Light control element and luminaire
By designing multiple microstructures and curved inclined sides on the prism plate, the problem of balancing anti-glare effect and light output efficiency was solved, achieving efficient anti-glare and uniform lighting effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SUZHOU YUNCHUANG SMART LIGHTING CO LTD
- Filing Date
- 2024-12-27
- Publication Date
- 2026-06-30
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.
A light-controlling element is designed by forming multiple microstructures on the body and tilting the side to perform total reflection or refraction of incident light. By designing the curved surface of the microstructures and arranging them in an array, the direction of light propagation can be controlled to improve the anti-glare effect and light output rate.
It effectively prevents glare in shallow concave structures, improves light utilization and uniformity, and enhances lighting quality and light output efficiency.
Smart Images
Figure CN122305425A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of lighting technology, and more particularly to a light control element and a lamp. Background Technology
[0002] In the field of lighting technology, prisms, as an important optical element, are widely used in various lamps and display devices to improve light emission efficiency and anti-glare effects. However, prism products on the market often face the technical challenge of balancing anti-glare performance with light emission efficiency during the design and manufacturing process.
[0003] Specifically, traditional prism plate designs typically employ a deep concave structure to achieve better anti-glare effects. While this design effectively reduces glare and improves visual comfort, it also leads to more refraction and reflection of light as it passes through the deep concave structure. This results in light loss and reduced light extraction efficiency, thus causing a decrease in light extraction efficiency.
[0004] On the other hand, if the prism plate design focuses too much on light emission efficiency and adopts a shallow concave structure, although it can improve light transmittance, the anti-glare effect will be greatly reduced. This design is prone to glare in strong light environments, affecting the observer's visual experience and comfort. Summary of the Invention
[0005] The purpose of this invention is to provide a light control element and lamp that can balance low glare and high light output efficiency.
[0006] To achieve the above objectives, the present invention provides a light control element, comprising: a body, the body including an incident light surface and an exit light surface disposed opposite to each other, and a plurality of microstructures formed inward from the exit light surface on the body, the microstructures including a plurality of inclined side surfaces;
[0007] The tilted side is configured such that when the incident angle of the incident light illuminating the incident light surface is greater than a preset angle, the incident light is totally internally reflected; when the incident angle of the incident light illuminating the incident light surface is less than or equal to the preset angle, the incident light is refracted and emitted.
[0008] Optionally, the inclined side is a curved surface, which curves from the light-emitting surface away from the light-receiving surface towards the light-receiving surface.
[0009] Optionally, each inclined side includes an inner inclined surface facing the incident surface. When the incident angle of the incident light illuminating 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° to 70°.
[0010] Optionally, each inclined side includes an inner inclined surface facing the incident surface. When the incident angle of the incident light illuminating the inner inclined surface is less than 30°, the exit angle of the incident light after refraction by the microstructure is 0° to 45°.
[0011] Optionally, the microstructure is a centrosymmetric structure.
[0012] Optionally, multiple microstructures are arranged in an array, with adjacent microstructures connected by a common edge on the light-emitting surface.
[0013] Optionally, several inclined sides of the same microstructure intersect at a vertex, the distance between the light-emitting surface and the vertex is the first distance, the distance between the light-incident surface and the vertex is the second distance, and the ratio of the first distance to the second distance is less than 0.5.
[0014] Optionally, the concave depth of the microstructure is less than 0.45 mm.
[0015] To achieve the above objectives, the present invention also provides a lamp, comprising: a diffuser plate, a light source, and the aforementioned light control element. The light incident surface of the light control element is attached to the diffuser plate, and the light control element and the light source are respectively disposed on both sides of the diffuser plate. The light emitted by the light source passes through the diffuser plate and the light control element in sequence before being emitted.
[0016] Optionally, it also includes: a reflector, with the light source located between the reflector and the diffuser, and the light emitted from the light-controlling element being reflected by the reflector to the light-controlling element.
[0017] Compared with the prior art, the technical solutions of the embodiments of the present invention have the following beneficial effects:
[0018] The light-controlling element of this invention achieves effective control of light by forming multiple microstructures recessed inward from the light-emitting surface on the main body. By setting several inclined sides on the microstructures, large-angle light can be totally internally reflected, and small-angle light can be refracted and emitted from the outer inclined surface, thereby improving the anti-glare effect and light extraction rate. In this way, the microstructures can reflect incident light with an incident angle greater than a preset angle, preventing glare problems caused by large-angle light emission. Light with an incident angle less than the preset angle is refracted on the inner inclined surface and emitted from the outer inclined surface at a smaller angle; this allows the small-angle incident light to be dispersed in a more uniform and controllable manner, avoiding the problems of direct light or excessive concentration, reducing light loss, and improving the anti-glare effect and light extraction rate. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of the light-controlling element according to a preferred embodiment of the present invention;
[0020] Figure 2 yes Figure 1 Schematic diagram of the microstructure;
[0021] Figure 3 yes Figure 2 A structural diagram from another angle;
[0022] Figure 4 This is a schematic diagram showing the direction of light propagation in the light-controlling element;
[0023] Figure 5 This is a schematic diagram of the structure of a lamp conforming to a preferred embodiment of the present invention;
[0024] Figure 6 yes Figure 5 An explosion diagram of a lamp.
