Light control element and lamp
By designing microstructures and curved inclined sides on the prism plate, the problem of balancing anti-glare effect and light output efficiency was solved, achieving a lighting effect with high anti-glare effect and high light output.
Patent Information
- Application Number
- CN202423294236.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing prism plates are difficult to balance anti-glare effect and light emission efficiency in design. Traditional designs reduce light emission efficiency when pursuing anti-glare effect, and have poor anti-glare effect when focusing on light emission efficiency.
Design a light control element by forming multiple microstructures with the light-emitting surface recessed inward on the main body. The microstructures are provided with inclined sides, which perform total internal reflection or refraction of light at different incident angles. The element includes a curved surface design to optimize light distribution.
It achieves both high anti-glare effect and light output rate in a shallow concave structure, reduces light loss, and provides a uniform and soft lighting effect.
Smart Images
Figure CN223564059U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lighting technical field especially relates to a light control element and lamp. BACKGROUND
[0002] In the lighting technical field, the prism plate as an important optical element is widely used in various lamps and display devices to improve the light efficiency and anti-dazzle effect. However, the prism plate products on the market often face the technical problem that the anti-dazzle effect and light efficiency are difficult to balance in the design and manufacturing process.
[0003] Specifically, the traditional prism plate design usually adopts a deeper concave structure when pursuing better anti-dazzle effect. Although this design can effectively reduce glare and improve visual comfort, since the light will undergo more refraction and reflection when passing through the deeper concave structure, it will cause light loss and reduce light efficiency, thus also causing the problem of reduced light efficiency.
[0004] On the other hand, if the design of the prism plate focuses too much on light efficiency and adopts a shallower concave structure, although it can improve the light transmittance, the anti-dazzle effect will be greatly reduced. Such design is prone to produce glare in strong light environment, affecting the visual experience and comfort of the observer. SUMMARY
[0005] The utility model aims at providing a light control element and lamp that can balance low glare and high light efficiency.
[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model provides a light control element, which comprises: a body, the body comprises an incident light surface and an exit light surface arranged oppositely, and on the body, a plurality of microstructures are formed by being recessed inward from the exit light surface, the microstructure comprises a plurality of inclined side surfaces;
[0007] The inclined side surface is configured to totally reflect the incident light when the incident angle of the incident light irradiated to the incident light surface is greater than a preset angle, and to refract and emit the incident light when the incident angle of the incident light irradiated to the incident light surface is less than or equal to the preset angle.
[0008] Optionally, the inclined side surface is a curved surface, and the curved surface is curved away from the incident light surface from the exit light surface.
[0009] Optionally, each inclined side surface comprises an inner inclined surface facing the incident light surface, and when the incident angle of the incident light irradiated to the inner inclined surface is greater than or equal to 30° and less than or equal to 50°, the exit angle of the incident light after refraction by the microstructure is 40°-70°.
[0010] Optionally, each inclined side comprises an inner inclined surface facing the light-incident surface, when the incident angle of the incident light ray irradiated to the inner inclined surface is less than 30°, the light ray after refraction of the microstructure has an exit angle of 0°-45°.
[0011] Optionally, the microstructure is a central symmetric structure.
[0012] Optionally, the plurality of microstructures are arranged in an array, and adjacent microstructures are connected at a common side of the light-exit surface.
[0013] Optionally, the plurality of inclined sides of the same microstructure intersect at a vertex, the distance between the light-exit surface and the vertex is a first distance, the distance between the light-incident surface and the vertex is a second distance, and the ratio of the first distance to the second distance is less than 0.5.
[0014] Optionally, the depth of the inner recess of the microstructure is less than 0.45mm.
[0015] To achieve the above object, the utility model also provides a lamp, which comprises: a diffusion plate, a light source and the above-mentioned light control element, the light-incident surface of the light control element is attached to the diffusion plate, the light control element and the light source are arranged on the two sides of the diffusion plate respectively, and the light emitted by the light source is emitted after passing through the diffusion plate and the light control element in turn.
[0016] Optionally, the utility model also comprises: a reflector, the light source is located between the reflector and the diffusion plate, and the light emitted from the light control element is reflected to the light control element through the reflector.
