Simulated sky lighting device

Abstract

The utility model discloses a sky-simulating lighting device, which comprises a shell, a light-emitting device, a light-emitting device and a light-emitting device, wherein the bottom wall of the shell is provided with a shell bottom light-emitting port; the scattering plate is located at a light outlet in the bottom of the shell; the light-emitting part comprises a first light-emitting surface, generates a directional main light beam and is positioned in the shell; the top reflecting part is located between the light-emitting part and the light outlet in the bottom of the shell and is parallel to the top wall of the shell, and at least part of the main light beam is reflected and then emitted out of the shell through the scattering plate; the first shading partition plate comprises a first light transmitting opening and is located between the top reflecting part and the light emitting part; the second shading partition plate comprises a second light transmitting opening and is located between the first shading partition plate and the light outlet in the bottom of the shell. The first light-transmitting opening and the second light-transmitting opening are located on a light beam main shaft of the main light beam, and light spots formed by the main light beam on the bottom wall of the inner side of the shell can completely cover a light outlet in the bottom of the shell. According to the simulated sky lighting device provided by the invention, two simulation elements of the sun and the sky can be considered, and flaws in a simulated sky scene can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting, in particular to a sky simulating lighting device. Background Art

[0002] Rayleigh scattering is the scattering of an incident light beam by tiny particles whose radius is much smaller than the wavelength of light or other electromagnetic radiation (radius is less than one tenth of the wavelength). Rayleigh scattering occurs when light passes through transparent gases, liquids and solids, and its intensity is inversely proportional to the fourth power of the wavelength λ of the incident light. In visible light, blue-violet light has a shorter wavelength and is more prone to scattering. The reason why the sky and the ocean appear blue is because of the Rayleigh scattering phenomenon. Lighting devices made using the principle of Rayleigh scattering can be used to simulate sky lighting.

[0003] A common implementation scheme for existing simulated sky lighting products is to use an array LED (Light Emitting Diode) to obliquely illuminate a light-emitting window diffuser. When light passes through the window diffuser, Rayleigh scattering occurs, thereby presenting a blue sky scene. Only sky elements can be simulated alone. Moreover, since the light source array directly illuminates the window plate, there is a lot of stray light inside and will illuminate the inside of the lamp housing, thereby producing bright area defects that can be observed at the window diffuser, affecting the simulation effect. Therefore, a simulated sky lighting device is designed to overcome the above problems. Utility Model Content

[0004] The utility model aims to provide a simulated sky lighting device, which can achieve a simulated sky simulation effect taking into account both the sun and the sky, and the bright area defects and stray light inside the device are effectively controlled.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A housing, wherein a bottom wall of the housing is provided with a housing bottom light outlet;

[0007] A scattering plate, arranged at the light outlet at the bottom of the housing;

[0008] A light emitting element, comprising a first light emitting surface, for generating a directional main light beam, wherein the light emitting element is arranged inside the housing;

[0009] A top reflector, located between the light emitting element and the bottom light outlet of the housing, parallel to the top wall of the housing, wherein at least a portion of the main light beam is reflected by the top reflector and then emitted to the outside of the housing through the scattering plate;

[0010] A first light shielding baffle is provided with a first light-transmitting opening, arranged in the housing and located between the top reflective element and the light-emitting element;

[0011] A second light-shielding baffle is provided with a second light-transmitting opening, arranged in the housing, perpendicular to the top reflector, and located between the first light-shielding baffle and the light outlet at the bottom of the housing;

[0012] The first light-transmitting opening and the second light-transmitting opening are arranged on the main axis of the main light beam, allowing at least part of the light to pass through and form a shell bottom light spot on the inner bottom wall of the shell, and the shell bottom light spot completely covers the shell bottom light outlet.

[0013] In a possible design, the first light-shielding baffle and the second light-shielding baffle also include a light-transmitting port edge transition structure, which is a straight or bent sheet, or a long strip with a wedge-shaped thickness transition, and a combination of these three basic forms; the light-transmitting port edge transition structure is arranged at the edges of the first light-transmitting port and the second light-transmitting port, and when the main light beam passes through the first light-transmitting port and the second light-transmitting port, at least part of the light is blocked by the light-transmitting port edge transition structure.

[0014] In a possible design, the orthographic projection of the top reflector on the bottom wall of the housing has no overlapping portion with the bottom light outlet of the housing.

[0015] In a possible design, the top reflector is a front-coated reflector.

[0016] In a possible design, a lampshade-like component is further provided at the light outlet position at the bottom of the shell, and the lampshade-like component has an inclined inner wall, and the angle between the inclination angle of the inner wall and the normal direction of the light emitting surface of the scattering plate is between 30° and 70°; the lampshade-like component is arranged at the light outlet position at the bottom of the shell, and the main light beam transmitted through the scattering plate does not directly irradiate the inner wall of the lampshade-like component.