[0025] The components in the attached diagram are labeled as follows:
[0026] Body 1, light-incident surface 11, light-exit surface 12;
[0027] Microstructure 2, inclined side 21, inner inclined surface 211, outer inclined surface 212, vertex 22;
[0028] Light control element 100;
[0029] Diffuser 110, light source 120, reflector 130, frame 140, chassis 150;
[0030] Lighting fixtures 200. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0032] It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.
[0033] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0034] Please see Figures 1 to 6As shown, an embodiment of the invention provides a light control element 100, including a body 1. The body 1 includes an incident light surface 11 and an emitting light surface 12 disposed opposite to each other. On the body 1, a plurality of microstructures 2 are formed by recessing inward from the emitting light surface 12. Each microstructure 2 includes a plurality of inclined side surfaces 21, and each inclined side surface 21 includes an inner inclined surface 211 and an outer inclined surface 212 disposed opposite to each other. The inner inclined surface 211 faces the incident light surface 11.
[0035] In some embodiments, a plurality of inclined sides 21 form a groove structure. The outer inclined surface 212 faces the groove structure. Some of the light rays entering from the incident surface 11 are refracted at the exit surface 12 after passing through the groove structure, and exit at a smaller angle. Therefore, the groove structure allows light to be scattered in a more uniform and controllable manner, improving the utilization rate of light.
[0036] When the incident angle of the incident light illuminating the incident light surface 11 is greater than a preset angle, the inclined side 21 performs total internal reflection on the incident light. When the incident angle of the incident light illuminating the incident light surface 11 is less than or equal to the preset angle, the inclined side 21 refracts the incident light before it exits. For example, when the incident angle of the incident light illuminating the incident light surface 11 is greater than 50° and less than 90°, the incident light undergoes total internal reflection on the inner inclined surface 211, and gradually weakens through multiple reflections within the light control element 100, preventing glare caused by large-angle light emission. When the incident angle of the incident light illuminating the incident light surface 11 is less than or equal to 50°, the incident light is refracted on the inner inclined surface 211 and exits from the outer inclined surface 212. The angle after refraction is reduced, causing the incident light to exit at a smaller angle. Therefore, light incident at a small angle is scattered more uniformly and controllably, avoiding the problems of direct light or excessive concentration, and improving the uniformity of light and the anti-glare effect.
[0037] In some embodiments, the microstructure is a recessed pyramidal structure with multiple inclined sides 21. Each inclined side 21 of the pyramidal structure can reflect and refract light, thus enabling light control in multiple directions. Furthermore, depending on different application scenarios and needs, the number and angle of the inclined sides 21 can be adjusted to achieve omnidirectional and multi-angle light control effects.
[0038] Please see Figures 2 to 4 As shown, in some embodiments, the microstructure 2 is a centrally symmetrical structure, which can reduce the complexity of mold design and reduce processing difficulty and cost. By making the microstructure 2 centrally symmetrical about the plane passing through the center line of the outer inclined surface 212 and perpendicular to the light-emitting surface 12, light is reflected or refracted evenly, thereby reducing the scattering and loss of light during propagation and improving the overall light utilization efficiency.
[0039] In some embodiments, the microstructure 2 consists of four inclined sides 21, which allows light to be evenly dispersed to the four inclined sides 21 when passing through the microstructure 2, thereby achieving multi-directional light control and avoiding uneven light spots or alternating bright and dark phenomena that may exist in traditional structures, thus improving the lighting quality.
[0040] In other embodiments, the number of inclined sides 21 in the same microstructure 2 can be an even number of four or more, and no limitation is set here. For example, in some practical scenarios, the microstructure 2 may include six inclined sides 21, so that when light passes through the microstructure 2, it can be evenly dispersed to the six inclined sides 21 to achieve multi-directional light control.
[0041] Please see Figure 1 and Figure 4 As shown, since multiple microstructures 2 are arranged in an array, adjacent microstructures 2 are connected by sharing a common edge on 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 direct transmission loss and edge scattering of light. Therefore, light entering from the incident surface 11 can be reflected or refracted by the microstructures 2 to the maximum extent, thereby improving the utilization efficiency of light.
