Lighting device
By using a coating technology for light-diffusing components and diffusers in skylights, the problem of excessive thickness in skylights has been solved, achieving a thinner and more aesthetically pleasing lighting device while simulating the light and color effects of the sky.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- MIDEA INTELLIGENT LIGHTING & CONTROLS TECHNOLOGY CO LTD
- Filing Date
- 2023-09-28
- Publication Date
- 2026-07-14
Smart Images
Figure CN117108958B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of lighting technology, and more particularly to a lighting device. Background Technology
[0002] With social progress and improved living standards, people have increasingly higher demands for lighting fixtures. Against this backdrop, a new type of lighting fixture has emerged in the home and commercial lighting sectors: the sky light, also known as the blue sky lamp or blue-sky lamp, which can simulate the illumination of the sky. This type of sky-simulating lighting fixture primarily focuses on its ability to mimic the visual effects of the sky.
[0003] Existing skylights utilizing the Rayleigh scattering principle typically place the light source at an angle of 40° to 45° relative to the scattering plate. This allows the light emitted by the light source to be projected onto the scattering plate, which is made using the Rayleigh scattering effect, at a certain angle. In order to ensure that the light is evenly projected onto the Rayleigh scattering plate, the distance between the light source and the scattering plate is large, resulting in a relatively thick overall skylight, which is not friendly to mainstream installation environments. Summary of the Invention
[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this disclosure provides a lighting device.
[0005] The first aspect of this disclosure provides a lighting device, comprising:
[0006] A housing having a light outlet formed thereon;
[0007] A light source, disposed within the housing, is used to emit illumination light;
[0008] A light-uniforming component is disposed inside the housing and located in the transmission optical path of the illumination light, and is used to perform light-uniforming processing on the illumination light to form uniform light.
[0009] A scattering mirror is disposed at the light outlet. A coating layer is disposed on the scattering mirror. The uniform light is projected onto the scattering mirror and filtered by the coating layer to produce a first preset light color.
[0010] The thickness of the lighting device along the direction perpendicular to the diffuser is between 5 mm and 160 mm.
[0011] The lighting device disclosed herein includes a housing, a light source, a light-diffusing component, and a diffuser. The housing has a light outlet, the light source is disposed inside the housing and is used to emit lighting light. The lighting light is emitted outward through the light outlet. The light-diffusing component is disposed inside the housing and is located in the light transmission path of the lighting light. It is used to perform light-diffusing processing on the lighting light to form uniform light, so as to avoid uneven lighting in the lighting device and ensure the lighting effect. A diffuser is positioned at the light outlet and has a coating layer. The uniform light formed by the homogenizing process is projected onto the diffuser and filtered by the coating layer to produce a first preset light color. Specifically, the first preset light color can simulate the state of the sky, thus enabling the lighting device to simulate the sky. Compared to existing lighting devices using the Rayleigh scattering effect, the light source does not need to be tilted, nor does it require increasing the distance between the light source and the light-emitting surface to ensure uniform light output under tilted illumination. It only needs to ensure that the uniform light emitted by the light source, after being homogenized by the homogenizing component, can reach the diffuser. The coating layer on the diffuser then filters the light to produce a preset color, thus simulating the state of the sky. With this configuration, the thickness of the lighting device along the direction perpendicular to the diffuser can be set between 5mm and 160mm. The thinner thickness makes the lighting device more regular and aesthetically pleasing, facilitating installation and avoiding the problem of insufficient installation height.
[0012] In some embodiments, the thickness of the lighting device along the direction perpendicular to the diffuser is between 10 mm and 60 mm.
[0013] In some embodiments, the thickness of the lighting device along the direction perpendicular to the diffuser is between 20 mm and 40 mm.
[0014] In some embodiments, the scattering mirror has a first surface and a second surface disposed opposite to each other, the first surface being disposed closer to the light source and the second surface being disposed further away from the light source;
[0015] The coating layer is disposed on the first surface and is configured to have a higher transmittance for light in a first preset wavelength band than for light in other wavelength bands. When the light source is turned on, the uniform light is incident on the first surface and filtered out by the coating layer to produce the first preset light color. The first preset light color is emitted outward through the second surface.
[0016] In some embodiments, the coating layer is further configured to have a reflectivity for light of a second preset wavelength band greater than that for light of other wavelength bands. When the light source is turned off, external light enters the first surface and is reflected and cut off by the coating layer to form a second preset light color. The second preset light color is emitted outward through the second surface.
[0017] The first preset band and the second preset band are set separately.
[0018] In some embodiments, the side of the coating layer facing the second surface is formed as a smooth surface so that the scattering mirror presents a mirror-like visual effect when the light source is off.
[0019] In some embodiments, the light source is disposed at the bottom inner side of the housing, and the light source emits light to the diffuser in a direct-lit backlight manner;
[0020] The light-diffusing component includes a Fresnel lens, which is mounted on and attached to the light source. The illumination light emitted by the light source is diffused by the Fresnel lens and then emitted towards the diffuser.