[0017] Compared with the prior art, the technical scheme of the embodiment of the utility model has the following beneficial effects:
[0018] The light control element of the utility model forms a plurality of microstructures by recessing inward from the light-exit surface on the body, thereby achieving effective control of the light. By arranging a plurality of inclined sides on the microstructure, large-angle light can be totally reflected, and small-angle light can be refracted and emitted from the outer inclined surface, so as to improve the anti-dazzle effect and the light emission rate. In this way, the microstructure can be used to reflect incident light with an incident angle greater than a preset angle, thereby preventing the problem of glare caused by large-angle light emission. Light with an incident angle less than the preset angle will be refracted at the inner inclined surface and emitted from the outer inclined surface at a smaller angle; the light incident at a small angle is dispersed in a more uniform and controllable manner, thereby avoiding the problem of direct light or excessive concentration, reducing light loss, and improving the anti-dazzle effect and the light emission rate. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is a structure diagram of the light control element according to the preferred embodiment of the utility model;
[0020] Figure 2 is Figure 1 a structure diagram of the microstructure;
[0021] Figure 3 is Figure 2 is a structural schematic view from another angle in the figure;
[0022] Figure 4 is a schematic view of the propagation direction of light in the light control element;
[0023] Figure 5 is a structural schematic view of a lamp according to the preferred embodiment of the present application;
[0024] Figure 6 is Figure 5 is an exploded schematic view of the lamp.
[0025] The labels of the components in the drawings are as follows:
[0026] Body 1, light inlet surface 11, light outlet surface 12;
[0027] Microstructure 2, inclined side surface 21, inner inclined surface 211, outer inclined surface 212, vertex 22;
[0028] Light control element 100;
[0029] Diffusion plate 110, light source 120, reflecting element 130, frame 140, base plate 150;
[0030] Lamp 200. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be described in detail below with reference to the drawings and specific embodiments.
[0032] Here, it needs to be explained that, in order to avoid the present application being obscured by unnecessary details, only the structures and / or processing steps closely related to the scheme of the present application are shown in the drawings, and other details not closely related to the present application are omitted.
[0033] In addition, it also needs to be explained that the term “comprise”, “include” or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.
[0034] Please refer to Figures 1 to 6As shown, the embodiment of the utility model provides a light control element 100, comprising: a body 1. The body 1 comprises oppositely arranged light-incident surface 11 and light-emitting surface 12. On the body 1, a plurality of microstructures 2 are formed by recessing inward from the light-emitting surface 12. Each microstructure 2 comprises a plurality of inclined side surfaces 21, and each inclined side surface 21 comprises oppositely arranged inner inclined surface 211 and outer inclined surface 212. The inner inclined surface 211 faces the light-incident surface 11.
[0035] In some embodiments, the plurality of inclined side surfaces 21 surround to form a groove structure. The outer inclined surface 212 faces the groove structure. Part of the light rays incident from the light-incident surface 11 can be refracted on the light-emitting surface 12 after passing through the groove structure, so as to be emitted at a smaller angle. Therefore, the groove structure enables the light rays to be dispersed in a more uniform and controllable manner, improving the utilization rate of the light rays.
[0036] When the incident angle of the incident light rays irradiated to the light-incident surface 11 is greater than a preset angle, the inclined side surface 21 totally reflects the incident light rays; when the incident angle of the incident light rays irradiated to the light-incident surface 11 is less than or equal to the preset angle, the inclined side surface 21 refracts and emits the incident light rays. For example, when the incident angle of the incident light rays irradiated to the light-incident surface 11 is greater than 50° and less than 90°, the incident light rays totally reflect on the inner inclined surface 211 and gradually weaken inside the light control element 100 through multiple reflections, preventing the glare problem caused by large-angle light emission. When the incident angle of the incident light rays irradiated to the light-incident surface 11 is less than or equal to 50°, the incident light rays are refracted on the inner inclined surface 211 and emitted from the outer inclined surface 212, and the angle of refraction is reduced, so that the incident light rays are emitted at a smaller angle. Therefore, the light rays incident at a small angle are dispersed in a more uniform and controllable manner, avoiding the problems of direct light or excessive concentration, and improving the light uniformity and anti-glare effect.
[0037] In some embodiments, the microstructure is a recessed polygonal pyramid structure, and a plurality of inclined side surfaces 21 are arranged on the polygonal pyramid structure. Each inclined side surface 21 of the polygonal pyramid structure can reflect and refract light rays, so that the light control in multiple directions can be realized through the plurality of inclined side surfaces 21. Further, the number and angle of the inclined side surfaces 21 can be adjusted according to different application scenarios and requirements, so as to realize omnidirectional and multi-angle light control effect.