[0042] Furthermore, since the light entering through the incident surface 11 will inevitably be reflected or refracted by the microstructure 2, the light that might have been emitted at a larger angle is guided to an even smaller emission angle range. Therefore, after passing through the microstructure 2, the light can be fully and uniformly dispersed, providing a more uniform and softer lighting effect.
[0043] Traditional prism designs typically employ a deep concave structure to achieve better anti-glare performance. To ensure this, commercially available prisms generally set the concave depth to one-third of the prism's overall height, typically around 0.5mm. However, because light undergoes more refraction and reflection when passing through a deeper concave structure, light loss occurs, making it difficult to guarantee light output.
[0044] In a preferred embodiment of the present invention, the inclined side surface 21 of the microstructure 2 is curved, curving away from the light-emitting surface 12 and towards the light-receiving surface 11. Because the inclined side surface 21 is curved, the curvature design of the surface allows light to be deflected and scattered to varying degrees depending on the shape and angle of the surface when it strikes it. This creates a non-uniform light distribution, effectively reducing direct light and glare, and allowing the light to be more finely dispersed and guided during propagation, achieving a uniform light distribution.
[0045] Therefore, the microstructure 2 adopts a curved surface design, which allows light to be deflected and scattered to varying degrees when it hits the inclined side 21, forming a non-uniform light distribution. This effectively reduces direct light and glare, thus significantly improving the anti-glare effect. Compared to a non-curved surface design, the curved surface design can achieve an anti-glare effect at a shallow height without requiring a deep opening. If a non-curved surface design is used, a deeper opening is needed to intercept large-angle incident light at a shallow height; however, with a deeper opening, small-angle light at a deeper height is prone to total internal reflection, thus reducing the light extraction efficiency. In this embodiment, the microstructure 2 adopts a curved surface design, which, even with a shallow concave structure, can intercept large-angle incident light, achieving total internal reflection of large-angle light at a shallow height to ensure sufficient anti-glare effect. At the same time, the curved surface design can refract small-angle light at a deeper height, allowing more light to escape and improving the light extraction rate.
[0046] Please see Figures 2 to 3 As shown, several inclined side surfaces 21 intersect at a vertex 22 within the groove. The distance between the light-emitting surface 12 and the vertex 22 is the first distance, and the distance between the light-incident surface 11 and the vertex 22 is the second distance. Furthermore, because the microstructure 2 adopts a curved surface design, the ratio of the first distance to the second distance can be less than 0.5.
[0047] Specifically, with the overall thickness of the light control element 100 being 1.5mm, combined with the curved surface design, the concave depth of the microstructure 2 is less than 0.45mm. The curved surface design allows light to diffuse more gently during emission, effectively reducing glare. Furthermore, due to the shallow concave depth of the microstructure, more light can be reflected, which helps improve the light extraction 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 curved surface design is adopted, so that the anti-glare effect of the microstructure 2 in this invention is basically the same as the anti-glare effect of a common 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 controlled to any of the following optimized values: 0.44 mm, 0.43 mm, 0.42 mm, and 0.41 mm.
[0050] Figure 4 This is a schematic diagram of the propagation direction of the incident light in microstructure 2.
[0051] Please see Figure 4As shown, multiple microstructures 2 are formed by indentation from the light-emitting surface 12 on the body 1; each microstructure 2 includes at least four inclined side surfaces 21, and the inclined side surfaces 21 are curved. Therefore, by setting the microstructures 2, the light-controlling element 100 achieves effective control of light, suppressing the direct emission of large-angle incident light and optimizing the emission mode of small-angle incident light. This reduces light loss and enhances the uniformity of light.
[0052] The inclined side 21 is configured to perform total internal reflection of the incident light when the incident angle of the incident light illuminating the incident light surface 11 is greater than a preset angle; and to refract and emit the incident light when the incident angle of the incident light illuminating the incident light surface 11 is less than or equal to the preset angle.
[0053] Specifically, when the incident angle of the incident light illuminating the incident surface 11 is greater than 50°, the incident light undergoes total internal reflection at the microstructure 2. When the incident angle of the incident light illuminating the inner inclined surface 211 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 2 is 40° to 70°. When the incident angle of the incident light illuminating the inner inclined surface 211 is less than 30°, the exit angle of the incident light after refraction by the microstructure 2 is 0° to 45°. With this configuration, light rays with different incident angles can exit within the expected angle range after passing through the microstructure 2, allowing the light to be dispersed at small angles. This effectively avoids glare and achieves efficient control of the incident light.
[0054] Accordingly, embodiments of the present invention also provide a lamp, please refer to... Figure 5 and Figure 6 .
[0055] The luminaire 200 includes a light-controlling element 100, a diffuser plate 110, a light source 120, and a chassis 150. The light-incident surface 11 of the light-controlling element 100 can be attached to the diffuser plate 110. In other embodiments, the light-controlling element 100 and the diffuser plate 110 are spaced apart and maintain a certain distance. The light source 120 is provided inside the chassis 150. The light source 120 is located on the side of the diffuser plate 110 away from the light-controlling element 100. The light emitted by the light source 120 passes through the diffuser plate 110 and the light-controlling element 100 in sequence and is then emitted uniformly.