[0021] In some embodiments, the light-equalizing component further includes a light-emitting plate, which is disposed at the light-emitting port and located on the side of the scattering mirror facing the light source, and the light-emitting plate is arranged parallel to the scattering mirror;
[0022] The light-emitting plate has a third surface and a fourth surface arranged opposite to each other. The third surface is positioned away from the scattering mirror, and the fourth surface is positioned towards the scattering mirror. Part of the illumination light emitted by the light source is incident on the third surface after passing through the Fresnel lens and exiting through the fourth surface. Part of the illumination light emitted by the light source is reflected by the third surface after passing through the Fresnel lens and onto the inner sidewall of the housing. After being reflected and / or scattered by the inner sidewall of the housing, it is incident on the third surface again.
[0023] In some embodiments, a scattering groove is provided on the inner sidewall of the housing. The scattering groove is stepped. Part of the illumination light emitted by the light source is reflected by the third surface after passing through the Fresnel lens and onto the scattering groove. After being scattered by the scattering groove, it is incident on the third surface again at multiple angles.
[0024] In some embodiments, the light source includes a lamp panel and light-emitting elements dispersed on the lamp panel;
[0025] The ratio of the distance between two adjacent light-emitting elements to the distance between the light-emitting element and the light-emitting plate is within a preset ratio range, and the optical density value of the Fresnel lens is between 20 and 25.
[0026] In some embodiments, the housing includes an outer shell and a mounting bracket, the outer shell being formed as a housing structure with one end open, the opening of the outer shell forming the light outlet, and the mounting bracket being fixed to the opening of the outer shell;
[0027] The light source is located at the bottom inner side of the housing, and the diffuser is fixed on the mounting bracket.
[0028] In some embodiments, the light source is disposed on the inner side of the housing, and the light source emits light to the diffuser in a side-lit backlight manner;
[0029] The light-uniforming component includes a light guide and a reflector, wherein the light guide and the reflector are sequentially disposed on the side of the scattering mirror facing the light source;
[0030] The light source is positioned corresponding to the side of the light guide device, and the illumination light emitted by the light source is reflected by the light guide device and the reflector before exiting towards the diffuser.
[0031] In some embodiments, the light guide device has a fifth surface and a sixth surface disposed opposite to each other, the fifth surface being disposed away from the scattering mirror and the sixth surface being disposed towards the scattering mirror;
[0032] Part of the illumination light emitted by the light source is incident on the fifth surface via the side of the light guide device, and after being reflected by the fifth surface, it exits through the sixth surface. Part of the illumination light emitted by the light source is incident on the sixth surface via the side of the light guide device, and after being reflected by the sixth surface, it is reflected onto the reflector plate and exits through the sixth surface.
[0033] In some embodiments, the light-uniforming component further includes a light-emitting plate, which is disposed on the side of the scattering mirror facing the light guide device and is arranged parallel to the scattering mirror;
[0034] The light-emitting plate has a third surface and a fourth surface arranged opposite to each other. The third surface is arranged away from the diffuser, and the fourth surface is arranged towards the diffuser. The illumination light emitted by the light source is reflected by the light guide device and the reflector, then enters the third surface and exits through the fourth surface.
[0035] In some embodiments, the housing includes a back plate and a mounting bracket. The mounting bracket is disposed at the periphery of the back plate. The diffuser is disposed on the mounting bracket and is arranged parallel to the back plate. The reflector and the light guide are sequentially disposed between the back plate and the diffuser. The light source is fixed inside the mounting bracket and is disposed corresponding to the side of the light guide.
[0036] In some embodiments, the back plate, the reflector, the light guide device, the light emitting plate, and the diffuser are sequentially attached together. Attached Figure Description
[0037] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.
[0038] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0039] Figure 1 This is a schematic diagram of the structure of a lighting device according to an embodiment of the present invention;
[0040] Figure 2 This is a cross-sectional view of a lighting device according to an embodiment of the present invention;
[0041] Figure 3 This is a partial schematic diagram of a scattering groove according to an embodiment of the present invention;
[0042] Figure 4 This is a schematic diagram of the propagation path of illumination light according to an embodiment of the present invention;
[0043] Figure 5 This is a schematic diagram of the structure of a scattering mirror according to an embodiment of the present invention;
[0044] Figure 6 This is a schematic diagram of the structure of a light-emitting plate according to an embodiment of the present invention;
[0045] Figure 7 This is a schematic diagram of the structure of a lighting device according to another embodiment of the present invention;
[0046] Figure 8 This is a cross-sectional view of a lighting device according to another embodiment of the present invention.
[0047] In the diagram: 1. Housing; 11. Diffusion slot; 12. Outer shell; 13. Fixing frame; 14. Back plate; 2. Light source; 3. Light homogenizing component; 31. Fresnel lens; 32. Light emitting plate; 321. Third surface; 322. Fourth surface; 33. Light guide device; 331. Fifth surface; 332. Sixth surface; 34. Reflector; 4. Diffusion mirror; 41. First surface; 42. Second surface; 43. Coating layer; 5. Power supply. Detailed Implementation
[0048] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.