[0017] In a possible design, the light-emitting element further includes a slide structure, and the slide structure is detachably installed outside the first light-emitting surface.

[0018] In a possible design, a first reflector and a second reflector are included between the light-emitting component and the first light-shielding baffle. The first reflector and the second reflector are arranged relative to each other. The main light beam from the light-emitting component is incident on the first reflector at an angle and is reflected. The reflected light beam is incident on the second reflector at an angle. The main light beam reflected by the second reflector is incident on the scattering plate via the first light-transmitting port, the top reflector, and the second light-transmitting port and is emitted from the light outlet at the bottom of the shell.

[0019] In a possible design, the first reflector is a plane reflector or a curved reflector.

[0020] In a possible design, the second reflector is a plane reflector or a curved reflector.

[0021] In a possible design, the inner side of the shell also includes a bottom reflector; the bottom reflector is arranged between the light-emitting element and the second light-shielding baffle, parallel to the bottom wall of the shell, the main light beam obliquely illuminates the bottom reflector and is reflected, and the reflected light beam passes through the top reflector and the second light-transmitting port, is incident on the scattering plate and is emitted.

[0022] In the above technical solution, the utility model provides a simulated sky lighting device, which has the following beneficial effects:

[0023] 1. The utility model can realize a simulated sky effect including two elements of the sun and the sky.

[0024] 2. The utility model can effectively reduce stray light observed from the light-emitting surface of the scattering plate and bright area defects inside the device, thereby improving the simulation effect of simulating the sun sky scene. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0026] Figure 1 A schematic diagram of the optical path structure of a sky-simulating lighting device provided in one embodiment of the present application;

[0027] Figure 2 A schematic diagram of the structure of the first shading baffle and the second shading baffle of the simulated sky lighting device provided in one embodiment of the present application;

[0028] Figure 3 Schematic diagram of three basic styles and installation methods of the light-transmitting edge transition structure of the simulated sky lighting device provided in one embodiment of the present application;

[0029] Figure 4 A schematic diagram of the combination and installation method of three basic styles of the edge transition structure of the light-transmitting opening of the simulated sky lighting device provided in one embodiment of the present application;

[0030] Figure 5 A diagram showing the position relationship between the top reflector and the bottom light outlet of the shell of the simulated sky lighting device provided in one embodiment of the present application;

[0031] Figure 6 A schematic diagram and a cross-sectional diagram of the structure of a lampshade-shaped component of a sky-simulating lighting device provided in one embodiment of the present application;

[0032] Figure 7A schematic diagram of a partial structure of a light-emitting member having a slide structure installed in a sky-simulating lighting device provided in an embodiment of the present application;

[0033] Figure 8 A simulated sky lighting device provided in another embodiment of the present application includes a schematic diagram of a light path structure of a first reflector and a second reflector.

[0034] Fig. 9 A schematic diagram of the optical path structure of a simulated sky lighting device provided in yet another embodiment of the present application includes a bottom reflector.

[0035] Reference numerals:

[0036] 1. Shell; 2. Light-emitting element; 3. First light-shielding baffle; 4. Second light-shielding baffle; 5. Top reflector; 6. Scattering plate; 7. Transition structure at the edge of the light-transmitting port; 8. Lampshade-shaped component; 9. First reflector; 10. Second reflector; 11. Bottom reflector; 101. Light outlet at the bottom of the shell; 201. First light-emitting surface; 202. Slide structure; 203. Slide structure fixing cover; 205. Main light beam; 210. Virtual image of light-emitting element; 301. First light-transmitting port; 401. Second light-transmitting port Mouth; 701, straight sheet-shaped light-transmitting opening edge transition structure; 702, bent sheet-shaped light-transmitting opening edge transition structure; 703, wedge-shaped strip-shaped light-transmitting opening edge transition structure; 704, light-transmitting opening edge transition structure of a combination of a sheet and a wedge-shaped strip; 705, light-transmitting opening edge transition structure of a combination of a sheet and a bent sheet; 801, the first inner side wall of a lampshade-shaped component; 802, the second inner side wall of a lampshade-shaped component; 803, the third inner side wall of a lampshade-shaped component; 804, the fourth inner side wall of a lampshade-shaped component. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly defined and specifically defined. In the present application, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, it can also be a detachable connection, or it can be integrated; it can be directly connected, it can also be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the description of the embodiments of the present application, it needs to be understood that the orientation or position relationship indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0040] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0041] Figure 1 It is a schematic diagram of the optical path structure of a simulated sky lighting device provided in one embodiment of the present application.