[0056] Specifically, light sources 120 are arranged on a light source plate (not shown), which is placed inside a chassis 150, with the lower surface of the light source plate in contact with the chassis. The light control element 100 and the diffuser plate 110 are fixed on the upper frame 140, which is fixedly connected to the chassis 150.
[0057] In other embodiments, the light control element 100 and the diffuser plate 110 are mounted in the chassis 150 and placed above the light source plate. The frame 140 is fixedly connected to the chassis 150.
[0058] Please see Figure 6 As shown, some light rays are reflected from the inner inclined surface 211 out of the light-controlling element 100. To further improve the utilization rate of light, a reflector 130 is also provided on the side of the light source 120 away from the diffuser plate 110 to capture the underutilized light rays. That is, the light source 120 is located between the reflector 130 and the diffuser plate 110. The light rays emitted from the light-controlling element 100 onto the reflector 130 will be reflected on the reflector 130. The reflector 130 redirects the light rays back into the light-controlling element 100, reducing light waste and improving light extraction efficiency. The light rays reflected by the reflector 130 have a reduced incident angle, which helps the light rays to be better refracted, reflected, or scattered inside the light-controlling element 100, further improving the uniformity of light rays and light extraction efficiency. At the same time, reducing the incident angle also helps to reduce light leakage at the edge of the light-controlling element.
[0059] In summary, the light control element 100 of the present invention achieves effective control of light by forming multiple microstructures 2 recessed inward from the light-emitting surface 12 on the body 1. By providing several inclined side surfaces 21 on the microstructures 2, large-angle light can be totally internalized, and small-angle light can be refracted and emitted from the outer inclined surface 212. The microstructures 2 can reflect incident light with an incident angle greater than a preset angle, preventing glare caused by large-angle light emission. Light with an incident 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 small-angle incident light is scattered in a more uniform and controllable manner, reducing light loss, avoiding the problem of direct light or excessive concentration, and improving light uniformity and anti-glare effect. Compared with the prior art, the light control element 100 of the present invention, by setting the microstructures 2, suppresses the direct emission of large-angle incident light and optimizes the emission mode of small-angle incident light, thereby reducing light loss and improving light emission rate and anti-glare effect.
[0060] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims
1. A light control element, characterized by, include: The body (1) includes an incident light surface (11) and an exit light surface (12) disposed opposite to each other. Furthermore, a plurality of microstructures (2) are formed on the body (1) by recessing inward from the exit light surface (12). The microstructures (2) include a plurality of inclined side surfaces (21). The inclined side surface (21) is configured to perform total internal reflection of the incident light when the incident angle of the incident light illuminating the incident light surface (11) is greater than a preset angle; and to refract and emit the incident light when the incident angle of the incident light illuminating the incident light 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 surface (21) is a curved surface, which curves away from the light-emitting surface (12) and toward the light-incident surface (11).
3. The light control element according to claim 1, wherein Each of the inclined side surfaces (21) includes an inner inclined surface (211) facing the light incident surface (11). When the incident angle of the incident light irradiating the inner inclined surface (211) is greater than or equal to 30° and less than or equal to 50°, the exit angle of the incident light after being refracted by the microstructure (2) is 40° to 70°.
4. The light control element according to claim 1, wherein Each of the inclined side surfaces (21) includes an inner inclined surface (211) facing the light incident surface (11). When the incident angle of the incident light irradiating the inner inclined surface (211) is less than 30°, the exit angle of the incident light after being refracted by the microstructure (2) is 0° to 45°.
5. The light control element according to claim 1, wherein The microstructure (2) is a centrosymmetric structure.
6. The light control element according to any one of claims 1 to 5, wherein Multiple microstructures (2) are arranged in an array, and adjacent microstructures (2) are connected on the same side of the light-emitting surface (12).
7. The light control element according to any one of claims 1 to 5, wherein Several 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 concave depth of the microstructure (2) is less than 0.45 mm.
9. A luminaire characterized by, include: The light source (120) and the light control element (100) according to any one of claims 1 to 8 are provided, wherein the light incident surface (11) of the light control element (100) is attached to the light source (110), the light control element (100) and the light source (120) are respectively disposed on both sides of the light source (110), and the light emitted by the light source (120) passes through the light source (110) and the light control element (100) in sequence before being emitted.
10. The lamp according to claim 9, characterized in that, Also includes: A reflector (130) is provided, and the light source (120) is located between the reflector (130) and the diffuser (110). Light emitted from the light control element (100) is reflected by the reflector (130) to the light control element (100).