[0049] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.
[0050] The lighting device will be described in detail below through specific embodiments:
[0051] Reference Figures 1 to 8 As shown, some embodiments of the present invention provide a lighting device including a housing 1, a light source 2, a light-diffusing component 3, and a diffuser 4.
[0052] The housing 1 has a light outlet, the light source 2 is installed inside the housing 1 to emit illumination light, the illumination light is emitted outward through the light outlet, and the light homogenizing component 3 is installed inside the housing 1 and located on the light transmission path of the illumination light to homogenize the illumination light to form uniform light, so as to avoid uneven lighting in the lighting device and ensure the lighting effect.
[0053] The diffuser 4 is located at the light outlet and has a coating layer 43. The uniform light formed by the illumination light after the light homogenization process is projected onto the diffuser 4 and filtered by the coating layer 43 to produce a first preset light color. Specifically, the first preset light color can be a light color that can simulate the state of the sky, so that the lighting device can simulate the state of the sky. Compared with the existing lighting devices made using the Rayleigh scattering effect, the structure is simple and the lighting stability is higher.
[0054] Specifically, the thickness of the lighting device along the direction perpendicular to the diffuser 4 is between 5mm and 160mm. That is, the thickness of the lighting device along the direction perpendicular to the diffuser 4 is greater than or equal to 5mm and less than or equal to 160mm. This design avoids the problem of excessive thickness (greater than 160mm), which would require a large installation space and be unfriendly to mainstream installation environments, and also avoids excessive thickness (less than 5mm), which would impose stringent requirements on the thickness of each component and result in high manufacturing costs. In other words, the lighting device achieves both economic efficiency and a thin profile for easy installation. Furthermore, the thinner profile eliminates the need for an irregularly shaped, tilted housing 1, resulting in a more regular and aesthetically pleasing appearance and easier installation.
[0055] It should be noted that existing lighting fixtures using the Rayleigh scattering effect typically place the light source at an angle of 40° to 45° relative to the diffuser, so that the light emitted by the light source is projected onto the diffuser at a certain angle. Taking a horizontally placed diffuser as an example, with the light source positioned below the diffuser at a 40° to 45° angle, to ensure uniform projection of the light emitted by the light source onto the diffuser, the light source needs to be positioned within the vertical projection area of the diffuser, and there needs to be a significant distance between the light source and the diffuser both horizontally and vertically. This ensures that the light emitted by the light source is uniformly projected onto the diffuser along the angle. Lighting fixtures with this configuration are generally quite thick vertically, typically exceeding 160mm, and also relatively large horizontally, requiring significant installation space and being unfriendly to mainstream installation environments.
[0056] The lighting device provided in the above embodiments of this disclosure uses a diffuser 4 based on the principle of electroplating chemical color. That is, by setting a coating layer 43 on the diffuser 4, the lighting light emitted by the light source 2 can be filtered to a preset color. The light source does not need to be tilted, nor does it need to increase the distance between the light source and the light-emitting surface to ensure uniform light output under tilted lighting conditions. It is only necessary to ensure that the uniform light formed by the uniform processing of the lighting light emitted by the light source 2 after being uniformly processed by the light-uniforming component 3 can illuminate the diffuser 4. The coating layer 43 on the diffuser 4 can then filter the lighting light to a preset color, thereby simulating the state of the sky. With this setting, the thickness of the lighting device along the direction perpendicular to the diffuser 4 can be set to less than 160mm, thereby achieving the purpose of reducing the thickness of the lighting device. At the same time, considering the production cost, the thickness of the lighting device along the direction perpendicular to the diffuser 4 is set to more than 5mm. That is, the thickness of the lighting device along the direction perpendicular to the diffuser 4 is set between 5mm and 160mm. The thinner thickness of the lighting device makes the shape of the lighting device more regular and beautiful, facilitates installation, and avoids the problem of installation failure due to insufficient installation height.
[0057] Furthermore, considering the production cost and the need to reduce the thickness of the lighting device, the thickness of the lighting device along the direction perpendicular to the diffuser 4 is between 10mm and 60mm. That is, the thickness of the lighting device along the direction perpendicular to the diffuser 4 is greater than or equal to 10mm and less than or equal to 60mm.
[0058] Furthermore, the thickness of the lighting device along the direction perpendicular to the diffuser mirror 4 is between 20mm and 40mm. This design ensures that the lighting device is economical while maintaining a thin profile for easy installation.
[0059] In practical implementation, the thickness of the lighting device along the direction perpendicular to the diffuser mirror 4 can be 5mm, 10mm, 20mm, 30mm, 50mm, 60mm, 80mm, 100mm, 120mm, 140mm, 160mm, etc. Of course, the thickness of the lighting device is not limited to the above numerical range or specific values; it can be reasonably set according to actual needs. Furthermore, if production costs are not a concern, the thickness of the lighting device can be set below 5mm, for example, 4mm.