[0042] like Figure 1 , Figure 2As shown, the simulated sky lighting device of this embodiment includes: a housing 1, a light emitting element 2, a first light shielding baffle 3, a second light shielding baffle 4, a top reflector 5, and a scattering plate 6. A light outlet 101 is provided on the bottom wall of the housing 1; the scattering plate 6 is arranged at the light outlet 101; the light emitting element 2 includes a first light outlet surface 201, which is used to generate a main light beam 205 and is arranged in the housing 1; the top reflector 5 is located between the light emitting element 2 and the light outlet 101 at the bottom of the housing, parallel to the top wall of the housing 1, and the main light beam 205 is at least partially reflected by the top reflector 5 and then emitted to the outside of the housing 1 through the scattering plate 6; the first light shielding baffle 3 is provided with a first light transmission port 301, which is arranged in the housing 1 The first light-transmitting port 301 and the second light-transmitting port 401 are arranged on the main axis of the main light beam 205, allowing at least part of the light to pass through and form a shell bottom light spot on the inner bottom wall of the shell 1, and the shell bottom light spot completely covers the shell bottom light outlet 101.

[0043] like Figure 1 , Figure 2 As shown, in this embodiment, the inner surface of the shell 1, the first shading baffle 3 and the second shading baffle 4 are all covered with light-absorbing material, and the absorption coefficient of the light-absorbing material in the visible light range is greater than 70%, preferably greater than 90%, and most preferably greater than 98%.

[0044] like Figure 1 , Figure 2 As shown, in this embodiment, after the main light beam 205 passes through the first light shielding baffle 3, part of the light is blocked, and the light passing through the first light transmission port 301 forms a top light spot at the top reflector 5, and the top light spot is completely located inside the reflection area of ​​the top reflector 5. The second light shielding baffle 4 is located below the top reflector 5, and can partially block the main light beam 205 for the second time, allowing at least part of the light to pass through the second light transmission port 401 and form a shell bottom light spot on the bottom wall of the shell 1, and the shell bottom light spot can completely cover the shell bottom light outlet 101.

[0045] like Figure 1 , Figure 2As shown, in this embodiment, the scattering plate 6 located at the light outlet 101 at the bottom of the shell is made of a transparent material such as PMMA, PS, PC, MS, PET, etc., and contains scattering particles inside. The particle size distribution range of the scattering particles is 5nm to 400nm, and the material can be titanium dioxide, silicon dioxide, zinc oxide, aluminum oxide, barium sulfate, etc. or a combination thereof. When the main light beam 205 irradiates the scattering plate 6, the scattering particles inside it will produce Rayleigh scattering of the light beam. The blue light with a shorter wavelength and a lower color temperature is more easily scattered and propagates inside the scattering plate 6, thereby making the scattering plate 6 appear blue, forming the simulated element of "sky"; due to the existence of the top reflector 5, the light-emitting element 2 can be observed at the position of the scattering plate 6 in the opposite direction of the main light beam 205, and appears as a virtual image 210 of the light-emitting element, forming the simulated element of "sun", thereby forming the simulated scene of "sky with sun"; observing from the position of the scattering plate 6 toward the inside of the shell 1, the part other than the virtual image 210 of the light-emitting element constitutes the simulated sky background, and the brightness of the simulated sky background can significantly affect the simulation effect of the simulated sun sky scene. Generally speaking, the lower the brightness of the simulated sky background, the fewer details that are easily recognizable inside the shell 1, the more uniform the simulated sky background is, and the better the overall effect is.

[0046] Preferably, the light spot at the bottom of the shell formed after the main light beam 205 passes through the first light-transmitting port 301 and the second light-transmitting port 401 can just cover the light outlet port 101 at the bottom of the shell; since the first light-transmitting port 301 and the second light-transmitting port 401 are both located on the main axis of the main light beam 205, the opening area and position to be set are determined by the area of ​​the light outlet port 101 at the bottom of the shell, the position of the light-emitting element 2, and its own position in the shell 1; that is, by setting the first light-shielding baffle 3 and the second light-shielding baffle 4, most of the excess light in the main light beam 205 that is not directly used to irradiate the scattering plate 6 is blocked; the excess light in the main light beam 205 that is not directly used to irradiate the scattering plate 6 and the diffusely reflected light inside the shell 1 are collectively referred to as stray light; through the above settings, the brightness increase inside the shell 1 caused by stray light is effectively reduced; when observing from the position of the scattering plate 6 to the inside of the shell 1, the setting of the first light-shielding baffle 3 and the second light-shielding baffle 4 effectively reduces the bright area inside the shell 1 and reduces the overall brightness inside the shell 1.

[0047] like Figure 1 , Figure 2 As shown, in the present embodiment, since the inner surface of the shell 1, the surfaces of the first light-shielding baffle 3 and the second light-shielding baffle 4 are all covered with light-absorbing materials, most of the light in the main light beam 205 that is blocked by the first light-shielding baffle 3 and the second light-shielding baffle 4 is directly absorbed, thereby further reducing the stray light inside the shell 1, thereby reducing the brightness of the simulated sky background observed from the position of the scattering plate 6 toward the inside of the shell.

