure 16 As shown, where β is the angle of the light 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 incident angle and the exit angle of the light respectively. Therefore, according to Snell's theorem, [[ID=!5]]

[0109] n * sinu = n' * sinu'; <000!3>

[0110] u' = u + β;

[0111] From the above formula, it can be obtained that: n * sinu = n' * sin(u + β).

[0112] Given β, n, and n', u can be obtained. The surface shape of the sub-lens 2332 in the compound eye lens can be obtained through an iterative algorithm, and then the compound eye lens can be obtained by arranging them.

[0113] In some embodiments, the compound eye lens may not be provided, and the shape of the light spot 6 can be changed by changing the shape of the reflector 3. For example, when the projection device 2 forms a positively trapezoidal light spot 6, by assembling an inversely trapezoidal reflector 3, the shape of the light spot 6 can be adjusted from a positively trapezoid to a rectangle.

[0114] Please refer to Figure 19 As shown, when the projection of the reflector 3 on the horizontal plane is a rectangle, the light spot 6 projected by the projection illumination system 100 is an inversely trapezoid.

[0115] Please refer to 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.

[0116] 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.

[0117] 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.

[0118] 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 utility model. The parameters of the connecting rod driving structure can be arbitrarily modified by those skilled in the art according to different application scenarios.

[0119] 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.

[0120] 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.

[0121] In some embodiments, the reflecting member 3 is kept stationary, generally flat, the position of the spot 6 on the ground or wall is adjusted by rotating the projection device 2 and controlling the angle of the projection device 2 relative to the horizontal plane to be acute.

[0122] Referring to Fig. 2, the simulation results of the position of the wall spot 6 formed by the projection lighting system 100 are shown. As shown, when the angle of the projection device 2 relative to the horizontal plane is 70°, the wall spot 6 formed by the projection lighting system 100 is at the top of the wall. When the angle of the projection device 2 relative to the horizontal plane is 60°, the wall spot 6 formed by the projection lighting system 100 is at the middle of the wall. When the angle of the projection device 2 relative to the horizontal plane is 50°, the wall spot 6 formed by the projection lighting system 100 is at the bottom of the wall. According to the simulation results of the position of the wall spot 6, the height of the spot 6 formed by the projection device 2 on the wall is positively correlated with the angle of the projection device 2 relative to the horizontal plane. Similarly, when the projection device 2 forms the spot 6 on the ground, the distance between the spot 6 and the projection device 2 is negatively correlated with the angle of the projection device 2 relative to the horizontal plane. Figure 23 Referring to Fig. 2, the simulation results of the position of the wall spot 6 formed by the projection lighting system 100 are shown. As shown, when the angle of the projection device 2 relative to the horizontal plane is 70°, the wall spot 6 formed by the projection lighting system 100 is at the top of the wall. When the angle of the projection device 2 relative to the horizontal plane is 60°, the wall spot 6 formed by the projection lighting system 100 is at the middle of the wall. When the angle of the projection device 2 relative to the horizontal plane is 50°, the wall spot 6 formed by the projection lighting system 100 is at the bottom of the wall. According to the simulation results of the position of the wall spot 6, the height of the spot 6 formed by the projection device 2 on the wall is positively correlated with the angle of the projection device 2 relative to the horizontal plane. Similarly, when the projection device 2 forms the spot 6 on the ground, the distance between the spot 6 and the projection device 2 is negatively correlated with the angle of the projection device 2 relative to the horizontal plane.

[0123] Figure 23 Referring to Fig. 2, the simulation results of the position of the wall spot 6 formed by the projection lighting system 100 are shown. As shown, when the angle of the projection device 2 relative to the horizontal plane is 70°, the wall spot 6 formed by the projection lighting system 100 is at the top of the wall. When the angle of the projection device 2 relative to the horizontal plane is 60°, the wall spot 6 formed by the projection lighting system 100 is at the middle of the wall. When the angle of the projection device 2 relative to the horizontal plane is 50°, the wall spot 6 formed by the projection lighting system 100 is at the bottom of the wall. According to the simulation results of the position of the wall spot 6, the height of the spot 6 formed by the projection device 2 on the wall is positively correlated with the angle of the projection device 2 relative to the horizontal plane. Similarly, when the projection device 2 forms the spot 6 on the ground, the distance between the spot 6 and the projection device 2 is negatively correlated with the angle of the projection device 2 relative to the horizontal plane.