[0038] Please refer to Figures 2 to 4 As shown, in other embodiments, the microstructure 2 is a central symmetric structure, which can reduce the complexity of mold design, and reduce the processing difficulty and cost. The microstructure 2 is central symmetric to the center line passing through the outer inclined surface 212 and perpendicular to the plane of the light-emitting surface 12, so that the light rays are reflected or refracted uniformly, thereby reducing the scattering and loss of the light rays in the propagation process and improving the overall light utilization efficiency.
[0039] In some embodiments, the microstructure 2 is composed of four inclined sides 21, so that the light rays can be evenly dispersed to the four inclined sides 21 when passing through the microstructure 2, realizing multi-directional light control, avoiding the uneven light spot or light and shade alternating phenomenon that may exist in the traditional structure, thereby improving the lighting quality.
[0040] In other embodiments, the number of inclined sides 21 in the same microstructure 2 can be more than four even numbers, which is not limited here. For example, in some actual scenarios, the microstructure 2 can include six inclined sides 21, so that the light rays can be evenly dispersed to the six inclined sides 21 when passing through the microstructure 2, realizing multi-directional light control.
[0041] Please refer to Figure 1 and Figure 4 As shown in the figures, since the plurality of microstructures 2 are arranged in an array, the adjacent microstructures 2 are connected at the common edge of the light emitting surface 12. That is, the microstructures 2 are closely arranged on the light emitting surface 12 without gaps, and the entire light emitting surface 12 is effectively utilized, reducing the direct transmission loss and edge scattering of light. Therefore, the light entering from the light entering surface 11 can be reflected or refracted to the greatest extent after passing through the microstructure 2, thereby improving the utilization efficiency of the light.
[0042] Moreover, since the light entering the light entering surface 11 will inevitably be reflected or refracted after passing through the microstructure 2, the light that may have been emitted at a large angle is guided to a smaller range of light emitting angles. Therefore, the light can be sufficiently and uniformly dispersed after passing through the microstructure 2, providing a more uniform and soft lighting effect.
[0043] The traditional prism sheet design usually adopts a relatively deep concave structure to achieve better anti-glare effect. In order to ensure the anti-glare effect, the market generally sets the concave depth to 1 / 3 of the overall height of the prism sheet, and the depth is generally about 0.5mm. However, since the light will undergo more refraction and reflection when passing through the relatively deep concave structure, the light loss will occur, making it difficult to guarantee the light output rate.
[0044] In the preferred embodiment of the present application, the inclined side 21 of the microstructure 2 is a curved surface, which is curved away from the light entering surface 11 from the light emitting surface 12. Since the inclined side 21 is a curved surface, when the light is incident on the curved surface, it will be deflected and scattered to different degrees according to the shape and angle of the curved surface. Thus, a non-uniform light distribution is formed to effectively reduce direct light and glare, and the light is more finely dispersed and guided during propagation, realizing uniform distribution of light.
[0045] Therefore, the microstructure 2 adopts the curved surface design, so that the light can be deflected and scattered to different degrees when irradiating the inclined side surface 21, forming a non-uniform light distribution, effectively reducing direct light and glare, and effectively improving the anti-glare effect. Compared with the non-curved surface design, the curved surface design can achieve the anti-glare effect at a shallow height position without designing a very deep opening. If a non-curved surface design is adopted, a relatively deep opening needs to be designed to intercept the large-angle incident light at a shallow height position. However, the use of a relatively deep opening can easily cause total reflection of the small-angle light at a deep height position, thereby reducing the light efficiency. In the embodiment, the microstructure 2 adopts the curved surface design, which can intercept the large-angle incident light even with a relatively shallow concave structure, thereby achieving the interception of the large-angle incident light at a shallow height position, that is, the total reflection of the large-angle light to ensure sufficient anti-glare effect. At the same time, the curved surface design can refract and emit the small-angle light at a deep height position, so as to emit more light, which is beneficial to improve the light efficiency.
[0046] Referring to Figures 2 to 3 As shown in the figure, the inclined side surfaces 21 intersect at a vertex 22 in the groove, the distance between the light emitting surface 12 and the vertex 22 is a first distance, and the distance between the light entering surface 11 and the vertex 22 is a second distance. Moreover, since the microstructure 2 adopts the curved surface design, the ratio of the first distance to the second distance can be less than 0.5.