[0048] It should be pointed out that, since the first light-shielding baffle 3 and the second light-shielding baffle 4 have a certain thickness, after the first light-transmitting opening 301 and the second light-transmitting opening 401 are respectively provided, there will be a light-shielding baffle light-transmitting opening cross section, and the light-shielding baffle light-transmitting opening cross section will form a bright area when irradiated by the main light beam 205, which constitutes one of the defects in the simulated sun sky scene; from the above content, it can be inferred that reducing the light-shielding baffle light-transmitting opening cross section area is a feasible method, and the defect will gradually decrease in area with the decrease of the thickness of the first light-shielding baffle 3 and the second light-shielding baffle 4 in the simulated sun sky scene, and then become difficult to detect. In some application examples, for example, the longest side of the light outlet 101 at the bottom of the shell is less than 600 mm, and the first light-shielding baffle 3 and the second light-shielding baffle 4 can be made of metal plates with a thickness of less than 0.5 mm, and the thickness is better less than 0.3 mm.

[0049] like Figure 1 , Figure 2 As shown, in this embodiment, when the scattering plate 6 is irradiated by the main light beam 205, the internal scattering particles will Rayleigh scatter the light. The Rayleigh scattering phenomenon can not only make the scattering plate 6 appear blue, but also because part of the light is scattered and propagates inside the scattering plate 6, this will increase the brightness of the scattering plate 6 itself; when observing from the position of the scattering plate 6 to the inside of the shell 1, the brightness of the simulated sky background except for the virtual image 210 of the light-emitting element is lower than the brightness of the scattering plate 6 itself; the bright area defects inside the shell 1 can be reduced but difficult to completely eliminate, such as the bright area formed when the cross section of the first light-transmitting port 301 and the cross section of the second light-transmitting port 401 are irradiated by the main light beam 205. Under the combined effect of reducing the thickness of the first light-shielding baffle 3 and the second light-shielding baffle 4 and covering the surface with light-absorbing materials, the area and brightness of the bright area defects formed in the simulated sky background are effectively controlled. When observing from the scattering plate 6 which has a certain brightness to the inside of the shell 1, these bright area defects will be difficult to detect, thereby improving the overall simulation effect of simulating the sun sky scene.

[0050] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, in the present embodiment, the light-transmitting port edge transition structure 7 is arranged at the edge position of the first light-transmitting port 301 and the second light-transmitting port 401. The structure is a straight sheet 701 or a bent sheet 702, or a strip 703 with a wedge-shaped thickness transition, and a combination of these three basic forms, such as a light-transmitting port edge transition structure 704 composed of a sheet and a wedge-shaped strip, a light-transmitting port edge transition structure 705 composed of a sheet and a bent sheet, etc.; when the main light beam 205 passes through the first partition light-transmitting port 301 and the second light-transmitting port 401, at least part of the light is blocked by the light-transmitting port edge transition structure 7.

[0051] It should be pointed out that in some applications, for example, the longest side of the light outlet 101 at the bottom of the shell is more than 600 mm. In order to maintain the stability of the shape of the first light-shielding baffle 3 and the second light-shielding baffle 4, its thickness is difficult to be below a certain value, such as 1 mm; when the first light-shielding baffle 3 and the second light-shielding baffle 4 are made of lightweight materials such as wood boards, PVC foam boards or composite boards, this value is even more than 10 mm. At this time, due to the increase in the thickness of the board, when the main light beam 205 passes through, the cross-sectional reflective area of ​​the light-transmitting port 301 and the cross-sectional reflective area of ​​the light-transmitting port 401 increase, and the defect area of ​​the bright area in the simulated sky background increases, which will significantly affect the simulation effect of the simulated solar sky scene.

[0052] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, in this embodiment, the light-transmitting port edge transition structure 7 is arranged at the edge of the first light-transmitting port 301 and the second light-transmitting port 401 and extends to a certain length; the surface of the light-transmitting port edge transition structure 7 is covered with a light-absorbing material, and the absorption coefficient of the light-absorbing material in the visible light range is greater than 70%, preferably greater than 90%, and most preferably greater than 98%; the shape of the light-transmitting port edge transition structure 7 can be one of the three basic forms of a flat sheet 701, a bent sheet 702, and a strip 703 with a wedge-shaped transition in thickness, and the three basic forms can be combined to form a light-transmitting port edge transition structure such as a combination of a sheet and a wedge-shaped strip. 704, a light-transmitting port edge transition structure 705 composed of a sheet body and a bent sheet body, etc.; the common point of these forms is that after the light-transmitting port edge transition structure 7 is installed, when observing from the position of the scattering plate 6 toward the inside of the shell 1, the cross-section of the first light-transmitting port 301 and the cross-section of the second light-transmitting port 401 are both blocked by the light-transmitting port edge transition structure 7 installed at their respective positions, and the visible reflective surface of the light-transmitting port edge transition structure 7 is smaller when the main light beam 205 passes through, which effectively reduces the amount of reflection generated by the main light beam 205 when passing through the first light-transmitting port 301 and the second light-transmitting port 401; accordingly, the defects in the simulated sun sky scene are reduced and the simulation effect is improved.