[0124] In some embodiments, the control system can automatically adjust the rotation angle of the reflecting member 3 or the projection device 2 according to the biological rhythm, thereby precisely controlling the position of the spot 6 and making the spot 6 generated by the projection lighting system 100 highly similar to the spot 6 generated by outdoor sunlight, so as to create a real and natural light environment experience for the user.

[0125] ​In some other embodiments, the user can also select the visual effect of the light spot 6 at different time through the program, and the control system drives the reflecting member 3 or the projection device 2 to rotate to the corresponding angle to project the light spot 6. In addition, the control system can also control the power of the light source module 22, so that the user can adjust the position or brightness of the light spot 6 according to personal preferences or needs to meet diversified use requirements. In this way, the user can enjoy the visual effect of the natural light spot 6 at different time in the room.

[0126] In some other embodiments, the projection device 2 keeps the same inclination angle, and the position of the light spot 6 on the ground or the wall is adjusted by rotating the reflecting member 3 through the driving device.

[0127] Preferably, the reflecting member 3 is rotated forward or backward around the center of the reflecting member 3 as the rotation axis, and the angle of the reflecting member 3 relative to the frame 1 is an acute angle. The distance between the reflecting member 3 and the top surface of the frame 1 is 20 mm. The reflecting member 3 includes a first end 31 close to the projection device 2 and a second end 32 close to the light outlet 4. When the reflecting member 3 is rotated forward relative to the frame 1, the first end 31 is lower than the second end 32, and when the reflecting member 3 is rotated backward relative to the frame 1, the second end 32 is lower than the first end 31.

[0128] Please refer to Figure 24 As shown in the figure, when the reflecting member 3 is placed flat, the wall light spot 6 formed by the projection lighting system 100 can be seen to be in the middle of the wall. When the reflecting member 3 is rotated forward by 5° relative to the frame 1, i.e. α = 5°, the wall light spot 6 formed by the projection lighting system 100 can be seen to be at the bottom of the wall. According to the simulation results of the position movement of the wall light spot 6, the height of the light spot 6 formed on the wall by the projection device 2 is negatively correlated with the angle of the reflecting member 3 rotated forward relative to the frame 1.

[0129] Please refer to Figure 24 As shown in the figure, when the reflecting member 3 is placed flat, the wall light spot 6 formed by the projection lighting system 100 can be seen to be in the middle of the wall. When the reflecting member 3 is rotated backward by 5° relative to the frame 1, i.e. α = -5°, the wall light spot 6 formed by the projection lighting system 100 can be seen to be at the top of the wall. According to the simulation results of the position movement of the wall light spot 6, the height of the light spot 6 formed on the wall by the projection device 2 is positively correlated with the angle of the reflecting member 3 rotated backward relative to the frame 1.

[0130] Please refer to Figure 24 As shown in the figure, the position of the light spot 6 on the ground or the wall is adjusted by rotating the reflecting member 3. From Figure 22As can be seen, the angle α gradually increases from a negative angle to a positive angle, and the wall light spot 6 moves downward. It is similar to the slow change of the sun from the morning to near noon. When α = -5°, the light spot 6 is similar to the light spot 6 irradiated by the sun at 7 o'clock in the morning; when α = 0°, the light spot 6 is similar to the light spot 6 irradiated by the sun at 9 o'clock in the morning; and when α = 5°, the light spot 6 is similar to the light spot 6 irradiated by the sun at 11 o'clock in the morning. Therefore, the position of the light spot 6 can be adjusted by rotating the reflector 3 to simulate the light spot 6 generated by natural light at different times. The lamp 400 is provided with a control system, which can control the rotation angle of the reflector 3 according to the biological rhythm to obtain the light spot 6 at the corresponding time.