[0060] In some embodiments, refer to Figure 5 As shown, the diffuser 4 has a first surface 41 and a second surface 42 that are arranged opposite to each other. The first surface 41 is arranged close to the light source 2, and the second surface 42 is arranged away from the light source 2. The illumination light emitted by the light source 2 is incident on the first surface 41 and emitted outward through the second surface 42.
[0061] Specifically, the coating layer 43 is disposed on the first surface 41. The coating layer 43 is configured to have a higher transmittance for light in the first preset wavelength band than for light in other wavelength bands. When the light source 2 is turned on, uniform light is incident on the first surface 41 and filtered by the coating layer 43 to produce the first preset light color. The first preset light color is emitted outward through the second surface 42.
[0062] In other words, the transmittance of the coating layer 43 is set to increase abruptly in the first preset wavelength band and then level off in other wavelength bands. Compared to light in other wavelength bands, more light in the first preset wavelength band can pass through the coating layer 43 than light in other wavelength bands. This makes the exterior of the lighting device display the color corresponding to the light in the first preset wavelength band, i.e., the first preset light color is filtered out by the coating layer 43, and the first preset light color is emitted outward through the second surface 42, ultimately making the exterior of the lighting device display the first preset light color.
[0063] Specifically, the coating layer 43 is set with different first preset wavelengths, which enables the coating layer 43 to filter out different first preset light colors. Specifically, the first preset light color can be a light color that can simulate the state of the sky, so that the lighting device can simulate different sky states.
[0064] For example, the coating layer 43 is configured to have a higher transmittance for light in the 390nm-520nm wavelength band than for other wavelength bands. Specifically, the transmittance of the coating layer 43 increases abruptly in the 390nm-520nm wavelength band, while the trend is gradual in other wavelength bands. When the illumination emitted by the light source 2 is white light, the increased transmittance of the coating layer 43 in the 390nm-520nm wavelength band leads to increased blue light penetration. After passing through the coating layer 43, the white light emits a blue-green hue, resembling the illumination of a blue sky, corresponding to the violet-green color spectrum. The lighting device using this coating layer 43 emits a blue-green hue when the light source is on, thus mimicking the appearance of a sky.
[0065] Of course, the transmittance of the coating layer 43 to other preset wavelengths can be abruptly increased as needed to correspond to other hues of the color spectrum, so that the lighting device can simulate other colors of the sky, such as sunset or evening sunlight.
[0066] It should be noted that the lighting device provided in this embodiment uses the electroplating chemical color principle for the diffuser mirror 4. By setting a sudden increase in transmittance in a specific wavelength band, the white light emitted by the light source can be changed to sky blue or other preset colors, thereby simulating the state of the sky. This disclosure does not specifically limit the specific electroplating method for the coating layer 43, as long as it can achieve the above-mentioned functions.
[0067] Furthermore, the coating layer 43 is also configured to have a reflectivity for light in the second preset wavelength band greater than that for light in other wavelength bands. When the light source 2 is turned off, external light enters the first surface 41 and is reflected and cut off by the coating layer 43 to form the second preset light color. The second preset light color is emitted outward through the second surface 42.
[0068] In other words, the reflectivity of the coating layer 43 is set to increase abruptly in the second preset wavelength band and then level off in the other wavelength bands. Compared to light in other wavelength bands, more light in the second preset wavelength band is reflected by the coating layer 43 than light in other wavelength bands. This results in the lighting device displaying the color corresponding to the second preset wavelength band when the light source 2 is not turned on, i.e., the second preset light color reflected by the coating layer 43. In other words, when the light source 2 is turned off, external light is reflected by the coating layer 43 in the second preset light color. By setting different second preset wavelength bands, the coating layer 43 can display the second preset light color when the light source 2 is turned off. Specifically, the second preset light color can be a light color that simulates the state of the sky, allowing the lighting device to simulate the state of the sky even when the light source is not turned on.
[0069] For example, the coating layer 43 is configured to have a higher reflectivity for light in the 550nm-720nm wavelength band than for light in other wavelength bands. Specifically, the reflectivity of the coating layer 43 increases abruptly in the 550nm-720nm wavelength band, while the trend is gradual in other wavelength bands. When the light source 2 is not emitting light, external light reflected by the coating layer 43 appears golden yellow, corresponding to a red-orange-yellow color spectrum. Furthermore, in this state, when external light shines into the lighting device via the scattering mirror 4, the light is reflected and blocked by the scattering mirror 4. The lighting device using this coating layer 43 appears golden yellow when the light source is not lit, thus enabling the lighting device to simulate a sky state even when the light source is not turned on.
[0070] It should be noted that the first preset wavelength and the second preset wavelength are set differently, so that the first preset light color and the second preset light color are different. That is to say, all or some of the wavelengths other than the first preset wavelength are set as the second preset wavelength, so that the light of the first preset wavelength is filtered out by the coating layer 43, and the light of the second preset wavelength is reflected, so that the light source 2 presents different color effects when it is turned on and when it is turned off.