[0053] like Figure 1 , Figure 5As shown, in this embodiment, the orthographic projection of the top reflector 5 on the bottom wall of the shell 1 has no overlapping part with the bottom light outlet of the shell. Specifically, when the scattering plate 6 located at the bottom light outlet 101 of the shell is irradiated by the main light beam 205, its own brightness will be improved; if the projection of the top reflector 5 perpendicular to the bottom surface of the shell overlaps with the bottom light outlet 101 of the shell, when observing from the position of the scattering plate 6 to the inside of the shell 1, the virtual image of the scattering plate 6 in the top reflector 5 can be directly observed, and this part of the virtual image will destroy the brightness uniformity of the simulated sky background, thereby affecting the simulation effect of the simulated sun sky scene; the projection of the top reflector 5 perpendicular to the bottom surface of the shell and the bottom light outlet 101 of the shell are set to be the shortest distance d>0, that is, there is no overlapping part between the two; when observing from the position of the scattering plate 6 to the inside of the shell 1, the virtual image of the scattering plate 6 located in the bottom light outlet 101 of the shell in the top reflector 5 cannot be directly observed, so no additional bright area is added, thereby maintaining a uniform low-brightness simulated sky background and improving the simulation effect of the simulated sun sky scene.

[0054] Furthermore, the main light beam 205 is reflected by the top reflector 5 and passes through the second light-transmitting port 401 to form a shell bottom light spot on the inner bottom wall of the shell 1, and the shell bottom light spot completely covers the shell bottom light outlet 101; although the shell 1 is coated with light-absorbing material, the shell bottom light spot area exceeds the shell bottom light outlet 101 and still forms a bright area. To ensure that the virtual image of this bright area formed in the top reflector 5 cannot be observed from the scattering plate 6 toward the inside of the shell 1, the top reflector 5 and the second light-shielding baffle 4 can be adjusted so that the shell bottom light spot and the orthographic projection of the top reflector 5 on the bottom wall of the shell 1 have no cross-overlap; the above settings can further optimize the brightness uniformity of the simulated sky background and improve the simulation effect of the simulated solar sky scene.

[0055] like Figure 1 As shown, in this embodiment, the top reflector 5 is a front-coated reflector. This arrangement can make the virtual image 210 of the light-emitting element clearer.

[0056] like Figure 1 , Figure 6As shown, in the present embodiment, a lampshade-like component 8 is further provided at the position of the light outlet 101 at the bottom of the shell, and the lampshade-like component 8 has inclined inner walls, namely the first inner wall 801 of the lampshade-like component, the second inner wall 802 of the lampshade-like component, the third inner wall 803 of the lampshade-like component, and the fourth inner wall 804 of the lampshade-like component, and the angle between the inclination angle of the inner wall of the lampshade-like component 8 and the normal direction of the light emitting surface of the scattering plate 6 is between 30° and 70°; the lampshade-like component 8 is detachably installed at the light outlet 101 at the bottom of the shell, and the main light beam 205 transmitted by the scattering plate 6 does not directly irradiate the inner wall structure of the lampshade-like component 8. Preferably, the present embodiment is installed in the ceiling, and the ceiling is provided with an opening for placing the lampshade-like structure 8, and the lower surface of the lampshade-like structure 8 is arranged flush with the ceiling; the above arrangement enables, when observing from the lampshade-like component 8 toward the scattering plate 6 and the inside of the shell 1, visually, the first inner wall 801 of the lampshade-like component, the second inner wall 802 of the lampshade-like component, the third inner wall 803 of the lampshade-like component, and the fourth inner wall 804 of the lampshade-like component jointly form a perspective composition, so that the scattering plate 6, as a sky element in the simulated sky scene, has a visual height higher than its actual position; since the first inner wall 801 of the lampshade-like component, the second inner wall 802 of the lampshade-like component, the third inner wall 803 of the lampshade-like component, and the fourth inner wall 804 of the lampshade-like component are not directly exposed to the main light beam 205, it can be ensured that their brightness is uniform in the perspective composition, which will further reduce the visual clues used to locate the height of the simulated sky, thereby improving the simulation effect of the simulated solar sky scene.