[0047] Specifically, when the overall thickness of the light control element 100 is 1.5 mm, the concave depth of the microstructure 2 is less than 0.45 mm in combination with the curved surface design. The curved surface design makes the light more diffused when emitted, effectively reducing the glare phenomenon. Moreover, since the concave depth of the microstructure is shallow, more light can be reflected, which is beneficial to improve the light efficiency.
[0048] In some embodiments, when the overall thickness of the light control element 100 is 1.5 mm, the concave depth of the microstructure 2 is 0.4 mm, and the groove structure with the curved surface design makes the anti-glare effect of the microstructure 2 in the utility model basically the same as that of the ordinary prism plate with a concave depth of 0.45 mm.
[0049] In other embodiments, when the overall thickness of the light control element 100 is 1.5 mm, the concave depth of the microstructure 2 can be finely adjusted to any one of the following optimized values: 0.44 mm, 0.43 mm, 0.42 mm, and 0.41 mm.
[0050] Figure 4 is a schematic diagram of the propagation direction of the incident light in the microstructure 2.
[0051] Referring to Figure 4As shown, since the plurality of microstructures 2 are formed by inwardly recessing from the light-out surface 12 on the body 1, the microstructures 2 include at least four inclined side surfaces 21, and the inclined side surfaces 21 are curved surfaces. Therefore, by arranging the microstructures 2, the light control element 100 can effectively control the light rays, and the direct emission of the large-angle incident light rays is suppressed, and the emission mode of the small-angle incident light rays is optimized. Thus, the light loss is reduced, and the uniformity of the light rays is enhanced.
[0052] The inclined side surface 21 is configured to totally reflect the incident light rays when the incident angle of the incident light rays irradiated to the light-in surface 11 is greater than a preset angle, and refract and emit the incident light rays when the incident angle of the incident light rays irradiated to the light-in surface 11 is less than or equal to the preset angle.
[0053] Specifically, when the incident angle of the incident light rays irradiated to the light-in surface 11 is greater than 50°, the incident light rays are totally reflected on the microstructure 2. When the incident angle of the incident light rays irradiated to the inner inclined surface 211 is greater than or equal to 30° and less than or equal to 50°, the emission angle of the incident light rays after refraction by the microstructure 2 is 40°-70°. When the incident angle of the incident light rays irradiated to the inner inclined surface 211 is less than 30°, the emission angle of the incident light rays after refraction by the microstructure 2 is 0°-45°. In this way, the light rays with different incident angles can be emitted within the expected angle range after passing through the microstructure 2, so that the light rays are dispersed at a small angle. The glare phenomenon is effectively avoided, and the incident light rays are effectively controlled.
[0054] Correspondingly, the embodiment of the utility model also provides a lamp, please refer to Figure 5 and Figure 6 .
[0055] The lamp 200 includes the light control element 100, the diffusion plate 110, the light source 120 and the bottom disc 150, and the light-in surface 11 of the light control element 100 can be attached to the diffusion plate 110. In other embodiments, the light control element 100 is spaced apart from the diffusion plate 110 and maintains a certain distance. The light source 120 is arranged in the bottom disc 150, and the light source 120 is arranged on the side of the diffusion plate 110 away from the light control element 100, and the light emitted by the light source 120 is sequentially emitted through the diffusion plate 110 and the light control element 100.
[0056] Specifically, the light source 120 is arranged on the light source plate (not shown), the light source plate is placed in the bottom disc 150, and the lower surface of the light source plate is attached to the bottom disc. The light control element 100 and the diffusion plate 110 are fixed on the upper frame 140, and the frame 140 is fixedly connected with the bottom disc 150.
[0057] In other embodiments, the light control element 100 and the diffusion plate 110 are installed in the bottom disc 150 and placed above the light source plate. The frame 140 is fixedly connected with the bottom disc 150.
[0058] Please refer to Figure 6 As shown, part of the light will be reflected from the inner inclined surface 211 out of the light control element 100. In order to further improve the utilization of light, a reflecting element 130 is arranged on the side of the light source 120 away from the diffusion plate 110, for capturing the light not fully utilized. That is, the light source 120 is located between the reflecting element 130 and the diffusion plate 110. The light emitted from the light control element 100 onto the reflecting element 130 will be reflected on the reflecting element 130. The reflecting element 130 emits the light into the light control element 100 again, reducing the waste of light and improving the light efficiency. The light reflected by the reflecting element 130 will reduce the light incidence angle, which helps the light to be refracted, reflected or scattered better inside the light control element 100, further improving the uniformity and light efficiency of the light. At the same time, reducing the light incidence angle also helps to reduce the light leakage phenomenon at the edge of the light control element.