[0071] Specifically, the ranges of the first preset band and the second preset band can be set according to actual needs, and this disclosure does not limit this, as long as different sky conditions can be simulated. At the same time, the ranges of the first preset band and the second preset band can be designed with specific range values according to the color temperature of the light source 2, so that the diffuser 4 can be designed with a certain transmittance and reflectance.
[0072] In some embodiments, the coating layer 43 is formed as a smooth surface on the side facing the second surface 42, so that the diffuser 4 presents a mirror-like visual effect when the light source 2 is off. When the light source 2 is off, when external light shines into the interior of the lighting device through the diffuser 4, most of the light is reflected and blocked by the diffuser 4, making the exterior of the lighting device appear mirror-like. (Refer to...) Figure 5 As shown, light ray e from the outside is incident on the side of the coating layer 43 away from the light source 2, and after being reflected by the coating layer 43, light ray f is emitted outward, so as to present a mirror effect on the side of the coating layer 43 away from the light source 2.
[0073] Specifically, continue to refer to Figure 5 As shown, the diffuser 4 includes a diffuser body and a coating layer 43 disposed on the diffuser body. The coating layer 43 forms the first surface 41 of the diffuser 4. The illumination light emitted by the light source 2 is filtered by the diffuser 4 to produce a first preset light color. The material of the diffuser body is preferably tempered glass, but it can also be engineering plastics such as PMMA, PC, PS, PET, etc. This disclosure does not limit the material, as long as it can achieve light emission. Specifically, the coating layer 43 is formed by multiple coatings on the diffuser body, and the coating principle can adopt the electroplating chemical color principle.
[0074] In some embodiments, refer to Figures 1 to 6 As shown, the light source 2 is located at the bottom inside the housing 1, and the light source 2 emits light to the diffuser 4 using a direct backlight method.
[0075] Specifically, power is supplied to the lighting device via power supply 5. (See reference...) Figure 4 As shown, the light-diffusing component 3 includes a Fresnel lens 31, which is mounted on and attached to the light source 2. The illumination light emitted from the light source 2 is diffused by the Fresnel lens 31 and then emitted towards the diffuser mirror 4. It can be understood that the illumination light emitted from the light source 2 is directly emitted towards the diffuser mirror 4 after passing through the Fresnel lens 31. The Fresnel lens 31 expands the emission angle of the light source 2, ensuring that even when the diffuser mirror 4 is close to the light source 2, the illumination light can still cover the entire diffuser mirror 4. This maintains the luminous effect while reducing the thickness of the lighting device, facilitating installation. It should be noted that the light-diffusing component 3 is not limited to the Fresnel lens 31; any component that can expand the emission angle of the light source 2 and achieve the purpose of uniform light and reduced thickness is acceptable. This disclosure does not impose any limitations on this.
[0076] Furthermore, the light-diffusing component 3 also includes a light-emitting plate 32, which is disposed at the light-emitting port and located on the side of the diffuser 4 facing the light source 2. The light-emitting plate 32 is parallel to the diffuser 4. The illumination light emitted by the light source 2 is incident on the light-emitting plate 32 and emitted through the light-emitting plate 32 to the diffuser 4, and finally emits a first preset light color after passing through the diffuser 4. Specifically, the light-emitting plate 32 has a certain preset transmittance and a certain diffusion effect on the illumination light to soften the light.
[0077] Reference Figure 6 As shown, the light-emitting plate 32 has a third surface 321 and a fourth surface 322 arranged opposite to each other. The third surface 321 is positioned away from the diffuser 4, and the fourth surface 322 is positioned towards the diffuser 4. Part of the illumination light emitted by the light source 2 is incident on the third surface 321 after passing through the Fresnel lens 31 and exits through the fourth surface 322. Part of the illumination light emitted by the light source 2 is reflected by the third surface 321 after passing through the Fresnel lens 31 and onto the inner sidewall of the housing 1. After being reflected and / or scattered by the inner sidewall of the housing 1, it is incident on the third surface 321 again. It can be understood that after multiple reflections and refractions within the housing 12, the illumination light can be uniformly incident on the third surface 321 of the light-emitting plate 32 and provide uniform light to the diffuser 4, avoiding the problem of uneven illumination in the lighting device.