[0057] like Figure 1 , Figure 7 As shown, in this embodiment, the light-emitting member 2 further includes a slide structure 202, which is detachably mounted on the outside of the first light-emitting surface 201, and is connected to the light-emitting member 2 using a slide structure fixing cover 203; a moon pattern can be selected as the content on the slide structure 202, and the brightness of the light-emitting member 2 is adjusted so that the illumination of the light spot formed by the light emitted from the device to the outside of the housing 1 is between 0.01 and 5 lux. At this time, when observing the inside of the housing 1 through the scattering plate 6, a virtual image of the moon pattern formed by the slide structure 202 in the top reflector 5 can be observed. This setting can be used to simulate a moonlit night scene.

[0058] Figure 8 A simulated sky lighting device provided in another embodiment of the present application includes a schematic diagram of the optical path structure of a first reflector 9 and a second reflector 10 .

[0059] like Figure 2 , Figure 8 As shown, relative to the aforementioned Figure 1-7In the embodiment shown, in this embodiment, a first reflector 9 and a second reflector 10 are further included between the light-emitting element 2 and the first light-shielding baffle 3. The first reflector 9 and the second reflector 10 are arranged opposite to each other. The main light beam 205 from the light-emitting element 2 is obliquely incident on the first reflector 9 and is reflected, and the reflected light beam is obliquely incident on the second reflector 10. The main light beam reflected by the second reflector 10 is incident on the scattering plate 6 via the first light-transmitting port 301, the top reflector 5, and the second light-transmitting port 401 and is emitted from the light outlet 101 at the bottom of the shell.

[0060] It should be pointed out that the imaging position of the virtual image 210 of the light-emitting component has an important influence on the simulation effect of the sun sky scene. Stereoscopic vision is the feeling that the distance and shape of objects can be distinguished by binocular observation, also known as depth vision or spatial vision. The human eye has the ability to perceive the depth of the acquired scene, and this depth perception ability mainly depends on the following functions of the human eye: binocular parallax, motion parallax, eye adaptation, and convergence; in addition to the above functions, human experience and psychological effects also have an impact on the depth perception ability of the scene, such as perspective, overlap, color difference, contrast difference, light and shadow, etc. In this embodiment, when the observer observes the virtual image 210 of the light-emitting component from the position of the scattering plate 6 toward the inside of the shell 1, the virtual image 210 of the light-emitting component can be positioned with the help of the above-mentioned depth perception ability.

[0061] The average distance between the earth and the sun is about 149.6 million kilometers. In a real clear sky environment, the sun is visually very far away for observers on the ground. If you want to achieve a more realistic sun-sky simulation effect, based on the principle of stereoscopic vision, you can start with two methods: the first is to use a light-emitting component with higher brightness, for example, the brightness of the first light-emitting surface 201 is greater than 1500000cd / m 2 , brightness greater than 3000000cd / m 2 Better, brightness greater than 5000000cd / m 2 Best; at this time, when observing the virtual image 210 of the light-emitting component with the eyes, obvious glare will be felt, which will make it difficult for the observer to focus both eyes on the virtual image 210 of the light-emitting component, thereby hindering the observer from using stereoscopic vision to determine the specific position of the virtual image 210 of the light-emitting component; this situation is consistent with actual experience, that is, it is difficult for the human eye to look directly at the sun, and the observer will think that the elements in the scene are consistent with the real sun and sky scene; the second is to make the distance between the virtual image 210 and the scattering plate 6 farther through the optical path design, and this setting can also obtain a more realistic simulation of the sun and sky scene effect.

[0062] like Figure 8As shown, in this embodiment, the first reflector 9, the second reflector 10 and the top reflector 5 reflect the main light beam 205 multiple times, and the light path is folded multiple times inside the shell 1. The above arrangement can effectively increase the distance from the virtual image 210 to the scattering plate 6; when observing the virtual image 210 of the light-emitting element from the position of the scattering plate 6 toward the inside of the shell 1, the virtual image 210, as a sun element in the simulated sun sky scene, is effectively increased in height, thereby making the simulated sun sky scene more realistic.

[0063] like Figure 8 As shown, in this embodiment, the first reflector 9 is a plane reflector or a curved reflector.

[0064] like Figure 8 As shown, in the present embodiment, when the first reflector 9 is a plane reflector, preferably, the first reflector 9 is a front-coated plane reflector; the virtual image formed by the light-emitting element 2 in the first reflector 9 is in a mirror-symmetrical relationship with the light-emitting element 2 itself. At this time, the first reflector 9 functions to fold the optical path of the device, increase the propagation path of the main light beam 205, increase the distance from the virtual image 210 to the scattering plate 6, increase the imaging height of the sun element, and improve the simulation effect of the simulated sun sky scene; at the same time, such a setting can also reduce the thickness of the shell 1, making the installation of the simulated sky lighting device more convenient.

[0065] like Figure 8 As shown, in this embodiment, when the first reflector 9 is a curved reflector, preferably, the first reflector is a concave spherical reflector, more preferably a concave parabolic reflector, and further more preferably a concave free-form surface reflector; the distance from the light-emitting element 2 to the first reflector 9 is set to be less than the focal length of the first reflector 9, and the imaging law of the first reflector 9 satisfies the concave mirror imaging formula.