[0131] In some embodiments, referring to Figure 25 As shown, the position of the light spot 6 on the ground or the wall is adjusted by simultaneously rotating the reflector 3 and the projection device 2. In this way, the required rotation angle range of the reflector 3 and the projection device 2 is small, thereby reducing the overall size of the projection device 2. From Figure 23 As can be seen, the light spot 6 simulates the slow change of the sun from the morning to near noon. When θ = 65° and α = -2.5°, the light spot 6 is similar to the light spot 6 irradiated by the sun at 7 o'clock in the morning; when θ = 62° and α = 1°, the light spot 6 is similar to the light spot 6 irradiated by the sun at 9 o'clock in the morning; and when θ = 55° and α = 2.5°, the light spot 6 is similar to the light spot 6 irradiated by the sun at 11 o'clock in the morning. As can be seen, when the angle of the projection device 2 relative to the horizontal plane becomes smaller and smaller, and the angle of the reflector 3 relative to the frame 1 becomes larger and larger, the height of the light spot 6 formed on the wall by the projection device 2 becomes lower and lower. 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 the ground after the sun passes through the window at different times. The lamp 400 is provided with a control system, which can control the rotation angle of the reflector 3 according to the biological rhythm to obtain the light spot 6 at the corresponding time.

[0132] In summary, the optical module 23 precisely regulates and controls the light emitted by the light source 221. First, the light emitted by the light source 221 enters the second lens 232. The second lens 232 collimates the incident light to simulate sunlight. Finally, the third lens 233 shapes the collimated light emitted by the second lens 232, which can project a light spot of a preset shape, thereby meeting the projection effect of different scenes and needs.

[0133] The above embodiments are only used to illustrate the technical solutions of the present application and not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application.

Claims

1. A projection device, characterized by The application relates to a projection device. The projection device comprises a light source module (22) and an optical module (23). The optical module (23) further comprises a first lens (231) arranged between the light source (221) and the second lens (232).

2. The projection apparatus according to claim 1, wherein The first lens (231) is made of silica gel or glass.

3. The projection apparatus according to claim 2, wherein The second lens (232) is a Fresnel lens, and the light exit surface of the Fresnel lens is a sawtooth structure (2321).

4. The projection apparatus according to claim 2, wherein The third lens (233) is a compound eye lens, which comprises a base body (2331) and a plurality of sub-lenses (2332) arranged in an array on one side of the base body (2331).

5. The projection apparatus according to claim 1, wherein The projection device (2) or the reflecting member (3) is configured to be rotatable so as to change the position of the light spot (6).

6. The projection apparatus according to claim 1, wherein The inner surface of the frame (1) is black.

7. A projection illumination system characterized in that, The projection device (2) or the reflecting member (3) is configured to be rotatable so as to change the position of the light spot (6).

8. The projection illumination system of claim 7, wherein The inner surface of the frame (1) is black.

9. The projection illumination system of claim 7, wherein The projection device (2) or the reflecting member (3) is configured to be rotatable so as to change the position of the light spot (6).

10. A luminaire characterized by, The inner surface of the frame (1) is black. The projection device (2) or the reflecting member (3) is configured to be rotatable so as to change the position of the light spot (6). The inner surface of the frame (1) is black. The projection device (2) or the reflecting member (3) is configured to be rotatable so as to change the position of the light spot (6). The inner surface of the frame (1) is black. The projection device (2) or the reflecting member (3) is configured to be rotatable so as to change the position of the light spot (6). The inner surface of the frame (1) is black. The projection device (2) or the reflecting member (3) is configured to be rotatable so as to change the position of the light spot (6). The inner surface of the frame (1) is black. The projection device (2) or the reflecting member (3) is configured to be rotatable so as to change the position of the light spot (6). The inner surface of the frame (1) is black. 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