[0078] In a specific implementation, a scattering groove 11 is provided on the inner sidewall of the housing 1. The scattering groove 11 is stepped. Part of the illumination light emitted by the light source 2 is reflected by the third surface 321 after passing through the Fresnel lens 31, and then scattered by the scattering groove 11 before re-entering the third surface 321 at multiple angles. (Refer to...) Figure 4 As shown, the illumination light 'a' emitted by the light source 2 is incident on the third surface 321 at a certain angle. The light is split into two paths: one part, 'd', exits directly through the fourth surface 322, while the other part, 'b', is reflected onto the scattering groove 11 and then scattered by the scattering groove 11 to form light 'c'. Since the scattering groove 11 is stepped, light 'b' is scattered to form multiple light 'c's with different angles. After light 'c' is incident on the third surface 321, it can still exit through the fourth surface 322 or be reflected back into the housing 12 by the third surface 321 for further reflection and scattering. It can be understood that through multiple scattering and reflections, the illumination light can be evenly incident on the third surface 321 and filtered by the scattering mirror 4 to obtain the first preset light color, thereby providing a more uniform illumination color. It should be noted that light 'b' can also be incident on the inner bottom of the housing 12 and reflected by the inner bottom to the third surface 321 to achieve the purpose of uniform light color.
[0079] In some embodiments, the light source 2 includes a lamp panel and light-emitting elements dispersed on the lamp panel; the ratio of the distance between two adjacent light-emitting elements to the distance between the light-emitting elements and the light-emitting plate 32 is within a preset range. It is understood that in order to ensure that the illumination light can still cover the entire diffuser 4 even when the diffuser 4 is close to the light source 2, the number of light-emitting elements can be appropriately increased to prevent uneven brightness in the lighting device.
[0080] Considering economic factors, the thickness of the lighting device along the direction perpendicular to the diffuser 4 is between 5mm and 160mm. It should be noted that the thickness of the lighting device can also be less than 5mm, as long as the light-emitting elements and diffuser 4 can be reasonably arranged; this disclosure does not impose any limitations on this. In practical implementation, the thickness of the lighting device can be preset, and the number of light-emitting elements and the distance between them can be designed according to the thickness to ensure good lighting effect.
[0081] Furthermore, the optical density value of the Fresnel lens 31 is between 20 and 25, which ensures that the thickness of the lighting device along the direction perpendicular to the diffuser 4 is between 5mm and 160mm, and also ensures that the lighting light emitted by the light source 2 will not be excessively lost after passing through the Fresnel lens 31, thus ensuring the lighting effect of the lighting device.
[0082] In some embodiments, the housing 1 includes an outer shell 12 and a mounting bracket 13. The outer shell 12 is formed as an open-end structure, and the open end of the outer shell 12 forms a light outlet. The mounting bracket 13 is fixed to the open end of the outer shell 12. The light source 2 is disposed on the inner bottom of the outer shell 12, and the diffuser 4 is fixed to the mounting bracket 13. The illumination light emitted by the light source 2 is emitted from the inner bottom of the outer shell 12 toward the diffuser 4. The illumination light is filtered by the diffuser 4 to obtain a first preset light color. The first preset light color is emitted outward through the open structure on the outer shell 12, so that the lighting device presents the first preset light color.
[0083] It should be noted that the lighting device using the above embodiments of this disclosure employs a direct-lit backlight method, with a Fresnel lens 31 covering the light source 2, a stepped scattering groove 11 on the inner sidewall of the housing 12, and a light-emitting plate 32 on the side of the scattering mirror 4 facing the light source 2, thus achieving uniform projection of the illumination light emitted by the light source 2 onto the scattering mirror 4. Compared to existing solutions with tilted illumination, this reduces the problem of a larger distance between the light source and the light-transmitting plate required for uniform projection of the illumination light emitted by the light source onto the light-transmitting plate made using the Rayleigh scattering principle, resulting in a thicker overall lighting device. The lighting device of the above embodiments of this disclosure can achieve a thickness of less than 160mm, specifically, the thickness of the lighting device can be set within the range of 5mm to 160mm.
[0084] In other embodiments, reference is made to Figure 7 and Figure 8 As shown, the light source 2 is located on the inner side of the housing 1, and the light source 2 uses a side-lit backlighting method to emit light onto the diffuser 4. Specifically, the lighting device is powered by the power supply 5. (Refer to...) Figure 7 As shown, the light-diffusing component 3 includes a light guide device 33 and a reflector 34, which are sequentially arranged on the side of the diffuser 4 facing the light source 2.
[0085] In this design, the light source 2 is positioned correspondingly to the side of the light guide device 33. The illumination light emitted by the light source 2 is reflected by the light guide device 33 and the reflector 34 before exiting towards the diffuser mirror 4. It can be understood that by positioning the light source 2 on the side of the lighting device, the illumination light emitted by the light source 2 is reflected directly towards the diffuser mirror 4 after being reflected by the light guide device 33 and the reflector 34, eliminating the need for pre-reserved space for the light source 2 at the bottom of the housing 1, thus further reducing the thickness of the lighting device. Specifically, the back plate 14, the reflector 34, the light guide device 33, and the diffuser mirror 4 are sequentially attached, thereby reducing the thickness of the lighting device.
[0086] Reference Figure 8As shown, the light guide device 33 has a fifth surface 331 and a sixth surface 332 arranged opposite to each other. The fifth surface 331 is disposed away from the scattering mirror 4, and the sixth surface 332 is disposed towards the scattering mirror 4. Part of the illumination light emitted by the light source 2 is incident on the fifth surface 331 through the side of the light guide device 33 and reflected by the fifth surface 331 before exiting through the sixth surface 332. Part of the illumination light emitted by the light source 2 is incident on the sixth surface 332 through the side of the light guide device 33 and reflected by the sixth surface 332 onto the reflector 34. After being reflected by the reflector 34, it exits through the sixth surface 332.