[0066] The imaging formula of a concave mirror is 1 / u+1 / v=1 / f=2 / R, where u is the object distance, i.e. the distance from the object to the vertex of the concave mirror; v is the image distance, i.e. the distance from the image to the vertex of the concave mirror; f is the focal length of the concave mirror, and R is the radius of curvature of the concave mirror. The imaging law of a concave mirror is closely related to the relationship between the object distance u and the focal length f. Specifically:

[0067] When the object distance u is less than the focal length f, an erect and enlarged virtual image is formed.

[0068] When the focal length f < object distance u < twice the focal length f, an inverted and enlarged real image is formed.

[0069] When the object distance u = twice the focal length f, an inverted and equal real image is formed.

[0070] When the object distance u> twice the focal length f, an inverted and reduced real image is formed.

[0071] like Figure 8As shown, in this embodiment, the distance from the light emitting member 2 to the first reflector 9 is less than the focal length of the first reflector 9, that is, the object distance u<focal length f, and the light emitting member 2 forms an upright and enlarged virtual image. The image distance v is uf / (uf), and the closer the distance from the light emitting member 2 to the first reflector 9 is to the focal length of the first reflector 9, the farther the image distance of the virtual image formed by the light emitting member 2 in the first reflector 9; therefore, the above setting can be used to increase the imaging height of the virtual image 210, that is, the sun element in the simulated sun sky scene, and optimize the simulation effect of the simulated sun sky scene of this embodiment.

[0072] like Figure 8 As shown, in this embodiment, the second reflector 10 is a plane reflector or a curved reflector; preferably, the area and position of the second reflector 10 are adjusted so that when observed from the position of the scattering plate 6 in the direction opposite to the main light beam 205, the edge of the second reflector 10 is blocked by the opaque area of ​​the first shading partition 3 and cannot be observed.

[0073] like Figure 8 As shown, in this embodiment, when the second reflector 10 is a plane reflector, the function of the second reflector 10 is to fold the light path of the device again, so as to increase the propagation path of the main light beam 205, increase the distance from the virtual image 210 to the scattering plate 6, increase the imaging height of the sun element, and improve the simulation effect of the simulated sun sky scene. At the same time, such a setting can also reduce the thickness of the shell 1, making the installation of the simulated sky lighting device more convenient.

[0074] like Figure 8 As shown, in the present embodiment, it should be pointed out that the scattering plate 6 located at the light outlet 101 at the bottom of the shell is used as the observation window of the present device. When the first reflector 9 is a curved reflector, it will bring aberration to the virtual image 210. When the second reflector 10 is a curved reflector, it can be used to correct the aberration of the virtual image formed by the first reflector 9. At the same time, the light path can be folded, which can further improve the simulation effect of the simulated sun sky scene.

[0075] Fig. 9 A sky-simulating lighting device provided in yet another embodiment of the present application includes a schematic diagram of the optical path structure of a bottom reflector 11 .

[0076] like Figure 2 , Fig. 9 As shown, relative to the aforementioned Figure 1-7In the embodiment shown, in this embodiment, the inner side of the housing 1 also includes a bottom reflector 11; the bottom reflector 11 is arranged between the light emitting element 2 and the second light shielding baffle 4, parallel to the bottom wall of the housing 1; the main light beam 205 obliquely irradiates the bottom reflector 11 and is reflected, and the reflected light beam passes through the top reflector 5 and the second light transmission port 401 and is incident on the scattering plate 6 and emitted. The function of the bottom reflector 11 is to fold the optical path of the device, so as to increase the propagation path of the main light beam 205, increase the distance from the virtual image 210 to the scattering plate 6, increase the imaging height of the sun element, and improve the simulation effect of the simulated sun sky scene, which can be regarded as the aforementioned Figure 8 A simplified version of the embodiment shown.

[0077] like Figure 2 ,like Fig. 9 As shown, in the present embodiment, it should be pointed out that the relative positions of the bottom reflector 11 and the first light-shielding baffle 3 can be adjusted as required, that is, the bottom reflector 11 can be located between the first light-shielding baffle 3 and the second light-shielding baffle 4, or below the first light-shielding baffle 3, or between the light-emitting element 2 and the first light-shielding baffle 3.

[0078] Specifically, Figure 2 ,like Fig. 9 As shown, in this embodiment, when the bottom reflector 11 is located between the first shading baffle 3 and the second shading baffle 4, the position and area of ​​the reflector 11 are adjusted so that the light spot formed by the main light beam 205 passing through the first light-transmitting port 301 on the bottom wall of the shell 1 is completely located inside the reflection area of ​​the bottom reflector 11.