[0059] In summary, the light control element 100 of the utility model can effectively control the light by forming a plurality of microstructures 2 on the body 1 inwardly recessed from the light emitting surface 12. By arranging a plurality of inclined side surfaces 21 on the microstructure 2, the light with a large angle can be totally reflected, and the light with a small angle can be refracted and emitted from the outer inclined surface 212. The microstructure 2 can reflect the incident light with an incidence angle greater than a preset angle, preventing the problem of glare caused by large-angle light emission. The light with an incidence angle less than the preset angle will be refracted on the inner inclined surface 211 and emitted from the outer inclined surface 212 at a smaller angle, so that the light incident at a small angle is dispersed in a more uniform and controllable manner, reducing light loss and avoiding the problem of direct light or excessive concentration, improving the uniformity and anti-glare effect. Compared with the prior art, the light control element 100 of the utility model suppresses the direct emission of large-angle incident light by arranging the microstructure 2, optimizes the emission mode of small-angle incident light, reduces light loss, and improves the light efficiency and anti-glare effect.
[0060] The above embodiments are only used to illustrate the technical solutions of the utility model and not to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the utility model.
Claims
1. A light control element, characterized by, Comprising: A body (1) comprising a light-incident surface (11) and a light-emitting surface (12) arranged oppositely, and a plurality of microstructures (2) formed by recessing inwardly from the light-emitting surface (12) on the body (1), the microstructures (2) comprising a plurality of inclined side surfaces (21); The inclined side surfaces (21) are configured to totally reflect incident light rays when the incident angle of the incident light rays irradiated onto the light-incident surface (11) is greater than a preset angle, and refract and emit the incident light rays when the incident angle of the incident light rays irradiated onto the light-incident surface (11) is less than or equal to the preset angle.
2. The light control element according to claim 1, characterized in that, The inclined side surfaces (21) are curved surfaces curved away from the light-incident surface (11) from the light-emitting surface (12).
3. The light control element according to claim 1, wherein Each of the inclined side surfaces (21) comprises an inner inclined surface (211) facing the light-incident surface (11), and when the incident angle of the incident light rays irradiated onto the inner inclined surface (211) is greater than or equal to 30° and less than or equal to 50°, the emission angle of the incident light rays after refraction by the microstructure (2) is 40°-70°.
4. The light control element according to claim 1, wherein Each of the inclined side surfaces (21) comprises an inner inclined surface (211) facing the light-incident surface (11), and when the incident angle of the incident light rays irradiated onto the inner inclined surface (211) is less than 30°, the emission angle of the incident light rays after refraction by the microstructure (2) is 0°-45°.
5. The light control element according to claim 1, wherein The microstructures (2) are center-symmetrical structures.
6. The light control element according to any one of claims 1 to 5, wherein The plurality of microstructures (2) are arranged in an array, and adjacent microstructures (2) are connected at a common edge of the light-emitting surface (12).
7. The light control element according to any one of claims 1 to 5, wherein The plurality of inclined side surfaces (21) of the same microstructure (2) intersect at a vertex (22), the distance between the light-emitting surface (12) and the vertex (22) is a first distance, the distance between the light-incident surface (11) and the vertex (22) is a second distance, and the ratio of the first distance to the second distance is less than 0.
5.
8. The light control element according to claim 6, characterized in that, The recess depth of the microstructure (2) is less than 0.45 mm.
9. A luminaire characterized by, Comprising: A diffusion plate (110), a light source (120), and a light control element (100) according to any one of claims 1-8, the light-incident surface (11) of the light control element (100) being arranged on the diffusion plate (110), the light control element (100) and the light source (120) being arranged on opposite sides of the diffusion plate (110), and the light emitted by the light source (120) being emitted after sequentially passing through the diffusion plate (110) and the light control element (100).
10. The luminaire of claim 9, wherein, Further comprising: A reflector (130), the light source (120) being located between the reflector (130) and the diffusion plate (110), and the light emitted by the light control element (100) being reflected by the reflector (130) to the light control element (100).