[0087] It is understandable that the illumination light emitted by the light source 2 has multiple angles, and the illumination light from multiple angles can be evenly distributed on the fifth surface 331 and the sixth surface 332. The illumination light that shines on the fifth surface 331 is reflected and then emitted to the sixth surface 332. The illumination light that shines on the sixth surface 332 can be emitted directly to the diffuser 4, or it can be emitted to the diffuser 4 after multiple reflections, thereby achieving the purpose of uniform illumination light, avoiding the problem of uneven illumination in the lighting device, and improving the user experience.
[0088] Furthermore, the light-diffusing component 3 also includes a light-emitting plate 32, which is disposed on the side of the diffuser 4 facing the light guide device 33 and is arranged parallel to the diffuser 4. The illumination light reflected by the light guide device 33 and the reflector 34 enters the light-emitting plate 32 and exits through the light-emitting plate 32 towards the diffuser 4, finally emitting a first preset light color after passing through the diffuser 4. Specifically, the light-emitting plate 32 has a certain preset transmittance and a certain diffusion effect on the illumination light to soften the light and further homogenize the light.
[0089] In a specific implementation, the light-emitting plate 32 has a third surface 321 and a fourth surface 322 arranged opposite to each other. The third surface 321 is positioned away from the diffuser 4, and the fourth surface 322 is positioned towards the diffuser 4. The illumination light emitted by the light source 2 is reflected by the light guide device 33 and the reflector 34, then incident on the third surface 321 and exited through the fourth surface 322. It should be noted that the illumination light incident on the third surface 321 can also be reflected back to the light guide device 33 or the reflector 34, further homogenizing the light through multiple reflections and avoiding uneven illumination problems in the lighting device.
[0090] Reference Figure 7As shown, the housing 1 includes a back plate 14 and a mounting bracket 13. The mounting bracket 13 is located at the periphery of the back plate 14. A diffuser 4 is mounted on the mounting bracket 13 and arranged parallel to the back plate 14. A reflector 34 and a light guide 33 are sequentially arranged between the back plate 14 and the diffuser 4. A light source 2 is fixed inside the mounting bracket 13 and is correspondingly arranged on the side of the light guide 33. The illumination light emitted by the light source 2 enters the interior of the light guide 33, is evenly distributed within the light guide 33, and is reflected by the light guide 33 before exiting through the diffuser 4. The illumination light is filtered by the diffuser 4 to obtain a first preset light color and is then emitted outward, causing the lighting device to display the first preset light color to simulate the sky.
[0091] It is understandable that the back plate 14, reflector 34, light guide device 33, light emitting plate 32 and diffuser 4 are attached in sequence, thereby reducing the thickness of the lighting device and making it easier to install.
[0092] It should be noted that the lighting device provided in the above embodiments of this disclosure adopts a side-lit backlighting method, and a reflector 34, a light guide device 33, and a light-emitting plate 32 are arranged between the back plate 14 and the diffuser 4 to achieve uniform projection of the illumination light emitted by the light source 2 onto the diffuser 4. Compared with the existing scheme of tilted illumination by the light source, this can reduce the problem of a large distance between the light source and the light-transmitting plate required for uniform projection of the illumination light emitted by the light source onto the light-transmitting plate made of Rayleigh scattering principle, which leads to a thicker overall thickness of the lighting device. The lighting device of the above embodiments of this disclosure can achieve a thickness of less than 160mm, specifically, the thickness of the lighting device can be set in the range of 5mm to 160mm.
[0093] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.
[0094] The above are merely specific embodiments of this disclosure, enabling those skilled in the art to understand or implement this disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to these embodiments, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A lighting device, characterized in that, include: A housing having a light outlet formed thereon; A light source, disposed within the housing, is used to emit illumination light; A light-uniforming component is disposed inside the housing and located in the transmission optical path of the illumination light, and is used to perform light-uniforming processing on the illumination light to form uniform light. A scattering mirror is disposed at the light outlet. A coating layer is disposed on the scattering mirror. The uniform light is projected onto the scattering mirror and filtered by the coating layer to produce a first preset light color. The thickness of the lighting device along the direction perpendicular to the scattering mirror is between 5 mm and 160 mm. The scattering mirror has a first surface and a second surface arranged opposite to each other, the first surface being disposed closer to the light source and the second surface being disposed away from the light source, and the coating layer being disposed on the first surface; The coating layer is configured to have a higher reflectivity for light in the second preset wavelength band than for light in other wavelength bands. When the light source is turned off, external light enters the first surface and is reflected and cut off by the coating layer to form a second preset light color. The second preset light color is emitted outward through the second surface.