[0079] When the bottom reflector 11 is located below the first light-shielding baffle 3, the light spot formed on the bottom wall of the shell 1 by the main light beam 205 passing through the first light-transmitting port 301 is completely located inside the reflection area of ​​the bottom reflector 11, and when observing from the position of the scattering plate 6 in the direction opposite to the main light beam 205, the edge of the bottom reflector 11 located on the right side of the first light-shielding baffle 3 is blocked by the non-light-transmitting area of ​​the first light-shielding baffle 3 and cannot be observed.

[0080] When the bottom reflector 11 is located between the light emitting element 2 and the first shading baffle 3, the main light beam 205 directly illuminates the bottom reflector 11. When observed from the position of the scattering plate 6 in the direction opposite to the main light beam 205, the edge of the bottom reflector 11 is blocked by the opaque area of ​​the first shading baffle 3 and cannot be observed.

[0081] Observing from the position of the scattering plate 6 toward the inside of the shell 1, the above arrangement effectively controls the amount and brightness of stray light and defective bright areas introduced by adding the bottom reflector 11, maintains a uniform low-brightness simulated sky background, improves the imaging position of the sun element in the simulated sky, and optimizes the simulation effect of the simulated sun sky scene.

[0082] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A sky simulating lighting device, characterized in that: include: A housing, wherein a bottom wall of the housing is provided with a housing bottom light outlet; A scattering plate, arranged at the light outlet at the bottom of the housing; A light emitting element, comprising a first light emitting surface, for generating a directional main light beam, wherein the light emitting element is arranged inside the housing; A top reflector, located between the light emitting element and the bottom light outlet of the housing, parallel to the top wall of the housing, wherein at least a portion of the main light beam is reflected by the top reflector and then emitted to the outside of the housing through the scattering plate; A first light-shielding baffle, provided with a first light-transmitting opening, arranged in the housing and located between the top reflective element and the light-emitting element; A second light-shielding baffle is provided with a second light-transmitting opening, arranged in the housing, perpendicular to the top reflector, and located between the first light-shielding baffle and the light outlet at the bottom of the housing; The first light-transmitting opening and the second light-transmitting opening are arranged on the main axis of the main light beam, allowing at least part of the light to pass through and form a shell bottom light spot on the inner bottom wall of the shell, and the shell bottom light spot completely covers the shell bottom light outlet.

2. The sky simulating lighting device according to claim 1, characterized in that: The first light-shielding baffle and the second light-shielding baffle also include a light-transmitting port edge transition structure, which is a straight or bent sheet, or a long strip with a wedge-shaped thickness transition, or a combination of these three basic forms; the light-transmitting port edge transition structure is arranged at the edges of the first light-transmitting port and the second light-transmitting port, and when the main light beam passes through the first light-transmitting port and the second light-transmitting port, at least part of the light is blocked by the light-transmitting port edge transition structure.

3. The sky simulating lighting device according to claim 1, characterized in that: The orthographic projection of the top reflector on the bottom wall of the shell has no overlapping portion with the bottom light outlet of the shell.

4. The sky simulating lighting device according to claim 1, characterized in that: The top reflector is a front-coated reflector.

5. The sky simulating lighting device according to claim 1, characterized in that: A lampshade-like component is also provided at the light outlet position at the bottom of the shell, and the lampshade-like component has an inclined inner wall, and the angle between the inclination angle of the inner wall and the normal direction of the light emitting surface of the scattering plate is between 30° and 70°; the lampshade-like component is arranged at the light outlet position at the bottom of the shell, and the main light beam transmitted through the scattering plate does not directly irradiate the inner wall of the lampshade-like component.

6. The sky simulating lighting device according to claim 1, characterized in that: The light emitting member further comprises a slide structure, and the slide structure is detachably mounted outside the first light emitting surface.

7. The sky simulating lighting device according to claim 1, characterized in that: A first reflector and a second reflector are also included between the light-emitting component and the first light-shielding baffle. The first reflector and the second reflector are arranged opposite to each other. The main light beam from the light-emitting component is incident on the first reflector obliquely and is reflected. The reflected light beam is incident on the second reflector obliquely. The main light beam reflected by the second reflector is incident on the scattering plate via the first light-transmitting port, the top reflector, and the second light-transmitting port and is emitted from the light outlet at the bottom of the shell.

8. The sky simulating lighting device according to claim 7, characterized in that: The first reflector is a plane reflector or a curved reflector.

9. The sky simulating lighting device according to claim 7, characterized in that: The second reflector is a plane reflector or a curved reflector.

10. The sky simulating lighting device according to claim 1, characterized in that: The inner side of the shell also includes a bottom reflector; the bottom reflector is arranged between the light-emitting element and the second light-shielding partition, parallel to the bottom wall of the shell, the main light beam obliquely illuminates the bottom reflector and is reflected, and the reflected light beam passes through the top reflector and the second light-transmitting port, is incident on the scattering plate and is emitted.

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