2. The lighting device according to claim 1, characterized in that, The thickness of the lighting device along the direction perpendicular to the diffuser is between 10 mm and 60 mm.
3. The lighting device according to claim 2, characterized in that, The thickness of the lighting device along the direction perpendicular to the diffuser is between 20 mm and 40 mm.
4. The lighting device according to claim 1, characterized in that, The coating layer is configured to have a higher transmittance for light in a first preset wavelength band than for light in other wavelength bands. When the light source is turned on, the uniform light is incident on the first surface and filtered by the coating layer to produce the first preset light color. The first preset light color is emitted outward through the second surface. The first preset wavelength band and the second preset wavelength band are staggered.
5. The lighting device according to claim 4, characterized in that, The coating layer is formed into a smooth surface on the side facing the second surface, so that the scattering mirror presents a mirror-like visual effect when the light source is off.
6. The lighting device according to any one of claims 1 to 5, characterized in that, The light source is located at the bottom inner side of the housing, and the light source emits light to the diffuser in a direct-lit backlight manner. The light-diffusing component includes a Fresnel lens, which is mounted on and attached to the light source. The illumination light emitted by the light source is diffused by the Fresnel lens and then emitted towards the diffuser.
7. The lighting device according to claim 6, characterized in that, The light-equalizing component further includes a light-emitting plate, which is disposed at the light-emitting port and located on the side of the scattering mirror facing the light source, and the light-emitting plate is arranged parallel to the scattering mirror; The light-emitting plate has a third surface and a fourth surface arranged opposite to each other. The third surface is positioned away from the scattering mirror, and the fourth surface is positioned towards the scattering mirror. Part of the illumination light emitted by the light source is incident on the third surface after passing through the Fresnel lens and exiting through the fourth surface. Part of the illumination light emitted by the light source is reflected by the third surface after passing through the Fresnel lens and onto the inner sidewall of the housing. After being reflected and / or scattered by the inner sidewall of the housing, it is incident on the third surface again.
8. The lighting device according to claim 7, characterized in that, A scattering groove is provided on the inner sidewall of the housing. The scattering groove is stepped. Part of the illumination light emitted by the light source is reflected by the third surface after passing through the Fresnel lens and onto the scattering groove. After being scattered by the scattering groove, it is incident on the third surface again at multiple angles.
9. The lighting device according to claim 7, characterized in that, The light source includes a lamp panel and light-emitting elements dispersed on the lamp panel; The ratio of the distance between two adjacent light-emitting elements to the distance between the light-emitting element and the light-emitting plate is within a preset ratio range, and the optical density value of the Fresnel lens is between 20 and 25.
10. The lighting device according to claim 6, characterized in that, The housing includes an outer shell and a fixing frame. The outer shell is formed as a shell structure with one end open, and the opening of the outer shell forms the light outlet. The fixing frame is fixed to the opening of the outer shell. The light source is located at the bottom inner side of the housing, and the diffuser is fixed on the mounting bracket.
11. The lighting device according to any one of claims 1 to 5, characterized in that, The light source is located on the inner side of the housing, and the light source emits light to the diffuser in a side-lit backlight manner. The light-uniforming component includes a light guide and a reflector, wherein the light guide and the reflector are sequentially disposed on the side of the scattering mirror facing the light source; The light source is positioned corresponding to the side of the light guide device, and the illumination light emitted by the light source is reflected by the light guide device and the reflector before exiting towards the diffuser.
12. The lighting device according to claim 11, characterized in that, The light guide device has a fifth surface and a sixth surface arranged opposite to each other, the fifth surface being disposed away from the scattering mirror, and the sixth surface being disposed towards the scattering mirror; Part of the illumination light emitted by the light source is incident on the fifth surface via the side of the light guide device, and after being reflected by the fifth surface, it exits through the sixth surface. Part of the illumination light emitted by the light source is incident on the sixth surface via the side of the light guide device, and after being reflected by the sixth surface, it is reflected onto the reflector plate and exits through the sixth surface.
13. The lighting device according to claim 11, characterized in that, The light-uniform component also includes a light-emitting plate, which is disposed on the side of the scattering mirror facing the light guide device and is arranged parallel to the scattering mirror; The light-emitting plate has a third surface and a fourth surface arranged opposite to each other. The third surface is arranged away from the diffuser, and the fourth surface is arranged towards the diffuser. The illumination light emitted by the light source is reflected by the light guide device and the reflector, then enters the third surface and exits through the fourth surface.
14. The lighting device according to claim 13, characterized in that, The housing includes a back plate and a mounting bracket. The mounting bracket is located at the periphery of the back plate. The diffuser is mounted on the mounting bracket and is arranged parallel to the back plate. The reflector and the light guide are sequentially arranged between the back plate and the diffuser. The light source is fixed inside the mounting bracket and is arranged corresponding to the side of the light guide.
15. The lighting device according to claim 14, characterized in that, The back plate, the reflector, the light guide, the light emitting plate, and the diffuser are sequentially attached and arranged.